@masterthesis{Wolfram2013, type = {Bachelor Thesis}, author = {Wolfram, Jaqueline}, title = {"Ich schreibe, solange ich lebe" : Schreiben {\"u}ber die Shoah - der Holocaust{\"u}berlebende und Autor Noah Klieger}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-67327}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {Der israelische Autor und Journalist Noah Klieger ist in der deutschsprachigen Forschung zur Holocaustliteratur, in deren Kontext theoretische Konzepte und Interpretationen zahlreicher Autoren (u.a. Ruth Kl{\"u}ger, Primo Levi) dieser Gattung vorliegen, bisher kaum beachtet worden. In der vorliegenden Arbeit steht seine 2010 erschienene Autobiographie „Zw{\"o}lf Br{\"o}tchen zum Fr{\"u}hst{\"u}ck" im Zentrum. Innerhalb der Textanalyse wird der Frage nachgegangen, welche Bedeutung das Schreiben f{\"u}r Klieger hat und inwieweit seine als Reportage angelegte Autobiographie, die den sehr faktenbezogenen und dokumentarischen Stil des Journalisten widerspiegelt, den Rezipienten in der Interpretation lenkt und Authentizit{\"a}t erzeugt. Ausgehend von dieser Fragestellung werden f{\"u}r die Arbeit gef{\"u}hrte Interviews mit Noah Klieger (oral history) einbezogen und der Erlebnisbericht „Ich habe den Todesengel {\"u}berlebt" von Eva Mozes-Kor, die das Konzept des Erlebnisberichtes mit all seinen Eigenschaften konstant bewahrt, zum Vergleich hinzugezogen. Im Fokus der Arbeit steht die Analyse der Autobiographie Kliegers, wobei auf das Genre Reportage, relevante Stilmittel, zentrale Begrifflichkeiten und Ver{\"o}ffentlichungskontexte sowie auf die Ged{\"a}chtnistheorie von Maurice Halbwachs eingegangen werden. Abschließend wird die Thematik des Vergebens bei Klieger und Mozes-Kor er{\"o}rtert. Die Forschungsergebnisse stellen den israelischen Holocaust{\"u}berlebenden Noah Klieger als Autor vor und verdeutlichen, dass die innerhalb der Gattung Holocaustliteratur gew{\"a}hlten Darstellungsweisen unterschiedliche Formen von Authentizit{\"a}t evozieren.}, language = {de} } @masterthesis{Koppermann2013, type = {Bachelor Thesis}, author = {Koppermann, Ulrike}, title = {"Indem wir die Dichtung zur Angelegenheit existentieller Entschl{\"u}sse der Dichter machen..."}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-70485}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {Von einer kritischen Analyse des Artikels "Deutsche Literatur in der Entscheidung" (1947) von Alfred Andersch ausgehend, fragt die Untersuchung nach dem Spannungsverh{\"a}ltnis von literarischem Engagement im Sinne Sartres und konzeptuellen Leerstellen in der Auseinandersetzung mit der deutschen NS-Vergangenheit, welches sich in dem programmatischen Aufsatz und Anderschs Roman "Die Rote" (1972) nachweisen l{\"a}sst.}, language = {de} } @article{Bruening2013, author = {Br{\"u}ning, Christoph}, title = {(Verfassungs-) Rechtliche Maßst{\"a}be an Funktional- und Territorialreformen}, series = {KWI-Schriften}, journal = {KWI-Schriften}, number = {7}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1867-951X}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-65382}, pages = {27 -- 46}, year = {2013}, abstract = {I. Problemeinf{\"u}hrung II. Reformdimensionen III. Anwendungsf{\"a}lle und Gr{\"u}nde IV. Der (verfassungs-)rechtliche Rahmen V. Ausgestaltung und Konsequenzen VI. Fazit}, language = {de} } @article{SentanceHodges2013, author = {Sentance, Sue and Hodges, Steve}, title = {.NET Gadgeteer Workshop}, series = {Commentarii informaticae didacticae : (CID)}, journal = {Commentarii informaticae didacticae : (CID)}, number = {6}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1868-0844}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-64654}, pages = {159}, year = {2013}, language = {en} } @article{Rasumny2013, author = {Rasumny, Wiebke}, title = {1. Workshop des wissenschaftlichen Nachwuchses in der Genisa-Forschungsstelle Veitsh{\"o}chheim}, series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien e.V.}, journal = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien e.V.}, number = {19}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1614-6492}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-67161}, pages = {223 -- 226}, year = {2013}, abstract = {Die Idee f{\"u}r den Workshop war entstanden im Rahmen der Nachwuchstagung Judaistik/J{\"u}dische Studien der Vereinigung f{\"u}r J{\"u}dische Studien e. V., die im Februar 2012 in Bamberg stattgefunden hatte. Dort {\"a}ußerte sich ein großer Bedarf nach gr{\"o}ßerer {\"u}berregionaler Vernetzung. Als sehr w{\"u}nschenswert wurde festgehalten, in Erg{\"a}nzung zur Nachwuchstagung auch regelm{\"a}ßige Treffen in kleineren Arbeitsgruppen zu etablieren. Der Workshop in Veitsh{\"o}chheim war die erste Veranstaltung, die diese Idee zeitnah, acht Monate nach der Nachwuchstagung, umsetzte. Der Workshop fand in Kooperation zwischen der Vereinigung f{\"u}r J{\"u}dische Studien mit dem Lehrstuhl f{\"u}r fr{\"a}nkische Landesgeschichte an der Universit{\"a}t W{\"u}rzburg statt.}, language = {de} } @phdthesis{Amour2013, author = {Amour, Fr{\´e}d{\´e}ric}, title = {3-D modeling of shallow-water carbonate systems : a scale-dependent approach based on quantitative outcrop studies}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-66621}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {The study of outcrop modeling is located at the interface between two fields of expertise, Sedimentology and Computing Geoscience, which respectively investigates and simulates geological heterogeneity observed in the sedimentary record. During the last past years, modeling tools and techniques were constantly improved. In parallel, the study of Phanerozoic carbonate deposits emphasized the common occurrence of a random facies distribution along single depositional domain. Although both fields of expertise are intrinsically linked during outcrop simulation, their respective advances have not been combined in literature to enhance carbonate modeling studies. The present study re-examines the modeling strategy adapted to the simulation of shallow-water carbonate systems, based on a close relationship between field sedimentology and modeling capabilities. In the present study, the evaluation of three commonly used algorithms Truncated Gaussian Simulation (TGSim), Sequential Indicator Simulation (SISim), and Indicator Kriging (IK), were performed for the first time using visual and quantitative comparisons on an ideally suited carbonate outcrop. The results show that the heterogeneity of carbonate rocks cannot be fully simulated using one single algorithm. The operating mode of each algorithm involves capabilities as well as drawbacks that are not capable to match all field observations carried out across the modeling area. Two end members in the spectrum of carbonate depositional settings, a low-angle Jurassic ramp (High Atlas, Morocco) and a Triassic isolated platform (Dolomites, Italy), were investigated to obtain a complete overview of the geological heterogeneity in shallow-water carbonate systems. Field sedimentology and statistical analysis performed on the type, morphology, distribution, and association of carbonate bodies and combined with palaeodepositional reconstructions, emphasize similar results. At the basin scale (x 1 km), facies association, composed of facies recording similar depositional conditions, displays linear and ordered transitions between depositional domains. Contrarily, at the bedding scale (x 0.1 km), individual lithofacies type shows a mosaic-like distribution consisting of an arrangement of spatially independent lithofacies bodies along the depositional profile. The increase of spatial disorder from the basin to bedding scale results from the influence of autocyclic factors on the transport and deposition of carbonate sediments. Scale-dependent types of carbonate heterogeneity are linked with the evaluation of algorithms in order to establish a modeling strategy that considers both the sedimentary characteristics of the outcrop and the modeling capabilities. A surface-based modeling approach was used to model depositional sequences. Facies associations were populated using TGSim to preserve ordered trends between depositional domains. At the lithofacies scale, a fully stochastic approach with SISim was applied to simulate a mosaic-like lithofacies distribution. This new workflow is designed to improve the simulation of carbonate rocks, based on the modeling of each scale of heterogeneity individually. Contrarily to simulation methods applied in literature, the present study considers that the use of one single simulation technique is unlikely to correctly model the natural patterns and variability of carbonate rocks. The implementation of different techniques customized for each level of the stratigraphic hierarchy provides the essential computing flexibility to model carbonate systems. Closer feedback between advances carried out in the field of Sedimentology and Computing Geoscience should be promoted during future outcrop simulations for the enhancement of 3-D geological models.}, language = {en} } @phdthesis{Holz2013, author = {Holz, Christian}, title = {3D from 2D touch}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-67796}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {While interaction with computers used to be dominated by mice and keyboards, new types of sensors now allow users to interact through touch, speech, or using their whole body in 3D space. These new interaction modalities are often referred to as "natural user interfaces" or "NUIs." While 2D NUIs have experienced major success on billions of mobile touch devices sold, 3D NUI systems have so far been unable to deliver a mobile form factor, mainly due to their use of cameras. The fact that cameras require a certain distance from the capture volume has prevented 3D NUI systems from reaching the flat form factor mobile users expect. In this dissertation, we address this issue by sensing 3D input using flat 2D sensors. The systems we present observe the input from 3D objects as 2D imprints upon physical contact. By sampling these imprints at very high resolutions, we obtain the objects' textures. In some cases, a texture uniquely identifies a biometric feature, such as the user's fingerprint. In other cases, an imprint stems from the user's clothing, such as when walking on multitouch floors. By analyzing from which part of the 3D object the 2D imprint results, we reconstruct the object's pose in 3D space. While our main contribution is a general approach to sensing 3D input on 2D sensors upon physical contact, we also demonstrate three applications of our approach. (1) We present high-accuracy touch devices that allow users to reliably touch targets that are a third of the size of those on current touch devices. We show that different users and 3D finger poses systematically affect touch sensing, which current devices perceive as random input noise. We introduce a model for touch that compensates for this systematic effect by deriving the 3D finger pose and the user's identity from each touch imprint. We then investigate this systematic effect in detail and explore how users conceptually touch targets. Our findings indicate that users aim by aligning visual features of their fingers with the target. We present a visual model for touch input that eliminates virtually all systematic effects on touch accuracy. (2) From each touch, we identify users biometrically by analyzing their fingerprints. Our prototype Fiberio integrates fingerprint scanning and a display into the same flat surface, solving a long-standing problem in human-computer interaction: secure authentication on touchscreens. Sensing 3D input and authenticating users upon touch allows Fiberio to implement a variety of applications that traditionally require the bulky setups of current 3D NUI systems. (3) To demonstrate the versatility of 3D reconstruction on larger touch surfaces, we present a high-resolution pressure-sensitive floor that resolves the texture of objects upon touch. Using the same principles as before, our system GravitySpace analyzes all imprints and identifies users based on their shoe soles, detects furniture, and enables accurate touch input using feet. By classifying all imprints, GravitySpace detects the users' body parts that are in contact with the floor and then reconstructs their 3D body poses using inverse kinematics. GravitySpace thus enables a range of applications for future 3D NUI systems based on a flat sensor, such as smart rooms in future homes. We conclude this dissertation by projecting into the future of mobile devices. Focusing on the mobility aspect of our work, we explore how NUI devices may one day augment users directly in the form of implanted devices.