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- Hasso-Plattner-Institut für Digital Engineering gGmbH (21)
- Department Sport- und Gesundheitswissenschaften (20)
- Bürgerliches Recht (18)
- Philosophische Fakultät (17)
- Institut für Umweltwissenschaften und Geographie (14)
- Mathematisch-Naturwissenschaftliche Fakultät (13)
- Lehreinheit für Wirtschafts-Arbeit-Technik (7)
- Interdisziplinäres Zentrum für Dynamik komplexer Systeme (6)
- Strafrecht (6)
- Institut für Slavistik (5)
- Strukturbereich Kognitionswissenschaften (5)
- Department Grundschulpädagogik (4)
- Fachgruppe Soziologie (4)
- Institut für Religionswissenschaft (4)
- Referat für Presse- und Öffentlichkeitsarbeit (4)
- Zentrum für Lehrerbildung und Bildungsforschung (ZeLB) (4)
- Institut für Philosophie (3)
- Sonderforschungsbereich 632 - Informationsstruktur (3)
- Humanwissenschaftliche Fakultät (2)
- Abraham Geiger Kolleg gGmbH (1)
- Dezernat 2: Studienangelegenheiten (1)
- Moses Mendelssohn Zentrum für europäisch-jüdische Studien e. V. (1)
- Netzwerk Studienqualität Brandenburg (sqb) (1)
- Verband für Patholinguistik e. V. (vpl) (1)
- Wirtschafts- und Sozialwissenschaftliche Fakultät (1)
Proceedings of KogWis 2010 : 10th Biannual Meeting of the German Society for Cognitive Science
(2010)
As the latest biannual meeting of the German Society for Cognitive Science (Gesellschaft für Kognitionswissenschaft, GK), KogWis 2010 at Potsdam University reflects the current trends in a fascinating domain of research concerned with human and artificial cognition and the interaction of mind and brain. The Plenary talks provide a venue for questions of the numerical capacities and human arithmetic (Brian Butterworth), of the theoretical development of cognitive architectures and intelligent virtual agents (Pat Langley), of categorizations induced by linguistic constructions (Claudia Maienborn), and of a cross-level account of the “Self as a complex system“ (Paul Thagard). KogWis 2010 integrates a wealth of experimental research, cognitive modelling, and conceptual analysis in 5 invited symposia, over 150 individual talks, 6 symposia, and more than 40 poster contributions. Some of the invited symposia reflect local and regional strenghts of research in the Berlin-Brandenburg area: the two largests research fields of the university Cognitive Sciences Area of Excellence in Potsdam are represented by an invited symposium on “Information Structure” by the Special Research Area 632 (“Sonderforschungsbereich”, SFB) of the same name, of Potsdam University and Humboldt-University Berlin, and by a satellite conference of the research group “Mind and Brain Dynamics”. The Berlin School of Mind and Brain at Humboldt-University Berlin takes part with an invited symposium on “Decision Making” from a perspective of cognitive neuroscience and philosophy and the DFG Cluster of Excellence “Languages of Emotion” of Free University presents interdisciplinary research results in an invited symposium on “Symbolising Emotions”.
Different properties of programs, implemented in Constraint Handling Rules (CHR), have already been investigated. Proving these properties in CHR is fairly simpler than proving them in any type of imperative programming language, which triggered the proposal of a methodology to map imperative programs into equivalent CHR. The equivalence of both programs implies that if a property is satisfied for one, then it is satisfied for the other. The mapping methodology could be put to other beneficial uses. One such use is the automatic generation of global constraints, at an attempt to demonstrate the benefits of having a rule-based implementation for constraint solvers.
We establish elements of a new approach to ellipticity and parametrices within operator algebras on manifolds with higher singularities, only based on some general axiomatic requirements on parameter-dependent operators in suitable scales of spaes. The idea is to model an iterative process with new generations of parameter-dependent operator theories, together with new scales of spaces that satisfy analogous requirements as the original ones, now on a corresponding higher level. The "full" calculus involves two separate theories, one near the tip of the corner and another one at the conical exit to infinity. However, concerning the conical exit to infinity, we establish here a new concrete calculus of edge-degenerate operators which can be iterated to higher singularities.
The power of apology
(2010)
Stress inoculation facilitates active avoidance learning of the semi-precocial rodent Octodon degus
(2010)
A growing body of evidence highlights the impact of the early social environment for the adequate development of brain and behavior in animals and humans. Disturbances of this environment were found to be both maladaptive and adaptive to emotional and cognitive function. Using the semi-precocial, biparental rodent Octodon degus, we aimed to examine (i) the impact of age (juvenile/adult), sex (male/female), and (ii) "motivation" to solve the task (by applying increasing foot-shock-intensities) on two-way active avoidance (TWA) learning in socially reared degus, and (iii) whether early life stress inoculation by 1 h daily parental separation during the first three weeks of life has maladaptive or adaptive consequences on cognitive function as measured by TWA learning. Our results showed that (i) juvenile degus, unlike altricial rats of the same age, can successfully learn the TWA task comparable to adults, and (ii) that learning performance improves with increasing "task motivation", irrespective of age and sex. Furthermore, we revealed that (iii) stress inoculation improves avoidance learning, particularly in juvenile males, quantitatively and qualitatively depending on "task motivation". In conclusion, the present study describes for the first time associative learning in O. degus and its modulation by early life stress experience as an animal model to study the underlying mechanisms of learning and memory in the stressed and unstressed brain. Although, stress is commonly viewed as being maladaptive, our data indicate that early life stress inoculation triggers developmental cascades of adaptive functioning, which may improve cognitive and emotional processing of stressors later in life.
