cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Linking the fracture intensity of an in situ rock mass to block cave mine fragmentation
Creators: name: Munkhchuluun, Munkhtsolmon
Publisher: name: University of British Columbia
Year: 2017

description: Prediction of cave fragmentation has been one of the biggest concerns for caving operation, since the inadequate assessment can potentially result in loss of project value and safety. The spatial variability of the natural fracture network holds significant implications with respect to block cave mine fragmentation. In this thesis, an in situ fragmentation model is generated, based on Discrete Fracture Network (DFN) models. The volumetric fracture intensity value (P₃₂), derived from the DFN model, is used as an indicator of the rock mass’ structural character, and it provides a direct link to rock mass fragmentation. Major structures were included in the model in a deterministic manner, and the spatial variability of the fracture intensity was analyzed to derive a geostatistical model of rock mass fragmentation. The fragmentation ‘block model’ was then superimposed onto a PCBC draw schedule model, in an attempt to link fragmentation and height of draw. Poor data can potentially compromise DFN analysis, and may result in flawed validation and understanding. At the same time, it is important to define clear and objective methodologies, when analyzing field data, and when deriving input for DFN models. Piecewise Linear Interpolation and recreation of the conceptual DFN model are both used to study the influence of fracture intensity interval length and role of human uncertainty, on the final DFN-derived 3D spatial model. The results show that interval lengths are related to a resolution that can be effectively used in large-scale 3D continuum models, to represent the Representative Elementary Volume (REV) for the rock mass. A digital image processing technique is applied in order to assess caved ore fragmentation. Validation of this method has been gained from the study of lab experiments. Furthermore, a conversion factor for relating 1D image-based measurement to 3D objects is calculated, since the DFN-based in situ fragmentation model yields volumetric size distribution, whereas image processing techniques yield equivalent spherical diameters. Finally, by using the above-mentioned input data analyses, this thesis investigates the possible links between natural fragmentation, secondary fragmentation, height of draw, and observed over-sized material and hang-up.
Portals, platforms, and participation: building online collaboration around GLAM collections
Creators: name: Sherratt, Tim
Publisher: name: Zenodo
Year: 2022

description: Back in 2013, I was the manager of Trove at the National Library of Australia. I was asked to give a conference paper about Trove for a conference in New Zealand, and I chose for my topic ‘From portals to platforms: building new frameworks for user engagement’. I was interested in the way that Trove, and similar projects in New Zealand, the US, and Europe, were moving beyond websites to share their data directly through APIs (Application Programming Interfaces). By using these APIs people could create their own tools and interfaces, their own Troves. This was part of a shift from portal to platform – from a place to visit, to a place to create, build, and share. David Weinberger, writing about the role of libraries, argued that ‘a platform gains value the less can be predicted about what will be built with it’. I thought it might be interesting today to revisit the promise of platforms, and think some more about ways that the collections of galleries, libraries, archives and museums (the GLAM sector) can become spaces for online creativity and participation.
Reputational Herding in Financial Markets: A Laboratory Experiment
Creators: name: Roider, Andreas
name: Voskort, Andrea
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: reputation, herding, imitation, financial markets, experiment
subject: 330 Wirtschaft
subject: C91
subject: D8
subject: G14

description: We study reputational herding in Önancial markets in a laboratory experiment. In the spirit of Dasgupta and Prat (2008), career concerns are introduced in a sequential asset market, where wages for investors are set by subjects in the role of employers. Employers can observe investment behavior, but not investorsíability types. Thereby, reputational incentives may arise endogenously. We Önd that a sizeable fraction of investors follows an established trend even in a setting where there are no reputational incentives. In a setting where there are reputational concerns, they do not seem to create substantial herd behavior.
Stochastic equations, flows and measure-valued processes
Creators: name: Dawson, Donald A.
name: Li, Zenghu
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We first prove some general results on pathwise uniqueness, comparison property and existence of nonnegative strong solutions of stochastic equations driven by white noises and Poisson random measures. The results are then used to prove the strong existence of two classes of stochastic flows associated with coalescents with multiple collisions, that is, generalized Fleming--Viot flows and flows of continuous-state branching processes with immigration. One of them unifies the different treatments of three kinds of flows in Bertoin and Le Gall [Ann. Inst. H. Poincaré Probab. Statist. 41 (2005) 307--333]. Two scaling limit theorems for the generalized Fleming--Viot flows are proved, which lead to sub-critical branching immigration superprocesses. From those theorems we derive easily a generalization of the limit theorem for finite point motions of the flows in Bertoin and Le Gall [Illinois J. Math. 50 (2006) 147--181].
description: Published in at http://dx.doi.org/10.1214/10-AOP629 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Phase-conjugation of the isolated optical vortex using a flat surfaces
Creators: name: Okulov, A. Yu.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: The robust method for obtaining the helical interference pattern due to the phase-conjugation of an isolated optical vortex by means of the non-holographic technique is proposed. It is shown that a perfect wavefront-reversal of the vortex in a linear polarization state via even number of reflections is achievable due to the turn of the photon's momentum $\vec p \approx \hbar \vec k$ with respect to the photon's orbital angular momentum projection $L_z$. The possible experimental realization is based upon $catseye-prism$ like reflections inside the confocal optical $loop$ cavity. The alternative scheme contains the Dove prism embedded in the optical $loop$ with the odd number of reflections from mirrors. This $confocal$ interferometric technique is applicable to the optical tweezers, atomic traps, Sagnac laser loops and metamaterials fabrication.
description: 4 pages, 3 figures, submitted to referred journal
Karoubi's relative Chern character, the rigid syntomic regulator, and the Bloch-Kato exponential map
Creators: name: Tamme, Georg
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: 510 Mathematik