}, language = {en} } @misc{GschwindKressigLacroixetal.2013, author = {Gschwind, Yves J. and Kressig, Reto W. and Lacroix, Andre and M{\"u}hlbauer, Thomas and Pfenninger, Barbara and Granacher, Urs}, title = {A best practice fall prevention exercise program to improve balance, strength/power, and psychosocial health in older adults}, series = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, number = {604}, issn = {1866-8364}, doi = {10.25932/publishup-42710}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-427104}, pages = {15}, year = {2013}, abstract = {Background: With increasing age neuromuscular deficits (e.g., sarcopenia) may result in impaired physical performance and an increased risk for falls. Prominent intrinsic fall-risk factors are age-related decreases in balance and strength / power performance as well as cognitive decline. Additional studies are needed to develop specifically tailored exercise programs for older adults that can easily be implemented into clinical practice. Thus, the objective of the present trial is to assess the effects of a fall prevention program that was developed by an interdisciplinary expert panel on measures of balance, strength / power, body composition, cognition, psychosocial well-being, and falls self-efficacy in healthy older adults. Additionally, the time-related effects of detraining are tested. Methods/Design: Healthy old people (n = 54) between the age of 65 to 80 years will participate in this trial. The testing protocol comprises tests for the assessment of static / dynamic steady-state balance (i.e., Sharpened Romberg Test, instrumented gait analysis), proactive balance (i.e., Functional Reach Test; Timed Up and Go Test), reactive balance (i.e., perturbation test during bipedal stance; Push and Release Test), strength (i.e., hand grip strength test; Chair Stand Test), and power (i.e., Stair Climb Power Test; countermovement jump). Further, body composition will be analysed using a bioelectrical impedance analysis system. In addition, questionnaires for the assessment of psychosocial (i.e., World Health Organisation Quality of Life Assessment-Bref), cognitive (i.e., Mini Mental State Examination), and fall risk determinants (i.e., Fall Efficacy Scale -International) will be included in the study protocol. Participants will be randomized into two intervention groups or the control / waiting group. After baseline measures, participants in the intervention groups will conduct a 12-week balance and strength / power exercise intervention 3 times per week, with each training session lasting 30 min. (actual training time). One intervention group will complete an extensive supervised training program, while the other intervention group will complete a short version (` 3 times 3') that is home-based and controlled by weekly phone calls. Post-tests will be conducted right after the intervention period. Additionally, detraining effects will be measured 12 weeks after program cessation. The control group / waiting group will not participate in any specific intervention during the experimental period, but will receive the extensive supervised program after the experimental period. Discussion: It is expected that particularly the supervised combination of balance and strength / power training will improve performance in variables of balance, strength / power, body composition, cognitive function, psychosocial well-being, and falls self-efficacy of older adults. In addition, information regarding fall risk assessment, dose-response-relations, detraining effects, and supervision of training will be provided. Further, training-induced health-relevant changes, such as improved performance in activities of daily living, cognitive function, and quality of life, as well as a reduced risk for falls may help to lower costs in the health care system. Finally, practitioners, therapists, and instructors will be provided with a scientifically evaluated feasible, safe, and easy-to-administer exercise program for fall prevention.}, language = {en} } @unpublished{FedchenkoTarkhanov2013, author = {Fedchenko, Dmitry and Tarkhanov, Nikolai Nikolaevich}, title = {A Class of Toeplitz Operators in Several Variables}, issn = {2193-6943}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-68932}, year = {2013}, abstract = {We introduce the concept of Toeplitz operator associated with the Laplace-Beltrami operator on a compact Riemannian manifold with boundary. We characterise those Toeplitz operators which are Fredholm, thus initiating the index theory.}, language = {en} } @article{DagieneJevsikovaSchuleetal.2013, author = {Dagiene, Valentina and Jevsikova, Tatjana and Schule, Carsten and Sentance, Sue and Thota, Neena}, title = {A comparison of current trends within computer science teaching in school in Germany and the UK}, series = {Commentarii informaticae didacticae : (CID)}, journal = {Commentarii informaticae didacticae : (CID)}, number = {6}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1868-0844}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-64504}, pages = {63 -- 75}, year = {2013}, abstract = {In the last two years, CS as a school subject has gained a lot of attention worldwide, although different countries have differing approaches to and experiences of introducing CS in schools. This paper reports on a study comparing current trends in CS at school, with a major focus on two countries, Germany and UK. A survey was carried out of a number of teaching professionals and experts from the UK and Germany with regard to the content and delivery of CS in school. An analysis of the quantitative data reveals a difference in foci in the two countries; putting this into the context of curricular developments we are able to offer interpretations of these trends and suggest ways in which curricula in CS at school should be moving forward.}, language = {en} } @unpublished{Wallenta2013, author = {Wallenta, Daniel}, title = {A Lefschetz fixed point formula for elliptic quasicomplexes}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-67016}, year = {2013}, abstract = {In a recent paper with N. Tarkhanov, the Lefschetz number for endomorphisms (modulo trace class operators) of sequences of trace class curvature was introduced. We show that this is a well defined, canonical extension of the classical Lefschetz number and establish the homotopy invariance of this number. Moreover, we apply the results to show that the Lefschetz fixed point formula holds for geometric quasiendomorphisms of elliptic quasicomplexes.}, language = {en} } @article{Weise2013, author = {Weise, Martin}, title = {A model for teaching informatics to German secondary school students in English-language bilingual education}, series = {Commentarii informaticae didacticae : (CID)}, journal = {Commentarii informaticae didacticae : (CID)}, number = {6}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1868-0844}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-64568}, pages = {127 -- 137}, year = {2013}, abstract = {Informatics as a school subject has been virtually absent from bilingual education programs in German secondary schools. Most bilingual programs in German secondary education started out by focusing on subjects from the field of social sciences. Teachers and bilingual curriculum experts alike have been regarding those as the most suitable subjects for bilingual instruction - largely due to the intercultural perspective that a bilingual approach provides. And though one cannot deny the gain that ensues from an intercultural perspective on subjects such as history or geography, this benefit is certainly not limited to social science subjects. In consequence, bilingual curriculum designers have already begun to include other subjects such as physics or chemistry in bilingual school programs. It only seems a small step to extend this to informatics. This paper will start out by addressing potential benefits of adding informatics to the range of subjects taught as part of English-language bilingual programs in German secondary education. In a second step it will sketch out a methodological (= didactical) model for teaching informatics to German learners through English. It will then provide two items of hands-on and tested teaching material in accordance with this model. The discussion will conclude with a brief outlook on the chances and prerequisites of firmly establishing informatics as part of bilingual school curricula in Germany.}, language = {en} } @phdthesis{RudolphMohr2013, author = {Rudolph-Mohr, Nicole}, title = {A novel non-invasive optical method for quantitative visualization of pH and oxygen dynamics in soils}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-66993}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {In soils and sediments there is a strong coupling between local biogeochemical processes and the distribution of water, electron acceptors, acids and nutrients. Both sides are closely related and affect each other from small scale to larger scales. Soil structures such as aggregates, roots, layers or macropores enhance the patchiness of these distributions. At the same time it is difficult to access the spatial distribution and temporal dynamics of these parameter. Noninvasive imaging techniques with high spatial and temporal resolution overcome these limitations. And new non-invasive techniques are needed to study the dynamic interaction of plant roots with the surrounding soil, but also the complex physical and chemical processes in structured soils. In this study we developed an efficient non-destructive in-situ method to determine biogeochemical parameters relevant to plant roots growing in soil. This is a quantitative fluorescence imaging method suitable for visualizing the spatial and temporal pH changes around roots. We adapted the fluorescence imaging set-up and coupled it with neutron radiography to study simultaneously root growth, oxygen depletion by respiration activity and root water uptake. The combined set up was subsequently applied to a structured soil system to map the patchy structure of oxic and anoxic zones induced by a chemical oxygen consumption reaction for spatially varying water contents. Moreover, results from a similar fluorescence imaging technique for nitrate detection were complemented by a numerical modeling study where we used imaging data, aiming to simulate biodegradation under anaerobic, nitrate reducing conditions.}, language = {en} } @misc{ThielZehbeRoeseretal.2013, author = {Thiel, Kerstin and Zehbe, Rolf and Roeser, Jer{\^o}m{\´e} and Strauch, Peter and Enthaler, Stephan and Thomas, Arne}, title = {A polymer analogous reaction for the formation of imidazolium and NHC based porous polymer networks}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-95118}, pages = {1848 -- 1856}, year = {2013}, abstract = {A polymer analogous reaction was carried out to generate a porous polymeric network with N-heterocyclic carbenes (NHC) in the polymer backbone. Using a stepwise approach, first a polyimine network is formed by polymerization of the tetrafunctional amine tetrakis(4-aminophenyl)methane. This polyimine network is converted in the second step into polyimidazolium chloride and finally to a polyNHC network. Furthermore a porous Cu(II)-coordinated polyNHC network can be generated. Supercritical drying generates polymer networks with high permanent surface areas and porosities which can be applied for different catalytic reactions. The catalytic properties were demonstrated for example in the activation of CO2 or in the deoxygenation of sulfoxides to the corresponding sulfides.