The Relativized Minimality approach to A'-dependencies (Friedmann et al., 2009) predicts that headed object relative clauses (RCs) and which questions are the most difficult, due to the presence of a lexical restriction on both the subject and the object DP which creates intervention. We investigated comprehension of center-embedded headed object RCs with Italian children, where Number and Gender feature values on subject and object DPs are manipulated. We found that. Number conditions are always more accurate than Gender ones, showing that intervention is sensitive to DP-internal structure. We propose a finer definition of the lexical restriction where external and syntactically active features (such as Number) reduce intervention whereas internal and (possibly) lexicalized features (such as Gender) do so to a lesser extent. Our results are also compatible with a memory interference approach in which the human parser is sensitive to highly specific properties of the linguistic input, such as the cue-based model (Van Dyke, 2007).
We have studied I lie thermal behavior of amphiphilic, symmetric triblock copolymers having short, deuterated polystyrene (PS) end blocks and a large poly(N-isopropylacrylarnicle) (PNIPAM) middle block exhibiting a lower critical solution temperature (LCST) in aqueous solution. A wide range of concentrations (0.1-300 mg/mL) is investigated using it number of analytical methods such as fluorescence correlation spectroscopy (FCS), turbidimetry, dynamic light scattering (DLS), small-angle neutron scattering (SANS), and neutron spin-echo spectroscopy (NSE). The critical micelle concentration is determined using FCS to be 1 mu M or less. The collapse of the micelles at the LCST is investigated using turbidimetry and DLS and shows a weak dependence on the degree of polymerization of the PNIPAM block. SANS with contrast matching allows its to reveal the core-shell Structure of the micelles as well as their correlation as a function of temperature. The segmental dynamics of the PNIPAM shell are studied as a function of temperature and arc found to be faster in the collapsed state than in the swollen state. The mode detected has a linear dispersion in q(2) and is found to be faster in the collapsed state as compared to the swollen state. We attribute this result to the averaging over mobile and immobilized segments.
The subsurface harbors a large fraction of Earth's living biomass, forming complex microbial ecosystems. Without a profound knowledge of the ongoing biologically mediated processes and their reaction to anthropogenic changes it is difficult to assess the long-term stability and feasibility of any type of geotechnical utilization, as these influence subsurface ecosystems. Despite recent advances in many areas of subsurface microbiology, the direct quantification of turnover processes is still in its infancy, mainly due to the extremely low cell abundances. We provide an overview of the currently available techniques for the quantification of microbial turnover processes and discuss their specific strengths and limitations. Most techniques employed so far have focused on specific processes, e.g. sulfate reduction or methanogenesis. Recent studies show that processes that were previously thought to exclude each other can occur simultaneously, albeit at very low rates. Without the identification of the respective processes it is impossible to quantify total microbial activity. Even in cases where all simultaneously occurring processes can be identified, the typically very low rates prevent quantification. In many cases a simple measure of total microbial activity would be a better and more robust measure than assays for several specific processes. Enzyme or molecular assays provide a more general approach as they target key metabolic compounds. Depending on the compound targeted a broader spectrum of microbial processes can be quantified. The two most promising compounds are ATP and hydrogenase, as both are ubiquitous in microbes. Technical constraints limit the applicability of currently available ATP-assays for subsurface samples. A recently developed hydrogenase radiotracer assay has the potential to become a key tool for the quantification of subsurface microbial activity.
In the present work, we study wave phenomena in strongly nonlinear lattices. Such lattices are characterized by the absence of classical linear waves. We demonstrate that compactons – strongly localized solitary waves with tails decaying faster than exponential – exist and that they play a major role in the dynamics of the system under consideration. We investigate compactons in different physical setups. One part deals with lattices of dispersively coupled limit cycle oscillators which find various applications in natural sciences such as Josephson junction arrays or coupled Ginzburg-Landau equations. Another part deals with Hamiltonian lattices. Here, a prominent example in which compactons can be found is the granular chain. In the third part, we study systems which are related to the discrete nonlinear Schrödinger equation describing, for example, coupled optical wave-guides or the dynamics of Bose-Einstein condensates in optical lattices. Our investigations are based on a numerical method to solve the traveling wave equation. This results in a quasi-exact solution (up to numerical errors) which is the compacton. Another ansatz which is employed throughout this work is the quasi-continuous approximation where the lattice is described by a continuous medium. Here, compactons are found analytically, but they are defined on a truly compact support. Remarkably, both ways give similar qualitative and quantitative results. Additionally, we study the dynamical properties of compactons by means of numerical simulation of the lattice equations. Especially, we concentrate on their emergence from physically realizable initial conditions as well as on their stability due to collisions. We show that the collisions are not exactly elastic but that a small part of the energy remains at the location of the collision. In finite lattices, this remaining part will then trigger a multiple scattering process resulting in a chaotic state.
