@article{Ette2011, author = {Ette, Ottmar}, title = {Un episodio en la vida del pintor viajero : mala literatura y escritura fulminante en Cesar Aira}, year = {2011}, language = {es} } @book{OPUS4-32394, title = {Political essay on the Island of Cuba : a critical Edition}, editor = {Kutzinski, Vera M. and Ette, Ottmar}, publisher = {The Univ. of Chicago Press}, address = {Chicago}, isbn = {978-3-0-226-46567-8}, pages = {519 S.}, year = {2011}, language = {en} } @book{AarsethManovichMaeyraeetal.2011, author = {Aarseth, Espen and Manovich, Lev and M{\"a}yr{\"a}, Frans and Salen, Katie and Wolf, Mark J. P.}, title = {DIGAREC Keynote-Lectures 2009/10}, editor = {G{\"u}nzel, Stephan and Liebe, Michael and Mersch, Dieter}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-115-8}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-49780}, publisher = {Universit{\"a}t Potsdam}, pages = {159}, year = {2011}, abstract = {The sixth volume of the DIGAREC Series holds the contributions to the DIGAREC Keynote-Lectures given at the University of Potsdam in the winter semester 2009/10. With contributions by Mark J.P. Wolf (Concordia University Wisconsin), Espen Aarseth (Center for Computer Games Research, IT University of Copenhagen), Katie Salen (Parsons New School of Design, New York), Laura Ermi and Frans M{\"a}yr{\"a} (University of Tampere), and Lev Manovich (University of Southern California, San Diego).}, language = {de} } @article{GuenzelLiebeMersch2011, author = {G{\"u}nzel, Stephan and Liebe, Michael and Mersch, Dieter}, title = {Introduction}, series = {DIGAREC series}, journal = {DIGAREC series}, number = {6}, issn = {1867-6219}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-49797}, pages = {6 -- 17}, year = {2011}, language = {de} } @article{SpijkermandeCastroGaedke2011, author = {Spijkerman, Elly and de Castro, Francisco and Gaedke, Ursula}, title = {Independent Colimitation for Carbon Dioxide and Inorganic Phosphorus}, series = {PLoS one}, volume = {6}, journal = {PLoS one}, number = {12}, publisher = {PLoS}, address = {San Fransisco}, issn = {1932-6203}, doi = {10.1371/journal.pone.0028219}, pages = {12}, year = {2011}, abstract = {Simultaneous limitation of plant growth by two or more nutrients is increasingly acknowledged as a common phenomenon in nature, but its cellular mechanisms are far from understood. We investigated the uptake kinetics of CO(2) and phosphorus of the algae Chlamydomonas acidophila in response to growth at limiting conditions of CO(2) and phosphorus. In addition, we fitted the data to four different Monod-type models: one assuming Liebigs Law of the minimum, one assuming that the affinity for the uptake of one nutrient is not influenced by the supply of the other (independent colimitation) and two where the uptake affinity for one nutrient depends on the supply of the other (dependent colimitation). In addition we asked whether the physiological response under colimitation differs from that under single nutrient limitation. We found no negative correlation between the affinities for uptake of the two nutrients, thereby rejecting a dependent colimitation. Kinetic data were supported by a better model fit assuming independent uptake of colimiting nutrients than when assuming Liebigs Law of the minimum or a dependent colimitation. Results show that cell nutrient homeostasis regulated nutrient acquisition which resulted in a trade-off in the maximum uptake rates of CO(2) and phosphorus, possibly driven by space limitation on the cell membrane for porters for the different nutrients. Hence, the response to colimitation deviated from that to a single nutrient limitation. In conclusion, responses to single nutrient limitation cannot be extrapolated to situations where multiple nutrients are limiting, which calls for colimitation experiments and models to properly predict growth responses to a changing natural environment. These deviations from single nutrient limitation response under colimiting conditions and independent colimitation may also hold for other nutrients in algae and in higher plants.}, language = {en} } @article{LukasSperfeldWacker2011, author = {Lukas, Marcus and Sperfeld, Erik and Wacker, Alexander}, title = {Growth Rate Hypothesis does not apply across colimiting conditions cholesterol limitation affects phosphorus homoeostasis of an aquatic herbivore}, series = {Functional ecology : an official journal of the British Ecological Society}, volume = {25}, journal = {Functional ecology : an official journal of the British Ecological Society}, number = {6}, publisher = {Wiley-Blackwell}, address = {Malden}, issn = {0269-8463}, doi = {10.1111/j.1365-2435.2011.01876.x}, pages = {1206 -- 1214}, year = {2011}, abstract = {1. Herbivores show stronger control of element homoeostasis than primary producers, which can lead to constraints in carbon and nutrient transfer efficiencies from plants to animals. Insufficient dietary phosphorus (P) availability can cause reduced body P contents along with lower growth rates of animals, leading to a positive relationship between growth and body P. 2. We examined how a second limiting food component in combination with dietary P limitation influences growth and P homoeostasis of a herbivore and how this colimitation influences the hypothesized positive correlation between body P content and growth rates. Therefore, we investigated the responses in somatic growth and P stoichiometry of Daphnia magna raised on a range of diets with different amounts of P and the sterol cholesterol. 3. Somatic growth rates of D. magna increased asymptotically with increasing P as well as with increasing cholesterol availability. The body P content increased with increasing dietary P and stabilized at high dietary P availability. The observed plasticity in D. magna's P stoichiometry became stronger with increasing cholesterol availability, i.e. with decreasing colimitation by cholesterol. 4. At P-limiting conditions, the positive correlation between body P content and growth rate, as predicted by the growth rate hypothesis (GRH) applied to the within-species level, declined with increasing cholesterol limitation and disappeared entirely when cholesterol was not supplied. Thus, even when Daphnia shows no growth response owing to strong limitation by the colimiting nutrient, the body P content may vary substantially, calling into question the unconditional use of herbivores' P content as predictor of a potential P limitation in nature. 5. The observed interaction between dietary P and cholesterol on Daphnia's growth and stoichiometry can be used as a conceptual framework of how colimiting essential nutrients affect herbivore homoeostasis, and provide further insights into the applicability of the GRH within a consumer species.}, language = {en} } @article{Spijkerman2011, author = {Spijkerman, Elly}, title = {The expression of a carbon concentrating mechanism in Chlamydomonas acidophila under variable phosphorus, iron, and CO2 concentrations}, series = {Photosynthesis research}, volume = {109}, journal = {Photosynthesis research}, number = {1-3}, publisher = {Springer}, address = {Dordrecht}, issn = {0166-8595}, doi = {10.1007/s11120-010-9607-z}, pages = {179 -- 189}, year = {2011}, abstract = {The CO2 acquisition was analyzed in Chlamydomonas acidophila at pH 2.4 in a range of medium P and Fe concentrations and at high and low CO2 condition. The inorganic carbon concentrating factor (CCF) was related to cellular P quota (Q(p)), maximum CO2-uptake rate by photosynthesis (V-max; O-2), half saturation constant for CO2 uptake (K-0.5), and medium Fe concentration. There was no effect of the medium Fe concentration on the CCF. The CCF increased with increasing Q(p) in both high and low CO2 grown algae, but maximum Q(p) was 6-fold higher in the low CO2 cells. In high CO2 conditions, the CCF was low, ranging between 0.8 and 3.5. High CCF values up to 9.1 were only observed in CO2-limited cells, but P- and CO2-colimited cells had a low CCF. High CCF did not relate with a low K-0.5 as all CO2-limited cells had a low K-0.5 (<4 mu M CO2). High Ci-pools in cells with high Qp suggested the presence of an active CO2-uptake mechanism. The CCF also increased with increasing V-max; O-2 which reflect an adaptation to the nutrient in highest demand (CO2) under balanced growth conditions. It is proposed that the size of the CCF in C. acidophila is more strongly related to porter density for CO2 uptake (reflected in V-max; O-2) and less- to high-affinity CO2 uptake (low K-0.5) at balanced growth. In addition, high CCF can only be realized with high Q(p).}, language = {en} } @article{SpijkermanWacker2011, author = {Spijkerman, Elly and Wacker, Alexander}, title = {Interactions between P-limitation and different C conditions on the fatty acid composition of an extremophile microalga}, series = {Extremophiles : life under extreme conditions}, volume = {15}, journal = {Extremophiles : life under extreme conditions}, number = {5}, publisher = {Springer}, address = {Tokyo}, issn = {1431-0651}, doi = {10.1007/s00792-011-0390-3}, pages = {597 -- 609}, year = {2011}, abstract = {The extremophilic microalga Chlamydomonas acidophila inhabits very acidic waters (pH 2-3.5), where its growth is often limited by phosphorus (P) or colimited by P and inorganic carbon (CO(2)). Because this alga is a major food source for predators in acidic habitats, we studied its fatty acid content, which reflects their quality as food, grown under a combination of P-limited and different carbon conditions (either mixotrophically with light + glucose or at high or low CO(2), both without glucose). The fatty acid composition largely depended on the cellular P content: stringent P-limited cells had a higher total fatty acid concentration and had a lower percentage of polyunsaturated fatty acids. An additional limitation for CO(2) inhibited this decrease, especially reflected in enhanced concentrations of 18:3(9,12,15) and 16:4(3,7,10,13), resulting in cells relatively rich in polyunsaturated fatty acids under colimiting growth conditions. The percentage of polyunsaturated to total fatty acid content was positively related with maximum photosynthesis under all conditions applied. The two factors, P and CO(2), thus interact in their effect on the fatty acid composition in C. acidophila, and colimited cells P-limited algae can be considered a superior food source for herbivores because of the high total fatty acid content and relative richness in polyunsaturated fatty acids.