TY - THES
A1 - Hohberger, Horst
T1 - Semiclassical asymptotics for the scattering amplitude in the presence of focal points at infinity
Y1 - 2006
CY - Potsdam
ER -
TY - THES
A1 - Hohberger, Horst
T1 - Semiclassical asymptotics for the scattering amplitude in the presence of focal points at infinity
T1 - Semiklassische Asymptotik der Streuamplitude bei unendlich fernen Fokalpunkten
N2 - We consider scattering in $\R^n$, $n\ge 2$, described by the Schr\"odinger operator $P(h)=-h^2\Delta+V$, where $V$ is a short-range potential. With the aid of Maslov theory, we give a geometrical formula for the semiclassical asymptotics as $h\to 0$ of the scattering amplitude $f(\omega_-,\omega_+;\lambda,h)$ $\omega_+\neq\omega_-$) which remains valid in the presence of focal points at infinity (caustics). Crucial for this analysis are precise estimates on the asymptotics of the classical phase trajectories and the relationship between caustics in euclidean phase space and caustics at infinity.
N2 - Wir betrachten Streuung in $\R^n$, $n\ge 2$, beschrieben durch den Schr\"odinger operator $P(h)=-h^2\Delta+V$, wo $V$ ein kurzreichweitiges Potential ist. Mit Hilfe von Maslov Theorie erhalten wir eine geometrische Formel fuer die semiklassische Asymptotik ($h\to 0$) der Streuamplitude $f(\omega_-,\omega_+;\lambda,h)$ ($\omega_+\neq\omega_-$) welche auch bei Vorhandensein von Fokalpunkten bei Unendlich (Kaustiken) gueltig bleibt.
KW - Mathematik
KW - Physik
KW - Streutheorie
KW - Streuamplitude
KW - Semiklassik
KW - mathematics
KW - physics
KW - scattering theory
KW - semiclassics
KW - scattering amplitude
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-11574
ER -
TY - JOUR
A1 - Kofod, Guggi
A1 - Paajanen, Mika
A1 - Bauer, Siegfried
T1 - Self-organized minimum-energy structures for dielectric elastomer actuators
Y1 - 2006
UR - http://www.springerlink.com/content/100501
U6 - https://doi.org/10.1007/s00339-006-3680-3
SN - 0947-8396
ER -
TY - JOUR
A1 - Torjek, Otto
A1 - Witucka-Wall, Hanna
A1 - Meyer, Rhonda C.
A1 - von Korff, Maria
A1 - Kusterer, Barbara
A1 - Rautengarten, Carsten
A1 - Altmann, Thomas
T1 - Segregation distortion in Arabidopsis C24/Col-0 and Col-0/C24 recombinant inbred line populations is due to reduced fertility caused by epistatic interaction of two loci
JF - Theoretical and applied genetics
N2 - A new large set of reciprocal recombinant inbred lines (RILs) was created between the Arabidopsis accessions Col-0 and C24 for quantitative trait mapping approaches, consisting of 209 Col-0 x C24 and 214 C24 x Col-0 F-7 RI lines. Genotyping was performed using 110 evenly distributed framework single nucleotide polymorphism markers, yielding a genetic map of 425.70 cM, with an average interval of 3.87 cM. Segregation distortion (SD) was observed in several genomic regions during the construction of the genetic map. Linkage disequilibrium analysis revealed an association between a distorted region at the bottom of chromosome V and a non-distorted region on chromosome IV. A detailed analysis of the RILs for these two regions showed that an SD occurred when homozygous Col-0 alleles on chromosome IV coincided with homozygous C24 alleles at the bottom of chromosome V. Using nearly isogenic lines segregating for the distorted region we confirmed that this genotypic composition leads to reduced fertility and fitness.
Y1 - 2006
U6 - https://doi.org/10.1007/s00122-006-0402-3
SN - 0040-5752
VL - 113
SP - 1551
EP - 1561
PB - Springer
CY - Berlin
ER -
TY - CHAP
A1 - Lücking, Andy
A1 - Rieser, Hannes
A1 - Staudacher, Marc
T1 - SDRT and multi-modal situated communication
N2 - Classical SDRT (Asher and Lascarides, 2003) discussed essential features of dialogue like adjacency pairs or corrections and up-dating. Recent work in SDRT (Asher, 2002, 2005) aims at the description of natural dialogue. We use this work to model situated communication, i.e. dialogue, in which sub-sentential utterances and gestures (pointing and grasping) are used as conventional modes of communication. We show that in addition to cognitive modelling in SDRT, capturing mental states and speech-act related goals, special postulates are needed to extract meaning out of contexts. Gestural meaning anchors Discourse Referents in contextually given domains. Both sorts of meaning are fused with the meaning of fragments to get at fully developed dialogue moves. This task accomplished, the standard SDRT machinery, tagged SDRSs, rhetorical relations, the up-date mechanism, and the Maximize Discourse Coherence constraint generate coherent structures. In sum, meanings from different verbal and non-verbal sources are assembled using extended SDRT to form coherent wholes.
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-10348
ER -
TY - CHAP
A1 - DeVault, David
A1 - Stone, Matthew
T1 - Scorekeeping in an uncertain language game
N2 - Received views of utterance context in pragmatic theory characterize the occurrent subjective states of interlocutors using notions like common knowledge or mutual belief. We argue that these views are not compatible with the uncertainty and robustness of context-dependence in humanhuman dialogue. We present an alternative characterization of utterance context as objective and normative. This view reconciles the need for uncertainty with received intuitions about coordination and meaning in context, and can directly inform computational approaches to dialogue.
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-10448
ER -
TY - GEN
A1 - Christmann, Olivia
A1 - Warlouzet, Laurent
T1 - Scenarios of "Europe-puissance" : the French foreign policy in Europe by 2020
N2 - Forum: EU-Diplomatie im Jahre 2020
KW - Europäische Verfassung
KW - Supermacht
KW - Politik
KW - Wirtschaft
KW - Regierungskooperation
KW - European Constitution
KW - superpower
KW - politics
KW - economy
KW - intergovernmental cooperation
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-48399
ER -
TY - CHAP
A1 - Rossmanith, Eva
A1 - Blaum, Niels
A1 - Keil, Manfred
A1 - Langerwisch, F.
A1 - Meyer, Jork
A1 - Popp, Alexander
A1 - Schmidt, Michael
A1 - Schultz, Christoph
A1 - Schwager, Monika
A1 - Vogel, Melanie
A1 - Wasiolka, Bernd
A1 - Jeltsch, Florian
T1 - Scaling up local population dynamics to regional scales
BT - an integrated approach
N2 - In semi-arid savannas, unsustainable land use can lead to degradation of entire landscapes, e.g. in the form of shrub encroachment. This leads to habitat loss and is assumed to reduce species diversity. In BIOTA phase 1, we investigated the effects of land use on population dynamics on farm scale. In phase 2 we scale up to consider the whole regional landscape consisting of a diverse mosaic of farms with different historic and present land use intensities. This mosaic creates a heterogeneous, dynamic pattern of structural diversity at a large spatial scale. Understanding how the region-wide dynamic land use pattern affects the abundance of animal and plant species requires the integration of processes on large as well as on small spatial scales. In our multidisciplinary approach, we integrate information from remote sensing, genetic and ecological field studies as well as small scale process models in a dynamic region-wide simulation tool.
Interdisziplinäres Zentrum für Musterdynamik und Angewandte Fernerkundung Workshop vom 9. - 10. Februar 2006.
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-7320
N1 - [Poster]
ER -
TY - JOUR
A1 - Haußig, Hans-Michael
T1 - Roy, A., Marriage Customs and Ceremonies in World Religions; Victory B.C., Trafford, 2005
BT - Marriage Customs and Ceremonies in World Religions
Y1 - 2006
SN - 0948-0471
ER -
TY - JOUR
A1 - Stepanov, Arthur
T1 - Robert Frank: Phrase structure composition and syntactic dependencies / rezensiert von Arthur Stepanov
JF - Lingua : international review of general linguistics
N2 - Rezensiertes Werk:
Frank, Robert: Phrase Structure Composition and Syntactic Dependencies. - Cambridge, MA : MIT Press, 2002. - xiv + 326 S.