Das 3. Herbsttreffen Patholinguistik fand am 21. November 2009 an der Universität Potsdam statt. Der vorliegende Tagungsband enthält die drei Hauptvorträge zum Schwerpunktthema „Von der Programmierung zu Artikulation: Sprechapraxie bei Kindern und Erwachsenen“. Darüber hinaus enthält der Band die Beiträge aus dem Spektrum Patholinguistik, sowie die Abstracts der Posterpräsentationen.
Seit dem Zusammenbruch der Sowjetunion kamen in diesem Raum neue Migrationsprozesse wie die Arbeitsmigration zwischen den südlichen GUS-Republiken und Russland, aber auch grenzüberschreitende Bevölkerungsbewegungen ethnischer Gruppen in ihre „historischen Herkunftsgebiete“ auf. Die in der vorliegenden Arbeit untersuchten, dynamischen Wanderungsprozesse von Kasachen zwischen der Mongolei und Kasachstan weisen Kennzeichen dieses Migrationstypus, aber auch einige Besonderheiten auf. Die vorliegende Arbeit hat längere Forschungsaufenthalte in Kasachstan und der Mongolei von 2006 bis 2009 zur Grundlage. Aus der Mongolei stammende kasachische Migranten im Umland von Almaty und Kasachen im westlichsten aymag der Mongolei, Bayan-Ölgiy, wurden mittels quantitativer und qualitativer Methoden empirischer Sozialforschung befragt. Ergänzend wurden in beiden Staaten Befragungen von Experten aus gesellschaftlichen, wissenschaftlichen und politischen Institutionen durchgeführt, um eine möglichst ausgeglichene Sicht auf die postsowjetischen Migrations- und Inkorporationsprozesse zwischen beiden Staaten sicherzustellen. Zwischen den Migranten in Kasachstan und ihren – noch bzw. wieder – in der Mongolei lebenden Verwandten haben sich in den letzten Jahrzehnten enge soziale Netzwerke entwickelt. Die Aufrechterhaltung der Bindungen wird durch eine Verbesserung der Transport- und Kommunikationsmöglichkeiten zwischen beiden Staaten gefördert. Zirkuläre Migrationsmuster, regelmäßige Besuche und Telefongespräche sowie grenzüberschreitende sozioökonomische Unterstützungsmechanismen haben sich insbesondere in den vergangenen Jahren intensiviert. Diese Interaktionen sind im Kontext der rechtlichen, politischen und wirtschaftlichen Bedingungen im Migrationssystem Mongolei-Kasachstan – und insbesondere in Wechselwirkung mit der staat¬lichen Migrations- und Inkorpora-tionspolitik – einzuordnen. Die Erkenntnisse der vorliegenden Untersuchung lassen sich in aller Kürze so zusammenfassen: (I) Die in sozialen Netzwerken organisierten Interaktionen der Kasachen aus der Mongolei weisen Merkmale von, aber auch Unterschiede zu Konzepten des Transnationalismus-Ansatzes auf. (II) Die sozialen Bindungen zwischen Verwandten generieren Sozialkapital und tragen zur alltäglichen Unterstützung bei. (III) Die lokalen und grenzüberschreitenden Aktivitäten der Migranten sind als Strategien der sozioökonomischen Eingliederung zu deuten. (IV) Ein wesentlicher Teil der aus der Mongolei stammenden Kasachen artikuliert von der Mehrheitsbevölkerung abweichende, hybride Identifikationsmuster, die die politischen Eliten in Kasachstan bisher zu wenig wahrnehmen.
Aus dem Inhalt: - Themenschwerpunkt: Sechzig Jahre EMRK - Rechtsstaat und Sicherheit: Die Sicherungsverwahrung auf dem Prüfstand - EGMR: Gäfgen ./. Deutschland - Das Individualbeschwerdeverfahren gemäß Art. 22 des Übereinkommens gegen Folter und andere grausame, unmenschliche oder erniedrigende Behandlung oder Strafe - Das Verschwindenlassen: zum Verständnis der UN-Konvention
We derive local integral and sup-estimates for the curvature of stable marginally outer trapped surfaces in a sliced space-time. The estimates bound the shear of a marginally outer trapped surface in terms of the intrinsic and extrinsic curvature of a slice containing the surface. These estimates are well adapted to situations of physical interest, such as dynamical horizons.
In this paper we develop a spatial Cournot trade model with two unequally sized countries, using the geographical interpretation of the Hotelling line. We analyze the trade and welfare effects of international trade between these two countries. The welfare analysis indicates that in this framework the large country benefits from free trade and the small country may be hurt by opening to trade. This finding is contrary to the results of Shachmurove and Spiegel (1995) as well as Tharakan and Thisse (2002), who use related models to analyze size effects in international trade, where the small country usually gains from trade and the large country may lose.