}, language = {en} } @article{SperfeldWacker2011, author = {Sperfeld, Erik and Wacker, Alexander}, title = {Temperature- and cholesterol-induced changes in eicosapentaenoic acid limitation of Daphnia magna determined by a promising method to estimate growth saturation thresholds}, series = {Limnology and oceanography}, volume = {56}, journal = {Limnology and oceanography}, number = {4}, publisher = {Wiley}, address = {Waco}, issn = {0024-3590}, doi = {10.4319/lo.2011.56.4.1273}, pages = {1273 -- 1284}, year = {2011}, abstract = {We present data on eicosapentaenoic acid (EPA)-limited growth responses of Daphnia magna under different temperatures and different dietary cholesterol availabilities to assess how EPA growth saturation thresholds depend on changing environmental conditions. D. magna was raised on gradients of dietary EPA at 15 degrees C and 20 degrees C with high cholesterol supply and at 20 degrees C with low and high cholesterol supply in laboratory experiments. A new method was applied to estimate EPA growth saturation thresholds on the basis of fitted saturation curves using bootstrapped data. The EPA threshold at which 75\% and 90\% of maximum growth was reached ranged from 0.7 to 1.6 mu g EPA (mg dietary C)(-1) and 2.0 to 4.9 mu g EPA (mg dietary C)(-1), respectively. Previously reported EPA concentrations in natural seston of many different lakes suggest that the thresholds measured here indicate a frequent potential for at least moderate EPA limitation in nature. Furthermore, the calculated EPA thresholds were higher in treatments of low compared with high temperature and higher in treatments of low compared with high cholesterol availability. The EPA-dependent growth responses were more strongly affected by temperature than by cholesterol availability. Our results suggest that EPA growth saturation thresholds for a particular Daphnia species probably vary in nature under different environmental conditions.}, language = {en} } @article{Mersch2011, author = {Mersch, Dieter}, title = {Fraktale R{\"a}ume und multiple Aktionen : {\"U}berlegungen zur Orientierung in Komplexen medialen Umgebungen}, isbn = {978-3-8376-1404-6}, year = {2011}, language = {de} } @article{Mersch2011, author = {Mersch, Dieter}, title = {Philosophien neuer Musik}, isbn = {978-3-7957-0752-1}, year = {2011}, language = {de} } @article{Mersch2011, author = {Mersch, Dieter}, title = {Aspects of Visual Epistemology : on the "Logic" of the Iconic}, year = {2011}, language = {en} } @article{Mersch2011, author = {Mersch, Dieter}, title = {Aspekte visueller Epistemologie : zur "Logik" des Ikonischen}, isbn = {978-3-86838-115-3}, year = {2011}, language = {de} } @article{Mersch2011, author = {Mersch, Dieter}, title = {Res medii : von der Sache des Medialen}, isbn = {978-3-8376-1181-6}, year = {2011}, language = {de} } @article{Mersch2011, author = {Mersch, Dieter}, title = {Ikonizit{\"a}t : Theorien des Bildlichen nach Wittgenstein}, isbn = {978-3- 7705-5079-1}, year = {2011}, language = {de} } @article{Mersch2011, author = {Mersch, Dieter}, title = {Bildlichkeit: Splitter, Fragmente}, isbn = {978-3-16-150821-9}, year = {2011}, language = {de} } @article{GottwaldMitchellReich2011, author = {Gottwald, Georg A. and Mitchell, Lewis and Reich, Sebastian}, title = {Controlling overestimation of error covariance in ensemble kalman filters with sparse observations a variance-limiting kalman filter}, series = {Monthly weather review}, volume = {139}, journal = {Monthly weather review}, number = {8}, publisher = {American Meteorological Soc.}, address = {Boston}, issn = {0027-0644}, doi = {10.1175/2011MWR3557.1}, pages = {2650 -- 2667}, year = {2011}, abstract = {The problem of an ensemble Kalman filter when only partial observations are available is considered. In particular, the situation is investigated where the observational space consists of variables that are directly observable with known observational error, and of variables of which only their climatic variance and mean are given. To limit the variance of the latter poorly resolved variables a variance-limiting Kalman filter (VLKF) is derived in a variational setting. The VLKF for a simple linear toy model is analyzed and its range of optimal performance is determined. The VLKF is explored in an ensemble transform setting for the Lorenz-96 system, and it is shown that incorporating the information of the variance of some unobservable variables can improve the skill and also increase the stability of the data assimilation procedure.}, language = {en} } @book{BalderjahnSpecht2011, author = {Balderjahn, Ingo and Specht, G{\"u}nter}, title = {Einf{\"u}hrung in die Betriebswirtschaftslehre}, edition = {6}, publisher = {Sch{\"a}ffer-Poeschel}, address = {Stuttgart}, isbn = {978-3-7910-3096-8}, publisher = {Universit{\"a}t Potsdam}, pages = {297}, year = {2011}, abstract = {Basiswissen BWL - pr{\"a}gnant und verst{\"a}ndlich vermittelt. Das Lehrbuch vermittelt Wirtschaftswissenschaftlern, angehenden Wirtschaftsingenieuren und -informatikern sowie Nebenfachstudierenden aus dem technischen Bereich die wichtigsten Grundlagen der BWL. Die 6. Auflage wurde umfassend {\"u}berarbeitet, an die aktuelle Gesetzeslage angepasst und inhaltlich erweitert. Lernziele, Beispiele, Kontrollfragen und Aufgaben inklusive L{\"o}sungen erleichtern das selbstst{\"a}ndige Lernen. Das optimierte Layout sorgt f{\"u}r mehr {\"U}bersichtlichkeit.}, language = {de} } @book{KleinwaechterKraemer2011, author = {Kleinw{\"a}chter, Lutz and Kr{\"a}mer, Raimund}, title = {Der Aufstand des Jahres 1432 : Aktuelle Umbr{\"u}che im Nahen Osten und die Weltpolitik}, series = {WeltTrends Spezial}, volume = {1}, journal = {WeltTrends Spezial}, editor = {Kleinw{\"a}chter, Lutz and Kr{\"a}mer, Raimund}, publisher = {Welttrends}, address = {Potsdam}, issn = {2193-0627}, pages = {8}, year = {2011}, abstract = {Die j{\"u}ngsten Unruhen in der arabischen Welt haben eine jahrzehntelange Periode politischer Stagnation beendet. Bei der anstehenden staatlichen Reorganisation werden sowohl Milit{\"a}rs als auch islamistische Bewegungen eine wichtige Rolle spielen. Infolge der Umst{\"u}rze verschieben sich nicht nur regionale Kr{\"a}fteverh{\"a}ltnisse, sondern auch die Einflussm{\"o}glichkeiten der Weltm{\"a}chte im Nahen Osten. Die USA und der Westen insgesamt verlieren an Relevanz und m{\"u}ssen ihre Nahostpolitik auf ein neues Fundament stellen. Das machtpolitische Vakuum in dem energie- und sicherheitspolitisch bedeutsamen Raum aber werden neue Akteure wie China und die T{\"u}rkei f{\"u}llen.}, language = {de} } @book{Ersil2011, author = {Ersil, Wilhelm}, title = {Eine Wirtschaftsregierung f{\"u}r die Europ{\"a}ische Union}, series = {WeltTrends Spezial}, volume = {2}, journal = {WeltTrends Spezial}, publisher = {Welttrends}, address = {Potsdam}, issn = {2193-0627}, pages = {6}, year = {2011}, language = {de} } @book{Muetzenich2011, author = {M{\"u}tzenich, Rolf}, title = {Renaissance oder Ende der nuklearen Weltordnung?}, series = {WeltTrends Spezial}, volume = {5}, journal = {WeltTrends Spezial}, publisher = {WeltTrends e.V}, address = {Potsdam}, isbn = {978-3-941880-33-7}, issn = {2193-0627}, pages = {16}, year = {2011}, abstract = {In Stanley Kubricks Film von 1964 lernten wir, die Bombe zu lieben. Heute, 66 Jahre nach der ersten nuklearen Detonation, haben wir uns mit dem Wissen um ihre absolute Zerst{\"o}rungskraft arrangiert. In einer multipolaren Welt scheint die atomare W{\"a}hrung jedoch an Wert zu verlieren. Ist die Vision einer nuklearwaffenfreien Zukunft also nur ein Traum oder k{\"o}nnen wir lernen, auf die Bombe zu verzichten? Rolf M{\"u}tzenich, MdB und außenpolitischer Sprecher der SPD-Bundestagsfraktion, hat sich dieser Frage angenommen.}, language = {de} } @article{Stadler2011, author = {Stadler, Heike}, title = {Der B{\"u}rger entscheidet mit}, series = {BuB : Forum f{\"u}r Bibliothek und Information 63 (2011) 6}, volume = {63}, journal = {BuB : Forum f{\"u}r Bibliothek und Information 63 (2011) 6}, number = {6}, publisher = {Bock + Herchen}, address = {Bad Honnef}, pages = {450 -- 453}, year = {2011}, abstract = {»Warum erregt der geplante Abriss eines Bahnhofs die Nation, w{\"a}hrend gegen das hundertfache Sterben von Bibliotheken immer nur ein paar Stimmen laut werden? Wo sind die Wutb{\"u}rger, wenn man sie braucht?«, {\"u}berlegte sich hierzulande Tilman Spreckelsen.1 Die Kernfrage lautet also: Stehen die B{\"u}rger eigentlich hinter der Bibliothek? Ob und wie die B{\"u}rgerschaft f{\"u}r ihre {\"O}ffentliche Bibliothek entscheidet, wenn sie entscheiden darf, wird im vorliegenden Aufsatz thematisiert. Ergebnisse von B{\"u}rgerbegehren und B{\"u}rgerentscheiden stehen dabei im Fokus, da b{\"u}rgerschaftliches Engagement bei diesen Mitwirkungsinstrumenten besonders gefragt ist und es gleichzeitig kommunalpolitische Folgen haben kann. Am Beispiel von Stuttgart 21 wird dar{\"u}ber hinaus der Fragestellung nachgegangen, wie sich eine {\"O}ffentliche Bibliothek zu Sachverhalten positioniert, die (nicht nur) kommunalpolitisch brisant sind.