cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A limit for large $R$-charge correlators in $\mathcal{N}=2$ theories
Creators: name: Bourget, Antoine
name: Rodriguez-Gomez, Diego
name: Russo, Jorge G.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using supersymmetric localization, we study the sector of chiral primary operators $({\rm Tr} \, ϕ^2 )^n$ with large $R$-charge $4n$ in $\mathcal{N}=2$ four-dimensional superconformal theories in the weak coupling regime $g\rightarrow 0$, where $λ\equiv g^2n$ is kept fixed as $n\to\infty $, $g$ representing the gauge theory coupling(s). In this limit, correlation functions $G_{2n}$ of these operators behave in a simple way, with an asymptotic behavior of the form $G_{2n}\approx F_{\infty}(λ) \left(\fracλ{2πe}\right)^{2n}\ n^α$, modulo $O(1/n)$ corrections, with $α=\frac{1}{2} \mathrm{dim}(\mathfrak{g})$ for a gauge algebra $\mathfrak{g}$ and a universal function $F_{\infty}(λ)$. As a by-product we find several new formulas both for the partition function as well as for perturbative correlators in ${\cal N}=2$ $\mathfrak{su}(N)$ gauge theory with $2N$ fundamental hypermultiplets.
Coverage of highly-cited documents in Google Scholar, Web of Science, and Scopus: a multidisciplinary comparison
Creators: name: Martín-Martín, Alberto
name: Orduna-Malea, Enrique
name: López-Cózar, Emilio Delgado
Publisher: name: arXiv
Year: 2018
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: This study explores the extent to which bibliometric indicators based on counts of highly-cited documents could be affected by the choice of data source. The initial hypothesis is that databases that rely on journal selection criteria for their document coverage may not necessarily provide an accurate representation of highly-cited documents across all subject areas, while inclusive databases, which give each document the chance to stand on its own merits, might be better suited to identify highly-cited documents. To test this hypothesis, an analysis of 2,515 highly-cited documents published in 2006 that Google Scholar displays in its Classic Papers product is carried out at the level of broad subject categories, checking whether these documents are also covered in Web of Science and Scopus, and whether the citation counts offered by the different sources are similar. The results show that a large fraction of highly-cited documents in the Social Sciences and Humanities (8.6%-28.2%) are invisible to Web of Science and Scopus. In the Natural, Life, and Health Sciences the proportion of missing highly-cited documents in Web of Science and Scopus is much lower. Furthermore, in all areas, Spearman correlation coefficients of citation counts in Google Scholar, as compared to Web of Science and Scopus citation counts, are remarkably strong (.83-.99). The main conclusion is that the data about highly-cited documents available in the inclusive database Google Scholar does indeed reveal significant coverage deficiencies in Web of Science and Scopus in several areas of research. Therefore, using these selective databases to compute bibliometric indicators based on counts of highly-cited documents might produce biased assessments in poorly covered areas.
description: 11 pages, 3 tables, 1 figure. Accepted for publication in Scientometrics
Simple mechanisms that impede the Berry phase identification from magneto-oscillations
Creators: name: Kuntsevich, A. Yu.
name: Shupletsov, A. V.
name: Minkov, G. M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The phase of quantum magneto-oscillations is often associated with the Berry phase and is widely used to argue in favor of topological nontriviality of the system (Berry phase $2πn+π$). Nevertheless, the experimentally determined value may deviate from $2πn+π$ arbitrarily, therefore more care should be made analyzing the phase of magneto-oscillations to distinguish trivial systems from nontrivial. In this paper we suggest two simple mechanisms dramatically affecting the experimentally observed value of the phase in three-dimensional topological insulators: (i) magnetic field dependence of the chemical potential, and (ii) possible nonuniformity of the system. These mechanisms are not limited to topological insulators and can be extended to other topologically trivial and non-trivial systems.
description: 9 pages, 4 figures, in published version the title was changed
On the stability of periodically time-dependent quantum systems
Creators: name: Duclos, Pierre
name: Soccorsi, Eric
name: Stovicek, Pavel
name: Vittot, Michel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37K55, 47N50,81Q10

description: The main motivation of this article is to derive sufficient conditions for dynamical stability of periodically driven quantum systems described by a Hamiltonian H(t), i.e., conditions under which it holds sup_{t in R} | (psi(t),H(t) psi(t)) |
description: 39 pages
Yukawa Couplings for Bosonic $Z_N$ Orbifolds: Their Moduli and Twisted Sector Dependence
Creators: name: Stieberger, S.