TSPs (tailspike proteins) are essential infection organelles of bacteriophage P22. Upon infection, P22TSP binds to and cleaves the O-antigen moiety of the LPS (lipopolysaccharide) of its Salmonella host To elucidate the role of TSP during infection, we have studied binding to oligosaccharides and polysaccharides of Salmonella enteric Typhimurium and Enteritidis in vitro. P22TSP is a trimeric beta-helical protein with a carbohydrate-binding site on each subunit. Octasaccharide O-antigen fragments bind to P22TSP with micromolar dissociation constants. Moreover, P22TSP is an endorhamnosidase and cleaves the host O-antigen. Catalytic residues lie at the periphery of the high-affinity binding site, which enables unproductive binding modes, resulting in slow hydrolysis. However, the role of this hydrolysis function during infection remains unclear. Binding of polysaccharide to P22TSP is of high avidity with slow dissociation rates when compared with oligosaccharides. In vivo, the infection of Salmonella with phage P22 can be completely inhibited by the addition of LPS, indicating that binding of phage to its host via TSP is an essential step for infection.
Tailspike interactions with lipopolysaccharide effect DNA ejection from phage P22 particles in vitro
(2010)
Initial attachment of bacteriophage P22 to the Salmonella host cell is known to be mediated by interactions between lipopolysaccharide (LPS) and the phage tailspike proteins (TSP), but the events that subsequently lead to DNA injection into the bacterium are unknown. We used the binding of a fluorescent dye and DNA accessibility to DNase and restriction enzymes to analyze DNA ejection from phage particles in vitro. Ejection was specifically triggered by aggregates of purified Salmonella LPS but not by LPS with different O-antigen structure, by lipid A, phospholipids, or soluble O-antigen polysaccharide. This suggests that P22 does not use a secondary receptor at the bacterial outer membrane surface. Using phage particles reconstituted with purified mutant TSP in vitro, we found that the endorhamnosidase activity of TSP degrading the O-antigen polysaccharide was required prior to DNA ejection in vitro and DNA replication in vivo. If, however, LPS was pre-digested with soluble TSP, it was no longer able to trigger DNA ejection, even though it still contained five O-antigen oligosaccharide repeats. Together with known data on the structure of LPS and phage P22, our results suggest a molecular model. In this model, tail-spikes position the phage particles on the outer membrane surface for DNA ejection. They force gp26, the central needle and plug protein of the phage tail machine, through the core oligosaccharide layer and into the hydrophobic portion of the outer membrane, leading to refolding of the gp26 lazo-domain, release of the plug, and ejection of DNA and pilot proteins.
Bei der Entlassung von Mitarbeitern sind Interessenkonflikte vorprogrammiert. Gut begründete Positionen stehen sich bei diesen folgenreichen Personalentscheidungen oft unversöhnlich gegenüber. In den letzten Jahren waren vermehrt Kündigungen aufgrund von Bagatelldelikten in den Medien präsent. So wurde einer Kassiererin fristlos gekündigt, weil sie zwei Pfandbons unterschlagen haben sollte. Angesichts der Finanz- und Wirtschaftskrise, in der Banken Milliarden fehlinvestierten die Bankmanager jedoch kaum zur Rechenschaft gezogen wurden, verstärkte sich der Eindruck unbotmäßiger Härte und Ungerechtigkeit. Aber ist dieser Eindruck gerechtfertigt? Unterschiedliche Urteile der Instanzgerichte zu Bagatellkündigungen zeigen, dass im Arbeitsrecht nicht abschließend geklärt ist, wie in solchen Bagatellkündigungsfällen verfahren werden soll. Zudem stellt die Rechtskonformität einer Kündigung ohnehin kein abschließendes Kriterium dafür dar, ob sie auch aus ethischer Sicht gut ist. Das Ziel der Arbeit ist daher die Frage zu beantworten, wie Bagatellkündigungen moralisch zu bewerten sind. Ethisch relevante Aspekte werden zur Unterstützung von Personalentscheidungen in der Praxis identifiziert. Zunächst werden als Überblick die Ergebnisse einer Medienrecherche zu den Bagatellkündigungen dargestellt. Im ersten Untersuchungsschritt wird gefragt, warum eine Kündigung als Auflösung einer privaten Vertragsbeziehung rechtfertigungsbedürftig ist. An Praxisbeispielen wird dargestellt, welche Regelungen zum Kündigungsschutz bestehen und wie diese durch die Spezifika der Arbeitsbeziehung anhand ethischer Aspekte begründet werden. Bezugnehmend auf die Stakeholder-Sicht auf Wirtschaftsunternehmen und Überlegungen der Agenturtheorie wird gezeigt, dass die Beziehung im Arbeitskontext Spezifika aufweist, die übergebührliche Rechte und Pflichten begründen und auch in der psychologischen impliziten Vertragsbeziehung ihren Ausdruck finden. Es wird gezeigt, dass sich – insbesondere bei langjährigen Vertragsverhältnissen – ein prima-facie-Recht der Arbeitnehmer nicht gekündigt zu werden begründen lässt. Dieses Recht liegt im Status der Arbeitnehmer als rationalen moralfähigen Personen mit Anspruch auf Achtung ihrer Würde begründet. Aus der Personenhaftigkeit der Mitarbeiter entspringt der legitime Anspruch, rationale Gründe für Entscheidungen, welche sie betreffen, genannt zu bekommen. Es wird argumentiert, ein Arbeitgeber dürfe die Arbeitsbeziehung nur aufkündigen, wenn es hierfür objektiv gute Gründe gibt – ein grundsätzlicher Kündigungsschutz ist also nicht nur rechtlich sondern auch moralisch geboten. Daher schließt sich die Frage an, ob das Bagatelldelikt als Vertragspflichtverletzung