TY  - JOUR
A1  - Abdalla, Hassan E.
A1  - Aharonian, Felix A.
A1  - Ait Benkhali, Faical
A1  - Angüner, Ekrem Oǧuzhan
A1  - Arakawa, M.
A1  - Arcaro, C.
A1  - Armand, C.
A1  - Arrieta, M.
A1  - Backes, Michael
A1  - Barnard, M.
A1  - Becherini, Yvonne
A1  - Tjus, J. Becker
A1  - Berge, D.
A1  - Bernhard, S.
A1  - Bernlöhr, Konrad
A1  - Blackwell, R.
A1  - Böttcher, Markus
A1  - Boisson, C.
A1  - Bolmont, Julien
A1  - Bonnefoy, S.
A1  - Bordas, Pol
A1  - Bregeon, J.
A1  - Brun, F.
A1  - Brun, P.
A1  - Bryan, M.
A1  - Büchele, M.
A1  - Bulik, Tomasz
A1  - Bylund, Tomas
A1  - Capasso, Massimo
A1  - Caroff, S.
A1  - Carosi, A.
A1  - Casanova, Sabrina
A1  - Cerruti, Matteo
A1  - Chakraborty, Nachiketa
A1  - Chandra, S.
A1  - Chaves, R. C. G.
A1  - Chen, A.
A1  - Colafrancesco, Sergio
A1  - Condon, B.
A1  - Davids, Isak
A1  - Deil, Christoph
A1  - Devin, J.
A1  - deWilt, P.
A1  - Dirson, L.
A1  - Djannati-Atai, A.
A1  - Dmytriiev, A.
A1  - Donath, Axel
A1  - Doroshenko, Victor
A1  - Dyks, J.
A1  - Egberts, Kathrin
A1  - Emery, G.
A1  - Ernenwein, J. -P.
A1  - Eschbach, Stefan
A1  - Fegan, S.
A1  - Fiasson, Armand
A1  - Fontaine, G.
A1  - Funk, Sebastian
A1  - Füßling, Matthias
A1  - Gabici, S.
A1  - Gallant, Y. A.
A1  - Gate, F.
A1  - Giavitto, Gianluca
A1  - Eisenacher Glawion, Dorit
A1  - Glicenstein, Jean-François
A1  - Gottschall, D.
A1  - Grondin, Marie-Hélène
A1  - Hahn, J.
A1  - Haupt, M.
A1  - Heinzelmann, G.
A1  - Henri, Gilles
A1  - Hermann, G.
A1  - Hinton, James Anthony
A1  - Hofmann, Werner
A1  - Hoischen, Clemens
A1  - Holch, Tim Lukas
A1  - Holler, M.
A1  - Horns, D.
A1  - Huber, D.
A1  - Iwasaki, H.
A1  - Jacholkowska, A.
A1  - Jamrozy, M.
A1  - Jankowsky, David
A1  - Jankowsky, Felix
A1  - Jouvin, L.
A1  - Jung-Richardt, I.
A1  - Kastendieck, M. A.
A1  - Katarzyński, Krzysztof
A1  - Katsuragawa, M.
A1  - Katz, U.
A1  - Kerszberg, D.
A1  - Khangulyan, D.
A1  - Khelifi, B.
A1  - King, J.
A1  - Klepser, S.
A1  - Kluzniak, W.
A1  - Komin, Nu.
A1  - Kosack, K.
A1  - Krakau, S.
A1  - Kraus, M.
A1  - Kruger, P. P.
A1  - Lamanna, G.
A1  - Lau, J.
A1  - Lefaucheur, J.
A1  - Lemiere, A.
A1  - Lemoine-Goumard, M.
A1  - Lenain, J. -P.
A1  - Leser, Eva
A1  - Lohse, T.
A1  - Lorentz, M.
A1  - Lopez-Coto, R.
A1  - Lypova, I.
A1  - Malyshev, D.
A1  - Marandon, V.
A1  - Marcowith, Alexandre
A1  - Mariaud, C.
A1  - Marti-Devesa, G.
A1  - Marx, R.
A1  - Maurin, G.
A1  - Meintjes, P. J.
A1  - Mitchell, A. M. W.
