@article{AldorettaStLouisRichardsonetal.2015,
  author    = {Aldoretta, E. J. and St-Louis, N. and Richardson, N. D. and Moffat, Anthony F. J. and Eversberg, T. and Hill, G. M.},
  title     = {The Results of the 2013 Pro-Am Wolf-Rayet Campaign},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87713},
  pages     = {75 -- 78},
  year      = {2015},
  abstract  = {Professional and amateur astronomers around the world contributed to a 4-month long campaign in 2013, mainly in spectroscopy but also in photometry, interferometry and polarimetry, to observe the first 3 Wolf-Rayet stars discovered: WR 134 (WN6b), WR 135 (WC8) and WR 137 (WC7pd+O9). Each of these stars are interesting in their own way, showing a variety of stellar wind structures. The spectroscopic data from this campaign were reduced and analyzed for WR 134 in order to better understand its behavior and long-term periodicity in the context of CIRs in the wind. We will be presenting the results of these spectroscopic data, which include the confirmation of the CIR variability and a time-coherency of ∼ 40 days (half-life of ∼ 20 days).},
  language  = {en}
}
@article{Arthur2015,
  author    = {Arthur, S. J.},
  title     = {Wolf-Rayet nebulae and the wind-interstellar medium interaction},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88267},
  pages     = {315 -- 320},
  year      = {2015},
  abstract  = {I review our current understanding of the interaction between a Wolf-Rayet star's fast wind and the surrounding medium, and discuss to what extent the predictions of numerical simulations coincide with multiwavelength observations of Wolf-Rayet nebulae. Through a series of examples, I illustrate how changing the input physics affects the results of the numerical simulations. Finally, I discuss how numerical simulations together with multiwavelength observations of these objects allow us to unpick the previous mass-loss history of massive stars.},
  language  = {en}
}
@article{Baeriswyl2015,
  author    = {Baeriswyl, Pascale},
  title     = {Moderne Arbeitsmethoden f{\"u}r einen wirksameren UNO-Sicherheitsrat},
  series = {Konzepte f{\"u}r die Reform der Vereinten Nationen : 12. Potsdamer UNO-Konferenz am 28.Juni 2014},
  volume    = {2015},
  journal   = {Konzepte f{\"u}r die Reform der Vereinten Nationen : 12. Potsdamer UNO-Konferenz am 28.Juni 2014},
  number    = {11},
  editor    = {Zimmermann, Andreas},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-80159},
  pages     = {29 -- 47},
  year      = {2015},
  abstract  = {I. Der UNO-Sicherheitsrat: Work in Progress or in Regress? II. Geschichte der Arbeitsmethoden: Szenen und Akteure III. Arbeitsmechanik im Alltag: Mut zur Innovation! IV. Schlussfolgerung: Vom Kulturwandel zur Strukturreform?},
  language  = {de}
}
@article{BarnesKennewell2015,
  author    = {Barnes, Jan and Kennewell, Steve},
  title     = {Teacher Perceptions of Key Competencies in ICT},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82604},
  pages     = {61 -- 75},
  year      = {2015},
  abstract  = {Regardless of what is intended by government curriculum specifications and advised by educational experts, the competencies taught and learned in and out of classrooms can vary considerably. In this paper, we discuss in particular how we can investigate the perceptions that individual teachers have of competencies in ICT, and how these and other factors may influence students' learning. We report case study research which identifies contradictions within the teaching of ICT competencies as an activity system, highlighting issues concerning the object of the curriculum, the roles of the participants and the school cultures. In a particular case, contradictions in the learning objectives between higher order skills and the use of application tools have been resolved by a change in the teacher's perceptions which have not led to changes in other aspects of the activity system. We look forward to further investigation of the effects of these contradictions in other case studies and on forthcoming curriculum change.},
  language  = {en}
}
@article{BeckerBomansWeis2015,
  author    = {Becker, Andrew C. and Bomans, Dominik J. and Weis, K.},
  title     = {Finding new Wolf-Rayet stars in the Magellanic Clouds},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87618},
  pages     = {47 -- 50},
  year      = {2015},
  abstract  = {Obtaining a complete census of massive, evolved stars in a galaxy would be a key ingredient for testing stellar evolution models. However, as the evolution of stars is also strongly dependent on their metallicity, it is inevitable to have this kind of data for a variety of galaxies with different metallicities. Between 2009 and 2011, we conducted the Magellanic Clouds Massive Stars and Feedback Survey (MSCF); a spatially complete, multi-epoch, broad- and narrow-band optical imaging survey of the Large and Small Magellanic Clouds. With the inclusion of shallow images, we are able to give a complete photometric catalog of stars between B ≈ 18 and B ≈ 19 mag. These observations were augmented with additional photometric data of similar spatial res- olution from UV to IR (e.g. from GALEX, 2MASS and Spitzer) in order to sample a large portion of the spectral energy distribution of the brightest stars (B < 16 mag) in the Magel- lanic Clouds. Using these data, were are able to train a machine learning algorithm that gives us a good estimate of the spectral type of tens of thousands of stars. This method can be applied to the search for Wolf-Rayet-Stars to obtain a sample of candi- dates for follow-up observations. As this approach can, in principle, be adopted for any resolved galaxy as long as sufficient photometric data is available, it can form an effective alternative method to the classical strategies (e.g. He II filter imaging).},
  language  = {en}
}
@article{BeradzeKochiashviliNatsvlishvilietal.2015,
  author    = {Beradze, S. and Kochiashvili, N. and Natsvlishvili, R. and Kochiashvili, I. and Janiashvili, E. and Urushadze, T. and Vardosanidze, M.},
  title     = {P Cygni and its Observations at the Abastumani Observatory},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88389},
  pages     = {353},
  year      = {2015},
  abstract  = {We found original observations of PCygni by E. Kharadze and N. Magalashvili in the archives of the Abastumani Observatory. These observations were carried out in the period 1951-1983. Initially they used 29 Cygni as a comparison star, and all observations of PCygni were processed using this star. On the basis of their calculations, the authors decided that PCygni may be a WUMa type binary with an orbital period of 0.500565 d, but this hypothesis was not confirmed. The only observations that have been published in the Bulletin of the Abastumani Astrophysical Observatory were those of of 1951-1955. There are whole sets of observational data not only for PCygni and 29 Cygni, but in the majority of cases also for 36 Cygni in the archives. We recalculated all data (where it was possible) using 36 Cygni as a comparison star. We are presenting UBV light curves of the variable, and also observations made by V. Nikonov in Abastumani in the period 1935-1937},
  language  = {en}
}
@article{BergnerTaraschewskiSchroeder2015,
  author    = {Bergner, Nadine and Taraschewski, Christian and Schroeder, Ulrik},
  title     = {Beispiel eines Sch{\"u}lerwettbewerbs zum Thema Projektmanagement und App-Programmierung},
  series = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  volume    = {2015},
  journal   = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  number    = {9},
  editor    = {Schubert, Sigrid and Schwill, Andreas},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-84726},
  pages     = {161 -- 168},
  year      = {2015},
  abstract  = {Es wird ein Informatik-Wettbewerb f{\"u}r Sch{\"u}lerinnen und Sch{\"u}ler der Sekundarstufe II beschrieben, der {\"u}ber mehrere Wochen m{\"o}glichst realit{\"a}tsnah die Arbeitswelt eines Informatikers vorstellt. Im Wettbewerb erarbeiten die Sch{\"u}lerteams eine Android-App und organisieren ihre Entwicklung durch Projektmanagementmethoden, die sich an professionellen, agilen Prozessen orientieren. Im Beitrag werden der theoretische Hintergrund zu Wettbewerben, die organisatorischen und didaktischen Entscheidung, eine erste Evaluation sowie Reflexion und Ausblick dargestellt.},
  language  = {de}
}
@article{Bestenlehner2015,
  author    = {Bestenlehner, J. M.},
  title     = {Stellar parameters from photometric data for fainter and more distant Wolf-Rayet stars},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88390},
  pages     = {354},
  year      = {2015},
  abstract  = {Spectroscopy is the preferred way to study the physical and wind properties of Wolf-Rayet (WR) stars, but with decreasing brightness and increasing distance of the object spectroscopy become very expensive. However, photometry still delivers a high signal to noise ratio. Current and past astronomical surveys and space missions provide large data sets, that can be harvested to discover new WR stars and study them over a wide metallicity range with the help of state of the art stellar atmosphere and evolutionary models.},
  language  = {en}
}
@article{BibbySharaZureketal.2015,
  author    = {Bibby, J. and Shara, M. and Zurek, D. and Crowther, P. A. and Moffat, Anthony F. J. and Drissen, L. and Wilde, M.},
  title     = {The Distribution of Massive Stars in M101},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88402},
  pages     = {355},
  year      = {2015},
  abstract  = {75 WR stars and 164 RSGs are identified in a single WFC3 pointing of our M101 survey. We find that within it's large star-forming complex NGC 5462 WR stars are preferentially located in the core whilst RSGs are found in the halo, suggesting two bursts of star-formation. A review of our WR candidates reveals that only ∼30\% are detected in the archival broad-band ACS imaging whilst only ∼50\% are associated with HII regions.},
  language  = {en}
}
@article{Bischoff2015,
  author    = {Bischoff, Doerte},
  title     = {Passion und Gemeinschaft oder der andere Kosmopolitismus},
  series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  volume    = {21},
  journal   = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-331-2},
  issn      = {1614-6492},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-85851},
  pages     = {141 -- 164},
  year      = {2015},
  abstract  = {Bereits in der aufkl{\"a}rerischen Auseinandersetzung um Jesus' Judentum finden sich Tendenzen, dieses als Ausgangspunkt einer universalisierenden Vermittlung zwischen Judentum und Christentum zu entwerfen, wie auch - zumeist von j{\"u}discher Seite - Einspr{\"u}che gegen einen derartigen Universalismus, der entscheidende Differenzen und die Geschichte ausgrenzender Gewalt verleugne. Nach einem kurzen Blick auf den j{\"u}dischen Christus bei Heine analysiert der Beitrag Stefan Zweigs im Horizont des Ersten Weltkriegs und zionistischer Debatten entstandenes, 1917 publiziertes Drama „Jeremias". Die f{\"u}r die Konzeption des St{\"u}ckes zentrale {\"U}berblendung der Prophetenfigur Jeremias mit Christus treibt, so die These, die problematische Logik einer Opferstellvertretung hervor, die mit der Vorstellung einer durch (Opfer-)Blut konstituierten Gemeinschaft die Frage nach der Schuld (Christusmord) auf Andere verschiebt. Demgegen{\"u}ber entwirft das St{\"u}ck in Motiven der einbrechenden ‚Schrecknis', der Fremdheit im Eigenen, des Exils und der Weltwanderschaft einen anderen Kosmopolitismus.},
  language  = {de}
}
@article{BispinckRossbacher2015,
  author    = {Bispinck-Roßbacher, Julia},
  title     = {„Zwischen den Zeilen …"},
  series = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  volume    = {XVI},
  journal   = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  number    = {31},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  doi       = {10.18443/221},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88978},
  pages     = {43 -- 48},
  year      = {2015},
  abstract  = {Der Artikel besch{\"a}ftigt sich mit dem kodikologischen Befund der Amerikanischen Reisetageb{\"u}cher und materialtechnologischen Untersuchungen zu ihrem Papier und Beschreibstoffen. Der kodikologische Aspekt beinhaltet eine umfassende Erfassung aller physischen Merkmale und Besonderheiten der Tageb{\"u}cher, wobei ein Fokus auf die Zusammenstellung der Lagen, auf heraus getrennten oder ganz fehlenden Seiten liegt. Dies geschieht vor dem Hintergrund, die urspr{\"u}ngliche Zusammenstellung der Tageb{\"u}cher zu rekonstruieren, die Genese zu erforschen und im Nachlass befindliche Teile ggf. fehlenden Bl{\"a}ttern oder Fragmenten in den Tageb{\"u}chern zuzuordnen. Wasserzeichenaufnahmen mit der Thermographiekamera und Tintenanlaysen mithilfe der R{\"o}ntgenfluoreszenztechnik k{\"o}nnen dabei helfen aufzuzeigen, wie die Tageb{\"u}cher entstanden sind und wie sie bis zum Tod Alexander von Humboldts von ihm als Arbeitsinstrument genutzt wurden.},
  language  = {de}
}
@article{BlankensteinSavoy2015,
  author    = {Blankenstein, David and Savoy, B{\´e}n{\´e}dicte},
  title     = {Frontale Pr{\"a}senz},
  series = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  volume    = {XVI},
  journal   = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  number    = {31},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  doi       = {10.18443/225},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-89012},
  pages     = {107 -- 114},
  year      = {2015},