ein guter objektiver Grund ist, welcher eine Kündigung rechtfertigt. Von Seiten der Kündigungsbefürworter wird argumentiert, das Vertrauensverhältnis sei durch die Tat zerstört. Daher wird geprüft, ob der Vertrauensverlust aufgrund des Bagatelldiebstahls ein guter Grund für die Kündigung ist. Ob das Bagatelldelikt als objektiver Grund für den Vertrauensverlust gewertet werden kann, hängt nun davon ab, ob der Mitarbeiter das Vertrauen tatsächlich missbraucht hat. Daraus folgt, dass sich die moralische Bewertung des Delikts an Prinzipien orientiert, die auch im Strafrecht gelten (Schuldprinzip, Unschuldsvermutung, Rechtsprinzips, Ultima-Ratio-Prinzip). Das Ergebnis der Untersuchung ist: Bagatelldelikte können aufgrund ihrer Spezifika anhand dieser gültigen Prinzipien schwerlich als objektiver Grund angesehen werden, der eine fristlose Kündigung ohne vorherige Abmahnung rechtfertigt. Abschließend wird gezeigt, dass auch die vermeintliche präventive Wirkung der Kündigung nicht als guter Kündigungsgrund gelten kann. Mit spezialpräventiven Gründen kann die Kündigung ebenso wenig wie mit positiver als auch negativer generalpräventiver Wirkungen begründet werden. Insbesondere stellt eine Kündigung aus generalpräventiven Zwecken eine illegitime Instrumentalisierung des Mitarbeiters als Person dar. Zwar können Kündigungen bei Bagatelldelikten durchaus nicht nur arbeitsrechtlich, sondern auch moralisch gerechtfertigt sein. Aufgrund der Spezifika der Bagatelldelikte und der Vertrauenskündigung ist die fristlose Kündigung in den meisten vorliegenden Fällen aus ethischer Sicht aber nicht akzeptabel. Hohe Anforderungen an die Objektivität des Vertrauensverlustes, der als Kündigungsgrund dienen soll, sind aufgrund der schwächeren Machtposition der Mitarbeiter notwendig und klug im Sinne der Wahrung des betrieblichen und gesellschaftlichen Friedens. Es wird daher für ein grundsätzliches Abmahnungsgebot bei Bagatelldiebstählen plädiert, welche weitergehend durch eine Wertgrenze definiert werden können. Weitere Maßnahmen, mit denen man missbräuchlichen Bagatelldeliktkündigungen vorbeugen oder auf Bagatelldelikte reagieren kann werden im Ausblick genannt.
Understanding the natural history of model organisms is important for the effective use of their genomic resourses. Arabidopsis lyrata has emerged as a useful plant for studying ecological and evolutionary genetics, based on its extensive natural variation, sequenced genome and close relationship to A. thaliana. We studied genetic diversity across the entire range of European Arabidopsis lyrata ssp. petraea, in order to explore how population history has influenced population structure. We sampled multiple populations from each region, using nuclear and chloroplast genome markers, and combined population genetic and phylogeographic approaches. Within-population diversity is substantial for nuclear allozyme markers (mean P = 0.610, A(e) = 1.580, H-e = 0.277) and significantly partitioned among populations (F- ST = 0.271). The Northern populations have modestly increased inbreeding (F-IS = 0.163 verses F-IS = 0.093), but retain comparable diversity to central European populations. Bottlenecks are common among central and northern Europe populations, indicating recent demographic history as a dominant factor in structuring the European diversity. Although the genetic structure was detected at all geographic scales, two clear differentiated units covering northern and central European areas (F-CT = 0.155) were identified by Bayesian analysis and supported by regional pairwise F-CT calculations. A highly similar geographic pattern was observed from the distribution of chloroplast haplotypes, with the dominant northern haplotypes absent from central Europe. We conclude A. l. petraea's cold-tolerance and preference for disturbed habitats enabled glacial survival between the alpine and Nordic glaciers in central Europe and an additional cryptic refugium. While German populations are probable peri-glacial leftovers, Eastern Austrian populations have diversity patterns possibly compatible with longer-term survival.
Personalauswahlentscheidungen zeichnen sich durch eine hohe Komplexität aus. Die damit verbundene Unsicherheit lässt Entscheider vielfach die Verantwortung an teure Personalauswahlverfahren oder an Personalberater abgeben. Diese Arbeit gibt einen Überblick über die bestehende Personalauswahlforschung und zeigt dabei auf, wie das rationale Paradigma in der Personalauswahl Emotionen als Entscheidungshilfe bisher systematisch ausgegrenzt. Denn Personalverantwortliche stoßen im Rahmen der Auswahlentscheidung immer wieder auf die Frage nach dem „richtigen“ Verhältnis von Emotionen und Verstand: Kann oder soll ich sogar meinen Gefühlen vertrauen? Um eine Antwort auf diese Frage zu finden, wurden mehrere Entscheider vom Top-Management bis zum Kleinunternehmer befragt. Das Ergebnis ist eine Studie, welche die vielfältigen Strategien im Umgang mit Emotionen in Entscheidungsprozessen analysiert und darstellt. Es wird aufgezeigt, wie Emotionen einerseits Entscheider behindern, stören und Kosten verursachen und wie man anderseits mit einer gewinnbringenden Integration von Emotionen zu besseren Personalentscheidungen gelangen kann. Dabei verknüpft die vorliegende Untersuchung die neuesten Erkenntnisse der Hirnforschung mit der praxisorientierten Welt von Personalentscheidern. Emotionen sind Teil von Entscheidungen. Dies für sich zu erkennen und richtig zu nutzen, führt nach Ansicht des Autors zu besseren und zufriedenstellenderen Entscheidungen.