Y1 - 2006
U6 - https://doi.org/10.1016/j.lingua.2005.06.002
SN - 0024-3841
VL - 116
IS - 12
SP - 2259
EP - 2272
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Schlör, Joachim
T1 - Road, path, panorama : travel ways and landscape variations from 1930 to 1990
Y1 - 2006
SN - 0149-7952
ER -
TY - JOUR
A1 - Schmidt, Bernd
A1 - Hermanns, Jolanda
T1 - Ring closing metathesis of substrates containing more than two C-C-double bonds : rapid access to functionalized heterocycles
N2 - In most cases where ring closing metathesis is applied to the synthesis of heterocycles, alpha,omega-dienes are used as precursors. If substrates containing more than two double bonds are subjected to a metathesis reaction, carba- or heterocycles bearing additional exocyclic alkene functionality result, or multiple ring closing processes occur. This offers interesting and potentially very useful synthetic perspectives. On the other hand, selectivity problems need to be addressed as the cyclization of substrates with more than two double bonds available for olefin metathesis may result in constitutional isomers or stereoisomers. This review highlights problems and opportunities evolving from ring closing metathesis of tri-, tetra-, and polyenes as a strategy for the selective synthesis of functionalized heterocycles. The chapter on RCM of trienes is subdivided according to the symmetry of the metathesis precursor. The following two chapters deal with the double or multiple RCM of tetra- or polyenes. These processes are further classified according to the preferred cyclization mode. Finally, the application of cascade or domino metathesis reactions to the synthesis of heterocycles will be discussed. These processes can be classified into those where exclusively C-C-double bonds take part in the metathesis reaction, and those where one or more C-C-triple bonds are involved
Y1 - 2006
ER -
TY - JOUR
A1 - Landa, Polina S.
A1 - Ushakov, Vladimir
A1 - Kurths, Jürgen
T1 - Rigorous theory of stochastic resonance in overdamped bistable oscillators for weak signals
JF - Chaos, solitons & fractals : applications in science and engineering
N2 - The results of the theoretical consideration of stochastic resonance in overdamped bistable oscillators are given. These results are founded not on the model of two states as in [McNamara B, Wiesenfeld K. Theory of stochastic resonance. Phys Rev A 1989;39:4854-69], but on splitting of motion into regular and random and the rigorous solution of the Fokker-Planck equation for the random component. We show that this resonance is caused by a change, under the influence of noise, of the system's effective stiffness and damping factor contained in the equation for the regular component. For a certain value of the noise intensity the effective stiffness is minimal, and this fact causes non-monotonic change of the output signal amplitude as the noise intensity changes. It is important that the location of the minimum and its value depend essentially on the signal frequency.
Y1 - 2006
UR - http://www.sciencedirect.com/science/journal/09600779
U6 - https://doi.org/10.1016/j.chaos.2005.08.116
SN - 0960-0779
VL - 30
IS - 3
SP - 574
EP - 578
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Neumann, Meina
A1 - Schulte, Marc
A1 - Jünemann, Nora
A1 - Stöcklein, Walter F. M.
A1 - Leimkühler, Silke
T1 - Rhodobacter capsulatus XdhC is involved in molybdenum cofactor binding and insertion into xanthine dehydrogenase
N2 - Rhodobacter capsulatus xanthine dehydrogenase (XDH) is a cytoplasmic enzyme with an (alpha beta) 2 heterodimeric structure that is highly identical to homodimeric eukaryotic xanthine oxidoreductases. The crystal structure revealed that the molybdenum cofactor (Moco) is deeply buried within the protein. A protein involved in Moco insertion and XDH maturation has been identified, which was designated XdhC. XdhC was shown to be essential for the production of active XDH but is not a subunit of the purified enzyme. Here we describe the purification of XdhC and the detailed characterization of its role for XDH maturation. We could show that XdhC binds Moco in stoichiometric amounts, which subsequently can be inserted into Moco-free apo-XDH. A specific interaction between XdhC and XdhB was identified. We show that XdhC is required for the stabilization of the sulfurated form of Moco present in enzymes of the xanthine oxidase family. Our findings imply that enzyme-specific proteins exist for the biogenesis of molybdoenzymes, coordinating Moco binding and insertion into their respective target proteins. So far, the requirement of such proteins for molybdoenzyme maturation has been described only for prokaryotes
Y1 - 2006
UR - http://www.jbc.org/
U6 - https://doi.org/10.1074/jbc.M601617200
ER -
TY - BOOK
A1 - Reilich, Julia
T1 - Return to schooling in Germany
N2 - This paper tries to apply common methods to estimate unbiased coefficients for the return to schooling in Germany for the year 2004. Based on the simple Mincer-type wage equation, the return to schooling is around 9.5% per year. There is no sheepskin effect. As expected the return in the private sector is higher than in the public sector. Females have a higher return than males, but there are no differences between East and West Germans. An Instrumental Variables and a 3-Stage-Least-Squares approach give very high returns. For correcting the sample selection, the Heckman Two Step Procedure and the Heckman Maximum Likelihood Approach are used. For both methods, the coefficients are very similar, but higher than without correcting for it.
T3 - Statistische Diskussionsbeiträge - 24
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-12175
ER -
TY - THES
A1 - Rößler, Dirk
T1 - Retrieval of earthquake source parameters in inhomogeneous anisotropic mediawith application to swarm events in West Bohemia in 2000
T1 - Bestimmung von Erdbebenparametern in inhomogenen anisotropen Medien mit Anwendung auf Schwarmbeben im Vogtland im Jahr 2000
N2 - Earthquakes form by sudden brittle failure of rock mostly as shear ruptures along a rupture plane. Beside this, mechanisms other than pure shearing have been observed for some earthquakes mainly in volcanic areas. Possible explanations include complex rupture geometries and tensile earthquakes. Tensile earthquakes occur by opening or closure of cracks during rupturing. They are likely to be often connected with fluids that cause pressure changes in the pore space of rocks leading to earthquake triggering. Tensile components have been reported for swarm earthquakes in West Bohemia in 2000. The aim and subject of this work is an assessment and the accurate determination of such tensile components for earthquakes in anisotropic media. Currently used standard techniques for the retrieval of earthquake source mechanisms assume isotropic rock properties. By means of moment tensors, equivalent forces acting at the source are used to explain the radiated wavefield. Conversely, seismic anisotropy, i.e. directional dependence of elastic properties, has been observed in the earth's crust and mantle such as in West Bohemia. In comparison to isotropy, anisotropy causes modifications in wave amplitudes and shear-wave splitting. In this work, effects of seismic anisotropy on true or apparent tensile source components of earthquakes are investigated. In addition, earthquake source parameters are determined considering anisotropy. It is shown that moment tensors and radiation patterns due to shear sources in anisotropic media may be similar to those of tensile sources in isotropic media. In contrast, similarities between tensile earthquakes in anisotropic rocks and shear sources in isotropic media may exist. As a consequence, the interpretation of tensile source components is ambiguous. The effects that are due to anisotropy depend on the orientation of the earthquake source and the degree of anisotropy. The moment of an earthquake is also influenced by anisotropy. The orientation of fault planes can be reliably determined even if isotropy instead of anisotropy is assumed and if the spectra of the compressional waves are used. Greater difficulties may arise when the spectra of split shear waves are additionally included. Retrieved moment tensors show systematic artefacts. Observed tensile source components determined for events in West Bohemia in 1997 can only partly be attributed to the effects of moderate anisotropy. Furthermore, moment tensors determined earlier for earthquakes induced at the German Continental Deep Drilling Program (KTB), Bavaria, were reinterpreted under assumptions of anisotropic rock properties near the borehole. The events can be consistently identified as shear sources, although their moment tensors comprise tensile components that are considered to be apparent. These results emphasise the necessity to consider anisotropy to uniquely determine tensile source parameters. Therefore, a new inversion algorithm has been developed, tested, and successfully applied to 112 earthquakes that occurred during the most recent intense swarm episode in West Bohemia in 2000 at the German-Czech border. Their source mechanisms have been retrieved using isotropic and anisotropic velocity models. Determined local magnitudes are in the range between 1.6 and 3.2. Fault-plane solutions are similar to each other and characterised by left-lateral faulting on steeply dipping, roughly North-South oriented rupture planes. Their dip angles decrease above a depth of about 8.4km. Tensile source components indicating positive volume changes are found for more than 60% of the considered earthquakes. Their size depends on source time and location. They are significant at the beginning of the swarm and at depths below 8.4km but they decrease in importance later in the course of the swarm. Determined principle stress axes include P axes striking Northeast and Taxes striking Southeast. They resemble those found earlier in Central Europe. However, depth-dependence in plunge is observed. Plunge angles of the P axes decrease gradually from 50° towards shallow angles with increasing depth. In contrast, the plunge angles of the T axes change rapidly from about 8° above a depth of 8.4km to 21° below this depth. By this thesis, spatial and temporal variations in tensile source components and stress conditions have been reported for the first time for swarm earthquakes in West Bohemia in 2000. They also persist, when anisotropy is assumed and can be explained by intrusion of fluids into the opened cracks during tensile faulting.
