cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Digitale Milieus? Implizites Wissen in computerbasierten Sozialitäten
Creators: name: Sebald, Gerd
Publisher: name: Zeitschrift für Theoretische Soziologie
Year: 2014

description: Seit die vernetzte Computertechnik sich zu verbreiten begonnen hat, und insbesondere seit die Vernetzung global ausgebaut wurde, haben sich erstaunlich stabile computerbasierte Sozialitäten herausgebildet. Sei es in den kooperativen Zusammenhängen der Free/Open Source-Softwareentwicklung, sei es im Kooperationsprojekt Wikipedia oder in den Spielgruppen der Online-Rollenspiele. Das gelingt trotz der Kontingenzen und Unwahrscheinlichkeiten, die computerbasierter Kommunikation per se eignen. Die räumliche und, im Falle von asynchronen Medien, auch die zeitliche Trennung machen Verweise auf Kontexte schwierig und potentiell missverständlich. Es fehlt die parasprachliche Ebene in Form von Mimik oder Gestik und die Kommunikationspartner können prinzipiell anonym bleiben. Computerbasierte soziale Beziehungen bleiben unverbindlich. Die Situation der doppelten Kontingenz ist in der rein computerbasierten Kommunikation nahezu ideal gegeben.
description: Zeitschrift für Theoretische Soziologie, 2014: Sonderband №1 // Die Form des Milieus. Zum Verhältnis von gesellschaftlicher Differenzierung und Formen der Vergemeinschaftung
The CoNFIG Catalogue - II. Comparison of Space Densities in the FR Dichotomy
Creators: name: Gendre, Melanie A.
name: Best, P. N.
name: Wall, J. V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: This paper focuses on a comparison of the space densities of FRI and FRII sources at different epochs, with a particular focus on FRI sources. First, we present the concluding steps in constructing the Combined NVSS-FIRST Galaxy catalogue (CoNFIG), including new VLA observations, optical identifications and redshift estimates. The final catalogue consists of 859 sources over 4 samples (CoNFIG-1, 2, 3 and 4 with flux density limits of S_1.4GHz = 1.3, 0.8, 0.2 and 0.05 Jy respectively). It is 95.7% complete in radio morphology classification and 74.3% of the sources have redshift data. Combining CoNFIG with complementary samples, the distribution and evolution of FRI and FRII sources are investigated. We find that FRI sources undergo mild evolution and that, at the same radio luminosity, FRI and FRII sources show similar space density enhancements in various redshift ranges, possibly implying a common evolution.
description: 15 pages, 15 figures, 6 tables + appendix (80 pages). accepted in M.N.R.A.S
Versionen: Das Sonderwissen sozialer Milieus und seine Differenzierung
Creators: name: Zifonun, Dariuš
Publisher: name: Zeitschrift für Theoretische Soziologie
Year: 2014

description: In Milieus verdichten sich die Interaktions- und Kommunikationszusammenhänge sozialer Welten zu einem „common ground“ (Gumperz 2002). Konstitutiv für diese posttraditionalen Gemeinschaften (Hitzler 1998) ist, wie für Webers „Sippe“, ein „reales Gemeinschaftshandeln“, was sie von abstrakten politischen Gemeinschaften wie der Nation oder von der ‚ethnischen‘ Gruppe unterscheidet, die „nur (geglaubte) ‚Gemeinsamkeit‘, nicht aber ‚Gemeinschaft‘ ist“ (Weber 1972: 237). Es handelt sich bei ihnen um ‚Gruppen Gleichgesinnter‘, bei denen sich die Bindung ans Milieu vom issuezentrierten Handlungsinteresse zum emotional grundierten Selbstzweck transzendiert.
description: Zeitschrift für Theoretische Soziologie, 2014: Sonderband №1 // Die Form des Milieus. Zum Verhältnis von gesellschaftlicher Differenzierung und Formen der Vergemeinschaftung
Essays on firm efficiency with imperfectly competitive input markets: an empirical analysis
Creators: name: Forlani, Emanuele <1979>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: SECS-P/01 Economia politica

description: In the thesis I exploit an empirical analysis on firm's productivity. I relate
the efficiency at plant level with the input market features and I suggest an estimation technique for production function that takes into account firm's liquidity
constraints. The main results are three. When I consider services as inputs for manufacturing firm's production process, I find that more competition in service
sector affects positively plants productivity and export decision. Secondly liquidity constraints are important for the calculation of firm's productivity because
they are a second source of firm's heterogeneity. Third liquidity constraints are important for firm's internationalization
Deceleration of continuous molecular beams
Creators: name: Hudson, Eric R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: A method for decelerating a continuous beam of neutral polar molecules is theoretically demonstrated. This method utilizes non-uniform, static electric fields and regions of adiabatic population transfer to generate a mechanical force that opposes the molecular beam's velocity. By coupling this technique with dissipative trap-loading, molecular densities $\geq10^{11}$ cm$^{-3}$ are possible. When used in combination with forced evaporative cooling the proposed method may represent a viable route to quantum degeneracy for a wide-class of molecular species.
Sozialstrukturanalyse ‚feiner Körnung‘ oder subjektzentrierte Lebensweltanalyse?
Creators: name: Rebstein, Bernd
name: Schnettler, Bernt
Publisher: name: Zeitschrift für Theoretische Soziologie
Year: 2014

