cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modélisation et manipulation de données historisées et archivées dans un entrepôt orienté objet
Creators: name: Ravat, Franck
name: Teste, Olivier
Publisher: name: arXiv
Year: 2010
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: This paper deals with temporal and archive object-oriented data warehouse modelling and querying. In a first step, we define a data model describing warehouses as central repositories of complex and temporal data extracted from one information source. The model is based on the concepts of warehouse object and environment. A warehouse object is composed of one current state, several past states (modelling value changes) and several archive states (summarising some value changes). An environment defines temporal parts in a warehouse schema according to a relevant granularity (attribute, class or graph). In a second step, we provide a query algebra dedicated to data warehouses. This algebra, which is based on common object algebras, integrates temporal operators and operators for querying object states. An other important contribution concerns dedicated operators allowing users to transform warehouse objects in temporal series as well as operators facilitating analytical treatments.
Quantum-Hall quantum bits
Creators: name: Yang, S.-R. Eric
name: Schliemann, John
name: MacDonald, A. H.
Publisher: name: Universität Regensburg
Year: 2002
Subjects: subject: 530 Physik

description: Bilayer quantum-Hall systems can form collective states in which electrons exhibit spontaneous interlayer phase coherence. We discuss the possibility of using bilayer quantum dot many-electron states with this property to create two-level systems that have potential advantages as quantum bits.
Quantum correlations in two-fermion systems
Creators: name: Schliemann, John
name: Cirac, J. Ignacio
name: Kus, Marek
name: Lewenstein, Maciej
name: Loss, Daniel
Publisher: name: Universität Regensburg
Year: 2001
Subjects: subject: 530 Physik

description: We characterize and classify quantum correlations in two-fermion systems having 2K single-particle states. For pure states we introduce the Slater decomposition and rank (in analogy to Schmidt decomposition and rank); i.e., we decompose the state into a combination of elementary Slater determinants formed by pairs of mutually orthogonal single-particle states. Mixed states can be characterized by their Slater number which is the minimal Slater rank required to generate them. For K=2 we give a necessary and sufficient condition for a state to have a Slater number 1. We introduce a correlation measure for mixed states which can be evaluated analytically for K=2. For higher K, we provide a method of constructing and optimizing Slater number witnesses, i.e., operators that detect Slater numbers for some states.
Synchronous rectification for LLC resonant converter in battery charging application
Creators: name: Amiri, Peyman
Publisher: name: University of British Columbia
Year: 2017

description: Everyday the number of devices with a battery inside is increasing. From smartphones to electric vehicles, batteries are widely used in different power ratings. Charging time is one of the major obstacles in widespread use of battery powered electric vehicles. Developing high power chargers is one of the key steps to achieve fast charging. Developing high power chargers requires design of compact and high efficiency converters. LLC Resonant converter is widely used in the structure of medium to high power chargers. Utilizing synchronous rectification technique, along with the converter intrinsic soft switching characteristic, has led to above 95% efficiency for LLC resonant converter. Due to presence of magnetizing inductance in the structure of resonant tank in LLC resonant converter, the secondary side currents are not completely synchronous with the primary side gate signals. This makes the control of secondary MOSFETs complicated. Although synchronous rectification for LLC resonant converter has been the focus of research for at least a decade, most of the methods developed for synchronous rectification focus on fixed output voltage applications. However, in battery charging process, the output voltage of the converter varies in a wide range. As a result, new flexible synchronous rectification methods are needed to work in different operating points during the charging process. In this research, the requirements for LLC resonant converter in battery charging application are investigated. Based on these requirements, an LLC converter with 24V rated output voltage and maximum 650W output power is designed. Next, the control requirements for LLC resonant converter in battery charging application are explained. Additionally, the settings for an analog integrated circuit from Infineon Technologies are modified to meet the requirement for battery charging application. At the end, experimental results are presented to show the effectiveness of the control settings in different operating conditions.
Double occupancy errors in quantum computing operations: Corrections to adiabaticity
Creators: name: Requist, Ryan
name: Schliemann, John
name: Abanov, Alexander G.
name: Loss, Daniel
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik

description: We study the corrections to adiabatic dynamics of two coupled quantum dot spin qubits, each dot singly occupied with an electron, in the context of a quantum computing operation. Tunneling causes double occupancy at the conclusion of an operation and constitutes a processing error. We model the gate operation with an effective two-level system, where nonadiabatic transitions correspond to double occupancy. The model is integrable and possesses three independent parameters. We confirm the accuracy of Dykhne’s formula, a nonperturbative estimate of transitions, and discuss physically intuitive conditions for its validity. Our semiclassical results are in excellent agreement with numerical simulations of the exact time evolution. A similar approach applies to two-level systems in different contexts.
Laplacian Growth II: Saffman - Taylor Problem Without Surface Tension in Filtration Combustion: Formation of One Finger with Half of the Channel Width
Creators: name: Kupervasser, Oleg
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences
subject: 37C99

