cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Induced self-energy on a static scalar charged particle in the spacetime of a global monopole with finite core
Creators: name: Barbosa, D.
name: de Freitas, U.
name: de Mello, E. R. Bezerra
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We analyze the induced self-energy and self-force on a scalar point-like charged test particle placed at rest in the spacetime of a global monopole admitting a general spherically symmetric inner structure to it. In order to develop this analysis we calculate the three-dimensional Green function associated with this physical system. We explicitly show that for points outside the monopole's core the scalar self-energy presents two distinct contributions. The first one is induced by the non-trivial topology of the global monopole considered as a point-like defect and the second is a correction induced by the non-vanishing inner structure attributed to it. For points inside the monopole, the self-energy also present a similar structure, where now the first contribution depends on the geometry of the spacetime inside. As illustrations of the general procedure adopted, two specific models, namely flower-pot and the ballpoint-pen, are considered for the region inside. For these two different situations, we were able to obtain exact expressions for the self-energies and self-forces in the regions outside and inside the global monopole.
description: 23 pages, 8 figures. Some minor corrections added. New references added. Paper accepted for publication in Classical and Quantum Gravity
The semantics of roots determines argument structure
Creators: name: Ausensi, Josep
Publisher: name: Proceedings of Sinn und Bedeutung
Year: 2021

description: A challenge for theories of argument structure that take verb meanings to decompose into so-called roots and event templates (Rappaport Hovav and Levin, 1998; Ramchand, 2008; Alexiadou et al., 2015, i.a.) relates to successfully accounting for the distribution of roots, as not all roots seem to appear in the same syntactic contexts. In this respect, an inﬂuential approach holds that roots are indifferent to syntactic distribution, and therefore that in principle any root can appear in any context (Borer, 2005, 2013; Mateu and Acedo-Matell´an, 2012; Acedo-Matell´an and Mateu, 2014). Another inﬂuential approach on the other hand classiﬁes roots into semantic classes constraining the syntactic contexts roots can appear in (Marantz, 1997; Harley and Noyer, 2000; Reinhart, 2002; Alexiadou et al., 2006; Ramchand, 2008). Here, I show that the two main approaches to argument structure either undergenerate (Rappaport Hovav and Levin, 1998; Alexiadou et al., 2015) or overgenerate (Borer, 2005; Acedo-Matell´an and Mateu, 2014). In particular, I provide empirical data that show that so-called result verbs enjoy a certain degree of elasticity, contra Rappaport Hovav and Levin (1998); Alexiadou et al.(2015), yet there are cases of lack of verbal elasticity, contra Borer (2005); Acedo-Matell´an and Mateu (2014), i.a. To this end, I propose a root-sensitive approach to event structure in which the semantics of distinct classes of roots can determine the syntactic contexts roots can appear in. Under the present approach, cases of ungrammaticality are argued to result from clashes between the semantics of roots and the semantics of the event structure.
description: Proceedings of Sinn und Bedeutung, Vol 25 (2021): Proceedings of Sinn und Bedeutung 25
Conveying content questions without wh-words: evidence from Abaza
Creators: name: Arkadiev, Peter
name: Caponigro, Ivano
Publisher: name: Proceedings of Sinn und Bedeutung
Year: 2021

description: We argue that Abaza, a polysynthetic language from the Northwest Caucasian family, exhibits a syntax-semantics mapping that has not been observed in any other languages before. We show that Abaza lacks wh-words and, as a consequence, matrix and embedded wh- interrogative clauses, and conveys direct and indirect content question meaning by means of headless relative clauses. We propose a compositional semantic analysis of these headless relative clauses that assigns them the same meaning as concealed question DPs, i.e. individual concepts. When occurring as matrix clauses and conveying direct question meaning, these headless relative clauses require the relative verbal form to contain a clause typing affix from a specific set. We show that these affixes cannot be analyzed as “incorporated” or “cliticized” wh- words, but rather as operators turning individual concepts into questions, i.e., sets of propositions.
description: Proceedings of Sinn und Bedeutung, Vol 25 (2021): Proceedings of Sinn und Bedeutung 25
A constraint on co-occurrence of partitive quantiﬁers and gradable predicates
Creators: name: Amiraz, Omri
Publisher: name: Proceedings of Sinn und Bedeutung
Year: 2021