N2 - Erdbeben entstehen durch plötzlichen Sprödbruch des Gesteins, meist als Scherbruch entlang einer Bruchfläche. Daneben werden für einige Beben v.a. in vulkanischen Gebieten auch Mechanismen beobachtet, die scheinbar vom Modell des Scherbruches abweichen. Ursachen dafür beinhalten komplexe Bruchgeometrien und tensile Erdbeben. Bei tensilen Erdbeben kommt es während des Bruchs zum Öffnen oder Schließen der Bruchfläche und damit zu Volumenänderungen. Erdbeben mit tensilen Anteilen stehen wahrscheinlich oft im Zusammenhang mit Fluiden, welche zur Durckänderung im Porenraum von Gesteinen und damit zum Auslösen des Bebens führen. Sie wurden auch im Vogtland während eines Erdbebenschwarms im Jahr 1997 beobachtet. Die Beurteilung und sichere Bestimmung tensiler Anteile von Erdbeben sind Ziel und Gegenstand dieser Arbeit. Bei Standardverfahren zur Bestimmung von Erdbebenmechanismen werden isotrope Gesteinseigenschaften angenommen. Momententensoren beschreiben dabei Kräfte, die das abgestrahlte Wellenfeld erklären. Allerdings wird seismische Anisotropie, d.h. Richtungsabhängigkeit elastischer Eigenschaften, in der Erdkruste und im Mantel wie z.B. im Vogtland beobachtet. Anisotropie bewirkt im Vergleich zu isotropen Medien Veränderungen der Wellenamplituden und -polariserungen sowie das Aufspalten von Scherwellen. In der vorliegenden Arbeit werden daher der Einfluss seismischer Anisotropie auf wahre oder scheinbar auftretende tensile Quellanteile untersucht und Erdbebenmechanismen unter Berücksichtigung seismischer Anisotropie bestimmt. Es wird gezeigt, dass Momententensoren und Abstrahlmuster von Scherbrüchen in anisotropen Medien denen von tensilen Brüchen in isotropen Medien ähneln können. Umgekehrt treten Ähnlichkeiten tensiler Beben in anisotropen Gesteinen mit Scherbrüchen in isotropen Medien auf. Damit existieren Mehrdeutigkeiten beobachteter tensiler Quellanteile. Die Effekte von Anisotropie hängen von der Orientierung des Bruches und vom Grad der Anisotropie ab. Außerdem beeinflusst Anisotropie das Moment eines Bebens. Herdflächenorientierungen können auch dann verlässlich bestimmt werden, wenn man Isotropie statt Anisotropie annimmt und die Spektren von Kompressionswellen verwendet. Bei Hinzunahme der Spektren von Scherwellen können Uneindeutigkeiten auftreten. Abgeleitete Momententensoren zeigen systematische Artefakte. Beobachtungen tensiler Quellanteile von Beben im Vogtland im Jahr 1997 können nicht allein durch moderate Anisotropie erklärt werden. Weiterhin wurden früher bestimmte Momententensoren induzierter Beben nahe der Kontinentalen Tiefbohrung, Bayern, unter Annahme anisotroper Parameter reinterpretiert. Die Beben werden einheitlich als Scherbrüche charakterisiert, obwohl deren Momententensoren tensile Bestandteile enthalten, die als scheinbar angesehen werden. Die Resultate unterstreichen die Notwendigkeit, seismische Anisotropie zu berücksichtigen, um tensile Komponenten von Erdbeben eindeutig zu bestimmen. Ein daher neu entwickelter Inversionsalgorithmus wurde getestet und erfolgreich auf 112 Erdbeben der letzten intensiven Schwarmepisode im Jahr 2000 im Vogtland an der deutsch-tschechischen Grenze angewandt. Die Herdparameter wurden unter Verwendung isotroper und anisotroper Geschwindigkeitsmodelle ermittelt. Die Beben zeigen Lokalmagnituden zwischen 1,6 und 3,2. Sie weisen zueinander ähnliche Herdflächenlösungen mit linkslateralem Versatz auf steil einfallenden, etwa Nord-Süd orientierten Bruchflächen auf. Die Fallwinkel nehmen oberhalb 8,4km Tiefe ab. Für über 60% der betrachteten Erdbeben werden tensile Quellanteile mit Volumenvergrößerung beobachtet. Die tensilen Komponenten zeigen Abhängigkeiten von Herdzeit und -ort. Sie sind zu Beginn des Schwarms sowie in Tiefen unterhalb 8,4km besonders signifikant und nehmen später an Bedeutung ab. Abgeleitete Hauptspannungsachsen enthalten P Achsen mit nordwestlicher und T Achsen mit südwestlicher Streichrichtung. Sie ähneln denen in Mitteleuropa. Es werden tiefenabhängige Fallwinkel beobachtet. Die Änderungen erfolgen für die P Achsen graduell von 50° hin zu flacheren Fallwinkeln bei tieferen Beben. Sie erfolgen jedoch abrupt für die T Achsen von etwa 8° oberhalb einer Tiefe von etwa 8,4km zu 21° einfallend unterhalb dessen. Mit dieser Arbeit werden erstmals zeitliche und räumliche Veränderungen tensiler Quellanteile und Spannungszustände im Vogtland für Erdbeben im Jahr 2000 beobachtet. Diese haben auch dann Bestand, wenn seismische Anisotropie berücksichtigt wird. Sie können durch Fluide erklärt werden, die in die Bruchflächen eindringen.
KW - Seismologie
KW - Momententensor
KW - Anisotropie
KW - Erdbeben
KW - Wellenausbreitung
KW - Vogtland
KW - Schwarmbeben
KW - tensile Anteile
KW - Hauptspannungsachse
KW - earthquake swarm
KW - anisotropy
KW - tensile earthquakes
KW - moment tensor
KW - West Bohemia
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-7758
ER -
TY - JOUR
A1 - Willig, Andreas
A1 - Mitschke, Robert
T1 - Results of bit error measurements with sensor nodes and casuistic consequences for design of energy-efficient error control schemes
N2 - For the proper design of energy-efficient error control schemes some insight into channel error patterns is needed. This paper presents bit error and packet loss measurements taken with sensor nodes running the popular RFM
Y1 - 2006
SN - 978-3-540-32158-3
ER -
TY - JOUR
A1 - Williams, Malcolm
T1 - Response to Erich Poppe’s Contribution on “Celtic influence on English relative clauses?”
JF - The Celtic Englishes IV : the interface between English and the Celtic languages ; proceedings of the fourth international colloquium on the "Celtic Englishes" held at the University of Potsdam in Golm (Germany) from 22-26 September 2004
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-41001
SP - 212
EP - 216
PB - Universitätsverlag Potsdam
CY - Potsdam
ER -
TY - JOUR
A1 - Poschadel, Jens R.