In most mammals, females are philopatric while males disperse in order to avoid inbreeding. We investigated social structure in a solitary ungulate, the bushbuck Tragelaphus sylvaticus in Queen Elizabeth National Park, Uganda by combining behavioural and molecular data. We correlated spatial and social vicinity of individual females with a relatedness score obtained from mitochondrial DNA analysis. Presumed clan members shared the same haplotype, showed more socio-positive interactions and had a common home range. Males had a higher haplotype diversity than females. All this suggests the presence of a matrilineal structure in the study population. Moreover, we tested natal dispersal distances between male and female yearlings and used control region sequences to confirm that females remain in their natal breeding areas whereas males disperse. In microsatellite analysis, males showed a higher genetic variability than females. The impoverished genetic variability of females at both molecular marker sets is consistent with a philopatric and matrilineal structure, while the higher degree of genetic variability of males is congruent with a higher dispersal rate expected in this sex. Evidence even for male long-distance dispersal is brought about by one male carrying a haplotype of a different subspecies, previously not described to occur in this area.
WIP proteins form a plant specific subfamily of C2H2 zinc finger (ZF) proteins. In this study, we functionally characterized the WIP domain, which consists of four ZF motifs, and discuss molecular functions for WIP proteins. Mutations in each of the ZFs lead to loss of function of the TT1/WIP1 protein in Arabiopsis thaliana. SV40 type nuclear localisation signals were detected in two of the ZFs and functionally characterized using GFP fusions as well as new mutant alleles identified by TILLING. Promoter swap experiments showed that selected WIP proteins are partially able to take over TT1 function. Activity of the AtBAN promoter, a potential TT1 target, could be increased by the addition of TT1 to the TT2-TT8-TTG1 regulatory complex.
The modular structure is pervasive in many complex networks of interactions observed in natural, social and technological sciences. Its study sheds light on the relation between the structure and the function of complex systems. Generally speaking, modules are islands of highly connected nodes separated by a relatively small number of links. Every module can have the contributions of links from any node in the network. The challenge is to disentangle these contributions to understand how the modular structure is built. The main problem is that the analysis of a certain partition into modules involves, in principle, as much data as the number of modules times the number of nodes. To confront this challenge, here we first define the contribution matrix, the mathematical object containing all the information about the partition of interest, and then we use truncated singular value decomposition to extract the best representation of this matrix in a plane. The analysis of this projection allows us to scrutinize the skeleton of the modular structure, revealing the structure of individual modules and their interrelations.
PaRDeS. Zeitschrift der Vereinigung für Jüdische Studien e.V., möchte die fruchtbare und facettenreiche Kultur des Judentums sowie seine Berührungspunkte zur Umwelt in den unterschiedlichen Bereichen dokumentieren. Daneben dient die Zeitschrift als Forum zur Positionierung der Fächer Jüdische Studien und Judaistik innerhalb des wissenschaftlichen Diskurses sowie zur Diskussion ihrer historischen und gesellschaftlichen Verantwortung.
rezensiertes Werk: Leshonot yehude Sefarad ve-ha-mizrach vesifruyotehem / Languages and literatures of Sephardic and Oriental Jews. - Jerusalem : Misgav Yerushalayim, 2009. - 484 S. [hebr.] + 434 S. [lat.], ; Ill.
In a very simplified view, the plant leaf growth can be reduced to two processes, cell division and cell expansion, accompanied by expansion of their surrounding cell walls. The vacuole, as being the largest compartment of the plant cell, plays a major role in controlling the water balance of the plant. This is achieved by regulating the osmotic pressure, through import and export of solutes over the vacuolar membrane (the tonoplast) and by controlling the water channels, the aquaporins. Together with the control of cell wall relaxation, vacuolar osmotic pressure regulation is thought to play an important role in cell expansion, directly by providing cell volume and indirectly by providing ion and pH homestasis for the cytosoplasm. In this thesis the role of tonoplast protein coding genes in cell expansion in the model plant Arabidopsis thaliana is studied and genes which play a putative role in growth are identified. Since there is, to date, no clearly identified protein localization signal for the tonoplast, there is no possibility to perform genome-wide prediction of proteins localized to this compartment. Thus, a series of recent proteomic studies of the tonoplast were used to compile a list of cross-membrane tonoplast protein coding genes (117 genes), and other growth-related genes from notably the growth regulating factor (GRF) and expansin families were included (26 genes). For these genes a platform for high-throughput reverse transcription quantitative real time polymerase chain reaction (RT-qPCR) was developed by selecting specific primer pairs. To this end, a software tool (called QuantPrime, see http://www.quantprime.de) was developed that automatically designs such primers and tests their specificity in silico against whole transcriptomes and genomes, to avoid cross-hybridizations causing unspecific amplification. The RT-qPCR platform was used in an expression study in order to identify candidate growth related genes. Here, a growth-associative spatio-temporal leaf sampling strategy was used, targeting growing regions at high expansion developmental stages and comparing them to samples taken from non-expanding regions or stages of low expansion. Candidate growth related genes were identified after applying a template-based scoring analysis on the expression data, ranking the genes according to their association with leaf expansion. To analyze the functional involvement of these genes in leaf growth on a macroscopic scale, knockout mutants of the candidate growth related genes were screened for growth phenotypes. To this end, a system for non-invasive automated leaf growth phenotyping was established, based on a commercially available image capture and analysis system. A software package was developed for detailed developmental stage annotation of the images captured with the system, and an analysis pipeline was constructed for automated data pre-processing and statistical testing, including modeling and graph generation, for various growth-related phenotypes. Using this system, 24 knockout mutant lines were analyzed, and significant growth phenotypes were found for five different genes.
