cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
L’espace privé: “spazio privato” o “stanza privata”?
Creators: name: Elias, Norbert
Publisher: name: Cambio. Rivista sulle Trasformazioni Sociali
Year: 2018

description: Traduciamo qui il testo di un intervento che Elias tenne a Berlino nel Maggio 1983, in occasione del seminario intitolato À propos de l’histoire de l’espace privé, in cui Philippe Ariès svolgeva il discorso di apertura. In questo testo, Elias si confronta, ancora una volta (Elias 1982[1985]; 1985[1987]), con le idee dello storico francese. La versione in tedesco, qui tradotta, è contenuta in Gesammelte Schriften, 6, 93-108, Frankfurt am Main: Suhrkamp, 2006. Al fine di fornire informazioni più dettagliate, sono state utilizzate le note del curatore [ndc] del testo del 2013 contenuto in Collected Works, vol. 15, pp. 41-51. Desideriamo ringraziare i colleghi del Norbert Elias Stitching per il permesso di tradurre e pubblicare questo scritto.
description: Cambio. Rivista sulle Trasformazioni Sociali, Vol. 8 No. 15 (2018): Another World is Possible. Collaborate to Transform
Rough surface backscatter and statistics via extended parabolic integral equation
Creators: name: Spivack, Mark
name: Spivack, Orsola Rath
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: This paper extends the parabolic integral equation method, which is very effective for forward scattering from rough surfaces, to include backscatter. This is done by applying left-right splitting to a modified two-way governing integral operator, to express the solution as a series of Volterra operators; this series describes successively higher-order surface interactions between forward and backward going components, and allows highly efficient numerical evaluation. This and equivalent methods such as ordered multiple interactions have been developed for the full Helmholtz integral equations, but not previously applied to the parabolic Green's function. In addition, the form of this Green's function allows the mean field and autocorrelation to be found analytically to second order in surface height. These may be regarded as backscatter corrections to the standard parabolic integral equation method.
Effect of correlated hopping on thermoelectric properties: Exact solutions for the Falicov-Kimball model
Creators: name: Shvaika, A. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effect of correlated hopping on the charge and heat transport is investigated for the Falicov-Kimball model. Exact solutions for the electrical and thermal conductivities and thermoelectric power are obtained within the dynamical mean field theory. The temperature dependences of the transport coefficients are analysed for particular values of correlated hopping which correspond to the significant reconstruction of the density of states and transport function. The cases with strong enhancement of thermoelectric properties are elucidated.
description: 14 pages, 8 figures
The bottom of the lattice of BCK-varieties
Creators: name: Kowalski, Tomasz
Publisher: name: arXiv
Year: 2024
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 06F35 (Primary) 03G25 (Secondary)

description: Confirming a conjecture of Pałasiński and Wroński, we show that the bottom of the lattice of subvarieties of BCK is Y-shaped.
description: This is an inessentially altered version of the original article. English and TeX slightly improved
Top Seesaw with a Custodial Symmetry, and the 126 GeV Higgs
Creators: name: Cheng, Hsin-Chia
name: Gu, Jiayin
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The composite Higgs models based on the top seesaw mechanism commonly possess an enhanced approximate chiral symmetry, which is spontaneously broken to produce the Higgs field as the pseudo-Nambu-Goldstone bosons. The minimal model with only one extra vector-like singlet quark that mixes with the top quark can naturally give rise to a 126 GeV Higgs boson. However, without having a custodial symmetry it suffers from the weak-isospin violation constraint, which pushes the chiral symmetry breaking scale above a few TeV, causing a substantial fine-tuning for the weak scale. We consider an extension to the minimal model to incorporate the custodial symmetry by adding a vector-like electroweak doublet of quarks with hypercharge +7/6. Such a setup also protects the $Zb\bar{b}$ coupling which is another challenge for many composite Higgs models. With this addition, the chiral symmetry breaking scale can be lowered to around 1 TeV, making the theory much less fine-tuned. The Higgs is a pseudo-Nambu-Goldstone boson of the broken O(5) symmetry. For the Higgs mass to be 126 GeV, the hypercharge +7/6 quarks should be around or below the chiral symmetry breaking scale, and are likely to be the lightest new states. The 14 TeV LHC will significantly extend the search reach of these quarks. To probe the rest of the spectrum, on the other hand, would require a higher-energy future collider.
description: 35 pages, 6 figures. v2: several discussions expanded, discussion of Higgs-gluon-gluon coupling added, references added, matches published version in JHEP
Global properties of pair diffusion models
Creators: name: Glitzky, Annegret
name: Hünlich, Rolf
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Drift-diffusion systems
subject: reaction-diffusion systems
subject: heterostructures
subject: energy estimates
subject: global estimates
subject: asymptotic behaviour
subject: 35B40
subject: 35B45
subject: 35K57
subject: 35R05
subject: 78A35

