cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Biertrinken als partizipatorische Handlung in der zeitgenössischen Kunst unter besonderer Berücksichtigung ausgewählter Werke von Tom Marioni und Cyprien Gaillard
Creators: name: Bernard, Anell Stella
Publisher: name: Universität Paderborn
Year: 2021

description: Seitdem mit der Entdeckung der Braukunst aus einem Brotbrei das erste Bier gebraut worden ist, ist dieses alkoholische Getränk fester Bestandteil der menschlichen Kultur. Als flüssiges Relikt aus der kulturhistorischen Frühzeit steht das Bier damit in enger Verbindung zur Entwicklung der menschlichen Zivilisationsgeschichte. Doch dem Bier sowie dem Vorgang des Biertrinkens kommt nicht nur aus kulturhistorischer, gesellschaftlicher wie sozialer Perspektive eine einzigartige Bedeutung zu: Mit der Entwicklung der künstlerischen Strömung der Eat Art fand das Bier schließlich auch seinen Weg in die Kunst und ist seitdem als an sich kunstfremdes Material fest im Materialrepertoire der Gegenwartskunst verankert. Die Dissertationsschrift untersucht Bier als Material sowie das Biertrinken als partizipatorische Handlung in der zeitgenössischen Kunst. Im Fokus stehen dabei vor allem die zwei exemplarisch ausgewählten künstlerischen Arbeiten „The Act of Drinking Beer with Friends is the Highest Form of Art“ (1970-2017) von Tom Marioni und „The Recovery of Discovery“ (2011) von Cyprien Gaillard. Die Dissertationsschrift leistet damit einen Beitrag zur Kunstgeschichte (flüssiger) alimentärer Realien als Material und Gegenstand der zeitgenössischen Kunst.
description: Ever since the first beer was brewed from bread pulp with the discovery of the art of brewing, this alcoholic beverage has been an integral part of human culture. As a liquid relic of early cultural history, beer is thus closely linked to the development of human civilization. However, beer and the process of drinking beer are not only of unique importance from a cultural-historical, social and societal perspective: with the development of the artistic movement of 'Eat Art', beer finally found its way into art and has since been firmly anchored in the material repertoire of contemporary art as a material that is in itself foreign to art. The dissertation examines beer as a material and beer drinking as a participatory action in contemporary art. The main focus is on two exemplarily selected artistic works "The Act of Drinking Beer with Friends is the Highest Form of Art" (1970-2017) by Tom Marioni and "The Recovery of Discovery" (2011) by Cyprien Gaillard. The dissertation writing thus contributes to the art history of (liquid) alimentary realia as material and object of contemporary art.
Local cohomology of logarithmic forms
Creators: name: Denham, Graham
name: Schenck, Hal
name: Schulze, Mathias
name: Walther, Uli
name: Wakefield, Max
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 32S22, 52C35, 16W25

description: Let Y be a divisor on a smooth algebraic variety X. We investigate the geometry of the Jacobian scheme of Y, homological invariants derived from logarithmic differential forms along Y, and their relationship with the property that Y is a free divisor. We consider arrangements of hyperplanes as a source of examples and counterexamples. In particular, we make a complete calculation of the local cohomology of logarithmic forms of generic hyperplane arrangements.
description: 21 pages, minor corrections and updated bibliography
title: Anchored Strategic Reasoning
Creators: name: Ivanova-Stenzel, Radosveta
name: Seres, Gyula
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2022

description: Anchoring is a robust behavioral phenomenon modeled predominantly as a bias in individual judgment. We propose a game-theoretic model that considers players’ beliefs about others’ behavior as a mediator for the effect of the anchor on a player’s choice. The results establish that anchoring in strategic interactions reported in the literature can be rationalized by anchored beliefs about the opponents’ intentions. Notwithstanding, we also demonstrate that a player might adjust away from rather than toward the anchor in games where choices are strategic substitutes.
Solving real time evolution problems by constructing excitation operators
Creators: name: Wang, Pei
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this paper we study the time evolution of an observable in the interacting fermion systems driven out of equilibrium. We present a method for solving the Heisenberg equations of motion by constructing excitation operators which are defined as the operators A satisfying [H,A]=λA. It is demonstrated how an excitation operator and its excitation energy λcan be calculated. By an appropriate supposition of the form of A we turn the problem into the one of diagonalizing a series of matrices whose dimension depends linearly on the size of the system. We perform this method to calculate the evolution of the creation operator in a toy model Hamiltonian which is inspired by the Hubbard model and the nonequilibrium current through the single impurity Anderson model. This method is beyond the traditional perturbation theory in Keldysh-Green's function formalism, because the excitation energy λis modified by the interaction and it will appear in the exponent in the function of time.
description: 8 pages
The materiality of things? Bruno Latour, Charles Péguy and the history of science
Creators: name: Schmidgen, Henning
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: actor network theory, biblical exegesis, history of sociology, Bruno Latour, Charles Péguy, materialism, tradition
subject: 100 Philosophie
subject: 300 Sozialwissenschaften, Soziologie