description: Quantiﬁers like most of are compatible with some predicates but not others, e.g., Most of the road is {narrow / #long}. In the context of collective predicates, this is known as the gather/numerous distinction. This paper focuses on gradable predicates—both singular and collective—and argues that only non-monotonic gradable predicates are compatible with quantiﬁers like most of. I show that if a monotonic predicate co-occurs with such a quantiﬁer, the sentence does not have well-deﬁned truth conditions, which makes it unacceptable.
description: Proceedings of Sinn und Bedeutung, Vol 25 (2021): Proceedings of Sinn und Bedeutung 25
Atomic Interactions in Precision Interferometry Using Bose-Einstein Condensates
Creators: name: Jamison, Alan O.
name: Kutz, J. Nathan
name: Gupta, Subhadeep
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present theoretical tools for predicting and reducing the effects of atomic interactions in Bose-Einstein condensate (BEC) interferometry experiments. To address mean-field shifts during free propagation, we derive a robust scaling solution that reduces the three-dimensional Gross-Pitaevskii equation to a set of three simple differential equations valid for any interaction strength. To model the other common components of a BEC interferometer---condensate splitting, manipulation, and recombination---we generalize the slowly-varying envelope reduction, providing both analytic handles and dramatically improved simulations. Applying these tools to a BEC interferometer to measure the fine structure constant (Gupta, et al., 2002), we find agreement with the results of the original experiment and demonstrate that atomic interactions do not preclude measurement to better than part-per-billion accuracy, even for atomic species with relatively large scattering lengths. These tools help make BEC interferometry a viable choice for a broad class of precision measurements.
description: 8 pages, 6 figures, revised based on reviewer comments
Remarks on disjunctive focus-associates
Creators: name: Alxatib, Sam
Publisher: name: Proceedings of Sinn und Bedeutung
Year: 2021

description: This paper concerns similarities and differences between the implicatures of dis-junction — modalized disjunction speciﬁcally — and the implicatures of other scalar terms like some. The two inference types are compared with special attention to their behavior under association with only, where they are shown to come apart. I argue that disjunct alternatives (p,q) to a disjunctive associate of only ([p or q]) do not feed the semantics of the particle. The signiﬁcance of the claim is discussed in connection to (a) semantic and implicature-based accounts of free choice inferences, and (b) the phenomenon of presupposed implicatures.
description: Proceedings of Sinn und Bedeutung, Vol 25 (2021): Proceedings of Sinn und Bedeutung 25
Quantum entanglement in multiparticle systems of two-level atoms
Creators: name: Deb, Ram Narayan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose the necessary and sufficient condition for the presence of quantum entanglement in arbitrary symmetric pure states of two-level atomic systems. We introduce a parameter to quantify quantum entanglement in such systems. We express the inherent quantum fluctuations of a composite system of two-level atoms as a sum of the quantum fluctuations of the individual constituent atoms and their correlation terms. This helps to separate out and study solely the quantum correlations among the atoms and obtain the criterion for the presence of entanglement in such multiatomic systems.
description: 18 pages: Typos have been corrected and some of the references have been modified. Updated to the journal version
Addendum to: Implications of the measurements of B_s-B_s bar mixing on SUSY models
Creators: name: Ko, P.
name: Park, Jae-hyeon
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This is an addendum to the previous publication, P. Ko and J.-h. Park, Phys. Rev. D80, 035019 (2009). The semileptonic charge asymmetry in B_s decays is discussed in the context of general MSSM with gluino-mediated flavor and CP violation in light of the recent measurements at the Tevatron.
description: 4 pages, 2 figures, addendum to arXiv:0809.0705, published version
RI'/SMOM scheme amplitudes for deep inelastic scattering operators at one loop in QCD
Creators: name: Gracey, J. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We compute the amplitudes for the insertion of various operators in a quark 2-point function at one loop in the RI' symmetric momentum scheme, RI'/SMOM. Specifically we focus on the moments n = 2 and 3 of the flavour non-singlet twist-2 operators used in deep inelastic scattering as these are required for lattice computations.
description: 27 latex pages, 1 figure, inconsistency in vector current renormalization and the corresponding W_2 and W_3 parts corrected as well as several typos
If pictures are stative, what does this mean for discourse interpretation?
Creators: name: Altshuler, Daniel
name: Schlöder, Julian
Publisher: name: Proceedings of Sinn und Bedeutung
Year: 2021

description: The goal of this paper is to explore the consequences of adopting Abusch (2014)’s hypothesis about pictures—that they are stative depictions of the world—for the interpreta-tion of discourses. We focus on the phenomenon of narrative progression and reject Abusch’s proposal that aspectual differences between linguistic and pictorial narrative do not factor in providing a uniform analysis across media. Based on eventive-stative sequences in linguistic narrative, we develop a new answer within Segmented Discourse Representation Theory. We state a single pragmatic algorithm that exploits the aspectual differences between linguistic and pictorial narratives to derive the correct predictions.
description: Proceedings of Sinn und Bedeutung, Vol 25 (2021): Proceedings of Sinn und Bedeutung 25
Remarks on two approaches to NPI licensing
Creators: name: Crnič, Luka
Publisher: name: Proceedings of Sinn und Bedeutung
Year: 2021