description: The paper deals with global properties of pair diffusion models with non-smooth data arising in semiconductor technology. The corresponding model equations are continuity equations for mobile and immobile species coupled with a nonlinear Poisson equation. The continuity equations for the mobile species are nonlinear parabolic PDEs containing drift, diffusion and reaction terms. The corresponding equations for the immobile species are ODEs involving reaction terms only. Starting with energy estimates obtained by methods of convex analysis we establish global upper and lower bounds for solutions of the initial boundary value problem. We use Moser iteration for the diffusing species, the non-diffusing species are treated separately. Finally, we study the asymptotic behaviour of solutions.
Critical charge fluctuations in a pseudogap Anderson model
Creators: name: Chowdhury, Tathagata
name: Ingersent, Kevin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Anderson impurity model with a density of states $ρ(\varepsilon) \propto |\varepsilon|^r$ containing a power-law pseudogap centered on the Fermi energy ($\varepsilon = 0$) features for $0
description: 8 pages, 4 figures
Direct and inverse problems for diffractive structures - optimization of binary gratings
Creators: name: Elschner, Johannes
name: Hinder, Rainer
name: Schmidt, Gunther
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Diffraction by periodic structures
subject: Helmholtz equation
subject: transmission problems
subject: strongly elliptic variational formulation
subject: generalized FEM
subject: optimal design problems
subject: gradient methods
subject: 78-99
subject: 78A45
subject: 35J20
subject: 65N30
subject: 49J20

description: The goal of the project is to provide flexible analytical and numerical tools for the optimal design of binary and multilevel gratings occurring in many applications in micro-optics. The direct modeling of these diffractive elements has to rely on rigorous grating theory, which is based on Maxwell's equations. We developed efficient and accurate direct solvers using a variational approach together with a generalized finite element method which appears to be well adapted to rather general diffractive structures as well as complex materials. The optimal design problem is solved by minimization algorithms based on gradient descent and the exact calculation of gradients with respect to the geometry parameters of the grating.
ROMANIA - Migration and demographic patterns in Central-Eastern Europe
Creators: name: Styrnol, Natalia
name: Wiktor-Mach, Dobrosława
name: Sikorska, Joanna
Publisher: name: Zenodo
Year: 2023
Subjects: romania
migration
migration scenarios

description: This report is a part of deliverable “D.6.2. Report on migration and demographic patterns in the EU CEE countries and potential source countries” from the project FUME – Future Migration Scenarios for Europe (870649), financed with the Horizon 2020 programme. In particular, this country report focuses on critical analysis of migration data from Romania, and in particular - immigration data. The analysis consists of an overview of stock and flow data on migrants including such dimensions as age groups, gender, country of origin and length of residence. This report is a first step in analytical exercise which aims to determine migration potential from and to Romania and furthermore, to provide necessary data input for fine-tuning of FUME migration projection model.
 Romania has been among the largest emigration countries in southeastern Europe for the last couple of decades. Socio-economic and political transformation brought many challenges and led to a number of waves of Romanian emigrants who settled mainly in Western and Southern Europe, but also in the United States and Canada. Recent migration patterns were largely determined by the process of European integration which brought new mobility and work opportunities. According to recent official statistics, the number of emigrants since 2011 has been higher than immigrants, and is relatively stable. On the other hand, immigration to Romania is still not significant, although it is on the increase in the last couple of years. Among new trends in immigrations is the arrival of Asian workers, mainly from China or Vietnam, which is a response to a lack of workforce in Romania.
 This report presents the historical framework of migration transformation, diaspora dynamics and major national groups of immigrants and their demographic structure. It also provides critical analysis of the validity of the main statistical data sources, and draws some conclusions on migration patterns and trends in Romania.
Numerical solution of the Neumann problem for nonlinear parabolic equations by probability approach
Creators: name: Milstein, Grigori N.
name: Tretyakov, Michael V.
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Semilinear parabolic equations
subject: Neumann problem
subject: probabilistic representations for equations of mathematical physics
subject: weak approximation of solutions of stochastic differential equations in bounded domain
subject: 35K55
subject: 60H10
subject: 60H30
subject: 65M99

description: A number of new layer methods solving the Neumann problem for semilinear parabolic equations is constructed by using probabilistic representations of their solutions. The methods exploit the ideas of weak sense numerical integration of stochastic differential equations in bounded domain. In spite of the probabilistic nature these methods are nevertheless deterministic. Some convergence theorems are proved. Numerical tests are presented.
title: Film im Philosophieunterricht
Creators: name: Neyer, Nina Sophie
Year: 2021