description: This article sheds new light on Bruno Latour’s sociology of science and technology by looking at his early study of the French writer, philosopher and editor Charles Péguy (1873–1914). In the early 1970s, Latour engaged in a comparative study of Péguy’s Clio and the four gospels of the New Testament. His 1973 contribution to a Péguy colloquium (published in 1977) offers rich insights into his interest in questions of time, history, tradition and translation. Inspired by Gilles Deleuze’s philosophy of difference, Latour reads Clio as spelling out and illustrating the following argument: ‘Repetition is a machine to produce differences with identity’. However, in contrast to Deleuze’s work (together with Félix Guattari) on the materiality of machines, or assemblages [agencements], Latour emphasizes the semiotic aspects of the repetition/difference process. As in Péguy, the main model for this process is the Roman Catholic tradition of religious events. The article argues that it is this reading of Péguy and Latour’s early interest in biblical exegesis that inspired much of Latour’s later work. In Laboratory Life (Latour and Woolgar, 1979) and The Pasteurization of France (1988) in particular, problems of exegesis and tradition provide important stimuli for the analysis of scientific texts. In this context, Latour gradually transforms the question of tradition into the problem of reference. In a first step, he shifts the event that is transmitted and translated from the temporal dimension (i.e. the past) to the spatial (i.e. from one part of the laboratory to another). It is only in a second step that Latour resituates scientific events in time. As facts they are ‘constructed’ but nevertheless ‘irreducible’. They result, according to Latour, from the tradition of the future. As a consequence, the Latourian approach to science distances itself from the materialism of Deleuze and other innovative theoreticians.
The development of anxiety in children with autism spectrum disorders
Creators: name: Jitlina, Ekaterina
Publisher: name: University of British Columbia
Year: 2017

description: Although up to 40% of children with autism spectrum disorder (ASD) have a comorbid anxiety disorder, little is known about the origins and trajectory of change in anxiety symptoms in ASD. Characteristics specific to ASD such as social impairments and alexithymia may alter the experience of anxiety in this population. Consequently, anxiety may differ in the ASD population and merits focused study. This dissertation consists of two related studies that used data from the longitudinal Pathways in ASD study. The psychometric properties of the Spence Children’s Anxiety Scale – Parent Form (SCAS-P) in 238 children who were seen annually from ages 7.5 to 11 were examined in Study 1. While the original six-factor structure was not a good fit in this sample, four subscales reflecting Generalized, Separation Anxiety, Panic and Agoraphobia symptoms were identified. In Study 2, parent ratings of Generalized, Separation Anxiety, Panic and Agoraphobia symptoms were captured at snapshots in middle childhood, as well as changing over time in 262 children who were seen annually between ages 7.5 to 11. The proportion of children whose parents rated them as experiencing Elevated Generalized Anxiety was comparable to past reports, though rates of Elevated Separation Anxiety symptoms were higher than past reports. Parent-rated Generalized Anxiety, Separation Anxiety, Panic and Agoraphobia symptoms were stable over the middle childhood years, and there was little variance in the trajectories of all except the Separation Anxiety domain. Children with age-typical language abilities were rated as experiencing higher levels of Generalized and Separation Anxiety in middle childhood. Parent-rated anxiety in early childhood significantly predicted higher Generalized and Separation anxiety across middle childhood, while parental internalizing symptoms in early childhood were predictive of Generalized, but not Separation Anxiety symptoms. There were no differences in Generalized or Separation Anxiety levels across ages 7-11 between boys and girls. The results of this research offer a deeper understanding of the psychometric properties of one widely used anxiety rating scale, as well as its predictors, incidence and development over middle childhood. In turn, this understanding can support efforts aimed at preventing and treating anxiety disorders in ASD.
Differential orbifold K-theory
Creators: name: Bunke, Ulrich
name: Schick, T.
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Differential K-theory, equivariant differential K-theory, orbifold, push-forward in differential K-theory, localization in equivariant differential K-theory
subject: 510 Mathematik

description: We construct differential K-theory of representable smooth orbifolds as a ring valued functor with the usual properties of a differential extension of a cohomology theory. For proper submersions (with smooth fibres) we construct a push-forward map in differential orbifold K-theory. Finally, we construct a non-degenerate intersection pairing with values in C/Z for the subclass of smooth orbifolds which can be written as global quotients by a finite group action. We construct a real subfunctor of our theory, where the pairing restricts to a non-degenerate R/Z-valued pairing.
TRA SACRO E QUOTIDIANO. IL MONACHESIMO FEMMINILE NELLA LAGUNA DI VENEZIA IN EPOCA MEDIEVALE (SECOLI IX-XIV)
Creators: name: CARRARO, SILVIA
Publisher: name: Universit� degli Studi di Milano
Year: 2012