description: Filtration combustion is described by Laplacian growth without surface tension. These equations have elegant analytical solutions that replace the complex integro-differential motion equations by simple differential equations of pole motion in a complex plane. The main problem with such a solution is the existence of finite time singularities. To prevent such singularities, nonzero surface tension is usually used.However, nonzero surface tension does not exist in filtration combustion, and this destroys the analytical solutions. However, a more elegant approach exists for solving the problem. First, we can introduce a small amount of pole noise to the system. Second, for regularisation of the problem, we throw out all new poles that can produce a finite time singularity. It can be strictly proved that the asymptotic solution for such a system is a single finger. Moreover, the qualitative consideration demonstrates that a finger with 1/2 of the channel width is statistically stable. Therefore, all properties of such a solution are exactly the same as those of the solution with nonzero surface tension under numerical noise. The solution of the ST problem without surface tension is similar to the solution for the equation of cellular flames in the case of the combustion of gas mixtures.
description: 19 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:nlin/0306038
"Tragedy and glory" in the "unfortunate era" : understanding the creolization of Santo Domingo through the Boca Nigua revolt
Creators: name: Hopkins, Jonathan
Publisher: name: University of British Columbia
Year: 2017

description: This thesis examines a slave revolt that occurred at the Boca Nigua sugar plantation in Santo Domingo (today the Dominican Republic) during the fall of 1796. The Spanish colony’s population at the time were coming to terms with revolution in St. Domingue (the French territory it shared an island with) and Santo Domingo’s cession to France in 1795. I argue the slave rebels who initiated the revolt at Boca Nigua and the colonial officials responsible for subduing it were influenced by creolization. Conceptually, the process involves people from divergent geographic origins arriving to the Caribbean through mass migration, and forging local cultures through the economic and political arrangements found in the colonial world. To illustrate how the peoples of Santo Domingo creolized in the tumultuous 1790s, I utilize microhistory—a theoretical framework that stresses the benefits of a micro scale, human agency, and analysis of big historical developments from a micro perspective. I show rebel slave leaders’ decision to revolt stemmed from their creole designation and identity in the plantation’s social hierarchy. The colonial authorities responsible for quelling the conflict and bringing the offenders to justice approached the situation with the intention of assuring local creole elites order would be maintained. These findings are situated within Dominican historiography as an effort to rethink the origins of the nation and its historic link to creolization.
title: ДОКЛИНИЧЕСКИЕ ИССЛЕДОВАНИЯ ПАРАМЕТРОВ ТОКСИЧНОСТИ КОМПЛЕКСНОГО ПАТОГЕНЕТИЧЕСКОГО СРЕДСТВА ДЛЯ КОРРЕКЦИИ  МЕТАБОЛИЧЕСКОГО ДИСБАЛАНСА
Creators: name: Рогалева, Евгения Викторовна
name: Абрамов, Андрей Андреевич
name: Семененко, Марина Петровна
name: Черных, Олег Юрьевич
Publisher: name: ФГБНУ КНЦЗВ
Year: 2021

description: В статье представлены результаты исследований параметров острой и субхронической токсичности комплексного патогенетического средства. На основании проведенных опытов изучения острой токсичности разработанного лекарственного средства не удалось установить LD50 – среднесмертельную дозу, а также дозу, вызывающую симптоматику отравления, что позволило отнести его к 4-му классу опасности. Установлено, что длительное назначение средства трем группам крыс ежедневно перорально в течение 28 дней с основным рационом в дозе 0,71 г/кг, 0,355г/кг и 0,142 г/кг массы тела, не оказывает токсического влияния на клинико-физиологический статус и морфо-биохимические показатели крови, не приводит к патологическим сдвигам в организме подопытных животных.
Correlation energy, quantum phase transition, and bias potential effects in quantum Hall bilayers at ν=1
Creators: name: Schliemann, John
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 530 Physik

description: We study the correlation energy, the effective anisotropy parameter, and quantum fluctuations of the pseudospin magnetization in bilayer quantum Hall systems at total filling factor ν=1 by means of exact diagonalizations of the Hamiltonian in the spherical geometry. We compare exact-diagonalization results for the ground-state energy with finite-size Hartree-Fock values. In the ordered ground-state phase at small layer separations the Hartree-Fock data compare reasonably with the exact results. Above the critical layer separation, however, the Hartree-Fock findings still predict an increase in the ground-state energy, while the exact ground-state energy is in this regime independent of the layer separation indicating the decoupling of layers and the loss of spontaneous phase coherence between them. We also find accurate values for the pseudospin anisotropy constant, whose dependence of the layer separation provides another very clear indication for the strong interlayer correlations in the ordered phase and shows an inflection point at the phase boundary. Finally, we discuss the possibility of interlayer correlations in biased systems even above the phase boundary for the balanced case. Certain features of our data for the pseudospin anisotropy constant as well as for quantum fluctuations of the pseudospin magnetization are not inconsistent with the occurrence of this effect. However, it appears to be rather weak at least in the limit of vanishing tunneling amplitude.
title: ВЛИЯНИЕ ФЛАВОБЕТИНА НА ГИСТОЛОГИЧЕСКИЕ ИЗМЕНЕНИЯ ВНУТРЕННИХ  ОРГАНОВ КРЫС ПРИ МОДЕЛИРОВАНИИ ОБЩЕЙ ГИПЕРТЕРМИИ
Creators: name: Рудь, Екатерина Николаевна
name: Кузьминова, Елена Васильевна
name: Долгов, Евгений Петрович
Publisher: name: ФГБНУ КНЦЗВ
Year: 2021