A1  - Moderski, R.
A1  - Mohamed, M.
A1  - Mohrmann, L.
A1  - Moulin, Emmanuel
A1  - Murach, T.
A1  - Nakashima, S.
A1  - de Naurois, M.
A1  - Ndiyavala, H.
A1  - Niederwanger, F.
A1  - Niemiec, J.
A1  - Oakes, L.
A1  - Odaka, H.
A1  - Ohm, S.
A1  - Ostrowski, M.
A1  - Oya, I.
A1  - Padovani, M.
A1  - Panter, M.
A1  - Parsons, R. D.
A1  - Perennes, C.
A1  - Petrucci, P. -O.
A1  - Peyaud, B.
A1  - Piel, Q.
A1  - Pita, S.
A1  - Poireau, V.
A1  - Noel, A. Priyana
A1  - Prokhorov, D. A.
A1  - Prokoph, H.
A1  - Puehlhofer, G.
A1  - Punch, M.
A1  - Quirrenbach, A.
A1  - Raab, S.
A1  - Rauth, R.
A1  - Reimer, A.
A1  - Reimer, O.
A1  - Renaud, M.
A1  - Rieger, F.
A1  - Rinchiuso, L.
A1  - Romoli, C.
A1  - Rowell, G.
A1  - Rudak, B.
A1  - Ruiz-Velasco, E.
A1  - Sahakian, V.
A1  - Saito, S.
A1  - Sanchez, D. A.
A1  - Santangelo, A.
A1  - Sasaki, M.
A1  - Schlickeiser, R.
A1  - Schussler, F.
A1  - Schulz, A.
A1  - Schwanke, U.
A1  - Schwemmer, S.
A1  - Seglar-Arroyo, M.
A1  - Senniappan, M.
A1  - Seyffert, A. S.
A1  - Shafi, N.
A1  - Shilon, I.
A1  - Shiningayamwe, K.
A1  - Simoni, R.
A1  - Sinha, A.
A1  - Sol, H.
A1  - Spanier, F.
A1  - Specovius, A.
A1  - Spir-Jacob, M.
A1  - Stawarz, L.
A1  - Steenkamp, R.
A1  - Stegmann, Christian
A1  - Steppa, Constantin Beverly
A1  - Takahashi, T.
A1  - Tavernet, J. -P.
A1  - Tavernier, T.
A1  - Taylor, A. M.
A1  - Terrier, R.
A1  - Tibaldo, L.
A1  - Tiziani, D.
A1  - Tluczykont, M.
A1  - Trichard, C.
A1  - Tsirou, M.
A1  - Tsuji, N.
A1  - Tuffs, R.
A1  - Uchiyama, Y.
A1  - van der Walt, D. J.
A1  - van Eldik, C.
A1  - van Rensburg, C.
A1  - van Soelen, B.
A1  - Vasileiadis, G.
A1  - Veh, J.
A1  - Venter, C.
A1  - Viana, A.
A1  - Vincent, P.
A1  - Vink, J.
A1  - Voisin, F.
A1  - Voelk, H. J.
A1  - Vuillaume, T.
A1  - Wadiasingh, Z.
A1  - Wagner, S. J.
A1  - Wagner, R. M.
A1  - White, R.
A1  - Wierzcholska, A.
A1  - Yang, R.
A1  - Zaborov, D.
A1  - Zacharias, M.
A1  - Zanin, R.
A1  - Zdziarski, A.
A1  - Zech, Alraune
A1  - Zefi, F.
A1  - Ziegler, A.
A1  - Zorn, J.
A1  - Zywucka, N.
A1  - Cirelli, M.
A1  - Panci, P.
A1  - Sala, F.
A1  - Silk, J.
A1  - Taoso, M.
T1  - Searches for gamma-ray lines and 'pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S.