description: Lange Zeit haben zwei konträre Ansätze der Milieuforschung in verschiedenen Subuniversen disziplinärer Spezialisierung nur unzureichend voneinander Notiz genommen. Im Anschluss an die Individualisierungsthese (Beck 1983, 1986) und die Kritik an den inadäquaten Beschreibungsmöglichkeiten traditioneller klassen- und schichtorientierter Ansätze kam es zu ersten ernstzunehmenden Vermittlungsversuchen zwischen klassisch sozialstrukturell orientierten und subjektzentrierten Konzeptualisierungen innerhalb der deutschen Soziologie (zum Beispiel Hradil 1987; Vester et al. 1993), die auch den Milieubegriff wieder stärker ins Zentrum rückten. Unlängst hat sich nun eine weiterführende Debatte entwickelt, bei der die Suche nach Anschlussstellen oder doch wenigsten Übersetzungsmöglichkeiten der Milieuforschung intensiviert worden ist. In diesem Beitrag werden wir zunächst ihre sozialstrukturelle, anschließend ihre subjektzentrierte Entwicklungslinie rekapitulieren. Gestützt auf eigene empirische Forschung wollen wir danach den Milieubegriff weiter schärfen. Schließlich gehen wir der Frage nach, welche Möglichkeiten und Grenzen einer Konvergenz zwischen beiden Forschungstraditionen bestehen.
description: Zeitschrift für Theoretische Soziologie, 2014: Sonderband №1 // Die Form des Milieus. Zum Verhältnis von gesellschaftlicher Differenzierung und Formen der Vergemeinschaftung
Xenon doping of Liquid Argon in ProtoDUNE Single Phase
Creators: name: Gallice, Niccolò
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The Deep Underground Neutrino Experiment (DUNE) will be the next generation long-baseline neutrino experiment. The far detector is designed as a complex of four LAr-TPC (Liquid Argon Time Projection Chamber) modules with 17 kt of liquid argon each. The development and validation of the first far detector technology is pursued through ProtoDUNE Single Phase (ProtoDUNE-SP), a 770 t LAr-TPC at CERN Neutrino Platform. Crucial in DUNE is the Photon Detection System that will ensure the trigger of non-beam events - proton decay, supernova neutrino burst and BSM searches - and will improve the timing and calorimetry for neutrino beam events. Doping liquid argon with xenon is a known technique to shift the light emitted by argon (128 nm) to a longer wavelength (178 nm) to ease its detection. The largest xenon doping test ever performed in a LAr-TPC was carried out in ProtoDUNE-SP. From February to May 2020, a gradually increasing amount of xenon was injected to also compensate for the light loss due to air contamination. The response of such a large TPC has been studied using the ProtoDUNE-SP Photon Detection System (PDS) and a dedicated setup installed before the run. With the first it was possible to study the light collection efficiency with respect to the track position, while with the second it was possible to distinguish the xenon light from the LAr light. The light shifting mechanism proved to be highly efficient even at small xenon concentrations (< 20 ppm in mass) furthermore it allowed recovering the light quenched by pollutants. The light collection improved far from the detection plane, enhancing the photon detector response uniformity along the drift direction and confirming a longer Rayleigh scattering length for 178 nm photons, with respect to 128 nm ones. The charge collection by the TPC was monitored proving that xenon up to 20 ppm does not impact its performance.
description: 7 pages, 5 figures, proceedings of LIDINE 2021 - Light Detection in Noble Elements; to be published in JINST
Die Milieuanalyse der Praxeologischen Wissenssoziologie
Creators: name: Bohnsack, Ralf
Publisher: name: Zeitschrift für Theoretische Soziologie
Year: 2014

description: Das zunehmende Interesse an der Milieuforschung bzw. die Suche nach neuen theoretischen und methodischen Grundlagen für derartige Analysen verweisen zumindest teilweise auf das Verblassen einer Dominanz jenes Diskurses, welcher durch das Individualisierungstheorem geprägt ist und insbesondere in den 1990er Jahren noch im Zentrum der Sozialwissenschaften stand. Die Rede von der „Zerbrechlichkeit sozialer Lagen und Biographien“ (Beck 1996: 21), von der „Bastel-Existenz“ (Hitzler/Honer 1994), von „Patchwork-Identität“ (Keupp et al. 1999: 74) impliziert, wie bereits in den 1990er Jahren kritisiert wurde (Neckel 1993: 79; auch Bohnsack 1998: 77) eine „Verfallsrhetorik“, die – wie sich nun rückblickend zeigt – in ihrer Erklärungs- oder Prognosekraft recht begrenzt ist. Diese Argumentation ist von vornherein mit einer Art ‚Kurzschluss‘ behaftet, dahingehend, dass die Art und Weise, wie eine Erosion sozialer Lagen oder Milieus verarbeitet wird, als ein ausschließlich oder primär individueller oder subjektiver Prozess verstanden wurde. Dass gerade aus einem kollektiven, also gemeinsamen oder besser: strukturidentischen Erleben von Diskontinuitäten und Brüchen im Bereich sozialer Lagerungen und milieuspezifischer Bindungen neue Formen der Zugehörigkeit und Milieubildung entstehen können, wird auch dort letztlich nicht erkannt, wo von „posttraditionalen Gemeinschaften“ die Rede war oder ist.
description: Zeitschrift für Theoretische Soziologie, 2014: Sonderband №1 // Die Form des Milieus. Zum Verhältnis von gesellschaftlicher Differenzierung und Formen der Vergemeinschaftung
On the existence of open and bi-continuing codes
Creators: name: Jung, Uijin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37B10, 37B40