}, language = {en} } @unpublished{KellerRoellyValleriani2013, author = {Keller, Peter and Roelly, Sylvie and Valleriani, Angelo}, title = {A quasi-random-walk to model a biological transport process}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-63582}, year = {2013}, abstract = {Transport Molecules play a crucial role for cell viability. Amongst others, linear motors transport cargos along rope-like structures from one location of the cell to another in a stochastic fashion. Thereby each step of the motor, either forwards or backwards, bridges a fixed distance. While moving along the rope the motor can also detach and is lost. We give here a mathematical formalization of such dynamics as a random process which is an extension of Random Walks, to which we add an absorbing state to model the detachment of the motor from the rope. We derive particular properties of such processes that have not been available before. Our results include description of the maximal distance reached from the starting point and the position from which detachment takes place. Finally, we apply our theoretical results to a concrete established model of the transport molecule Kinesin V.}, language = {en} } @misc{InalKoelschSellrieetal.2013, author = {Inal, Sahika and K{\"o}lsch, Jonas D. and Sellrie, Frank and Schenk, J{\"o}rg A. and Wischerhoff, Erik and Laschewsky, Andr{\´e} and Neher, Dieter}, title = {A water soluble fluorescent polymer as a dual colour sensor for temperature and a specific protein}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-95336}, pages = {6373 -- 6381}, year = {2013}, abstract = {We present two thermoresponsive water soluble copolymers prepared via free radical statistical copolymerization of N-isopropylacrylamide (NIPAm) and of oligo(ethylene glycol) methacrylates (OEGMAs), respectively, with a solvatochromic 7-(diethylamino)-3-carboxy-coumarin (DEAC)- functionalized monomer. In aqueous solutions, the NIPAm-based copolymer exhibits characteristic changes in its fluorescence profile in response to a change in solution temperature as well as to the presence of a specific protein, namely an anti-DEAC antibody. This polymer emits only weakly at low temperatures, but exhibits a marked fluorescence enhancement accompanied by a change in its emission colour when heated above its cloud point. Such drastic changes in the fluorescence and absorbance spectra are observed also upon injection of the anti-DEAC antibody, attributed to the specific binding of the antibody to DEAC moieties. Importantly, protein binding occurs exclusively when the polymer is in the well hydrated state below the cloud point, enabling a temperature control on the molecular recognition event. On the other hand, heating of the polymer-antibody complexes releases a fraction of the bound antibody. In the presence of the DEAC-functionalized monomer in this mixture, the released antibody competitively binds to the monomer and the antibody-free chains of the polymer undergo a more effective collapse and inter-aggregation. In contrast, the emission properties of the OEGMA-based analogous copolymer are rather insensitive to the thermally induced phase transition or to antibody binding. These opposite behaviours underline the need for a carefully tailored molecular design of responsive polymers aimed at specific applications, such as biosensing.}, language = {en} } @article{Anisimov2013, author = {Anisimov, Aleksey V.}, title = {Abh{\"a}ngigkeitsformen von Unternehmen im russischen Recht}, series = {Zweite Woche des Russischen Rechts, Potsdam, 14.-18.05.2012}, journal = {Zweite Woche des Russischen Rechts, Potsdam, 14.-18.05.2012}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-66445}, pages = {41 -- 45}, year = {2013}, language = {de} } @phdthesis{Lemke2013, author = {Lemke, Karina}, title = {Abtrennung und Charakterisierung von Polyelektrolyt-modifizierten Nanopartikeln}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-68133}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {Gegenstand der Dissertation ist die gr{\"o}ßen- und eigenschaftsoptimierte Synthese und Charakterisierung von anorganischen Nanopartikeln in einer geeigneten Polyelektrolytmodifizierten Mikroemulsion. Das Hauptziel bildet dabei die Auswahl einer geeigneten Mikroemulsion, zur Synthese von kleinen, stabilen, reproduzierbaren Nanopartikeln mit besonderen Eigenschaften. Die vorliegende Arbeit wurde in zwei Haupteile gegliedert. Der erste Teil befasst sich mit der Einmischung von unterschiedlichen Polykationen (lineares Poly (diallyldimethylammoniumchlorid) (PDADMAC) und verzweigtes Poly (ethylenimin) (PEI)) in verschiedene, auf unterschiedlichen Tensiden (CTAB - kationisch, SDS - anionisch, SB - zwitterionisch) basierenden, Mikroemulsionssysteme. Dabei zeigt sich, dass das Einmischen der Polykationen in die Wassertr{\"o}pfchen der Wasser-in-{\"O}l (W/O) Mikroemulsion prinzipiell m{\"o}glich ist. Der Einfluss der verschiedenen Polykationen auf das Phasenverhalten der W/O Mikroemulsion ist jedoch sehr unterschiedlich. In Gegenwart des kationischen Tensids f{\"u}hren die repulsiven Wechselwirkungen mit den Polykationen zu einer Destabilisierung des Systems, w{\"a}hrend die ausgepr{\"a}gten Wechselwirkungen mit dem anionischen Tensid in einer deutlichen Stabilisierung des Systems resultieren. F{\"u}r das zwitterionische Tensid f{\"u}hren die moderaten Wechselwirkungen mit den Polykationen zu einer partiellen Stabilisierung. Der zweite Teil der Arbeit besch{\"a}ftigt sich mit dem Einsatz der unterschiedlichen, Polyelektrolyt- modifizierten Mikroemulsionen als Templatphase f{\"u}r die Herstellung verschiedener, anorganischer Nanopartikel. Die CTAB-basierte Mikroemulsion erweist sich dabei als ungeeignet f{\"u}r die Herstellung von CdS Nanopartikeln, da zum einen nur eine geringe Toleranz gegen{\"u}ber den Reaktanden vorhanden ist (Destabilisierungseffekt) und zum anderen das Partikelwachstum durch den Polyelektrolyt-Tensid-Film nicht ausreichend begrenzt wird. Zudem zeigt sich, dass eine Abtrennung der Partikel aus der Mikroemulsion nicht m{\"o}glich ist. Die SDS-basierten Mikroemulsionen, erweisen sich als geeignete Templatphase zur Synthese kleiner anorganischer Nanopartikel (3 - 20 nm). Sowohl CdS Quantum Dots, als auch Gold Nanopartikel konnten erfolgreich in der Mikroemulsion synthetisiert werden, wobei das verzweigte PEI einen interessanten Templat-Effekt in der Mikroemulsion hervorruft. Als deutlicher Nachteil der SDS-basierten Mikroemulsionen offenbaren sich die starken Wechselwirkungen zwischen dem Tensid und den Polyelektrolyten w{\"a}hrend der Aufarbeitung der Nanopartikel aus der Mikroemulsion. Dabei erweist sich die Polyelektrolyt-Tensid-Komplexbildung als hinderlich f{\"u}r die Redispergierung der CdS Quantum Dots in Wasser, so dass Partikelaggregation einsetzt. Die SB-basierten Mikroemulsionen erweisen sich als g{\"u}nstige Templatphase f{\"u}r die Bildung von gr{\"o}ßen- und eigenschaftenoptimierten Nanopartikeln (< 4 nm), wobei insbesondere eine Modifizierung mit PEI als ideal betrachtet werden kann. In Gegenwart des verzweigten PEI gelang es erstmals ultrakleine, fluoreszierende Gold Cluster (< 2 nm) in einer SB-basierten Mikroemulsion als Templatphase herzustellen. Als besonderer Vorteil der SB-basierten Mikroemulsion zeigen sich die moderaten Wechselwirkungen zwischen dem zwitterionischen Tensid und den Polyelektrolyten, welche eine anschließende Abtrennung der Partikel aus der Mikroemulsion unter Erhalt der Gr{\"o}ße und ihrer optischen Eigenschaften erm{\"o}glichen. In der redispergierten w{\"a}ssrigen L{\"o}sung gelang somit eine Auftrennung der PEI-modifizierten Partikel mit Hilfe der asymmetrischer Fluss Feldflussfraktionierung (aF FFF). Die gebildeten Nanopartikel zeigen interessante optische Eigenschaften und k{\"o}nnen zum Beispiel erfolgreich zur Modifizierung von Biosensoren eingesetzt werden.}, language = {de} } @article{Sass2013, author = {Sass, Enrico}, title = {Academic entrepreneurship}, series = {Erkenntnisse zum Wissens- und Technologietransfer}, journal = {Erkenntnisse zum Wissens- und Technologietransfer}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-66873}, year = {2013}, abstract = {Research on entrepreneurial motivation of university scientists is often determined by quantitative methods without taking into account context-related influences. According to different studies, entrepreneurial scientists found a spin-off company due to motives like independency, market opportunity, money or risk of unemployment (short-term contracts). To give a comprehensive explanation, it is important to use a qualitative research view that considers academic rank, norms and values of university scientists. The author spoke with 35 natural scientists and asked professors and research fellows for their entrepreneurial motivation. The results of this study are used to develop a typology of entrepreneurial and non-entrepreneurial scientists within German universities. This paper presents the key findings of the study (Sass 2011).}, language = {en} } @book{Mickiewicz2013, author = {Mickiewicz, Adam}, title = {Adam Mickiewicz}, series = {Potsdamer Beitr{\"a}ge zur Sorabistik}, journal = {Potsdamer Beitr{\"a}ge zur Sorabistik}, editor = {Norberg, Madlena and Kosta, Peter}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-205-6}, issn = {1615-2476}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60508}, publisher = {Universit{\"a}t Potsdam}, pages = {235}, year = {2013}, abstract = {Die vorliegende Ausgabe der „Potsdamer Beitr{\"a}ge zur Sorabistik - Podstupimske pśinoski k Sorabistice" Adam Mickiewicz, Gedichte in sorbischer {\"U}bersetzung, zusammengestellt von Alfred Měškank stellt den Jubil{\"a}umsband Nr. 10 unserer Serie dar. Wir sind sehr stolz darauf, die Serie herausgeben zu d{\"u}rfen und vor allem darauf, das Jubil{\"a}um mit so einem w{\"u}rdigen Inhalt zu begehen. Adam Mickiewicz (1798-1855) gilt als der gr{\"o}ßte polnische Dichter, vergleichbar mit J. W. v. Goethe in Deutschland oder John Byron in England. Seine Werke sind in viele Sprachen {\"u}bersetzt und dadurch in der ganzen Welt bekannt geworden. Bedeutende sorbische Dichter und {\"U}bersetzer, wie z.B. Jakub Bart-Ćišinski und Otto Lehmann-Wićaz haben seine Gedichte auch ins Sorbische {\"u}bersetzt, doch diese {\"U}bersetzungen sind verstreut und dem heutigen Interessenten kaum zug{\"a}nglich. Einige seiner bedeutsamsten Werke, besonders sein Versepos „Pan Tadeusz", sowie Teile seines dramatischen Werkes „Dziady" fanden erst in neuerer Zeit einen {\"U}bersetzer. Die vorliegende Edition, die eine Zusammenstellung aller bisher ins Sorbische/Wendische {\"u}bersetzten Werke des großen polnischen Dichters der Romantik darstellt, schließt diese L{\"u}cke nun.}, language = {mul} } @book{AsheuerBelgassemEichornetal.2013, author = {Asheuer, Susanne and Belgassem, Joy and Eichorn, Wiete and Leipold, Rio and Licht, Lucas and Meinel, Christoph and Schanz, Anne and Schnjakin, Maxim}, title = {Akzeptanz und Nutzerfreundlichkeit der AusweisApp : eine qualitative Untersuchung ; eine Studie am Hasso-Plattner-Institut f{\"u}r Softwaresystemtechnik im Auftrag des Bundesministeriums des Innern}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-229-2}, issn = {1613-5652}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-63971}, publisher = {Universit{\"a}t Potsdam}, pages = {83}, year = {2013}, abstract = {F{\"u}r die vorliegende Studie »Qualitative Untersuchung zur Akzeptanz des neuen Personalausweises und Erarbeitung von Vorschl{\"a}gen zur Verbesserung der Usability der Software AusweisApp« arbeitete ein Innovationsteam mit Hilfe der Design Thinking Methode an der Aufgabenstellung »Wie k{\"o}nnen wir die AusweisApp f{\"u}r Nutzer intuitiv und verst{\"a}ndlich gestalten?