JF  - Journal of cosmology and astroparticle physics
N2  - Dwarf spheroidal galaxies are among the most promising targets for detecting signals of Dark Matter (DM) annihilations. The H.E.S.S. experiment has observed five of these systems for a total of about 130 hours. The data are re-analyzed here, and, in the absence of any detected signals, are interpreted in terms of limits on the DM annihilation cross section. Two scenarios are considered: i) DM annihilation into mono-energetic gamma-rays and ii) DM in the form of pure WIMP multiplets that, annihilating into all electroweak bosons, produce a distinctive gamma-ray spectral shape with a high-energy peak at the DM mass and a lower-energy continuum. For case i), upper limits at 95% confidence level of about <sigma upsilon > less than or similar to 3 x 10(-25) cm(3) s(-1) are obtained in the mass range of 400 GeV to 1TeV. For case ii), the full spectral shape of the models is used and several excluded regions are identified, but the thermal masses of the candidates are not robustly ruled out.
KW  - dark matter detectors
KW  - dark matter experiments
KW  - dwarfs galaxies
KW  - gamma ray detectors
Y1  - 2018
U6  - https://doi.org/10.1088/1475-7516/2018/11/037
SN  - 1475-7516
IS  - 11
PB  - IOP Publishing Ltd. (Bristol)
CY  - Bristol
ER  - 
TY  - JOUR
A1  - Anlauf, Lena
A1  - Becker, Christian
A1  - Billet, Camille
A1  - Etzi, Priamo
A1  - Glienicke, Frank
A1  - Haghanipour, Bahar
A1  - Meyer, Gunda
A1  - Rießbeck, Sebastian
A1  - Volger, Helmut
A1  - Welke, Jenny
A1  - Wendt, Johannes
T1  - MenschenRechtsMagazin : Informationen │ Meinungen │ Analysen
N2  - • Menschenrechte und Demokratie • Hannah Arendt und das Recht, Rechte zu haben • Kindersoldaten aus völkerrechtlicher Perspektive – Teil II • Guantánamo Bay – ein rechtsfreier Raum? • Bericht über die Sitzungen des Menschenrechtsrates der Vereinten Nationen 2006/2007
T3  - MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen - 13.2007/3 
Y1  - 2007
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-36793
SN  - 1434-2820
VL  - 12
IS  - 3
PB  - Universitätsverlag Potsdam
CY  - Potsdam
ER  - 
TY  - BOOK
A1  - Bauer, Hartmut
A1  - Mühl-Jäckel, Margarete
A1  - Becker, Ulrich
A1  - Brüning, Christoph
A1  - Schäfer, Roland
A1  - Röber, Manfred
A1  - Kunze, Sebastian
ED  - Bauer, Hartmut
ED  - Büchner, Christiane
ED  - Hajasch, Lydia
T1  - Rekommunalisierung öffentlicher Daseinsvorsorge
N2  - Mehr Privat statt Staat! Diese Kampfformel galt vielen noch vor kurzem als Schlüssel zur erfolgreichen Entlastung der angespannten kommunalen Haushalte. Immer mehr Kommunen beschritten den vermeintlichen Königsweg. So vielfältig wie die Gegenstände sind auch die in der Verwaltungspraxis zu beobachtenden Erscheinungsformen der Privatisierung: Vermögensprivatisierung, Organisationsprivatisierung, Aufgabenprivatisierung mit facettenreichen Mischformen namentlich der Public Private Partnerships. Zwar brachte der „Verkauf des Tafelsilbers“ den Kommunen kurzzeitig einen Geldsegen. Doch haben bei weitem nicht alle Privatisierungsmaßnahmen die in sie gesetzten Erwartungen erfüllt und es setzt sich zunehmend die Einsicht durch, dass die Privatwirtschaft nicht zwangsläufig besser, effizienter und kostengünstiger arbeitet als die Öffentliche Hand. Inzwischen deutet sich im kommunalen Bereich eine klare Trendumkehr in Richtung Rekommunalisierung an. Die 17. Fachtagung des Kommunalwissenschaftlichen Instituts (KWI) der Universität Potsdam greift in diese anlaufende Grundsatzdebatte ein und nimmt aktuelle Bestrebungen der Rekommunalisierung lokaler Aufgaben auf. Im Vordergrund stehen erste praktische Erfahrungen, Implementationsprobleme und nicht zuletzt die rechtlichen Rahmenbedingungen und normativen Direktiven für Rekommunalisierungen namentlich in Segmenten der öffentlichen Daseinsvorsorge.