description: Given an irreducible sofic shift X, we show that an an irreducible SFT Y of lower entropy is a factor of X if and only if it is a factor of X by an open bi-continuing code. If these equivalent conditions hold and Y is mixing, then any code from a proper subshift of X to Y can be extended to an open bi-continuing code on X. These results are still valid when X is assumed to be only an almost specified shift, i.e., a subshift satisfying an irreducible version of the specification property.
description: 20 pages, 3 figures. v2: minor revision. typos corrected. Final version to appear in Transactions AMS
On square summability and uniqueness questions concerning nonstationary stokes flow in an exterior domain
Creators: name: Ma, Chun-Ming
Publisher: name: University of British Columbia
Year: 2010

description: In this thesis we investigate the square summability, uniqueness, and convergence to steady state of solutions of the nonstationary Stokes equations in an exterior domain. A class of generalized solutions (which will be called class H[sub o] solutions), whose members are required a priori to have finite Dirichlet integrals but not necessarily to have finite L² norms, has been introduced by J.G. Heywood for the purpose of studying the convergence of nonstationary solutions to stationary ones as time t → ∞. In our present work, we prove that, in the case of an exterior domain Ω, of R[sup n](n > 2) , such solutions are necessarily square-summable if both the initial data and the force are square-summable. 2 We give a partial result for Ω in R². Furthermore, we prove that if Ω = R³ the unique class H[sub o] solution is identical with the unique finite energy solution (i.e. L²(Ω)) of various classes when the data permits existence of both types of solutions. This has enabled us to show that the finite energy solutions of a particular nonstationary Stokes problem converge to solutions of steady state as t → ∞. We have also succeeded in extending the definition of class H[sub o] solutions to nonstationary Stokes problems with general nonhomogeneous boundary values in such, a way that the uniqueness theorem for such solutions is preserved.
Einleitung: Die Form des Milieus
Creators: name: Isenböck, Peter
name: Nell, Linde
name: Renn, Joachim
Publisher: name: Zeitschrift für Theoretische Soziologie
Year: 2014

description: Es kann in der Soziologie nicht als geklärt gelten, was genau der Begriff des „sozialen Milieus“ bedeuten soll, wie die Extension des Begriffs allgemein oder auch in besonderen Fällen zu bestimmen ist, welche Rolle Milieus in den Zusammenhängen von sozialer Schichtung oder von kultureller Transformation nun eigentlich spielen sollen, können oder womöglich „wollen“. Gleichwohl ist der Begriff des Milieus ein zentraler Bestandteil verschiedener analytischer Vokabulare des Fachs, und genießt über die Grenzen zwischen solchen Vokabularen hinweg große Aufmerksamkeit. Von Durkheim bis zu den Arbeiten von Gerhard Schulze (1996) und Michael Vester (1997 und Vester et al. 2001), von der klassischen Theorie der Moderne bis zur rezenten Diskussion um die Schichtungsprofile der Gegenwartsgesellschaft also, reicht die Bandbreite der Positionen, für die das „Milieu“ zu den basalen Kategorien der Analyse der Gesellschaft gehört. Innerhalb dieses Spektrums weichen die Begriffe vor allem durch die Beziehung, in die sie durch Unterscheidung zu anderen Begriffen gebracht werden, und durch die explanativen und methodischen Regeln, die ihren Gebrauch festlegen, erheblich voneinander ab.
description: Zeitschrift für Theoretische Soziologie, 2014: Sonderband №1 // Die Form des Milieus. Zum Verhältnis von gesellschaftlicher Differenzierung und Formen der Vergemeinschaftung
Intolleranza zero. Etica protestante e spirito del liberalismo in Max Weber
Creators: name: Erizi, Andrea
Publisher: name: Università degli Studi di Firenze
Year: 2014

