Refine
Year of publication
- 2024 (75)
- 2023 (457)
- 2022 (1320)
- 2021 (1438)
- 2020 (1793)
- 2019 (2019)
- 2018 (2162)
- 2017 (1941)
- 2016 (1772)
- 2015 (1516)
- 2014 (1357)
- 2013 (1222)
- 2012 (1290)
- 2011 (1103)
- 2010 (641)
- 2009 (855)
- 2008 (384)
- 2007 (352)
- 2006 (730)
- 2005 (785)
- 2004 (788)
- 2003 (481)
- 2002 (389)
- 2001 (460)
- 2000 (531)
- 1999 (567)
- 1998 (531)
- 1997 (427)
- 1996 (377)
- 1995 (428)
- 1994 (235)
- 1993 (42)
- 1992 (29)
- 1991 (11)
Document Type
- Article (19987)
- Doctoral Thesis (3088)
- Postprint (2062)
- Monograph/Edited Volume (1181)
- Other (622)
- Review (576)
- Conference Proceeding (285)
- Preprint (229)
- Part of a Book (189)
- Working Paper (123)
Language
- English (28548) (remove)
Is part of the Bibliography
- yes (28548) (remove)
Keywords
- climate change (163)
- Germany (94)
- diffusion (72)
- machine learning (72)
- German (66)
- Arabidopsis thaliana (64)
- anomalous diffusion (56)
- stars: massive (55)
- Climate change (53)
- Holocene (53)
Institute
- Institut für Physik und Astronomie (4742)
- Institut für Biochemie und Biologie (4576)
- Institut für Geowissenschaften (3181)
- Institut für Chemie (2808)
- Institut für Mathematik (1546)
- Department Psychologie (1378)
- Institut für Ernährungswissenschaft (992)
- Department Linguistik (901)
- Wirtschaftswissenschaften (818)
- Institut für Informatik und Computational Science (788)
- Institut für Umweltwissenschaften und Geographie (719)
- Department Sport- und Gesundheitswissenschaften (680)
- Mathematisch-Naturwissenschaftliche Fakultät (535)
- Institut für Anglistik und Amerikanistik (466)
- Sozialwissenschaften (438)
- Strukturbereich Kognitionswissenschaften (400)
- Extern (385)
- Hasso-Plattner-Institut für Digital Engineering gGmbH (342)
- Hasso-Plattner-Institut für Digital Engineering GmbH (333)
- Humanwissenschaftliche Fakultät (255)
- Fachgruppe Betriebswirtschaftslehre (250)
- Fachgruppe Politik- & Verwaltungswissenschaft (198)
- Department Erziehungswissenschaft (188)
- Historisches Institut (170)
- Institut für Romanistik (162)
- Fachgruppe Volkswirtschaftslehre (161)
- Institut für Germanistik (153)
- Philosophische Fakultät (129)
- Institut für Jüdische Studien und Religionswissenschaft (115)
- Öffentliches Recht (108)
- Interdisziplinäres Zentrum für Dynamik komplexer Systeme (88)
- Wirtschafts- und Sozialwissenschaftliche Fakultät (82)
- Fachgruppe Soziologie (69)
- Center for Economic Policy Analysis (CEPA) (68)
- Fakultät für Gesundheitswissenschaften (64)
- Institut für Philosophie (61)
- Strukturbereich Bildungswissenschaften (59)
- Department für Inklusionspädagogik (52)
- Institut für Slavistik (50)
- Department Grundschulpädagogik (43)
- MenschenRechtsZentrum (43)
- Institut für Künste und Medien (40)
- Bürgerliches Recht (31)
- Institut für Jüdische Theologie (30)
- Interdisziplinäres Zentrum für Dünne Organische und Biochemische Schichten (26)
- Klassische Philologie (22)
- Referat für Presse- und Öffentlichkeitsarbeit (22)
- Zentrum für Gerechtigkeitsforschung (21)
- Potsdam Research Institute for Multilingualism (PRIM) (18)
- Vereinigung für Jüdische Studien e. V. (18)
- Hochschulambulanz (14)
- Lehreinheit für Wirtschafts-Arbeit-Technik (13)
- Potsdam Institute for Climate Impact Research (PIK) e. V. (12)
- Interdisziplinäres Zentrum für Biopolymere (11)
- Zentrum für Lehrerbildung und Bildungsforschung (ZeLB) (11)
- Digital Engineering Fakultät (10)
- Sonderforschungsbereich 632 - Informationsstruktur (10)
- Potsdam Transfer - Zentrum für Gründung, Innovation, Wissens- und Technologietransfer (9)
- Strafrecht (9)
- Zentrum für Umweltwissenschaften (8)
- Berlin Potsdam Research Group "The International Rule of Law - Rise or Decline?" (7)
- Department Musik und Kunst (7)
- Juristische Fakultät (6)
- Multilingualism (6)
- Zentrum für Qualitätsentwicklung in Lehre und Studium (ZfQ) (6)
- Abraham Geiger Kolleg gGmbH (5)
- Zentrum für Lern- und Lehrforschung (5)
- Forschungsbereich „Politik, Verwaltung und Management“ (4)
- Moses Mendelssohn Zentrum für europäisch-jüdische Studien e. V. (4)
- Patholinguistics/Neurocognition of Language (4)
- Akademie für Psychotherapie und Interventionsforschung GmbH (3)
- Gesundheitsmanagement (3)
- Institut für Religionswissenschaft (3)
- Psycholinguistics and Neurolinguistics (3)
- Zentrum für Sprachen und Schlüsselkompetenzen (Zessko) (3)
- An-Institute (2)
- DV und Statistik Wirtschaftswissenschaften (2)
- Interdisziplinäres Zentrum für Kognitive Studien (2)
- Senat (2)
- UP Transfer (2)
- WeltTrends e.V. Potsdam (2)
- Zentrum für Australienforschung (2)
- Applied Computational Linguistics (1)
- Botanischer Garten (1)
- Foundations of Computational Linguistics (1)
- Institut für Lebensgestaltung-Ethik-Religionskunde (1)
- Interdisziplinäres Zentrum für Massenspektronomie von Biopolymeren (1)
- Interdisziplinäres Zentrum für Musterdynamik und Angewandte Fernerkundung (1)
- Kommissionen des Senats (1)
- Kommunalwissenschaftliches Institut (1)
- Language Acquisition (1)
- Organe und Gremien (1)
- Phonology & Phonetics (1)
- Syntax, Morphology & Variability (1)
- Theodor-Fontane-Archiv (1)
- Weitere Einrichtungen (1)
Chemical Physics
(1991)
Langmuir-Blodgett(LB) multilayers were prepared from disc-shaped multiyne mesogens based on amphiphilic alkyl pentakis(aryl-ethynyl)benzene ethers. The two compounds used are characterized by five hydrophobic flexible chains and one hydrophilic substituent at the terminal position of the alkoxy chain. The LB films were analysed by X-ray scattering and spectroscopic measurements. An edge-on arrangement of the two discotic pentaalkynes within Y-type bilayers with a different packing density proved to be possible for the LB films of both compounds.