  abstract  = {Ein bislang unver{\"o}ffentlichtes Portr{\"a}t Alexander von Humboldts aus der Hand Fr{\´e}d{\´e}ric d'Houdetots, ein Sch{\"u}ler des Malers Jacques-Louis David, bereichert die Humboldt-Ikonographie um eine Darstellung, die den ber{\"u}hmten Reisenden und Gelehrten als jungen Mann, wenige Jahre nach seiner R{\"u}ckkehr aus Amerika zeigt - beeindruckend lebendig, fokussiert und pr{\"a}sent. Das 1807 w{\"a}hrend der Franzosenzeit in Berlin entstandene Portr{\"a}t verweist als Teil eines im Conseil d'{\´E}tat in Paris aufbewahrten Portr{\"a}t-Albums auf die Zirkel und Beziehungen, die sich in der besetzten preußischen Hauptstadt zwischen Besatzern, j{\"u}dischen Salonkreisen und der wissenschaftlichen Community gebildet haben, ein N{\"a}hrboden f{\"u}r den transnationalen Austausch von Vertretern einer jungen und vitalen Generation, die sich als echte Europ{\"a}er verstanden.},
  language  = {de}
}
@article{BomansBeckerKleemannetal.2015,
  author    = {Bomans, Dominik J. and Becker, Andrew C. and Kleemann, B. and Weis, K. and Pasquali, A.},
  title     = {Luminous Wolf-Rayet stars at low metallicity},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87635},
  pages     = {51 -- 54},
  year      = {2015},
  abstract  = {The evolution of massive stars in very low metallicity galaxies is less well observationally constrained than in environments more similar to the Milky Way, M33, or the LMC. We discuss in this contribution the current state of our program to search for and characterize Wolf-Rayet stars (and other massive emission line stars) in low metallicity galaxies in the Local Volume.},
  language  = {en}
}
@article{Bosco2015,
  author    = {Bosco, Lorella},
  title     = {„Wir haben Jesus gekreuzigt, […] aber ohne das w{\"a}re er nicht Jesus."},
  series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  volume    = {21},
  journal   = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-331-2},
  issn      = {1614-6492},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-85835},
  pages     = {105 -- 121},
  year      = {2015},
  abstract  = {Jakob Wassermanns Roman „Die Juden von Zirndorf" (1897), ein Sittengem{\"a}lde deutsch-j{\"u}dischen Lebens, ist von diversen messianischen Vorstellungen getragen, die nur zum Teil auf die j{\"u}dische Tradition zur{\"u}ckzuf{\"u}hren sind. Folglich vereint der j{\"u}dische Knabe Agathon, die Hauptgestalt des zweiten Romanteils, Z{\"u}ge sowohl des j{\"u}dischen Messias als auch des christlichen Heilands. Die hohe Anzahl von Anspielungen auf die Figur Jesu und die {\"a}sthetische Funktionalisierung christologischer Motive im Roman ist in den Kontext jener „Heimholung Jesu in das Judentum" einzubetten, die ab dem 19. Jahrhundert mit der Wissenschaft des Judentums einsetzte. Der vorliegende Beitrag wird - vor dem Hintergrund zeitgen{\"o}ssischer Jesus-Deutungen - sowohl auf die Spuren Jesu in der Charakterisierung Agathons als auch auf die Aneignung christologischer Motive vor allem im 2. Romanteil eingehen. Dabei soll insbesondere auf Lou von Salom{\´e}s Aufsatz „Jesus der Jude" (1896) als m{\"o}gliche Quelle verwiesen werden.},
  language  = {de}
}
@article{BottinoChioccariello2015,
  author    = {Bottino, Rosa and Chioccariello, Augusto},
  title     = {Computational Thinking},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82820},
  pages     = {301 -- 309},
  year      = {2015},
  abstract  = {Digital technology has radically changed the way people work in industry, finance, services, media and commerce. Informatics has contributed to the scientific and technological development of our society in general and to the digital revolution in particular. Computational thinking is the term indicating the key ideas of this discipline that might be included in the key competencies underlying the curriculum of compulsory education. The educational potential of informatics has a history dating back to the sixties. In this article, we briefly revisit this history looking for lessons learned. In particular, we focus on experiences of teaching and learning programming. However, computational thinking is more than coding. It is a way of thinking and practicing interactive dynamic modeling with computers. We advocate that learners can practice computational thinking in playful contexts where they can develop personal projects, for example building videogames and/or robots, share and discuss their construction with others. In our view, this approach allows an integration of computational thinking in the K-12 curriculum across disciplines.},
  language  = {en}
}
@article{Bredekamp2015,
  author    = {Bredekamp, Horst},
  title     = {Die Amerikanischen Reisetageb{\"u}cher},
  series = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  volume    = {XVI},
  journal   = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  number    = {31},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  doi       = {10.18443/220},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88963},
  pages     = {26 -- 42},
  year      = {2015},
  abstract  = {Die Reisetageb{\"u}cher der Amerika-Reise (1799-1804) stellen ein Kompendium an schriftlichen Eintr{\"a}gen, Tabellen, Diagrammen und Zeichnungen dar, das in der Tradition r{\"o}mischer Papiermuseen des 17. Jhs. steht. Sie k{\"o}nnen als Mikrokosmen kleiner Kunstkammern aufgefasst werden, in denen Naturobjekte, Kunstwerke und Arbeitsmittel einen gemeinsamen Reflexionsraum bilden. Im Zentrum des vorliegenden Beitrags steht Humboldts Auffassung einer gestalteten Bestimmung von Landschaft vermittels besonders einpr{\"a}gsamer Bildformen. Auf erstaunliche Weise n{\"a}hert sich Humboldts {\"A}sthetik der Gesamtsicht von Natur Charles Darwins Begriff der nat{\"u}rlichen Sch{\"o}nheit an. In den Reisetageb{\"u}chern zeigt sich ein heterogener, von Lebendigkeit zeugender Charakter, der sowohl durch das unterschiedliche Format der einzelnen Hefte, als auch durch die inkonsistente Behandlung des Papiers erreicht wird. Dieser bewegliche Zug setzt sich in zahlreichen Zetteln, Briefen und weiteren Texten fort als ein eigenes Prinzip von Evolution.},
  language  = {de}
}
@article{BroekerKastensMagenheim2015,
  author    = {Br{\"o}ker, Kathrin and Kastens, Uwe and Magenheim, Johannes},
  title     = {Competences of Undergraduate Computer Science Students},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82613},
  pages     = {77 -- 96},
  year      = {2015},
  abstract  = {The paper presents two approaches to the development of a Computer Science Competence Model for the needs of curriculum development and evaluation in Higher Education. A normativetheoretical approach is based on the AKT and ACM/IEEE curriculum and will be used within the recommendations of the German Informatics Society (GI) for the design of CS curricula. An empirically oriented approach refines the categories of the first one with regard to specific subject areas by conducting content analysis on CS curricula of important universities from several countries. The refined model will be used for the needs of students' e-assessment and subsequent affirmative action of the CS departments.},
  language  = {en}
}
@article{Buffon2015,
  author    = {Buffon, Giuseppe},
  title     = {The Franciscans in Cathay},
  series = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  volume    = {XVI},
  journal   = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  number    = {30},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-86920},
  pages     = {13 -- 28},
  year      = {2015},
  abstract  = {The study analyzes the process that leads to the elaboration of the thesis of a continuity between the Medieval Asia mission and the New World mission. This effort, undertaken by the Catholic historiography of the mission during the XIX century, is the result of the impulse provided by Alexander von Humboldt's studies about the discovery of America (Examen critique). The data about the geography of Asia collected by the missionaries-travelers working in the territory between Karakorum and Khanbalik during the XIII e XIV century reaches Christopher Colombus with the mediation of Roger Bacon, whom Humboldt himself esteems as a true cultural mediator. The conclusion of the article tries to identify reasons and modalities of the secularization of the missionary concept, i.e. the shift from the ideal of the propagation of the Christian message to a prevailing interest for cartography and topography, transformations arranged by a late medieval historiography that introduces into martyrolagia the loca toponomastica.},
  language  = {en}
}
@article{Buechner2015,
  author    = {B{\"u}chner, Steffen},
  title     = {Empirical and Normative Research on Fundamental Ideas of Embedded System Development},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82949},
  pages     = {393 -- 396},
  year      = {2015},
  language  = {en}
}
@article{CalderonBalloneCuadraetal.2015,
  author    = {Calder{\´o}n, D. and Ballone, A. and Cuadra, J. and Schartmann, M. and Burkert, Andreas and Gillessen, S.},
  title     = {Formation of the infalling Galactic Centre cloud G2 by collision of stellar winds},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88412},
  pages     = {356},
  year      = {2015},
  abstract  = {The gas cloud G2 is currently being tidally disrupted by the Galactic Centre super-massive black hole, Sgr A*. The region around the black hole is populated by ∼ 30 Wolf-Rayet stars, which produce strong outflows. Here we explore the possibility that gas clumps like G2 originate from the collision of stellar winds via the non-linear thin shell instability.},
  language  = {en}
}
@article{CheneWyrickBorissovaetal.2015,
  author    = {Chen{\´e}, A.-N. and Wyrick, D. and Borissova, J. and Kuhn, M. and Herv{\´e}, A. and Ram{\´i}rez Alegr{\´i}a, S. and Bonatto, C. and Bouret, J.-C. and Kurtev, R.},
  title     = {Improving distances to Galactic Wolf-Rayet stars},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87759},
  pages     = {97 -- 100},
  year      = {2015},
  abstract  = {Before GAIA improves the HIPPARCOS survey, direct determination of the distance via parallax is only possible for γ Vel, but the analysis of the cluster or association to which WR stars are associated can give distances with a 50\% to a 10\% accuracy. The list of Galactic clusters, associations and clusters/association candidates has grown significantly in the last decade with the numerous deep, high resolution surveys of the Milky Way. In this work, we revisit the fundamental parameters of known clusters with WR stars, and we present the search for new ones. All our work is based on the catalogs from the VVV (from the VISTA telescope) and the UKIDS (from the UKIRT telescope) near infrared surveys. Finally, the relations between the fundamental parameters of clusters with WR stars are explored.},
  language  = {en}
}
@article{Cherchneff2015,
  author    = {Cherchneff, I.},
  title     = {Dust formation in carbon-rich Wolf-Rayet colliding winds},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88177},
  pages     = {269 -- 274},
  year      = {2015},
  abstract  = {Carbon-rich Wolf-Rayet stars are efficient carbon dust makers. Despite the strong evidence for dust formation in these objects provided by infrared thermal emission from dust, the routes to nucleation and condensation and the physical conditions required for dust production are still poorly understood. We discuss here the potential routes to carbon dust and the possible locations conducive to dust formation in the colliding winds of WC binaries.},
  language  = {en}
}
@article{ChristensenKnezek2015,
  author    = {Christensen, Rhonda and Knezek, Gerald},
  title     = {The Technology Proficiency Self-Assessment Questionnaire (TPSA)},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82838},
  pages     = {311 -- 318},
  year      = {2015},
  abstract  = {The Technology Proficiency Self-Assessment (TPSA) questionnaire has been used for 15 years in the USA and other nations as a self-efficacy measure for proficiencies fundamental to effective technology integration in the classroom learning environment. Internal consistency reliabilities for each of the five-item scales have typically ranged from .73 to .88 for preservice or inservice technology-using teachers. Due to changing technologies used in education, researchers sought to renovate partially obsolete items and extend self-efficacy assessment to new areas, such as social media and mobile learning. Analysis of 2014 data gathered on a new, 34 item version of the TPSA indicates that the four established areas of email, World Wide Web (WWW), integrated applications, and teaching with technology continue to form consistent scales with reliabilities ranging from .81 to .93, while the 14 new items gathered to represent emerging technologies and media separate into two scales, each with internal consistency reliabilities greater than .9. The renovated TPSA is deemed to be worthy of continued use in the teaching with technology context.},
  language  = {en}
}
@article{Conti2015,
  author    = {Conti, P. S.},
  title     = {Concluding Remarks},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88347},
  pages     = {347 -- 350},
  year      = {2015},
  abstract  = {Selected remarks concerning Wolf-Rayet (W-R) stars in the framework of this workshop are given. The rich history of international conferences over the past four or so decades is summarized, important issues concerning W-R stars are considered, and some outstanding problems are reviewed.},
  language  = {en}
}
@article{Crowther2015,
  author    = {Crowther, P. A.},
  title     = {Wolf-Rayet content of the Milky Way},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87562},
  pages     = {21 -- 26},
  year      = {2015},
  abstract  = {An overview of the known Wolf-Rayet (WR) population of the Milky Way is presented, including a brief overview of historical catalogues and recent advances based on infrared photometric and spectroscopic observations resulting in the current census of 642 (vl.13 online catalogue). The observed distribution of WR stars is considered with respect to known star clusters, given that ≤20\% of WR stars in the disk are located in clusters. WN stars outnumber WC stars at all galactocentric radii, while early-type WC stars are strongly biased against the inner Milky Way. Finally, recent estimates of the global WR population in the Milky Way are reassessed, with 1,200±100 estimated, such that the current census may be 50\% complete. A characteristic WR lifetime of 0.25 Myr is inferred for an initial mass threshold of 25 M⊙.},