description: Проблема сезонной гипертермии особенна актуальна для животноводческой отрасли Краснодарского края. Традиционно, в летний период предприятия несут экономические потери из-за снижения производительности и воспроизводства, увеличения смертности поголовья. Понимание механизмов патологических процессов и разработка на этой основе препаратов для увеличения адаптационного потенциала животных – путь минимизации последствий теплового стресса. В статье описан опыт по изучению фармакологической эффективности кормовой добавки флавобетин на лабораторных животных в условиях экспериментальной гипертермии. Проведенное гистологическое исследование легочной и сердечной ткани крыс, которых помещали в климаткамеру на 30 минут при температуре 41°С ежедневно в течение 5 дней, демонстрирует снижение патологических изменений в группе животных, получавших флавобетин.
Elaboration d'entrepôts de données complexes
Creators: name: Teste, Olivier
Publisher: name: arXiv
Year: 2010
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: In this paper, we study the data warehouse modelling used in decision support systems. We provide an object-oriented data warehouse model allowing data warehouse description as a central repository of relevant, complex and temporal data. Our model integrates three concepts such as warehouse object, environment and warehouse class. Each warehouse object is composed of one current state, several past states (modelling its detailed evolutions) and several archive states (modelling its evolutions within a summarised form). The environment concept defines temporal parts in the data warehouse schema with significant granularities (attribute, class, graph). Finally, we provide five functions aiming at defining the data warehouse structures and two functions allowing the warehouse class inheritance hierarchy organisation.
Combined analysis of Electroencephalography and eyetracking to create new windows into cognitive human-machine interaction
Creators: name: Wobrock, Dennis
Publisher: name: Universität Bielefeld
Year: 2022
Subjects: subject: 004

description: Since their inception, machines, computers and robots have steadily grown in complexity to solve ever more complicated problems. For these systems of ever-growing complexity to be usable by the largest number of people, they need to be made affordant through tests evaluating system interactions. These tests have however shortcomings, leaving users sometimes lost and frustrated with these systems. In this work, we improve these interface evaluation test by relying on a Brain-Computer Interface combining Electroencephalography with Eyetracking. We use this bi-modal setup to provide complementary insights about a user’s perception which can be gathered from any interaction scenario. To achieve this, we have created a set of methods which allow our system to be applicable and informative in a variety of situations. For scenario transposability we developed the Fixation-based Component Synchronization method, allowing to reestablish synchronous recordings even when markers are lacking. Using both recording modalities and the Fixation-related Potentials observable thanks to them, we propose four different methods which provide insight into how user’s perceive the considered interaction. These four methods are the General Difficulty via Eyetracking (GDET) method, the Steady Peak Property Quantification (SPPQ) method, the Segment Frequency Bands Analysis (SFBA) method and the User-dependent Potential Variation (UdPV) method. These four methods provide respectively information about difficulties relating to the explored environment as a whole, specific elements in the environment, the task with which the environment is explored and specificities about the strategy with which the user explores the environment. We discuss and test the extent of all four of these methods in a series of three laboratory studies presenting artificial and natural interaction scenarios. The three scenarios presents different tasks and levels of difficulty allowing to establish the utility of these methods and verify their transposability between situations. All proposed methods are simple to implement and offer a new way to approach the analysis of interaction, both in a design environment and as a promising way to create adaptive interfaces.
Concerning the $L^4$ norms of typical eigenfunctions on compact surfaces
Creators: name: Sogge, Christopher D.
name: Zelditch, Steve
Publisher: name: arXiv
Year: 2010
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: Primary, 35F99, Secondary 35L20, 42C99