description: We construct a variant of Karoubi’s relative Chern character for smooth separated schemes over the ring of integers in a p-adic field, and prove a comparison with the rigid syntomic regulator. For smooth projective schemes, we further relate the relative Chern character to the étale p-adic regulator via the Bloch–Kato exponential map. This reproves a result of Huber and Kings for the spectrum of the ring of integers, and generalizes it to all smooth projective schemes as above.
Conformal blocks and rational normal curves
Creators: name: Giansiracusa, Noah
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H10 (Primary) 14C05, 14E30 (Secondary)

description: We prove that the Chow quotient parametrizing configurations of n points in $\mathbb{P}^d$ which generically lie on a rational normal curve is isomorphic to $\overline{M}_{0,n}$, generalizing the well-known $d = 1$ result of Kapranov. In particular, $\overline{M}_{0,n}$ admits birational morphisms to all the corresponding geometric invariant theory (GIT) quotients. For symmetric linearizations the polarization on each GIT quotient pulls back to a divisor that spans the same extremal ray in the symmetric nef cone of $\overline{M}_{0,n}$ as a conformal blocks line bundle. A symmetry in conformal blocks implies a duality of point-configurations that comes from Gale duality and generalizes a result of Goppa in algebraic coding theory. In a suitable sense, $\overline{M}_{0,2m}$ is fixed pointwise by the Gale transform when $d=m-1$ so stable curves correspond to self-associated configurations.
description: 17 pages, 1 figure; published version
Neuropeptide S alters anxiety, but not depression-like behaviour in Flinders Sensitive Line rats: a genetic animal model of depression
Creators: name: Wegener, G.
name: Finger, B.
name: Elfving, B.
name: Keller, K.
name: Liebenberg, N.
name: Fischer, C. W.
name: Singewald, N.
name: Slattery, David A.
name: Neumann, Inga D.
name: Mathé, A. A.
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: Animal model, anxiety, gene expression, depression, NPS
subject: 570 Biowissenschaften, Biologie
subject: 590 Tiere (Zoologie)

description: Neuropeptide S (NPS) and its receptor (NPSR) have been implicated in the mediation of anxiolytic-like behaviour in rodents. However, little knowledge is available regarding the NPS system in depression-related behaviours, and whether NPS also exerts anxiolytic effects in an animal model of psychopathology. Therefore, the aim of this work was to characterize the effects of NPS on depression- and anxiety-related parameters, using male and female rats in a well-validated animal model of depression: the Flinders Sensitive Line (FSL), their controls, the Flinders Resistant Line (FRL), and Sprague–Dawley (SD) rats. We found that FSL showed greater immobility in the forced swim test (FST) than FRL, confirming their phenotype. However, NPS did not affect depression-related behaviour in any rat line. No significant differences in baseline anxiety levels between the FSL and FRL strains were observed, but FSL and FRL rats displayed less anxiety-like behaviour compared to SD rats. NPS decreased anxiety-like behaviour on the elevated plus-maze in all strains. The expression of the NPSR in the amygdala, periventricular hypothalamic nucleus, and hippocampus was equal in all male strains, although a trend towards reduced expression within the amygdala was observed in FSL rats compared to SD rats. In conclusion, NPS had a marked anxiolytic effect in FSL, FRL and SD rats, but did not modify the depression-related behaviour in any strain, in spite of the significant differences in innate level between the strains. These findings suggest that NPS specifically modifies anxiety behaviour but cannot overcome/reverse a genetically mediated depression phenotype.
Investigating completeness and consistency of links between issues and commits
Creators: name: Thompson, Casey Albert
Publisher: name: University of British Columbia
Year: 2017