}, language = {de} } @article{Stadler2011, author = {Stadler, Heike}, title = {Porto Alegre und Christchurch als Vorbild}, series = {BuB : Forum f{\"u}r Bibliothek und Information 63 (2011) 3}, volume = {63}, journal = {BuB : Forum f{\"u}r Bibliothek und Information 63 (2011) 3}, number = {3}, publisher = {Bock + Herchen}, address = {Bad Honnef}, pages = {197}, year = {2011}, language = {de} } @techreport{OPUS4-5497, title = {Was machen Verwaltungsmanager wirklich? : Explorative Ergebnisse eines Lehrforschungsprojekts}, editor = {Kroll, Alexander and Siegel, John Philipp}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-54526}, year = {2011}, abstract = {Dieses Sonderheft der Schriftenreihe des Lehrstuhls f{\"u}r Public Management pr{\"a}sentiert ausgew{\"a}hlte Ergebnisse eines Lehrforschungsprojektes. Dabei wurde in Anlehnung an Mintzbergs Managementforschung die Frage gestellt, wie F{\"u}hrungskr{\"a}fte in der Verwaltung tats{\"a}chlich ihre Organisationen steuern. Das Sonderheft enth{\"a}lt die explorativen Befunde aus drei empirischen Studien, die von Teilnehmern und Teilnehmerinnen des Seminars durchgef{\"u}hrt wurden.}, language = {de} } @phdthesis{Heine2011, author = {Heine, Moreen}, title = {Transfer von E-Government-L{\"o}sungen : Wirkungen und Strategien}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-54155}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {Der E-Government-Fortschritt wird nach wie vor durch redundante Entwicklungsaktivit{\"a}ten und isolierte, wenig interoperable L{\"o}sungen gehemmt. Die Herausforderung liegt weniger in der Entwicklung und Einf{\"u}hrung leistungsstarker Informationssysteme, sondern in der Verbreitung bestehender L{\"o}sungen. Die Arbeit identifiziert m{\"o}gliche Strategien f{\"u}r den Transfer von E-Government-L{\"o}sungen zwischen Verwaltungen gleicher wie auch verschiedener f{\"o}deraler Ebene. Es werden Konzepte zur Diffusion von Innovationen, zum Technologie- wie auch Politiktransfer herangezogen. Weiter werden drei umfangreiche Fallstudien vorgestellt. Sie f{\"u}hren zu transferhemmenden wie auch f{\"o}rdernden Faktoren und somit zu Gestaltungsoptionen f{\"u}r erfolgreiche Transferprozesse unter den vielf{\"a}ltigen Rahmenbedingungen im {\"o}ffentlichen Sektor.}, language = {de} } @misc{BaeumlerDiehlvonEssenetal.2011, author = {B{\"a}umler, Jelena and Diehl, David and von Essen, Viktor and Finke, Bernd and Kashgar, Maral and Kaspers, Birte and Lorz, Alexander and Ludewig, Manuela and R{\"o}mer, Lutz and Sauer, Heiko and Zimmermann, Andreas}, title = {MenschenRechtsMagazin : Informationen | Meinungen | Analysen}, volume = {16}, number = {1}, editor = {Gunnarsson, Logi and Klein, Eckart and Zimmermann, Andreas}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1434-2820}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-52546}, year = {2011}, abstract = {Aus dem Inhalt: - Kinderrechte ohne Vorbehalt - Die Folgen der unmittelbaren Anwendbarkeit des - Kindeswohlvorrangs nach der UN-Kinderrechtskonvention - Wohin steuert der UN-Menschenrechtsrat? Stand und Perspektiven des Review-Prozesses - Das erste Urteil des Afrikanischen Gerichtshofs f{\"u}r Menschen- und V{\"o}lkerrechte}, language = {de} } @phdthesis{Boeche2011, author = {Boeche, Corrado}, title = {Chemical gradients in the Milky Way from unsupervised chemical abundances measurements of the RAVE spectroscopic data set}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-52478}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {The present thesis was born and evolved within the RAdial Velocity Experiment (RAVE) with the goal of measuring chemical abundances from the RAVE spectra and exploit them to investigate the chemical gradients along the plane of the Galaxy to provide constraints on possible Galactic formation scenarios. RAVE is a large spectroscopic survey which aims to observe spectroscopically ~10^6 stars by the end of 2012 and measures their radial velocities, atmospheric parameters and chemical abundances. The project makes use of the UK Schmidt telescope at Australian Astronomical Observatory (AAO) in Siding Spring, Australia, equipped with the multiobject spectrograph 6dF. To date, RAVE collected and measured more than 450,000 spectra. The precision of the chemical abundance estimations depends on the reliability of the atomic and atmosphere parameters adopted (in particular the oscillator strengths of the absorption lines and the effective temperature, gravity, and metallicity of the stars measured). Therefore we first identified 604 absorption lines in the RAVE wavelength range and refined their oscillator strengths with an inverse spectral analysis. Then, we improved the RAVE stellar parameters by modifying the RAVE pipeline and the spectral library the pipeline rely on. The modifications removed some systematic errors in stellar parameters discovered during this work. To obtain chemical abundances, we developed two different processing pipelines. Both of them perform chemical abundances measurements by assuming stellar atmospheres in Local Thermodynamic Equilibrium (LTE). The first one determines elements abundances from equivalent widths of absorption lines. Since this pipeline showed poor sensibility on abundances relative to iron, it has been superseded. The second one exploits the chi^2 minimization technique between observed and model spectra. Thanks to its precision, it has been adopted for the creation of the RAVE chemical catalogue. This pipeline provides abundances with uncertains of about ~0.2dex for spectra with signal-to-noise ratio S/N>40 and ~0.3dex for spectra with 20>S/N>40. For this work, the pipeline measured chemical abundances up to 7 elements for 217,358 RAVE stars. With these data we investigated the chemical gradients along the Galactic radius of the Milky Way. We found that stars with low vertical velocities |W| (which stay close to the Galactic plane) show an iron abundance gradient in agreement with previous works (~-0.07\$ dex kpc^-1) whereas stars with larger |W| which are able to reach larger heights above the Galactic plane, show progressively flatter gradients. The gradients of the other elements follow the same trend. This suggests that an efficient radial mixing acts in the Galaxy or that the thick disk formed from homogeneous interstellar matter. In particular, we found hundreds of stars which can be kinetically classified as thick disk stars exhibiting a chemical composition typical of the thin disk. A few stars of this kind have already been detected by other authors, and their origin is still not clear. One possibility is that they are thin disk stars kinematically heated, and then underwent an efficient radial mixing process which blurred (and so flattened) the gradient. Alternatively they may be a transition population" which represents an evolutionary bridge between thin and thick disk. Our analysis shows that the two explanations are not mutually exclusive. Future follow-up high resolution spectroscopic observations will clarify their role in the Galactic disk evolution.}, language = {en} } @book{PohlenzSchubarthSpecketal.2011, author = {Pohlenz, Philipp and Schubarth, Wilfried and Speck, Karsten and Seidel, Andreas and Winter, Martin and Heine, Christoph and Kleinfeld, Merle and Sarrar, Lea and Gemsa, Charlotte and Wendland, Mirko and Schlumm, Katharina and Lehmann, Uta and Kummerow, Udo and Bastian, Laura and Kamm, Caroline and Niproschke, Saskia and Sochadse, Lascha and Kotzur, Katharina and Hebert, Sebastian and Voigt, Frank and Kopp, Andrea}, title = {Nach Bologna: Praktika im Studium - Pflicht oder K{\"u}r?}, editor = {Schubarth, Wilfried and Speck, Karsten and Seidel, Andreas}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-123-3}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-51033}, publisher = {Universit{\"a}t Potsdam}, pages = {iii, 339}, year = {2011}, abstract = {Mit dem vorliegenden Band „Nach Bologna: Praktika im Studium - Pflicht oder K{\"u}r? Empirische Analysen und Empfehlungen f{\"u}r die Hochschulpraxis" von Wilfried Schubarth, Karsten Speck und Andreas Seidel wird die Reihe „Potsdamer Beitr{\"a}ge zur Lehrevaluation" unter neuem Titel und ver{\"a}nderter inhaltlicher Schwerpunktsetzung fortgef{\"u}hrt. Die Umbenennung in „Potsdamer Beitr{\"a}ge zur Hochschulforschung" versteht sich als ein Schritt hin zu einer thematischen {\"O}ffnung der Reihe f{\"u}r die verschiedensten Felder der Hochschulforschung. Der vorliegende Band widmet sich einem der zentralen Reformziele von Bologna: der Frage des Praxis- und Berufsbezugs und dabei insbesondere den Praxisphasen im Studium. Mit der Bologna-Reform werden im bildungspolitischen Bereich sehr vielf{\"a}ltige strukturelle und inhaltliche Ziele verfolgt. Das Ziel dieses Bandes besteht deshalb darin, empirische Forschungen zu Praxisbez{\"u}gen und Praxisphasen im Studium vorzustellen, diese in den Kontext aktueller Debatten um Studienqualit{\"a}t und Studienreform zu stellen sowie Folgerungen f{\"u}r die Gestaltung von Praxisphasen abzuleiten. Inhaltliche Schwerpunkte bilden das BMBF-Forschungsprojekt ProPrax und die Praxisphasen im Lehramtsstudium. Die Beitr{\"a}ge dieses Bandes gehen aus einem gleichnamigen Workshop hervor, der am 1. Oktober 2010 in Potsdam stattfand.}, language = {de} } @article{EndersMuellerTopping2011, author = {Enders, J{\"o}rg and M{\"u}ller, Reto and Topping, Peter M.}, title = {On Type-I singularities in Ricci flow}, series = {Communications in analysis and geometry}, volume = {19}, journal = {Communications in analysis and geometry}, number = {5}, publisher = {International Press of Boston}, address = {Somerville}, issn = {1019-8385}, pages = {905 -- 922}, year = {2011}, abstract = {We define several notions of singular set for Type-I Ricci flows and show that they all coincide. In order to do this, we prove that blow-ups around singular points converge to nontrivial gradient shrinking solitons, thus extending work of Naber [15]. As a by-product we conclude that the volume of a finite-volume singular set vanishes at the singular time. We also define a notion of density for Type-I Ricci flows and use it to prove a regularity theorem reminiscent of White's partial regularity result for mean curvature flow [22].