  language  = {en}
}
@article{Curzon2015,
  author    = {Curzon, Paul},
  title     = {Unplugged Computational Thinking for Fun},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82575},
  pages     = {15 -- 27},
  year      = {2015},
  abstract  = {Computational thinking is a fundamental skill set that is learned by studying Informatics and ICT. We argue that its core ideas can be introduced in an inspiring and integrated way to both teachers and students using fun and contextually rich cs4fn 'Computer Science for Fun' stories combined with 'unplugged' activities including games and magic tricks. We also argue that understanding people is an important part of computational thinking. Computational thinking can be fun for everyone when taught in kinaesthetic ways away from technology.},
  language  = {en}
}
@article{DagieneStupuriene2015,
  author    = {Dagiene, Valentina and Stupuriene, Gabriele},
  title     = {Informatics Education based on Solving Attractive Tasks through a Contest},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82626},
  pages     = {97 -- 115},
  year      = {2015},
  abstract  = {The paper discusses the issue of supporting informatics (computer science) education through competitions for lower and upper secondary school students (8-19 years old). Competitions play an important role for learners as a source of inspiration, innovation, and attraction. Running contests in informatics for school students for many years, we have noticed that the students consider the contest experience very engaging and exciting as well as a learning experience. A contest is an excellent instrument to involve students in problem solving activities. An overview of infrastructure and development of an informatics contest from international level to the national one (the Bebras contest on informatics and computer fluency, originated in Lithuania) is presented. The performance of Bebras contests in 23 countries during the last 10 years showed an unexpected and unusually high acceptance by school students and teachers. Many thousands of students participated and got a valuable input in addition to their regular informatics lectures at school. In the paper, the main attention is paid to the developed tasks and analysis of students' task solving results in Lithuania.},
  language  = {en}
}
@article{DalBo2015,
  author    = {Dal Bo, Federico},
  title     = {The Theological and Cultural Challenge of Messianic Jews},
  series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  volume    = {21},
  journal   = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-331-2},
  issn      = {1614-6492},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-85762},
  pages     = {33 -- 58},
  year      = {2015},
  abstract  = {Messianische Juden sind Juden, die den messianischen Charakter Jesus sowohl wie den in traditionelles Judentum {\"u}bermittelten Kult synkretistisch annehmen. Der vorliegende Beitrag untersucht die Entstehung dieser synkretistischen und im heutigen Israel marginalen Bewegung und behauptet, dass sie eine radikale Entwicklung in der zweitausendj{\"a}hrigen Geschichte der j{\"u}disch-christlichen Beziehungen darstellt. Dieser Beitrag bietet eine allgemeine Einf{\"u}hrung in den Begriff der j{\"u}disch-christlichen Identit{\"a}t, eine kurze Geschichte von der ersten Gruppe der messianischen Juden im Land Israels, einen {\"U}berblick {\"u}ber den religi{\"o}sen Synkretismus der messianischen Juden und ihren den kulturellen Einfluss auf den modernen Israel und, schließlich, die Implikation, dass das messianische Judentum f{\"u}r ein neues Paradigma innerhalb der verschiedenen Hauptstr{\"o}mungen des Judentums gehalten werden sollte.},
  language  = {en}
}
@article{DelgadoKloos2015,
  author    = {Delgado Kloos, Carlos},
  title     = {What about the Competencies of Educators in the New Era of Digital Education?},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-83015},
  pages     = {435 -- 438},
  year      = {2015},
  abstract  = {A lot has been published about the competencies needed by students in the 21st century (Ravenscroft et al., 2012). However, equally important are the competencies needed by educators in the new era of digital education. We review the key competencies for educators in light of the new methods of teaching and learning proposed by Massive Open Online Courses (MOOCs) and their on-campus counterparts, Small Private Online Courses (SPOCs).},
  language  = {en}
}
@misc{Denz2015,
  author    = {Denz, Rebekka},
  title     = {Christian Dietrich: Verweigerte Anerkennung. Selbstbestimmungsdebatten im „Centralverein deutscher Staatsb{\"u}rger j{\"u}dischen Glaubens" vor dem Ersten Weltkrieg / rezensiert von Rebekka Denz},
  series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  volume    = {21},
  journal   = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-331-2},
  issn      = {1614-6492},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-86258},
  pages     = {252 -- 255},
  year      = {2015},
  abstract  = {Rezensiertes Werk: Christian Dietrich: Verweigerte Anerkennung. Selbstbestimmungsdebatten im „Centralverein deutscher Staatsb{\"u}rger j{\"u}dischen Glaubens" vor dem Ersten Weltkrieg. Berlin: Metropol 2014. 240 S.},
  language  = {de}
}
@article{Dessart2015,
  author    = {Dessart, L.},
  title     = {Wolf-Rayet stars as supernova progenitors},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88133},
  pages     = {245 -- 250},
  year      = {2015},
  abstract  = {In this review, I discuss the suitability of massive star progenitors, evolved in isolation or in interacting binaries, for the production of observed supernovae (SNe) IIb, Ib, Ic. These SN types can be explained through variations in composition. The critical need of non-thermal effects to produce He I lines favours low-mass He-rich ejecta (in which ^56 Ni can be more easily mixed with He) for the production of SNe IIb/Ib, which thus may arise preferentially from moderate-mass donors in interacting binaries. SNe Ic may instead arise from higher mass progenitors, He-poor or not, because their larger CO cores prevent efficient non-thermal excitation of He i lines. However, current single star evolution models tend to produce Wolf-Rayet (WR) stars at death that have a final mass of > 10 M⊙. Single WR star explosion models produce ejecta that are too massive to match the observed light curve widths and rise times of SNe IIb/Ib/Ic, unless their kinetic energy is systematically and far greater than the canonical value of 10^56 erg. Future work is needed to evaluate the energy/mass degeneracy in light curve properties. Alternatively, a greater mass loss during the WR phase, perhaps in the form of eruptions, as evidenced in SNe Ibn, may reduce the final WR mass. If viable, such explosions would nonetheless favour a SN Ic, not a Ib.},
  language  = {en}
}
@article{DiethelmSyrbe2015,
  author    = {Diethelm, Ira and Syrbe, J{\"o}rn},
  title     = {Let's talk about CS!},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82983},
  pages     = {411 -- 414},
  year      = {2015},
  abstract  = {To communicate about a science is the most important key competence in education for any science. Without communication we cannot teach, so teachers should reflect about the language they use in class properly. But the language students and teachers use to communicate about their CS courses is very heterogeneous, inconsistent and deeply influenced by tool names. There is a big lack of research and discussion in CS education regarding the terminology and the role of concepts and tools in our science. We don't have a consistent set of terminology that we agree on to be helpful for learning our science. This makes it nearly impossible to do research on CS competencies as long as we have not agreed on the names we use to describe these. This workshop intends to provide room to fill with discussion and first ideas for future research in this field.},
  language  = {en}
}
@article{DwarkadasRosenberg2015,
  author    = {Dwarkadas, Vikram V. and Rosenberg, D.},
  title     = {X-ray Emission from Ionized Wind-Bubbles around Wolf-Rayet Stars},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88301},
  pages     = {329 -- 332},
  year      = {2015},
  abstract  = {Using a code that employs a self-consistent method for computing the effects of photoionization on circumstellar gas dynamics, we model the formation of wind-driven nebulae around massive Wolf-Rayet (W-R) stars. Our algorithm incorporates a simplified model of the photo-ionization source, computes the fractional ionization of hydrogen due to the photoionizing flux and recombination, and determines self-consistently the energy balance due to ionization, photo-heating and radiative cooling. We take into account changes in stellar properties and mass-loss over the star's evolution. Our multi-dimensional simulations clearly reveal the presence of strong ionization front instabilities. Using various X-ray emission models, and abundances consistent with those derived for W-R nebulae, we compute the X-ray flux and spectra from our wind bubble models. We show the evolution of the X-ray spectral features with time over the evolution of the star, taking the absorption of the X-rays by the ionized bubble into account. Our simulated X-ray spectra compare reasonably well with observed spectra of Wolf-Rayet bubbles. They suggest that X-ray nebulae around massive stars may not be easily detectable, consistent with observations.∗},
  language  = {en}
}
@article{EldridgeMcClellandXiaoetal.2015,
  author    = {Eldridge, J. J. and McClelland, L. A. S. and Xiao, L. and Stanway, E. R. and Bray, J.},
  title     = {The importance of getting single-star and binary physics correct},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87966},
  pages     = {177 -- 182},
  year      = {2015},
  abstract  = {We discuss the uncertainties that need to be considered when creating numerical models of WR stars. We pay close attention to inflation and duplicity of the stellar models, highlighting several observational tests that show these are key to understanding WR stellar populations.},
  language  = {en}
}
@article{EllisAbreuEllis2015,
  author    = {Ellis, Jason Brent and Abreu-Ellis, Carla Reis},
  title     = {Student Perspectives of Social Networking use in Higher Education},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82632},
  pages     = {117 -- 131},
  year      = {2015},
  abstract  = {Social networks are currently at the forefront of tools that lend to Personal Learning Environments (PLEs). This study aimed to observe how students perceived PLEs, what they believed were the integral components of social presence when using Facebook as part of a PLE, and to describe student's preferences for types of interactions when using Facebook as part of their PLE. This study used mixed methods to analyze the perceptions of graduate and undergraduate students on the use of social networks, more specifically Facebook as a learning tool. Fifty surveys were returned representing a 65 \% response rate. Survey questions included both closed and open-ended questions. Findings suggested that even though students rated themselves relatively well in having requisite technology skills, and 94 \% of students used Facebook primarily for social use, they were hesitant to migrate these skills to academic use because of concerns of privacy, believing that other platforms could fulfil the same purpose, and by not seeing the validity to use Facebook in establishing social presence. What lies at odds with these beliefs is that when asked to identify strategies in Facebook that enabled social presence to occur in academic work, the majority of students identified strategies in five categories that lead to social presence establishment on Facebook during their coursework.},
  language  = {en}
}
@article{EngbringKlar2015,
  author    = {Engbring, Dieter and Klar, Tilman-Mathies},
  title     = {Medienbildung mit Informatik-Anteilen!?},
  series = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  volume    = {2015},
  journal   = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  number    = {9},
  editor    = {Schubert, Sigrid and Schwill, Andreas},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-84693},
  pages     = {125 -- 142},
  year      = {2015},
  abstract  = {Auf der Grundlage der Planung, Durchf{\"u}hrung, Evaluation und Revision eines gemeinsamen Seminars von Medienp{\"a}dagogik und Didaktik der Informatik stellen wir in diesem Aufsatz dar, wo die Defizite klassischer Medienbildung in Bezug auf digitale bzw. interaktive Medien liegen und welche Inhalte der Informatik f{\"u}r Studierende aller Lehr{\"a}mter - im allgemeinbildenden Sinne - aus dieser Perspektive relevant erscheinen.},
  language  = {de}
}
@article{ErdmannWeber2015,
  author    = {Erdmann, Dominik and Weber, Jutta},
  title     = {Nachlassgeschichten},
  series = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  volume    = {XVI},
  journal   = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  number    = {31},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  doi       = {10.18443/223},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88997},
  pages     = {60 -- 79},
  year      = {2015},
  abstract  = {Der Artikel schildert die Geschichte verschiedener Teile des Manuskriptnachlasses Alexander von Humboldts, die sich heute in der Staatsbibliothek zu Berlin - Preußischer Kulturbesitz (SBB) und in der Biblioteka Jagiellońska in Krakau (BJ) befinden. Dabei wird insbesondere auf den unterschiedlichen ‚Quellenwert' der drei großen Nachlassabteilungen - der amerikanischen Reisetageb{\"u}cher, der Kollektaneen zum Kosmos (beide SBB) und dem sogenannten Nachlass Alexander von Humboldt (BJ) - eingegangen.},