Ghana ist ein Musterbeispiel dafür, dass ein Entwicklungsland den Weg zu Good Governance schaffen kann. In vielen Studien wird dem Land im afrikanischen Vergleich heute bescheinigt, hier ein Vorreiter zu sein. Dies ist Ausgangslage der vorliegenden Studie, die der Frage nachgeht „Welche Gründe, Muster und Bedingungen führen zur Entstehung von Good Governance?“. Im Zentrum der vorliegenden Studie steht, wie aus der erkenntnisleitenden Fragestellung hervorgeht, eine empirische Untersuchung zur Entstehung von Good Governance und damit ein Transformationsprozess. Dieser wird bewusst über einen sehr langen Zeitraum (über ein halbes Jahrhundert) untersucht, um auch langfristige Entwicklungen einbeziehen zu können. Die Studie wird mit Hilfe eines „Mixed-Methods-Ansatzes“ sowohl unter Rückgriff auf quantitative als auch auf qualitative Methoden durchgeführt, was sich im Rückblick als sehr ertragreich erwiesen hat. Zunächst wird die Qualität der Governance über den gesamten Zeitraum anhand von sechs Indikatoren gemessen. Danach werden qualitativ die Gründe für die Fort- und Rückschritte analysiert. Dabei lassen sich immer wieder Systematiken herausarbeiten, wie zum Beispiel zirkuläre Entwicklungen, die über viele Jahre den Weg hin zu Good Governance verhinderten, bis jeweils Ausbrüche aus den Kreisläufen geschafft werden konnten. Sowohl in der demokratischen und rechtsstaatlichen Entwicklung als auch bezogen auf die Versorgung der Bevölkerung mit öffentlichen Gütern und die wirtschaftliche Entwicklung. Auch wenn die verschiedenen Bereiche von Good Governance zunächst einzeln untersucht werden, so zeigen sich gleichzeitig deutlich die Wechselwirkungen der Komponenten. Zum Beispiel kristallisiert sich klar heraus, dass Rechtsstaatlichkeit sowohl auf die Stabilität politischer Systeme wirkt, als auch auf die wirtschaftliche Entwicklung. Ebenso beeinflussen diese wiederum die Korruption. Ähnliche Verknüpfungen lassen sich auch bei allen anderen Bereichen nachvollziehen. Die Entwicklung eines Landes kann also nur unter Berücksichtigung eines komplexen Governance-Systems verstanden und erklärt werden. Dabei können die Wechselwirkungen entweder konstruktiv oder destruktiv sein. Die Verflechtungen der einzelnen Bereiche werden in einem Negativ- und dann in einem Positiv-Szenario festgehalten. Diese Idealtypen-Bildung spitzt die Erkenntnisse der vorliegenden Arbeit zu und dient dem analytischen Verständnis der untersuchten Prozesse. Die Untersuchung zeigt, wie Good Governance über das Zusammenspiel verschiedener Faktoren entstehen kann und dass es wissenschaftlich sehr ertragreich ist, Transformationsforschung auf ein komplexes Governance-System auszuweiten. Hierbei werden die vielen empirisch erarbeiteten Ergebnisse zu den einzelnen Transformationen zu komplexen, in sich greifenden Gesamtszenarien zusammengeführt. Da es bisher keine explizite Good Governance-Transformationsforschung gab, wurde hiermit ein erster Schritt in diese Richtung getan. Es wird darüber hinaus deutlich, dass eine Transformation zu Good Governance nicht durch eine kurzfristige Veränderung der Rahmenbedingungen zu erreichen ist. Es geht um kulturelle Veränderungen, um Lernprozesse, um langfristige Entwicklungen, die in der Studie am Beispiel Ghana analysiert werden. In vielen vorangegangenen Transformationsstudien wurde diese zeitliche Komponente vernachlässigt. Ghana hat bereits viele Schritte getan, um einen Weg in die Zukunft und zu Good Governance zu finden. Die Untersuchung dieser Schritte ist Kern der vorliegenden Arbeit. Der Weg Ghanas ist jedoch noch nicht abgeschlossen.