description: This research studies the origin and evolution of venetian female monasticism from IX to XIV centuries. Religion dynamics is the focus of this study but it examines relationships with venetian politic situation. It starts with a "large" monasticism that includes great variety of women's spiritual experiences to arrive to consider a "strict" monasticism through the analysis of istitutionalisation processes. This study considers not only Church point of view, but also women's religion vocations.
Stable cohomology of the universal Picard varieties and the extended mapping class group
Creators: name: Ebert, Johannes
name: Randal-Williams, Oscar
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Topology (math.AT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H15, 32G15, 14C22, 57R20, 55R40

description: We study the moduli spaces which classify smooth surfaces along with a complex line bundle. There are homological stability and Madsen--Weiss type results for these spaces (mostly due to Cohen and Madsen), and we discuss the cohomological calculations which may be deduced from them. We then relate these spaces to (a generalisation of) Kawazumi's extended mapping class groups, and hence deduce cohomological information about these. Finally, we relate these results to complex algebraic geometry. We construct a holomorphic stack classifying families of Riemann surfaces equipped with a fibrewise holomorphic line bundle, which is a gerbe over the universal Picard variety, and compute its holomorphic Picard group.
Reliability of different body temperature measurement sites during aortic surgery
Creators: name: Göbölös, L.
name: Ugocsai, Peter
name: Philipp, Alois
name: Foltan, Maik
name: Thrum, Andrea
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: aortic surgery; temperature monitoring; antegrade cerebral perfusion; hypothermia; circulatory arrest; tympanic; rectal; bladder
subject: 610 Medizin

description: Objective: We retrospectively performed a comparative analysis of temperature measurement sites during surgical repair of the thoracic aorta. Methods: Between January 2004 and May 2006, 22 patients (mean age: 63±12 years) underwent operations on the thoracic aorta with arterial cannulation of the aortic arch concavity and selective antegrade cerebral perfusion (ACP) during deep hypothermic circulatory arrest (HCA). Indications for surgical intervention were acute type A dissection in 14 (64%) patients, degenerative aneurysm in 6 (27%), aortic infiltration of thymic carcinoma in 1 (4.5%) and intra-aortic stent refixation in 1 (4.5%). Rectal, tympanic and bladder temperatures were evaluated to identify the best reference to arterial blood temperature during HCA and ACP. Results: There were no operative deaths and the 30-day mortality rate was 13% (three patients). Permanent neurological deficits were not observed and transient changes occurred in two patients (9%). During re-warming, there was strong correlation between tympanic and arterial blood temperatures (r= 0.9541, p<0.001), in contrast to the rectal and bladder temperature (r=0.7654, p= n.s; r=0.7939, p= n.s., respectively). Conclusion: We conclude that tympanic temperature measurements correlate with arterial blood temperature monitoring during aortic surgery with HCA and ACP and, therefore, should replace bladder and rectal measurements.
Localization from Incomplete Noisy Distance Measurements
Creators: name: Javanmard, Adel
name: Montanari, Andrea
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistics Theory (math.ST)
subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We consider the problem of positioning a cloud of points in the Euclidean space $\mathbb{R}^d$, using noisy measurements of a subset of pairwise distances. This task has applications in various areas, such as sensor network localization and reconstruction of protein conformations from NMR measurements. Also, it is closely related to dimensionality reduction problems and manifold learning, where the goal is to learn the underlying global geometry of a data set using local (or partial) metric information. Here we propose a reconstruction algorithm based on semidefinite programming. For a random geometric graph model and uniformly bounded noise, we provide a precise characterization of the algorithm's performance: In the noiseless case, we find a radius $r_0$ beyond which the algorithm reconstructs the exact positions (up to rigid transformations). In the presence of noise, we obtain upper and lower bounds on the reconstruction error that match up to a factor that depends only on the dimension $d$, and the average degree of the nodes in the graph.
description: 46 pages, 8 figures, numerical experiments added. Journal version (v1,v2: Conference versions, ISIT 2011); Journal of Foundations of Computational Mathematics, 2012
The effects of single-objective management on disturbances in central interior dry forests of British Columbia
Creators: name: Leclerc, Marc-Antoine François
Publisher: name: University of British Columbia
Year: 2017