description: The aim of this article is to examine Max Weber’s genealog y of liberalism as a political turn paradoxically rooted in two aspects of ascetic Protestantism’s world view: obsession with the purity of our own conscience, and indifference towards other people. This “heterodox” approach to the birth of tolerance is then analyzed in the light of the concept of polytheism. I will argue that Weber’s normative stance on how we should face polytheism is deeply indebted to the ascetic Protestantism’s solution to it, whereas our age tends to conceive of pluralism as relativism, driving the spirit of liberalism away from its origins.
description: SocietàMutamentoPolitica, Vol 5, N° 9 (2014): 1864-2014 – Max Weber: a Contemporary Sociologist
Angular Momentum Transport in Extended Galactic Disks
Creators: name: McNally, C. P.
name: Wadsley, J.
name: Couchman, H. M. P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We demonstrate a significant difference in the angular momentum transport properties of galactic disks between regions in which the interstellar medium is single phase or two phase. Our study is motivated by observations of HI in extended galactic disks which indicate velocity dispersions of nonthermal origin, suggesting that turbulence in the gas may be contributing significantly to the observed dispersion. To address this, we have implemented a shearing-box framework within the FLASH code. The new code was used to perform local simulations of galactic disks that incorporate differential rotation, self-gravity, vertical stratification, hydrodynamics and cooling. These simulations explore plausible mechanisms for driving turbulent motions via the thermal and self-gravitational instabilities coupling to differential rotation. Where a two-phase medium develops, gravitational angular momentum transporting stresses are much greater, creating a possible mechanism for transferring energy from galactic rotation to turbulence. In simulations where the disk conditions do not trigger the formation of a two-phase medium, it is found that perturbations to the flow damp without leading to a sustained mechanism for driving turbulence. The differing angular momentum transport properties of the single- and two-phase regimes of the disk suggest that a significant, dynamically motivated division can be drawn between the two, even when this division occurs far outside the star formation cutoff in a galactic disk.
description: ApJ Letters accepted, 5 pages, 3 figure
Solar flows and their effect on frequencies of acoustic modes
Creators: name: Chatterjee, Piyali
name: Antia, H. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have calculated the effects of large scale solar flows like the meridional circulation, giant convection cells and solar rotation on the helioseismic splitting coefficients using quasi-degenerate perturbation theory (QDPT). Our investigation reveals that the effect of poloidal flows like the large scale meridional circulation are difficult to detect in observational data of the global acoustic modes since the frequency shifts are much less than the errors. However, signatures of large scale convective flows may be detected if their amplitude is sufficiently large by looking for frequency shifts due to nearly degenerate modes coupled by convection. In this comprehensive study, we attempt to put limits on the magnitude of flow velocities in giant cells by comparing the splitting coefficients obtained from the QDPT treatment with observational data.
description: 11 Figures 1 Table (accepted for publication in ApJ)
title: Glioma de bajo grado: Actualización 2013.
Creators: name: Torres Diez, Eduardo
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Neuroradiology brain
subject: CT
subject: MR
subject: MR-Functional imaging
subject: Education
subject: Diagnostic procedure
subject: Surgery
subject: Neoplasia
subject: Seizure disorders

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
El propósito de esta exposición es: 1.
Revisar los hallazgos patológicos y clínicos de los gliomas de bajo grado y el manejo terapéutico moderno. 2.
Describir los principales hallazgosde imagenque nos llevan a diagnosticar un glioma de bajo...
AdvCodeMix: Adversarial Attack on Code-Mixed Data
Creators: name: Das, Sourya Dipta
name: Basak, Ayan
name: Mandal, Soumil
name: Das, Dipankar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Research on adversarial attacks are becoming widely popular in the recent years. One of the unexplored areas where prior research is lacking is the effect of adversarial attacks on code-mixed data. Therefore, in the present work, we have explained the first generalized framework on text perturbation to attack code-mixed classification models in a black-box setting. We rely on various perturbation techniques that preserve the semantic structures of the sentences and also obscure the attacks from the perception of a human user. The present methodology leverages the importance of a token to decide where to attack by employing various perturbation strategies. We test our strategies on various sentiment classification models trained on Bengali-English and Hindi-English code-mixed datasets, and reduce their F1-scores by nearly 51 % and 53 % respectively, which can be further reduced if a larger number of tokens are perturbed in a given sentence.
description: Accepted to CODS-COMAD 2022
title: Tumores infrecuentes: melanomas de intestino delgado. Caracterización mediante TC.
Creators: name: Santa Eulalia Mainegra, Erick
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Abdomen
subject: CT
subject: Diagnostic procedure
subject: Neoplasia

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Se presentan los diversos tipos anatomo-patológicos de tumores de intestino delgado,
describiendo los hallazgos radiológicos en la TC en cada uno de ellos: tumor carcinoide,
adenocarcinoma intestinal,
tumor del estroma gastro-intestinal...
ICHKI ISHLAR ORGANLARI FAOLIYAT KO'RSATKICHLARINI TAHLIL QILISHNING  ASOSIY YO'NALISHLARI VA O'ZIGA XOS JIHATLARI
Creators: name: Ahmadaliyev, Rashidxon
Publisher: name: Zenodo
Year: 2023