}, language = {en} } @phdthesis{Bueltel2011, author = {B{\"u}ltel, Nadine}, title = {Starmanager : Medienprominenz, Reputation und Verg{\"u}tung von Top-Managern}, series = {Unternehmerisches Personalmanagement}, journal = {Unternehmerisches Personalmanagement}, publisher = {Gabler Verlag / Springer Fachmedien Wiesbaden GmbH Wiesbaden}, address = {Wiesbaden}, isbn = {978-3-8349-2821-4}, doi = {10.1007/978-3-8349-6195-2}, pages = {XXII, 490 S. : graph. Darst.}, year = {2011}, abstract = {Top-Manager stehen seit einigen Jahren verst{\"a}rkt im Visier der Medien. Durch die mediale Aufmerksamkeit erlangen sie einen Prominentenstatus, der in der angloamerikanischen Managementforschung zu schillernden Bezeichnungen wie Celebrity CEO oder Superstar CEO f{\"u}hrt. Nadine B{\"u}ltel widmet sich in ihrer Arbeit diesem neuartigen Star- Ph{\"a}nomen von Top-Managern und untersucht die Ursachen und Auswirkungen ihrer medialen Prominenz. Sie analysiert, wie Manager eine Starreputation aufbauen und welche Rolle die Medien hierbei spielen. Im Mittelpunkt steht dabei auch die Frage, ob und warum Starmanager eine h{\"o}here Verg{\"u}tung erhalten als ihre weniger prominenten Kollegen.}, language = {de} } @misc{Eulenfeld2011, type = {Master Thesis}, author = {Eulenfeld, Sophie}, title = {Gemeinschaftsbildung im Exil: Chancen und Gefahren des Zusammenlebens am Beispiel der Colonia Dignidad in Chile}, doi = {10.25932/publishup-51962}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-519622}, school = {Universit{\"a}t Potsdam}, pages = {III, 108}, year = {2011}, abstract = {In vorliegender Arbeit werden die Gefahren und Chancen des gemeinschaftlichen Zusammenlebens im Exil am Beispiel der ehemaligen Colonia Dignidad in Chile analysiert. Die Colonia Dignidad (dt.: Kolonie der W{\"u}rde) wurde 1961 von Mitgliedern einer deutschen Sekte im Zentrum des Landes, ca. 400 km s{\"u}dlich von Santiago entfernt, gegr{\"u}ndet. Nach außen pr{\"a}sentierte sich die Gemeinschaft als gl{\"u}ckliche und zufriedene deutsche Enklave, die ihre heimatlichen Traditionen und Br{\"a}uche im Ausland weiterhin pflegt. Mit dem Ende der Milit{\"a}rdiktatur unter Augusto Pinochet 1990 und dem damit verbundenen Wegfall der politischen R{\"u}ckendeckung der Gemeinschaft, begann die chilenische Justiz die schon l{\"a}nger bestehenden Vorw{\"u}rfe gegen den damaligen Sektenf{\"u}hrer Paul Sch{\"a}fer, u. a. wegen Kindesmissbrauchs und Folter an chilenischen Oppositionellen w{\"a}hrend der Milit{\"a}rdiktatur, zu untersuchen. Dem chilenischen Haftbefehl acht Jahre sp{\"a}ter entzog sich Paul Sch{\"a}fer durch seine Flucht nach Argentinien. Die zur{\"u}ckbleibenden Mitglieder der Colonia Dignidad waren aufgrund des einsetzenden Zerfalls der alten Gemeinschaftsordnung gezwungen, sich ein neues Gemeinschaftskonzept zu erarbeiten, eines, in dem die bisher so dominante F{\"u}hrerfigur fehlte. Sowohl das Gemeinschaftsleben in der Colonia Dignidad zwischen 1961 und 1998 als auch das Zusammenleben in der heutigen Villa Baviera ab 1998 wird anhand der Theorien zur Gemeinschaftsforschung von Ferdinand T{\"o}nnies, Georg Vobruba, Zygmunt Baumann, Matthias Grundmann und Stephan Drucks analysiert. Im Findungsprozess eines neuen Gemeinschaftskonzeptes waren die Mitglieder der ehemaligen Colonia Dignidad gezwungen, sich mit der Vergangenheit auseinanderzusetzen. In diesem Zusammenhang wird der Frage nachgegangen, inwiefern eine Aufarbeitung der Vergangenheit (memoria) im kulturwissenschaftlichen und psychologischen Sinne stattfand bzw. stattfindet und wenn ja, wie sich diese gestaltete bzw. gestaltet. Hierzu wird untersucht, welche staatlichen Maßnahmen zur Unterst{\"u}tzung des Neuanfangs der Gemeinschaft getroffen wurden und welchen Erfolg diese Maßnahmen hatten. Basierend auf den daraus gewonnenen Resultaten und der aktuellen Selbstdarstellung der Villa Baviera in ihrer Webpr{\"a}senz, wird das neue Gemeinschaftskonzept der ehemaligen Colonia Dignidad auf die Chancen des Zusammenlebens hin analysiert. Weiterf{\"u}hrend werden Konzepte zum kollektiven Ged{\"a}chtnis untersucht, von dem „Familienged{\"a}chtnis" auf ein „Gemeinschaftsged{\"a}chtnis" {\"u}bertragen und mit der Frage nach der konstruktiven memoria innerhalb der Villa Baviera verbunden. Abschließend wird der Frage nachgegangen, welche positiven Aspekte des Gemeinschaftslebens einer intentionalen Gemeinschaft auf das Gemeinschaftsleben der Villa Baviera {\"u}bertragen werden k{\"o}nnten.}, language = {de} } @book{Hummel2011, author = {Hummel, Detlev}, title = {Deutsche Kapitalbeteiligungsgesellschaften im Umfeld der globalen Finanzkrise 2008/2009}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-117-2}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-50100}, publisher = {Universit{\"a}t Potsdam}, pages = {vii, 64}, year = {2011}, abstract = {Der vorliegende Beitrag kn{\"u}pft an die in Potsdam seit 2001 durchgef{\"u}hrte Langzeitstudie an und untersucht die aktuelle Situation auf dem formellen Beteiligungsmarkt in Deutschland nach dem Ausbruch der Finanzkrise. Neben den allgemeinen Gegebenheiten des Marktes werden vor allem die Finanzierungsbedingungen sowie das Investitionsverhalten einzelner Beteiligungsgesellschaften analysiert. In den Jahren 2008 - 2009 zeigt sich einerseits eine weitestgehend unver{\"a}nderte Struktur der Refinanzierungsquellen. Privatpersonen und Banken sowie der {\"o}ffentliche Sektor nehmen weiterhin einen hohen Stellenwert ein. Andererseits werden deutliche Ver{\"a}nderungen der strukturellen Merkmale, wie auch im Investitionsverhalten einzelner Beteiligungsgesellschaften deutlich. Besonders auff{\"a}llig f{\"u}r die Branche sind das Rationalisierungsbestreben beim Einsatz von Investmentmanagern sowie die zunehmende Sp{\"a}tphasenspezialisierung. Aus dem festgestellten Konsolidierungs- und Reifeprozess erw{\"a}chst die Herausforderung und offene Frage, wie der Markt eine solche strukturelle Angebotsl{\"u}cke im Fr{\"u}hphasensegment begegnen will. Auch das Einwerben neuer Finanzmittel sowie die aktuellen Exit-Bedingungen werden in der vorliegenden Studie kritisch beleuchtet. Als ein reizvolles Instrument zur Reduzierung der aufgezeigten Problemfelder wird dabei die aktuell unterentwickelte Syndizierung von Beteiligungsinvestitionen angesehen. Die effizientere Ausgestaltung derartiger Finanzierungsstrukturen sollte dazu beitragen, dass das private Beteiligungskapital k{\"u}nftig st{\"a}rker bei der Transformation betrieblicher Forschung und Entwicklung zum Einsatz gelangt.}, language = {de} } @phdthesis{ValverdeSerrano2011, author = {Valverde Serrano, Clara}, title = {Self-assembly behavior in hydrophilic block copolymers}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-54163}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {Block copolymers are receiving increasing attention in the literature. Reports on amphiphilic block copolymers have now established the basis of their self-assembly behavior: aggregate sizes, morphologies and stability can be explained from the absolute and relative block lengths, the nature of the blocks, the architecture and also solvent selectiveness. In water, self-assembly of amphiphilic block copolymers is assumed to be driven by the hydrophobic. The motivation of this thesis is to study the influence on the self-assembly in water of A b B type block copolymers (with A hydrophilic) of the variation of the hydrophilicity of B from non-soluble (hydrophobic) to totally soluble (hydrophilic). Glucose-modified polybutadiene-block-poly(N-isopropylacrylamide) copolymers were prepared and their self-assembly behavior in water studied. The copolymers formed vesicles with an asymmetric membrane with a glycosylated exterior and poly(N-isopropylacrylamide) on the inside. Above the low critical solution temperature (LCST) of poly(N-isopropylacrylamide), the structure collapsed into micelles with a hydrophobic PNIPAM core and glycosylated exterior. This collapse was found to be reversible. As a result, the structures showed a temperature-dependent interaction with L-lectin proteins and were shown to be able to encapsulate organic molecules. Several families of double hydrophilic block copolymers (DHBC) were prepared. The blocks of these copolymers were biopolymers or polymer chimeras used in aqueous two-phase partition systems. Copolymers based on dextran and poly(ethylene glycol) blocks were able to form aggregates in water. Dex6500-b-PEG5500 copolymer spontaneously formed vesicles with PEG as the "less hydrophilic" barrier and dextran as the solubilizing block. The aggregates were found to be insensitive to the polymer's architecture and concentration (in the dilute range) and only mildly sensitive to temperature. Variation of the block length, yielded different morphologies. A longer PEG chain seemed to promote more curved aggregates following the inverse trend usually observed in amphiphilic block copolymers. A shorter dextran promoted vesicular structures as usually observed for the amphiphilic counterparts. The linking function was shown to have an influence of the morphology but not on the self-assembly capability in itself. The vesicles formed by dex6500-b-PEG5500 showed slow kinetics of clustering in the presence of Con A lectin. In addition both dex6500-b-PEG5500 and its crosslinked derivative were able to encapsulate fluorescent dyes. Two additional dextran-based copolymers were synthesized, dextran-b-poly(vinyl alcohol) and dextran-b-poly(vinyl pyrrolidone). The study of their self-assembly allowed to conclude that aqueous two-phase systems (ATPS) is a valid source of inspiration to conceive DHBCs capable of self-assembling. In the second part the principle was extended to polypeptide systems with the synthesis of a poly(N-hydroxyethylglutamine)-block-poly(ethylene glycol) copolymer. The copolymer that had been previously reported to have emulsifying properties was able to form vesicles by direct dissolution of the solid in water. Last, a series of thermoresponsive copolymers were prepared, dextran-b-PNIPAMm. These polymers formed aggregates below the LCST. Their structure could not be unambiguously elucidated but seemed to correspond to vesicles. Above the LCST, the collapse of the PNIPAM chains induced the formation of stable objects of several hundreds of nanometers in radius that evolved with increasing temperature. The cooling of these solution below LCST restored the initial aggregates. This self-assembly of DHBC outside any stimuli of pH, ionic strength, or temperature has only rarely been described in the literature. This work constituted the first formal attempt to frame the phenomenon. Two reasons were accounted for the self-assembly of such systems: incompatibility of the polymer pairs forming the two blocks (enthalpic) and a considerable solubility difference (enthalpic and entropic). The entropic contribution to the positive Gibbs free energy of mixing is believed to arise from the same loss of conformational entropy that is responsible for "the hydrophobic effect" but driven by a competition for water of the two blocks. In that sense this phenomenon should be described as the "hydrophilic effect".