description: Diese Arbeit setzt sich mit dem anschaulichen Philosophieren mithilfe von Filmen auseinander und möchte aufzeigen, wie wertvoll und gewinnbringend der Einsatz des Mediums Film im Philosophieunterricht sein kann. Während eine Verbindung von Film und Philosophie bereits seit dem 20. Jahrhundert durch die Beschäftigung diverser Philosoph*innen mit dem Medium und dessen philosophischer Relevanz besteht, wird von Filmen im Philosophieunterricht nur selten Gebrauch gemacht. Das liegt unter anderem daran, dass viele Lehrpersonen sich unsicher bezüglich des Lerneffekts, der didaktischen Umsetzung und der Einbettung von Filmen in philosophische Themenbereiche sind. Diese Arbeit möchte dazu beitragen, diese Lücken zu füllen, indem in einem ersten Teil theoretisch illustriert wird, wie Medien im Allgemeinen und Filme im Besonderen für das Philosophieren mit Schüler*innen nützlich sein können. Im zweiten Teil werden vier Filme vorgestellt. Der Klassiker Die zwölf Geschworenen und der Science-Fiction Film Gattaca werden im praktischen Bereich der Arbeit analysiert und auf ihren philosophischen Gehalt hin untersucht, ehe jeweils eine Unterrichtsreihe zu einem spezifischen philosophischen Themengebiet geplant und ausgearbeitet wird. Die moderneren Filme Inception und Ex Machina werden in aller Kürze vorgestellt und mit Anregungen für den Einsatz im Philosophieunterricht versehen. Die Arbeit möchte auf diesem Weg über das anschauliche Philosophieren mit Filmen aufklären und sowohl Potenziale als auch Risiken und Grenzen aufzeigen. Die konkreten Unterrichtsbeispiele sollen das filmische Philosophieren in der Praxis veranschaulichen und zu einer Verbreitung der Methode beitragen. Sowohl im theoretischen als auch im praktischen Teil zeigt die Arbeit auf, wie der Einsatz von Filmen die Schüler und Schülerinnen in ihrem Denken, Reflektieren und Philosophieren unterstützen, stimulieren und anregen kann.
Unidirectional transport in stochastic ratchets
Creators: name: Milstein, Grigori N.
name: Tretyakov, Michael V.
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Noise-driven systems
subject: Brownian ratchets
subject: boundary value problems of parabolic type
subject: 60H10
subject: 93E30

description: Constructive conditions for existence of the unidirectional transport are given for systems with state-dependent noise and for forced thermal ratchets. Using them, domains of parameters corresponding to the unidirectional transport are indicated. Some results of numerical experiments are presented.
title: Kunst als Mittel der Macht
Creators: name: Riehl, Alexandra
Year: 2021

description: Die vorliegende Arbeit will zeigen, wie Papst Alexander VII. Berninis künstlerisches Schaffen als Mittel der Macht eingesetzt hat. Der Machtverlust der Kirche im 17. Jahrhundert und die persönlich erfahrene Niederlage Papst Alexanders VII. bei den Westfälischen Friedensverhandlungen beeinflussten die Kunstpatronage des Papstes maßgeblich. Um diese These zu belegen, wird zunächst der historische Kontext ausführlich analysiert. Dabei werden sowohl die politische, wirtschaftliche und soziale Lage in Europa, als auch der Machtverlust der Kirche und der Machtgewinn Frankreichs beleuchtet. In einem nächsten Schritt werden die Leben Alexanders VII. und Berninis thematisiert und das Verhältnis zwischen Päpsten und Künstlern in der Neuzeit in seinen Grundzügen dargestellt. Anhand von sechs exemplarisch ausgewählten künstlerischen Werken Berninis soll die Auswirkung des Machtverlustes auf die Patronage Alexanders VII. aufgezeigt werden. Am eindrucksvollsten sieht man die Kompensation des Niedergangs der kirchlichen Macht am Umbau des Petersplatzes. Der Neubau der Scala Regia soll die Überlegenheit der geistlichen über die weltliche Macht demonstrieren. Im Inneren des Petersdoms verwirklichte Alexander VII. mit der Cathedra Petri den Hegemonialanspruch der Kirche und verdeutlichte mit seinem Grabmal seine Demut gleichsam wie seine Tugenden. Der Elefant mit Obelisk stellt sowohl eine Mahnung zur Spiritualität als auch eine Apotheose des Papstes dar. Das städtebauliche Programm - von dem der Palazzo Chigi ein Teil ist – zeigt, wie übergreifend Alexander VII. die Erneuerung der Stadt und die damit einhergehende Rückführung Roms und der Kirche zu alter Glorie geplant hatte. Anhand dieser Beispiele wird deutlich, in welchem Ausmaß Papst Alexander VII. die Kunst Berninis einsetzte, um dem Machtverlust der Kirche und des Papsttums entgegenzusteuern.
Modified energy-momentum conservation laws and vacuum Cherenkov radiation
Creators: name: Carmona, J. M.
name: Cortes, J. L.
name: Romeo, B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a general parametrization for the leading order terms in a momentum power expansion of a non-universal Lorentz-violating, but rotational invariant, kinematics and its implications for two-body decay thresholds. The considered framework includes not only modified dispersion relations for particles, but also modified energy-momentum conservation laws, something which goes beyond effective field theory. As a particular and relevant example, bounds on the departures from special relativistic kinematics from the non-observation of vacuum Cherenkov radiation are discussed and compared with those obtained within the effective field theory scenario.
description: 15 pages, 3 figures; some minor changes, especially an updated reference to a related work by the authors
Thermo-mechanical problems in induction heating of steel
Creators: name: Pantelyat, Michael
name: Uhle, Manfred
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: induction heating
subject: Maxwell's equations
subject: heat transfer
subject: mechanical deformations
subject: 58G11
subject: 83C50
subject: 73G25