description: Muallif mazkur maqolada Ichki ishlar organlari faoliyat ko'rsatkichlarini tahlil qilish asosiy yo'nalishlari va o'ziga xos jihatlari  va ushbu faoliyatni hozirgi kunfagi ahamiyati to’g’risida yoritgan.
Nucleosynthesis Constraints on a Massive Gravitino in Neutralino Dark Matter Scenarios
Creators: name: Cyburt, Richard H.
name: Ellis, John
name: Fields, Brian D.
name: Luo, Feng
name: Olive, Keith A.
name: Spanos, Vassilis C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The decays of massive gravitinos into neutralino dark matter particles and Standard Model secondaries during or after Big-Bang nucleosynthesis (BBN) may alter the primordial light-element abundances. We present here details of a new suite of codes for evaluating such effects, including a new treatment based on PYTHIA of the evolution of showers induced by hadronic decays of massive, unstable particles such as a gravitino. We also develop an analytical treatment of non-thermal hadron propagation in the early universe, and use this to derive analytical estimates for light-element production and in turn on decaying particle lifetimes and abundances. We then consider specifically the case of an unstable massive gravitino within the constrained minimal supersymmetric extension of the Standard Model (CMSSM). We present upper limits on its possible primordial abundance before decay for different possible gravitino masses, with CMSSM parameters along strips where the lightest neutralino provides all the astrophysical cold dark matter density. We do not find any CMSSM solution to the cosmological Li7 problem for small m_{3/2}. Discounting this, for m_{1/2} ~ 500 GeV and tan beta = 10 the other light-element abundances impose an upper limit m_{3/2} n_{3/2}/n_γ< 3 \times 10^{-12} GeV to < 2 \times 10^{-13} GeV for m_{3/2} = 250 GeV to 1 TeV, which is similar in both the coannihilation and focus-point strips and somewhat weaker for tan beta = 50, particularly for larger m_{1/2}. The constraints also weaken in general for larger m_{3/2}, and for m_{3/2} > 3 TeV we find a narrow range of m_{3/2} n_{3/2}/n_γ, at values which increase with m_{3/2}, where the Li7 abundance is marginally compatible with the other light-element abundances.
description: 74 pages, 40 Figures
Magnetism of small V clusters embedded in a Cu fcc matrix: an ab initio study
Creators: name: Felix-Medina, R. E.
name: Leyva-Lucero, M. A.
name: Guirado-Lopez, R. A.
name: Meza-Aguilar, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present extensive first principles density functional theory (DFT) calculations dedicated to analyze the magnetic and electronic properties of small V$_{n}$ clusters (n=1,2,3,4,5,6) embedded in a Cu fcc matrix. We consider different cluster structures such as: i) a single V impurity, ii) several V$_{2}$ dimers having different interatomic distance and varying local atomic environment, iii) V$_{3}$ and iv) V$_{4}$ clusters for which we assume compact as well as 2- and 1-dimensional atomic configurations and finally, in the case of the v) V$_{5}$ and vi) V$_{6}$ structures we consider a square pyramid and a square bipyramid together with linear arrays, respectively. In all cases, the V atoms are embedded as substitutional impurities in the Cu network. In general, and as in the free standing case, we have found that the V clusters tend to form compact atomic arrays within the cooper matrix. Our calculated non spin-polarized density of states at the V sites shows a complex peaked structure around the Fermi level that strongly changes as a function of both the interatomic distance and local atomic environment, a result that anticipates a non trivial magnetic behavior. In fact, our DFT calculations reveal, in each one of our clusters systems, the existence of different magnetic solutions (ferromagnetic, ferrimagnetic, and antiferromagnetic) with very small energy differences among them, a result that could lead to the existence of complex finite-temperature magnetic properties. Finally, we compare our results with recent experimental measurements.
description: 7 pages and 4 figures
Ab initio simulation framework for Majorana transport in 2D materials: towards topological quantum computing
Creators: name: Lee, Y.
name: Agarwal, T.
name: Luisier, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present an ab initio modeling framework to simulate Majorana transport in 2D semiconducting materials, paving the way for topological qubits based on 2D nanoribbons. By combining density-functional-theory and quantum transport calculations, we show that the signature of Majorana bound states (MBSs) can be found in 2D material systems as zero-energy modes with peaks in the local density-of-states. The influence of spin-orbit coupling and external magnetic fields on Majorana transport is studied for two relevant 2D materials, WSe2 and PbI2. To illustrate the capabilities of the proposed ab initio platform, a device structure capable of hosting MBSs is created from a PbI2 nanoribbon and carefully investigated. These results are compared to InSb nanowires and used to provide design guidelines for 2D topological qubits.
description: 5 pages, 6 figures
title: Mamografía con contraste (Mamografía espectral con realce de contraste) ¿Y esto en qué consiste?
Creators: name: Travieso Aja, María del Mar
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Neoplasia
subject: Diagnostic procedure
subject: Technical aspects
subject: Contrast agent-intravenous
subject: Mammography
subject: Breast