}, language = {en} } @phdthesis{Jiang2011, author = {Jiang, Yuan}, title = {Precursor phases in non-classical crystallization}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-52460}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {The main objective of this thesis is to understand molecular crystallization as a multistep process with or without polymeric additives, including transient liquid-liquid phase separation, nanocrystal nucleation within the dense phase, and subsequent nanocrystal self-assembly or self-organization in sequence. The thesis starts with a quaternary model system, containing DL-Glutamic acid (Glu), polyethyleneimine (PEI), water, and EtOH, for the understanding of multistep precipitation of Glu with PEI as an additive. The experiments were performed by mixing Glu-PEI aqueous solution with a non-solvent EtOH. First, the phase diagram of the quaternary system is determined, obtaining precipitate, coacervates, or homogeneous mixtures by varying Glu/PEI w/w and water/EtOH v/v. Coacervation is observed to occur over a wide range of Glu/PEI with various volumes. The composition of coacervates is conveniently characterized by nuclear magnetic resonance spectroscopy. The observed coacervates are thermodynamically stable phases rich in solute, which is different from metastable polymer-induced liquid precursors. The combination of atomic force microscopy, small angle scattering, and ξ-potential measurements confirms the coexistence of monomers and Glu/PEI complexes and the aggregation of complexes in Glu-PEI-water systems. This suggests that there might be a direct structural transformation between the Glu-PEI complexes in aqueous solution and the metastable liquid precursors in a water-EtOH mixture. The multistep mechanism of Glu precipitation with PEI as an additive is investigated thereafter. The combination of stopped flow and small angle scattering demonstrates that the initially formed liquid precursors pass through an alteration of growth and coalescence. Combined with results from optical microscopy and scanning electron microscopy, the nucleation of nanoplatelets happens within each liquid precursor droplet, and nanoplatelets reorient themselves and self-organize into a radial orientation in the crystalline microspheres. The recipe was then extended to the precipitation of organics in other oppositely charged amino acid-polyelectrolyte systems. After the success in preparing hierarchical microspheres in solution, the similar recipe can be extended to the preparation of patterned thin films on substrate. By dipping a quaternary DL-Lys·HCl (Lys)-polyacrylic acid (PAA)-water-EtOH dispersion on a hydrophilic slide, the fast evaporation process of the volatile solvent EtOH is responsible for the homogeneous nucleation of NPs. Then, the following complete evaporation causes the mesocrystallization of a continuous spherulitic thin film along the receding line of the liquid, which again transforms into a mesocrystalline thin film. Furthermore, annealing is used to optimize the property of mesocrystalline thin films. As evaporation is a non-equilibrium process, it can be used to tune the kinetics of crystallization. Therefore, hierarchical or periodical thin films are obtainable by starting the evaporation from microspheres recrystallization, obtaining mesocrystalline thin films with 4 hierarchy levels. The results reveal that evaporation provides an easy but effective way for the formation of patterned structures via the positioning of NPs after their fast nucleation, resulting in different kinds of patterns by controlling the concentration of NPs, solvent evaporation rate, and other physical forces. Non-classical crystallization is not limited to crystallizations with polymeric additives. We also observed the nucleation and growth of a new molecular layer on the growing DL-Glu·H2O crystals from a supersaturated mother liquor by using an in-situ atomic force microscopy (AFM), where the nucleation and growth of a molecular layer proceed via amorphous nanoparticle (NP) attachment and relaxation process before the observation of the growth of a newly formed molecular layer. NP attachment to the crystal surface is too fast to observe by using in-situ AFM. The height shrinkage of NPs, combined to the structural transformation from 3D amorphous NPs to 2D crystalline layer, is observed during the relaxation process. The nucleation and growth of a newly formed molecular layer from NP relaxation is contradictory to the classical nucleation theory, which hypothesizes that nuclei show the same crystallographic properties as a bulk crystal. The formation of a molecular layer by NP attachment and relaxation rather than attachment of single molecules provides a different picture from the currently held classical nucleation and growth theory regarding the growth of single crystals from solution.}, language = {de} } @phdthesis{Kraupner2011, author = {Kraupner, Alexander}, title = {Neuartige Synthese magnetischer Nanostrukturen: Metallcarbide und Metallnitride der {\"U}bergangsmetalle Fe/Co/Ni}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-52314}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {Magnetische Nanopartikel bieten ein großes Potential, da sie einerseits die Eigenschaften ihrer Bulk-Materialien besitzen und anderseits, auf Grund ihrer Gr{\"o}ße, {\"u}ber komplett unterschiedliche magnetische Eigenschaften verf{\"u}gen k{\"o}nnen; Superparamagnetismus ist eine dieser Eigenschaften. Die meisten etablierten Anwendungen magnetischer Nanopartikel basieren heutzutage auf Eisenoxiden. Diese bieten gute magnetische Eigenschaften, sind chemisch relativ stabil, ungiftig und lassen sich auf vielen Synthesewegen relativ einfach herstellen. Die magnetischen Eigenschaften der Eisenoxide sind materialabh{\"a}ngig aber begrenzt, weshalb nach anderen Verbindungen mit besseren Eigenschaften gesucht werden muss. Eisencarbid (Fe3C) kann eine dieser Verbindungen sein. Dieses besitzt vergleichbare positive Eigenschaften wie Eisenoxid, jedoch viel bessere magnetische Eigenschaften, speziell eine h{\"o}here S{\"a}ttigungsmagnetisierung. Bis jetzt wurde Fe3C haupts{\"a}chlich in Gasphasenabscheidungsprozessen synthetisiert oder als Nebenprodukt bei der Synthese von Kohlenstoffstrukturen gefunden. Eine Methode, mit der gezielt Fe3C-Nanopartikel und andere Metallcarbide synthetisiert werden k{\"o}nnen, ist die „Harnstoff-Glas-Route". Neben den Metallcarbiden k{\"o}nnen mit dieser Methode auch die entsprechenden Metallnitride synthetisiert werden, was die breite Anwendbarkeit der Methode unterstreicht. Die „Harnstoff-Glas-Route" ist eine Kombination eines Sol-Gel-Prozesses mit einer anschließenden carbothermalen Reduktion/Nitridierung bei h{\"o}heren Temperaturen. Sie bietet den Vorteil einer einfachen und schnellen Synthese verschiedener Metallcarbide/nitride. Der Schwerpunkt in dieser Arbeit lag auf der Synthese von Eisencarbiden/nitriden, aber auch Nickel und Kobalt wurden betrachtet. Durch die Variation der Syntheseparameter konnten verschiedene Eisencarbid/nitrid Nanostrukturen synthetisiert werden. Fe3C-Nanopartikel im Gr{\"o}ßenbereich von d = 5 - 10 nm konnten, durch die Verwendung von Eisenchlorid, hergestellt werden. Die Nanopartikel weisen durch ihre geringe Gr{\"o}ße superparamagnetische Eigenschaften auf und besitzen, im Vergleich zu Eisenoxid Nanopartikeln im gleichen Gr{\"o}ßenbereich, eine h{\"o}here S{\"a}ttigungsmagnetisierung. Diese konnten in fortf{\"u}hrenden Experimenten erfolgreich in ionischen Fl{\"u}ssigkeiten und durch ein Polymer-Coating, im w{\"a}ssrigen Medium, dispergiert werden. Desweiteren wurde durch ein Templatieren mit kolloidalem Silika eine mesopor{\"o}se Fe3C-Nanostruktur hergestellt. Diese konnte erfolgreich in der katalytischen Spaltung von Ammoniak getestet werden. Mit der Verwendung von Eisenacetylacetonat konnten neben Fe3C-Nanopartikeln, nur durch Variation der Reaktionsparameter, auch Fe7C3- und Fe3N-Nanopartikel synthetisiert werden. Speziell f{\"u}r die Fe3C-Nanopartikel konnte die S{\"a}ttigungsmagnetisierung, im Vergleich zu den mit Eisenchlorid synthetisierten Nanopartikeln, nochmals erh{\"o}ht werden. Versuche mit Nickelacetat f{\"u}hrten zu Nickelnitrid (Ni3N) Nanokristallen. Eine zus{\"a}tzliche metallische Nickelphase f{\"u}hrte zu einer Selbstorganisation der Partikel in Scheiben-{\"a}hnliche {\"U}berstrukturen. Mittels Kobaltacetat konnten, in Sph{\"a}ren aggregierte, metallische Kobalt Nanopartikel synthetisiert werden. Kobaltcarbid/nitrid war mit den gegebenen Syntheseparametern nicht zug{\"a}nglich.