description: In relation to the notion of informativity, two types of approaches to DPs headed by any (any-DPs) have been distinguished. At a ﬁrst approximation, one approach takes an any-DP to be accompanied by a requirement that a clause containing it be more informative than all its relevant alternatives (cf. Kadmon & Landman 1993), while the other approach requires a clause containing it to be more informative than all its relevant alternatives that are true (cf. Chierchia 2013). The goal of this paper is to compare these approaches with respect to their predictions about the distribution of plural any-DPs in modal environments.
description: Proceedings of Sinn und Bedeutung, Vol 25 (2021): Proceedings of Sinn und Bedeutung 25
Modalized normality in pictorial narratives
Creators: name: Abusch, Dorit
name: Rooth, Mats
Publisher: name: Proceedings of Sinn und Bedeutung
Year: 2021

description: An analysis of pictorial free perception using universal quantiﬁcation over worlds that are consistent with the embedded picture is incorrect, because it entails that depicted characters pick up all of the information in a scene they look at. Human agents typically do not. This is corrected by replacing universal quantiﬁcation over epistemic alternatives with existential quantiﬁcation, and by introducing a normality condition.
description: Proceedings of Sinn und Bedeutung, Vol 25 (2021): Proceedings of Sinn und Bedeutung 25
Testing the Bimodal/Schizophrenic Neutrino Hypothesis in Neutrinoless Double Beta Decay and Neutrino Telescopes
Creators: name: Barry, James
name: Mohapatra, Rabindra N.
name: Rodejohann, Werner
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The standard assumption is that all three neutrino mass states are either Dirac or Majorana. However, it was recently suggested by Allaverdi, Dutta and one of the authors (R.N.M.) that mixed, or bimodal, flavor neutrino scenarios are conceivable and are consistent with all known observations (these were called "schizophrenic" in the ADM paper). In that case each individual mass eigenstate can be either Dirac or Majorana, so that the flavor eigenstates are "large" admixtures of both. An example of this "bimodal" situation is to consider one mass state as a Dirac particle (with a sterile partner), while the other two are of Majorana type. Since only Majorana particles contribute to neutrinoless double beta decay, the usual dependence of this observable on the neutrino mass is modified within this scenario. We study this in detail and, in particular, generalize the idea for all possible bimodal combinations. Inevitably, radiative corrections will induce a pseudo-Dirac nature to the Dirac states at the one-loop level, and the effects of the pseudo-Dirac mass splitting will show up in the flavor ratios of neutrinos from distant cosmological sources. Comparison of the effective mass in neutrinoless double beta decay as well as flavor ratios at neutrino telescopes, for different pseudo-Dirac cases and with their usual phenomenology, can distinguish the different bimodal possibilities.
description: 17 pages, 6 figures. v2: References added, minor corrections/additions; matches published version
A multi-string photovoltaic inverter for thin-film or back-side contacted solar modules
Creators: name: Gommeringer, Mario
name: Schmitt, Alexander
name: Braun, Michael
Publisher: name: Karlsruhe
Year: 2016
Subjects: Photovoltaics
MPP tracking
DC-AC converter
3-level inverter

description: Photovoltaic inverters are widely used to feed solar generated power into the public grid. Inverter topologies have to be carefully chosen, depending on the type and on the power of the solar generator. A new transformerless, three-level photovoltaic inverter circuit for multiple strings is investigated in this paper. It allows an individual MPP tracking of each string without needing a full scale boost converter for each input. Furthermore, either the positive poles or the negative poles of the strings can be connected to the neutral conductor N. Therefore, the topology is especially suited for thin-film or back-side contacted solar modules.
Orbiting Circum-galactic Gas as a Signature of Cosmological Accretion
Creators: name: Stewart, Kyle R.
name: Kaufmann, Tobias
name: Bullock, James S.
name: Barton, Elizabeth J.
name: Maller, Ariyeh H.
name: Diemand, Jürg
name: Wadsley, James
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use cosmological SPH simulations to study the kinematic signatures of cool gas accretion onto a pair of well-resolved galaxy halos. Cold-flow streams and gas-rich mergers produce a circum-galactic component of cool gas that generally orbits with high angular momentum about the galaxy halo before falling in to build the disk. This signature of cosmological accretion should be observable using background-object absorption line studies as features that are offset from the galaxy's systemic velocity by ~100 km/s. Accreted gas typically co-rotates with the central disk in the form of a warped, extended cold flow disk, such that the observed velocity offset is in the same direction as galaxy rotation, appearing in sight lines that avoid the galactic poles. This prediction provides a means to observationally distinguish accreted gas from outflow gas: the accreted gas will show large one-sided velocity offsets in absorption line studies while radial/bi-conical outflows will not (except possibly in special polar projections). This rotation signature has already been seen in studies of intermediate redshift galaxy-absorber pairs; we suggest that these observations may be among the first to provide indirect observational evidence for cold accretion onto galactic halos. Cold mode halo gas typically has ~3-5 times more specific angular momentum than the dark matter. The associated cold mode disk configurations are likely related to extended HI/XUV disks seen around galaxies in the local universe. The fraction of galaxies with extended cold flow disks and associated offset absorption-line gas should decrease around bright galaxies at low redshift, as cold mode accretion dies out.
description: 15 pages, 9 figures, edited to match published version. Includes expanded discussion, with primary results unchanged
Development of dual replaceable-link eccentrically braced frames using equivalent energy based design procedure
Creators: name: Neitsch, Jesse Eric Edward
Publisher: name: University of British Columbia
Year: 2017