description: Mule deer are an important game species, and have become the focus of applying a particular silvicultural treatment that enhances habitat while allowing timber harvesting. Mule deer winter range management (MDWRM) involves the proportional removal of trees based on their diameter and abundance resulting in a multilayered, Douglas-fir dominated forest with a clumpy tree distribution. I assessed changes in forest stand attributes brought about by MDWRM through time and how these attributes related to stand susceptibility to the western spruce budworm, Douglas-fir beetle, and wildfire using a randomized complete block single factor mixed-effects model with subsampling. In the short-term, MDWRM significantly changed (p<0.05) forest stand attributes by decreasing sub-canopy tree density and basal area, canopy cover, leaf area index, and increasing large surface fuel load. In the long-term, most attributes recovered to untreated levels. Relative to untreated stands, treated stands maintained a multilayered structure and an abundance of Douglas-fir trees thus their susceptibility to the western spruce budworm did not change through time. In the short-term, a reduction in mature host-tree density lowered susceptibility to the Douglas-fir beetle. With subsequent forest recovery, long-term susceptibility did not differ relative to untreated stands. In the treated stands the likelihood of crown fire was greater shortly after than longer after treatment. This was likely due to more large surface fuels immediately following treatment. In addition, I extrapolated the effects of MDWRM across eligible stands of interior British Columbia in a hypothetical simulation to evaluate the current and forecasted landscape-level fire risk. The forecasted forest under widespread application of MDWRM resulted in a homogenized landscape dominated by low fire risk. Further, widespread application of MDWRM may result in a fire resilient landscape, but with consequences for other ecological processes. The present study contributes to our understanding of the relationship between single-objective management and subsequent stand susceptibility to biotic and abiotic disturbances. I concluded that understanding this relationship should play an important role in responsible resource management.
Fast sic-mosfet switch with gate boosting technology
Creators: name: Sack, M.
name: Hochberg, M.
name: Herzog, D.
name: Mueller, G.
Publisher: name: VDE Verlag
Year: 2021

description: Gate boosting enables a considerable increase in switching speed for commercially available MOSFETs. In the present work, a switch comprising three SiC-MOSFETs in parallel configuration has been combined with a gate drive circuit employing a gate boosting technology based on a series capacitance and increased driver voltage. The gate driver uses GaN-HEMTs in a half-bridge topology. The MOSFET switch has been tested in pulsed operation with a resistive load up to 1 kV and 90 A at the load. Thereby, the capacitance and supply voltage of the gate driver have been varied. A rise time of 3.3 ns at the load has been achieved.
Sequential design of computer experiments for the estimation of a probability of failure
Creators: name: Bect, Julien
name: Ginsbourger, David
name: Li, Ling
name: Picheny, Victor
name: Vazquez, Emmanuel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computation (stat.CO)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: 62L05, 62C10, 62P30

description: This paper deals with the problem of estimating the volume of the excursion set of a function $f:\mathbb{R}^d \to \mathbb{R}$ above a given threshold, under a probability measure on $\mathbb{R}^d$ that is assumed to be known. In the industrial world, this corresponds to the problem of estimating a probability of failure of a system. When only an expensive-to-simulate model of the system is available, the budget for simulations is usually severely limited and therefore classical Monte Carlo methods ought to be avoided. One of the main contributions of this article is to derive SUR (stepwise uncertainty reduction) strategies from a Bayesian-theoretic formulation of the problem of estimating a probability of failure. These sequential strategies use a Gaussian process model of $f$ and aim at performing evaluations of $f$ as efficiently as possible to infer the value of the probability of failure. We compare these strategies to other strategies also based on a Gaussian process model for estimating a probability of failure.
description: This is an author-generated postprint version. The published version is available at http://www.springerlink.com
The virtual fibering theorem for 3-manifolds
Creators: name: Friedl, Stefan
name: Kitayama, T.
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: Fibered 3-manifolds, RFRS groups
subject: 510 Mathematik

description: In 2007 Agol showed that if N is an aspherical compact 3-manifold with empty or toroidal boundary such that π1(N) is virtually RFRS, then N is virtually fibered. We give a largely self-contained proof of Agol’s theorem using complexities of sutured manifolds.
Randomness for Free
Creators: name: Chatterjee, Krishnendu
name: Doyen, Laurent
name: Gimbert, Hugo
name: Henzinger, Thomas A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We consider two-player zero-sum games on graphs. These games can be classified on the basis of the information of the players and on the mode of interaction between them. On the basis of information the classification is as follows: (a) partial-observation (both players have partial view of the game); (b) one-sided complete-observation (one player has complete observation); and (c) complete-observation (both players have complete view of the game). On the basis of mode of interaction we have the following classification: (a) concurrent (both players interact simultaneously); and (b) turn-based (both players interact in turn). The two sources of randomness in these games are randomness in transition function and randomness in strategies. In general, randomized strategies are more powerful than deterministic strategies, and randomness in transitions gives more general classes of games. In this work we present a complete characterization for the classes of games where randomness is not helpful in: (a) the transition function probabilistic transition can be simulated by deterministic transition); and (b) strategies (pure strategies are as powerful as randomized strategies). As consequence of our characterization we obtain new undecidability results for these games.
Auxiliary Power Supply for a Semiconductor-based Marx Generator
Creators: name: Sack, Martin
name: Ruf, Johannes
name: Herzog, Dennis
name: Mueller, Georg
Publisher: name: Institute of Electrical and Electronics Engineers (IEEE)
Year: 2021