  language  = {de}
}
@article{EversbergAldorettaKnapenetal.2015,
  author    = {Eversberg, T. and Aldoretta, E. J. and Knapen, J. H. and Moffat, Anthony F. J. and Morel, T. and Ramiaramanantsoa, T. and Rauw, G. and Richardson, N. D. and St-Louis, N. and Teodoro, M.},
  title     = {World-wide amateur observations},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87705},
  pages     = {71 -- 74},
  year      = {2015},
  abstract  = {For some years now, spectroscopic measurements of massive stars in the amateur domain have been fulfilling professional requirements. Various groups in the northern and southern hemispheres have been established, running successful professional-amateur (ProAm) collaborative campaigns, e.g., on WR, O and B type stars. Today high quality data (echelle and long-slit) are regularly delivered and corresponding results published. Night-to-night long-term observations over months to years open a new opportunity for massive-star research. We introduce recent and ongoing sample campaigns (e.g. ∊ Aur, WR 134, ζ Pup), show respective results and highlight the vast amount of data collected in various data bases. Ultimately it is in the time-dependent domain where amateurs can shine most.},
  language  = {en}
}
@article{FalcetaGoncalves2015,
  author    = {Falceta-Goncalves, D.},
  title     = {Magnetic fields, non-thermal radiation and particle acceleration in colliding winds of WR-O stars},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88211},
  pages     = {289 -- 292},
  year      = {2015},
  abstract  = {Non-thermal emission has been detected in WR-stars for many years at long wavelengths spectral range, in general attributed to synchrotron emission. Two key ingredients are needed to explain such emissions, namely magnetic fields and relativistic particles. Particles can be accelerated to relativistic speeds by Fermi processes at strong shocks. Therefore, strong synchrotron emission is usually attributed to WR binarity. The magnetic field may also be amplified at shocks, however the actual picture of the magnetic field geometry, intensity, and its role on the acceleration of particles at WR binary systems is still unclear. In this work we discuss the recent developments in MHD modelling of wind-wind collision regions by means of numerical simulations, and the coupled particle acceleration processes related.},
  language  = {en}
}
@article{FietkauKindsmuellerGoettel2015,
  author    = {Fietkau, Julian and Kindsm{\"u}ller, Martin Christof and G{\"o}ttel, Timo},
  title     = {Rapid Prototyping von Interaktionskonzepten in der universit{\"a}ren MCI-Lehre},
  series = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  volume    = {2015},
  journal   = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  number    = {9},
  editor    = {Schubert, Sigrid and Schwill, Andreas},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-84718},
  pages     = {153 -- 160},
  year      = {2015},
  abstract  = {In der Lehre zur MCI (Mensch-Computer-Interaktion) stellt sich immer wieder die Herausforderung, praktische {\"U}bungen mit spannenden Ergebnissen durchzuf{\"u}hren, die sich dennoch nicht in technischen Details verlieren sondern MCI-fokussiert bleiben. Im Lehrmodul „Interaktionsdesign" an der Universit{\"a}t Hamburg werden von Studierenden innerhalb von drei Wochen prototypische Interaktionskonzepte f{\"u}r das Spiel Neverball entworfen und praktisch umgesetzt. Anders als in den meisten Grundlagenkursen zur MCI werden hier nicht Mock-Ups, sondern lauff{\"a}hige Software entwickelt. Um dies innerhalb der Projektzeit zu erm{\"o}glichen, wurde Neverball um eine TCP-basierte Schnittstelle erweitert. So entf{\"a}llt die aufw{\"a}ndige Einarbeitung in den Quellcode des Spiels und die Studierenden k{\"o}nnen sich auf ihre Interaktionsprototypen konzentrieren. Wir beschreiben die Erfahrungen aus der mehrmaligen Durchf{\"u}hrung des Projektes und erl{\"a}utern unser Vorgehen bei der Umsetzung. Die Ergebnisse sollen Lehrende im Bereich MCI unterst{\"u}tzen, {\"a}hnliche praxisorientierte {\"U}bungen mit Ergebnissen „zum Anfassen" zu gestalten.},
  language  = {de}
}
@article{FroitzheimBergnerSchroeder2015,
  author    = {Froitzheim, Manuel and Bergner, Nadine and Schroeder, Ulrik},
  title     = {Android-Workshop zur Vertiefung der Kenntnisse bez{\"u}glich Datenstrukturen und Programmierung in der Studieneingangsphase},
  series = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  volume    = {2015},
  journal   = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  number    = {9},
  editor    = {Schwill, Andreas},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-80247},
  pages     = {11 -- 26},
  year      = {2015},
  abstract  = {Die Studieneingangsphase stellt f{\"u}r Studierende eine Schl{\"u}sselphase des terti{\"a}ren Ausbildungsabschnitts dar. Fachwissenschaftliches Wissen wird praxisfern vermittelt und die Studierenden k{\"o}nnen die Zusammenh{\"a}nge zwischen den Themenfeldern der verschiedenen Vorlesungen nicht erkennen. Zur Verbesserung der Situation wurde ein Workshop entwickelt, der die Verbindung der Programmierung und der Datenstrukturen vertieft. Dabei wird das Spiel Go-Moku1 als Android-App von den Studierenden selbst{\"a}ndig entwickelt. Die Kombination aus Software (Java, Android-SDK) und Hardware (Tablet-Computer) f{\"u}r ein kleines realistisches Softwareprojekt stellt f{\"u}r die Studierenden eine neue Erfahrung dar.},
  language  = {de}
}
@article{Garrido2015,
  author    = {Garrido, Elisa},
  title     = {Arte, ciencia y cultura visual en el atlas pintoresco},
  series = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  volume    = {XVI},
  journal   = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  number    = {30},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-86949},
  pages     = {54 -- 67},
  year      = {2015},
  abstract  = {Lo pintoresco se puede definir como un sentimiento que invita al espectador de una escena particular a reproducirla en un cuadro, algo que permiti{\´o} a los viajeros del siglo XIX transportar las im{\´a}genes como posesiones, especialmente a trav{\´e}s de la publicaci{\´o}n de un Atlas Pittoresque. Cada una de esas im{\´a}genes es un testimonio de los viajes y sus historias cruzadas. Este es el caso de la l{\´a}mina III, Vista de la Plaza Mayor de M{\´e}xico, que forma parte de la obra Vues des Cordill{\`e}res et Monuments des Peuples Indig{\`e}nes de l'Am{\´e}rique, una imagen que ilustra las redes de intercambio que se suced{\´i}an entre artistas y cient{\´i}ficos a trav{\´e}s de los viajes y expediciones.},
  language  = {es}
}
@article{GeorgyEkstroemHirschietal.2015,
  author    = {Georgy, C. and Ekstr{\"o}m, S. and Hirschi, R. and Meynet, G. and Groh, J. H. and Eggenberger, P.},
  title     = {Wolf-Rayet stars as an evolved stage of stellar life},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88097},
  pages     = {229 -- 232},
  year      = {2015},
  abstract  = {Wolf-Rayet (WR) stars, as they are advanced stages of the life of massive stars, provide a good test for various physical processes involved in the modelling of massive stars, such as rotation and mass loss. In this paper, we show the outputs of the latest grids of single massive stars computed with the Geneva stellar evolution code, and compare them with some observations. We present a short discussion on the shortcomings of single stars models and we also briefly discuss the impact of binarity on the WR populations.},
  language  = {en}
}
@article{Glittenberg2015,
  author    = {Glittenberg, Barbara},
  title     = {E-Learning},
  series = {Schulen im kommunalen Bildungsmanagement},
  journal   = {Schulen im kommunalen Bildungsmanagement},
  editor    = {Bauer, Hartmut and B{\"u}chner, Christiane and Markmann, Friedrich},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88581},
  pages     = {67 -- 80},
  year      = {2015},
  language  = {de}
}
@article{GormazMatamalaHerveCheneetal.2015,
  author    = {Gormaz-Matamala, A. C. and Herv{\´e}, A. and Chen{\´e}, A.-N. and Cur{\´e}, M. and Mennickent, R. E.},
  title     = {Results Of The Spectroscopic Analysis Of WR6 Using CMFGEN},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88422},
  pages     = {357},
  year      = {2015},
  abstract  = {Using ESPaDOnS optical spectra of WR6, we search variations on the stellar wind parameters during the different phases of the spectral variations. We use the radiative transfer code CMFGEN (Hillier \& Miller 1998) to determine the wind parameters. Our work gives mean parameters for WR6, Teff = 55 kK, M = 2.7 × 10^-5 M⊙/yr and v∞ =1700 km/s. Furthermore the line profiles variations at different phases are the consequence of a variation of mass loss rate and temperature un the winds. Effective temperature reaches 59 kK at the highest intensity, whereas the mass-loss rate decreases to 2.5 × 10^-5 M⊙/yr in that case. On the other hand, effective temperature decreases to 52.5 kK and the mass-loss rate increases to 3 × 10^-5 M/⊙yr when the line profile reach its minimum intensity. Results confirm the variable nature of the stellar wind, presented in this case on two of its fundamental parameters: temperature and mass-loss; which could be used to constrain the nature of the instability at the basis of the wind.},
  language  = {en}
}
@article{Gosset2015,
  author    = {Gosset, E.},
  title     = {Studies of WR+O colliding-wind binaries},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88247},
  pages     = {305 -- 308},
  year      = {2015},
  abstract  = {Two of the main physical parameters that govern the massive star evolution, the mass and the mass-loss rate, are still poorly determined from the observational point of view. Only binary systems could provide well constrained masses and colliding-wind binaries could bring some constraints on the mass-loss rate. Therefore, colliding-wind binaries turn out to be very promising objects. In this framework, we present detailed studies of basic observational data obtained with the XMM-Newton facility and combined with ground-based observations and other data. We expose the results for two particularly interesting WR+O colliding-wind binaries: WR22 and WR21a.},
  language  = {en}
}
@article{GrassitelliLangerSanyaletal.2015,
  author    = {Grassitelli, L. and Langer, N. and Sanyal, D. and Fossati, Luca and Bestenlehner, J. M.},
  title     = {Instabilities in the envelope of Wolf-Rayet stars},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88024},
  pages     = {201 -- 204},
  year      = {2015},
  abstract  = {Wolf-Rayet stars are very hot stars close to the Eddington limit. In the conditions encountered in their radiation pressure dominated outer layers several instabilities are expected to arise. These instabilities could influence both the dynamic of their optically thick winds and the observed spectral lines introducing small and large scale variability. We investigate the conditions in the convective envelopes of our helium star models and relate them to the appearance of a high number of stochastic density inhomogeneities, i.e. clumping in the optically thick wind. We also investigate the pulsational stability of these envelope, considering the effect of the high stellar wind mass loss rates.},
  language  = {en}
}
@article{GrillenbergerRomeike2015,
  author    = {Grillenberger, Andreas and Romeike, Ralf},
  title     = {Teaching Data Management},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82648},
  pages     = {133 -- 150},
  year      = {2015},
  abstract  = {Data management is a central topic in computer science as well as in computer science education. Within the last years, this topic is changing tremendously, as its impact on daily life becomes increasingly visible. Nowadays, everyone not only needs to manage data of various kinds, but also continuously generates large amounts of data. In addition, Big Data and data analysis are intensively discussed in public dialogue because of their influences on society. For the understanding of such discussions and for being able to participate in them, fundamental knowledge on data management is necessary. Especially, being aware of the threats accompanying the ability to analyze large amounts of data in nearly real-time becomes increasingly important. This raises the question, which key competencies are necessary for daily dealings with data and data management. In this paper, we will first point out the importance of data management and of Big Data in daily life. On this basis, we will analyze which are the key competencies everyone needs concerning data management to be able to handle data in a proper way in daily life. Afterwards, we will discuss the impact of these changes in data management on computer science education and in particular database education.},
  language  = {en}
}
@article{Groh2015,
  author    = {Groh, J. H.},
  title     = {The end stages of massive star evolution},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88115},
  pages     = {237 -- 240},
  year      = {2015},
  abstract  = {The morphological appearance of massive stars across their post-Main Sequence evolution and before the SN event is very uncertain, both from a theoretical and observational perspective. We recently developed coupled stellar evolution and atmospheric modeling of stars done with the Geneva and CMFGEN codes, for initial masses between 9 and 120 M⊙. We are able to predict the observables such as the high-resolution spectrum and broadband photometry. Here I discuss how the spectrum of a massive star changes across its evolution and before death, with focus on the WR stage. Our models indicate that single stars with initial masses larger than 30 M⊙ end their lives as WR stars. Depending on rotation, the spectrum of the star can either be that of a WN or WO subtype at the pre-SN stage. Our models allow, for the first time, direct comparison between predictions from stellar evolution models and observations of SN progenitors.},