The possibilities and limits of structure refinement of Langmuir-Blodgett films by means of symmetrical reflection of X- rays are described using the example of a stearic acid multilayer. Three different techniques for the determiantion of the electron density profile from reflectivity data are compared; a Fourier method, a Patterson method, and model calculations. The important role of the a priori information for finding the besft structure model is outlined.
Combining issues of "girl-suited" science teaching, STS and constructivism in a physics textbook
(1992)
Models of chaotic inflation
(1992)
Factorization of operator ideals and boundes sets in tensor products of locally convex spaces
(1992)
Content Social stereotypes and responsibility attributions to victims of rape Atributing responsibillty to rape victims: a German study Rape myth acceptance and responsibility judgments: a British study Police officers' definitions of rape A study on cognitive prototypes of rape Conclusion References
We look for structural properties in the light curve of the dwarf nova SS Cyg by means of techniques from nonlinear dynamics. Applying the popular Grassberger-Procaccia procedure, Cannizzo and Goddings (1988) showed that there is no evidence for a low-dimensional attractor underlying this record. Because there are some hints for order in the light curve, we search for other signatures of deterministic systems. Therefore, we use other methods recently developed in this theory, such as local linear prediction and recurrence maps. Our main findings are: i] the prediction error grows exponentially during outburst phases, but via a power law in the quiescent states, ii] there are some rather regular patterns in this light curve which sometimes recur, but the recurrence is not regular. This leads to the following conclusions: i] The outburst dynamics shows a higher degree of order than the quiescent one. There are some hints for deterministic chaos in the outburst behavior. ii] The light curve is a complex mixture of deterministic and stochastic structures. The analysis presented in this paper shows that methods of nonlinear dynamics can be an efficient tool for the study of complex processes, even if there is no evidence for a low-dimensional attractor.
Using quantities of symbolic dynamics, such as mutual information, Shannon information and algorithmic complexity, we have searched for interrelations of spikes emitted simultaneously at different frequencies during the impulsive phase of a flare event. As the spikes are related to the flare energy release and are interpreted as emissions originating at different sites having different magnetic field strengths, any relation in frequency is interpretated as a relation in space. This approach is appropriate to characterize such spatio-temporal patterns, whereas the popular estimate of fractal dimensions can be applied to low-dimensional systems only. Depending on the energy release and emission processes, two types of fragmentation are possible: a scenario of global organization (spikes are emitted in a succession of similar events by the same system) or a scenario of local organization (many systems triggered by an initial event). Mutual information which is a generalization of correlation indicates a relation in frequency beyond the bandwidth of individual spikes. The scans in the spectrograms with large mutual information also show a low level of Shannon information and algorithmic complexity, indicating that the simultaneous appearance of spikes at other frequencies is not a completely stochastic phenomenon (white noise). It may be caused by a nonlinear deterministic system or by a Markov process. By means of mutual information we find a memory over frequency intervals up to 60 MHz. Shannon information and algorithmic complexity concern the mbox{whole} frequency region, i.e. the global source region. A global organization is also apparent in quasi-periodic changes of the Shannon information and algorithmic complexity in the range of 2 - 8 seconds. The finding is compatible with a scenario of local organization in which the information of one event spreads spatially and triggers further events at different places. The region is not an ensemble of independently flashing sources, each representing a system that cascades in energy after an initial trigger. On the contrary, there is a causal connection between the sources at any time. The analysis of the four spike events suggests that the structure in frequency is not stochastic but a process in which spikes at nearby locations are simultaneously triggered by a common exciter.
Sequential and coordinative complexity : age-based processing limitations in figural transformation
(1993)
Dimensions of cognitive complexity in figural transformations were examined in the context of adult age differences. Sequential complexity was manipulated through figural transformations of single objects in a multiple- object array. Coordinative complexity was induced through spatial or nonspatial transformations of the entire array. Results confirmed the prediction that age-related slowing is larger in coordinative complexity than in sequential complexity conditions. The effect was stable across 8 sessions (Exp 1), was obtained when age groups were equated in accuracy with criterion-referenced testing (Exp 2), and was corroborated by age-differential probabilities of error types (Exps 1 and 2). A model is proposed attributing age effects under coordinative complexity to 2 factors: (1) basic- level slowing and (2) time-consuming reiterations through the processing sequence due to age-related working memory failures. (PsycINFO Database Record (c) 2012 APA, all rights reserved)