We investigated herd-sizes and herd-compositions of Impala (Aepyceros melampus) inside a protected area [Lake Mburo National Park (LMNP) in western Uganda] and the unprotected adjacent ranchland [the Ankole Ranching Scheme (ARS)]. Impala experience intense hunting and poaching in the study area, and poaching is especially strong on the ARS. We found evidence for changes in overall group-sizes in both mixed-sex and pure bachelor herds between areas in and outside LMNP. Mixed-sex herds strongly decreased in size outside the National Park, but bachelor herds even slightly increased in size. While the group-composition of mixed-sex herds was very similar in areas in and outside LMNP, bachelor herds comprised more yearlings and subadult males on the ARS. Our study suggests that effects of hunting and other human nuisance may differ between herd types: mixed herds probably decrease in size because females are more strongly hunted. Around LMNP, impala are usually hunted using nets and spears, thereby increasing the hunters' chance of being injured. Poachers therefore prefer hornless females (and their calves), as it is less dangerous to handle net-caught females than males. As a result, males are less hunted, but increased vigilance and, therefore, reduced aggression among the members of a bachelor herd, may account for the observed increase in herd sizes and changes in group-compositions.
Companies develop process models to explicitly describe their business operations. In the same time, business operations, business processes, must adhere to various types of compliance requirements. Regulations, e.g., Sarbanes Oxley Act of 2002, internal policies, best practices are just a few sources of compliance requirements. In some cases, non-adherence to compliance requirements makes the organization subject to legal punishment. In other cases, non-adherence to compliance leads to loss of competitive advantage and thus loss of market share. Unlike the classical domain-independent behavioral correctness of business processes, compliance requirements are domain-specific. Moreover, compliance requirements change over time. New requirements might appear due to change in laws and adoption of new policies. Compliance requirements are offered or enforced by different entities that have different objectives behind these requirements. Finally, compliance requirements might affect different aspects of business processes, e.g., control flow and data flow. As a result, it is infeasible to hard-code compliance checks in tools. Rather, a repeatable process of modeling compliance rules and checking them against business processes automatically is needed. This thesis provides a formal approach to support process design-time compliance checking. Using visual patterns, it is possible to model compliance requirements concerning control flow, data flow and conditional flow rules. Each pattern is mapped into a temporal logic formula. The thesis addresses the problem of consistency checking among various compliance requirements, as they might stem from divergent sources. Also, the thesis contributes to automatically check compliance requirements against process models using model checking. We show that extra domain knowledge, other than expressed in compliance rules, is needed to reach correct decisions. In case of violations, we are able to provide a useful feedback to the user. The feedback is in the form of parts of the process model whose execution causes the violation. In some cases, our approach is capable of providing automated remedy of the violation.
A series of new 2 2'-bipyridine/1 2-dithiolate transition metal complexes has been synthesised and characterised As 1,2-dithiolate ligands 1,2 dithiooxalate (dto) and 1 2-dithiosquarate (dtsq) were used It follows from the IR spectra that the multidentate dithiolate ligands coordinate exclusively via their sulfur atoms forming an MN2S2 coordination sphere The central metal ions (M) are Cu2+ Ni2+ Pd2+ Pt2+, and Zn2+ The complex [Cu-II(bpy)(dto)] could be studied by EPR spectroscopy and was measured as powder diamagnetically diluted in the isostructural [Ni-II(bpy)(dto)] host structure The spin density contribution calculated from the experimental parameters is compared with the electronic situation in the frontier orbitals namely in the semi occupied SOMO of the copper complex derived from quantum chemical calculations on different levels (EHT and DFT)
A series of new N2S2 mixed ligand transition metal complexes, where N-2 is phenanthroline and S-2 is 1,2- dithiooxalate (dto) or 1,2-dithiosquarate (dtsq), has been synthesized and characterized. IR spectra reveal that the 1,2- dithiolate ligands are coordinated via the sulfur atoms forming a N2S2 coordination sphere. The copper(II) complex [Cu(phen)(dto)] was studied by EPR spectroscopy as a diamagnetically diluted powder. The diamagnetic dilution resulted from doping of the copper complex into the isostructural host lattice of the nickel complex [Ni(phen)(dto)]. The electronic situation in the frontier orbitals of the copper complex calculated from the experimental data is compared to the results of EHT and DFT calculations. Furthermore, one side product, chlorobis(1,10-phenanthroline)copper(I) ethanol solvate hydrate [(phen)(2)CuCl]center dot C2H5OH center dot H2O, was formed by a reduction process and characterized by X-ray diffraction. In the crystal packing one-dimensional columns of dimers are formed, stabilized by significant pi-pi interactions.
We report on attempts towards the synthesis of titanium nanoparticles using a wet chemical approach in imidazolium-based ionic liquids (ILs) under reducing conditions. Transmission electron microscopy finds nanoparticles in all cases. UV/Vis spectroscopy confirms the nanoparticulate nature of the precipitate, as in all cases an absorption band between ca. 280 and 300 nm is visible. IR spectroscopy shows that even after extensive washing and drying, some IL remains adsorbed on the nanoparticles. Raman spectroscopy suggests the formation of anatase nanoparticles, but X-ray diffraction reveals that, possibly, amorphous titania forms or that the nanoparticles are so small that a clear structure assignment is not possible. The report thus shows that (possibly amorphous) titanium oxides even form under reducing conditions and that the chemical synthesis of titanium nanoparticles in ILs remains elusive.