description: Objetivos
Material y método
Resultados
Conclusiones
Bibliografía
description: Objetivos:
El principal objetivo es familiarizar a los profesionales de la radiología con la mamografía espectral con realce de contraste y sustracción (CESM). Se trata de una nueva técnica de diagnóstico por imagen en la patología mamaria que no se...
Semisimple symmetric spaces
Creators: name: Rossmann, Wulf
Publisher: name: University of British Columbia
Year: 2010

description: The thesis contains a structure theory for semisimple symmetric spaces with applications to related problems in analysis. It is shown how a root system can be associated with a semisimple symmetric space (abr. "s.s, space"). Analogues of the Cartan, Iwasawa, Bruhat decompositions of a semisimple Lie group are established for arbitrary s.s. spaces. The "conical dual" of a s.s. space is introduced. The representation of a semisimple transformation group on L²-functions on the conical dual is decomposed as a direct integral of principal series representations. The algebra of invariant differential operators on the conical dual is found to be commutative and its eigenfunctions are determined. Intertwining operators between compactly supported functions on a s.s. space and functions on its conical dual, and v.v., are defined. The definition is extended to a larger class of functions by an investigation of the convergence properties of these operators. An application to the harmonic analysis on SO(p,q)₀/SO(p,q-1)₀ is indicated.
A Derivation of an Off-Shell N = (2,2) Supergravity Chiral Projection Operator
Creators: name: Gates, S. James
name: Morrison, Akin
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Utilizing the known off-shell formulation of 2D, N = (2,2) supergravity, containing a finite number of auxiliary fields, there is shown to exist a simple form for a 'chiral projection operator' and an explicit expression for it is given.
description: 10 pages, no figures, one new reference added
A Deep Search for Faint Chandra X-ray Sources, Radio Sources, and Optical Counterparts in NGC 6752
Creators: name: Cohn, Haldan N.
name: Lugger, Phyllis M.
name: Zhao, Yue
name: Tudor, Vlad
name: Heinke, Craig O.
name: Cool, Adrienne M.
name: Anderson, Jay
name: Strader, Jay
name: Miller-Jones, James C. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the results of a deep search for faint Chandra X-ray sources, radio sources, and optical counterparts in the nearby, core-collapsed globular cluster, NGC 6752. We combined new and archival Chandra imaging to detect 51 X-ray sources (12 of which are new) within the 1.9 arcmin half-light radius. Three radio sources in deep ATCA 5 and 9 GHz radio images match with Chandra sources. We have searched for optical identifications for the expanded Chandra source list using deep Hubble Space Telescope photometry in B, R, H-alpha, UV, and U. Among the entire sample of 51 Chandra sources, we identify 18 cataclysmic variables (CVs), 9 chromospherically active binaries (ABs), 3 red giants (RGs), 3 galaxies (GLXs), and 6 active galactic nuclei (AGNs). Three of the sources are associated with millisecond pulsars (MSPs). As in our previous study of NGC 6752, we find that the brightest CVs appear to be more centrally concentrated than are the faintest CVs, although the effect is no longer statistically significant as a consequence of the inclusion in the faint group of two intermediate brightness CVs. This possible difference in the radial distributions of the bright and faint CV groups appears to indicate that mass segregation has separated them. We note that photometric incompleteness in the crowded central region of the cluster may also play a role. Both groups of CVs have an inferred mass above that of the main-sequence turnoff stars. We discuss the implications for the masses of the CV components.
description: 35 pages, 30 figures
Identifying Functions and Behaviours of Social Robots during Learning Activities: Teachers' Perspective
Creators: name: Ceha, Jessy
name: Law, Edith
name: Kulić, Dana
name: Oudeyer, Pierre-Yves
name: Roy, Didier
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: With advances in artificial intelligence, research is increasingly exploring the potential functions that social robots can play in education. As teachers are a critical stakeholder in the use and application of educational technologies, we conducted a study to understand teachers' perspectives on how a social robot could support a variety of learning activities in the classroom. Through interviews, robot puppeteering, and group brainstorming sessions with five elementary and middle school teachers from a local school in Canada, we take a socio-technical perspective to conceptualize possible robot functions and behaviours, and the effects they may have on the current way learning activities are designed, planned, and executed. Overall, the teachers responded positively to the idea of introducing a social robot as a technological tool for learning activities, envisioning differences in usage for teacher-robot and student-robot interactions. Further, Engeström's Activity System Model -- a framework for analyzing human needs, tasks, and outcomes -- illustrated a number of tensions associated with learning activities in the classroom. We discuss the fine-grained robot functions and behaviours conceived by teachers, and how they address the current tensions -- providing suggestions for improving the design of social robots for learning activities.
description: This is a preprint of an article published in The International Journal of Social Robotics. The final authenticated version is available online at: https://doi.org/10.1007/s12369-021-00820-7
title: Diagnóstico y tratamiento de las fístulas carótido-cavernosas
Creators: name: Navarro Aguilar, Vicente
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Interventional vascular
subject: Emergency
subject: Head and neck