A1 - Meyer-Lucht, Yvonne
A1 - Plath, Martin
T1 - Response to chemical cues from conspecifics reflects male mating preference for large females and avoidance of large competitors in the European pond turtle, Emys orbicularis
N2 - We examined chemical communication in male and female European pond turtles (Emys orbicularis). In simultaneous binary choice tests, a focal animal was given a choice between pheromones from a conspecific and a choice chamber containing untreated water. Females did not show a preference, both when male and when female stimuli were presented. On the contrary, males preferred the odor of a female over untreated water, suggesting that males actively search for females. The strength of preference was positively correlated with the body size difference between the female and the focal male, indicating that males prefer to mate with larger females. Female fecundity is positively correlated with female size in E. orbicularis, which may account for male choosiness. No overall preference for the stimulus animal was observed when males were presented cues from another male. However, the strength of preference was negatively correlated with the difference in body size. Males avoided large males, but oriented towards smaller stimulus males. This reflects that males form dominance hierarchies, where large males aggressively attack smaller ones. Far-range chemical communication probably enables males to minimize the risk of costly aggressive interactions. This is, to our knowledge, the first study on the role of chemical cues for inter-and intrasexual communication in the European pond turtle
Y1 - 2006
UR - http://www.bibliothek.uni-regensburg.de/ezeit/?2007939
U6 - https://doi.org/10.1163/156853906776759510
SN - 0005-7959
ER -
TY - JOUR
A1 - Gil, Juan B.
A1 - Krainer, Thomas
A1 - Mendoza, Gerardo A.
T1 - Resolvents of elliptic cone operators
JF - Journal of functional analysis
N2 - We prove the existence of sectors of minimal growth for general closed extensions of elliptic cone operators under natural ellipticity conditions. This is achieved by the construction of a suitable parametrix and reduction to the boundary. Special attention is devoted to the clarification of the analytic structure of the resolvent.
KW - resolvents
KW - manifolds with conical singularities
KW - spectral theory
KW - parametrices
KW - boundary value problems
Y1 - 2006
U6 - https://doi.org/10.1016/j.jfa.2006.07.010
SN - 0022-1236
VL - 241
IS - 1
SP - 1
EP - 55
PB - Elsevier
CY - San Diego
ER -
TY - JOUR
A1 - Müller, C.
A1 - Weber, Edzard
A1 - Gronau, Norbert
T1 - Requirements for an integration of methods analyzing social issues in knowledge organizations
Y1 - 2006
ER -
TY - BOOK
ED - Hummel, Detlev
ED - Remde, Jörg
ED - Fliege, Felix
T1 - Reports of the 2nd German-Russian PhD Seminar : from 10th to 13th of October 2005 in Potsdam
T3 - Diskussionsbeiträge / Universität Potsdam, Wirtschafts- und Sozialwissenschaftliche Fakultät
Y1 - 2006
SN - 1433-1039
PB - Univ.
CY - Potsdam
ER -
TY - JOUR
A1 - Gessner, Jörn
A1 - Arndt, Gerd-Michael
A1 - Tiedemann, Ralph
A1 - Bartel, Ryszard
A1 - Kirschbaum, Frank
T1 - Remediation measures for the Baltic sturgeon: status review and perspectives
JF - Journal of applied ichthyology
N2 - More than one century ago, sturgeons were prevalent species in the fish communities of all major German rivers both in the North and the Baltic seas drainages. Since then, the populations declined rapidly due to river damming, overfishing and pollution. The last sturgeon catches in the Baltic drainage system occurred during the late 1960ies. Only a few individual captures have been reported during the last 30 years with the most recent records in the Lake Ladoga ( Russia), where the last confirmed catch was recorded in 1984, and a single individual caught off Estonia in 1996. Today, sturgeons are considered missing or extinct in German waters. First attempts for remediation of the species were undertaken in the mid 1990ies. Subsequently, phylogenetic and population genetic analyses of the species were carried out using mtDNA, microsatellites, and nuclear markers ( SNPs). These genetic analyses using recent and historic material have proven the existence of two different species in the Baltic Sea in what was previously considered to represent the European Atlantic sturgeon only. In the Baltic Sea, the American Atlantic sturgeon ( A. oxyrinchus) succeeded to colonize this brackish water system during the Middle Ages. In the North Sea, the European Atlantic sturgeon ( A. sturio) is considered to be the endemic species. These results led to the separation of the remediation activities in the North Sea and the Baltic Sea tributaries. Further studies on the mechanism that lead to the extinction of A. sturio in Germany and the subsequent succession of the A. oxyrinchus mtDNA haplotype are currently been carried out. Broodstock development using the northernmost populations of A. oxyrinchus is currently under way. As a further prerequisite to re-introduce this species into the Baltic, the evaluation of the status of critical habitats for the early life stages of the American Atlantic sturgeon in the River Odra has been performed in collaboration with the Institute for Inland Fisheries of Poland. Alternative fisheries techniques, based on the data of by-catch of exotic sturgeons in the fishery, are presently developed in close cooperation with the fishery to reduce fisheries related mortality in juvenile sturgeons upon release. Monitoring of habitat utilization and migration characteristics of juvenile fish upon experimental release will have to be carried out shortly, using acoustic telemetry, with the aim to follow the fate of the released fish and to determine the best time-size-release-window for future release programmes.
Y1 - 2007
U6 - https://doi.org/10.1111/j.1439-0426.2007.00925.x
SN - 0175-8659
VL - 22
IS - S1
SP - 23
EP - 31
PB - Wiley-Blackwell
CY - Oxford
ER -
TY - JOUR
A1 - Mac Mathúna, Séamus
T1 - Remarks on standardisation in irish English, Irish and Welsh
JF - The Celtic Englishes IV : the interface between English and the Celtic languages ; proceedings of the fourth international colloquium on the "Celtic Englishes" held at the University of Potsdam in Golm (Germany) from 22-26 September 2004
N2 - Content: 1. Introduction 2. Standardisation and Celticity 3. Standardisation in Irish and Other Celtic Languages 4. Borrowing and Code-Switching 5. Conclusion
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-40950
SP - 114
EP - 129
PB - Universitätsverlag Potsdam
CY - Potsdam
ER -
TY - JOUR
A1 - Frübing, Peter
A1 - Kremmer, Alexander
A1 - Gerhard, Reimund
A1 - Spanoudaki, Anna
A1 - Pissis, Polycarpos
T1 - Relaxation processes at the glass transition in polyamide 11: From rigidity to viscoelasticity
JF - The journal of chemical physics : bridges a gap between journals of physics and journals of chemistr
N2 - Relaxation processes associated with the glass transition in nonferroelectric and ferroelectric polyamide (PA) 11 are investigated by means of differential scanning calorimetry, dynamic mechanical analysis, and dielectric relaxation spectroscopy (DRS) in order to obtain information about the molecular mobility within the amorphous phase. In particular, the effects of melt quenching, cold drawing, and annealing just below the melting region are studied with respect to potential possibilities and limitations for improving the piezoelectric and pyroelectric properties of PA 11. A relaxation map is obtained from DRS that shows especially the crossover region where the cooperative alpha relaxation and the local beta relaxation merge into a single high-temperature process. No fundamental difference between quenched, cold-drawn, and annealed films is found, though in the cold-drawn (ferroelectric) film the alpha relaxation is suppressed and slowed down, but it is at least partly recovered by subsequent annealing. It is concluded that there exists an amorphous phase in all structures, even in the cold-drawn film. The amorphous phase can be more rigid or more viscoelastic depending on preparation. Cold drawing not only leads to crystallization in a ferroelectric form but also to higher rigidity of the remaining amorphous phase. Annealing just below the melting region after cold drawing causes a stronger phase separation between the crystalline phase and a more viscoelastic amorphous phase.
Y1 - 2006
U6 - https://doi.org/10.1063/1.2360266
SN - 0021-9606
VL - 125
IS - 12
PB - American Institute of Physics
CY - Melville
ER -
TY - JOUR
A1 - Frübing, Peter
A1 - Kremmer, Alexander
A1 - Gerhard, Reimund
A1 - Spannoudaki, Anna
A1 - Pissis, Polycarpos
T1 - Relaxation processes at the glass transition in polyamide 11 : From rigidity to viscoelasticity
Y1 - 2006
UR - http://jcp.aip.org/
U6 - https://doi.org/10.1063/1.2360266
SN - 0021-9606
ER -
TY - JOUR
A1 - Baas, Timo
A1 - Schrooten, Mechthild
T1 - Relationship banking and SMEs: A theoretical analysis
JF - Small business economics : an international journal
N2 - Reliable information on small- and medium-sized enterprises (SMEs) is rare and costly for financial intermediaries. Therefore relationship banking is often considered as the appropriate lending technique. In this paper we offer a theoretical model to analyze relationship banking and the pricing behavior of banks in a Bertrand competition framework with monitoring costs. We show that the lack of reliable information leads to comparable high interest rates even if a long-term relationship between borrower and bank exists. The paper offers a theoretical explanation why SMEs often are faced with borrowing constraints.