« Zun{\"a}chst wurde die Akzeptanz des neuen Personalausweises getestet. B{\"u}rger wurden zu ihrem Wissensstand und ihren Erwartungen hinsichtlich des neuen Personalausweises befragt, dar{\"u}ber hinaus zur generellen Nutzung des neuen Personalausweises, der Nutzung der Online-Ausweisfunktion sowie der Usability der AusweisApp. Weiterhin wurden Nutzer bei der Verwendung der aktuellen AusweisApp beobachtet und anschließend befragt. Dies erlaubte einen tiefen Einblick in ihre Bed{\"u}rfnisse. Die Ergebnisse aus der qualitativen Untersuchung wurden verwendet, um Verbesserungsvorschl{\"a}ge f{\"u}r die AusweisApp zu entwickeln, die den Bed{\"u}rfnissen der B{\"u}rger entsprechen. Die Vorschl{\"a}ge zur Optimierung der AusweisApp wurden prototypisch umgesetzt und mit potentiellen Nutzern getestet. Die Tests haben gezeigt, dass die entwickelten Neuerungen den B{\"u}rgern den Zugang zur Nutzung der Online-Ausweisfunktion deutlich vereinfachen. Im Ergebnis konnte festgestellt werden, dass der Akzeptanzgrad des neuen Personalausweises stark divergiert. Die Einstellung der Befragten reichte von Skepsis bis hin zu Bef{\"u}rwortung. Der neue Personalausweis ist ein Thema, das den B{\"u}rger polarisiert. Im Rahmen der Nutzertests konnten zahlreiche Verbesserungspotenziale des bestehenden Service Designs sowohl rund um den neuen Personalausweis, als auch im Zusammenhang mit der verwendeten Software aufgedeckt werden. W{\"a}hrend der Nutzertests, die sich an die Ideen- und Prototypenphase anschlossen, konnte das Innovtionsteam seine Vorschl{\"a}ge iterieren und auch verifizieren. Die ausgearbeiteten Vorschl{\"a}ge beziehen sich auf die AusweisApp. Die neuen Funktionen umfassen im Wesentlichen: · den direkten Zugang zu den Diensteanbietern, · umfangreiche Hilfestellungen (Tooltips, FAQ, Wizard, Video), · eine Verlaufsfunktion, · einen Beispieldienst, der die Online-Ausweisfunktion erfahrbar macht. Insbesondere gilt es, den Nutzern mit der neuen Version der AusweisApp Anwendungsfelder f{\"u}r ihren neuen Personalausweis und einen Mehrwert zu bieten. Die Ausarbeitung von weiteren Funktionen der AusweisApp kann dazu beitragen, dass der neue Personalausweis sein volles Potenzial entfalten kann.}, language = {de} } @book{Xhindi2013, author = {Xhindi, Nevila}, title = {Albania towards a sustainable regional development}, series = {Praxis Kultur- und Sozialgeographie | PKS}, journal = {Praxis Kultur- und Sozialgeographie | PKS}, number = {56}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-223-0}, issn = {0934-716X}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-62691}, publisher = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {As Albania is accelerating its preparations towards the European Union candidate status, numerous areas of public policy and practices undergo intensive development processes. Regional development policy is a very new area of public policy in Albania, and needs research and development. This study focuses on the process of sustainable development in Albania, by analyzing and comparing the regional development of regions of Tirana, Shkodra and Kukes. The methodology used consists of a literature/desk review; analytical and comparative approach; qualitative interviews; quantitative data collection; analysis. The research is organized in five chapters. First chapter provides an overview of the study framework. The second outlines the theory and scientific framework for sustainable and regional development in relation with geography. The third chapter presents the picture of the regional development in Albania, analyzing the disparities and regional development in the light of EU requirements and NUTS division. Chapter 4 continues by analyzing and comparing the regional development of the regions: Tirana - driver for change, Shkodra - the North in Development and Kukes - the "shrinking" region. Chapter 5 presents the conclusions and recommendations. This research comes to the conclusions that if growth in Albania is to be increased and sustained, a regional development policy needs to be established.}, language = {en} } @article{Meier2013, author = {Meier, Martin}, title = {Alchymie, Chemie und Krieg im Zeitalter der Phlogistontheorie (17./18. Jahrhundert)}, volume = {2013}, number = {17 / 2}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-73167}, pages = {9 -- 38}, year = {2013}, language = {de} } @misc{LiBabuTurneretal.2013, author = {Li, Hongguang and Babu, Sukumaran Santhosh and Turner, Sarah T. and Neher, Dieter and Hollamby, Martin J. and Seki, Tomohiro and Yagai, Shiki and Deguchi, Yonekazu and M{\"o}hwald, Helmuth and Nakanishi, Takashi}, title = {Alkylated-C60 based soft materials}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-95358}, pages = {1943 -- 1951}, year = {2013}, abstract = {Derivatization of fullerene (C60) with branched aliphatic chains softens C60-based materials and enables the formation of thermotropic liquid crystals and room temperature nonvolatile liquids. This work demonstrates that by carefully tuning parameters such as type, number and substituent position of the branched chains, liquid crystalline C60 materials with mesophase temperatures suited for photovoltaic cell fabrication and room temperature nonvolatile liquid fullerenes with tunable viscosity can be obtained. In particular, compound 1, with branched chains, exhibits a smectic liquid crystalline phase extending from 84 °C to room temperature. Analysis of bulk heterojunction (BHJ) organic solar cells with a ca. 100 nm active layer of compound 1 and poly(3-hexylthiophene) (P3HT) as an electron acceptor and an electron donor, respectively, reveals an improved performance (power conversion efficiency, PCE: 1.6 ± 0.1\%) in comparison with another compound, 10 (PCE: 0.5 ± 0.1\%). The latter, in contrast to 1, carries linear aliphatic chains and thus forms a highly ordered solid lamellar phase at room temperature. The solar cell performance of 1 blended with P3HT approaches that of PCBM/P3HT for the same active layer thickness. This indicates that C60 derivatives bearing branched tails are a promising class of electron acceptors in soft (flexible) photovoltaic devices.}, language = {en} } @misc{JacobFleischhauerClahsen2013, author = {Jacob, Gunnar and Fleischhauer, Elisabeth and Clahsen, Harald}, title = {Allomorphy and affixation in morphological processing}, series = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe}, number = {532}, issn = {1866-8364}, doi = {10.25932/publishup-41540}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-415408}, pages = {10}, year = {2013}, abstract = {This study presents results from a cross-modal priming experiment investigating inflected verb forms of German. A group of late learners of German with Russian as their native language (L1) was compared to a control group of German L1 speakers. The experiment showed different priming patterns for the two participant groups. The L1 German data yielded a stem-priming effect for inflected forms involving regular affixation and a partial priming effect for irregular forms irrespective of stem allomorphy. By contrast, the data from the late bilinguals showed reduced priming effects for both regular and irregular forms. We argue that late learners rely more on lexically stored inflected word forms during word recognition and less on morphological parsing than native speakers.}, language = {en} } @article{ReffayMiledOrtizetal.2013, author = {Reffay, Christophe and Miled, Mahdi and Ortiz, Pascal and F{\´e}vrier, Loic}, title = {An epistemic hypermedia to learn python as a resource for an introductory course for algorithmic in France}, series = {Commentarii informaticae didacticae : (CID)}, journal = {Commentarii informaticae didacticae : (CID)}, number = {6}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1868-0844}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-64545}, pages = {111 -- 118}, year = {2013}, abstract = {We launched an original large-scale experiment concerning informatics learning in French high schools. We are using the France-IOI platform to federate resources and share observation for research. The first step is the implementation of an adaptive hypermedia based on very fine grain epistemic modules for Python programming learning. We define the necessary traces to be built in order to study the trajectories of navigation the pupils will draw across this hypermedia. It may be browsed by pupils either as a course support, or an extra help to solve the list of exercises (mainly for algorithmics discovery). By leaving the locus of control to the learner, we want to observe the different trajectories they finally draw through our system. These trajectories may be abstracted and interpreted as strategies and then compared for their relative efficiency. Our hypothesis is that learners have different profiles and may use the appropriate strategy accordingly. This paper presents the research questions, the method and the expected results.}, language = {en} } @unpublished{MakhmudovTarkhanov2013, author = {Makhmudov, Olimdjan and Tarkhanov, Nikolai Nikolaevich}, title = {An extremal problem related to analytic continuation}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-63634}, year = {2013}, abstract = {We show that the usual variational formulation of the problem of analytic continuation from an arc on the boundary of a plane domain does not lead to a relaxation of this overdetermined problem. To attain such a relaxation, we bound the domain of the functional, thus changing the Euler equations.}, language = {en} } @phdthesis{Kroener2013, author = {Kr{\"o}ner, Dominik}, title = {Analysis and control of light-induced processes in molecules: Electron and nuclear quantum dynamics for aspects of stereoisomerism and spectroscopy}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-70477}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {The habilitation thesis covers theoretical investigations on light-induced processes in molecules. The study is focussed on changes of the molecular electronic structure and geometry, caused either by photoexcitation in the event of a spectroscopic analysis, or by a selective control with shaped laser pulses. The applied and developed methods are predominantly based on quantum chemistry as well as on electron and nuclear quantum dynamics, and in parts on molecular dynamics. The studied scientific problems deal with stereoisomerism and the question of how to either switch or distinguish chiral molecules using laser pulses, and with the essentials for the simulation of the spectroscopic response of biochromophores, in order to unravel their photophysics. The accomplished findings not only explain experimental results and extend existing approaches, but also contribute significantly to the basic understanding of the investigated light-driven molecular processes. The main achievements can be divided in three parts: First, a quantum theory for an enantio- and diastereoselective or, in general, stereoselective laser pulse control was developed and successfully applied to influence the chirality of molecular switches. The proposed axially chiral molecules possess different numbers of "switchable" stable chiral conformations, with one particular switch featuring even a true achiral "off"-state which allows to enantioselectively "turn on" its chirality. Furthermore, surface mounted chiral molecular switches with several well-defined orientations were treated, where a newly devised highly flexible stochastic pulse optimization technique provides high stereoselectivity and efficiency at the same time, even for coupled chirality-changing degrees of freedom. Despite the model character of these studies, the proposed types of chiral molecular switches and, all the more, the developed basic concepts are generally applicable to design laser pulse