}, language = {de} } @phdthesis{Kopetzki2011, author = {Kopetzki, Daniel}, title = {Exploring hydrothermal reactions : from prebiotic synthesis to green chemistry}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-52581}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {In this thesis chemical reactions under hydrothermal conditions were explored, whereby emphasis was put on green chemistry. Water at high temperature and pressure acts as a benign solvent. Motivation to work under hydrothermal conditions was well-founded in the tunability of physicochemical properties with temperature, e.g. of dielectric constant, density or ion product, which often resulted in surprising reactivity. Another cornerstone was the implementation of the principles of green chemistry. Besides the use of water as solvent, this included the employment of a sustainable feedstock and the sensible use of resources by minimizing waste and harmful intermediates and additives. To evaluate the feasibility of hydrothermal conditions for chemical synthesis, exemplary reactions were performed. These were carried out in a continuous flow reactor, allowing for precise control of reaction conditions and kinetics measurements. In most experiments a temperature of 200 °C in combination with a pressure of 100 bar was chosen. In some cases the temperature was even raised to 300 °C. Water in this subcritical range can also be found in nature at hydrothermal vents on the ocean floor. On the primitive earth, environments with such conditions were however present in larger numbers. Therefore we tested whether biologically important carbohydrates could be formed at high temperature from the simple, probably prebiotic precursor formaldehyde. Indeed, this formose reaction could be carried out successfully, although the yield was lower compared to the counterpart reaction under ambient conditions. However, striking differences regarding selectivity and necessary catalysts were observed. At moderate temperatures bases and catalytically active cations like Ca2+ are necessary and the main products are hexoses and pentoses, which accumulate due to their higher stability. In contrast, in high-temperature water no catalyst was necessary but a slightly alkaline solution was sufficient. Hexoses were only formed in negligible amounts, whereas pentoses and the shorter carbohydrates accounted for the major fraction. Amongst the pentoses there was some preference for the formation of ribose. Even deoxy sugars could be detected in traces. The observation that catalysts can be avoided was successfully transferred to another reaction. In a green chemistry approach platform chemicals must be produced from sustainable resources. Carbohydrates can for instance be employed as a basis. They can be transformed to levulinic acid and formic acid, which can both react via a transfer hydrogenation to the green solvent and biofuel gamma-valerolactone. This second reaction usually requires catalysis by Ru or Pd, which are neither sustainable nor low-priced. Under hydrothermal conditions these heavy metals could be avoided and replaced by cheap salts, taking advantage of the temperature dependence of the acid dissociation constant. Simple sulfate was recognized as a temperature switchable base. With this additive high yield could be achieved by simultaneous prevention of waste. In contrast to conventional bases, which create salt upon neutralization, a temperature switchable base becomes neutral again when cooled down and thus can be reused. This adds another sustainable feature to the high atom economy of the presented hydrothermal synthesis. In a last study complex decomposition pathways of biomass were investigated. Gas chromatography in conjunction with mass spectroscopy has proven to be a powerful tool for the identification of unknowns. It was observed that several acids were formed when carbohydrates were treated with bases at high temperature. This procedure was also applied to digest wood. Afterwards it was possible to fermentate the solution and a good yield of methane was obtained. This has to be regarded in the light of the fact that wood practically cannot be used as a feedstock in a biogas factory. Thus the hydrothermal pretreatment is an efficient means to employ such materials as well. Also the reaction network of the hydrothermal decomposition of glycine was investigated using isotope-labeled compounds as comparison for the unambiguous identification of unknowns. This refined analysis allowed the identification of several new molecules and pathways, not yet described in literature. In summary several advantages could be taken from synthesis in high-temperature water. Many catalysts, absolutely necessary under ambient conditions, could either be completely avoided or replaced by cheap, sustainable alternatives. In this respect water is not only a green solvent, but helps to prevent waste and preserves resources.}, language = {en} } @phdthesis{Kubo2011, author = {Kubo, Shiori}, title = {Nanostructured carbohydrate-derived carbonaceous materials}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-53157}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {Nanoporous carbon materials are widely used in industry as adsorbents or catalyst supports, whilst becoming increasingly critical to the developing fields of energy storage / generation or separation technologies. In this thesis, the combined use of carbohydrate hydrothermal carbonisation (HTC) and templating strategies is demonstrated as an efficient route to nanostructured carbonaceous materials. HTC is an aqueous-phase, low-temperature (e.g. 130 - 200 °C) carbonisation, which proceeds via dehydration / poly-condensation of carbon precursors (e.g. carbohydrates and their derivatives), allowing facile access to highly functional carbonaceous materials. Whilst possessing utile, modifiable surface functional groups (e.g. -OH and -C=O-containing moieties), materials synthesised via HTC typically present limited accessible surface area or pore volume. Therefore, this thesis focuses on the development of fabrication routes to HTC materials which present enhanced textural properties and well-defined porosity. In the first discussed synthesis, a combined hard templating / HTC route was investigated using a range of sacrificial inorganic templates (e.g. mesoporous silica beads and macroporous alumina membranes (AAO)). Via pore impregnation of mesoporous silica beads with a biomass-derived carbon source (e.g. 2-furaldehyde) and subsequent HTC at 180 oC, an inorganic / carbonaceous hybrid material was produced. Removal of the template component by acid etching revealed the replication of the silica into mesoporous carbonaceous spheres (particle size ~ 5 μm), representing the inverse morphological structure of the original inorganic body. Surface analysis (e.g. FTIR) indicated a material decorated with hydrophilic (oxygenated) functional groups. Further thermal treatment at increasingly elevated temperatures (e.g. at 350, 550, 750 oC) under inert atmosphere allowed manipulation of functionalities from polar hydrophilic to increasingly non-polar / hydrophobic structural motifs (e.g. extension of the aromatic / pseudo-graphitic nature), thus demonstrating a process capable of simultaneous control of nanostructure and surface / bulk chemistry. As an extension of this approach, carbonaceous tubular nanostructures with controlled surface functionality were synthesised by the nanocasting of uniform, linear macropores of an AAO template (~ 200 nm). In this example, material porosity could be controlled, showing increasingly microporous tube wall features as post carbonisation temperature increased. Additionally, by taking advantage of modifiable surface groups, the introduction of useful polymeric moieties (i.e. grafting of thermoresponsive poly(N-isopropylacrylamide)) was also demonstrated, potentially enabling application of these interesting tubular structures in the fields of biotechnology (e.g. enzyme immobilization) and medicine (e.g. as drug micro-containers). Complimentary to these hard templating routes, a combined HTC / soft templating route for the direct synthesis of ordered porous carbonaceous materials was also developed. After selection of structural directing agents and optimisation of synthesis composition, the F127 triblock copolymer (i.e. ethylene oxide (EO)106 propylene oxide (PO)70 ethylene oxide (EO)106) / D-Fructose system was extensively studied. D-Fructose was found to be a useful carbon precursor as the HTC process could be performed at 130 oC, thus allowing access to stable micellular phase. Thermolytic template removal from the synthesised ordered copolymer / carbon composite yielded functional cuboctahedron single crystalline-like particles (~ 5 μm) with well ordered pore structure of a near perfect cubic Im3m symmetry. N2 sorption analysis revealed a predominantly microporous carbonaceous material (i.e. Type I isotherm, SBET = 257 m2g-1, 79 \% microporosity) possessing a pore size of ca. 0.9 nm. The addition of a simple pore swelling additive (e.g. trimethylbenzene (TMB)) to this system was found to direct pore size into the mesopore size domain (i.e. Type IV isotherm, SBET = 116 m2g-1, 60 \% mesoporosity) generating pore size of ca. 4 nm. It is proposed that in both cases as HTC proceeds to generate a polyfuran-like network, the organised block copolymer micellular phase is essentially "templated", either via hydrogen bonding between hydrophilic poly(EO) moiety and the carbohydrate or via hydrophobic interaction between hydrophobic poly(PO) moiety and forming polyfuran-like network, whilst the additive TMB presumably interact with poly(PO) moieties, thus swelling the hydrophobic region expanding the micelle template size further into the mesopore range.