KW - accounting
KW - financial constraints
KW - relationship banking
KW - small and medium sized enterprises
Y1 - 2006
U6 - https://doi.org/10.1007/s11187-006-0018-7
SN - 0921-898X
VL - 27
SP - 127
EP - 137
PB - Springer
CY - Dordrecht
ER -
TY - JOUR
A1 - Stepan, H
A1 - Faber, R
A1 - Wessel, Niels
A1 - Wallukat, Gerd
A1 - Schultheiss, H. P.
A1 - Walther, T
T1 - Relation between circulating angiotensin II type 1 receptor agonistic autoantibodies and soluble fms-like tyrosine kinase 1 in the pathogenesis of preeclampsia
N2 - Context: Placental and circulatory soluble fms-like tyrosine kinase 1 (sFlt1) has proven to be elevated in pregnant women with preeclampsia, a disease characterized by hypertension, proteinuria, and endothelial dysfunction. Recent studies also demonstrated an autoantibody against the angiotensin II type 1 (AT1) receptor (AT1-AA) in that disease. Objective: Both factors are discussed as key players in the etiology of preeclampsia. However, it has not yet been clarified whether these two circulating factors correlate and whether synergy determines the severity of pathology. Design: AT1-AA was retrospectively determined by a bioassay and sFlt1 by an ELISA. Patients: Serum from second-trimester pregnancies with normal or abnormal uterine perfusion and in women at term with or without pregnancy pathology was analyzed. Results: Most of the preeclamptic patients were characterized by high sFlt1 levels and the presence of AT1-AA, although the agonistic effects of the antibody did not correlate with the sFlt1 concentrations (P = 0.85). Although AT1- AA was also detected in second-trimester pregnancies evidencing abnormal uterine perfusion without later pathology, sFlt1 was not significantly elevated in these pregnancies, compared with those with normal uterine perfusion. However, whereas women with abnormal perfusion and later pregnancy pathology did not differ in AT1-AA, compared with those with normal outcome, sFlt1 was significantly increased. Again, the two factors did not correlate (P = 0.15). Conclusions: We conclude that AT1-AA bioactivity and sFlt1 concentrations do not correlate, are not mutually dependent, and are thus probably involved in distinct pathogenetic mechanisms. Both factors in combination may not be causative for the early impaired trophoblast invasion and pathological uterine perfusion
Y1 - 2006
UR - http://jcem.endojournals.org/content/91/6/2424.full
U6 - https://doi.org/10.1210/Jc.2005-2698
ER -
TY - JOUR
A1 - Ruhl, R.
A1 - Fritzsche, Britta
A1 - Vermot, J.
A1 - Niederreither, K.
A1 - Neumann, U.
A1 - Schmidt, A.
A1 - Schweigert, Florian J.
A1 - Dolle, P.
T1 - Regulation of expression of the retinoic acid-synthesising enzymes retinaldehyde dehydrogenases in the uteri of ovariectomised mice after treatment with oestrogen, gestagen and their combination
N2 - The active metabolite of vitaminA, retinoic acid (RA), plays an important role in the female reproductive system. The synthesis of RA is tightly regulated by the activity of retinaldehyde dehydrogenases (Raldh). Among these, Raldh1 and Raldh2 exhibit specific temporal and spatial expression patterns in the mouse uterus, both during the oestrous cycle and early pregnancy. In the present study, we have assessed whether oestradiol and progesterone directly influence the uterine expression of Raldh1 and Raldh2 in ovariectomised mice. We investigated the effect of gestagen (promegestone 0.3 mg kg(-1) bodyweight), oestrogen (oestradiol 3 mu g kg(-1) bodyweight) and their combination on the uterine expression of Raldh2. Expression was analysed using in situ hybridisation and quantified using real-time detection reverse transcription-polymerase chain reaction. The results show that the expression of Raldh2 is rapidly (within 1-4 h) induced in stromal cells by oestrogen, but not by gestagen, treatment, whereas combined oestrogen + gestagen treatment leads to a more prolonged (48 h) response. In contrast, oestrogen, but not progesterone, treatment downregulates (within 4 - 24 h) Raldh1 expression in the uterine glandular epithelium. We conclude that the uterine RA concentrations are regulated by oestrogens via an effect on the expression of the Raldh synthesising enzymes. Such a regulation is consistent with the natural fluctuations of Raldh expression during the oestrous cycle, early pregnancy and blastocyst implantation
Y1 - 2006
ER -
TY - JOUR
A1 - John, Cedric Michael
A1 - Adatte, Thierry
A1 - Mutti, Maria
T1 - Regional trends in clay mineral fluxes to the Queensland margin and ties to middle Miocene global cooling
N2 - Three ODP sites located on the Marion Plateau, Northeast Australian margin, were investigated for clay mineral and bulk mineralogy changes through the early to middle Miocene. Kaolinite to smectite (K/S) ratios, as well as mass accumulation rates of clays, point to a marked decrease in accumulation of smectite associated with an increase in accumulation of kaolinite starting at similar to 15.6 Ma, followed by a, second increase in accumulation of kaolinite at similar to 13.2 Ma. Both of these increases are correlative to an increase in the calcite to detritus ratio. Comparison of our record with published precipitation proxies from continental Queensland indicates that increases in kaolinite did not correspond to more intense tropical-humid conditions, but instead to periods of greater aridity. Three mechanisms are explored to explain the temporal trends in clad, on the Marion Plateau: sea-level changes, changes in oceanic currents, and denudation of the Australian continent followed by reworking and eolian transport of clays. Though low mass accumulation rates of kaolinite are compatible with a possible contribution of eolian material after 14 Ma, when Australia became more arid, the lateral distribution of kaolinite along slope indicates mainly fluvial input for all clays and thus rules out this mechanism as well as oceanic current transport as the main controls behind clay accumulation on the plateau. We propose a model explaining the good correlation between long-term sea-level fall, decrease in smectite accumulation, increase in kaolinite accumulation and increase in carbonate input to the distal slope locations. We hypothesize that during low sea level and thus periods of drier continental climate in Queensland, early Miocene kaolinite-rich lacustrine deposits were being reworked, and that the progradation of the heterozoan carbonate platforms towards the basin center favored input of carbonate to the distal slope sites. The major find of our study is that increase kaolinite fluxes on the Queensland margin during the early and middle Miocene did not reflect the establishment of a tropical climate, and this stresses that care must be taken when reconstructing Australian climate based on deep-sea clay records alone.
Y1 - 2006
UR - http://www.sciencedirect.com/science/journal/00310182
U6 - https://doi.org/10.1016/j.palaeo.2005.09.010
SN - 0031-0182
ER -
TY - JOUR
A1 - Lange, Claudia
T1 - Reflexivity and intensification in Irish English and other new Englishes
JF - The Celtic Englishes IV : the interface between English and the Celtic languages ; proceedings of the fourth international colloquium on the "Celtic Englishes" held at the University of Potsdam in Golm (Germany) from 22-26 September 2004
N2 - Content: 1. Celtic Syntax in English and the European Sprachbund 2. Unpredictable Self-forms across Varieties of English 2.2. The Development of himself 2.3. Itself in Irish and Indian English 3. Concluding Remarks
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-41031
SP - 259
EP - 282
PB - Universitätsverlag Potsdam
CY - Potsdam
ER -
TY - JOUR
A1 - Riesch, Rüdiger
A1 - Schlupp, Ingo
A1 - Tobler, Michael
A1 - Plath, Martin
T1 - Reduction of the association preference for conspecifics in cave-dwelling Atlantic mollies, Poecilia mexicana
JF - Behavioral ecology and sociobiology
N2 - Cave animals are widely recognised as model organisms to study regressive evolutionary processes like the reduction of eyes. In this paper, we report on the regressive evolution of species discrimination in the cave molly, Poecilia mexicana, which, unlike other cave fishes, still has functional eyes. This allowed us to examine the response to both visual and non-visual cues involved in species discrimination. When surface-dwelling females were given a chance to associate with either a conspecific or a swordtail (Xiphophorus hellerii) female, they strongly preferred the conspecific female both when multiple cues and when solely visual cues were available to the female. No association preference was observed when only non-visual cues were provided. In contrast, cave-dwelling females showed no preference under all testing conditions, suggesting that species recognition mechanisms have been reduced. We discuss the role of species discrimination in relation to habitat differences.