name: Jungnickel, D.
name: Lauer, J.
name: Spalinski, M.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The three point correlation functions with twist fields are determined for bosonic $Z_N$ orbifolds. Both the choice of the modular background (compatible with the twist) and of the (higher) twisted sectors involved are fully general. We point out a necessary restriction on the set of instantons contributing to twist field correlation functions not obtained in previous calculations. Our results show that the theory is target space duality invariant.
description: 12 pages
title: 03_0991
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Galaxies, Human Eyes and Artificial Neural Networks
Creators: name: Lahav, O.
name: Naim, A.
name: Buta, R. J.
name: Corwin, H. G.
name: de Vaucouleurs, G.
name: Dressler, A.
name: Huchra, J. P.
name: Bergh, S. van den
name: Raychaudhury, S.
name: Sodre, L.
name: Storrie-Lombardi, M. C.
Publisher: name: arXiv
Year: 1994
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Quantitative morphological classification of galaxies is important for understanding the origin of type frequency and correlations with environment. But galaxy morphological classification is still mainly done visually by dedicated individuals, in the spirit of Hubble's original scheme, and its modifications. The rapid increase in data on galaxy images at low and high redshift calls for re-examination of the classification schemes and for new automatic methods. Here we show results from the first systematic comparison of the dispersion among human experts classifying a uniformly selected sample of over 800 digitised galaxy images. These galaxy images were then classified by six of the authors independently. The human classifications are compared with each other, and with an automatic classification by Artificial Neural Networks (ANN). It is shown that the ANNs can replicate the classification by a human expert to the same degree of agreement as that between two human experts.
description: To appear in Science. 13 pages, uuencoded compressed postscript file (not including 3 figures). Also available at (131.111.68.35) ftp://cast0.ast.cam.ac.uk/pub/lahav/science/ science5.ps.Z with figures science_fig1.ps.Z, science_fig2.ps.Z and science_fig3.ps.Z in same directory
Vibration-induced modulation of magnetic anisotropy in a magnetic molecule
Creators: name: Kenawy, Ahmed
name: Splettstoesser, Janine
name: Misiorny, Maciej
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically analyze the spectrum of a magnetic molecule when its charge and spin can couple to the molecular vibrations. More specifically, we show that the interplay between charge-vibron and spin-vibron coupling leads to a renormalization of the magnetic anisotropy parameters of the molecule. This effect is discussed for a model device consisting of an individual magnetic molecule embedded in a junction. We study the transport properties of the device and illustrate how the differential conductance is affected by the vibrationally induced renormalization of the magnetic anisotropy. Depending on the total molecular spin and the bare (intrinsic) magnetic anisotropy, the induced modulation can lead to visible shifts and crossings in the spectrum, and it can even be the cause of a transport blockade. It is therefore of particular interest to use mechanically controllable break junctions, since in such a case, the relevant coupling between the molecular spin and vibrations can be controlled via deformations of the molecule when stretching or compressing the junction.
description: 18 pages, 7 figures, version as published
The Higgs Mechanism in Higher-Rank Symmetric $U(1)$ Gauge Theories
Creators: name: Bulmash, Daniel
name: Barkeshli, Maissam
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We use the Higgs mechanism to investigate connections between higher-rank symmetric $U(1)$ gauge theories and gapped fracton phases. We define two classes of rank-2 symmetric $U(1)$ gauge theories: the $(m,n)$ scalar and vector charge theories, for integer $m$ and $n$, which respect the symmetry of the square (cubic) lattice in two (three) spatial dimensions. We further provide local lattice rotor models whose low energy dynamics are described by these theories. We then describe in detail the Higgs phases obtained when the $U(1)$ gauge symmetry is spontaneously broken to a discrete subgroup. A subset of the scalar charge theories indeed have X-cube fracton order as their Higgs phase, although we find that this can only occur if the continuum higher rank gauge theory breaks continuous spatial rotational symmetry. However, not all higher rank gauge theories have fractonic Higgs phases; other Higgs phases possess conventional topological order. Nevertheless, they yield interesting novel exactly solvable models of conventional topological order, somewhat reminiscent of the color code models in both two and three spatial dimensions. We also investigate phase transitions in these models and find a possible direct phase transition between four copies of $\mathbb{Z}_2$ gauge theory in three spatial dimensions and X-cube fracton order.