description: Conventional seismic force resisting systems (SFRSs) rely on the use of ductile design philosophy, where structural components are designed to undergo large inelastic deformations to dissipate the sudden surge of the earthquake energy. This design philosophy has shown to be very effective in preventing structural collapse. However, the extensive inelastic deformation usually leads to significant damage to the structural and non-structural components. Many earthquake reconnaissance reports show that this design philosophy typically leads to hefty financial losses. Eccentrically Braced Frames (EBFs) have been proven through testing and earthquakes to exhibit a high level of ductile behaviour. However, the damage of the link leads to hefty repair costs, which lead to the Replaceable-Link Eccentrically Braced Frame (REBF). A well-tuned link can control the response of the REBF, which provides the advantage for the REBF over an EBF. While the link is designed to yield, and deform, the rest of the REBF and gravity system are designed to remain elastic. This mechanism makes the link act as a fuse in the REBF system, which allows the structure to be more resilient towards earthquakes. In this study, a novel seismic design methodology named the Equivalent Energy-Based Design Procedure (EEDP) was implemented for the seismic design of two REBFs operating in parallel, which is referred to as the Dual REBF (DREBF) system. The conventional Equivalent Static Force Procedure (ESFP) was also used to achieve an alternate, comparative model. The designs and the design procedures themselves were compared to highlight potential benefits of designing from an energy based perspective. EEDP allows the designers to select different performance objectives at different shaking intensities, where the structure can be designed to achieve these objectives using simple hand calculations. More importantly, the design can be achieved without iteration. This study demonstrated that the design procedure of one simple prototype building utilizing both the ESFP and EEDP philosophies. Their seismic responses have been analyzed using detailed numerical models developed using OpenSees. The results of the nonlinear dynamic analysis showed that the EEDP designed DREBF can achieve the target performance defined by the designer at different shaking intensities.
Constraints on the Mass and Radius of the Neutron Star XTE J1807-294
Creators: name: Leahy, Denis A.
name: Morsink, Sharon M.
name: Chou, Yi
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The accreting millisecond pulsar XTE J1807-294 is studied through a pulse shape modeling analysis. The model includes blackbody and Comptonized emission from the one visible hot spot and makes use of the Oblate Schwarzschild approximation for ray-tracing. We include a scattered light contribution, which accounts for flux scattered off an equatorial accretion disk to the observer including time delays in the scattered light. We give limits to mass and radius for XTE J1807-294 and compare to limits determined for SAX J1808-3658 and XTE J1814-334 previously determined using similar methods. The resulting allowed region for mass-radius curves is small but is consistent with a mass-radius relation with nearly constant radius (~12 km) for masses between 1 and 2.5 solar masses.
description: 7 pages, 5 figures
Oeljeklaus-Toma manifolds admitting no complex subvarieties
Creators: name: Ornea, Liviu
name: Verbitsky, Misha
Publisher: name: arXiv
Year: 2010
Subjects: subject: Complex Variables (math.CV)
subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C55