KW - cave fish
KW - Poeciliidae
KW - Xiphophorus
KW - shoaling
KW - species recognition
Y1 - 2006
U6 - https://doi.org/10.1007/s00265-006-0223-z
SN - 0340-5443
VL - 60
SP - 794
EP - 802
PB - Springer
CY - New York
ER -
TY - JOUR
A1 - Kreft, Oliver
A1 - Georgieva, Radostina
A1 - Bäumler, Hans
A1 - Steup, Martin
A1 - Müller-Röber, Bernd
A1 - Sukhorukov, Gleb B.
A1 - Möhwald, Helmuth
T1 - Red blood cell templated polyelectrolyte capsules : a novel vehicle for the stable encapsulation of DNA and proteins
N2 - A novel method for the encapsulation of biomacromolecules, such as nucleic acids and proteins, into polyelectrolyte microcapsules is described. Fluorescence-labelled double-stranded DNA and human serum albumin (HSA) are used as model substances for encapsulation in hollow microcapsules templated on human erythrocytes. The encapsulation procedure involves an intermediate drying C, step. The accumulation of DNA and HSA in the capsules is observed by confocal laser scanning microscopy, UV spectroscopy, and flourimetry. The mechanism of encapsulation is discussed
Y1 - 2006
UR - http://www3.interscience.wiley.com/cgi-bin/jhome/10003270
U6 - https://doi.org/10.1002/marc.200500777
SN - 1022-1336
ER -
TY - JOUR
A1 - Assmann, Birte
A1 - Thiel, Marco
A1 - Romano, Maria Carmen
A1 - Niemitz, Carsten
T1 - Recurrence plot analyses suggest a novel reference system involved in newborn spontaneous movements
JF - Behavior research methods : a journal of the Psychonomic Society
N2 - The movements of newborns have been thoroughly studied in terms of reflexes, muscle synergies, leg coordination, and target-directed arm/hand movements. Since these approaches have concentrated mainly on separate accomplishments, there has remained a clear need for more integrated investigations. Here, we report an inquiry in which we explicitly concentrated on taking such a perspective and, additionally, were guided by the methodological concept of home base behavior, which Ilan Golard developed for studies of exploratory behavior in animals. Methods from nonlinear dynamics, such as symbolic dynamics and recurrence plot analyses of kinematic data received from audiovisual newborn recordings, yielded new insights into the spatial and temporal organization of limb movements. In the framework of home base behavior, our approach uncovered a novel reference system of spontaneous newborn movements.
Y1 - 2006
U6 - https://doi.org/10.3758/BF03192793
SN - 1554-351X
SN - 1554-3528
VL - 38
IS - 3
SP - 400
EP - 406
PB - Springer
CY - New York
ER -
TY - JOUR
A1 - Oberauer, Klaus
T1 - Reasoning with conditionals: A test of formal models of four theories
JF - Cognitive psychology
N2 - The four dominant theories of reasoning from conditionals are translated into formal models: The theory of mental models (Johnson-Laird, P. N., & Byrne, R. M. J. (2002). Conditionals: a theory of meaning, pragmatics, and inference. Psychological Review, 109, 646-678), the suppositional theory (Evans, J. S. B. T., & Over, D. E. (2004). If. Oxford: Oxford University Press), a dual-process variant of the model theory (Verschueren, N., Schaeken, W., & d'Ydewalle, G. (2005). A dual-process specification of causal conditional reasoning. Thinking & Reasoning, 11, 278-293), and the probabilistic theory (Oaksford, M., Chater, N., & Larkin, J. (2000). Probabilities and polarity biases in conditional inference. Journal of Experimental Psychology: Learning, Memory, and Cognition, 26, 883-899). The first three theories are formalized as multinomial models. The models are applied to the frequencies of patterns of acceptance or rejection across the four basic inferences modus ponens, acceptance of the consequent, denial of the antecedent, and modus tollens. Model fits are assessed for two large data sets, one representing reasoning with abstract, basic conditionals, the other reflecting reasoning with pseudo-realistic causal and non-causal conditionals. The best account of the data was provided by a modified version of the mental-model theory, augmented by directionality, and by the dual-process model.
KW - conditionals
KW - reasoning
KW - multinomial models
Y1 - 2006
U6 - https://doi.org/10.1016/j.cogpsych.2006.04.001
SN - 0010-0285
VL - 53
IS - 3
SP - 238
EP - 283
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Schatzabel, Hartmut
A1 - Meyer, S.
T1 - Reality, system, model, prediction : the modeling approach
Y1 - 2006
ER -
TY - THES
A1 - Buchholz, Henrik
T1 - Real-time visualization of 3D city models
T1 - Echtzeit-Visualisierung von 3D-Stadtmodellen
N2 - An increasing number of applications requires user interfaces that facilitate the handling of large geodata sets. Using virtual 3D city models, complex geospatial information can be communicated visually in an intuitive way. Therefore, real-time visualization of virtual 3D city models represents a key functionality for interactive exploration, presentation, analysis, and manipulation of geospatial data. This thesis concentrates on the development and implementation of concepts and techniques for real-time city model visualization. It discusses rendering algorithms as well as complementary modeling concepts and interaction techniques. Particularly, the work introduces a new real-time rendering technique to handle city models of high complexity concerning texture size and number of textures. Such models are difficult to handle by current technology, primarily due to two problems: - Limited texture memory: The amount of simultaneously usable texture data is limited by the memory of the graphics hardware. - Limited number of textures: Using several thousand different textures simultaneously causes significant performance problems due to texture switch operations during rendering. The multiresolution texture atlases approach, introduced in this thesis, overcomes both problems. During rendering, it permanently maintains a small set of textures that are sufficient for the current view and the screen resolution available. The efficiency of multiresolution texture atlases is evaluated in performance tests. To summarize, the results demonstrate that the following goals have been achieved: - Real-time rendering becomes possible for 3D scenes whose amount of texture data exceeds the main memory capacity. - Overhead due to texture switches is kept permanently low, so that the number of different textures has no significant effect on the rendering frame rate. Furthermore, this thesis introduces two new approaches for real-time city model visualization that use textures as core visualization elements: - An approach for visualization of thematic information. - An approach for illustrative visualization of 3D city models. Both techniques demonstrate that multiresolution texture atlases provide a basic functionality for the development of new applications and systems in the domain of city model visualization.