description: An auxiliary power supply for stages of a semiconductor-based Marx generator has been designed and tested. The auxiliary power supply converts the Marx generator's stage voltage ranging from 50 V to 1000 V to stabilized voltages of 7 V and 18 V at a total output power of up to 1.5 W. It comprises a transformer for insulation between input and both outputs and features a flyback converter design. The on-time of the MOSFET switch has been designed to vary between approximately 1 µs and 20 µs depending on the generator's stage voltage. The power supply has been tested successfully in an 8-stage Marx generator.
Stratified medicine in psychiatry: a worrying example or new opportunity in the treatment of anxiety?
Creators: name: Owen, D. A.
name: Rupprecht, Rainer
name: Nutt, D. J.
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Stratified medicine, translocator protein, anxiety, neurosteroids
subject: 610 Medizin

description: Stratified medicine is a new term that figures highly in current MRC and NHS strategy. It has developed from the earlier terms individualised or personalised medicine and refers to the use of genetic and/or endophenotypic measures to allow better targeting of treatments. The best exemplar is HER2 positivity in breast cancer to determine the efficacy of Herceptin. Clinical trials of this anti-cancer drug were initially unpromising, but once the HER2 positive subgroup was identified it was found, in this subgroup only, to be highly effective. It is presumed that similar subgroups will be found for many common disorders not just cancers, and that these will lead to much better targeted treatments. Such an advance may be necessary to develop new treatments in certain fields where the development of broad-spectrum/blockbuster treatments appears to have reached the end of the road; a particular example of this is in psychiatry. In this paper we discuss this issue in relation to psychiatry using a new and interesting example of how genotyping might help rescue an apparently failed novel treatment in anxiety disorders.
Ketenes as privileged synthons in the syntheses of heterocyclic compounds part 2: Five-membered heterocycles
Creators: name: Mommahed Heravi, Majid
name: Talaei, Bahareh
Publisher: name: figshare
Year: 2022
Subjects: subject: 30302 Nanochemistry and Supramolecular Chemistry
subject: FOS: Chemical sciences
subject: 39904 Organometallic Chemistry
subject: Organic Chemistry
subject: 30502 Natural Products Chemistry
subject: 30599 Organic Chemistry not elsewhere classified
subject: 30205 Non-metal Chemistry
subject: Nuclear Chemistry
subject: 30504 Organic Green Chemistry
subject: 30303 Optical Properties of Materials

description: Ketenes are mostly used as the remarkable and common starting materials for structurally diverse five-membered and fused five-membered compounds, such as lactones, furans, benzofurans, dioxolane derivatives, pyrroles, succinimide, indoles, oxindoles, isoindoles, thiophenes, oxazoles, benzoxazoles, isoxazolols, oxathiolane derivatives, thiazoles, and thiadiazoles.
Anomalous scaling in an age-dependent branching model
Creators: name: Keller-Schmidt, Stephanie
name: Tugrul, Murat
name: Eguiluz, Victor M.
name: Hernandez-Garcia, Emilio
name: Klemm, Konstantin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: We introduce a one-parametric family of tree growth models, in which branching probabilities decrease with branch age $τ$ as $τ^{-α}$. Depending on the exponent $α$, the scaling of tree depth with tree size $n$ displays a transition between the logarithmic scaling of random trees and an algebraic growth. At the transition ($α=1$) tree depth grows as $(\log n)^2$. This anomalous scaling is in good agreement with the trend observed in evolution of biological species, thus providing a theoretical support for age-dependent speciation and associating it to the occurrence of a critical point.
description: 6 pages, 3 figures. v3: published version
Scattering rigidity with trapped geodesics
Creators: name: Croke, Christopher B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We prove that the flat product metric on $D^n\times S^1$ is scattering rigid where $D^n$ is the unit ball in $\R^n$ and $n\geq 2$. The scattering data (loosely speaking) of a Riemannian manifold with boundary is map $S:U^+\partial M\to U^-\partial M$ from unit vectors $V$ at the boundary that point inward to unit vectors at the boundary that point outwards. The map (where defined) takes $V$ to $γ'_V(T_0)$ where $γ_V$ is the unit speed geodesic determined by $V$ and $T_0$ is the first positive value of $t$ (when it exists) such that $γ_V(t)$ again lies in the boundary. We show that any other Riemannian manifold $(M,\partial M,g)$ with boundary $\partial M$ isometric to $\partial(D^n\times S^1)$ and with the same scattering data must be isometric to $D^n\times S^1$. This is the first scattering rigidity result for a manifold that has a trapped geodesic. The main issue is to show that the unit vectors tangent to trapped geodesics in $(M,\partial M,g)$ have measure 0 in the unit tangent bundle.
description: 12 pages, 1 figure
Deriving an underlying mechanism for discontinuous percolation
Creators: name: Chen, Wei
name: Zheng, Zhiming
name: D'Souza, Raissa M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Understanding what types of phenomena lead to discontinuous phase transitions in the connectivity of random networks is an outstanding challenge. Here we show that a simple stochastic model of graph evolution leads to a discontinuous percolation transition and we derive the underlying mechanism responsible: growth by overtaking. Starting from a collection of $n$ isolated nodes, potential edges chosen uniformly at random from the complete graph are examined one at a time while a cap, $k$, on the maximum allowed component size is enforced. Edges whose addition would exceed $k$ can be simply rejected provided the accepted fraction of edges never becomes smaller than a function which decreases with $k$ as $g(k) = 1/2 + (2k)^{-β}$. We show that if $β< 1$ it is always possible to reject a sampled edge and the growth in the largest component is dominated by an overtaking mechanism leading to a discontinuous transition. If $β> 1$, once $k \ge n^{1/β}$, there are situations when a sampled edge must be accepted leading to direct growth dominated by stochastic fluctuations and a "weakly" discontinuous transition. We also show that the distribution of component sizes and the evolution of component sizes are distinct from those previously observed and show no finite size effects for the range of $β$ studied.
description: 6 pages. Final version appearing in EPL (2012)
On sharp interface limits for diffuse interface models for two-phase flows
Creators: name: Abels, Helmut
name: Lengeler, Daniel
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: Two-phase flow, diffuse interface model, sharp interface limit, Navier–Stokes system, free boundary problems
subject: 510 Mathematik