  language  = {en}
}
@article{Grosse2015,
  author    = {Große, Gerrit},
  title     = {Privatschulen in der kommunalen Bildungslandschaft},
  series = {Schulen im kommunalen Bildungsmanagement},
  journal   = {Schulen im kommunalen Bildungsmanagement},
  editor    = {Bauer, Hartmut and B{\"u}chner, Christiane and Markmann, Friedrich},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88626},
  pages     = {129 -- 133},
  year      = {2015},
  language  = {de}
}
@misc{Groezinger2015,
  author    = {Gr{\"o}zinger, Elvira},
  title     = {Benjamin M. Grilj (Hrsg.): Schwarze Milch. Zur{\"u}ckgehaltene Briefe aus den Todeslagern Transnistriens / rezensiert von Elvira Gr{\"o}zinger},
  series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  volume    = {21},
  journal   = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-331-2},
  issn      = {1614-6492},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-86360},
  pages     = {262 -- 265},
  year      = {2015},
  abstract  = {Rezensiertes Werk: Benjamin M. Grilj (Hrsg.): Schwarze Milch. Zur{\"u}ckgehaltene Briefe aus den Todeslagern Transnistriens. In Kooperation mit Serhij Osatschuk und Dmytro Zhmundyljak. Innsbruck - Wien - Bozen: Studien Verlag 2013. 1077 S.},
  language  = {de}
}
@misc{Groezinger2015,
  author    = {Gr{\"o}zinger, Elvira},
  title     = {Die Verfolgung und Ermordung der europ{\"a}ischen Juden durch das nationalsozialistische Deutschland 1933-1945. Bd. 9: Polen. Generalgouvernement August 1941-1945 / rezensiert von Elvira Gr{\"o}zinger},
  series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  volume    = {21},
  journal   = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-331-2},
  issn      = {1614-6492},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-86334},
  pages     = {259 -- 262},
  year      = {2015},
  abstract  = {Rezensiertes Werk: Die Verfolgung und Ermordung der europ{\"a}ischen Juden durch das nationalsozialistische Deutschland 1933-1945. Bd. 9: Polen. Generalgouvernement August 1941-1945. Bearbeitet von Klaus-Peter Friedrich. M{\"u}nchen: Oldenbourg 2014. 878 S.},
  language  = {de}
}
@article{Guerrero2015,
  author    = {Guerrero, Mart{\´i}n A.},
  title     = {Planetary nebulae and Their Central Stars in X-rays},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88160},
  pages     = {263 -- 266},
  year      = {2015},
  abstract  = {Two types of X-ray sources are mostly found in planetary nebulae (PNe): point sources at their central stars and diffuse emission inside hot bubbles. Here we describe these two types of sources based on the most recent observations obtained in the framework of the Chandra Planetary Nebula Survey, ChanPlaNS, an X-ray survey targeting a volume-limited sample of PNe. Diffuse X-ray emission is found preferentially in young PNe with sharp, closed inner shells. Point sources of X-ray emission at the central stars reveal magnetically active binary companions and shock-in stellar winds.},
  language  = {en}
}
@article{Gull2015,
  author    = {Gull, T. R.},
  title     = {Eta Carinae},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87876},
  pages     = {149 -- 154},
  year      = {2015},
  abstract  = {Since Augusto Damineli's demonstration in 1996 that Eta Carinae is a binary with a 5.52 year period, many innovative observations and increasingly advanced three-dimensional models have led to considerable insight on this massive system that ejected at least ten, possibly forty, solar masses in the nineteenth century. Here we present a review of our current understanding of this complex system and point out continuing puzzles.},
  language  = {en}
}
@article{GomezGonzalezMayyaRosaGonzalez2015,
  author    = {G{\´o}mez-Gonz{\´a}lez, V{\´i}ctor Mauricio Alfonso and Mayya, Yalia Divakara and Rosa-Gonz{\´a}lez, D.},
  title     = {Detection and Characterization of Wolf-Rayet stars in M81 with GTC/OSIRIS spectra and HST images},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87604},
  pages     = {43 -- 46},
  year      = {2015},
  abstract  = {Here we investigate a sample of young star clusters (YSCs) and other regions of recent star formation with Wolf-Rayet (W-R) features detected in the relatively nearby spiral galaxy M81 by analysing long-slit (LS) and Multi-Object Spectroscopy (MOS) spectra obtained with the OSIRIS instrument at the 10.4-m Gran Telescopio Canarias (GTC). We take advantage of the synergy between GTC spectra and Hubble Space Telescope (HST) images to also reveal their spatial localization and the environments hosting these stars. We finally discuss and comment on the next steps of our study.},
  language  = {en}
}
@article{HamaguchiCorcoran2015,
  author    = {Hamaguchi, K. and Corcoran, M. F.},
  title     = {Extremely Hard X-ray Emission from η Car Observed with XMM-Newton and NuSTAR around Periastron in 2014.6},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87926},
  pages     = {159 -- 162},
  year      = {2015},
  abstract  = {The super massive binary system, η Car, experienced periastron passage in the summer of 2014. We observed the star twice around the maximum (forb =0.97, 2014 June 6) and just before the minimum (ϕorb =0.99, 2014 July 28) of its wind-wind colliding (WWC) X-ray emis-sion using the XMM-Newton and NuSTAR observatories, the latter of which is equipped with extremely hard X-ray (>10 keV) focusing mirrors. In both observations, NuSTAR detected the thermal X-ray tail up to 40-50 keV. The hard slope is consistent with an electron tem- perature of ∼6 keV, which is significantly higher than the ionization temperature (kT ∼4 keV) measured from the Fe K emission lines, assuming collisional equilibrium plasma. The spectrum did not show a hard power-law component above this energy range, unlike earlier detections with INTEGRAL and Suzaku. In the second NuSTAR observation, the X-ray flux above 5 keV declined gradually in ∼1 day. This result suggests that the WWC apex was gradually hidden behind the optically thick primary wind around conjunction.},
  language  = {en}
}
@article{Haugsbakken2015,
  author    = {Haugsbakken, Halvdan},
  title     = {The Student Learning Ecology},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82659},
  pages     = {151 -- 169},
  year      = {2015},
  abstract  = {Educational research on social media has showed that students use it for socialisation, personal communication, and informal learning. Recent studies have argued that students to some degree use social media to carry out formal schoolwork. This article gives an explorative account on how a small sample of Norwegian high school students use social media to self-organise formal schoolwork. This user pattern can be called a "student learning ecology", which is a user perspective on how participating students gain access to learning resources.},
  language  = {en}
}
@article{Hassler2015,
  author    = {Haßler, Gerda},
  title     = {'Communicating the past to the present'},
  series = {History and Philosophy of the Language Sciences},
  journal   = {History and Philosophy of the Language Sciences},
  editor    = {McElvenny, James},
  issn      = {2366-2409},
  year      = {2015},
  language  = {en}
}
@article{HeinzHomburger2015,
  author    = {Heinz, Wolfgang S. and Homburger, Zine},
  title     = {Die Rolle des UN-Hochkommissariats f{\"u}r Menschenrechte (OHCHR) im UN-Menschenrechtsschutz},
  series = {Konzepte f{\"u}r die Reform der Vereinten Nationen : 12. Potsdamer UNO-Konferenz am 28.Juni 2014},
  volume    = {2015},
  journal   = {Konzepte f{\"u}r die Reform der Vereinten Nationen : 12. Potsdamer UNO-Konferenz am 28.Juni 2014},
  number    = {11},
  editor    = {Zimmermann, Andreas},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-80177},
  pages     = {69 -- 98},
  year      = {2015},
  abstract  = {I. Gr{\"u}ndung, Aufgaben und Struktur des Hochkommissariats II. Zur Rolle des OHCHR im und gegen{\"u}ber dem Menschenrechtsrat III. Zu Erfolgschancen von Feldmissionen in eher schwierigen L{\"a}ndern: China, Russische F{\"o}deration, Afghanistan, Sudan und Kolumbien IV. Zur Frage der politischen Unabh{\"a}ngigkeit des OHCHR V. Schlussfolgerungen und Ausblick},
  language  = {de}
}
@article{HendrixKeppens2015,
  author    = {Hendrix, T. and Keppens, R.},
  title     = {Modelling colliding wind binaries in 2D},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88198},
  pages     = {279 -- 282},
  year      = {2015},
  abstract  = {We look at how the dynamics of colliding wind binaries (CWB) can be investigated in 2D, and how several parameters influence the dynamics of the small scale structures inside the colliding wind and the shocked regions, as well as in how the dynamics influence the shape of the collision region at large distances. The parameters we adopt are based on the binary system WR98a, one of the few Wolf-Rayet (WR) dusty pinwheels known.},
  language  = {en}
}
@article{Heyd2015,
  author    = {Heyd, Thomas},
  title     = {Ascensi{\´o}n al Teide de Alexander von Humboldt},
  series = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  volume    = {XVI},
  journal   = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  number    = {30},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-86956},
  pages     = {68 -- 77},
  year      = {2015},
  abstract  = {En este breve ensayo propongo que en la ascensi{\´o}n al Teide Alexander von Humboldt pudo adquirir una perspectiva integral, que le sirvi{\´o} como marco de comunicaci{\´o}n cient{\´i}fica para aunar la multitud de datos que se hab{\´i}a dispuesto a recoger en su breve estancia en la isla. M{\´a}s aun, de ah{\´i} en adelante este marco adem{\´a}s le servir{\´i}a para darle sentido de conjunto a las incontables y diversas informaciones que recoger{\´i}a en los restantes cinco a{\~n}os de viaje. Para poner en evidencia el enfoque de la visita a Tenerife de Humboldt, analizo su relato de la ascensi{\´o}n al Teide suponiendo que est{\´a} estructurado seg{\´u}n los relatos de viajes {\´e}picos y peregrinaciones.},
  language  = {es}
}
@misc{HeywoodJones2015,
  author    = {Heywood-Jones, David},
  title     = {Tobias Metzler: Tales of Three Cities. Urban Jewish Cultures in London, Berlin, and Paris (c. 1880-1940) (= J{\"u}dische Kultur, Bd. 28) / reviewed by David Heywood-Jones},
  series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  volume    = {21},
  journal   = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-331-2},
  issn      = {1614-6492},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-86301},
  pages     = {255 -- 259},
  year      = {2015},
  abstract  = {Reviewed work: Tobias Metzler: Tales of Three Cities. Urban Jewish Cultures in London, Berlin, and Paris (c. 1880-1940) (= J{\"u}dische Kultur, Bd. 28). Wiesbaden: Harrassowitz 2014. 412 S.},
  language  = {en}
}
@article{Hillier2015,
  author    = {Hillier, D. J.},
  title     = {Spectrum formation in Wolf-Rayet stars},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87669},
  pages     = {65 -- 70},
  year      = {2015},
  abstract  = {We highlight the basic physics that allows fundamental parameters, such as the effective temperature, luminosity, abundances, and mass-loss rate, of Wolf-Rayet (W-R) stars to be determined. Since the temperature deduced from the spectrum of a W-R star is an ionization temperature, a detailed discussion of the ionization structure of W-R winds, and how it is set, is given. We also provide an overview of line and continuum formation in W-R stars. Mechanisms that contribute to the strength of different emission lines, such as collisional excitation, radiative recombination, dielectronic recombination, and continuum uorescence, are discussed.},
  language  = {en}
}
@article{HoffmanLomax2015,
  author    = {Hoffman, J. L. and Lomax, J. R.},
  title     = {Structure and fate of binary WR stars},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87737},
  pages     = {85 -- 88},
  year      = {2015},
  abstract  = {Because most massive stars have been or will be affected by a companion during the course of their evolution, we cannot afford to neglect binaries when discussing the progenitors of supernovae and GRBs. Analyzing linear polarization in the emission lines of close binary systems allows us to probe the structures of these systems' winds and mass flows, making it possible to map the complex morphologies of the mass loss and mass transfer structures that shape their subsequent evolution. In Wolf-Rayet (WR) binaries, line polarization variations with orbital phase distinguish polarimetric signatures arising from lines that scatter near the stars from those that scatter far from the orbital plane. These far-scattering lines may form the basis for a "binary line-effect method" of identifying rapidly rotating WR stars (and hence GRB progenitor candidates) in binary systems.},
  language  = {en}
}
@article{Hoffmann2015,
  author    = {Hoffmann, Daniel},
  title     = {„Sie haben zweifellos Interessantes am Kreuz erlebt."},
  series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  volume    = {21},
  journal   = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-331-2},
  issn      = {1614-6492},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-85869},
  pages     = {165 -- 179},
  year      = {2015},