description: 23+5 pages, 23+7 figures
A non-intersecting random walk on the Manhattan lattice and SLE_6
Creators: name: Kennedy, Tom
Publisher: name: arXiv
Year: 2018
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60J67, 60G50, 60K35, 82B41, 82B43

description: We consider a random walk on the Manhattan lattice. The walker must follow the orientations of the bonds in this lattice, and the walker is not allowed to visit a site more than once. When both possible steps are allowed, the walker chooses between them with equal probability. The walks generated by this model are known to be related to interfaces for bond percolation on a square lattice. So it is natural to conjecture that the scaling limit is SLE$_6$. We test this conjecture with Monte Carlo simulations of the random walk model and find strong support for the conjecture.
description: 14 figures; version 2 adds some discussion of the relation of the random walk model to interfaces in bond percolation on the square lattice. One reference added
Persistent Currents in 1D Disordered Rings of Interacting Electrons
Creators: name: Bouzerar, G.
name: Poilblanc, D.
name: Montambaux, G.
Publisher: name: arXiv
Year: 1993
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We calculate the persistent current of 1D rings of spinless fermions with short-range interactions on a lattice with up to 20 sites, and in the presence of disorder, for various band fillings. We find that {\it both} disorder and interactions always decrease the persistent current by localizing the electrons. Away from half-filling, the interaction has a much stronger influence in the presence of disorder than in the pure case.
description: Latex file, 11 pages, 5 figures available on request, Report LPQTH-93/18
This One Simple Trick Disrupts Digital Communities
Creators: name: Feldman, Philip
name: Dant, Aaron
name: Lutters, Wayne
Publisher: name: arXiv
Year: 2018
Subjects: subject: Multiagent Systems (cs.MA)
subject: Computers and Society (cs.CY)
subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: I.2.11; H.1.2; H.3.3; H.5.3

description: This paper describes an agent based simulation used to model human actions in belief space, a high-dimensional subset of information space associated with opinions. Using insights from animal collective behavior, we are able to simulate and identify behavior patterns that are similar to nomadic, flocking and stampeding patterns of animal groups. These behaviors have analogous manifestations in human interaction, emerging as solitary explorers, the fashion-conscious, and members of polarized echo chambers. We demonstrate that a small portion of nomadic agents that widely traverse belief space can disrupt a larger population of stampeding agents. Extending the model, we introduce the concept of Adversarial Herding, where bad actors can exploit properties of technologically mediated communication to artificially create self sustaining runaway polarization. We call this condition the Pishkin Effect as it recalls the large scale buffalo stampedes that could be created by native Americans hunters. We then discuss opportunities for system design that could leverage the ability to recognize these negative patterns, and discuss affordances that may disrupt the formation of natural and deliberate echo chambers.
Iran’s Social Sciences Issues in Web of Science (WoS): Who Said What?
Creators: name: Baghestan, Abbas Ghanbari
name: Mehrnoosh Akhtari-Zavare
Publisher: name: figshare
Year: 2018
Subjects: subject: Sociology
subject: FOS: Sociology

description: The complexity and interconnected patterns of change in the 21st century have resulted in significant transformation in Iran. During the last two decades, much academic effort
from a variety of disciplines went into trying to understand, examine and predict these transformations. However, there are no in-depth studies on these profound social and cultural
changes as exemplified in global scientific productions. Using a bibliometric approach, we present a comprehensive study of the image of the social sciences in Iran based on the search item “Iran’s Social Sciences” in the Web of Science (WoS). The data were collected from Web of Science’s Core Collections between 2000 and 2017 and was limited to document-type articles in the category of Social Science Citation Index (SSCI). Collection efforts resulted in 4,666 documents being retrieved. The majority of the documents were published in English and were written by Iranian authors. The results of this study show that international collaboration through networking and co-authorship was lower than the global average. In terms of content, health- and medical-related concepts and themes were dominant in overall publications. Given this remarkable insight, more collaboration between sociologists in Iran with scholars from other countries is needed to better
highlight the desired issues and topics.