description: We discuss a 3D model that is capable for describing mechanical deformations of steel through induction hardening processes. It consists of a reduced system of Maxwell's equations, the heat transfer equation and a system of equations describing the mechanical state of the steel workpiece. In a first step the model is applied to simulation of an axisymmetrical induction hardening device, which is a wide-spread industrial equipment. We present numerical results obtained for a steel tube hardening.
A proposal for a metaphysics of self-subsisting structures. II. Quantum physics
Creators: name: Vassallo, Antonio
name: Naranjo, Pedro
name: Koslowski, Tim
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: The paper presents an extension of the metaphysics of self-subsisting structures set out in a companion paper to the realm of non-relativistic quantum physics. The discussion is centered around a Pure Shape Dynamics model representing a relational implementation of a de Broglie-Bohm $N$-body system. An interpretation of this model in terms of self-subsisting structures is proposed and assessed against the background of the debate on the metaphysics of quantum physics, with a particular emphasis on the nature of the wave function. The analysis shows that elaborating an appropriate Leibnizian/Machian metaphysics of the quantum world requires a substantial revision of the notion of world-building relation.
description: 32 pages, forthcoming in Foundations of Physics
Revisiting Physical-World Adversarial Attack on Traffic Sign Recognition: A Commercial Systems Perspective
Creators: name: Wang, Ningfei
name: Xie, Shaoyuan
name: Sato, Takami
name: Luo, Yunpeng
name: Xu, Kaidi
name: Chen, Qi Alfred
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cryptography and Security (cs.CR)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Traffic Sign Recognition (TSR) is crucial for safe and correct driving automation. Recent works revealed a general vulnerability of TSR models to physical-world adversarial attacks, which can be low-cost, highly deployable, and capable of causing severe attack effects such as hiding a critical traffic sign or spoofing a fake one. However, so far existing works generally only considered evaluating the attack effects on academic TSR models, leaving the impacts of such attacks on real-world commercial TSR systems largely unclear. In this paper, we conduct the first large-scale measurement of physical-world adversarial attacks against commercial TSR systems. Our testing results reveal that it is possible for existing attack works from academia to have highly reliable (100\%) attack success against certain commercial TSR system functionality, but such attack capabilities are not generalizable, leading to much lower-than-expected attack success rates overall. We find that one potential major factor is a spatial memorization design that commonly exists in today's commercial TSR systems. We design new attack success metrics that can mathematically model the impacts of such design on the TSR system-level attack success, and use them to revisit existing attacks. Through these efforts, we uncover 7 novel observations, some of which directly challenge the observations or claims in prior works due to the introduction of the new metrics.
description: Accepted by NDSS 2025
On the approximation of kinetic equations by moment systems
Creators: name: Dreyer, Wolfgang
name: Junk, Michael
name: Kunik, Matthias
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: maximum entropy
subject: moment methods
subject: Fokker-Planck equation
subject: exact solution
subject: Grad expansion
subject: moment realizability
subject: 82C70
subject: 35L30
subject: 82B40

description: The aim of this article is to show that moment approximations of kinetic equations based on a Maximum Entropy approach can suffer from severe drawbacks if the kinetic velocity space is unbounded. As example, we study the Fokker Planck equation where explicit expressions for the moments of solutions to Riemann problems can be derived. The quality of the closure relation obtained from the Maximum Entropy approach as well as the Hermite/Grad approach is studied in the case of five moments. It turns out that the Maximum Entropy closure is even singular in equilibrium states while the Hermite/Grad closure behaves reasonably. In particular, the admissible moments may lead to arbitrary large speeds of propagation, even for initial data arbitrary close to global eqilibrium.
Electronic properties of graphene hexagonal boron nitride moiré superlattice
Creators: name: Moon, Pilkyung
name: Koshino, Mikito
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically investigate the electronic structures of moiré superlattices arising in monolayer / bilayer graphene stacked on hexagonal boron nitride (hBN) in presence and absence of magnetic field. We develop an effective continuum model from a microscopic tight-binding lattice Hamiltonian, and calculate the electronic structures of graphene-hBN systems with different rotation angles. Using the effective model, we explain the characteristic band properties such as the gap opening at the corners of the superlattice Brillouin zone (mini-Dirac point). We also investigate the energy spectrum and quantum Hall effect of graphene-hBN systems in uniform magnetic field and demonstrate the evolution of the fractal spectrum as a function of the magnetic field. The spectrum generally splits in the valley degrees of freedom ($K$ and $K'$) due to the lack of the inversion symmetry, and the valley splitting is more significant in bilayer graphene on hBN than in monolayer graphene on hBN because of the stronger inversion-symmetry breaking in bilayer.
description: 14 pages, 10 figures
title: Sensibilität und Scham im Alter
Creators: name: Glaser, Sophie
Year: 2021