description: We discuss the sharp interface limit of a diffuse interface model for a two-phase flow of two partly miscible viscous Newtonian fluids of different densities, when a certain parameter ϵ>0 related to the interface thickness tends to zero. In the case that the mobility stays positive or tends to zero slower than linearly in ϵ we will prove that weak solutions tend to varifold solutions of a corresponding sharp interface model. But, if the mobility tends to zero faster than ϵ3 we will show that certain radially symmetric solutions tend to functions, which will not satisfy the Young-Laplace law at the interface in the limit.
Long-Term Trend of Indoor Volatile Organic Compounds - a 15-Year Follow-Up Considering Real Living Conditions
Creators: name: Herbarth, O.
name: Matysik, Silke
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Environmental medicine ; Hygiene; Indoor exposure; Long-term trend; VOCs
subject: 610 Medizin

description: Indoor volatile organic compounds (VOCs) may be associated with adverse health effects. The aim of this study was to investigate whether the indoor VOCs exposure burden has undergone changes during a past 15-year period, exemplarily in a German city. The study was limited to homes with families. To avoid possible regional-specific confounder effects, this assessment was conducted for this urban centre with a sufficiently long and continuous time series (1994–2008). VOCs were determined using passive sampling over 4 weeks followed by liquid extraction and analysis with gas chromatography-mass spectrometry. All measurement periods were equally distributed over the seasons and years. A substantial reduction in the total sum of VOCs and aromatics could be demonstrated as well as a trend of decrease concentrations for alkanes. No such changes could be observed for cycloalkanes, chlorinated hydrocarbons and terpenes group. Possible reasons for the reduction of indoor VOCs exposure are most likely due to the applied regulations/guidelines for the VOCs reduction in indoor-relevant products. Problems are, however, regarding the slight increase in terpene exposure. These chemicals have been found to be associated with quite specific health effects. Therefore, future emphasis should be directed not only towards the general reduction of anthropogenically generated VOC exposures in the outdoor environment but also on the reduction of health-relevant VOCs, especially indoors.
OGLE-2005-BLG-153: Microlensing Discovery and Characterization of A Very Low Mass Binary
Creators: name: Hwang, K. -H.
name: Udalski, A.
name: Han, C.
name: Ryu, Y. -H.
name: Bond, I. A.
name: Beaulieu, J. -P.
name: Dominik, M.
name: Horne, K.
name: Gould, A.
name: Gaudi, B. S.
name: Kubiak, M.
name: Szymanski, M. K.
name: Pietrzynski, G.
name: Soszynski, I.
name: Szewczyk, O.
name: Ulaczyk, K.
name: Wyrzykowski, L.
name: Abe, F.
name: Botzler, C. S.
name: Hearnshaw, J. B.
name: Itow, Y.
name: Kamiya, K.
name: Kilmartin, P. M.
name: Masuda, K.
name: Matsubara, Y.
name: Motomura, M.
name: Muraki, Y.
name: Nakamura, S.
name: Ohnishi, K.
name: Okada, C.
name: Rattenbury, N.
name: Saito, To.
name: Sako, T.
name: Sasaki, M.
name: Sullivan, D. J.
name: Sumi, T.
name: Tristram, P. J.
name: Wood, J. N.
name: Yock, P. C. M.
name: Yoshioka, T.
name: Albrow, M.
name: Bennett, D. P.
name: Bramich, D. M.
name: Brillant, S.
name: Caldwell, J. A. R.
name: Calitz, J. J.
name: Cassan, A.
name: Cook, K. H.
name: Corrales, E.
name: Coutures, C.
name: Desort, M.
name: Dieters, S.
name: Dominis, D.
name: Donatowicz, J.
name: Fouque, P.
name: Greenhill, J.
name: Harpsoe, K.
name: Hill, K.
name: Hoffman, M.
name: Jorgensen, U. G.
name: Kane, S.
name: Kubas, D.
name: Martin, R.
name: Marquette, J. -B.
name: Meintjes, P.
name: Menzies, J.
name: Pollard, K.
name: Sahu, K.
name: Steele, I.
name: Vinter, C.
name: Wambsganss, J.
name: Williams, A.
name: Woller, K.
name: Burgdorf, M.
name: Snodgrass, C.
name: Bode, M.
name: Depoy, D. L.
name: Lee, C. -U.
name: Park, B. -G.
name: Pogge, R. W.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The mass function and statistics of binaries provide important diagnostics of the star formation process. Despite this importance, the mass function at low masses remains poorly known due to observational difficulties caused by the faintness of the objects. Here we report the microlensing discovery and characterization of a binary lens composed of very low-mass stars just above the hydrogen-burning limit. From the combined measurements of the Einstein radius and microlens parallax, we measure the masses of the binary components of $0.10\pm 0.01\ M_\odot$ and $0.09\pm 0.01\ M_\odot$. This discovery demonstrates that microlensing will provide a method to measure the mass function of all Galactic populations of very low mass binaries that is independent of the biases caused by the luminosity of the population.
description: 6 pages, 3 figures, 1 table
Optimal Real-time Spectrum Sharing between Cooperative Relay and Ad-hoc Networks
Creators: name: Sun, Yin
name: Zhong, Xiaofeng
name: Chang, Tsung-Hui
name: Zhou, Shidong
name: Wang, Jing
name: Chi, Chong-Yung
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Optimization based spectrum sharing strategies have been widely studied. However, these strategies usually require a great amount of real-time computation and significant signaling delay, and thus are hard to be fulfilled in practical scenarios. This paper investigates optimal real-time spectrum sharing between a cooperative relay network (CRN) and a nearby ad-hoc network. Specifically, we optimize the spectrum access and resource allocation strategies of the CRN so that the average traffic collision time between the two networks can be minimized while maintaining a required throughput for the CRN. The development is first for a frame-level setting, and then is extended to an ergodic setting. For the latter setting, we propose an appealing optimal real-time spectrum sharing strategy via Lagrangian dual optimization. The proposed method only involves a small amount of real-time computation and negligible control delay, and thus is suitable for practical implementations. Simulation results are presented to demonstrate the efficiency of the proposed strategies.
description: One typo in the caption of Figure 5 is corrected
Acute psychiatric inpatient care: A cross-cultural comparison between two hospitals in Germany and Japan
Creators: name: Moriwaki, Kumi
name: Neuner, Tanja
name: Hübner-Liebermann, Bettina
name: Hausner, Helmut
name: Wittmann, Markus
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: Psychiatric emergency services, acute psychiatric inpatient care, cross-cultural comparison, health care quality assurance, routine data
subject: 610 Medizin