controlled catalysts for asymmetric synthesis, or to achieve selective changes in the chirality of liquid crystals or in chiroptical nanodevices, implementable in information processing or as data storage. Second, laser-driven electron wavepacket dynamics based on ab initio calculations, namely time-dependent configuration interaction, was extended by the explicit inclusion of magnetic field-magnetic dipole interactions for the simulation of the qualitative and quantitative distinction of enantiomers in mass spectrometry by means of circularly polarized ultrashort laser pulses. The developed approach not only allows to explain the origin of the experimentally observed influence of the pulse duration on the detected circular dichroism in the ion yield, but also to predict laser pulse parameters for an optimal distinction of enantiomers by ultrashort shaped laser pulses. Moreover, these investigations in combination with the previous ones provide a fundamental understanding of the relevance of electric and magnetic interactions between linearly or non-linearly polarized laser pulses and (pro-)chiral molecules for either control by enantioselective excitation or distinction by enantiospecific excitation. Third, for selected light-sensitive biological systems of central importance, like e.g. antenna complexes of photosynthesis, simulations of processes which take place during and after photoexcitation of their chromophores were performed, in order to explain experimental (spectroscopic) findings as well as to understand the underlying photophysical and photochemical principles. In particular, aspects of normal mode mixing due to geometrical changes upon photoexcitation and their impact on (time-dependent) vibronic and resonance Raman spectra, as well as on intramolecular energy redistribution were addressed. In order to explain unresolved experimental findings, a simulation program for the calculation of vibronic and resonance Raman spectra, accounting for changes in both vibrational frequencies and normal modes, was created based on a time-dependent formalism. In addition, the influence of the biochemical environment on the electronic structure of the chromophores was studied by electrostatic interactions and mechanical embedding using hybrid quantum-classical methods. Environmental effects were found to be of importance, in particular, for the excitonic coupling of chromophores in light-harvesting complex II. Although the simulations for such highly complex systems are still restricted by various approximations, the improved approaches and obtained results have proven to be important contributions for a better understanding of light-induced processes in biosystems which also adds to efforts of their artificial reproduction.}, language = {en} } @phdthesis{Thomas2013, author = {Thomas, Bj{\"o}rn Daniel}, title = {Analysis and management of low flows in small catchments of Brandenburg, Germany}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-69247}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {Water management and environmental protection is vulnerable to extreme low flows during streamflow droughts. During the last decades, in most rivers of Central Europe summer runoff and low flows have decreased. Discharge projections agree that future decrease in runoff is likely for catchments in Brandenburg, Germany. Depending on the first-order controls on low flows, different adaption measures are expected to be appropriate. Small catchments were analyzed because they are expected to be more vulnerable to a changing climate than larger rivers. They are mainly headwater catchments with smaller ground water storage. Local characteristics are more important at this scale and can increase vulnerability. This thesis mutually evaluates potential adaption measures to sustain minimum runoff in small catchments of Brandenburg, Germany, and similarities of these catchments regarding low flows. The following guiding questions are addressed: (i) Which first-order controls on low flows and related time scales exist? (ii) Which are the differences between small catchments regarding low flow vulnerability? (iii) Which adaption measures to sustain minimum runoff in small catchments of Brandenburg are appropriate considering regional low flow patterns? Potential adaption measures to sustain minimum runoff during periods of low flows can be classified into three categories: (i) increase of groundwater recharge and subsequent baseflow by land use change, land management and artificial ground water recharge, (ii) increase of water storage with regulated outflow by reservoirs, lakes and wetland water management and (iii) regional low flow patterns have to be considered during planning of measures with multiple purposes (urban water management, waste water recycling and inter-basin water transfer). The question remained whether water management of areas with shallow groundwater tables can efficiently sustain minimum runoff. Exemplary, water management scenarios of a ditch irrigated area were evaluated using the model Hydrus-2D. Increasing antecedent water levels and stopping ditch irrigation during periods of low flows increased fluxes from the pasture to the stream, but storage was depleted faster during the summer months due to higher evapotranspiration. Fluxes from this approx. 1 km long pasture with an area of approx. 13 ha ranged from 0.3 to 0.7 l\s depending on scenario. This demonstrates that numerous of such small decentralized measures are necessary to sustain minimum runoff in meso-scale catchments. Differences in the low flow risk of catchments and meteorological low flow predictors were analyzed. A principal component analysis was applied on daily discharge of 37 catchments between 1991 and 2006. Flows decreased more in Southeast Brandenburg according to meteorological forcing. Low flow risk was highest in a region east of Berlin because of intersection of a more continental climate and the specific geohydrology. In these catchments, flows decreased faster during summer and the low flow period was prolonged. A non-linear support vector machine regression was applied to iteratively select meteorological predictors for annual 30-day minimum runoff in 16 catchments between 1965 and 2006. The potential evapotranspiration sum of the previous 48 months was the most important predictor (r²=0.28). The potential evapotranspiration of the previous 3 months and the precipitation of the previous 3 months and last year increased model performance (r²=0.49, including all four predictors). Model performance was higher for catchments with low yield and more damped runoff. In catchments with high low flow risk, explanatory power of long term potential evapotranspiration was high. Catchments with a high low flow risk as well as catchments with a considerable decrease in flows in southeast Brandenburg have the highest demand for adaption. Measures increasing groundwater recharge are to be preferred. Catchments with high low flow risk showed relatively deep and decreasing groundwater heads allowing increased groundwater recharge at recharge areas with higher altitude away from the streams. Low flows are expected to stay low or decrease even further because long term potential evapotranspiration was the most important low flow predictor and is projected to increase during climate change. Differences in low flow risk and runoff dynamics between catchments have to be considered for management and planning of measures which do not only have the task to sustain minimum runoff.}, language = {en} } @phdthesis{Bortfeld2013, author = {Bortfeld, Silvia}, title = {Analysis of Medicago truncatula transcription factors involved in the arbuscular mycorrhizal symbiosis}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-70664}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {For the first time the transcriptional reprogramming of distinct root cortex cells during the arbuscular mycorrhizal (AM) symbiosis was investigated by combining Laser Capture Mirodissection and Affymetrix GeneChip® Medicago genome array hybridization. The establishment of cryosections facilitated the isolation of high quality RNA in sufficient amounts from three different cortical cell types. The transcript profiles of arbuscule-containing cells (arb cells), non-arbuscule-containing cells (nac cells) of Rhizophagus irregularis inoculated Medicago truncatula roots and cortex cells of non-inoculated roots (cor) were successfully explored. The data gave new insights in the symbiosis-related cellular reorganization processes and indicated that already nac cells seem to be prepared for the upcoming fungal colonization. The mycorrhizal- and phosphate-dependent transcription of a GRAS TF family member (MtGras8) was detected in arb cells and mycorrhizal roots. MtGRAS shares a high sequence similarity to a GRAS TF suggested to be involved in the fungal colonization processes (MtRAM1). The function of MtGras8 was unraveled upon RNA interference- (RNAi-) mediated gene silencing. An AM symbiosis-dependent expression of a RNAi construct (MtPt4pro::gras8-RNAi) revealed a successful gene silencing of MtGras8 leading to a reduced arbuscule abundance and a higher proportion of deformed arbuscules in root with reduced transcript levels. Accordingly, MtGras8 might control the arbuscule development and life-time. The targeting of MtGras8 by the phosphate-dependent regulated miRNA5204* was discovered previously (Devers et al., 2011). Since miRNA5204* is known to be affected by phosphate, the posttranscriptional regulation might represent a link between phosphate signaling and arbuscule development. In this work, the posttranscriptional regulation was confirmed by mis-expression of miRNA5204* in M. truncatula roots. The miRNA-mediated gene silencing affects the MtGras8 transcript abundance only in the first two weeks of the AM symbiosis and the mis-expression lines seem to mimic the phenotype of MtGras8-RNAi lines. Additionally, MtGRAS8 seems to form heterodimers with NSP2 and RAM1, which are known to be key regulators of the fungal colonization process (Hirsch et al., 2009; Gobbato et al., 2012). These data indicate that MtGras8 and miRNA5204* are linked to the sym pathway and regulate the arbuscule development in phosphate-dependent manner.}, language = {en} } @article{RarogNagaeva2013, author = {Rarog, Alexey and Nagaeva, Tatiana}, title = {Angriff als Tathandlung im Besonderen Teil des russischen Strafrechts}, series = {Schriften zum deutschen und russischen Strafrecht}, journal = {Schriften zum deutschen und russischen Strafrecht}, number = {3}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {2191-0898}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-67745}, pages = {203 -- 214}, year = {2013}, language = {de} } @misc{Arnold2013, author = {Arnold, Rafael D.}, title = {Annette Benaim: Sixteenth-Century Judeo-Spanish Testimonies. An Edition of Eighty-four Testimonies from the Sephardic Responsa in the Ottoman Empire / [rezensiert von] Rafael Arnold}, series = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien e.V.}, journal = {PaRDeS : Zeitschrift der Vereinigung f{\"u}r J{\"u}dische Studien e.V.