description: Objetivos
Material y método
Resultados
Conclusiones
Bibliografía
description: Objetivos:
Los objetivos fundamentales de este trabajo son,
por una parte,
conocer la etiopatogenia,
clasificación y manifestaciones clínicas de las fístulas carótido-cavernosas (FCC),
así como ilustrar los hallazgos radiológicos de esta rara patología...
Brief Review of Recent Advances in Understanding Dark Matter and Dark Energy
Creators: name: Oks, Eugene
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Dark sector, constituting about 95 percent of the Universe, remains the subject of numerous studies. There are lots of models dealing with the cause of the effects assigned to dark matter and dark energy. This brief review is devoted to the very recent theoretical advances in these areas: only to the advances achieved in the last few years. For example, in section devoted to particle dark matter we overview recent publications on sterile neutrinos, self-interacting dark matter, dibarions, dark matter from primordial bubbles, primordial black holes as dark matter, axions escaping from neutron stars, and dark and usual matter interacting via the fifth dimension. We also overview the second flavor of hydrogen atoms: their existence was proven by analyzing atomic experiments and is also evidenced by the latest astrophysical observations of the 21 cm spectral line from the early Universe. While discussing non-particle models of the cause of dark matter effects, we refer to modified Newtonian dynamics and modifications of the strong equivalence principles. We also consider exotic compact objects, primordial black holes, and retardation effects. Finally, we review recent studies on the cause of dark energy effects. Specifically, we cover two disputes that arose in 2019 and 2020 on whether the observations of supernovas, previously interpreted as the proof of the existence of dark energy, could have alternative explanations. Besides, we note a study of 2021, where dark energy is substituted by a new hypothetical type of dark matter having a magnetic-type interaction. We also refer to the recent model of a system of nonrelativistic neutral gravitating particles providing an alternative explanation of the entire dynamics of the Universe expansion. without introducing dark energy or new gravitational degrees of freedom.
On the tensor product of two oriented quantum algebras
Creators: name: Ma, Tianshui
name: Yang, Haiyang
name: Yang, Tao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Rings and Algebras (math.RA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: In this paper, we give the oriented quantum algebra (abbr. OQA) structures on the tensor product of two different OQAs by using Chen's weak $\mathfrak{R}$-matrix in [J. Algebra 204(1998):504-531]. As a special case, the OQA structures on the tensor product of an OQA with itself are provided, which are different from Radford's results in [J. Knot Theory Ramifications 16(2007):929-957].
Coupling-induced nonunitary and unitary scattering in anti-PT-symmetric non-Hermitian systems
Creators: name: Xu, H. S.
name: jin, L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the properties of two anti-parity-time (anti-PT )-symmetric four-site scattering centers. The anti-PT -symmetric scattering center may have imaginary couplings, real couplings, and real on-site potentials. The only difference between the two scattering centers is the coupling between two central sites of the scattering center, which plays a crucial role in determining the parity of anti-PT symmetry and significantly affects the scattering properties. For the imaginary coupling, the even-parity anti-PT -symmetric scattering center possesses nonunitary scattering and the difference between the reflection and transmission is unity; for the real coupling, the odd-parity anti-PT -symmetric scattering center possesses unitary scattering and the sum of the reflection and transmission is unity. The coupling-induced different scattering behaviors are verified in the numerical simulations. Our findings reveal that a significant difference in the dynamics can be caused by a slight difference between two similar anti-PT -symmetric non-Hermitian scattering centers.
description: 8 pages, 6 figures
The domain wall spin torque-meter
Creators: name: Miron, I. M.
name: Zermatten, P. -J.
name: Gaudin, G.
name: Auffret, S.
name: Rodmacq, B.
name: Schuhl, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We report the direct measurement of the non-adiabatic component of the spin-torque in domain walls. Our method is independent of both the pinning of the domain wall in the wire as well as of the Gilbert damping parameter. We demonstrate that the ratio between the non-adiabatic and the adiabatic components can be as high as 1, and explain this high value by the importance of the spin-flip rate to the non-adiabatic torque. Besides their fundamental significance these results open the way for applications by demonstrating a significant increase of the spin torque efficiency.
description: 12 pages plus supplementary notes
Resolved stellar mass maps of galaxies. I: method and implications for global mass estimates
Creators: name: Zibetti, Stefano
name: Charlot, Stephane
name: Rix, Hans-Walter
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: (Abridged) We introduce a novel technique to construct spatially resolved maps of stellar mass surface density in galaxies based on optical and near IR imaging. We use optical/NIR colour(s) to infer effective stellar mass-to-light ratios (M/L) at each pixel, which are then multiplied by the surface brightness to obtain the local stellar surface mass density. We build look-up tables to express M/L as a function of colour(s) by marginalizing over a Monte Carlo library of 50,000 stellar population synthesis (SPS) models by Charlot & Bruzual (2007), which include a revised prescription for the TP-AGB stellar evolutionary phase, with a wide range of dust exinctions. In order to extract reliable flux and colour information at any position in the galaxy, we perform a median adaptive smoothing of the images that preserves the highest possible spatial resolution. As the most practical and robust, and hence fiducial method, we express the M/L in the H band as a function of (g-i) and (i-H). Stellar mass maps computed in this way have a typical accuracy of 30 per cent or less at any given pixel, determined from the scatter in the models. We compare maps obtained with our fiducial method with those derived using other combinations of bandpasses and the old BC03 TP-AGB prescription. Finally, we compare total stellar mass estimates obtained by integrating resolved mass maps with those obtained with unresolved photometry. In galaxies with evident dust lanes, unresolved estimates may miss up to 40 per cent of the total stellar mass because dusty regions are strongly under-represented in the luminous fluxes.
description: Accepted for publication on MNRAS on Aug 10th 2009. 21 pages, 14 figures (see http://www.mpia.de/homes/zibetti/mass_maps_I.pdf for full resolution). One appendix added and minor changes done wrt to original submission
J/psi production in p-A and A-A collisions at fixed target experiments
Creators: name: Arnaldi, Roberta
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Charmonia suppression is one of the main signatures for the formation of a deconfined medium. However, also nuclear effects, not related to the production of a hot medium, can affect the J/psi yield. The determination, from the study of p-A collisions, of the J/psi behaviour in nuclear matter is, therefore, extremely important to correctly quantify the amount of charmonia suppression induced by the deconfined medium. In this paper the new NA60 results collected at 158 GeV incident energy, i.e. under the same kinematical conditions as the In-In (NA60) and Pb-Pb (NA50) data, are presented and compared with p-A measurements from other fixed target experiments. Results on A-A collisions are also reviewed taking into account the new available information on the influence of cold nuclear matter on the J/psi production yield. Finally, results on the J/psi polarization are shown for p-A and A-A collisions.
description: 8 pages, 8 figures - To appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee
Non-standard analysis
Creators: name: Cooper, Glen Russell
Publisher: name: University of British Columbia
Year: 2010