N2 - Eine zunehmende Anzahl von Anwendungen benötigt Benutzungsschnittstellen, um den Umgang mit großen Geodatenmengen zu ermöglichen. Virtuelle 3D-Stadtmodelle bieten eine Möglichkeit, komplexe raumbezogene Informationen auf intuitive Art und Weise visuell erfassbar zu machen. Echtzeit-Visualisierung virtueller Stadtmodelle bildet daher eine Grundlage für die interaktive Exploration, Präsentation, Analyse und Bearbeitung raumbezogener Daten. Diese Arbeit befasst sich mit der Entwicklung und Implementierung von Konzepten und Techniken für die Echtzeit-Visualisierung virtueller 3D-Stadtmodelle. Diese umfassen sowohl Rendering-Algorithmen als auch dazu komplementäre Modellierungskonzepte und Interaktionstechniken. Insbesondere wird in dieser Arbeit eine neue Echtzeit-Rendering-Technik für Stadtmodelle hoher Komplexität hinsichtlich Texturgröße und Texturanzahl vorgestellt. Solche Modelle sind durch die derzeit zur Verfügung stehende Technologie schwierig zu bewältigen, vor allem aus zwei Gründen: - Begrenzter Textur-Speicher: Die Menge an gleichzeitig nutzbaren Texturdaten ist beschränkt durch den Speicher der Grafik-Hardware. - Begrenzte Textur-Anzahl: Die gleichzeitige Verwendung mehrerer tausend Texturen verursacht erhebliche Performance-Probleme aufgrund von Textur-Umschaltungs-Operationen während des Renderings. Das in dieser Arbeit vorgestellte Verfahren, das Rendering mit Multiresolutions-Texturatlanten löst beide Probleme. Während der Darstellung wird dazu permanent eine kleine Textur-Menge verwaltet, die für die aktuelle Sichtperspektive und die zur Verfügung stehende Bildschirmauflösung hinreichend ist. Die Effizienz des Verfahrens wird in Performance-Tests untersucht. Die Ergebnisse zeigen, dass die folgenden Ziele erreicht werden: - Echtzeit-Darstellung wird für Modelle möglich, deren Texturdaten-Menge die Kapazität des Hauptspeichers übersteigt. - Der Overhead durch Textur-Umschaltungs-Operationen wird permanent niedrig gehalten, so dass die Anzahl der unterschiedlichen Texturen keinen wesentlichen Einfluss auf die Bildrate der Darstellung hat. Die Arbeit stellt außerdem zwei neue Ansätze zur 3D-Stadtmodell-Visualisierung vor, in denen Texturen als zentrale Visualisierungselemente eingesetzt werden: - Ein Verfahren zur Visualisierung thematischer Informationen. - Ein Verfahren zur illustrativen Visualisierung von 3D-Stadtmodellen. Beide Ansätze zeigen, dass Rendering mit Multiresolutions-Texturatlanten eine Grundlage für die Entwicklung neuer Anwendungen und Systeme im Bereich der 3D-Stadtmodell-Visualisierung bietet.
KW - Computergrafik
KW - Geovisualisierung
KW - 3D-Stadtmodelle
KW - Texturen
KW - computer graphics
KW - geovisualization
KW - 3d city models
KW - textures
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-13337
ER -
TY - JOUR
A1 - Baur, Heiner
A1 - Müller, Steffen
A1 - Hirschmüller, Anja
A1 - Huber, Georg
A1 - Mayer, Frank
T1 - Reactivity, stability, and strength performance capacity in motor sports
JF - British journal of sports medicine : the journal of sport and exercise medicine
N2 - Background: Racing drivers require multifaceted cognitive and physical abilities in a multitasking situation. A knowledge of their physical capacities may help to improve fitness and performance. Objective: To compare reaction time, stability performance capacity, and strength performance capacity of elite racing drivers with those of age-matched, physically active controls. Methods: Eight elite racing drivers and 10 physically active controls matched for age and weight were tested in a reaction and determination test requiring upper and lower extremity responses to visual and audio cues. Further tests comprised evaluation of one-leg postural stability on a two-dimensional moveable platform, measures of maximum strength performance capacity of the extensors of the leg on a leg press, and a test of force capacity of the arms in a sitting position at a steering wheel. An additional arm endurance test consisted of isometric work at the steering wheel at + 30 degrees and -30 degrees where an eccentric threshold load of 30 N.m was applied. Subjects had to hold the end positions above this threshold until exhaustion. Univariate one way analysis of variance (alpha = 0.05) including a Bonferroni adjustment was used to detect group differences between the drivers and controls. Results: The reaction time of the racing drivers was significantly faster than the controls ( p = 0.004). The following motor reaction time and reaction times in the multiple determination test did not differ between the groups. No significant differences (p> 0.05) were found for postural stability, leg extensor strength, or arm strength and endurance. Conclusions: Racing drivers have faster reaction times than age-matched physically active controls. Further development of motor sport-specific test protocols is suggested. According to the requirements of motor racing, strength and sensorimotor performance capacity can potentially be improved.
Y1 - 2006
U6 - https://doi.org/10.1136/bjsm.2006.025783
SN - 0306-3674
VL - 40
SP - 906
EP - 910
PB - BMJ Publ. Group
CY - London
ER -
TY - JOUR
A1 - Rohn, Sascha
A1 - Petzke, Klaus-Jürgen
A1 - Rawel, Harshadrai Manilal
A1 - Kroll, Jürgen
T1 - Reactions of chlorogenic acid and quercetin with a soy protein isolate - Influence on the in vivo food protein quality in rats
JF - Molecular nutrition & food research : bioactivity, chemistry, immunology, microbiology, safety, technology
N2 - Plant phenolic compounds are known to interact with proteins producing changes in the food (e.g., biological value (BV), color, taste). Therefore, the in vivo relevance, especially, of covalent phenolprotein reactions on protein quality was studied in a rat bioassay. The rats were fed protein derivatives at a 10% protein level. Soy proteins were derivatized with chlorogenic acid and quercetin (derivatization levels: 0.056 and 0.28 mmol phenolic compound/gram protein). Analysis of nitrogen in diets, urine, and fecal samples as well as the distribution of amino acids were determined. Depending on the degree of derivatization, the rats fed with soy protein derivatives showed an increased excretion of fecal and urinary nitrogen. As a result, true nitrogen digestibility, BV, and net protein utilization were adversely affected. Protein digestibility corrected amino acid score was decreased for lysine, tryptophan, and sulfur containing amino acids.
KW - amino acid score
KW - plant phenolic compounds
KW - protein derivatization
KW - protein digestibility
KW - soy protein
Y1 - 2006
U6 - https://doi.org/10.1002/mnfr.200600043
SN - 1613-4125
VL - 50
SP - 696
EP - 704
PB - Wiley
CY - Weinheim
ER -
TY - BOOK
A1 - Eckstein, Lars
T1 - Re-Membering the Black Atlantic : on the poetics and politics of literary memory
T3 - Cross cultures
Y1 - 2006
SN - 94-420-1958-1
VL - 84
PB - Rodopi
CY - Amsterdam
ER -
TY - THES
A1 - Förster, Hannah
T1 - Rationing & Bayesian expectations with application to the labour market
T1 - Rationierung und Bayesianische Erwartungen mit Anwendung auf den Arbeitsmarkt
N2 - The first goal of the present work focuses on the need for different rationing methods of the The Global Change and Financial Transition (GFT) work- ing group at the Potsdam Institute for Climate Impact Research (PIK): I provide a toolbox which contains a variety of rationing methods to be ap- plied to micro-economic disequilibrium models of the lagom model family. This toolbox consists of well known rationing methods, and of rationing methods provided specifically for lagom. To ensure an easy application the toolbox is constructed in modular fashion. The second goal of the present work is to present a micro-economic labour market where heterogenous labour suppliers experience consecu- tive job opportunities and need to decide whether to apply for employ- ment. The labour suppliers are heterogenous with respect to their qualifi- cations and their beliefs about the application behaviour of their competi- tors. They learn simultaneously – in Bayesian fashion – about their individ- ual perceived probability to obtain employment conditional on application (PPE) by observing each others’ application behaviour over a cycle of job opportunities.
N2 - In vorliegender Arbeit beschäftige ich mich mit zwei Dingen. Zum einen entwickle ich eine Modellierungstoolbox, die verschiedene Rationierungs- methoden enthält. Diese Rationierungsmethoden sind entweder aus der Literatur bekannt, oder wurden speziell für die lagom Modellfamilie ent- wickelt. Zum anderen zeige ich, dass man mit Hilfe von Rationierungsmetho- den aus der Modellierungstoolbox einen fiktiven Arbeitsmarkt modellie- ren kann. Auf diesem agieren arbeitssuchende Agenten, die heterogen im Bezug auf ihre Qualifikation und ihre Vorstellungen über das Bewerbungs- verhalten ihrer Konkurrenten sind. Sie erfahren aufeinanderfolgende Job- angebote und beobachten das Bewerbungsverhalten ihrer Konkurrenten, um in Bayesianischer Weise über ihre individuelle Wahrscheinlichkeit eine Stelle zu erhalten zu lernen.