N2  - "Private-run better than state-run." Up until a short while ago this had been the battle slogan for a successful discharge of the tight municipal budgets. More and more municipalities chose this supposedly ideal solution. As diverse as the subjects of privatisation are, are its forms to be seen in administrative practice: privatising of property owned by public authorities, of organisations and of responsibilities with various mixed forms specially the Public Private Partnerships. The selling of significant municipal property brought a short welcome sum to the local governments. But by far not all of privatising measures fulfilled expectations and it is increasingly realised that private sector is working neither better, nor more efficiently, nor less expensively than public authorities. Meanwhile a trend towards remunicipalisation is clearly observed in municipal sector. The 17th Congress of the Institute of Local Government Studies of the University of Potsdam (KWI) interferes in this debate on fundamental principles and takes up actual efforts of remunicipalisation. Here, first practical experiences, problems of implementation and last but not least legal basic conditions and normative directives for remunicipalisation specially in parts of the general public service are most important.
T3  - KWI-Schriften - 6 
KW  - Rekommunalisierung
KW  - öffentliche Daseinsvorsorge
KW  - Kommunalwirtschaft
KW  - Privatisierung
KW  - Konzessionsverträge
Y1  - 2012
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-58064
SN  - 978-3-86956-170-7
SN  - 1867-9528
SN  - 1867-951X
PB  - Universitätsvlerag Potsdam
CY  - Potsdam
ER  - 
TY  - JOUR
A1  - Becker, George D.
A1  - Pettini, Max
A1  - Rafelski, Marc
A1  - Boera, Elisa
A1  - Christensen, Lise
A1  - Cupani, Guido
A1  - Ellison, Sara L.
A1  - Farina, Emanuele Paolo
A1  - Fumagalli, Michele
A1  - Lopez, Sebastian
A1  - Neeleman, Marcel
A1  - Ryan-Weber, Emma
A1  - Worseck, Gabor
T1  - The Evolution of OI over 3.2 < z < 6.5: Reionization of the Circumgalactic Medium
JF  - The astrophysical journal : an international review of spectroscopy and astronomical physics
N2  - We present a survey for metal absorption systems traced by neutral oxygen over 3.2 < z < 6.5. Our survey uses Keck/ESI and VLT/X-Shooter spectra of 199 QSOs with redshifts up to 6.6. In total, we detect 74 OI absorbers, of which 57 are separated from the background QSO by more than 5000 km s(-1). We use a maximum likelihood approach to fit the distribution of OI lambda 1302 equivalent widths in bins of redshift and from this determine the evolution in number density of absorbers with W-1302 > 0.05 angstrom, of which there are 49 nonproximate systems in our sample. We find that the number density does not monotonically increase with decreasing redshift, as would naively be expected from the buildup of metal-enriched circumgalactic gas with time. The number density over 4.9 < z < 5.7 is a factor of 1.7-4.1 lower (68% confidence) than that over 5.7 < z < 6.5, with a lower value at z < 5.7 favored with 99% confidence. This decrease suggests that the fraction of metals in a low-ionization phase is larger at z similar to 6 than at lower redshifts. Absorption from highly ionized metals traced by CIV is also weaker in higher-redshift OI systems, supporting this picture. The evolution of OI absorbers implies that metal-enriched circumgalactic gas at z similar to 6 is undergoing an ionization transition driven by a strengthening ultraviolet background. This in turn suggests that the reionization of the diffuse intergalactic medium may still be ongoing at or only recently ended by this epoch.
Y1  - 2019
U6  - https://doi.org/10.3847/1538-4357/ab3eb5
SN  - 0004-637X
SN  - 1538-4357
VL  - 883
IS  - 2
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  - 
TY  - JOUR
A1  - Berg, Trystyn A. M.
A1  - Ellison, Sara L.
A1  - Sanchez-Ramirez, Ruben
A1  - Lopez, Sebastian
A1  - Becker, George D.
A1  - Christensen, Lise
A1  - Cupani, Guido
A1  - Denney, Kelly D.