}, language = {en} } @phdthesis{Tan2011, author = {Tan, Irene}, title = {Towards greener stationary phases : thermoresponsive and carbonaceous chromatographic supports}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-53130}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {Polymers which are sensitive towards external physical, chemical and electrical stimuli are termed as 'intelligent materials' and are widely used in medical and engineering applications. Presently, polymers which can undergo a physical change when heat is applied at a certain temperature (cloud point) in water are well-studied for this property in areas of separation chemistry, gene and drug delivery and as surface modifiers. One example of such a polymer is the poly (N-isopropylacrylamide) PNIPAAM, where it is dissolved well in water below 32 oC, while by increasing the temperature further leads to its precipitation. In this work, an alternative polymer poly (2-(2-methoxy ethoxy)ethyl methacrylate-co- oligo(ethylene glycol) methacrylate) (P(MEO2MA-co-OEGMA)) is studied due to its biocompatibility and the ability to vary its cloud points in water. When a layer of temperature responsive polymer was attached to a single continuous porous piece of silica-based material known as a monolith, the thermoresponsive characteristic was transferred to the column surfaces. The hybrid material was demonstrated to act as a simple temperature 'switch' in the separation of a mixture of five steroids under water. Different analytes were observed to be separated under varying column temperatures. Furthermore, more complex biochemical compounds such as proteins were also tested for separation. The importance of this work is attributed to separation processes utilizing environmentally friendly conditions, since harsh chemical environments conventionally used to resolve biocompounds could cause their biological activities to be rendered inactive.}, language = {en} } @phdthesis{Popovic2011, author = {Popovic, Jelena}, title = {Novel lithium iron phosphate materials for lithium-ion batteries}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-54591}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {Conventional energy sources are diminishing and non-renewable, take million years to form and cause environmental degradation. In the 21st century, we have to aim at achieving sustainable, environmentally friendly and cheap energy supply by employing renewable energy technologies associated with portable energy storage devices. Lithium-ion batteries can repeatedly generate clean energy from stored materials and convert reversely electric into chemical energy. The performance of lithium-ion batteries depends intimately on the properties of their materials. Presently used battery electrodes are expensive to be produced; they offer limited energy storage possibility and are unsafe to be used in larger dimensions restraining the diversity of application, especially in hybrid electric vehicles (HEVs) and electric vehicles (EVs). This thesis presents a major progress in the development of LiFePO4 as a cathode material for lithium-ion batteries. Using simple procedure, a completely novel morphology has been synthesized (mesocrystals of LiFePO4) and excellent electrochemical behavior was recorded (nanostructured LiFePO4). The newly developed reactions for synthesis of LiFePO4 are single-step processes and are taking place in an autoclave at significantly lower temperature (200 deg. C) compared to the conventional solid-state method (multi-step and up to 800 deg. C). The use of inexpensive environmentally benign precursors offers a green manufacturing approach for a large scale production. These newly developed experimental procedures can also be extended to other phospho-olivine materials, such as LiCoPO4 and LiMnPO4. The material with the best electrochemical behavior (nanostructured LiFePO4 with carbon coating) was able to delive a stable 94\% of the theoretically known capacity.}, language = {en} } @phdthesis{tenBrummelhuis2011, author = {ten Brummelhuis, Niels}, title = {Self-assembly of cross-linked polymer micelles into complex higher-order aggregates}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-52320}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {The creation of complex polymer structures has been one of the major research topics over the last couple of decades. This work deals with the synthesis of (block co-)polymers, the creation of complex and stimuli-responsive aggregates by self-assembly, and the cross-linking of these structures. Also the higher-order self-assembly of the aggregates is investigated. The formation of poly-2-oxazoline based micelles in aqueous solution and their simultaneous functionalization and cross-linking using thiol-yne chemistry is e.g. presented. By introducing pH responsive thiols in the core of the micelles the influence of charged groups in the core of micelles on the entire structure can be studied. The charging of these groups leads to a swelling of the core and a decrease in the local concentration of the corona forming block (poly(2-ethyl-2-oxazoline)). This decrease in concentration yields a shift in the cloud point temperature to higher temperatures for this Type I thermoresponsive polymer. When the swelling of the core is prohibited, e.g. by the introduction of sufficient amounts of salt, this behavior disappears. Similar structures can be prepared using complex coacervate core micelles (C3Ms) built through the interaction of weakly acidic and basic polymer blocks. The advantage of these structures is that two different stabilizing blocks can be incorporated, which allows for more diverse and complex structures and behavior of the micelles. Using block copolymers with either a polyanionic or a polycationic block C3Ms could be created with a corona which contains two different soluble nonionic polymers, which either have a mixed corona or a Janus type corona, depending on the polymers that were chosen. Using NHS and EDC the micelles could easily be cross-linked by the formation of amide bonds in the core of the micelles. The higher-order self-assembly behavior of these core cross-linked complex coacervate core micelles (C5Ms) was studied. Due to the cross-linking the micelles are stabilized towards changes in pH and ionic strength, but polymer chains are also no longer able to rearrange. For C5Ms with a mixed corona likely network structures were formed upon the collapse of the thermoresponsive poly(N-isopropylacrylamide) (PNIPAAm), whereas for Janus type C5Ms well defined spherical aggregates of micelles could be obtained, depending on the pH of the solution. Furthermore it could be shown that Janus micelles can adsorb onto inorganic nanoparticles such as colloidal silica (through a selective interaction between PEO and the silica surface) or gold nanoparticles (by the binding of thiol end-groups). Asymmetric aggregates were also formed using the streptavidin-biotin binding motive. This is achieved by using three out of the four binding sites of streptavidin for the binding of one three-arm star polymer, end-functionalized with biotin groups. A homopolymer with one biotin end-group can be used to occupy the last position. This binding of two different polymers makes it possible to create asymmetric complexes. This phase separation is theoretically independent of the kind of polymer since the structure of the protein is the driving force, not the intrinsic phase separation between polymers. Besides Janus structures also specific cross-linking can be achieved by using other mixing ratios.}, language = {en} } @phdthesis{Fellinger2011, author = {Fellinger, Tim-Patrick}, title = {Hydrothermal and ionothermal carbon structures}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-57825}, school = {Universit{\"a}t Potsdam}, year = {2011}, abstract = {The needs for sustainable energy generation, but also a sustainable chemistry display the basic motivation of the current thesis. By different single investigated cases, which are all related to the element carbon, the work can be devided into two major topics. At first, the sustainable synthesis of "useful" carbon materials employing the process of hydrothermal carbonisation (HC) is described. In the second part, the synthesis of heteroatom - containing carbon materials for electrochemical and fuel cell applications employing ionic liquid precursors is presented. On base of a thorough review of the literature on hydrothermolysis and hydrothermal carbonisation of sugars in addition to the chemistry of hydroxymethylfurfural, mechanistic considerations of the formation of hydrothermal carbon are proposed. On the base of these reaction schemes, the mineral borax, is introduced as an additive for the hydrothermal carbonisation of glucose. It was found to be a highly active catalyst, resulting in decreased reaction times and increased carbon yields. The chemical impact of borax, in the following is exploited for the modification of the micro- and nanostructure of hydrothermal carbon. From the borax - mediated aggregation of those primary species, widely applicable, low density, pure hydrothermal carbon aerogels with high porosities and specific surface areas are produced. To conclude the first section of the thesis, a short series of experiments is carried out, for the purpose of demonstrating the applicability of the HC model to "real" biowaste i.e. watermelon waste as feedstock for the production of useful materials. In part two cyano - containing ionic liquids are employed as precursors for the synthesis of high - performance, heteroatom - containing carbon materials. By varying the ionic liquid precursor and the carbonisation conditions, it was possible to design highly active non - metal electrocatalyst for the reduction of oxygen. In the direct reduction of oxygen to water (like used in polymer electrolyte fuel cells), compared to commercial platinum catalysts, astonishing activities are observed. In another example the selective and very cost efficient electrochemical synthesis of hydrogen peroxide is presented. In a last example the synthesis of graphitic boron carbon nitrides from the ionic liquid 1 - Ethyl - 3 - methylimidazolium - tetracyanoborate is investigated in detail. Due to the employment of unreactive salts as a new tool to generate high surface area these materials were first time shown to be another class of non - precious metal oxygen reduction electrocatalyst.