  abstract  = {Carl Einsteins Drama „Die schlimme Botschaft" (1921), das ihm einen Prozess wegen Gottesl{\"a}sterung einbrachte, steht mit seiner kritischen Haltung gegen{\"u}ber der christlichen Lehre von der Kreuzigung und Auferstehung im Trend einer seinerzeit von j{\"u}dischen Theologen gef{\"u}hrten Diskussion mit Adolf Harnacks Modernisierungsprojekt des Christentums. J{\"u}dische Theologen wie Joseph Eschelbacher entwarfen ein Judentum, das, anders als von Harnack dargestellt, bereits jene moderne Gestalt einer Religion erf{\"u}llt, die Harnack f{\"u}r das Christentum erst zu erreichen versuchte. Einsteins „vom Dogma abweichende[r] Standpunkt", der ihm vor Gericht von einem katholischen Geistlichen als Standpunkt eines dissidenten Juden vorgeworfen wurde, h{\"a}tte durchaus als Beitrag eines j{\"u}dischen Literaten zur Apologie des Judentums gelten k{\"o}nnen, wenn Einstein nicht selbst seine Glaubensbr{\"u}der im Verbund mit der von ihm abgelehnten b{\"u}rgerlichen Ideologie des kapitalistischen Marktes gesehen h{\"a}tte.},
  language  = {de}
}
@article{HurtienneSchroederSpannagel2015,
  author    = {Hurtienne, Dominik and Schroeder, Ulrik and Spannagel, Christian},
  title     = {IT EnGAGES!},
  series = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  volume    = {2015},
  journal   = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  number    = {9},
  editor    = {Schwill, Andreas and Schubert, Sigrid},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-80258},
  pages     = {27 -- 43},
  year      = {2015},
  abstract  = {Durch den Einsatz von Spielen und Spielelementen in Lernkontexten wird versucht, Lernende zur Besch{\"a}ftigung mit den Lerninhalten zu motivieren. Spielerische Elemente haben allerdings nicht nur positive motivationale Effekte: Sie k{\"o}nnen sich beispielsweise negativ auf die intrinsische Motivation auswirken, und auch nicht jeder Lernende spielt gerne. Um negativen Einfl{\"u}ssen von Gamification entgegenzuwirken, wurde ein Toolkit f{\"u}r adaptierbare Lernumgebungen entwickelt. Damit erzeugte Lernumgebungen erlauben es Studierenden, den Grad der Gamification selbst zu bestimmen, indem Spielelemente an- und abgeschaltet werden. Im Rahmen einer Anf{\"a}ngerprogrammiervorlesung wurden Lernspielaufgaben aus den existierenden, optionalen interaktiven eTests entwickelt und Studierenden als zus{\"a}tzliche Lerngelegenheit angeboten. Eine erste explorative Studie best{\"a}tigt die Vermutung, dass die Akzeptanz des adaptierbaren Lernspiels sehr hoch ist, es aber dennoch Studierende gibt, welche die Lernumgebung ohne Spielelemente durcharbeiten. Somit bietet adaptierbare Gamification verschiedenen Studierenden die M{\"o}glichkeit, sich zus{\"a}tzliche motivationale Anreize durch Zuschalten von Spielelementen zu verschaffen, ohne dabei zum Spielen „gen{\"o}tigt" zu werden.},
  language  = {de}
}
@article{Huefner2015,
  author    = {H{\"u}fner, Klaus},
  title     = {Konzepte f{\"u}r die Neustrukturierung des Systems der Vereinten Nationen},
  series = {Konzepte f{\"u}r die Reform der Vereinten Nationen : 12. Potsdamer UNO-Konferenz am 28.Juni 2014},
  volume    = {2015},
  journal   = {Konzepte f{\"u}r die Reform der Vereinten Nationen : 12. Potsdamer UNO-Konferenz am 28.Juni 2014},
  number    = {11},
  editor    = {Zimmermann, Andreas},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-80147},
  pages     = {9 -- 28},
  year      = {2015},
  abstract  = {I. Einleitung II. Zum Ergebnisdokument des Weltgipfels vom September 2005 III. Alle 10 Jahre ein neuer Vorschlag zur Charta-Revision? IV. Schlussbemerkungen V Literatur},
  language  = {de}
}
@article{JakoblewKeilWinkelnkemper2015,
  author    = {Jakoblew, Marcel and Keil, Reinhard and Winkelnkemper, Felix},
  title     = {Forschendes Lernen durch Semantisches Positionieren},
  series = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  volume    = {2015},
  journal   = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  number    = {9},
  editor    = {Schwill, Andreas and Schubert, Sigrid},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-80301},
  pages     = {109 -- 124},
  year      = {2015},
  abstract  = {Der Beitrag stellt das Konzept des Semantischen Positionierens als eine M{\"o}glichkeit vor, Grundformen des wissenschaftlichen Arbeitens und elementare Formen der diskursiven Auseinandersetzung zu vermitteln, ohne dass die Studierenden sich inhaltlich an der aktuellen Forschung beteiligen m{\"u}ssten. Die Umsetzung dieses Konzepts im Bachelorstudium der Informatik verdeutlicht, dass mit diesem Ansatz sowohl die Kompetenzen f{\"u}r den {\"U}bergang in den mehr forschungsgetriebenen Masterstudiengang als auch f{\"u}r die berufliche Wissensarbeit erworben werden k{\"o}nnen.},
  language  = {de}
}
@article{Jones2015,
  author    = {Jones, Anthony},
  title     = {ICT Competencies for School Students},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82663},
  pages     = {171 -- 179},
  year      = {2015},
  abstract  = {This paper discusses results from a small-scale research study, together with some recently published research into student perceptions of ICT for learning in schools, to consider relevant skills that do not appear to currently being taught. The paper concludes by raising three issues relating to learning with and through ICT that need to be addressed in school curricula and classroom teaching.},
  language  = {en}
}
@article{Kalas2015,
  author    = {Kalas, Ivan},
  title     = {Programming at Pre-primary and Primary Levels},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82587},
  pages     = {29 -- 31},
  year      = {2015},
  language  = {en}
}
@article{KanarekSharaFahertyetal.2015,
  author    = {Kanarek, G. and Shara, M. and Faherty, J. and Zurek, D. and Moffat, Anthony F. J.},
  title     = {New Galactic Wolf-Rayet Stars},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88448},
  pages     = {359},
  year      = {2015},
  abstract  = {Over the course of 6 months in 2013, we observed nearly 400 Wolf-Rayet candidates in the Galactic plane. Preliminary results from this dataset are presented.},
  language  = {en}
}
@article{KehrigVilchezPerezMonteroetal.2015,
  author    = {Kehrig, C. and V{\´i}lchez, J. M. and P{\´e}rez-Montero, E. and Iglesias-P{\´a}ramo, J. and Brinchmann, Jarle and Crowther, P. A. and Durret, F. and Kunth, D.},
  title     = {PopIII-star siblings in IZw18 and metal-poor WR galaxies unveiled from integral field spectroscopy},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87648},
  pages     = {55 -- 58},
  year      = {2015},
  abstract  = {Here, we highlight our recent results from the IFS study of Mrk178, the closest metal-poor WR galaxy, and of IZw18, the most metal-poor star-forming galaxy known in the local Universe. The IFS data of Mrk178 show the importance of aperture effects on the search for WR features, and the extent to which physical variations in the ISM properties can be detected. Our IFS data of IZw18 reveal its entire nebular HeIIλ4686-emitting region, and indicate for the very first time that peculiar, hot (nearly) metal-free ionizing stars (called here PopIII-star siblings) might hold the key to the HeII-ionization in IZw18.},
  language  = {en}
}
@article{Kluth2015,
  author    = {Kluth, Winfried},
  title     = {Rechtliche Rahmenbedingungen f{\"u}r interkommunale Kooperation im Schulsektor},
  series = {Schulen im kommunalen Bildungsmanagement},
  journal   = {Schulen im kommunalen Bildungsmanagement},
  editor    = {Bauer, Hartmut and B{\"u}chner, Christiane and Markmann, Friedrich},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88592},
  pages     = {83 -- 98},
  year      = {2015},
  language  = {de}
}
@article{KochiashviliBeradzeKochiashvilietal.2015,
  author    = {Kochiashvili, N. and Beradze, S. and Kochiashvili, I. and Natsvlishvili, R. and Vardosanidze, M.},
  title     = {New Photometric Observations of P Cygni},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88452},
  pages     = {360},
  year      = {2015},
  abstract  = {We present the results of the new photometric observations of the famous hypergiant PCygni. New observations were obtained in 2014 using the 48 cm Cassegrain telescope of the Abastumani Astrophysical Observatory, Georgia. We reveal some interesting behaviors of the B,V,R,I light curves, and also report new results on the periodicity of PCygni's variation. The latter result is based on the analysis of the photometric data (U,B,V filters) collected at the Abastumani Observatory between 1937 and 1983.},
  language  = {en}
}
@article{Koenigsberger2015,
  author    = {Koenigsberger, C.},
  title     = {HD5980},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87954},
  pages     = {171 -- 174},
  year      = {2015},
  abstract  = {HD5980 is a multiple system containing at least 3 very massive and luminous stars. Located in the Small Magellanic Cloud, it is an ideal system for studying the massive star structure and evolutionary processes in low-metallicity environments. Intensely observed over the past few decades, HD5980 is a treasure trove of information on stellar wind structure, on wind-wind collisions and on the formation of wind-blown circumstellar structures. In addition, its characteristics suggest that the eclipsing WR+LBV stars of the system are the product of quasihomogeneous chemical evolution, thus making them candidate pair production supernovae or GRB progenitors. This paper summarizes some of the outstanding results derived from half a century of observations and recent theoretical studies.},
  language  = {en}
}
@article{Kosuch2015,
  author    = {Kosuch, Carolin},
  title     = {„Ein Jude zog aus von Nazareth…"},
  series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  volume    = {21},
  journal   = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-331-2},
  issn      = {1614-6492},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-85848},
  pages     = {123 -- 140},
  year      = {2015},
  abstract  = {Der deutsch-j{\"u}dische Dichter und Anarchist Erich M{\"u}hsam (1878-1934) rekurrierte in seinem schriftstellerischen OEuvre wiederholt auf die Figur Jesus'. Im Versuch, diese Beziehungsgeschichte zu rekonstruieren und zu deuten, r{\"u}cken Einflussgeber aus dem Umfeld der literarischen Avantgarde Berlins sowie der Lebensreformbewegung in den Blick. In einer Verschr{\"a}nkung von quasireligi{\"o}ser Renaissance und Aufbruchstimmung hin zum ‚Neuen Menschen' war Jesus in diesen Zirkeln um die Jahrhundertwende ein beliebtes Motiv und pr{\"a}gte sich, vermittelt {\"u}ber Freundschaften und Wegmarken, auch in M{\"u}hsams Schreiben ein. Neben Kain ist es Jesus, der bei M{\"u}hsam zur den f{\"u}nften Stand revolutionierenden Lichtgestalt wird. In diese Bezugnahme spielen M{\"u}hsams konfliktreiches Verh{\"a}ltnis zu seinem Vater und dessen Assimilation an das deutsche B{\"u}rgertum mit hinein, das keineswegs g{\"a}nzlich jene aufgekl{\"a}rten Werte lebte, auf die es sich nominell berief: Statt Freiheit und Gleichheit pr{\"a}valierten neue Zw{\"a}nge, Begrenzungen und Ressentiments, wie M{\"u}hsam bemerkte. {\"U}ber Gustav Landauer fand er nicht nur zum Anarchismus, sondern auch zu einer neuen Sprache f{\"u}r die versch{\"u}ttete Tradition und pr{\"a}gte hier{\"u}ber seiner Jesusfigur sein Verst{\"a}ndnis eines rebellischen Judentums ein, das M{\"u}hsam selbst als Revolution{\"a}r verk{\"o}rperte.},
  language  = {de}
}
@article{KourniotisBonanosNajarro2015,
  author    = {Kourniotis, M. and Bonanos, A. and Najarro, F.},
  title     = {Accurate parameters of massive binaries in the Danks clusters},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87819},
  pages     = {121 -- 124},
  year      = {2015},
  abstract  = {We present results from our near-infrared spectroscopy with VLT/ISAAC of four, massive eclipsing binary systems in the young, heavily reddened, massive Danks clusters. We derive accurate fundamental parameters and the distance to these massive systems, which comprise of OIf+, WR and O-type stars. Our goal is to increase the sample of well-studied WR stars and constrain their physics by comparison with evolutionary models.},
  language  = {en}
}
@article{Kraft2015,
  author    = {Kraft, Tobias},
  title     = {Humboldts Hefte},
  series = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  volume    = {XVI},
  journal   = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  number    = {31},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  doi       = {10.18443/222},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88986},
  pages     = {49 -- 59},
  year      = {2015},
  abstract  = {Der 2013 gegl{\"u}ckte Ankauf der Amerikanischen Tageb{\"u}cher durch ein Konsortium {\"o}ffentlicher und privater Geldgeber hat es nicht nur erm{\"o}glicht, Alexander von Humboldts Reisemanuskripte zum ersten Mal einer breiten interessierten {\"O}ffentlichkeit vorzustellen, sondern wirft auch ein besonderer Licht auf die Geschichte ihrer Rezeption und Erforschung. Welche Phasen der Arbeit und Auswertung der Tageb{\"u}cher lassen sich nachzeichnen? Und an welchem Punkt steht die Humboldt-Forschung in dieser Frage heute?},
  language  = {de}
}
@article{KujathSchuetze2015,
  author    = {Kujath, Bertold and Sch{\"u}tze, Christopher},
  title     = {Evaluation der Lernwirksamkeit eines Lehrvideos zum informatischen Probleml{\"o}sen},
  series = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  volume    = {2015},
  journal   = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  number    = {9},
  editor    = {Schubert, Sigrid and Schwill, Andreas},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-84705},
  pages     = {143 -- 152},
  year      = {2015},
  abstract  = {Der folgende Artikel beschreibt die Evaluation eines Lehrvideos zum informatischen Probleml{\"o}sen, welches auf der Grundlage einer Vergleichsstudie mit starken und schwachen Probleml{\"o}sern entwickelt wurde. Beispielhaft wird in dem Film ein F{\"a}rbeproblem durch einen fiktiven Hochleister unter lautem Denken gel{\"o}st, die einzelnen Arbeitsschritte werden abschnittsweise kommentiert und erkl{\"a}rt. Ob dieses Lernkonzept von Studenten akzeptiert wird und sich durch Anschauen des Videos tats{\"a}chlich ein Lerneffekt einstellt, wurde durch eine Befragung und eine erste Vergleichsstudie untersucht.},