description: Die vorliegende Masterarbeit beschäftigt sich mit Herausforderungen, die sich für die Pflege von älteren Frauen ergeben und legt ihren Fokus dabei besonders auf die Themenbereiche Sexualität und Intimität. Die Pflege betrifft in diesem Fall nicht nur die Profession selbst, sondern umfasst auch die Betreuung durch Angehörige. Als roter Faden führt die unantastbare Würde des Menschen durch die Arbeit und macht auf Gefahren aufmerksam, die besonders durch Tabuisierung entstehen können. Aufbauend auf allgemeinen Tabuthemen, welche im Prozess des Alterns entstehen können, werden Zusammenhänge beschrieben, die besonders für ältere Frauen abwertend sein können und sie in ihrer Individualität und Autonomie einschränken. Die Auseinandersetzung zeigt, dass eine umfassendere Beschäftigung mit den Themen Sexualität, Intimität und Würde im Alter auf gesellschaftspolitischer Ebene anzustreben wäre. Aber auch im Bildungs- und Erziehungsbereich können sensiblere Umgangsformen und mehr Akzeptanz zu einem positiveren Bild von älteren Frauen in der Gesellschaft beitragen.
description: This master's thesis deals with the challenges that arise in relation to the care of elderly women, focusing particularly on the topics of sexuality and intimacy. In this context, the term "care" does not only refer to the profession itself, but also includes the care provided by relatives. Serving as a common thread that runs through the entire paper, the inviolable dignity of human beings will draw attention to some of the dangers that can arise, particularly as a result of taboos. Building on general taboo subjects that can arise in the course of the aging process, contexts are described that can be particularly pejorative for elderly women and thereby limit them in their individuality and autonomy. On the basis of literary research, this thesis concludes that approaching the topics of sexuality, intimacy and dignity in old age more openly and comprehensively should be strived for at the socio-political level. Additionally, more accepting and sensitive approaches in the educational sector can also contribute to a more positive image of elderly women in society.
Quantum-classical hybrid dynamics: coupling mechanisms and diffusive approximation
Creators: name: Budini, Adrián A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper we demonstrate that any Markovian master equation defining a completely positive evolution for a quantum-classical hybrid state can always be written in terms of four basic coupling mechanisms. Each of them is characterized by a different "backaction" on each subsystem. On this basis, for each case, we find the conditions under which a diffusive limit is approached, that is, the time evolution can be approximated in terms of the first and second derivatives of the hybrid state with respect to a classical coordinate. In this limit, the restricted class of evolutions that guaranty the positivity of the hybrid state at all times (quantum Fokker-Planck master equations) emerges when the coupling mechanisms lead to infinitesimal (non-finite) changes in both the quantum and classical subsystems. A broader class of diffusive evolutions is obtained when positivity is only granted after a transient time or alternatively is granted after imposing an initial finite width on the state of the classical subsystem. A set of representative examples support these results.
description: 17 pages, 6 figures
Autographa gamma . Linn
Creators: name: Hübner, Jacob
Publisher: name: Zenodo
Year: 1827
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Noctuidae
Autographa
Autographa gamma

description: 2484A. Gamma. Linn Syst. Phal. 127 Hübn. Noc. 283
description: Published as part of Jacob Hübner, 1827, A. gamma In: Verzeichnis bekannter Schmetterlinge, pp. 251 in Verzeichnis bekannter Schmetterlinge, bey dem Verfasser zu Finden, 1816 - [1827] on page 251, DOI: 10.5962/bhl.title.48607
A Riemann problem for poroelastic materials with the balance equation for porosity. Part I
Creators: name: Radkevich, Evgeniy V.
name: Wilmański, Krzysztof
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Porous and granular media
subject: solitons
subject: Riemann Problem
subject: asymptotic expansions
subject: 41A60
subject: 35Q51
subject: 35L45
subject: 76S05

description: The paper is devoted to the asymptotic analysis of the multicomponent model of poroelastic materials in which the porosity is described by its own field equation. The model is weakly nonlinear due to the kinematic contributions and a nonlinear dependence of material parameters on an equilibrium porosity. It is shown that the model contains two small parameters. The first one describes the coupling of the skeleton (solid component) with the fluid and its contribution through partial stresses is similar to a dynamical pressure of extended thermodynamics. Mathematically it leads to a dispertion effect similar to this appearing in the Korteweg - de Vries equation. The second small parameter describes a relaxation of porosity. We consider two cases. In the first one the order of magnitude of both small parameters is the same. This seems to correspond to usual porous materials. In the second case the dimensionless relaxation time is propotional to the square of the other parameter. We call such materials granular-like porous. They seem to correspond to compact granular materials with hard and smooth particles. We prove the existence of soliton-like solutions for the porosity and kink-like solutions for the partial velocities under a natural entropy-like selection condition which is also presented in the paper. The proof is based on the asymptotic analysis in which two steps of approximations were investigated. We show that the diffusive interaction force of components - a kind of an internal friction - yields decaying amplitudes of discontinuities. We show as well that in one class of Riemann problems a Saffman-Taylor instability appears. The paper is divided into two parts solely for technical reasons. Therefore the references appear after the second part. In the Appendix we show a few examples of a numerical simulation of a two-dimensional Riemann problem. These were obtained by dr. O. A. Vassilieva (Moscow University). The full numerical analysis shall be presented separately.
A Riemann problem for poroelastic materials with the balance equation for porosity. Part II
Creators: name: Radkevich, Evgeniy V.
name: Wilmański, Krzysztof
Publisher: name: Weierstrass Institute
Year: 2000
Subjects: subject: Porous and granular media
subject: solitons
subject: Riemann Problem
subject: asymptotic expansions
subject: 41A60
subject: 35Q51
subject: 35L45
subject: 76S05