A1  - Worseck, Gabor
T1  - Sub-damped Lyman alpha systems in the XQ-100 survey - I. Identification and contribution to the cosmological H I budget
JF  - Monthly notices of the Royal Astronomical Society
KW  - galaxies: high-redshift
KW  - galaxies: ISM
KW  - quasars: absorption lines
Y1  - 2019
U6  - https://doi.org/10.1093/mnras/stz2012
SN  - 0035-8711
SN  - 1365-2966
VL  - 488
IS  - 3
SP  - 4356
EP  - 4369
PB  - Oxford Univ. Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Christensen, Lise Bech
A1  - Sanchez, Sebastian F.
A1  - Jahnke, Knud
A1  - Becker, Thomas
A1  - Kelz, A.
A1  - Wisotzki, Lutz
A1  - Roth, Martin M.
T1  - Integral field observations of damped Lyman-alpha galaxies
N2  - We report preliminary results from a targeted investigation on quasars containing damped Lyman-alpha absorption (DLA) lines as well strong metal absorption lines, carried out with the Potsdam Multi Aperture Spectrophotometer (PMAS). We search for line-emitting objects at the same redshift as the absorption lines and close to the line of sight of the QSOs. We have observed and detected the already confirmed absorbing galaxies in Q2233+131 (Z(abs) = 3.15) and Q0151+045 (Z(abs),= 0.168), while failing to find spectral signatures for the z = 0.091 absorber in Q0738+313. From the Q2233+131 DLA galaxy, we have detected extended Lyalpha emission from an area of 3" x 5"
Y1  - 2004
ER  - 
TY  - JOUR
A1  - Christensen, Lise Bech
A1  - Sanchez, Sebastian F.
A1  - Jahnke, Knud
A1  - Becker, Thomas
A1  - Wisotzki, Lutz
A1  - Kelz, A.
A1  - Popovic, L. C.
A1  - Roth, Martin M.
T1  - Integral field spectroscopy of extended Ly alpha emission from the DLA galaxy in Q2233+131
N2  - This paper presents observations of an extended Lyman-alpha emission nebula surrounding the galaxy responsible for the Damped Lyman-alpha Absorption (DLA) line in the spectrum of the quasar Q2233+131. With the Potsdam Multi Aperture Spectrophotometer (PMAS) we measure the properties of the extended Lyalpha emission in an area of 3" x 5" having a total line flux of (2.8 +/- 0.3) x 10(-16) erg cm(-2) s(-1), which at redshift z = 3.15 corresponds to a luminosity of (2.4(-0.2)(+0.3)) x 10(43) erg s(-1) and a size of 23 x 38 kpc. The location of the emission is spatially coincident with the previously detected DLA galaxy, but extends significantly beyond its limb. We argue that the Lya emission is likely to be caused by an outflow from the DLA galaxy, presumably powered by star formation. In the case of negligible dust extinction, the Lya luminosity indicates a star-formation rate of 19 +/- 10 M-. yr(-1) consistent with that derived from the UV continuum flux from the parent galaxy. The wind velocity indicated by the integral field spectra is of the order of several hundred km s(-1). We find no indication of emission originating in a rotating disk
Y1  - 2004
ER  - 
TY  - JOUR
A1  - Christensen, Lise Bech
A1  - Schulte-Ladbeck, R. E.
A1  - Sanchez, Sebastian F.
A1  - Becker, Thomas
A1  - Jahnke, Knud
A1  - Kelz, A.
A1  - Roth, Martin M.