}, number = {19}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1614-6492}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-67221}, pages = {234 -- 238}, year = {2013}, abstract = {Rezensiertes Werk: Benaim: Annette: Sixteenth-Century Judeo-Spanish Testimonies. An Edition of Eighty-four Testimonies from the Sephardic Responsa in the Ottoman Empire. - Leiden: Brill 2012. XXVI. 576 S. - (= {\´E}tudes sur le Juda{\"i}sme M{\´e}di{\´e}val, Bd. 52)}, language = {de} } @phdthesis{Neymeyer2013, author = {Neymeyer, Hanna}, title = {Annexin A1 im chronischen Nierenversagen}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-69670}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {Die Expansion des renalen Tubulointerstitiums aufgrund einer Akkumulation zellul{\"a}rer Bestandteile und extrazellul{\"a}rer Matrix ist eine charakteristische Eigenschaft der chronischen Nierenerkrankung (CKD) und f{\"u}hrt zu einer Progression der Erkrankung in Richtung eines terminalen Nierenversagens. Die Fibroblasten Proliferation und ihre Transformation hin zum sekretorischen Myofibroblasten-Ph{\"a}notyp stellen hierbei Schl{\"u}sselereignisse dar. Signalprozesse, die zur Induktion der Myofibroblasten f{\"u}hren, werden aktiv beforscht um anti-fibrotische Therapieans{\"a}tze zu identifizieren. Das anti-inflammatorische Protein Annexin A1 und sein Rezeptor Formyl-Peptid Rezeptor 2 (FPR2) wurden in verschiedenen Organsystemen mit der Regulation von Fibroblastenaktivit{\"a}t in Verbindung gebracht, jedoch wurden ihre Expression und Funktion bei renalen fibrotischen Erkrankungen bisher nicht untersucht. Ziel der aktuellen Studie war daher die Untersuchung der renalen Annexin A1- und FPR2-Expression in einem Tiermodell des chronischen Nierenversagens, sowie die Charakterisierung der funktionellen Rolle von Annexin A1 in der Regulation des Fibroblasten Ph{\"a}notyps und ihrer Syntheseleistung. Dazu wurden neugeborene Sprague-Dawley Ratten in den ersten zwei Wochen ihres Lebens entweder mit Vehikel oder mit einem Angiotensin II Typ I Rezeptor Antagonisten behandelt und ohne weitere Intervention bis zu einem Alter von 11 Monaten (CKD Ratten) gehalten. Die Regulation und Lokalisation von Annexin A1 und FPR2 wurden mit Hilfe von Real-Time PCR und Immunhistochemie erfasst. Annexin A1- und FPR2-exprimierende Zellen wurden weiter durch Doppelimmunfluoreszenzf{\"a}rbungen charakterisiert. Gef{\"a}rbt wurde mit Antik{\"o}rpern gegen endotheliale Zellen (rat endothelial cell antigen), Makrophagen (CD 68), Fibroblasten (CD73) und Myofibroblasten (alpha-smooth muscle actin (α-sma)). Zellkulturstudien wurden an immortalisierten renalen kortikalen Fibroblasten aus Wildtyp- und Annexin A1-defizienten M{\"a}usen, sowie an etablierten humanen und murinen renalen Fibrolasten durchgef{\"u}hrt. Eine {\"U}berexpression von Annexin A1 wurde durch eine stabile Transfektion erreicht. Die Expression von Annexin A1, α-sma und Kollagen 1α1 wurde durch Real-Time PCR, Western Blot und Immuhistochemie erfasst. Die Sekretion des Annexin A1 Proteins wurde nach TCA-F{\"a}llung des Zellkultur{\"u}berstandes im Western Blot untersucht. Wie zu erwarten zeigten die CKD Ratten eine geringere Anzahl an Nephronen mit deutlicher glomerul{\"a}ren Hypertrophie. Der tubulointerstitielle Raum war durch fibrill{\"a}res Kollagen, aktivierte Fibroblasten und inflammatorische Zellen expandiert. Parallel dazu war die mRNA Expression von Annexin A1 und Transforming growth factor beta (TGF-β) signifikant erh{\"o}ht. Die Annexin A1-Lokalisation mittels Doppelimmunfluorsezenz identifizierte eine große Anzahl von CD73-positiven kortikalen Fibroblasten und eine Subpopulation von Makrophagen als Annexin A1-positiv. Die Annexin A1-Menge in Myofibroblasten und renalen Endothelien war gering. FPR2 konnte in der Mehrzahl der renalen Fibroblasten, in Myofibroblasten, in einer Subpopulation von Makrophagen und in renalen Epithelzellen nachgewiesen werden. Eine Behandlung der murinen Fibroblasten mit dem pro-fibrotischen Zytokin TGF-β f{\"u}hrte zu einem parallelen Anstieg der α-sma-, Kollagen 1α1- und Annexin A1-Biosynthese und zu einer gesteigerten Sekretion von Annexin A1. Eine {\"U}berexpression von Annexin A1 in murinen Fibroblasten reduzierte das Ausmaß der TGF-β induzierten α-sma- und Kollagen 1α1-Biosynthese. Fibroblasten aus Annexin A1-defizienten M{\"a}usen zeigten einen starken Myofibroblasten-Ph{\"a}notyp mit einer gesteigerten Expression an α-sma und Kollagen 1α1. Der Einsatz eines Peptidantagonisten des FPR2 (WRW4) resultierte in einer Stimulation der α-sma-Biosynthese, was die Vermutung nahe legte, dass Annexin A1 FPR2-vermittelt anti-fibrotische Effekte hat. Zusammenfassend zeigen diese Ergebnisse, dass renale kortikale Fibroblasten eine Hauptquelle des Annexin A1 im renalen Interstitium und einen Ansatzpunkt f{\"u}r Annexin A1-Signalwege in der Niere darstellen. Das Annexin A1/FPR2-System k{\"o}nnte daher eine wichtige Rolle in der Kontrolle des Fibroblasten Ph{\"a}notyp und der Fibroblasten Aktivit{\"a}t spielen und daher einen neuen Ansatz f{\"u}r die anti-fibrotischen pharmakologischen Strategien in der Behandlung des CKD darstellen.}, language = {de} } @misc{BanbaraSohTamuraetal.2013, author = {Banbara, Mutsunori and Soh, Takehide and Tamura, Naoyuki and Inoue, Katsumi and Schaub, Torsten H.}, title = {Answer set programming as a modeling language for course timetabling}, series = {Postprints der Universit{\"a}t Potsdam : Mathematisch Naturwissenschaftliche Reihe}, journal = {Postprints der Universit{\"a}t Potsdam : Mathematisch Naturwissenschaftliche Reihe}, number = {594}, issn = {1866-8372}, doi = {10.25932/publishup-41546}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-415469}, pages = {783 -- 798}, year = {2013}, abstract = {The course timetabling problem can be generally defined as the task of assigning a number of lectures to a limited set of timeslots and rooms, subject to a given set of hard and soft constraints. The modeling language for course timetabling is required to be expressive enough to specify a wide variety of soft constraints and objective functions. Furthermore, the resulting encoding is required to be extensible for capturing new constraints and for switching them between hard and soft, and to be flexible enough to deal with different formulations. In this paper, we propose to make effective use of ASP as a modeling language for course timetabling. We show that our ASP-based approach can naturally satisfy the above requirements, through an ASP encoding of the curriculum-based course timetabling problem proposed in the third track of the second international timetabling competition (ITC-2007). Our encoding is compact and human-readable, since each constraint is individually expressed by either one or two rules. Each hard constraint is expressed by using integrity constraints and aggregates of ASP. Each soft constraint S is expressed by rules in which the head is the form of penalty (S, V, C), and a violation V and its penalty cost C are detected and calculated respectively in the body. We carried out experiments on four different benchmark sets with five different formulations. We succeeded either in improving the bounds or producing the same bounds for many combinations of problem instances and formulations, compared with the previous best known bounds.}, language = {en} } @article{HolzBergerSchroeder2013, author = {Holz, Jan and Berger, Nadine and Schroeder, Ulrike}, title = {Anwendungsorientierte Gestaltung eines Informatik-Vorkurses als Studienmotivator}, series = {Commentarii informaticae didacticae : (CID)}, journal = {Commentarii informaticae didacticae : (CID)}, number = {5}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1868-0844}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-64871}, pages = {56 -- 66}, year = {2013}, abstract = {Zur Unterst{\"u}tzung von Studierenden in der Studieneingangsphase wurde an der RWTH Aachen ein neuartiger und motivierender Einstieg in den Vorkurs Informatik entwickelt und zum Wintersemester 2011/12 erprobt. Dabei wurde die grafische Programmierung mittels App Inventor eingef{\"u}hrt, die zur Umsetzung anwendungsbezogener Projekte genutzt wurde. In diesem Beitrag werden die Motivation f{\"u}r die Neugestaltung, das Konzept und die Evaluation des Testlaufs beschrieben. Diese dienen als Grundlage f{\"u}r eine vollst{\"a}ndige Neukonzeption des Vorkurses f{\"u}r das Wintersemester 2012/2013.}, language = {de} } @phdthesis{Vogel2013, author = {Vogel, Kristin}, title = {Applications of Bayesian networks in natural hazard assessments}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-69777}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {Even though quite different in occurrence and consequences, from a modeling perspective many natural hazards share similar properties and challenges. Their complex nature as well as lacking knowledge about their driving forces and potential effects make their analysis demanding: uncertainty about the modeling framework, inaccurate or incomplete event observations and the intrinsic randomness of the natural phenomenon add up to different interacting layers of uncertainty, which require a careful handling. Nevertheless deterministic approaches are still widely used in natural hazard assessments, holding the risk of underestimating the hazard with disastrous effects. The all-round probabilistic framework of Bayesian networks constitutes an attractive alternative. In contrast to deterministic proceedings, it treats response variables as well as explanatory variables as random variables making no difference between input and output variables. Using a graphical representation Bayesian networks encode the dependency relations between the variables in a directed acyclic graph: variables are represented as nodes and (in-)dependencies between variables as (missing) edges between the nodes. The joint distribution of all variables can thus be described by decomposing it, according to the depicted independences, into a product of local conditional probability distributions, which are defined by the parameters of the Bayesian network. In the framework of this thesis the Bayesian network approach is applied to different natural hazard domains (i.e. seismic hazard, flood damage and landslide assessments). Learning the network structure and parameters from data, Bayesian networks reveal relevant dependency relations between the included variables and help to gain knowledge about the underlying processes. The problem of Bayesian network learning is cast in a Bayesian framework, considering the network structure and parameters as random variables itself and searching for the most likely combination of both, which corresponds to the maximum a posteriori (MAP score) of their joint distribution given the observed data. Although well studied in theory the learning of Bayesian networks based on real-world data is usually not straight forward and requires an adoption of existing algorithms. Typically arising problems are the handling of continuous variables, incomplete observations and the interaction of both. Working with continuous distributions requires assumptions about the allowed families of distributions. To "let the data speak" and avoid wrong assumptions, continuous variables are instead discretized here, thus allowing for a completely data-driven and distribution-free learning. An extension of the MAP score, considering the discretization as random variable as well, is developed for an automatic multivariate discretization, that takes interactions between the variables into account. The discretization process is nested into the network learning and requires several iterations. Having to face incomplete observations on top, this may pose a computational burden. Iterative proceedings for missing value estimation become quickly infeasible. A more efficient albeit approximate method is used instead, estimating the missing values based only on the observations of variables directly interacting with the missing variable. Moreover natural hazard assessments often have a primary interest in a certain target variable. The discretization learned for this variable does not always have the required resolution for a good prediction performance. Finer resolutions for (conditional) continuous distributions are achieved with continuous approximations subsequent to the Bayesian network learning, using kernel density estimations or mixtures of truncated exponential functions. All our proceedings are completely data-driven. We thus avoid assumptions that require expert knowledge and instead provide domain independent solutions, that are applicable not only in other natural hazard assessments, but in a variety of domains struggling with uncertainties.