Further research might focus on the current ‘business models’ of publishing. While we advise launching more scientific journals at the global level, it is important to evaluate whether international business models of publishing are really encouraging or if they pose unnecessary bias and restrictions on knowledge development and participation
of Iranian world-class sociologists.
Double phase transition of the Ising model in core-periphery networks
Creators: name: Chen, Hanshuang
name: Zhang, Haifeng
name: Shen, Chuansheng
Publisher: name: arXiv
Year: 2018
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We study the phase transition of the Ising model in networks with core-periphery structures. By Monte Carlo simulations, we show that prior to the order-disorder phase transition the system organizes into an inhomogeneous intermediate phase in which core nodes are much more ordered than peripheral nodes. Interestingly, the susceptibility shows double peaks at two distinct temperatures. We find that, if the connections between core and periphery increase linearly with network size, the first peak does not exhibit any size-dependent effect, and the second one diverges in the limit of infinite network size. Otherwise, if the connections between core and periphery scale sub-linearly with the network size, both peaks of the susceptibility diverge as power laws in the thermodynamic limit. This suggests the appearance of a double transition phenomenon in the Ising model for the latter case. Moreover, we develop a mean-field theory that agrees well with the simulations.
description: 15 one-column pages, 5 figures
On Realisations of W Algebras
Creators: name: Lu, H.
name: Pope, C. N.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been known for some time that $W$ algebras can be realised in terms of an energy-momentum tensor together with additional free scalar fields. Some recent results have shown that more general realisations are also possible. In this paper, we consider a wide class of realisations that may be obtained from the Miura transformation, related to the existence of canonical subalgebras of the Lie algebras on which the $W$ algebras are based. We give explicit formulae for all realisations of this kind, and discuss their applications in $W$-string theory.
description: 11 pages
On Beyond Ethology: the Animal, the Robot, and the Behavioral Object
Creators: name: Ingram, Ian L.H.
Publisher: name: Carnegie Mellon University
Year: 2010
Subjects: Art

description: Objects that are animate occupy a special place in the human conception of the world. We ourselves are objects that are animate. So are the non-human animals which have been food, predators, cohabitants, and later companions to us during our evolutionary history. The difference between what is animate and what is not and the question of what happens when an animate object begins or ceases to operate - in essence what gives us and the other animals life - have captivated human minds for perhaps that whole time. The same goes for the apparent differences between us and those other animals. These dark spaces in human understanding have always been filled by stories. These take the form of myths, fables, folklore, recipes for magic, and comic strips, to name a few, which act to create a gap between animal fiction and animal truth. That gap and what has splayed it, in the past and now, play a critical role in how we view ourselves and how we relate to nature in general. Stories were also the birthplace of animate objects of human artifice - automatons, golems, homunculi and their brethren. It seems there was a will to replicate the forces that brought us about long before we had the means to take more than a couple of steps. However, the Industrial Revolution led to a world where non-biological animate objects abound, including the behavioral objects we call robots. The tools of robot-making are my tools. Therefore, in this thesis, I also discuss the history and implications of the “robot” concept and try to refine the category, one that has always frustrated definition, in a way that is germane to my work but also, I believe, accurate in encapsulating how people really conceive of robots. My work during the program has been frequently engaged with facets of the animal, robot, and robot/animal dialogues, at some times intentionally, at others not. If a progression can be drawn onto the scattered points of my projects, it would be away from a mindset mostly engrossed in the fictions with which we surround our relationship with animals towards an effort to use contemporary techniques for animating matter purposely to simultaneously engage with animals directly, explore notions of the concept of the robot, investigate the interplay of natural materials and artificial ones, reveal the un- animal-ness in most human perceptions of animals and, finally, uncover the animal-ness of our relationship with our own objects.
On Magnetic Inhibition Theory in Non-resistive Magnetohydrodynamic Fluids
Creators: name: Jiang, Fei
name: Jiang, Song
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We investigate why the non-slip boundary condition for the velocity, imposed in the direction of impressed magnetic fields, can contribute to the magnetic inhibition effect based on the nonhomogeneous magnetic Rayleigh--Taylor (abbr. NMRT) problem in non-resistive magnetohydrodynamic (abbr. MHD) fluids. Exploiting an infinitesimal method in Lagrangian coordinates, the idea of (equivalent) magnetic tension, and the differential version of magnetic flux conservation, we give an explanation of physical mechanism for the magnetic inhibition phenomenon in a non-resistive MHD fluid. Moreover, we find that the magnetic energy in the non-resistive MHD fluid depends on the displacement of fluid particles, and thus can be regarded as elastic potential energy. Motivated by this observation, we further use the well-known minimum potential energy principle to explain the physical meaning of the stability/instability criteria in the NMRT problem. As a result of the analysis, we further extend the results on the NMRT problem to the stratified MHD fluid case. We point out that our magnetic inhibition theory can be used to explain the inhibition phenomenon of other instabilities, such as thermal instability, magnetic buoyancy instability, and so on, by impressed magnetic fields in non-resistive MHD fluids.