description: Let $(M,g)$ be a two-dimensional compact boundaryless Riemannian manifold with Laplacian, $Δ_g$. If $e_λ$ are the associated eigenfunctions of $\sqrt{-Δ_g}$ so that $-Δ_g e_λ= λ^2 e_λ$, then it has been known for some time \cite{soggeest} that $\|e_λ\|_{L^4(M)}\lesssim λ^{1/8}$, assuming that $e_λ$ is normalized to have $L^2$-norm one. This result is sharp in the sense that it cannot be improved on the standard sphere because of highest weight spherical harmonics of degree $k$. On the other hand, we shall show that the average $L^4$ norm of the standard basis for the space ${\mathcal H}_k$ of spherical harmonics of degree $k$ on $S^2$ merely grows like $(\log k)^{1/4}$. We also sketch a proof that the average of $\sum_{j = 1}^{2k + 1} \|e_λ\|_{L^4}^4$ for a random orthonormal basis of ${\mathcal H}_k$ is O(1). We are not able to determine the maximum of this quantity over all orthonormal bases of ${\mathcal H}_k$ or for orthonormal bases of eigenfunctions on other Riemannian manifolds. However, under the assumption that the periodic geodesics in $(M,g)$ are of measure zero, we are able to show that for {\it any} orthonormal basis of eigenfunctions we have that $\|e_{λ_{j_k}}\|_{L^4(M)}=o(λ_{j_k}^{1/8})$ for a density one subsequence of eigenvalues $λ_{j_k}$. This assumption is generic and it is the one in the Duistermaat-Gullemin theorem \cite{dg} which gave related improvements for the error term in the sharp Weyl theorem. The proof of our result uses a recent estimate of the first author \cite{Sokakeya} that gives a necessary and sufficient condition that $\|e_λ\|_{L^4(M)}=o(λ^{1/8})$.
description: 15 pages
Subgap features due to quasiparticle tunneling in quantum dots coupled to superconducting leads
Creators: name: Pfaller, Sebastian
name: Donarini, Andrea
name: Grifoni, Milena
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 530 Physik

description: We present a microscopic theory of transport through quantum dot setups coupled to superconducting leads. We derive a master equation for the reduced density matrix to lowest order in the tunneling Hamiltonian and focus on quasiparticle tunneling. For high enough temperatures transport occurs in the subgap region due to thermally excited quasiparticles, which can be used to observe excited states of the system at low bias voltages. On the example of a double quantum dot we show how subgap transport spectroscopy can be done. Moreover, we use the single level quantum dot coupled to a normal and a superconducting lead to give a possible explanation for the subgap features observed in the experiments of Dirks, Chen, Birge, and Mason.
Nonballistic Spin-Field-Effect Transistor
Creators: name: Schliemann, John
name: Egues, J. Carlos
name: Loss, Daniel
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 530 Physik

description: We propose a spin-field-effect transistor based on spin-orbit coupling of both the Rashba and the Dresselhaus types. Different from earlier proposals, spin transport through our device is tolerant against spin-independent scattering processes. Hence the requirement of strictly ballistic transport can be relaxed. This follows from a unique interplay between the Dresselhaus and the Rashba coupling; these can be tuned to have equal strengths, leading to k-independent eigenspinors even in two dimensions. We discuss two-dimensional devices as well as quantum wires. In the latter, our setup presents strictly parabolic dispersions which avoids complications from anticrossings of different bands.
A note on inverse curvature flows in ARW spacetimes
Creators: name: Gerhardt, Claus
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We prove that the leaves of the rescaled curvature flow considered in arXiv:math/0403485 [math.DG] converge to the graph of a constant function.
description: This paper has been withdrawn because the equation (2.10) is not correct when considering an embedding x=x(t,\xi) where x^i is different from \xi^i. The paper has been withdrawn because the proof of Theorem 1.4 is false
Entanglement in SU(2)-invariant quantum spin systems
Creators: name: Schliemann, John
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 530 Physik

description: We analyze the entanglement of SU(2)-invariant density matrices of two spins S1, S2 using the Peres-Horodecki criterion. Such density matrices arise from thermal equilibrium states of isotropic-spin systems. The partial transpose of such a state has the same multiplet structure and degeneracies as the original matrix with the eigenvalue of largest multiplicity being non-negative. The case S1=S, S2=1/2 can be solved completely and is discussed in detail with respect to isotropic Heisenberg spin models. Moreover, in this case the Peres-Horodecki criterion turns out to be a sufficient condition for nonseparability. We also characterize SU(2)-invariant states of two spins of length 1.
A discussion of stock market speculation by Pierre-Joseph Proudhon
Creators: name: Juhel, Jean-Claude
name: Dufour, Dominique
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Finance (q-fin.GN)
subject: FOS: Economics and business

description: The object of this contribution is to present the ideas behind the thinking of the French economist Pierre-Joseph Proudhon (1809-1865) in relation to the causes and effects of Stock market speculation. It is based upon the works of this author but particularly on his "Manuel du spéculateur à la Bourse" (Stock Market Speculator Manual) edited in 1857 in Paris. Compared to the markets of today, however, the stock market described by Proudhon appears embryonic. Nevertheless it represents the location for transactions in financial assets, commodities, precious metals and even some transactions involving options. This contribution is organised in the following manner - the first section is devoted to the development of Proudhon's thought in relation to speculation. It is divided into two parts. The first part is dedicated to Pierre-Joseph Proudhon's definitions of stock market speculation or gambling with shares that for him served no purpose either from a human or economic perspective and was therefore condemnable and to be contrasted with entrepreneurial speculation that, even though it is a highly-risky activity, involves the spirit of enterprise and provides the lifeblood of economic growth. The second part allows us to present Pierre-Joseph Proudhon's propositions in relation to restricting the speculation that he considers obnoxious. The second section has two objectives: one part places in perspective the views of Proudhon and the characteristics of stock market activity under the Second Empire whilst the other part examines current-day aspects of the characteristics evoked by Proudhon. We are interested especially in the question of the regulation and that of the relevance today of certain accounting practices.
Topological invariants from non-restricted quantum groups
Creators: name: Geer, Nathan
name: Patureau-Mirand, Bertrand
Publisher: name: arXiv
Year: 2010
Subjects: subject: Geometric Topology (math.GT)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 57M25, 57M27, 17B37