description: The Oeljeklaus-Toma (OT-) manifolds are complex manifolds constructed by Oeljeklaus and Toma from certain number fields, and generalizing the Inoue surfaces $S_m$. On each OT-manifold we construct a holomorphic line bundle with semipositive curvature form and trivial Chern class. Using this form, we prove that the OT-manifolds admitting a locally conformally Kahler structure have no non-trivial complex subvarieties. The proof is based on the Strong Approximation theorem for number fields, which implies that any leaf of the null-foliation of w is Zariski dense.
description: 11 pages; no changes from the previous submission, which was the same file submitted twice by an error
Some Considerations concerning the Fluctuation of the Ratios of two Observables
Creators: name: Hauer, Michael
name: Vogel, Sascha
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss several possible caveats which arise with the interpretation of measurements of fluctuations in heavy ion collisions. We especially focus on the ratios of particle yields, which has been advocated as a possible signature of a critical point in the QCD phase diagram. We conclude that current experimental observables are not well-defined and are without a proper quantitative meaning.
description: 10 pages, 5 figures, updated version as accepted for publication in Physical Review C
Theoretical study of Acousto-optical coherence tomography using random phase jumps on US and light
Creators: name: Lesaffre, Max
name: Farahi, Salma
name: Boccara, A. C.
name: Ramaz, François
name: Gross, Michel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Acousto-Optical Coherence Tomography (AOCT) is variant of Acousto Optic Imaging (called also ultrasonic modulation imaging) that makes possible to get z resolution with acoustic and optic Continuous Wave (CW) beams. We describe here theoretically the AOCT e ect, and we show that the Acousto Optic tagged photons remains coherent if they are generated within a speci c z region of the sample. We quantify the z selectivity for both the tagged photon eld, and for the M. Lesa re et al. photorefractive signal.
Fermion Masses in Emergent Electroweak Symmetry Breaking
Creators: name: Cui, Yanou
name: Gherghetta, Tony
name: Stokes, James
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the generation of fermion masses in an emergent model of electroweak symmetry breaking with composite $W,Z$ gauge bosons. A universal bulk fermion profile in a warped extra dimension is used for all fermion flavors. Electroweak symmetry is broken at the UV (or Planck) scale where boundary mass terms are added to generate the fermion flavor structure. This leads to flavor-dependent nonuniversality in the gauge couplings. The effects are suppressed for the light fermion generations but are enhanced for the top quark where the $Zt{\bar t}$ and $Wt{\bar b}$ couplings can deviate at the $10-20%$ level in the minimal setup. By the AdS/CFT correspondence our model implies that electroweak symmetry is not a fundamental gauge symmetry. Instead the Standard Model with massive fermions and $W,Z$ gauge bosons is an effective chiral Lagrangian for some underlying confining strong dynamics at the TeV scale, where mass is generated without a Higgs mechanism.
description: modified discussion in Sec 3.1, version published in JHEP
Search complexity and resource scaling for the quantum optimal control of unitary transformations
Creators: name: Moore, Katharine W.
name: Chakrabarti, Raj
name: Riviello, Gregory
name: Rabitz, Herschel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The optimal control of unitary transformations is a fundamental problem in quantum control theory and quantum information processing. The feasibility of performing such optimizations is determined by the computational and control resources required, particularly for systems with large Hilbert spaces. Prior work on unitary transformation control indicates that (i) for controllable systems, local extrema in the search landscape for optimal control of quantum gates have null measure, facilitating the convergence of local search algorithms; but (ii) the required time for convergence to optimal controls can scale exponentially with Hilbert space dimension. Depending on the control system Hamiltonian, the landscape structure and scaling may vary. This work introduces methods for quantifying Hamiltonian-dependent and kinematic effects on control optimization dynamics in order to classify quantum systems according to the search effort and control resources required to implement arbitrary unitary transformations.
A Stochastic Model for the Luminosity Fluctuations of Accreting Black Holes
Creators: name: Kelly, Brandon C.
name: Sobolewska, Malgorzata
name: Siemiginowska, Aneta
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this work we have developed a new stochastic model for the fluctuations in lightcurves of accreting black holes. The model is based on a linear combination of stochastic processes and is also the solution to the linear diffusion equation perturbed by a spatially correlated noise field. This allows flexible modeling of the power spectral density (PSD), and we derive the likelihood function for the process, enabling one to estimate the parameters of the process, including break frequencies in the PSD. Our statistical technique is computationally efficient, unbiased by aliasing and red noise leak, and fully accounts for irregular sampling and measurement errors. We show that our stochastic model provides a good approximation to the X-ray lightcurves of galactic black holes, and the optical and X-ray lightcurves of AGN. We use the estimated time scales of our stochastic model to recover the correlation between characteristic time scale of the high frequency X-ray fluctuations and black hole mass for AGN, including two new `detections' of the time scale for Fairall 9 and NGC 5548. We find a tight anti-correlation between the black hole mass and the amplitude of the driving noise field, which is proportional to the amplitude of the high frequency X-ray PSD, and we estimate that this parameter gives black hole mass estimates to within ~ 0.2 dex precision, potentially the most accurate method for AGN yet. We also find evidence that ~ 13% of AGN optical PSDs fall off flatter than 1 / f^2, and, similar to previous work, find that the optical fluctuations are more suppressed on short time scales compared to the X-rays, but are larger on long time scales, suggesting the optical fluctuations are not solely due to reprocessing of X-rays.
description: 22 pages, 10 figures, resubmitted to match accepted version, in press at ApJ
title: Tempora mutantur, immer gleich aber doch anders?
title: Die Geschichte der Kommission für Aus- und Fortbildung
titleType: Subtitle
Creators: name: Pum, Gabriele
Publisher: name: Universität Graz
Year: 2021