}, language = {en} } @book{MusilBurchard2011, author = {Musil, Andreas and Burchard, Daniel}, title = {Klausurenkurs im Europarecht}, series = {Schwerpunkt Klausurenkurs}, journal = {Schwerpunkt Klausurenkurs}, edition = {2., neu bearb. u. erw. Aufl.}, publisher = {M{\"u}ller}, address = {Heidelberg}, isbn = {978-3-8114-9829-7}, pages = {389}, year = {2011}, language = {de} } @misc{CostardStadieRitteretal.2011, author = {Costard, Sylvia and Stadie, Nicole and Ritter, Christiane and Moll, Kristina and Landerl, Karin and Kohnen, Saskia and Kentner, Gerrit and Bethmann, Anja and Scheich, Henning and Brechmann, Andr{\´e} and De Kok, D{\"o}rte and Berger, Frauke and Sticher, Heike and Czepluch, Christine and M{\"a}tzener, Flurina and Wilmes, Stefanie and Hadert, Sandra and Frank, Ulrike and M{\"a}der, Mark and Westermann, Antje and Meinusch, Miriam and Neumann, Sandra and D{\"u}sterh{\"o}ft, Stefanie and Posse, Dorothea and Puritz, Caroline and Seidl, Rainer Ottis and Etzien, Maria and Machleb, Franziska and Lorenz, Antje and H{\"o}ger, Maria and Schr{\"o}der, Astrid and Busch, Tobias and Heide, Judith and Tagoe, Tanja and Watermeyer, Melanie and H{\"o}hle, Barbara and Kauschke, Christina}, title = {Spektrum Patholinguistik = Schwerpunktthema: Lesen lernen: Diagnostik und Therapie bei St{\"o}rungen des Leseerwerbs}, number = {4}, editor = {Hanne, Sandra and Fritzsche, Tom and Ott, Susan and Adelt, Anne}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, organization = {Verband f{\"u}r Patholinguistik e. V. (vpl)}, isbn = {978-3-86956-145-5}, issn = {1869-3822}, doi = {10.25932/publishup-5155}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-53146}, year = {2011}, abstract = {Am 20. November 2010 fand an der Universit{\"a}t Potsdam das 4. Herbsttreffen Patholinguistik statt. Die Konferenzreihe wird regelm{\"a}ßig seit 2007 vom Verband f{\"u}r Patholinguistik e.V. (vpl) durchgef{\"u}hrt. Der vorliegende Tagungsband ver{\"o}ffentlicht die Hauptvortr{\"a}ge des Herbsttreffens zum Thema "Lesen lernen: Diagnostik und Therapie bei St{\"o}rungen des Leseerwerbs". Des Weiteren sind die Beitr{\"a}ge promovierender bzw. promovierter PatholinguistInnen sowie der Posterpr{\"a}sentationen enthalten.}, language = {de} } @book{RaithRaaseReinhardt2011, author = {Raith, Michael M. and Raase, Peter and Reinhardt, J{\"u}rgen}, title = {Leitfaden zur D{\"u}nnschliffmikroskopie}, isbn = {978-3-00-036420-4}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-bbdig-252}, publisher = {Universit{\"a}t Potsdam}, pages = {IV, 125}, year = {2011}, language = {de} } @article{Lederer2011, author = {Lederer, Markus}, title = {From CDM to REDD+ - what do we know for setting up effective and legitimate carbon governance?}, series = {Ecological economics}, volume = {70}, journal = {Ecological economics}, number = {11}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0921-8009}, doi = {10.1016/j.ecolecon.2011.02.003}, pages = {1900 -- 1907}, year = {2011}, abstract = {This article compares two carbon governance instruments - the Clean Development Mechanism (CDM) and Reducing Emissions from Deforestation and Degradation (REDD+) - to assess lessons from the former for the latter regarding effectiveness and legitimacy of such instruments. The article argues that the CDM has a relatively high degree of output-oriented legitimacy resulting in effectiveness and some input-oriented legitimacy, with few discernible tradeoffs between them. In contrasting this to REDD+, the hypotheses are advanced that (i) output-oriented legitimacy/effectiveness can again be achieved but that (ii) a higher degree of input-oriented legitimacy is necessary for REDD+ and thus also a certain trade-off between the two forms of legitimacy can be expected. This is shown through comparing the technologies and methodologies, economic rationales, political support, regulatory structures, and environmental impacts of both instruments.}, language = {en} } @article{Lederer2011, author = {Lederer, Markus}, title = {Practicing agrifood governance}, series = {Food policy : economics planning and politics of food and agriculture}, volume = {36}, journal = {Food policy : economics planning and politics of food and agriculture}, number = {6}, publisher = {Elsevier}, address = {Oxford}, issn = {0306-9192}, doi = {10.1016/j.foodpol.2011.07.009}, pages = {756 -- 759}, year = {2011}, abstract = {The conclusion to the special section has three objectives: First, it argues that a focus on "practice" implicitly connects all the articles in the special section and thereby reinforces the core points of the analytical framework introduced by Fuchs and Glaab. Second, the paper summarizes the main messages of the articles by identifying three red threads that are dominant in all four contributions. These are the strong focus of all authors on ideational forces, an emphasis on the role of academics and the description of complexities of local-global interdependencies. Third, some common blind spots are identified that merit future research.}, language = {en} } @article{LedererObser2011, author = {Lederer, Markus and Obser, Andreas}, title = {Neue Tendenzen in der Entwicklungszusammenarbeit der Vereinten Nation}, series = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, journal = {Die Vereinten Nationen vor globalen Herausforderungen : Referate der Potsdamer UNO-Konferenzen 2000-2008}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-61114}, pages = {251 -- 260}, year = {2011}, abstract = {Inhalt: - I. Die N-Entwicklungszusammenarbeit war zu starr und ineffizient - umfassende Reformen wurden Ende der 90er Jahre durchgef{\"u}hrt. - II. UN-Entwicklungszusammenarbeit ist politischer geworden - mehr Politikkoh{\"a}renz, neue Partnerschaften und demokratischere Regierungsf{\"u}hrung werden gefordert - 1. Mehr Politikkoh{\"a}renz - 2. Neue Partnerschaften - 3. Demokratische Regierungsf{\"u}hrung - II. UN-Entwicklungszusammenarbeit wird strategischer umgesetzt - Ausrichtung an Millenniumszielen, harmonisierte Programmhilfe, und ergebnisorientiertes Management werden erwartet - 1. Ausrichtung an den Millenniumszielen der UN - 2. Harmonisierte Programmhilfe - 3. Ergebnisorientiertes Management - III. Schlußfolgerungen - Literatur}, language = {de} } @article{Mackert2011, author = {Mackert, J{\"u}rgen}, title = {Im Auftrag des Staates}, series = {Berliner Journal f{\"u}r Soziologie}, volume = {21}, journal = {Berliner Journal f{\"u}r Soziologie}, number = {3}, publisher = {Springer}, address = {Wiesbaden}, issn = {0863-1808}, doi = {10.1007/s11609-011-0165-9}, pages = {431 -- 459}, year = {2011}, abstract = {Folter ist ein Akt extremer kollektiver Gewalt, der im Auftrag eines Staates im Geheimen ausge{\"u}bt wird. Die Frage, was Menschen dazu bringt, anderen Menschen diese extreme Gewalt anzutun, verengt den Blick f{\"u}r ein Verst{\"a}ndnis der Folter allzu schnell auf individualistische Erkl{\"a}rungsversuche. Der vorliegende Aufsatz geht im Gegensatz dazu von der Gruppe der Folterer aus und r{\"u}ckt die sozialen Beziehungen dieser Form der Vergesellschaftung und die von ihnen ausgehenden sozialen Dynamiken und Effekte in den Mittelpunkt. In einem ersten Schritt werden Georg Simmels formale Bestimmungen der geheimen Gesellschaft rekonstruiert und auf die geheime Gesellschaft der Folterer angewandt und spezifiziert; auf dieser Grundlage werden im zweiten Schritt Handlungsbedingungen der Mitglieder der geheimen Gesellschaft der Folterer herausgearbeitet; der dritte Schritt bestimmt die eigendynamischen Prozesse des Ph{\"a}nomens der Folter, die aus der Eskalation politischer Konflikte, der Gruppe der Folterer und der Situation der Folter erwachsen. Die These lautet, dass sich aus der Perspektive einer relationalen Soziologie ein theoretischer Zugriff auf das Problem der Folter ergibt, der weiterf{\"u}hrende Erkl{\"a}rungen des Ph{\"a}nomens erm{\"o}glicht.}, language = {de} } @article{Rolfes2011, author = {Rolfes, Manfred}, title = {Rechtsextremismus und Raum}, series = {Grenzen der Toleranz : rechtsextremes Milieu und demokratische Gesellschaft in Brandenburg ; Bilanz und Perspektiven}, journal = {Grenzen der Toleranz : rechtsextremes Milieu und demokratische Gesellschaft in Brandenburg ; Bilanz und Perspektiven}, isbn = {978-3-86956-038-0}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-52219}, pages = {129 -- 149}, year = {2011}, language = {de} } @article{Mackert2011, author = {Mackert, J{\"u}rgen}, title = {In the name of the state the secret society of the torturers}, series = {Berliner Journal f{\"u}r Soziologie = Journal de sociologie de Berlin}, volume = {21}, journal = {Berliner Journal f{\"u}r Soziologie = Journal de sociologie de Berlin}, number = {3}, publisher = {Springer}, address = {Wiesbaden}, issn = {0863-1808}, doi = {10.1007/s11609-011-0165-9}, pages = {431 -- 459}, year = {2011}, abstract = {Torture is an extreme act of collective violence that is secretly executed in the name of a state. In order to explain the reasons why people torture others, individualist approaches concentrate on individuals' motives or interests. Contrary to that, the article argues that torture should be understood as a social relation. Thus, it takes the social relations of the group of torturers as a starting point. Firstly, following Georg Simmel's analysis of the secret society the paper argues that the group of torturers can adequately be conceptualized as a secret society; secondly, against this background the article reconstructs the conditions which structure torturers' agency; finally, this article offers an outline of the processes and dynamics that allows for explaining the phenomenon of torture. The thesis of the article argues that a relational sociology helps better explain and understand the social phenomenon of torture.}, language = {de} }