description: We introduce the notion of a relative spherical category. We prove that such a category gives rise to the generalized Kashaev and Turaev-Viro-type 3-manifold invariants defined in arXiv:1008.3103 and arXiv:0910.1624, respectively. In this case we show that these invariants are equal and extend to what we call a relative Homotopy Quantum Field Theory which is a branch of the Topological Quantum Field Theory founded by E. Witten and M. Atiyah. Our main examples of relative spherical categories are the categories of finite dimensional weight modules over non-restricted quantum groups considered by C. De Concini, V. Kac, C. Procesi, N. Reshetikhin and M. Rosso. These categories are not semi-simple and have an infinite number of non-isomorphic irreducible modules all having vanishing quantum dimensions. We also show that these categories have associated ribbon categories which gives rise to re-normalized link invariants. In the case of sl(2) these link invariants are the Alexander-type multivariable invariants defined by Y. Akutsu, T. Deguchi, and T. Ohtsuki.
description: 37 pages, 16 figures
Floer theory for negative line bundles via Gromov-Witten invariants
Creators: name: Ritter, Alexander F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Symplectic Geometry (math.SG)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 53D45, 53D40, 14N35

description: Let M be the total space of a negative line bundle over a closed symplectic manifold. We prove that the quotient of quantum cohomology by the kernel of a power of quantum cup product by the first Chern class of the line bundle is isomorphic to symplectic cohomology. We also prove this for negative vector bundles and the top Chern class. We explicitly calculate the symplectic and quantum cohomologies of O(-n) over P^m. For n=1, M is the blow-up of C^{m+1} at the origin and symplectic cohomology has rank m. The symplectic cohomology vanishes if and only if the first Chern class of the line bundle is nilpotent in quantum cohomology. We prove a Kodaira vanishing theorem and a Serre vanishing theorem for symplectic cohomology. In general, we construct a representation of π_1(Ham(X,ω)) on the symplectic cohomology of symplectic manifolds X conical at infinity.
description: 53 pages; version 3: improved discussion of maximum principle for negative vector bundles. The final version is published in Advances in Mathematics
Prison limits : intersections of culture and imprisonment in twenty-first century Spain
Creators: name: Barnard, Sara Jenny
Publisher: name: University of British Columbia
Year: 2017

description: This thesis explores the presence of prisons in contemporary Spanish culture, investigating both their portrayal and the place of cultural projects in current and former prisons. I consider how the selected films, written texts, sites of former prisons, and performance art shape attitudes about punishment and its alternatives. The first part focuses on portrayals of the prison experience, as fictionalized on screen in Azuloscurocasinegro (Daniel Sánchez Arévalo, 2006) and Celda 211 (Daniel Monzón, 2009) and as witnessed in writing and theatre work by prisoners, through the work of Elena Cánovas and Teatro Yeses, and Andrés Rabadán’s Historias desde la cárcel (2003). The second part moves into a discussion of transformations – firstly exploring former prison sites (in Carabanchel, Segovia, and Palencia), and then considering how imprisonment is represented through performance art in the work of Abel Azcona and Marcel·lí Antúnez Roca. Through mapping the prison and its relation to contemporary Spanish cultural production, I consider how the presence and portrayal of prisons shapes perceptions and experiences of exclusion and belonging in Spain today, engaging with the wider issue of movement, immigration, and borders. Using notions of ‘borderland’ and liminality to interrogate points of encounter between prisons and culture, this project looks for ways that these intersections can offer potential for movement, dialogue, and connection.
On Selective Unboundedness of VASS
Creators: name: Demri, Stéphane
Publisher: name: arXiv
Year: 2010
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Computational Complexity (cs.CC)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Numerous properties of vector addition systems with states amount to checking the (un)boundedness of some selective feature (e.g., number of reversals, run length). Some of these features can be checked in exponential space by using Rackoff's proof or its variants, combined with Savitch's theorem. However, the question is still open for many others, e.g., reversal-boundedness. In the paper, we introduce the class of generalized unboundedness properties that can be verified in exponential space by extending Rackoff's technique, sometimes in an unorthodox way. We obtain new optimal upper bounds, for example for place-boundedness problem, reversal-boundedness detection (several variants exist), strong promptness detection problem and regularity detection. Our analysis is sufficiently refined so as we also obtain a polynomial-space bound when the dimension is fixed.
description: In Proceedings INFINITY 2010, arXiv:1010.6112
"Moral Essentialism and Generosity Among Children and Adults" Pre-Registration
Creators: name: Heiphetz, Larisa A.
Publisher: name: Columbia University
Year: 2019
Subjects: Conduct of life
Conduct of life--Psychological aspects
Generosity
Essentialism (Philosophy)
Social perception