description: Software developers use commits to track source code changes made to a project, and to allow multiple developers to make changes simultaneously. To ensure that the commits can be traced to the issues that describe the work to be performed, developers typically add the identifier of the issue to the commit message to link commits to issues. However, developers are not infallible and not all desirable links are captured manually. To help find and improve links that have been manually specified, several techniques have been created. Although many software engineering tools, like defect predictors, depend on the links between commits and issues, there is currently no way to assess the quality of existing links. To provide a means of assessing the quality of links, I propose two quality attributes: completeness and consistency. Completeness measures whether all appropriate commits link to an issue, and consistency measures whether commits are linked to the most specific issue. I applied these quality attributes to assess a number of existing link techniques and found that existing techniques to link commits to issues lack both completeness and consistency in the links that they created. To enable researchers to better assess their techniques, I built a dataset that improves the link data for two open source projects. In addition, I provide an analysis of information in issue repositories in the form of relationships between issues that might help improve existing link augmentation techniques.
POLYVARIATIVITY OF RIGHTS IN THE STRUCTURE OF CORPORATE LEGAL RELATIONS
Creators: name: Kostruba, Anatoliy
Publisher: name: figshare
Year: 2022
Subjects: subject: 180121 Legal Practice, Lawyering and the Legal Profession
subject: FOS: Law
subject: Law
subject: 180199 Law not elsewhere classified
subject: 180105 Commercial and Contract Law
subject: 189999 Law and Legal Studies not elsewhere classified
subject: 180109 Corporations and Associations Law
subject: 180119 Law and Society

description: The article is the study of the structure of corporate legal relations, the establishment of a mechanism for their formation. Legal relations as a form of social relations are in constant development. As a result, there is emergence and development of new types of social interaction, which require an appropriate legal form of their ordering. Such ordering is self-regulated by the participants of the respective relations as a result of the subjective accumulation of property, non-property, organizational, other components. The organizational component of corporate relations is to order the activities of individuals in the process of combining their efforts at the stage of emergence of such legal relations, as well to order the activities of parties in corporate relations in the process of their realization. The property nature of corporate legal relations consists in the conditionality by the material interest in an objectified form of its participants’ aspiration to obtain the corresponding materialized effective satisfaction from the participation in them.
The cylindrical contact homology of universally tight sutured contact solid tori
Creators: name: Golovko, Roman
Publisher: name: arXiv
Year: 2010
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: We calculate the sutured version of cylindrical contact homology of a sutured contact solid torus $(S^1\times D^2,Γ, ξ)$, where $Γ$ consists of $2n$ parallel sutures of arbitrary slope and $ξ$ is a universally tight contact structure. In particular, we show that it is non-zero. This computation is one of the first computations of the sutured version of cylindrical contact homology and does not follow from computations in the closed case.
description: 19 pages, 3 figures, the signs of the Conley-Zehnder indices have been corrected. This paper can be seen as an extension of work in arXiv:0911.0055. It has been accepted for publication in the Pacific Journal of Mathematics
Scaling theory of continuum dislocation dynamics in three dimensions: Self-organized fractal pattern formation
Creators: name: Chen, Yong S.
name: Choi, Woosong
name: Papanikolaou, Stefanos
name: Bierbaum, Matthew
name: Sethna, James P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We focus on mesoscopic dislocation patterning via a continuum dislocation dynamics theory (CDD) in three dimensions (3D). We study three distinct physically motivated dynamics which consistently lead to fractal formation in 3D with rather similar morphologies, and therefore we suggest that this is a general feature of the 3D collective behavior of geometrically necessary dislocation (GND) ensembles. The striking self-similar features are measured in terms of correlation functions of physical observables, such as the GND density, the plastic distortion, and the crystalline orientation. Remarkably, all these correlation functions exhibit spatial power-law behaviors, sharing a single underlying universal critical exponent for each type of dynamics.
description: 42 pages, 19 figures, 3 tables
Linguistic Representations of Motion Do Not Depend on the Visual Motion System
Creators: name: Pavan, Andrea
name: Baggio, Giosuè
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: language, vision
subject: 150 Psychologie

description: Embodied semantics proposes that constructing the meaning of motion verb phrases relies on representations of motion in sensory cortex. However, the data reported by earlier studies as evidence for this claim are also explained by a symbolic-semantics view proposing interactions between dissociable systems. In the experiments reported here, participants were visually adapted to real and implied leftward or rightward motion, which produced a motion aftereffect opposite to the direction of the adapting stimulus. Participants then decided whether a directionally ambiguous or a leftward- or rightward-directional verb phrase implied leftward or rightward motion. Because the visual system is engaged in the motion aftereffect, embodied semantics predicts that responses in the motion-aftereffect direction (opposite to the direction of the adapting stimulus) are facilitated, whereas symbolic semantics predicts response facilitation in the direction of the adapting stimulus (opposite to the direction of the motion aftereffect). We found response facilitation in the direction of real- and implied-motion adapting stimuli in ambiguous and directional verb phrases. These results suggest that visual and linguistic representations of motion can be dissociated.
Recent applications of intramolecular Diels-Alder reaction in total synthesis of natural products
Creators: name: Mommahed Heravi, Majid
name: Fathi Vavsari, Vaezeh
Publisher: name: figshare
Year: 2022
Subjects: subject: 30303 Optical Properties of Materials
subject: FOS: Chemical sciences
subject: 30302 Nanochemistry and Supramolecular Chemistry
subject: 30701 Quantum Chemistry
subject: 39904 Organometallic Chemistry
subject: 60105 Cell Neurochemistry
subject: FOS: Biological sciences
subject: Organic Chemistry
subject: 30502 Natural Products Chemistry
subject: 30599 Organic Chemistry not elsewhere classified
subject: 30704 Statistical Mechanics in Chemistry
subject: 30205 Non-metal Chemistry
subject: Nuclear Chemistry
subject: 30504 Organic Green Chemistry