KW - Rationierung
KW - Ungleichgewicht
KW - Bayes
KW - Interaktion
KW - Lernprozesse
KW - rationing
KW - bayesian inference
KW - learning processes
KW - disequilibrium
KW - agent interaction
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-15217
ER -
TY - JOUR
A1 - Carminati, Rémi
A1 - Greffet, Jean-Jacques
A1 - Henkel, Carsten
A1 - Vigoureux, Jean-Marie
T1 - Radiative and non-radiative decay of a single molecule close to a metallic nanoparticle
N2 - We study the spontaneous emission of a single emitter close to a metallic nanoparticle, with the aim to clarify the distance dependence of the radiative and non-radiative decay rates. We derive analytical formulas based on a dipole- dipole model, and show that the nonradiative decay rate follows a R-6 dependence at short distance, where R is the distance between the emitter and the center of the nanoparticle, as in Forster's energy transfer. The distance dependence of the radiative decay rate is more subtle. It is chiefly dominated by a R-3 dependence, a R-6 dependence being visible at plasmon resonance. The latter is a consequence of radiative damping in the effective dipole polarizability of the nanoparticle. The different distance behavior of the radiative and non-radiative decay rates implies that the apparent quantum yield always vanishes at short distance. Moreover, non-radiative decay is strongly enhanced when the emitter radiates at the plasmon-resonance frequency of the nanoparticle.
Y1 - 2006
UR - http://www.sciencedirect.com/science/journal/00304018
U6 - https://doi.org/10.1016/j.optcom.2005.12.009
SN - 0030-4018
ER -
TY - INPR
A1 - Denk, Robert
A1 - Krainer, Thomas
T1 - R-Boundedness, pseudodifferential operators, and maximal regularity for some classes of partial differential operators
N2 - It is shown that an elliptic scattering operator A on a compact manifold with boundary with operator valued coefficients in the morphisms of a bundle of Banach spaces of class (HT ) and Pisier’s property (α) has maximal regularity (up to a spectral shift), provided that the spectrum of the principal symbol of A on the scattering cotangent bundle avoids the right half-plane. This is accomplished by representing the resolvent in terms of pseudodifferential operators with R-bounded symbols, yielding by an iteration argument the R-boundedness of λ(A − λ)−1 in R(λ)≥ τ for some τ ∈ IR. To this end, elements of a symbolic and operator calculus of pseudodifferential operators with R-bounded symbols are introduced. The significance of this method for proving maximal regularity results for partial differential operators is underscored by considering also a more elementary situation of anisotropic elliptic operators on Rd with operator valued coefficients.
T3 - Preprint - (2006) 14
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-30147
ER -
TY - BOOK
A1 - Denk, Robert
A1 - Krainer, Thomas
T1 - R-Boundedness, pseudodifferential operators and maximal regularity for some classes of partial differential operators
T3 - Preprint / Universität Potsdam, Institut für Mathematik, Arbeitsgruppe Partiell
Y1 - 2006
SN - 1437-739X
PB - Univ.
CY - Potsdam
ER -
TY - BOOK
A1 - Skopeteas, Stavros
A1 - Fiedler, Ines
A1 - Hellmuth, Sam
A1 - Schwarz, Anne
A1 - Stoel, Ruben
A1 - Fanselow, Gisbert
A1 - Féry, Caroline
A1 - Krifka, Manfred
T1 - Questionnaire on information structure (OUIS): reference manual
N2 - Contents: Chapter 1. Introduction 1 Information Structure 2 Grammatical Correlates of Information Structure 3 Structure of the Questionnaire 4 Experimental Tasks 5 Technicalities 6 Archiving 7 Acknowledgments Chapter 2. General Questions 1 General Information 2 Phonology 3 Morphology and Syntax Chapter 3. Experimental tasks 1 Changes (Given/New in Intransitives and Transitives) 2 Giving (Given/New in Ditransitives) 3 Visibility (Given/New, Animacy and Type/Token Reference) 4 Locations (Given/New in Locative Expressions) 5 Sequences (Given/New/Contrast in Transitives) 6 Dynamic Localization (Given/New in Dynamic Loc. Descriptions) 7 Birthday Party (Weight and Discourse Status) 8 Static Localization (Macro-Planning and Given/New in Locatives) 9 Guiding (Presentational Utterances) 10 Event Cards (All New) 11 Anima (Focus types and Animacy) 12 Contrast (Contrast in pairing events) 13 Animal Game (Broad/Narrow Focus in NP) 14 Properties (Focus on Property and Possessor) 15 Eventives (Thetic and Categorical Utterances) 16 Tell a Story (Contrast in Text) 17 Focus Cards (Selective, Restrictive, Additive, Rejective Focus) 18 Who does What (Answers to Multiple Constituent Questions) 19 Fairy Tale (Topic and Focus in Coherent Discourse) 20 Map Task (Contrastive and Selective Focus in Spontaneous Dialogue) 21 Drama (Contrastive Focus in Argumentation) 22 Events in Places (Spatial, Temporal and Complex Topics) 23 Path Descriptions (Topic Change in Narrative) 24 Groups (Partial Topic) 25 Connections (Bridging Topic) 26 Indirect (Implicational Topic) 27 Surprises (Subject-Topic Interrelation) 28 Doing (Action Given, Action Topic) 29 Influences (Question Priming) Chapter 4. Translation tasks 1 Basic Intonational Properties 2 Focus Translation 3 Topic Translation 4 Quantifiers Chapter 5. Information structure summary survey 1 Preliminaries 2 Syntax 3 Morphology 4 Prosody 5 Summary: Information structure Chapter 6. Performance of Experimental Tasks in the Field 1 Field sessions 2 Field Session Metadata 3 Informants’ Agreement
T3 - Interdisciplinary studies on information structure : ISIS ; working papers of the SFB 632 - 4
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-12413
SN - 978-3-939469-14-8
PB - Universitätsverlag Potsdam
CY - Potsdam
ER -
TY - CHAP
A1 - Hara, Yurie
T1 - Question intonation and lexicalized bias expression
N2 - This paper examines the interaction between different utterance types and the Japanese modal particle darou, and proposes that the decision-theoretic semantics accounts for the interaction among darou, sentence types and intonation.
Y1 - 2006
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-10323
ER -
TY - THES
A1 - Cramer, Marcus
T1 - Quasi-free systems on general lattices : criticality, entanglement-area laws, and single-copy entanglement
Y1 - 2006
CY - Potsdam
ER -
TY - THES
A1 - Klamroth, Tillmann
T1 - Quantum mechanical simulations for correlated many-electron dynamics and electron induced processes at surfaces
Y1 - 2006
CY - Potsdam
ER -
TY - JOUR
A1 - Saalfrank, Peter
A1 - Nest, Mathias
A1 - Andrianov, Igor V.
A1 - Klamroth, Tillmann
A1 - Kroner, Dominic
A1 - Beyvers, Stephanie
T1 - Quantum dynamics of laser-induced desorption from metal and semiconductor surfaces, and related phenomena
N2 - Recent progress towards a quantum theory of laser-induced desorption and related phenomena is reviewed, for specific examples. These comprise the photodesorption of NO from Pt(111), the scanning tunnelling microscope and laser- induced desorption and switching of H at Si(100), and the electron stimulated desorption and dissociation of CO at Ru(0001). The theoretical methods used for nuclear dynamics range from open-system density matrix theory over nonadiabatically coupled multi-state models to electron-nuclear wavepackets. Also, aspects of time-dependent spectroscopy to probe ultrafast nonadiabatic processes at surfaces will be considered for the example of two-photon photoemission of solvated electrons in ice layers on Cu(111)
Y1 - 2006
UR - http://iopscience.iop.org/0953-8984/18/30/S05/pdf/0953-8984_18_30_S05.pdf
U6 - https://doi.org/10.1088/0953-8984/18/30/S05
SN - 1361-648X
SN - 0953-8984
VL - 18
IS - 30
SP - S1425
EP - S1459
PB - IOP Publ.
CY - Bristol
ER -
TY - JOUR
A1 - Saalfrank, Peter
T1 - Quantum dynamical approach to ultrafast molecular desorption from surfaces
JF - Chemical reviews
Y1 - 2006
U6 - https://doi.org/10.1021/cr0501691
SN - 0009-2665
SN - 1520-6890
VL - 106
IS - 10
SP - 4116
EP - 4159
PB - American Chemical Society
CY - Washington
ER -