description: 75 Jahre VÖB. 1946–2021, Hg. v. Alker-Windbichler, Bauer und Köstner-Pemsel, 2021, S. 285–307
description: Die Geschichte der Kommission für Aus- und Fortbildung ist auf das Engste mit der Entwicklung
des wissenschaftlichen Bibliothekswesens in Österreich verbunden. Bis 2004 lag nicht nur
die Konzeption der methodischen Gestaltung der Ausbildungsvorschriften für die wissenschaftlichen
Bibliothekar*innen in Österreich in ihrer Hand, sondern es fand auch der kontinuierliche
Anpassungsprozess an die technologischen Gegebenheiten statt, um die inhaltlichen sowie auch
die mittel- und langfristigen Entwicklungen des nationalen und internationalen Informationssektors
zu berücksichtigen. Sie bildet darüber hinaus für alle am Aus- und Fortbildungsgeschehen
Interessierte und allen Stakeholdern der nationalen verwandten Ausbildungsschienen ein
Gesprächsforum.
description: VÖB, Kommission für Aus- und Fortbildung, Österreich, Bibliotheksausbildung,
Fortbildung
description: The history of the Commission for Training and Further Education is closely connected with
the development of academic librarianship in Austria. Until 2004, it was not only responsible
for the conception of the methodological design of the training guidelines for academic librarians
in Austria, but also for the continuous adaptation process to the technological conditions in
order to take into account the medium and long-term developments in the national and international
information sector. In addition, it represents a discussion forum for all those interested
in education and training and all stakeholders of the national related training tracks.
description: Commission for Training and Further Education, Austria, further training, Association of Austrian Librarians
Degenerate Quasicrystal of Hard Triangular Bipyramids
Creators: name: Haji-Akbari, Amir
name: Engel, Michael
name: Glotzer, Sharon C
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We report a degenerate quasicrystal in Monte Carlo simulations of hard triangular bipyramids each composed of two regular tetrahedra sharing a single face. The dodecagonal quasicrystal is similar to that recently reported for hard tetrahedra [Haji-Akbari et al., Nature (London) 462, 773 (2009)] but degenerate in the pairing of tetrahedra, and self-assembles at packing fractions above 54%. This notion of degeneracy differs from the degeneracy of a quasiperiodic random tiling arising through phason flips. Free energy calculations show that a triclinic crystal is preferred at high packing fractions.
description: 5 pages, 5 figures, includes four additional pages of supplementary information
On strongly summable ultrafilters
Creators: name: Krautzberger, Peter
Publisher: name: arXiv
Year: 2010
Subjects: subject: Logic (math.LO)
subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 03E75 (Primary) 54D80, 05D10 (Secondary)

description: We present some new results on strongly summable ultrafilters. As the main result, we extend a theorem by N. Hindman and D. Strauss on writing strongly summable ultrafilters as sums.
Protoplanetary Disks and Their Evolution
Creators: name: Williams, Jonathan P.
name: Cieza, Lucas A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Flattened, rotating disks of cool dust and gas extending for tens to hundreds of AU are found around almost all low mass stars shortly after their birth. These disks generally persist for several Myr, during which time some material accretes onto the star, some is lost through outflows and photoevaporation, and some condenses into centimeter- and larger-sized bodies or planetesimals. Through observations mainly at infrared through millimeter wavelengths, we can determine how common disks are at different ages, measure basic properties including mass, size, structure, and composition, and follow their varied evolutionary pathways. In this way, we see the first steps toward exoplanet formation and learn about the origins of the Solar System. This review addresses observations of the outer parts, beyond 1 AU, of protoplanetary disks with a focus on recent infrared and (sub-)millimeter results and an eye to the promise of new facilities in the immediate future.
description: 65 pages, 11 figures, published in volume 49 of the Annual Review of Astronomy and Astrophysics, based on the available literature up to the end of 2010. We recommend that you retrieve the published paper from Annual Reviews for greatly improved figures and typesetting
Phase Diagram of Hard Tetrahedra
Creators: name: Haji-Akbari, Amir
name: Engel, Michael
name: Glotzer, Sharon C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Advancements in the synthesis of faceted nanoparticles and colloids have spurred interest in the phase behavior of polyhedral shapes. Regular tetrahedra have attracted particular attention because they prefer local symmetries that are incompatible with periodicity. Two dense phases of regular tetrahedra have been reported recently. The densest known tetrahedron packing is achieved in a crystal of triangular bipyramids (dimers) with packing density 4000/4671=85.63%. In simulation a dodecagonal quasicrystal is observed; its approximant, with periodic tiling (3.4.3^2.4), can be compressed to a packing fraction of 85.03%. Here, we show that the quasicrystal approximant is more stable than the dimer crystal for packing densities below 84% using Monte Carlo computer simulations and free energy calculations. To carry out the free energy calculations, we use a variation of the Frenkel-Ladd method for anisotropic shapes and thermodynamic integration. The enhanced stability of the approximant can be attributed to a network substructure, which maximizes the free volume (and hence the 'wiggle room') available to the particles and facilitates correlated motion of particles, which further contributes to entropy and leads to diffusion for packing densities below 65%. The existence of a solid-solid transition between structurally distinct phases not related by symmetry breaking -- the approximant and the dimer crystal-- is unusual for hard particle systems.
description: 11 pages, 10 figures, contains corrections to equation (8) and related corrections/updates
The Tertiary Quartzite Artifacts from Heidesheim-Höllenberg: The First Federmesser Assemblage Between the Rhine and Nahe Rivers?
Creators: name: Anderson, Mark
Publisher: name: figshare
Year: 2021
Subjects: Archaeology