}, language = {en} } @phdthesis{Becker2013, author = {Becker, Basil}, title = {Architectural modelling and verification of open service-oriented systems of systems}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-70158}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {Systems of Systems (SoS) have received a lot of attention recently. In this thesis we will focus on SoS that are built atop the techniques of Service-Oriented Architectures and thus combine the benefits and challenges of both paradigms. For this thesis we will understand SoS as ensembles of single autonomous systems that are integrated to a larger system, the SoS. The interesting fact about these systems is that the previously isolated systems are still maintained, improved and developed on their own. Structural dynamics is an issue in SoS, as at every point in time systems can join and leave the ensemble. This and the fact that the cooperation among the constituent systems is not necessarily observable means that we will consider these systems as open systems. Of course, the system has a clear boundary at each point in time, but this can only be identified by halting the complete SoS. However, halting a system of that size is practically impossible. Often SoS are combinations of software systems and physical systems. Hence a failure in the software system can have a serious physical impact what makes an SoS of this kind easily a safety-critical system. The contribution of this thesis is a modelling approach that extends OMG's SoaML and basically relies on collaborations and roles as an abstraction layer above the components. This will allow us to describe SoS at an architectural level. We will also give a formal semantics for our modelling approach which employs hybrid graph-transformation systems. The modelling approach is accompanied by a modular verification scheme that will be able to cope with the complexity constraints implied by the SoS' structural dynamics and size. Building such autonomous systems as SoS without evolution at the architectural level --- i. e. adding and removing of components and services --- is inadequate. Therefore our approach directly supports the modelling and verification of evolution.}, language = {en} } @misc{Weiss2013, author = {Weiß, Norman}, title = {Arnd Pollmann/Georg Lohmann (Hrsg.), Menschenrechte. Ein interdisziplin{\"a}res Handbuch / [rezensiert von] Norman Weiß}, series = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen}, volume = {18}, journal = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen}, number = {2}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1434-2820}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-70266}, pages = {122 -- 123}, year = {2013}, abstract = {Rezensiertes Werk Arnd Pollmann/Georg Lohmann (Hrsg.), Menschenrechte. Ein interdisziplin{\"a}res Handbuch, Verlag J. B. Metzler, 2012, 466 Seiten, ISBN 978-3-476-02271-4}, language = {de} } @misc{Schwarz2013, author = {Schwarz, Wolfgang}, title = {Atommacht Pakistan - "The Ally From Hell"}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-64245}, year = {2013}, abstract = {Die genaue Anzahl einsatzf{\"a}higer Nuklearsprengk{\"o}pfe Pakistans, einer nach den Standards des internationalen Regimes zur Nichtweiterverbreitung von Kernwaffen (NPT) illegalen Atommacht, ist nicht bekannt. Hans Kristensen, Direktor des Nuclear Information Project der unabh{\"a}ngigen Federation of American Scientists und Kenner der Materie, rechnet mit 90 bis 110, Tendenz: kontinuierlich steigend. Diese Waffen befinden sich in einem Land, das seit Jahrzehnten vom Milit{\"a}r beherrscht wird, das aufgrund der extremen Armut einer Mehrheit der Bev{\"o}lkerung erheblichen sozialen Sprengstoff in sich birgt und in dem sich Guerilla-Angriffe separatistischer paschtunischer Taliban auch gegen Milit{\"a}rbasen richten, die mit den Kernstreitkr{\"a}ften des Landes in Verbindung gebracht werden. Experten warnen daher vor der M{\"o}glichkeit eines fundamental-islamistischen Umsturzes ebenso wie vor der Gefahr, dass einzelne Atomwaffen in die H{\"a}nde terroristischer Gruppen geraten k{\"o}nnten. Was den letzteren Aspekt anbetrifft, so beruhigt es auch nicht, wenn die pakistanischen Taliban - wie im Mai 2011 - erkl{\"a}ren, dass „Pakistan die einzige muslimische Atommacht" sei und man an diesem Status nichts {\"a}ndern wolle.}, language = {de} } @article{Thaidigsmann2013, author = {Thaidigsmann, Karoline}, title = {Augenprosa}, series = {Verbrechen - Fiktion - Vermarktung : Gewalt in den zeitgen{\"o}ssischen slavischen Literaturen}, journal = {Verbrechen - Fiktion - Vermarktung : Gewalt in den zeitgen{\"o}ssischen slavischen Literaturen}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-69447}, pages = {315 -- 330}, year = {2013}, language = {de} } @article{BuschmannJank2013, author = {Buschmann, Jana and Jank, Birgit}, title = {Ausgew{\"a}hlte bilanzierende Einblicke zum Projekt „Belcantare Brandenburg"}, series = {Potsdamer Schriftenreihe zur Musikp{\"a}dagogik}, journal = {Potsdamer Schriftenreihe zur Musikp{\"a}dagogik}, number = {3}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-65703}, pages = {95 -- 110}, year = {2013}, language = {de} } @phdthesis{Tyrallova2013, author = {Tyrallov{\´a}, Lucia}, title = {Automatisierte Objektidentifikation und Visualisierung terrestrischer Oberfl{\"a}chenformen}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-69268}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {Die automatisierte Objektidentifikation stellt ein modernes Werkzeug in den Geoinformationswissenschaften dar (BLASCHKE et al., 2012). Um bei thematischen Kartierungen untereinander vergleichbare Ergebnisse zu erzielen, sollen aus Sicht der Geoinformatik Mittel f{\"u}r die Objektidentifikation eingesetzt werden. Anstelle von Feldarbeit werden deshalb in der vorliegenden Arbeit multispektrale Fernerkundungsdaten als Prim{\"a}rdaten verwendet. Konkrete nat{\"u}rliche Objekte werden GIS-gest{\"u}tzt und automatisiert {\"u}ber große Fl{\"a}chen und Objektdichten aus Prim{\"a}rdaten identifiziert und charakterisiert. Im Rahmen der vorliegenden Arbeit wird eine automatisierte Prozesskette zur Objektidentifikation konzipiert. Es werden neue Ans{\"a}tze und Konzepte der objektbasierten Identifikation von nat{\"u}rlichen isolierten terrestrischen Oberfl{\"a}chenformen entwickelt und implementiert. Die Prozesskette basiert auf einem Konzept, das auf einem generischen Ansatz f{\"u}r automatisierte Objektidentifikation aufgebaut ist. Die Prozesskette kann anhand charakteristischer quantitativer Parameter angepasst und so umgesetzt werden, womit das Konzept der Objektidentifikation modular und skalierbar wird. Die modulbasierte Architektur erm{\"o}glicht den Einsatz sowohl einzelner Module als auch ihrer Kombination und m{\"o}glicher Erweiterungen. Die eingesetzte Methodik der Objektidentifikation und die daran anschließende Charakteristik der (geo)morphometrischen und morphologischen Parameter wird durch statistische Verfahren gest{\"u}tzt. Diese erm{\"o}glichen die Vergleichbarkeit von Objektparametern aus unterschiedlichen Stichproben. Mit Hilfe der Regressionsund Varianzanalyse werden Verh{\"a}ltnisse zwischen Objektparametern untersucht. Es werden funktionale Abh{\"a}ngigkeiten der Parameter analysiert, um die Objekte qualitativ zu beschreiben. Damit ist es m{\"o}glich, automatisiert berechnete Maße und Indizes der Objekte als quantitative Daten und Informationen zu erfassen und unterschiedliche Stichproben anzuwenden. Im Rahmen dieser Arbeit bilden Thermokarstseen die Grundlage f{\"u}r die Entwicklungen und als Beispiel sowie Datengrundlage f{\"u}r den Aufbau des Algorithmus und die Analyse. Die Geovisualisierung der multivariaten nat{\"u}rlichen Objekte wird f{\"u}r die Entwicklung eines besseren Verst{\"a}ndnisses der r{\"a}umlichen Relationen der Objekte eingesetzt. Kern der Geovisualisierung ist das Verkn{\"u}pfen von Visualisierungsmethoden mit karten{\"a}hnlichen Darstellungen.}, language = {de} } @article{Kraemer2013, author = {Kr{\"a}mer, Raimund}, title = {Autoritarismus im 21. Jahrhundert}, series = {WeltTrends-Papiere}, journal = {WeltTrends-Papiere}, number = {23}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1864-0656}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-65312}, pages = {7 -- 17}, year = {2013}, abstract = {Inhalt: Mit Linz und Loewenstein - Zum Begriff des autorit{\"a}ren Regimes Von Wellen und blinden Flecken in der Komparatistik Autorit{\"a}re Regime im 21. Jahrhundert - Ein {\"U}berblick Schleichender Autoritarismus im Westen Autorit{\"a}re Wende des Kapitalismus?}, language = {de} } @unpublished{HoegeleRuffino2013, author = {H{\"o}gele, Michael and Ruffino, Paulo}, title = {Averaging along L{\´e}vy diffusions in foliated spaces}, issn = {2193-6943}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-64926}, year = {2013}, abstract = {We consider an SDE driven by a L{\´e}vy noise on a foliated manifold, whose trajectories stay on compact leaves. We determine the effective behavior of the system subject to a small smooth transversal perturbation of positive order epsilon. More precisely, we show that the average of the transversal component of the SDE converges to the solution of a deterministic ODE, according to the average of the perturbing vector field with respect to the invariant measures on the leaves (of the unpertubed system) as epsilon goes to 0. In particular we give upper bounds for the rates of convergence. The main results which are proved for pure jump L{\´e}vy processes complement the result by Gargate and Ruffino for Stratonovich SDEs to L{\´e}vy driven SDEs of Marcus type.}, language = {en} } @article{Schroeter2013, author = {Schr{\"o}ter, Carolin}, title = {AVWS »meets« LRS}, series = {Spektrum Patholinguistik}, journal = {Spektrum Patholinguistik}, number = {6}, editor = {Fritzsche, Tom and Meyer, Corinna B. and Adelt, Anne and Roß, Jennifer}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1866-9085}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-68527}, pages = {159 -- 171}, year = {2013}, abstract = {1 Einleitung 2 Zusammenh{\"a}nge zwischen zentral-auditiven Wahrnehmungs- und Verarbeitungsst{\"o}rungen (AVWS) und Beeintr{\"a}chtigungen im Lesen und Schreiben 3 Therapeutische M{\"o}glichkeiten zur Behandlung von komorbiden St{\"o}rungen im Lesen und Schreiben bei Kindern mit AVWS 4 Fallbeschreibung 5 Schlussfolgerung 6 Literatur}, language = {de} } @book{FelgentreffBorningHirschfeld2013, author = {Felgentreff, Tim and Borning, Alan and Hirschfeld, Robert}, title = {Babelsberg : specifying and solving constraints on object behavior}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, isbn = {978-3-86956-265-0}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-67296}, publisher = {Universit{\"a}t Potsdam}, pages = {53}, year = {2013}, abstract = {Constraints allow developers to specify desired properties of systems in a number of domains, and have those properties be maintained automatically. This results in compact, declarative code, avoiding scattered code to check and imperatively re-satisfy invariants. Despite these advantages, constraint programming is not yet widespread, with standard imperative programming still the norm. There is a long history of research on integrating constraint programming with the imperative paradigm. However, this integration typically does not unify the constructs for encapsulation and abstraction from both paradigms. This impedes re-use of modules, as client code written in one paradigm can only use modules written to support that paradigm. Modules require redundant definitions if they are to be used in both paradigms. We present a language - Babelsberg - that unifies the constructs for en- capsulation and abstraction by using only object-oriented method definitions for both declarative and imperative code. Our prototype - Babelsberg/R - is an extension to Ruby, and continues to support Ruby's object-oriented se- mantics. It allows programmers to add constraints to existing Ruby programs in incremental steps by placing them on the results of normal object-oriented message sends. It is implemented by modifying a state-of-the-art Ruby virtual machine. The performance of standard object-oriented code without con- straints is only modestly impacted, with typically less than 10\% overhead compared with the unmodified virtual machine. Furthermore, our architec- ture for adding multiple constraint solvers allows Babelsberg to deal with constraints in a variety of domains. We argue that our approach provides a useful step toward making con- straint solving a generic tool for object-oriented programmers. We also provide example applications, written in our Ruby-based implementation, which use constraints in a variety of application domains, including interactive graphics, circuit simulations, data streaming with both hard and soft constraints on performance, and configuration file Management.