description: In the first part of this work we considered the properties of the first order approximation with respect to a small parameter β. In this part we present the second order approximation which describes the evolution of amplitudes and, consequently, establishes conditions of stability.
Quasinormal Modes of Dilaton Black Holes: Analytic approximations
Creators: name: Malik, Zainab
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We have derived precise analytic expressions for the quasinormal modes of test scalar, and Dirac fields in the background of the dilaton black hole. To achieve this, we employ the higher-order WKB expansion in terms of $1/\ell$. A comparison between the analytic formulas and time-domain integration reveals that the analytic approach generally yields more accurate results than the numerical results previously published using the lower-order WKB approach. We demonstrate that in the eikonal regime, test fields adhere to the correspondence between null geodesics and eikonal quasinormal modes.
description: 5 figures, revtex
Objective Bayesian analysis of "on/off" measurements
Creators: name: Casadei, Diego
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In high-energy astrophysics, it is common practice to account for the background overlaid with the counts from the source of interest with the help of auxiliary measurements carried on by pointing off-source. In this "on/off" measurement, one knows the number of photons detected while pointing to the source, the number of photons collected while pointing away of the source, and how to estimate the background counts in the source region from the flux observed in the auxiliary measurements. For very faint sources, the number of detected photons is so low that the approximations which hold asymptotically are not valid. On the other hand, the analytical solution exists for the Bayesian statistical inference, which is valid at low and high counts. Here we illustrate the objective Bayesian solution based on the reference posterior and compare the result with the approach very recently proposed by \citet{knoetig2014}, discussing its most delicate points. In addition, we propose to compute the significance of the excess with respect to the background-only expectation with a method which is able to account for any uncertainty on the background and is valid for any photon count. This method is compared to the widely used significance formula by \citet{LiMa83}, which is based on asymptotic properties.
title: Living Time
title: Re-evaluating Cinematic Empathy Through Li Zehou
titleType: Subtitle
Creators: name: Batcho, James
Publisher: name: IFILNOVA, Faculdade de Ciências Sociais e Humanas, Universidade NOVA de Lisboa
Year: 2022