description: Diels-Alder (D-A) reaction is undoubtedly the most powerful [4 + 2] cycloaddition reaction in organic synthesis. It has been always considered as a model and a symbol of cycloaddition reactions. Intramolecular D-A reactions (IMDA) are also well recognized and can be employed in one or more steps for the total synthesis of several natural products. In this report, we wish to highlight the recent applications of IMDA as a key step in the total synthesis of biologically active natural products, including alkaloids and terpenes.
Thompson's group F is not SCY
Creators: name: Friedl, Stefan
name: Vidussi, S.
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: Thompson's group, symplectic 4-manifolds
subject: 510 Mathematik

description: In this note we prove that Thompson's group F cannot be the fundamental group of a symplectic 4-manifold with canonical class K=0∈H2(M) by showing that its Hausmann–Weinberger invariant q(F) is strictly positive.
Management of traditional rural biotopes in Finland - Perinnebiotooppien hoito Suomessa
Creators: name: Den Herder
name: , Michael
Publisher: name: Zenodo
Year: 2018
Subjects: wooded pastures
silvopastoralism
grazing
environmental agreement
perinnebiotooppit
luonnonlaitumet
metsälaitumet
laidunta
hakamaat
ympäristösopimukset
agrometsätalous

description: Artikkelissaan den Herder korostaa paitsi perinnebiotooppien ja luonnonlaitumien hinnoittelemattomia hyötyjä kuten kauniin ympäristön luomaa positiivista vaikutusta asukkaiden ja vieraiden hyvinvoinnille, erityisesti niitä lisäansiomahdollisuuksia, joita perinnebiotooppien hoidolla voidaan saada.
Näitä ovat esim. ekoturismi, hyvinvointipalvelut, hunajantuotanto tai laidunlihan suoramyynti.
Maalaismaisemaan kuuluvat perinnebiotoopit kuten metsälaitumet ovat lajistoltaan Pohjois-Euroopan rikkaimpia. Hoidettuina laidunnetuilla alueilla on yleensä rikkaampi lajisto kuin laiduntamattomilla ja siksi on tärkeää ylläpitää laidunnusta. Sopiva laidunnuspaine on tärkeää ja se määritellään
tapauskohtaisesti. Luonnon monimuotoisuuden ylläpitämiseksi tarvitaan sekä voimaperäisesti että
lievästi laidunnettuja alueita. Suomessa perinnebiotooppien määrä on laskenut 1800-luvulta ja arvioiden mukaan sen aikaisista perinnebiotoopeista on jäljellä enää 1 prosentti. Monet näille alueille
tyypilliset kasvi- ja eläinlajit ovat uhanalaisia. Metsälaiduntaminen oli tavallista vielä 1930-luvulla,
mutta katosi lähes kokonaan 1950-luvulla maa- ja metsätalouden muutoksien myötä.
Nykypäivän ongelmana on suomalaisten maatilojen määrän nopea lasku ja siten enää vain noin
50% jäljellä olevista perinnebiotoopeista on suunnitellun hoidon parissa. Usein koko maatilan toiminta lopetetaan tai tila luopuu karjasta siirtyen peltotiloiksi, tai karjaksi valitaan sisäkasvatukseen
sopivia lajeja. Perinnebiotooppien hoidon myötä tilat voisivat kuitenkin saada lisätuloja esim. ekoturismista, hyvinvointipalveluista, villien marjojen ja sienien kasvatuksesta, hunajantuotannosta, bioenergiatuotannosta tai laidunlihan suoramyynnistä.
Harmonic Maaß-Jacobi forms of degree 1 with higher rank indices
Creators: name: Conley, Charles H.
name: Raum, Martin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Number Theory (math.NT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 11F50, 17B10, 22E47

description: We define and investigate real analytic weak Jacobi forms of degree 1 and arbitrary rank. En route we calculate the Casimir operator associated to the maximal central extension of the real Jacobi group, which for rank exceeding 1 is of order 4. In ranks exceeding 1, the notions of H-harmonicity and semi-holomorphicity are the same.
description: 28 pages
Understanding the aesthetics and materiality of Ver Sacrum, the seminal magazine of the Vienna Secession.
Creators: name: Laszlo, Rita K.
Publisher: name: University of British Columbia
Year: 2017