}, language = {en} } @phdthesis{Bajerski2013, author = {Bajerski, Felizitas}, title = {Bacterial communities in glacier forefields of the Larsemann Hills, East Antarctica : structure, development \& adaptation}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-67424}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {Antarctic glacier forfields are extreme environments and pioneer sites for ecological succession. The Antarctic continent shows microbial community development as a natural laboratory because of its special environment, geographic isolation and little anthropogenic influence. Increasing temperatures due to global warming lead to enhanced deglaciation processes in cold-affected habitats and new terrain is becoming exposed to soil formation and accessible for microbial colonisation. This study aims to understand the structure and development of glacier forefield bacterial communities, especially how soil parameters impact the microorganisms and how those are adapted to the extreme conditions of the habitat. To this effect, a combination of cultivation experiments, molecular, geophysical and geochemical analysis was applied to examine two glacier forfields of the Larsemann Hills, East Antarctica. Culture-independent molecular tools such as terminal restriction length polymorphism (T-RFLP), clone libraries and quantitative real-time PCR (qPCR) were used to determine bacterial diversity and distribution. Cultivation of yet unknown species was carried out to get insights in the physiology and adaptation of the microorganisms. Adaptation strategies of the microorganisms were studied by determining changes of the cell membrane phospholipid fatty acid (PLFA) inventory of an isolated bacterium in response to temperature and pH fluctuations and by measuring enzyme activity at low temperature in environmental soil samples. The two studied glacier forefields are extreme habitats characterised by low temperatures, low water availability and small oligotrophic nutrient pools and represent sites of different bacterial succession in relation to soil parameters. The investigated sites showed microbial succession at an early step of soil formation near the ice tongue in comparison to closely located but rather older and more developed soil from the forefield. At the early step the succession is influenced by a deglaciation-dependent areal shift of soil parameters followed by a variable and prevalently depth-related distribution of the soil parameters that is driven by the extreme Antarctic conditions. The dominant taxa in the glacier forefields are Actinobacteria, Acidobacteria, Proteobacteria, Bacteroidetes, Cyanobacteria and Chloroflexi. The connection of soil characteristics with bacterial community structure showed that soil parameter and soil formation along the glacier forefield influence the distribution of certain phyla. In the early step of succession the relative undifferentiated bacterial diversity reflects the undifferentiated soil development and has a high potential to shift according to past and present environmental conditions. With progressing development environmental constraints such as water or carbon limitation have a greater influence. Adapting the culturing conditions to the cold and oligotrophic environment, the number of culturable heterotrophic bacteria reached up to 108 colony forming units per gram soil and 148 isolates were obtained. Two new psychrotolerant bacteria, Herbaspirillum psychrotolerans PB1T and Chryseobacterium frigidisoli PB4T, were characterised in detail and described as novel species in the family of Oxalobacteraceae and Flavobacteriaceae, respectively. The isolates are able to grow at low temperatures tolerating temperature fluctuations and they are not specialised to a certain substrate, therefore they are well-adapted to the cold and oligotrophic environment. The adaptation strategies of the microorganisms were analysed in environmental samples and cultures focussing on extracellular enzyme activity at low temperature and PLFA analyses. Extracellular phosphatases (pH 11 and pH 6.5), β-glucosidase, invertase and urease activity were detected in the glacier forefield soils at low temperature (14°C) catalysing the conversion of various compounds providing necessary substrates and may further play a role in the soil formation and total carbon turnover of the habitat. The PLFA analysis of the newly isolated species C. frigidisoli showed that the cold-adapted strain develops different strategies to maintain the cell membrane function under changing environmental conditions by altering the PLFA inventory at different temperatures and pH values. A newly discovered fatty acid, which was not found in any other microorganism so far, significantly increased at decreasing temperature and low pH and thus plays an important role in the adaption of C. frigidisoli. This work gives insights into the diversity, distribution and adaptation mechanisms of microbial communities in oligotrophic cold-affected soils and shows that Antarctic glacier forefields are suitable model systems to study bacterial colonisation in connection to soil formation.}, language = {en} } @phdthesis{Theves2013, author = {Theves, Matthias}, title = {Bacterial motility and growth in open and confined environments}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-70313}, school = {Universit{\"a}t Potsdam}, year = {2013}, abstract = {In the presence of a solid-liquid or liquid-air interface, bacteria can choose between a planktonic and a sessile lifestyle. Depending on environmental conditions, cells swimming in close proximity to the interface can irreversibly attach to the surface and grow into three-dimensional aggregates where the majority of cells is sessile and embedded in an extracellular polymer matrix (biofilm). We used microfluidic tools and time lapse microscopy to perform experiments with the polarly flagellated soil bacterium Pseudomonas putida (P. putida), a bacterial species that is able to form biofilms. We analyzed individual trajectories of swimming cells, both in the bulk fluid and in close proximity to a glass-liquid interface. Additionally, surface related growth during the early phase of biofilm formation was investigated. In the bulk fluid, P.putida shows a typical bacterial swimming pattern of alternating periods of persistent displacement along a line (runs) and fast reorientation events (turns) and cells swim with an average speed around 24 micrometer per second. We found that the distribution of turning angles is bimodal with a dominating peak around 180 degrees. In approximately six out of ten turning events, the cell reverses its swimming direction. In addition, our analysis revealed that upon a reversal, the cell systematically changes its swimming speed by a factor of two on average. Based on the experimentally observed values of mean runtime and rotational diffusion, we presented a model to describe the spreading of a population of cells by a run-reverse random walker with alternating speeds. We successfully recover the mean square displacement and, by an extended version of the model, also the negative dip in the directional autocorrelation function as observed in the experiments. The analytical solution of the model demonstrates that alternating speeds enhance a cells ability to explore its environment as compared to a bacterium moving at a constant intermediate speed. As compared to the bulk fluid, for cells swimming near a solid boundary we observed an increase in swimming speed at distances below d= 5 micrometer and an increase in average angular velocity at distances below d= 4 micrometer. While the average speed was maximal with an increase around 15\% at a distance of d= 3 micrometer, the angular velocity was highest in closest proximity to the boundary at d=1 micrometer with an increase around 90\% as compared to the bulk fluid. To investigate the swimming behavior in a confinement between two solid boundaries, we developed an experimental setup to acquire three-dimensional trajectories using a piezo driven objective mount coupled to a high speed camera. Results on speed and angular velocity were consistent with motility statistics in the presence of a single boundary. Additionally, an analysis of the probability density revealed that a majority of cells accumulated near the upper and lower boundaries of the microchannel. The increase in angular velocity is consistent with previous studies, where bacteria near a solid boundary were shown to swim on circular trajectories, an effect which can be attributed to a wall induced torque. The increase in speed at a distance of several times the size of the cell body, however, cannot be explained by existing theories which either consider the drag increase on cell body and flagellum near a boundary (resistive force theory) or model the swimming microorganism by a multipole expansion to account for the flow field interaction between cell and boundary. An accumulation of swimming bacteria near solid boundaries has been observed in similar experiments. Our results confirm that collisions with the surface play an important role and hydrodynamic interactions alone cannot explain the steady-state accumulation of cells near the channel walls. Furthermore, we monitored the number growth of cells in the microchannel under medium rich conditions. We observed that, after a lag time, initially isolated cells at the surface started to grow by division into colonies of increasing size, while coexisting with a comparable smaller number of swimming cells. After 5:50 hours, we observed a sudden jump in the number of swimming cells, which was accompanied by a breakup of bigger clusters on the surface. After approximately 30 minutes where planktonic cells dominated in the microchannel, individual swimming cells reattached to the surface. We interpret this process as an emigration and recolonization event. A number of complementary experiments were performed to investigate the influence of collective effects or a depletion of the growth medium on the transition. Similar to earlier observations on another bacterium from the same family we found that the release of cells to the swimming phase is most likely the result of an individual adaption process, where syntheses of proteins for flagellar motility are upregulated after a number of division cycles at the surface.}, language = {en} } @article{Mikolayczyk2013, author = {Mikolayczyk, Rolf-Peter}, title = {Banking Regulation in the US and Basel III}, series = {Protokollband 2013}, journal = {Protokollband 2013}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-68744}, pages = {135 -- 153}, year = {2013}, abstract = {1. Introduction 2. Banking crises/regulation - some history 3. New rules and regulations for US banking 4. Basel III/history of Basel accords 5. Final thought}, language = {en} } @article{Nikitina2013, author = {Nikitina, Tatjana}, title = {Banking System in Russia}, series = {Protokollband 2013}, journal = {Protokollband 2013}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-68715}, pages = {103}, year = {2013}, language = {en} }