description: Empathy is commonly conceived as “understanding” and more particularly to cinema as a representative affectivity, a body-relation that comes through the screen to viewer. This essay considers a concept of empathy that elevates the sensory in any such relation, a feeling within the film’s own immanent relations. This “sensory empathy” pulls the emphasis away from classic Greek necessities of distance and later Enlightenment concepts of perspective, which depend on a cognitive understanding. Instead, it invites us to consider a more Asian gathering of a living time. This will be explored through Chinese scholar Li Zehou, who marks an aesthetic differentiation between Kantian and Confucian time. In the former is a general, objective and spatialized time, while in the latter is found an entanglement of sensuous emotions. Key to this is Li’s writing on “the fusion of feeling and scene” (qing jing jiao rong) taken from Confucian aesthetics. This emphasizes a decoupling from signs, symbols, ideologies and mimetic representations of image and subject to explore how sensuous emotions of nostalgia, yearning, imagination, and human existence become entangled. This essay picks up from these concepts to distinguish Greek mimesis from Chinese expression and spirit to propose a cinema of sensory empathy. Directors under study include Abbas Kiarostami, Salomé Lamas, Chloe Zhao, and in particular, Terrence Malick and Apichatpong Weerasethakul. Exploring Li’s concepts through these works requires an emphasis on the audible and temporal aspects of cinema more than the visual. Through “audible expressions,” time unfolds as a coexistence of durations, weaving the present and the past as a process of thought and memory vital to a sensory empathy. Through audible coexistence, a tether forms between subjects within and the audioviewer who feels rather than gazes or “reads” what is underway. Li’s ideas are the focus, and his work is supported through readings by recent Li scholars. His work is also situated through writings by Bachelard, Baggini, Bergson, Deleuze, Yuhui Jiang, Cecile Chu-chin Sun, and others. The aim of this essay is to provide a non-Western way into the concept of cinematic empathy outside familiar terms such as “sound design,” “representation,” “analysis” and “mise-en-scène,” and to introduce scholars to the work of Li, who has been ignored in cinema studies.
description: Batcho, James (2022). Living Time: Re-evaluating Cinematic Empathy Through Li Zehou. Cinema: Journal of Philosophy and the Moving Image, (14), 26–40. ISSN: 1647-8991
Charged charmonium-like Z+(4430) from rescattering in conventional B decays
Creators: name: Pakhlov, P.
name: Uglov, T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In a previous paper we suggested an explanation for the peak designated as $Z(4430)^+$ in the $ψ^\primeπ^+$ mass spectrum, observed by Belle in ${\bar{\!B}} \to {ψ^\prime} π^+ K$ decays, as an effect of $\bar{\!D}{}^{\,*0}D^{\,+} \to ψ^\primeπ^+$ rescattering in the decays ${\bar{\!B}} \to {D_{s}^{\,\prime -}} {D}$, where the $D_{s}^{\,\prime -}$ is an as-yet unobserved radial excitation of the pseudoscalar ground state $D_{s}^{\,-}$-meson. In this paper, we demonstrate that this hypothesis provides an explanation of the double $Z^+$-like peaking structures, which were studied by LHCb with much higher statistics. While according to our hypothesis, the origin of the peaking structures is purely kinematical, reflecting the presence of a conventional resonance in the hidden intermediate state, the amplitude of the $Z(4430)^+$ peak carries a Breit-Wigner-like complex phase, arising from the intermediate $D_{s}^{\,\prime -}$ resonance. Thus, our hypothesis is entirely consistent with the recent LHCb measurement of the resonant-like amplitude behaviour of the $Z(4430)^+$. We perform a toy fit to the LHCb data, which illustrates that our approach is also consistent with all the observed structure in the LHCb $M({{ψ^\prime}π^+})$ spectrum. We suggest a critical test of our hypothesis that can be performed experimentally.
description: 6 pages, 5 figures
Leiden-Fusion Partitioning Method for Effective Distributed Training of Graph Embeddings
Creators: name: Bai, Yuhe
name: Constantin, Camelia
name: Naacke, Hubert
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: In the area of large-scale training of graph embeddings, effective training frameworks and partitioning methods are critical for handling large networks. However, they face two major challenges: 1) existing synchronized distributed frameworks require continuous communication to access information from other machines, and 2) the inability of current partitioning methods to ensure that subgraphs remain connected components without isolated nodes, which is essential for effective training of GNNs since training relies on information aggregation from neighboring nodes. To address these issues, we introduce a novel partitioning method, named Leiden-Fusion, designed for large-scale training of graphs with minimal communication. Our method extends the Leiden community detection algorithm with a greedy algorithm that merges the smallest communities with highly connected neighboring communities. Our method guarantees that, for an initially connected graph, each partition is a densely connected subgraph with no isolated nodes. After obtaining the partitions, we train a GNN for each partition independently, and finally integrate all embeddings for node classification tasks, which significantly reduces the need for network communication and enhances the efficiency of distributed graph training. We demonstrate the effectiveness of our method through extensive evaluations on several benchmark datasets, achieving high efficiency while preserving the quality of the graph embeddings for node classification tasks.
description: Accepted at the 2024 European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML-PKDD 2024)
title: Das Verhältnis von Vaterschaft und Männlichkeit
Creators: name: Guggi, Elisabeth
Year: 2021

description: Die vorliegende Masterarbeit geht der Frage nach, in welchem Verhältnis Männlichkeit und Vaterschaft stehen und inwiefern sich genderbasierte Klischees sowie naturalisierte Vorstellungen negativ auf das Leben von Männern und Frauen auswirken. Die Arbeit verfolgt das Ziel einer feministischen Männlichkeitsforschung: Daher sollen auf soziale und geschlechterbezogene Ungerechtigkeiten und Asymmetrien aufmerksam gemacht werden, die ihren Ursprung in tradierten, veralteten und einengenden Rollenbildern in Bezug auf Vaterschaft oder Männlichkeit haben. Aufgrund dieser normativen Rollenvorgaben werden Männer und Väter daran gehindert, nach ihren eigenen Wünschen und Vorstellungen zu leben. Ebenso wirkt sich das Loslösen von Stereotypen im Hinblick auf Männlichkeit und Vaterschaft auch positiv auf Frauen aus, da diese in der Care-Arbeit und der Erziehung entlastet werden und durch ihren Partner in Fragen der Vereinbarkeit unterstützt werden. Der methodologische Zugang basiert auf den philosophischen Untersuchungen von Forschungsergebnissen im Bereich der Männlichkeitsforschung und der Soziologie. Dazu zählen die Arbeiten von Raewyn Connell, Pierre Bourdieu und Michael Meuser. Die Ergebnisse der historischen Entwicklung von Vaterschaft haben gezeigt, dass es in der Geschichte kein einheitliches „natürliches“ Vaterbild gegeben hat und dass Vaterschaft von sozialen, technischen und kulturellen Veränderungen abhängig ist, also ein soziales Konstrukt ist. Aus diesem Grund muss gegenwärtig die Vaterschaft neu verhandelt werden, um das widersprüchliche Verhältnis von Vaterschaft und Männlichkeit zu überwinden. Um dies möglichst differenziert leisten zu können, ist ein interdisziplinärer Ansatz zu verfolgen, der es sich zum Ziel setzt, sowohl innerhalb der Politik, der Wirtschaft, der Kunst etc. geschlechterbasierte Klischees abzubauen, damit Grundlagen erarbeitet werden, die es ermöglichen, dass Männer und Frauen ein selbstbestimmtes und freies Leben führen können.
Evidence for broken time-reversal symmetry in the superconducting phase of URu$_2$Si$_2$
Creators: name: Schemm, E. R.
name: Baumbach, R. E.
name: Tobash, P. H.
name: Ronning, F.
name: Bauer, E. D.
name: Kapitulnik, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Recent experimental and theoretical interest in the superconducting phase of the heavy fermion material URu$_2$Si$_2$ has led to a number of proposals in which the superconducting order parameter breaks time-reversal symmetry (TRS). In this study we measured polar Kerr effect (PKE) as a function of temperature for several high-quality single crystals of URu$_2$Si$_2$. We find an onset of PKE below the superconducting transition that is consistent with a TRS-breaking order parameter. This effect appears to be independent of an additional, possibly extrinsic, PKE generated above the hidden order transition at $T_{HO}=17.5$ K, and contains structure below $T_c$ suggestive of additional physics within the superconducting state.
description: 5 pages, 5 figures
Interdisciplinarity and Responsibility for Land Use, GIS and Eco-systems - Some problems of social traps
Creators: name: Lenk, Hans
Publisher: name: Karlsruhe
Year: 2018