description: Children and adults view many characteristics in an essentialist way—as innate, immutable, and biological. Prior work has typically investigated essentialism regarding broad domains (e.g., gender rather than maleness/femaleness). Using the example of morality, the current work asked whether individuals view different components of one domain (goodness/badness) differently and whether such views might influence behavior. Five- to eight-year-olds reported more essentialism than adults; however, both children and adults viewed goodness in more essentialist terms than badness. Although views of morally relevant characteristics in general did not significantly predict generosity (Study 1), essentialist views of the recipient did influence generosity (Studies 2-3). Adults shared fewer resources with bad characters who were described in essentialist versus non-essentialist terms, an effect that did not appear to be driven by demand characteristics and that persisted even when both descriptions explicitly noted that the character would always remain bad. Although adults reported less essentialism than children, essentialist descriptions appeared to influence their behaviors more. This work highlights the need to investigate essentialism regarding specific domain components (e.g., goodness/badness) in addition to the domain overall (e.g., morality), partially because essentialism impacts behavior differently across components. Findings also suggest that emphasizing situational factors contributing to wrongdoing and a transgressor’s ability to change may benefit people when they have committed moral violations.
D6.2 Integrating commercial cloud services into the European Open Science Cloud
Creators: name: Rocca, Giuseppe La
name: Jones, Bob
Publisher: name: Zenodo
Year: 2019
Subjects: HNSciCloud, EOSC, cloud,

description: The HNSciCloud hybrid cloud platform links together commercial cloud service providers and research organisations' in-house IT resources via the GEANT network and, provides innovative solutions for supporting the connection of the reseach infrastructures identified in the ESFRI Roadmap to the European Open Science Cloud (EOSC). These results provide and innovative vision of how to develop the capacity necessary to support the nascent EOSC intended to create a single digital research space for Europe's 1.8 million researchers.

The document outlines the EOSC rules of participation and technical requirements for onboarding public and commercial services and provided a list of recommendations to encourage the engagement of commercial cloud providers in the EOSC.
Radiation-enhanced self- and boron diffusion in germanium
Creators: name: Schneider, S.
name: Bracht, H.
name: Klug, J. N.
name: Lundsgaard, H.
name: Nylandsted Larsen, A.
name: Bougeard, Dominique
name: Haller, E. E.
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 530 Physik
subject: 61.72.uf
subject: 61.72.jj
subject: 66.30.H-
subject: 66.30.J-

description: We report experiments on proton radiation-enhanced self- and boron (B) diffusion in germanium (Ge) for temperatures between 515 ∘C and 720 ∘C. Modeling of the experimental diffusion profiles measured by means of secondary ion mass spectrometry is achieved on the basis of the Frenkel pair reaction and the interstitialcy and dissociative diffusion mechanisms. The numerical simulations ascertain concentrations of Ge interstitials and B-interstitial pairs that deviate by several orders of magnitude from their thermal equilibrium values. The dominance of self-interstitial related defects under irradiation leads to an enhanced self- and B diffusion in Ge. Analysis of the experimental profiles yields data for the diffusion of self-interstitials (I) and the thermal equilibrium concentration of BI pairs in Ge. The temperature dependence of these quantities provides the migration enthalpy of I and formation enthalpy of BI that are compared with recent results of atomistic calculations. The behavior of self- and B diffusion in Ge under concurrent annealing and irradiation is strongly affected by the property of the Ge surface to hinder the annihilation of self-interstitials. The limited annihilation efficiency of the Ge surface can be caused by donor-type surface states favored under vacuum annealing, but the physical origin remains unsolved.
Scaling of Geographic Space from the Perspective of City and Field Blocks and Using Volunteered Geographic Information
Creators: name: Jiang, Bin
name: Liu, Xintao
Publisher: name: arXiv
Year: 2010
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Scaling of geographic space refers to the fact that for a large geographic area its small constituents or units are much more common than the large ones. This paper develops a novel perspective to the scaling of geographic space using large street networks involving both cities and countryside. Given a street network of an entire country, we decompose the street network into individual blocks, each of which forms a minimum ring or cycle such as city blocks and field blocks. The block sizes demonstrate the scaling property, i.e., far more small blocks than large ones. Interestingly, we find that the mean of all the block sizes can easily separate between small and large blocks- a high percentage (e.g., 90%) of smaller ones and a low percentage (e.g., 10%) of larger ones. Based on this regularity, termed as the head/tail division rule, we propose an approach to delineating city boundaries by grouping the smaller blocks. The extracted city sizes for the three largest European countries (France, Germany and UK) exhibit power law distributions. We further define the concept of border number as a topological distance of a block far from the outmost border to map the center(s) of the country and the city. We draw an analogy between a country and a city (or geographic space in general) with a complex organism like the human body or the human brain to further elaborate on the power of this block perspective in reflecting the structure or patterns of geographic space. Keywords: Power law distribution, scaling of geographic space, data-intensive geospatial computing, street networks
description: 12 pages, 7 figures, and 3 tables, minor revision in text, Figure A1 added
Annotationsergonomie: Design-Empfehlungen für linguistische Annotationswerkzeuge
Creators: name: Burghardt, Manuel
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: Annotation, Usability, Digital Humanities, Korpuslinguistik
subject: 004 Informatik
subject: 020 Bibliotheks- und Informationswissenschaft