  language  = {de}
}
@article{Kueker2015,
  author    = {K{\"u}ker, Manfred},
  title     = {Magnetospheres of massive stars},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87864},
  pages     = {143 -- 146},
  year      = {2015},
  abstract  = {We study the interaction of line-driven winds from massive stars with the magnetic field rooted in these stars by carrying out numerical simulations using the Nirvana MHD code in 2D in spherical polar coordinates. The code's adaptive mesh refinement feature allows high spatial resolution across the whole simulation box. We study both O and Wolf-Rayet stars for a range of magnetic field strengths from weak to strong as measured by the confinement parameter. For weak fields our simulations show that the initially dipolar field opens up far away from the star and a thin disk-like structure forms in the equatorial plane of the magnetic field. For stronger fields the disk is disrupted close to the stellar surface and closed field lines persist at low latitudes. For very strong fields a pronounced magnetosphere forms where the gas is forced to move along the field lines and eventually falls back to the stellar surface.},
  language  = {en}
}
@article{Ladwig2015,
  author    = {Ladwig, Bernd},
  title     = {Warum manche Tiere Rechte haben - und wir nicht die einzigen sind},
  series = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen},
  volume    = {20},
  journal   = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen},
  number    = {2},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1434-2820},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-94900},
  pages     = {75 -- 86},
  year      = {2015},
  abstract  = {In diesem Text soll zweierlei gezeigt werden. Erstens, weil Menschen Rechte haben, gibt es wenigstens einige Tiere, die Rechte haben (I.). Zweitens, wir k{\"o}nnen die Rechte von Tieren nicht willk{\"u}rfrei auf die Art begrenzen, die wir selber bilden; Menschen sind nicht die einzigen Tiere, die Rechte haben (II.).},
  language  = {de}
}
@article{LangerSanyalGrassitellietal.2015,
  author    = {Langer, N. and Sanyal, D. and Grassitelli, L. and Sz{\´e}sci, D.},
  title     = {The stellar Eddington limit},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88121},
  pages     = {241 -- 244},
  year      = {2015},
  abstract  = {It is often assumed that when stars reach their Eddington limit, strong outflows are initiated, and that this happens only for extreme stellar masses. We discuss here that in models of up to 500 M⊙, the Eddington limit is never reached at the stellar surface. Instead, we argue that the Eddington limit is reached inside the stellar envelope in hydrogen-rich stars above ∼ 30 M⊙ and in Wolf-Rayet stars above ∼ 7 M⊙, with drastic effects for their struture and stability.},
  language  = {en}
}
@article{Lenhart2015,
  author    = {Lenhart, Markus Helmut},
  title     = {Jesus als Jude bei Maurycy Gottlieb und Marc Chagall},
  series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  volume    = {21},
  journal   = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien [21 (2015)] = Jesus in den J{\"u}dischen Kulturen des 19. und 20. Jahrhunderts},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-331-2},
  issn      = {1614-6492},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-85819},
  pages     = {87 -- 104},
  year      = {2015},
  abstract  = {Die j{\"u}dischen K{\"u}nstler Maurycy Gottlieb (1856-1879) und Marc Chagall (1887-1985) stellten Jesus als gl{\"a}ubigen Juden, eingebettet in die j{\"u}dische Umwelt seiner Zeit, dar. Der j{\"u}dische Jesus wird f{\"u}r sie zu einer Auseinandersetzung mit den j{\"u}dischen Wurzeln des Christentums und mit dem Antisemitismus, und sein Martyrium zu einem Symbol des j{\"u}dischen Leidens. Der vorliegende Aufsatz untersucht, wie ihre Bilder diese Botschaften transportieren und analysiert Kontinuit{\"a}ten und Br{\"u}che {\"u}ber einen langen Zeitraum hinweg.},
  language  = {de}
}
@article{LeonhardtKwiecienSchmetzetal.2015,
  author    = {Leonhardt, Thiemo and Kwiecien, Alexandra and Schmetz, Arno and Bellgardt, Martin and Naumann, Uwe},
  title     = {Studienabbruchsquote dauerhaft senken},
  series = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  volume    = {2015},
  journal   = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  number    = {9},
  editor    = {Schwill, Andreas and Schubert, Sigrid},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-80274},
  pages     = {61 -- 76},
  year      = {2015},
  abstract  = {Es wird ein umfassendes Mentoring Konzept im Studiengang Informatik an der RWTH Aachen vorgestellt, das den {\"U}bergang von der Schule zur Universit{\"a}t unterst{\"u}tzt und gleichzeitig beim Auftreten von Schwierigkeiten im Verlauf des Studiums effiziente und kompetente Beratung bietet. Das Programm erreicht durchg{\"a}ngig hohe Akzeptanzwerte bei den Studierenden trotz verpflichtender Teilnahme im ersten Semester. Die Wirksamkeit des Programms ist durch die zahlreichen einflussgebenden Variablen zwar rein quantitativ kaum messbar, die M{\"o}glichkeit auf organisatorische und fachliche Probleme eines Jahrgangs reagieren zu k{\"o}nnen sowie einen Einblick auf die Gr{\"u}nde f{\"u}r einen Studienabbruch zu bekommen, best{\"a}tigt aber die Notwendigkeit der Maßnahme.},
  language  = {de}
}
@article{LewinMcNicol2015,
  author    = {Lewin, Cathy and McNicol, Sarah},
  title     = {Supporting the Development of 21st Century Skills through ICT},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82672},
  pages     = {181 -- 198},
  year      = {2015},
  abstract  = {The growing impact of globalisation and the development of a 'knowledge society' have led many to argue that 21st century skills are essential for life in twenty-first century society and that ICT is central to their development. This paper describes how 21st century skills, in particular digital literacy, critical thinking, creativity, communication and collaboration skills, have been conceptualised and embedded in the resources developed for teachers in iTEC, a four-year, European project. The effectiveness of this approach is considered in light of the data collected through the evaluation of the pilots, which considers both the potential benefits of using technology to support the development of 21st century skills, but also the challenges of doing so. Finally, the paper discusses the learning support systems required in order to transform pedagogies and embed 21st century skills. It is argued that support is required in standards and assessment; curriculum and instruction; professional development; and learning environments.},
  language  = {en}
}
@article{Liermann2015,
  author    = {Liermann, A.},
  title     = {Evolution of Wolf-Rayet spectra},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87830},
  pages     = {129 -- 132},
  year      = {2015},
  abstract  = {Wolf-Rayet stars are important sources for the enrichment of the ISM with nuclear processed elements, UV photons and momentum. They are descendants of high-mass stars for which short lifetimes and transition times can hamper the spectral classification of the stars in their different evolutionary phases. The expanded stellar atmospheres of Wolf-Rayet stars can show spectra which seem inconsistent with the anticipated underlying evolution phase, for example in late hydrogen-burning WN stars and Of/WN transition stars. We present a sequence of synthetic spectra of the Potsdam Wolf-Rayet models based on the latest Geneva stellar evolution models. This will visualize the changes in stellar spectra over a full stellar lifetime. Direct comparison with observed stellar spectra, as well as the evolution of diagnostic line ratios will improve the connection of spectral classification and evolution phase.},
  language  = {en}
}
@article{Lundberg2015,
  author    = {Lundberg, Karin},
  title     = {Networking knowledge},
  series = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  volume    = {XVI},
  journal   = {HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies},
  number    = {30},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-86968},
  pages     = {78 -- 83},
  year      = {2015},
  abstract  = {Global citizenship and diversity are well-represented concepts in today's higher education. Learning outcomes and competencies are designed to sensitize students to the many cultural backgrounds of U.S. learning institutions. Nevertheless, true globality, as represented through diverse discourses and perspectives of the world, still seems neglected in curricula and course assignments. This article explores the possibilities offered through a new shared space in education where different forms of networked knowledge and multifaceted perspectives can build a global platform of exchange in a diverse student population. The universal science concept described by Alexander von Humboldt at the beginning of the 19th Century illuminates this intertwined approach to knowledge of the world, which has the potential to positively impact contemporary curricula and course design. Von Humboldt's writings emphasize inclusion and interplay among cultures and natural phenomena. By inviting our students to be active representatives of diverse discourses, these interconnecting links will become more transparent. In turn, productive forms of knowing about the world may enrich current learning objectives and thereby reflect a true global citizenship as it evolves in a new shared space of education. Keywords: global citizenship, plurality, diverse discourses, multicultural education.},
  language  = {en}
}
@article{LaengrichSchulze2015,
  author    = {L{\"a}ngrich, Matthias and Schulze, J{\"o}rg},
  title     = {Angewandte Output-Orientierung},
  series = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  volume    = {2015},
  journal   = {HDI 2014 : Gestalten von {\"U}berg{\"a}ngen},
  number    = {9},
  editor    = {Schwill, Andreas and Schubert, Sigrid},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-80299},
  pages     = {93 -- 107},
  year      = {2015},
  abstract  = {Erstsemester-Studierende sind mit den Anforderungen des Lehr-/ Lernprozess einer Universit{\"a}t oder Fachhochschule noch nicht vertraut. Ihre Erwartungen orientieren sich vielmehr an ihrer bisherigen Lerngeschichte (Abitur, Fachabitur, o. {\"a}.). Neben den fachlichen Anforderungen des ersten Semesters m{\"u}ssen die Studierenden also auch Ver{\"a}nderungen im Lehr-/Lernprozess erkennen und bew{\"a}ltigen. Es wird anhand einer Output-orientierten informatischen Lehrveranstaltung aufgezeigt, dass sich aus deren strengen Anforderungen der Messbarkeit klare Kompetenzbeschreibungen ergeben, die besonders dem Orientierungsbed{\"u}rfnis Erstsemester-Studierender entgegenkommen.},
  language  = {de}
}
@article{MaduraClementelGulletal.2015,
  author    = {Madura, T. I. and Clementel, N. and Gull, T. R. and Kruip, C. J. H. and Paardekooper, J.-P. and Icke, V.},
  title     = {3D hydrodynamical and radiative transfer modeling of η Carinae's colliding winds},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87930},
  pages     = {163 -- 166},
  year      = {2015},
  abstract  = {We present results of full 3D hydrodynamical and radiative transfer simulations of the colliding stellar winds in the massive binary system η Carinae. We accomplish this by applying the SimpleX algorithm for 3D radiative transfer on an unstructured Voronoi-Delaunay grid to recent 3D smoothed particle hydrodynamics (SPH) simulations of the binary colliding winds. We use SimpleX to obtain detailed ionization fractions of hydrogen and helium, in 3D, at the resolution of the original SPH simulations. We investigate several computational domain sizes and Luminous Blue Variable primary star mass-loss rates. We furthermore present new methods of visualizing and interacting with output from complex 3D numerical simulations, including 3D interactive graphics and 3D printing. While we initially focus on η Car, the methods employed can be applied to numerous other colliding wind (WR 140, WR 137, WR 19) and dusty `pinwheel' (WR 104, WR 98a) binary systems. Coupled with 3D hydrodynamical simulations, SimpleX simulations have the potential to help determine the regions where various observed time-variable emission and absorption lines form in these unique objects.},
  language  = {en}
}
@article{MagenheimNellesNeugebaueretal.2015,
  author    = {Magenheim, Johannes and Nelles, Wolfgang and Neugebauer, Jonas and Ohrndorf, Laura and Schaper, Niclas and Schubert, Sigrid},
  title     = {Expert Rating of Competence Levels in Upper Secondary Computer Science Education},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82683},
  pages     = {199 -- 216},
  year      = {2015},
  abstract  = {In the project MoKoM, which is funded by the German Research Foundation (DFG) from 2008 to 2012, a test instrument measuring students' competences in computer science was developed. This paper presents the results of an expert rating of the levels of students' competences done for the items of the instrument. At first we will describe the difficulty-relevant features that were used for the evaluation. These were deduced from computer science, psychological and didactical findings and resources. Potentials and desiderata of this research method are discussed further on. Finally we will present our conclusions on the results and give an outlook on further steps.},
  language  = {en}
}
@article{MagenheimSchubertSchapert2015,
  author    = {Magenheim, Johannes and Schubert, Sigrid and Schapert, Niclas},
  title     = {Modelling and Measurement of Competencies in Computer Science Education},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82592},
  pages     = {33 -- 57},
  year      = {2015},