description: A (fairly) recent map showing the location of Federmesser sites in the Rhineland (Bosinski 2008: figure 371) suggests that the entire Mainz Basin west of the Rhine River is devoid of such sites. As Federmesser assemblages have, however, been found in the neighboring Lower Main region to the east of the Rhine (Terberger 2002: 41, figures 8; 15), it seemed just a matter of time before a corresponding assemblage was discovered to the west of it (Terberger 2003: 69). The open-air site of Heidesheim-Höllenberg near Mainz, Germany has yielded a small assemblage of diminutive lithic artifacts made primarily of Tertiary quartzite. This paper describes the assemblage and attempts to place it within the Federmesser tradition.
Complementary contributions of indeterminism and signalling to quantum correlations
Creators: name: Hall, Michael J. W.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Simple quantitative measures of indeterminism and signalling, $I$ and $S$, are defined for models of statistical correlations. It is shown that any such model satisfies a generalised Bell-type inequality, with tight upper bound B(I,S). This upper bound explicitly quantifies the complementary contributions required from indeterminism and signalling, for modelling any given violation of the standard Bell-CHSH inequality. For example, all models of the maximum quantum violation must either assign no more than 80% probability of occurrence to some underlying event, and/or allow a nonlocal change of at least 60% in an underlying marginal probability of one observer in response to a change in measurement setting by a distant observer. The results yield a corresponding complementarity relation between the numbers of local random bits and nonlocal signalling bits required to model a given violation. A stronger relation is conjectured for simulations of singlet states. Signalling appears to be a useful resource only if a `gap' condition is satisfied, corresponding to being able to nonlocally flip some underlying marginal probability $p$ to its complementary value 1-p.
description: 5.1 pages, restructured with expanded information-theoretic discussion and links to communication models, several refs added, to appear in PRA
Stationary waves in a superfluid exciton gas in quantum Hall bilayers
Creators: name: Pikalov, A. A.
name: Fil, D. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Stationary waves in a superfluid magnetoexciton gas in nu = 1 quantum Hall bilayers are considered. The waves are induced by counter-propagating electrical currents that flow in a system with a point obstacle. It is shown that stationary waves can emerge only in imbalanced bilayers in a certain diapason of currents. It is found that the stationary wave pattern is modified qualitatively under a variation of the ratio of the interlayer distance to the magnetic length d/l. The advantages of use graphene-dielectric-graphene sandwiches for the observation of stationary waves are discussed. We determine the range of parameters (the dielectric constant of the layer that separates two graphene layers and the ratio d/l) for which the state with superfluid magnetoexcitons can be realized in such sandwiches. Typical stationary wave patterns are presented as density plots
description: 17 pages, 8 figures
New views on the ingenious applications of Ag nanoparticles as a sensor for antibiotic detection and as a potent antimicrobial agent: A Review
Creators: name: KONGOR, Anita
Publisher: name: Metallurgy and Materials Science Research Institute Chulalongkorn University
Year: 2021
Subjects: Silver nanoparticles
Sensor
Antibiotic
Bacterial infections
Therapeutic agent