description: Dieser Beitrag skizziert die Kluft, die zwischen linguistischen Annotationswerkzeugen einerseits, und etablierten Methoden des Usability Engineering anderseits, besteht. Eine Evaluationsstudie dreier weit verbreiteter Annotationstools offenbart unterschiedliche Kategorien von Usability-Problemen, auf deren Basis eine Sammlung von 28 Design-Empfehlungen für benutzerfreundliche Annotationswerkzeuge vorgeschlagen werden.
Modeling Mortality of Related Populations via Parameter Shrinkage
Creators: name: Venter, Gary
name: Sahin, Sule
Publisher: name: Columbia University
Year: 2018
Subjects: subject: Mortality--Forecasting--Methodology
subject: Estimation theory
subject: Parameter estimation
subject: Statistics
subject: FOS: Mathematics

description: Parameter shrinkage is known to reduce fitting and prediction errors in linear models. When the variables are dummies for age, period, etc. shrinkage is more commonly applied to differences between adjacent parameters, perhaps by fitting cubic splines or piecewise-linear curves (linear splines) across the parameters. A common problem in mortality is modeling related populations where some commonality is desired. We do this by shrinking slope changes of linear splines for the largest population, then shrinking differences from those slope changes for the other populations.

There are frequentist and Bayesian approaches to shrinkage, and they have a good deal of similarity. Here we use a unified approach that compromises a bit with both of these paradigms. It uses Bayesian tools without some of the historical Bayesian concepts, and pushes the random-effects framework slightly to accommodate.

Modeling Swedish and Danish male mortality data is used as an illustration.
Dual threshold diode based on the superconductor-to-insulator transition in ultrathin TiN filmss
Creators: name: Baturina, Tatyana
name: Kalok, David
name: Bilusic, Ante
name: Vinokur, Valerii  M.
name: Baklanov, Mikhail R.
name: Gutakovskii, A. K.
name: Latyshev, A. V.
name: Strunk, Christoph
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: critical currents, diodes, superconducting junction devices, superconducting thin films, superconducting transitions, titanium compounds
subject: 530 Physik

description: We investigate transport properties of superconducting TiN films in the vicinity of the superconductor-insulator transition (SIT). We show that the current-voltage (I-V) characteristics are mirror-symmetric with respect to the SIT and can be switched to each other by the applied magnetic field. In both superconducting and insulating states, the low-temperature I-V characteristics have pronounced diode-like threshold character, demonstrating voltage/current jumps over several orders of magnitude at the corresponding critical current or threshold voltage. We have found that for both states, the theory developed for Josephson junction arrays offers a quantitative description of the experimental results.
Analyzing Settings for Social Identity Management on Social Networking Sites: Classification, Current State, and Proposed Developments
Creators: name: Riesner, Moritz
name: Netter, Michael
name: Pernul, Günther
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Social identity management; SIdM; Social Networking Sites; Online social network; Privacy; Requirements; Privacy settings
subject: 004 Informatik

description: The rising prevalence of Social Networking Sites (SNS) and their usage in multiple contexts poses new privacy challenges and increasingly prompts users to manage their online identity. To address privacy threats stemming from interacting with other users on SNS, effective Social Identity Management (SIdM) is a key requirement. It refers to the deliberate and targeted disclosure of personal attribute values to a subset of one's contacts or other users on the SNS. Protection against other entities such as the site operator itself or advertisers and application programmers is not covered by SIdM, but could be incorporated in further refinement steps. Features and settings to perform SIdM have been proposed and subsequently implemented partly by some SNS. Yet, these are often isolated solutions that lack integration into a reference framework that states the requirements for successfully managing one's identity. In this article, such a reference framework of existing and desired SIdM settings is derived from identity theory, literature analysis, and existing SNS. Based thereupon, we examine the SIdM capabilities of prevalent SNS and highlight possible improvements. Lastly, we reason about developing a metric to objectively compare the capability of SNS in regards to their support for SIdM.
Scaling properties of proton-nucleus total reaction cross sections
Creators: name: Abu-Ibrahim, Badawy
name: Kohama, Akihisa
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the scaling properties of proton-nucleus total reaction cross sections for stable nuclei and propose an approximate expression in proportion to Z^{2/3}σ_{pp}^{total} + N^{2/3} σ_{pn}^{total}. Based on this expression, we can derive a relation that enables us to predict a total reaction cross section for any stable nucleus within 10% uncertainty at most, using the empirical value of the total reaction cross section of a given nucleus.
description: 4 pages, 7 figures. To be appeared as a Brief Report in Physical Review C.
On interleaving in {P,A}-Time Petri nets with strong semantics
Creators: name: Boucheneb, Hanifa
name: Barkaoui, Kamel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: This paper deals with the reachability analysis of {P,A}-Time Petri nets ({P,A}-TPN in short) in the context of strong semantics. It investigates the convexity of the union of state classes reached by different interleavings of the same set of transitions. In BB08, the authors have considered the T-TPN model and its Contracted State Class Graph (CSCG) and shown that this union is not necessarily convex. They have however established some sufficient conditions which ensure convexity. This paper shows that for the CSCG of {P,A}-TPN, this union is convex and can be computed without computing intermediate state classes. These results allow to improve the forward reachability analysis by agglomerating, in the same state class, all state classes reached by different interleavings of the same set of transitions (abstraction by convex-union).
description: In Proceedings INFINITY 2010, arXiv:1010.6112
Construction of Complete Embedded Self-Similar Surfaces under Mean Curvature Flow. Part III
Creators: name: Nguyen, Xuan Hien
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35, 53