description: Abstract The following Master’s thesis discusses the cultural-political agenda, the artistic standpoints, and the materiality of the Vienna Secessionist magazine, Ver Sacrum (1898-1903). Special attention is given to the composition of the pages, text, and the surrounding illustrations. Despite resembling the prevailing notion of Gesamtkunstwerk, its publishing has less to do with a total work of art and more with a total artistic sensibility. This sensibility is formed by the magazine’s purpose as a promotional magazine of artists campaigning for social, cultural, and political recognition and influence. A critical reading of the magazine’s first volume provides the basic understanding of this artistic sensibility, or Kunstempfinden, a recurring and leading concept throughout the issues. Kunstempfinden, also suggesting a focus on the creation of individual attitudes and meanings in relation to the arts, unites aesthetics and materiality and serves as a political tactic of the Secessionists. Thus, aesthetics and the work of art itselfare understated to the extent that they are there to mediate a prescribed meaning or sensibility. Namely, the magazine devoted itself to a cultural mission of dictating how art, culture, the Secessionist artist, or the Viennese individual should be perceived by society. In these respects, the issues of the magazine exhibit a manifesto, a provocative proclamation expressed in evocative language and metaphors, and a vision of alternative aesthetics to social life. Indeed, many of the texts project a Lukacsian definition of an aesthetic culture: a new sensibility, the occasion of a new mood as part of a new break away from the ordinary. The appearance of technological reproductions around and prior to 1900, as Walter Benjamin points out, shaped the perception of the arts also in the realization of the magazine. The emotional appeals in Ver Sacrum substitute the expected aura in a work of art and shift the traditional relevance of aesthetics to a material culture of aesthetic sensibilities. Since the Vienna Secession establishes Kunstempfinden as an artistic practice, process, and event, sensibility (Empfinden) itself appears as a defining telos of modernity and proves to be a persistent leitmotif for the Vienna Secession in communicating their perceived artistic importance.
Deliverable: Report on the current technical elements of data analysis at each partner site (4.1)
Creators: name: Fangohr, Hans
name: Galal, Kareem
name: Hall, Jamie
name: Kluyver, Thomas
name: Reis, Carlos
name: Rosca, Robert
name: Turner, William
name: Vincent, Thomas
Publisher: name: Zenodo
Year: 2019
Subjects: PaNOSC
Survey
Scientific data IT

description: This document presents the results of a survey on: scientists and scientific nature of data, tools/services for data analysis and reduction, IT infrastructure and technologies, security aspects and other information at each PaNOSC facility.
Multipartite entanglement and high precision metrology
Creators: name: Toth, Geza
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present several entanglement criteria in terms of the quantum Fisher information that help to relate various forms of multipartite entanglement to the sensitivity of phase estimation. We show that genuine multipartite entanglement is necessary to reach the maximum sensitivity in some very general metrological tasks using a two-arm linear interferometer. We also show that it is needed to reach the maximum average sensitivity in a certain combination of such metrological tasks.
description: 10 pages including 3 figures, revtex4; v3: typos corrected, published version. An independent work by Philipp Hyllus and coworkers on the same subject can be found in Phys. Rev. A 85, 022321 (2012). See http://link.aps.org/doi/10.1103/PhysRevA.85.022321 or http://arxiv.org/abs/1006.4366
Recent advances in application of amino acids: Key building blocks in design and syntheses of heterocyclic compounds
Creators: name: Mommahed Heravi, Majid
name: Vavsari, Vaezeh Fathi
Publisher: name: figshare
Year: 2022
Subjects: subject: 30302 Nanochemistry and Supramolecular Chemistry
subject: FOS: Chemical sciences
subject: 30701 Quantum Chemistry
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: Amino acids (AAs) are usually considered as important scaffolds for peptides and proteins. However, in the past decades, they have been extensively used as important synthons for the syntheses of a variety of heterocyclic systems, especially for those in which one particular stereoisomer should be obtained via asymmetric synthesis. Although the applications of AAs as synthons in heterocyclization were extensively reviewed in 1995, numerous recent reports concerning their use for the construction of a wide variety of differently sized heterocycles make the subject worthwhile of update.
Deficits in fine motor skills and their influence on persistence among gifted elementary school pupils
Creators: name: Stöger, Heidrun
name: Ziegler, Albert
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Underachievement, fine motor skills
subject: 370 Erziehung, Schul- und Bildungswesen

description: This article addresses the causes of underachievement in scholastic education. Whereas many studies have been able to show that motivational deficits provide an explanation for underachievement, little research has yet explored the possible influences of deficits in fine motor skills. The aim of our empirical study was, therefore, to investigate the influence of fine motor skills and how they may affect underachievement. We hypothesized that deficits in fine motor skills could possibly be mediated by persistence. The participants in this investigation were 53 gifted fourth-grade pupils (15 underachievers, 38 achievers) attending primary schools in Germany. In fact, underachievers and achievers could be differentiated on the basis of their fine motor skills and persistence levels. The differences attributed to persistence decreased when fine motor skills were statistically controlled.
Working Memory and Response Inhibition as One Integral Phenotype of Adult ADHD? A Behavioral and Imaging Correlational Investigation
Creators: name: Schecklmann, Martin
name: Ehlis, A.-C.
name: Plichta, MIchael M.
name: Dresler, T.
name: Heine, M.
name: Boreatti-Hümmer, M.
name: Romanos, M.
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: ADHD, n-back, stop signal, near-infrared spectroscopy, impulsivity
subject: 610 Medizin