  abstract  = {As a result of the Bologna reform of educational systems in Europe the outcome orientation of learning processes, competence-oriented descriptions of the curricula and competence-oriented assessment procedures became standard also in Computer Science Education (CSE). The following keynote addresses important issues of shaping a CSE competence model especially in the area of informatics system comprehension and object-oriented modelling. Objectives and research methodology of the project MoKoM (Modelling and Measurement of Competences in CSE) are explained. Firstly, the CSE competence model was derived based on theoretical concepts and then secondly the model was empirically examined and refined using expert interviews. Furthermore, the paper depicts the development and examination of a competence measurement instrument, which was derived from the competence model. Therefore, the instrument was applied to a large sample of students at the gymnasium's upper class level. Subsequently, efforts to develop a competence level model, based on the retrieved empirical results and on expert ratings are presented. Finally, further demands on research on competence modelling in CSE will be outlined.},
  language  = {en}
}
@article{MainaAngondiWaga2015,
  author    = {Maina, Anthony Gioko and Angondi, Enos Kiforo and Waga, Rosemary},
  title     = {How does the Implementation of a Literacy Learning Tool Kit influence Literacy Skill Acquisition?},
  series = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  journal   = {KEYCIT 2014 - Key Competencies in Informatics and ICT},
  number    = {7},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1868-0844},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-82856},
  pages     = {319 -- 326},
  year      = {2015},
  abstract  = {This study aimed at following how teachers transfer skills into results while using ABRA literacy software. This was done in the second part of the pilot study whose aim was to provide equity to control group teachers and students by exposing them to the ABRACADABRA treatment after the end of phase 1. This opportunity was used to follow the phase 1 teachers to see how the skills learned were being transformed into results. A standard three-day initial training and planning session on how to use ABRA to teach literacy was held at the beginning of each phase for ABRA teachers (phase 1 experimental and phase 2 delayed ABRA). Teachers were provided with teaching materials including a tentative ABRA curriculum developed to align with the Kenyan English Language requirements for year 1 and 3 students. Results showed that although there was no significant difference between the groups in vocabulary-related subscales which include word reading and meaning as well as sentence comprehension, students in ABRACADABRA classes improved their scores at a significantly higher rate than students in control classes in comprehension related scores. An average student in the ABRACADABRA group improved by 12 and 16 percentile points respectively compared to their counterparts in the control group.},
  language  = {en}
}
@misc{MardoukhiJeonMetzler2015,
  author    = {Mardoukhi, Yousof and Jeon, Jae-Hyung and Metzler, Ralf},
  title     = {Geometry controlled anomalous diffusion in random fractal geometries},
  series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  number    = {980},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-47486},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-474864},
  pages     = {30134 -- 30147},
  year      = {2015},
  abstract  = {We investigate the ergodic properties of a random walker performing (anomalous) diffusion on a random fractal geometry. Extensive Monte Carlo simulations of the motion of tracer particles on an ensemble of realisations of percolation clusters are performed for a wide range of percolation densities. Single trajectories of the tracer motion are analysed to quantify the time averaged mean squared displacement (MSD) and to compare this with the ensemble averaged MSD of the particle motion. Other complementary physical observables associated with ergodicity are studied, as well. It turns out that the time averaged MSD of individual realisations exhibits non-vanishing fluctuations even in the limit of very long observation times as the percolation density approaches the critical value. This apparent non-ergodic behaviour concurs with the ergodic behaviour on the ensemble averaged level. We demonstrate how the non-vanishing fluctuations in single particle trajectories are analytically expressed in terms of the fractal dimension and the cluster size distribution of the random geometry, thus being of purely geometrical origin. Moreover, we reveal that the convergence scaling law to ergodicity, which is known to be inversely proportional to the observation time T for ergodic diffusion processes, follows a power-law ∼T-h with h < 1 due to the fractal structure of the accessible space. These results provide useful measures for differentiating the subdiffusion on random fractals from an otherwise closely related process, namely, fractional Brownian motion. Implications of our results on the analysis of single particle tracking experiments are provided.},
  language  = {en}
}
@article{MarstonMauerhanMorrisetal.2015,
  author    = {Marston, A. P. and Mauerhan, J. and Morris, P. W. and Van Dyk, S.},
  title     = {Finding Wolf-Rayet Stars in the Milky Way},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87577},
  pages     = {27 -- 30},
  year      = {2015},
  abstract  = {The total population of Wolf-Rayet (WR) stars in the Galaxy is predicted by models to be as many as ~6000 stars, and yet the number of catalogued WR stars as a result of optical surveys was far lower than this (~200) at the turn of this century. When beginning our WR searches using infrared techniques it was not clear whether WR number predictions were too optimistic or whether there was more hidden behind interstellar and circumstellar extinction. During the last decade we pioneered a technique of exploiting the near- and mid-infrared continuum colours for individual point sources provided by large-format surveys of the Galaxy, including 2MASS and Spitzer/GLIMPSE, to pierce through the dust and reveal newly discovered WR stars throughout the Galactic Plane. The key item to the colour discrimination is via the characteristic infrared spectral index produced by the strong winds of the WR stars, combined with dust extinction, which place WR stars in a relatively depopulated area of infrared colour-colour diagrams. The use of the Spitzer/GLIMPSE 8µm and, more recently, WISE 22µm fluxes together with cross-referencing with X-ray measurements in selected Galactic regions have enabled improved candidate lists that increased our confirmation success rate, achieved via follow-up infrared and optical spectroscopy. To date a total of 102 new WR stars have been found with many more candidates still available for follow-up. This constitutes an addition of ~16\% to the current inventory of 642 Galactic WR stars. In this talk we review our methods and provide some new results and a preliminary review of their stellar and interstellar medium environments. We provide a roadmap for the future of this search, including statistical modeling, and what we can add to star formation and high mass star evolution studies.},
  language  = {en}
}
@article{Martens2015,
  author    = {Martens, Jens},
  title     = {Vom Konsultativstatus zu Stakeholder-Partnerschaften},
  series = {Konzepte f{\"u}r die Reform der Vereinten Nationen : 12. Potsdamer UNO-Konferenz am 28.Juni 2014},
  volume    = {2015},
  journal   = {Konzepte f{\"u}r die Reform der Vereinten Nationen : 12. Potsdamer UNO-Konferenz am 28.Juni 2014},
  number    = {11},
  editor    = {Zimmermann, Andreas},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-80163},
  pages     = {49 -- 67},
  year      = {2015},
  abstract  = {Die Beziehungen zwischen den Vereinten Nationen und nichtstaatlichen Akteuren haben seit den 1990er Jahren einen radikalen Wandel erlebt. Nach der Rio-Konferenz {\"u}ber Umwelt und Entwicklung 1992 stand in den Vereinten Nationen zun{\"a}chst die Frage im Vordergrund, wie der gewachsenen Bedeutung der Nichtregierungsorganisationen (NGOs) in der Arbeit und den Strukturen der Weltorganisation Rechnung getragen werden k{\"o}nnte. Seit Ende der 1990er Jahre dominierten innerhalb der Vereinten Nationen und einiger ihrer Spezialorgane und Sonderorganisationen zunehmend die Bem{\"u}hungen, Privatunternehmen und ihre Interessenvertreter aktiver in die Arbeit der Vereinten Nationen zu integrieren. Dies geschah zum einen in Form unterschiedlichster bilateraler Kontakte und Kooperationsvorhaben zwischen Unternehmen und UN-Akteuren, zum anderen im Rahmen von Dialogveranstaltungen und gemeinsamen Initiativen von Regierungen, zwischenstaatlichen Gremien, Wirtschaftsvertretern und NGOs, f{\"u}r die im Folgeprozess der Rio-Konferenz der Begriff der Multistakeholder-Partnerschaften gepr{\"a}gt wurde. Der folgende Beitrag nimmt diese Entwicklung kritisch unter die Lupe. Er zeichnet im Zeitraffer nach, wie sich die Beziehungen zwischen den Vereinten Nationen und nichtstaatlichen Akteuren gewandelt haben, beschreibt das Ausmaß und die Bandbreite der neuen Partnerschaftsans{\"a}tze, er{\"o}rtert Risiken und Nebenwirkungen dieses Paradigmenwechsels in der internationalen Politik und skizziert zum Schluss, welche Konsequenzen sich daraus f{\"u}r die Vereinten Nationen abzeichnen.},
  language  = {de}
}
@article{MaryevaPolcaroRossietal.2015,
  author    = {Maryeva, O. and Polcaro, V. F. and Rossi, C. and Viotti, R.},
  title     = {Modeling of spectral variability of Romano's star},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88462},
  pages     = {361},
  year      = {2015},
  abstract  = {We present results of investigation of spectral variability of one of the most interesting massive stars, Romano's star (M33/V532 or GR290), located in the M33 galaxy. Brightness of the star changes together with its spectral class, which varies from WN11 to WN8. Using CMFGEN code we estimated parameters of stellar atmosphere and found that during last ten years bolometric luminosity of the star changed synchronously with stellar magnitude. Our calculations argue in favor of the hypothesis of a post-LBV status of GR290.},
  language  = {en}
}
@article{MasseyNeugentMorrell2015,
  author    = {Massey, P. and Neugent, K. F. and Morrell, N. I.},
  title     = {Finding Wolf-Rayet Stars in the Local Group},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87592},
  pages     = {35 -- 42},
  year      = {2015},
  abstract  = {We summarize past and current surveys for WRs among the Local Group galaxies, empha- sizing both the why and how. Such studies are invaluable for helping us learn about massive star evolution, and for providing sensitive tests of the stellar evolution models. But for such surveys to be useful, the completeness limits must be well understood. We illustrate that point by following the "evolution" of the observed WC/WN ratio in nearby galaxies. We end by examining our new survey for WR stars in the Magellanic Clouds, which has revealed a new type of WN star, never before seen.},
  language  = {en}
}
@article{McClellandEldridge2015,
  author    = {McClelland, L. A. S. and Eldridge, J. J.},
  title     = {Helium stars},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88010},
  pages     = {197 -- 200},
  year      = {2015},
  abstract  = {There are outstanding problems in trying to reproduce the observed nature of Wolf-Rayet stars from theoretical stellar models. We have investigated the effects of uncertainties, such as composition and mass-loss rate, on the evolution and structure of Wolf-Rayet stars and their lower mass brethren. We find that the normal Conti scenario needs to be altered, with different WR types being due to different initial masses as well as different stages of evolution.},
  language  = {en}
}
@article{MesaDelgadoEstebanGarciaRojas2015,
  author    = {Mesa-Delgado, A. and Esteban, C. and Garc{\´i}a-Rojas, J.},
  title     = {Ring Nebulae},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-88299},
  pages     = {325 -- 328},
  year      = {2015},
  abstract  = {Preliminary results are presented from spectroscopic data in the optical range of the Galactic ring nebulae NGC 6888, G2:4+1:4, RCW 58 and Sh2-308. Deep observations with long exposure times were carried out at the 6.5m Clay Telescope and at the 10.4m Gran Telescopio Canarias. In NGC 6888, recombination lines of C ii, O ii and N ii are detected with signal-to-noise ratios higher than 8. The chemical content of NGC 6888 is discussed within the chemical enrichment predicted by evolution models of massive stars. For all nebulae, a forthcoming work will content in-depth details about observations, analysis and final results (Esteban et al. 2015, in prep.).},
  language  = {en}
}
@article{MeynetGeorgyMaederetal.2015,
  author    = {Meynet, G. and Georgy, C. and Maeder, A. and Ekstr{\"o}m, S. and Groh, J. H. and Barblan, F. and Song, H. F. and Eggenberger, P.},
  title     = {Physics of massive stars relevant for the modeling of Wolf-Rayet populations},
  series = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  journal   = {Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.-5. June 2015},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-87971},
  pages     = {183 -- 188},
  year      = {2015},
  abstract  = {Key physical ingredients governing the evolution of massive stars are mass losses, convection and mixing in radiative zones. These effects are important both in the frame of single and close binary evolution. The present paper addresses two points: 1) the differences between two families of rotating models, i.e. the family of models computed with and without an efficient transport of angular momentum in radiative zones; 2) The impact of the mass losses in single and in close binary models.},
  language  = {en}
}