A1  - Wisotzki, Lutz
T1  - Abundances and kinematics of a candidate sub-damped Lymana galaxy toward PHL 1226
N2  - The spectrum of the quasar PHL 1226 is known to have a strong Mg II and sub-damped Lymanalpha (sub-DLA) absorption line system with N(H I) = (5 +/- 2) x 10(19) cm(-2) at z = 0.1602. Using integral field spectra from the Potsdam Multi Aperture Spectrophotometer (PMAS) we investigate a galaxy at an impact parameter of 6".4 which is most probably responsible for the absorption lines. A fainter galaxy at a similar redshift and a slightly larger distance from the QSO is known to exist, but we assume that the absorption is caused by the more nearby galaxy. From optical Balmer lines we estimate an intrinsic reddening consistent with 0, and a moderate star formation rate of 0.5 M-circle dot yr(-1) is inferred from the Ha luminosity. Using nebular emission line ratios we find a solar oxygen abundance 12 + log (O/H) = 8.7 +/- 0.1 and a solar nitrogen to oxygen abundance ratio log (N/O) = -1.0 +/- 0.2. This abundance is larger than those of all known sub-DLA systems derived from analyses of metal absorption lines in quasar spectra. On the other hand, the properties are compatible with the most metal rich galaxies responsible for strong Mg II absorption systems. These two categories can be reconciled if we assume an abundance gradient similar to local galaxies. Under that assumption we predict abundances 12 + log (O/H) = 7.1 and log (N/O) = -1.9 for the sub-DLA cloud, which is similar to high redshift DLA and sub-DLA systems. We find evidence for a rotational velocity of similar to200 km s(-1) over a length of similar to7 kpc. From the geometry and kinematics of the galaxy we estimate that the absorbing cloud does not belong to a rotating disk, but could originate in a rotating halo
Y1  - 2005
ER  - 
TY  - GEN
A1  - Dahm, Torsten
A1  - Becker, Dirk
A1  - Bischoff, Monika
A1  - Cesca, Simone
A1  - Dost, B.
A1  - Fritschen, R.
A1  - Hainzl, Sebastian
A1  - Klose, C. D.
A1  - Kuhn, D.
A1  - Lasocki, S.
A1  - Meier, Thomas
A1  - Ohrnberger, Matthias
A1  - Rivalta, Eleonora
A1  - Wegler, Ulrich
A1  - Husen, Stephan
T1  - Recommendation for the discrimination of human-related and natural seismicity
T2  - Journal of seismology
N2  - Various techniques are utilized by the seismological community, extractive industries, energy and geoengineering companies to identify earthquake nucleation processes in close proximity to engineering operation points. These operations may comprise fluid extraction or injections, artificial water reservoir impoundments, open pit and deep mining, deep geothermal power generations or carbon sequestration. In this letter to the editor, we outline several lines of investigation that we suggest to follow to address the discrimination problem between natural seismicity and seismic events induced or triggered by geoengineering activities. These suggestions have been developed by a group of experts during several meetings and workshops, and we feel that their publication as a summary report is helpful for the geoscientific community. Specific investigation procedures and discrimination approaches, on which our recommendations are based, are also published in this Special Issue (SI) of Journal of Seismology.
KW  - Triggered seismicity
KW  - Induced seismicity
Y1  - 2013
U6  - https://doi.org/10.1007/s10950-012-9295-6
SN  - 1383-4649
VL  - 17
IS  - 1
SP  - 197
EP  - 202
PB  - Springer
CY  - Dordrecht
ER  - 
TY  - JOUR
A1  - Ferrari, Camilla
A1  - Proost, Sebastian
A1  - Janowski, Marcin Andrzej
A1  - Becker, Jörg
A1  - Nikoloski, Zoran
A1  - Bhattacharya, Debashish
A1  - Price, Dana
A1  - Tohge, Takayuki
A1  - Bar-Even, Arren
A1  - Fernie, Alisdair R.
A1  - Stitt, Mark
A1  - Mutwil, Marek
T1  - Kingdom-wide comparison reveals the evolution of diurnal gene expression in Archaeplastida
JF  - Nature Communications
N2  - Plants have adapted to the diurnal light-dark cycle by establishing elaborate transcriptional programs that coordinate many metabolic, physiological, and developmental responses to the external environment. These transcriptional programs have been studied in only a few species, and their function and conservation across algae and plants is currently unknown. We performed a comparative transcriptome analysis of the diurnal cycle of nine members of Archaeplastida, and we observed that, despite large phylogenetic distances and dramatic differences in morphology and lifestyle, diurnal transcriptional programs of these organisms are similar. Expression of genes related to cell division and the majority of biological pathways depends on the time of day in unicellular algae but we did not observe such patterns at the tissue level in multicellular land plants. Hence, our study provides evidence for the universality of diurnal gene expression and elucidates its evolutionary history among different photosynthetic eukaryotes.
Y1  - 2019
U6  - https://doi.org/10.1038/s41467-019-08703-2
SN  - 2041-1723
VL  - 10
PB  - Nature Publ. Group
CY  - London
ER  -