description: In this thesis some classical theorems of analysis are provided with non-standard proofs. In Chapter 1 some compactness theorems are examined. In 1.1 the monad μ(p) of any point p contained in a set X (and relative to a family H of subsets of X ) is defined. Using monads, a nonstandard characterization of compact families of subsets of X is given. In 1.2 it is shown that the monad μ(p) of any point p ε X (relative to H ) remains unchanged if H is extended to the smallest topology τ(H) on X containing H . Then, as an immediate consequence, the Alexander Subbase theorem is proved. In 1.3 monads are examined in topological products of topological spaces. Then, in 1.4 and 1.5 respectively, both Tychonoff's theorem and Alaoglu's theorem are easily proved. In Chapter 2 various extension results of Tarski and Nikodým (in the theory of Boolean algebras) are presented with rather short proofs. Also, a result about Boolean covers is proved. The techniques of non-standard analysis contained in Abraham Robinson's book (Robinson 1974) are used throughout. The remarks at the end of each chapter set forth pertinent references.
Congenital Nystagmus eye movements analysis and oculomotor system models evaluation
Creators: name: Pasquariello, Giulio <1976>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2011
Subjects: ING-INF/06 Bioingegneria elettronica e informatica

description: The term Congenital Nystagmus (Early Onset Nystagmus or Infantile Nystagmus Syndrome) refers to a pathology characterised by an involuntary movement of the eyes, which often seriously reduces a subject’s vision. Congenital Nystagmus (CN) is a specific kind of nystagmus within the wider classification of infantile nystagmus, which can be best recognized and classified by means of a combination of clinical investigations and motility analysis; in some cases, eye movement recording and analysis are indispensable for diagnosis.
However, interpretation of eye movement recordings still lacks of complete reliability; hence new analysis techniques and precise identification of concise parameters directly related to visual acuity are necessary to further support physicians’ decisions. To this aim, an index computed from eye movement recordings and related to the visual acuity of a subject is proposed in this thesis. This estimator is based on two parameters: the time spent by a subject effectively viewing a target (foveation time - Tf) and the standard deviation of eye position (SDp). Moreover, since previous studies have shown that visual acuity largely depends on SDp, a data collection pilot study was also conducted with the purpose of specifically identifying eventual slow rhythmic component in the eye position and to characterise in more detail the SDp. The results are presented in this thesis.
In addition, some oculomotor system models are reviewed and a new approach to those models, i.e. the recovery of periodic orbits of the oculomotor system in patients with CN, is tested on real patients data.
In conclusion, the results obtained within this research consent to completely and reliably characterise the slow rhythmic component sometimes present in eye position recordings of CN subjects and to better classify the different kinds of CN waveforms. Those findings can successfully support the clinicians in therapy planning and treatment outcome evaluation.
NSPT calculations in the Schrodinger Functional formalism
Creators: name: Torrero, C.
name: Bali, G. S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Within the framework of the Schrödinger Functional (SF), we outline how to combine Numerical Stochastic Perturbation Theory (NSPT) and PCAC relations to determine the two-loop contributions to the improvement coefficients $c_A$ and $c_{SW}$ for Sheikholeslami-Wohlert-Wilson fermions.
description: 7 pages. Presented at 27th International Symposium on Lattice Field Theory (Lattice 2009), Beijing, 26-31 Jul 2009