description: Objective: It is an open question whether working memory (WM) and response inhibition (RI) constitute one integral phenotype in attention deficit hyperactivity disorder (ADHD). Method: The authors investigated 45 adult ADHD patients and 41 controls comparable for age, gender, intelligence, and education during a letter n-back and a stop-signal task, and measured prefrontal oxygenation by means of functional near-infrared spectroscopy. Results: The authors replicated behavioral and cortical activation deficits in patients compared with controls for both tasks and also for performance in both control conditions. In the patient group, 2-back performance was correlated with stop-signal reaction time. This correlation did not seem to be specific for WM and RI as 1-back performance was correlated with go reaction time. No significant correlations of prefrontal oxygenation between WM and RI were found. Conclusion: The authors’ findings do not support the hypothesis of WM and RI representing one integral phenotype of ADHD mediated by the prefrontal cortex.
Hidden Symmetries for Ellipsoid-Solitonic Deformations of Kerr-Sen Black Holes and Quantum Anomalies
Creators: name: Vacaru, Sergiu I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 53Z05, 53C15, 81T50, 83C10

description: We prove the existence of hidden symmetries in the general relativity theory defined by exact solutions with generic off-diagonal metrics, nonholonomic (non-integrable) constraints, and deformations of the frame and linear connection structure. A special role in characterization of such spacetimes is played by the corresponding nonholonomic generalizations of Stackel-Killing and Killing-Yano tensors. There are constructed new classes of black hole solutions and studied hidden symmetries for ellipsoidal and/or solitonic deformations of "prime" Kerr-Sen black holes into "target" off-diagonal metrics. In general, the classical conserved quantities (integrable and not-integrable) do not transfer to the quantized systems and produce quantum gravitational anomalies. We prove that such anomalies can be eliminated via corresponding nonholonomic deformations of fundamental geometric objects (connections and corresponding Riemannian and Ricci tensors) and by frame transforms.
description: latex2e, 11pt, 34 pages, the variant accepted by EPJC, with additional explanations, modifications and new references requested by referee
Well-posedness and qualitative behaviour of solutions for a two-phase Navier–Stokes-Mullins–Sekerka system
Creators: name: Abels, Helmut
name: Wilke, Mathias
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Two-phase flow, Navier–Stokes system, Free boundary problems, Mullins–Sekerka equation, convergence to equilibria
subject: 510 Mathematik

description: We consider a two-phase problem for two incompressible, viscous and immiscible fluids which are separated by a sharp interface. The problem arises as a sharp interface limit of a diffuse interface model. We present results on local existence of strong solutions and on the long-time behavior of solutions which start close to an equilibrium. To be precise, we show that as time tends to infinity, the velocity field converges to zero and the interface converges to a sphere at an exponential rate.
Simple linear compactifications of odd orthogonal groups
Creators: name: Gandini, Jacopo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 14M27

description: We classify the simple linear compactifications of SO(2r+1), namely those compactifications with a unique closed orbit which are obtained by taking the closure of the SO(2r+1)xSO(2r+1)-orbit of the identity in a projective space P(End(V)), where V is a finite dimensional rational SO(2r+1)-module.
description: v2: several simplifications, final version. To appear in J. Algebra
Proximal interphalangeal joint replacement with an unconstrained pyrocarbon prosthesis (Ascension(R)): a long-term follow-up
Creators: name: Heers, Guido
name: Springorum, Hans-Robert
name: Baier, Clemens
name: Götz, Jürgen
name: Grifka, Joachim
name: Renkawitz, Tobias
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Finger joint, prosthesis, pyrocarbon, arthritis
subject: 610 Medizin

description: There have been limited publications that report long-term outcomes of pyrocarbon implants. This report describes both clinical and radiographic long-term results for patients who have been treated with pyrocarbon proximal interphalangeal implants. Thirteen implants in ten patients are reported for an average follow-up of 8.3 years (range 6.2–9.3). All patients were suffering from degenerative joint disease. Five of the 13 digits were free of pain, the remaining eight digits had mild to moderate pain (visual analogue scale 2–5). The average active range of motion was 58° (SD 19°) at latest examination. X-ray results were unremarkable in six digits with an acceptable position of the prosthesis. However, in seven patients significant radiolucent lines (≥ 1 mm) were observed. Three prostheses demonstrated a migration of the proximal component, and one a subsidence of the distal component. Our study does not support the use of this implant for treatment of osteoarthritis of the finger joint owing to high complication rates and limited range of motion.
Effectiveness of antibacterial copper additives in silicone implants
Creators: name: Gosau, Martin
name: Bürgers, Ralf
name: Vollkommer, Tobias
name: Holzmann, Thomas
name: Prantl, Lukas
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Silicone implants, copper additives, Staphyolcoccus epidermidis, implant infection, capsular contracture, antibacterial effect
subject: 610 Medizin