description: Background: Intercultural differences influence acute inpatient psychiatric care systems. Aims: To evaluate characteristics of acute inpatient care in a German and a Japanese hospital. Method: Based on a sample of 465 admissions to the Psychiatric State Hospital Regensburg (BKR) and 91 admissions to the Hirakawa Hospital (HH) over a six-month period in 2008, data from the psychiatric basic documentation system (BADO) were analysed with regard to socio-demographic characteristics, treatment processes and outcome indicators. Results: Schizophrenia and related psychosis was the most common diagnosis in both hospitals. Cases at the BKR were admitted more quickly after onset of the present episode. Global Assessment of Psychosocial Functioning (GAF) ratings at admission were lower at the HH. Most admissions to both hospitals received psychopharmacological treatment, but more at the HH received psychotherapy. Length of stay was significantly longer at the HH (75 days) than at the BKR (28 days). Admissions to the HH were more improved with regard to GAF and clinical global impression (CGI). Conclusions: Acute admissions in Germany provide intensive care with short hospitalization as crisis intervention. For acute admissions in Japan, comprehensive care for severe mental illness precedes emergency admissions and achieves greater improvement with longer hospitalization.
From double Lie groupoids to local Lie 2-groupoids
Creators: name: Mehta, Rajan Amit
name: Tang, Xiang
Publisher: name: arXiv
Year: 2010
Subjects: subject: Differential Geometry (math.DG)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: We apply the bar construction to the nerve of a double Lie groupoid to obtain a local Lie 2-groupoid. As an application, we recover Haefliger's fundamental groupoid from the fundamental double groupoid of a Lie groupoid. In the case of a symplectic double groupoid, we study the induced closed 2-form on the associated local Lie 2-groupoid, which leads us to propose a definition of a symplectic 2-groupoid.
description: 23 pages, a few minor changes, including a correction to Lemma 6.6
Affine spherical homogeneous spaces with good quotient by a maximal unipotent subgroup
Creators: name: Avdeev, Roman
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 14L30, 14M27, 14M17

description: For an affine spherical homogeneous space G/H of a connected semisimple algebraic group G, we consider the factorization morphism by the action on G/H of a maximal unipotent subgroup of G. We prove that this morphism is equidimensional if and only if the weight semigroup of G/H satisfies some simple condition.
description: v2: title and abstract changed; v3: 16 pages, minor corrections
Determination of tomato quality attributes using portable NIR-sensors
Creators: name: Goisser, Simon
name: Krause, Julius
name: Fernandes, Michael
name: Mempel, Heike
Publisher: name: Karlsruhe
Year: 2019