Four-body continuum-discretized coupled-channels calculations using a transformed harmonic oscillator basis
Creators: name: Rodríguez-Gallardo, M.
name: Arias, J. M.
name: Gómez-Camacho, J.
name: Johnson, R. C.
name: Moro, A. M.
name: Thompson, I. J.
name: Tostevin, J. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The scattering of a weakly bound three-body system by a target is discussed. A transformed harmonic oscillator basis is used to provide an appropriate discrete and finite basis for treating the continuum part of the spectrum of the projectile. The continuum-discretized coupled channels framework is used for the scattering calculations. The formalism is applied to different reactions, 6He+12C at 229.8 MeV, 6He+64Zn at 10 and 13.6 MeV, and 6He+208Pb at 22 MeV, induced by the Borromean nucleus 6He. Both the Coulomb and nuclear interactions with a target are taken into account.
description: Published in Phys. Rev. C
Iran’s Social Sciences Issues in Web of Science (WoS): Who Said What?
Creators: name: Baghestan, Abbas Ghanbari
name: Mehrnoosh Akhtari-Zavare
Publisher: name: figshare
Year: 2018
Subjects: subject: Sociology
subject: FOS: Sociology

description: The complexity and interconnected patterns of change in the 21st century have resulted in significant transformation in Iran. During the last two decades, much academic effort
from a variety of disciplines went into trying to understand, examine and predict these transformations. However, there are no in-depth studies on these profound social and cultural
changes as exemplified in global scientific productions. Using a bibliometric approach, we present a comprehensive study of the image of the social sciences in Iran based on the search item “Iran’s Social Sciences” in the Web of Science (WoS). The data were collected from Web of Science’s Core Collections between 2000 and 2017 and was limited to document-type articles in the category of Social Science Citation Index (SSCI). Collection
efforts resulted in 4,666 documents being retrieved. The majority of the documents were
published in English and were written by Iranian authors. The results of this study show
that international collaboration through networking and co-authorship was lower than the
global average. In terms of content, health- and medical-related concepts and themes were
dominant in overall publications. Given
this remarkable insight, more collaboration
between sociologists in Iran with scholars
from other countries is needed to better
highlight the desired issues and topics.
Further research might focus on the current
‘business models’ of publishing. While we
advise launching more scientific journals at
the global level, it is important to evaluate
whether international business models of publishing are really encouraging or if they
pose unnecessary bias and restrictions on
knowledge development and participation
of Iranian world-class sociologists.
Covariant Effective Action for Antisymmetric Tensor Field
Creators: name: Aashish, Sandeep
name: Panda, Sukanta
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Covariant quantization of rank-2 antisymmetric fields is non-trivial due to additional symmetries of the gauge parameters. We present an intuitive way to deal with this additional symmetry of gauge parameters in terms of geometrical understanding of field space. We generalize the DeWitt-Vilkovisky covariant effective action formalism for quantization of such theories. As an application, we quantize a massive rank-2 antisymmetric field using the covariant effective action approach and reproduce previously obtained results.
description: 7 pages, 1 figure, prd format; text improved, typos corrected, references added, acknowledgement added; to appear in PRD
On the unsolvability of certain equations of Erdős-Moser type
Creators: name: Baoulina, Ioulia N.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11D61, 11B68, 11B83, 11Y50

description: Let $S_k(m):=\sum_{j=1}^{m-1}j^k$ denote a power sum. In 2011, Kellner proposed the conjecture that for $m>3$ the ratio $S_k(m+1)/S_k(m)$ is never an integer, or, equivalently, that for any positive integer $a$, the equation $aS_k(m)=m^k$ has no solutions in positive integers $k$ and $m$ with $m>3$. In this paper, we show that for many integers $a$ the equation $aT_k(m)=(2m+1)^k$, where $T_k(m):=\sum_{j=1}^m(2j-1)^k$, has no solutions in positive integers $k$ and $m$. This leads us to the conjecture that for $m>1$ the ratio $T_k(m+1)/T_k(m)$ is never an integer.