description: Staphylococcus epidermidis plays a major role in capsular contractures of silicone breast implants. This in vitro study evaluates the antibacterial effect of copper on S. epidermidis in silicone implants. Specimens of a silicone material used for breast augmentation (Cu0) and specimens coated with different copper concentrations (Cu1, Cu2) were artificially aged. Surface roughness and surface free energy were assessed. The specimens were incubated in an S. epidermidis suspension. We assessed the quantification and the viability of adhering bacteria by live/dead cell labeling with fluorescence microscopy. Additionally, inhibition of bacterial growth was evaluated by agar diffusion, broth culture, and quantitative culture of surface bacteria. No significant differences in surface roughness and surface free energy were found between Cu0, Cu1 and Cu2. Aging did not change surface characteristics and the extent of bacterial adhesion. Fluorescence microscopy showed that the quantity of bacteria on Cu0 was significantly higher than that on Cu1 and Cu2. The ratio of dead to total adhering bacteria was significantly lower on Cu0 than on Cu1 and Cu2, and tended to be higher for Cu2 than for Cu1. Quantitative culture showed equal trends. Copper additives seem to have anti-adherence and bactericidal effects on S. epidermidis in vitro.
An Economical and Green Synthesis of Spiro[diindeno [1,2-b:2,1-e]pyridine-11,3-indoline]-trione Derivatives through Multi-Component Reaction by Br¢nsted Acidic Ionic Liquid Catalyst
Creators: name: Mommahed Heravi, Majid
name: TEYMURI, Zeinab
name: Karimi, Narges
name: Beheshtiha, Seyeed Yahya Shirazi
name: TAVAKOLI, Niloofar
Publisher: name: figshare
Year: 2022
Subjects: subject: 30302 Nanochemistry and Supramolecular Chemistry
subject: FOS: Chemical sciences
subject: 30701 Quantum Chemistry
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: Computational Chemistry
subject: Nuclear Chemistry
subject: 30504 Organic Green Chemistry
subject: 30303 Optical Properties of Materials

description: Synthesis of spiro[diindenopyridine-indoline]-triones by one-pot condensation of 1,3-indandione, isatin and aniline by Brønsted acid ionic liquid (BAIL),1-(4-sulfonicacid)butyl-3-methylimidazolium hydrogen sulfate ([(CH2)4SO3HMIM][HSO4]), as reusable and an economical catalyst in water under reflux condition.
Scattering theory of topological insulators and superconductors
Creators: name: Fulga, I. C.
name: Hassler, F.
name: Akhmerov, A. R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The topological invariant of a topological insulator (or superconductor) is given by the number of symmetry-protected edge states present at the Fermi level. Despite this fact, established expressions for the topological invariant require knowledge of all states below the Fermi energy. Here, we propose a way to calculate the topological invariant employing solely its scattering matrix at the Fermi level without knowledge of the full spectrum. Since the approach based on scattering matrices requires much less information than the Hamiltonian-based approaches (surface versus bulk), it is numerically more efficient. In particular, is better-suited for studying disordered systems. Moreover, it directly connects the topological invariant to transport properties potentially providing a new way to probe topological phases.
description: 11 pages, 7 figures, 1 table, 3 ancilla videos. v2: updated figures and references. v3: added appendix (published version). v4: fixed typos, updated references
On the Viability of Group Lending when Microfinance Meets the Market: A Reconsideration of the Besley--Coate Model
Creators: name: Arnold, Lutz G.
name: Reeder, Johannes
name: Steger, Susanne
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Microfinance, group lending, enforcement, social capital, social sanctions
subject: 330 Wirtschaft
subject: G21

description: Besley and Coate (1995) analyse the impact of joint liability and social sanctions on repayment rates when repayment enforcement is imperfect. Motivated by the microfinance industry’s move towards markets, we conduct an equilibrium analysis of the Besley–Coate model. We find that individual loan contracts may be used in market equilibrium, even though group lending entails the higher repayment rate and the lower break-even interest rate. This is because group lending causes potentially large deadweight losses. The market equilibrium is possibly characterised by financial fragility, redlining or rationing. Cooperation between borrowers and social sanctions imposed on each other in the case of strategic default turn group lending into the equilibrium mode of finance and ameliorate the market failures.
The role of hospital toilets in microbial dissemination and the effectiveness of ultraviolet C irradiation
Creators: name: Cooper, Jesse
Publisher: name: University of British Columbia
Year: 2017