description: As part of a research project a multidisciplinary approach of different research institutes is followed to investigate the possibility of using a commercially available miniaturized NIR-sensor for the determination of tomato fruit quality parameters in postharvest. Correlation of spectra and tomato reference values of firmness, dry matter and total soluble solids showed good prediction accuracy. Additionally the decline of firmness over storage time with respect to storage temperature of tomatoes could be modelled. Therefore, the decline of firmness as an indicator for shelf-life can be predicted using this portable NIR-Sensor.
Development and evaluation of an image-free computer-assisted impingement detection technique for total hip arthroplasty
Creators: name: Renkawitz, Tobias
name: Haimerl, Martin
name: Dohmen, Lars
name: Woerner, Michael
name: Springorum, Hans-Robert
name: Sendtner, Ernst
name: Heers, Guido
name: Weber, Markus
name: Grifka, Joachim
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: Computer-assisted orthopedic surgery; minimally invasive; navigation; total hip arthroplasty; combined anteversion; femur first; imageless
subject: 610 Medizin

description: Periprosthetic or bony impingement in total hip arthroplasty (THA) has been correlated to dislocation, increased wear, reduced postoperative functionality with pain and/or decreased range of motion (ROM). We sought to study the accuracy and assess the reliability of measuring bony and periprosthetic impingement on a virtual bone model prior to the implantation of the acetabular cup with the help of image-free navigation technology in an experimental cadaver study. Impingement-free ROM measurements were recorded during minimally invasive, computer-assisted THA on 14 hips of 7 cadaveric donors. Preoperatively and postoperatively the donors were scanned using computed tomography (CT). Impingement-free ROM on three-dimensional CT-based models was then compared with corresponding, intraoperative navigation models. Bony/periprosthetic impingement can be detected with a mean accuracy limit of below 5° for motion angles, which should be reached after THA for activities of daily living with the help of image-free navigation technology.
Agricultural land preservation and urban development in the new fringe : a case study of small lot farming in Kelowna, British Columbia
Creators: name: Grifone, Edward
Publisher: name: University of British Columbia
Year: 2017

description: In 1973, the Province of British Columbia enacted the Agricultural Land Commission Act (ALC) implementing the Agricultural Land Reserve (ALR) to curb consumption of agricultural land by urban encroachment. The Central Okanagan was one of the main areas in the province where agriculture lands warranted protection. Today, the conflict between urbanization and agriculture is still simmering especially in Kelowna where 40% of the city’s land base is within the ALR. The objective of this thesis is to understand the impact of the ALR on the inner fringe where urban and agricultural uses vie for the same land base. Four research questions are posed to understand the implications of agricultural land preservation within a Kelowna: (i) Is agricultural land preservation working in the inner fringe; (ii) Is urban sprawl being avoided; (iii) Is farming being advanced in the inner fringe; and (iv) Can small lot farming play a role to help advance farming in the inner fringe? The mixed methods case study approach employs a combination of qualitative methods, including personal interviews with city planners, developers and farmers; and empirical methods including a spatial analysis of two ALR study blocks that are under pressure of urbanization. The research results suggest that land sales speculation in the inner fringe ALR continues to undermine agricultural land preservation goals. The ALR has helped avoid urbanization of inner fringe agricultural lands, however, suburban, low density residential neighbourhoods continue to grow as a result of leapfrog development, market demand, and municipal policy for low density development. Although inner fringe agricultural land is being preserved, speculative interest has had a negative effect on farming, especially in the study block adjacent to the City Core Area. Small lot farming could have a role in urban agriculture, however, the continuing concern about fragmentation impedes expansion of this industry sector. Other means to promote farming is required. More definitive agricultural land use and community planning are suggested to protect agricultural land, enhance farming and mitigate urban sprawl. Five recommendations are provided for cities to embrace agriculture not only for food security, but also to invent new urban forms.
The high-temperature expansion of the classical Ising model with S_z^2 term
Creators: name: Thomaz, M. T.
name: Rojas, O.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We derive the high-temperature expansion of the Helmholtz free energy up to the order β^{17} of the one-dimensional spin-S Ising model, with single-ion anisotropy term, in the presence of a longitudinal magnetic field. We show that the values of some thermodynamical functions for the ferromagnetic models, in the presence of a weak magnetic field, are not small corrections to their values with h=0. This model with S=3 was applied by Kishine et al. [J.-i. Kishine et al., Phys. Rev. B, 2006, 74, 224419] to analyze experimental data of the single-chain magnet [Mn (saltmen)]_2 [Ni(pac)_2 (py)_2] (PF_6)_2 for T<40 K. We show that for T<35 K the thermodynamic functions of the large-spin limit model are poor approximations to their analogous spin-3 functions.
description: 10 pages, 3 figures