description: 8 pages
Optical Properties of the South Pole Ice at Depths Between 0.8 and 1 km
Creators: name: The AMANDA Collaboration
Publisher: name: arXiv
Year: 1994
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The optical properties of the ice at the geographical South Pole have been investigated at depths between 0.8 and 1 kilometers. The absorption and scattering lengths of visible light ($\sim$515 nm) have been measured {\it in situ } using the laser calibration setup of the AMANDA neutrino detector. The ice is intrinsically extremely transparent. The measured absorption length is 59 $\pm$ 3 meters, comparable with the quality of the ultra-pure water used in the IMB and Kamiokande proton-decay and neutrino experiments and more than two times longer than the best value reported for laboratory ice. Due to a residual density of air bubbles at these depths, the trajectories of photons in the medium are randomized. Assuming bubbles are smooth and spherical, the average distance between collisions at 1 km depth is about 25 cm. The measured inverse scattering length on bubbles decreases linearly with increasing depth in the volume of ice investigated.
description: Accepted for publication in Science. 16 pages uuencoded PostScript
Obfuscation by Design: How Visual ComComplexity and Cognitive Bias Shape Our Understanding of Political Information
Creators: name: Howard, Adam
Publisher: name: Carnegie Mellon University
Year: 2011
Subjects: Design

description: There is a growing body of research on the ways in which people process and organize political information. However, these studies have focused almost exclusively on textual analysis at a time when people are turning to more visually oriented media in increasing numbers. While researchers have failed to account for this trend, political organizations have quickly adapted and begun to use visual media to their advantage for political messaging. This study examines people’s ability to perceive bias in visual representations of political information. Through a series of surveys and one-on-one interviews, I found that participants exhibited significant confirmation bias in their assessments of visual information. This effect was particularly strong in participants’ initial assessment of each example. The results reveal two potential paths to increasing awareness of bias in visual information. First, basic training in visual design could encourage more thorough examination of new information and result in increased awareness of bias. Second, illustrating the effects of confirmation bias could encourage viewers to pause and reassess their initial reaction to information, again resulting in increased awareness of bias. With these two hypotheses in mind, I have created an interactive guide that teaches basic elements of visual design, such as size and color, and then illustrates the effects of cognitive biases on assessment of information.
Rainbow renters: differences in housing tenure and satisfaction between LGBTIQ and non-LGBTIQ Australians
Creators: name: Grant, Ruby
name: Tranter, Bruce
name: Pisanu, Nyree
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 4405
subject: Gender studies
classificationCode: 4406
subject: Human geography

description: Lesbian, gay, bisexual, transgender, intersex, and queer (LGBTIQ) people’s housing experiences are under-explored in Australia. Previous Australian and international research in social geography and housing studies suggests that this group experiences a range of barriers to secure and affordable housing, confirming the need for further insight in the Australian context. This article examines LGBTIQ housing tenure and satisfaction, drawing on data from two Australian surveys. Our analyses of nationally representative data from the Housing, Income and Labour Dynamics Australia (HILDA) survey, and state-specific data from The Tasmania Project, identify significant differences in housing tenure, and housing satisfaction between LGBTIQ and non-LGBTIQ Australians. We find LGBTIQ Australians are more likely than non-LGBTIQ to rent their homes and less satisfied with their housing overall. We also identify novel differences in housing patterns within LGBTIQ communities. The experiences and needs of LGBTIQ people must be considered for housing policy and services, as well as efforts to address housing stress and homelessness in Australian cities.