description: We present new examples of complete embedded self-similar surfaces under mean curvature by gluing a sphere and a plane. These surfaces have finite genus and are the first examples of self-shrinkers in $\mathbb R^3$ that are not rotationally symmetric. The strategy for the construction is to start with a family of initial surfaces by desingularizing the intersection of a sphere and a plane, then solve a perturbation problem to obtain a one parameter family of self-similar surfaces. Although we start with surfaces asymptotic to a plane at infinity, the constructed self-similar surfaces are asymptotic to cones at infinity.
description: 26 pages, typos corrected. To appear in Duke Mathematical Journal
Indian Railways Power house of India
Creators: name: Singh, Abhishek
Publisher: name: Zenodo
Year: 2019
Subjects: Renewable energy, Transport system, Hybrid transport Infrastructure

description: Indian railway is sitting on mountains of untamed energy banks. The same energy is being wasted till date and we are exploring other alternatives without exploiting which can be very easily tamed. The overall energy generating potential of Indian railway is sufficient to supply it to half of the nation that to green energy. This project comprises of three forms of green energy which can be easily tamed and will produce other useful byproducts also. Strangely these methods are very common and emphasized by the govt. also but are not implemented on the largest energy hub of the nation.
Spin and orbital mechanisms of the magnetogyrotropic photogalvanic effects in GaAs/AlxGa1-xAs quantum well structures
Creators: name: Lechner, V.
name: Golub, Leonid E.
name: Lomakina, F.
name: Bel'kov, V. V.
name: Olbrich, P.
name: Stachel, S.
name: Caspers, I.
name: Griesbeck, M.
name: Kugler, M.
name: Hirmer, M. J.
name: Korn, T.
name: Schüller, C.
name: Schuh, D.
name: Wegscheider, W.
name: Ganichev, Sergey
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 530 Physik
subject: 73.21.Fg, 72.25.Fe, 78.67.De, 73.63.Hs

description: We report on the study of the linear and circular magnetogyrotropic photogalvanic effect (MPGE) in GaAs/AlGaAs quantum well structures. Using the fact that in such structures the Landé factor g* depends on the quantum well (QW) width and has different signs for narrow and wide QWs, we succeeded to separate spin and orbital contributions to both MPGEs. Our experiments show that, for most QW widths, the MPGEs are mainly driven by spin-related mechanisms, which results in a photocurrent proportional to the g* factor. In structures with a vanishingly small g* factor, however, linear and circular MPGE are also detected, proving the existence of orbital mechanisms.
Tri-criterion inverse portfolio optimization with application to socially responsible mutual funds
Creators: name: Utz, Sebastian
name: Wimmer, Maximilian
name: Hirschberger, Markus
name: Steuer, Ralph E.
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: Socially responsible investing, Inverse optimization, Portfolio selection, Multiple criteria optimization, Nondominated surfaces, Multiple criteria decision making
subject: 330 Wirtschaft

description: We present a framework for inverse optimization in a Markowitz portfolio model that is extended to include a third criterion. The third criterion causes the traditional nondominated frontier to become a surface. Until recently, it had not been possible to compute such a surface. But by using a new method that is able to generate the nondominated surfaces of tri-criterion Portfolio selection problems, we are able to compute via inverse optimization the implied risk tolerances of given funds that pursue an additional objective beyond risk and return. In applying this capability to a broad sample of conventional and socially responsible (SR) mutual funds, we find that after the screening process there appears to be no significant difference between how assets are allocated in socially responsible and conventional mutual funds, which is a result that is likely to be different from what many SR investors would expect.
description: An earlier version of the article circulated under the title "Is socially responsible investing just screening? Evidence from mutual funds"