description: Introduction: Healthcare-associated infections are a significant public health burden, which affect thousands of Canadians and cost millions of dollars, annually. Flushing toilets can generate pathogen-containing droplets and aerosols, and are a unique challenge in controlling pathogen transmission in healthcare facilities and other settings. This research assessed microbial dissemination of a) bacteria and b) virus from a flushing toilet in a patient area at Vancouver General Hospital. This project also c) evaluated the effectiveness of a permanently installed, automated ultraviolet C (UVC) device for reducing bacterial concentrations in air and on two surfaces in a shared patient bathroom at Lions Gate Hospital. Methods: a) Gram negative Escherichia coli and Gram positive Enterococcus faecalis, were used to simulate human stool during flushing events and viable air samples were collected with the Duo Surface Air System 360 sampler at multiple locations and time points post-flushing. b) A norovirus surrogate, MS2 bacteriophage, was also used to assess potential aerosolization of norovirus during flushing. c) Airborne and surface bacterial concentrations were compared in a bathroom with UVC and a comparable control bathroom. Results: a) Gram negative E. coli concentrations exceeded E. faecalis immediately post-flush at the location closest to the source, but decreased rapidly at successive time points and further sampling locations. In contrast, the Gram positive E. faecalis persisted significantly longer, and sampling location had no effect on its concentrations. b) Airborne phage was detected at concentrations far above the infectious dose for norovirus of 18 virions, and infectious phage particles were still present up to 60-minutes post-flushing. c) Airborne and surface bacterial concentrations were significantly reduced in the bathroom with UVC, compared to a comparable control bathroom. Conclusion: This work was the first study to evaluate both a Gram negative and Gram positive organism in the toilet plume, and show significantly longer persistence of the Gram positive bacteria. This research also showed that flushing toilets may generate airborne norovirus at concentrations capable of causing infection. Lastly, this work showed that optimized UVC is an effective adjunct to manual cleaning and infection control efforts in bathrooms.
Exceptional collections on toric Fano threefolds and birational geometry
Creators: name: Uehara, Hokuto
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14E05, 14F05, 14J45

description: Bernardi and Tirabassi show the existence of full strong exceptional collections consisting of line bundles on smooth toric Fano $3$-folds under assuming Bondal's conjecture, which states that the Frobenius push-forward of the structure sheaf $\mc O_X$ generates the derived category $D^b(X)$ for smooth projective toric varieties $X$. In this article, we show Bondal's conjecture for smooth toric Fano $3$-folds and also improve their result, using birational geometry.
description: 6 figures
Die Umweltverbandsklage nach dem Regierungsentwurf zur Anpassung des UmwRG an europa- und völkerrechtliche Vorgaben
Creators: name: Michl, Fabian
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: Umweltrecht; Europarecht; Völkerrecht
subject: 340 Recht

description: Die gesetzliche Regelung der Umweltverbandsklage sieht sich nicht zuletzt seit den Empfehlungen des Aarhus Convention Compliance Committee (ACCC) vom 20.12.2013 – bestätigt durch die 5. Vertragsstaatenkonferenz am 2.7.2014 – und dem Urteil des EuGH im Vertragsverletzungsverfahren gegen Deutschland vom 15.10.2015 erheblichem Anpassungsdruck aus dem Völker- und Europarecht ausgesetzt. Am 22.6.2016 hat die Bundesregierung einen Gesetzentwurf beschlossen, mit dem die völker- und europarechtlichen Vorgaben eins zu eins in das deutsche Recht umgesetzt werden sollen. Der Beitrag erläutert und bewertet die wesentlichen Änderungen, die der Gesetzentwurf im Recht der Umweltverbandsklage vorsieht.
Groups not presentable by products
Creators: name: Kotschick, D.
name: Löh, Clara
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Asymptotic properties of groups, groups presentable by products
subject: 510 Mathematik

description: In this paper we study obstructions to presentability by products for finitely generated groups. Along the way we develop both the concept of acentral subgroups, and the relations between presentability by products on the one hand, and certain geometric and measure or orbit equivalence invariants of groups on the other. This leads to many new examples of groups not presentable by products, including all groups with infinitely many ends, the (outer) automorphism groups of free groups, Thompson’s groups, and even some elementary amenable groups.
Risk Attitudes and Birth Order
Creators: name: Krause, Philipp
name: Heindl, Johannes
name: Jung, Andreas
name: Langguth, Berthold
name: Hajak, Göran
name: Sand, Philipp G.
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: birth order, extreme sports, personality, risk perception, risk-taking
subject: 610 Medizin

description: Risk attitudes play important roles in health behavior and everyday decision making. It is unclear, however, whether these attitudes can be predicted from birth order. We investigated 200 mostly male volunteers from two distinct settings. After correcting for multiple comparisons, for the number of siblings and for confounding by gender, ordinal position predicted perception of health-related risks among participants in extreme sports (p < .01). However, the direction of the effect contradicted Adlerian theory. Except for alcohol consumption, these findings extended to self-reported risk behavior. Together, the data call for a cautious stand on the impact of birth order on risk attitudes.
A vanishing theorem for twisted Alexander polynomials with applications to symplectic 4-manifolds
Creators: name: Friedl, Stefan
name: Vidussi, S.
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: twisted Alexander polynomials, fibered 3-manifolds, symplectic 4-manifolds
subject: 510 Mathematik

description: In this paper we show that given any 3-manifold N and any non-fibered class in H1(N;Z) there exists a representation such that the corresponding twisted Alexander polynomial is zero. We obtain this result by extending earlier work of ours and by combining this with recent results of Agol and Wise on separability of 3-manifold groups. This result allows us to completely classify symplectic 4-manifolds with a free circle action, and to determine their symplectic cones.