description: Journal of Metals, Materials and Minerals, 31, 3, 1-9
title: Влияние дистанционного обучения на успеваемость студентов
Creators: name: Зуева, Екатерина
name: Виноградова, Ольга
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: Пандемия COVID-19 нарушила ход течения повседневной жизни всех людей на планете. Кризис, вызванный новым опасным коронавирусом, потребовал экстренных мер для снижения рисков распространения инфекции в разных сферах жизни и деятельности людей. В сфере образования в качестве такой меры был выбран экстренный перевод учебного процесса в дистанционную форму с применением технологий электронного обучения. Чтобы не отстать от программы, все они должны были продолжать обучение даже после закрытия
учреждений, быстро переключившись с традиционного офлайн формата на новые форматы. Потрясение, которое испытала система образования из-за COVID-19, беспрецедентно. Оно обратило вспять достижение международных целей в области образования и в непропорционально большей степени затронуло менее состоятельные и более уязвимые группы населения. Исходя из социологического опроса, образовательное сообщество продемонстрировало свою стойкость и заложило основу для дальнейшего восстановления.
Fidelity decay for local perturbations: microwave evidence for oscillating decay exponents
Creators: name: Köber, Bernd
name: Kuhl, Ulrich
name: Stöckmann, Hans-Jürgen
name: Goussev, Arseni
name: Richter, Klaus
Publisher: name: arXiv
Year: 2010
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study fidelity decay in classically chaotic microwave billiards for a local, piston-like boundary perturbation. We experimentally verify a predicted non-monotonic cross-over from the Fermi Golden Rule to the escape-rate regime of the Loschmidt echo decay with increasing local boundary perturbation. In particular, we observe pronounced oscillations of the decay rate as a function of the piston position which quantitatively agree with corresponding theoretical results based on a refined semiclassical approach for local boundary perturbations.
description: 6 pages, 8 figures
GW approximations and vertex corrections on the Keldysh time-loop contour: application for model systems at equilibrium
Creators: name: Ness, H.
name: Dash, L. K.
name: Stankovski, M.
name: Godby, R. W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We provide the formal extension of Hedin's GW equations for single-particle Green's functions with electron-electron interaction onto the Keldysh time-loop contour. We show an application of our formalism to the plasmon model of a core electron within the plasmon-pole approximation. We study in detail the diagrammatic perturbation expansion of the core-electron/plasmon coupling on the spectral functions of the so-called S-model which provides an exact solution, concentrating especially on the effects of self-consistency and vertex corrections on the GW self-energy. For the S-model, self-consistency is essential for GW-like calculations to obtain the full spectral information. The second- order exchange diagram (i.e. a vertex correction) is crucial to obtain a better spectral description of the plasmon peak and side-band peaks in comparison to GW-like calculations. However, the vertex corrections are well reproduced within a non-self-consistent calculation. We also consider conventional equilibrium GW calculations for the pure jellium model. We find that with no second-order vertex correction, we cannot obtain the full set of plasmon side-band peaks. Finally, we address the issues of formal connection for the Dyson equations of the time-ordered Green's function and the Keldysh Green's functions at equilibrium in the cases of zero and finite temperature.
description: Published in PRB November 22 2011
Extraction of cellulose nanofibers from empty palm fruit bunches via mechanical defibrillation
Creators: name: TAN, Zi-Qian
Publisher: name: Metallurgy and Materials Science Research Institute Chulalongkorn University
Year: 2021
Subjects: Cellulose nanofibers
Empty palm fruit bunches
Mechanical defibrillation
High-pressure homogenization

description: Journal of Metals, Materials and Minerals, 31, 3, 10-19
Eigenstate Randomization Hypothesis: Why Does the Long-Time Average Equal the Microcanonical Average?
Creators: name: Ikeda, Tatsuhiko N.
name: Watanabe, Yu
name: Ueda, Masahito
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We derive an upper bound on the difference between the long-time average and the microcanonical ensemble average of observables in isolated quantum systems. We propose, numerically verify, and analytically support a new hypothesis, eigenstate randomization hypothesis (ERH), which implies that in the energy eigenbasis the diagonal elements of observables fluctuate randomly. We show that ERH includes eigenstate thermalization hypothesis (ETH) and makes the aforementioned bound vanishingly small. Moreover, ERH is applicable to integrable systems for which ETH breaks down. We argue that the range of the validity of ERH determines that of the microcanonical description.
description: manuscript including 4 pages and 3 figures
Entanglement criteria for microscopic-macroscopic systems
Creators: name: Spagnolo, Nicolo'
name: Vitelli, Chiara
name: Sciarrino, Fabio
name: De Martini, Francesco
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We discuss the conclusions that can be drawn on a recent experimental micro-macro entanglement test [F. De Martini, F. Sciarrino, and C. Vitelli, Phys. Rev. Lett. 100, 253601 (2008). The system under investigation is generated through optical parametric amplification of one photon belonging to an entangled pair. The adopted entanglement criterion makes it possible to infer the presence of entanglement before losses, that occur on the macrostate, under a specific assumption. In particular, an a priori knowledge of the system that generates the micro-macro pair is necessary to exclude a class of separable states that can reproduce the obtained experimental results. Finally, we discuss the feasibility of a micro-macro "genuine" entanglement test on the analyzed system by considering different strategies, which show that in principle a fraction epsilon, proportional to the number of photons that survive the lossy process, of the original entanglement persists in any losses regime.
description: 11 pages, 10 figures