description: Interdisciplinary studies and cooperations are necessary for practical work as well as studies in geodesy. Responsibility is a function of power, impact and knowledge. The more strategically central one’s position is in terms of power, influence and knowledge, the higher one’s responsibility is. This is an idea which can be worked out in more detail by using interdisciplinary approaches and distributive models on different levels. Social traps, Prisoners’ Dilemma situations etc. as pertaining to land, soil, and environment as well as some examples from geodesics and the study of the usage of nature systems like lakes and flood plain areas are discussed regarding responsibility and distribution problems. “Naturalists’ Dilemmas” (or “Enjoyers’ Dilemmas”) are sketched and potentially solved by proposing a viable distribution strategy.
Dirac equation in very special relativity for hydrogen atom
Creators: name: Maluf, R. V.
name: Silva, J. E. G.
name: Cruz, W. T.
name: Almeida, C. A. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work, we study the modified Dirac equation in the framework of very special relativity (VSR). The low-energy regime is accessed and the nonrelativistic Hamiltonian is obtained. It turns out that this Hamiltonian is similar to that achieved from the Standard Model Extension (SME) via coupling of the spinor field to a Lorentz-violating term, but new features arise inherited from the non-local character of the VSR. In addition, the implications of the VSR-modified Lorentz symmetry on the spectrum of a hydrogen atom are determined by calculating the first-order energy corrections in the context of standard quantum mechanics. Among the results, we highlight that the modified Hamiltonian provides non-vanishing corrections which lift the degeneracy of the energy levels and allow us to find an upper bound upon the VSR-parameter.
description: Revtex style, 13 pages, 1 table, references added, improved text, published in PLB
Yang-Mills theory for semidirect products ${\rm G}\ltimes\mathfrak{g}^*$ and its instantons
Creators: name: Ruiz, F. Ruiz
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Yang-Mills theory with a symmetry algebra that is the semidirect product $\mathfrak{h}\ltimes\mathfrak{h}^*$ defined by the coadjoint action of a Lie algebra $\mathfrak{h}$ on its dual $\mathfrak{h}^*$ is studied. The gauge group is the semidirect product ${\rm G}_{\mathfrak{h}}\ltimes{\mathfrak{h}^*}$, a noncompact group given by the coadjoint action on $\mathfrak{h}^*$ of the Lie group ${\rm G}_{\mathfrak{h}}$ of $\mathfrak{h}$. For $\mathfrak{h}$ simple, a method to construct the self-antiself dual instantons of the theory and their gauge non\-equivalent deformations is presented. Every ${\rm G}_{\mathfrak{h}}\ltimes{\mathfrak{h}^*}$ instanton has an embedded ${\rm G}_{\mathfrak{h}}$ instanton with the same instanton charge, in terms of which the construction is realized. As an example,$\mathfrak{h}=\mathfrak{s}\mathfrak{u}(2)$ and instanton charge one is considered. The gauge group is in this case $SU(2)\ltimes{\bf R}^3$. Explicit expressions for the selfdual connection, the zero modes and the metric and complex structures of the moduli space are given.
description: 21 pages; no figures; typos corrected
Autorska prava i slobodne licence (za istraživače)
Creators: name: Ševkušić, Milica
Publisher: name: Zenodo
Year: 2018
Subjects: samoarhiviranje
Creative Commons licence
copyright
copyleft
srodna prava
industrijska svojina

description: Prezentacija za post-konferencijsko predavanje u okviru PSSOH konferencije (http://pssoh.etf.bg.ac.rs/) na temu autorskih prava i slobodnih licenci. Predavanje je održano 20. oktobra 2018. na Elektrotehničkom fakultetu - Univerziteta u Beogradu.
description: Title in English for PSSOH 2018 Post-Conference lecture held by Milica Ševkušić is "Copyright and free licences for researchers".