Geometric Aspects of Quantum Spin States
Creators: name: Aizenman, Michael
name: Nachtergaele, Bruno
Publisher: name: arXiv
Year: 1993
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: A number of interesting features of the ground states of quantum spin chains are analized with the help of a functional integral representation of the system's equilibrium states. Methods of general applicability are introduced in the context of the SU($2S+1$)-invariant quantum spin-$S$ chains with the interaction $-P^{(0)}$, where $P^{(0)}$ is the projection onto the singlet state of a pair of nearest neighbor spins. The phenomena discussed here include: the absence of Néel order, the possibility of dimerization, conditions for the existence of a spectral gap, and a dichotomy analogous to one found by Affleck and Lieb, stating that the systems exhibit either slow decay of correlations or translation symmetry breaking. Our representation elucidates the relation, evidence for which was found earlier, of the $-P^{(0)}$ spin-$S$ systems with the Potts and the Fortuin-Kasteleyn random-cluster models in one more dimension. The method reveals the geometric aspects of the listed phenomena, and gives a precise sense to a picture of the ground state in which the spins are grouped into random clusters of zero total spin. E.g., within such structure the dichotomy is implied by a topological argument, and the alternatives correspond to whether, or not, the clusters are of finite mean length.
description: 66 pages, Plain TeX (3 figures not included), 1993-0614/0924
On the local asymptotic stabilization of the nonlinear systems with small time-varying perturbations by state-feedback control
Creators: name: Vrabel, Robert
Publisher: name: arXiv
Year: 2018
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 93C10, 93C15, 93C73, 93D15

description: In this paper, we are interested in the relation between the solutions of the control system $\dot x=f(x,u)$ and the solutions of its (potentially unknown) perturbation $\dot x=f(x,u)+w(x,t).$ Under the assumption that the linear part of the unperturbed system at the point $(0,0)$ is controllable and that disturbance $w(x,t)$ is asymptotically sufficiently small, there exists a state-feedback controller of the form $u=-Kx$ such that the perturbed system preserves the local asymptotic stability of the zero solution of unperturbed system. The main result of this paper gives the sufficient conditions, more specifically, the relations between the important parameters of the system, to ensure this property and at the same time provides the method for calculating the lower bound of region of attraction. Moreover, we obtain a nontrivial extension of the classical result of H. K. Khalil regarding asymptotic behavior of the (uncontrolled) perturbed systems whose nominal part is exponentially asymptotically stable at the origin $x=0.$
description: 12 pages, 1 figure; Definition 1 from the previous version have been corrected and the proof of Theorem 3 have been updated
Validity of strong lensing statistics for constraints on the galaxy evolution model
Creators: name: Matsumoto, Akiko
name: Futamase, Toshifumi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We examine the usefulness of the strong lensing statistics to constrain the evolution of the number density of lensing galaxies by adopting the values of the cosmological parameters determined by recent WMAP observation. For this purpose, we employ the lens-redshift test proposed by Kochanek (1992) and constrain the parameters in two evolution models, simple power-law model characterized by the power law indexes $nu_{n}$ and $ν_{v}$ and the evolution model by Mitchell et al. (2005) based on CDM structure formation scenario. We use the well-defined lens sample from the Sloan Digital Sky Survey (SDSS) and this is similarly sized samples used in the previous studies. Furthermore, we adopt the velocity dispersion function of early-type galaxies based on SDSS DR1 and DR5. It turns out that the indexes of power-law model are consistent with the previous studies, thus our results indicate the mild evolution in the number and velocity dispersion of early-type galaxies out to z = 1. However we found that the values for p and q used by Mitchell et al. are inconsistent with the presently available observational data. More complete sample is necessary to withdraw more realistic determination on these parameters.
description: Accepted to MNRAS, 7 pages, 3 figures
ANALYSIS OF THE CHEMICAL COMPOSITION OF THE FOOD ADDITIVE "AS-AN"
Creators: name: Askarov, Ibrohimjon
name: Noibjonova, Hurshida
Publisher: name: Zenodo
Year: 2025

description: The health of the population is the most valuable asset of the state. In order to preserve it, the pharmaceutical industry is tasked with providing the population with high-quality medicines. Based on the measures taken in this direction, a number of important practical results are achieved in organizing the development of competitive drugs based on natural raw materials.
Magic-angle graphene superlattices: a new platform for unconventional superconductivity
Creators: name: Cao, Yuan
name: Fatemi, Valla
name: Fang, Shiang
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Kaxiras, Efthimios
name: Jarillo-Herrero, Pablo
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The understanding of strongly-correlated materials, and in particular unconventional superconductors, has puzzled physicists for decades. Such difficulties have stimulated new research paradigms, such as ultra-cold atom lattices for simulating quantum materials. Here we report on the realization of intrinsic unconventional superconductivity in a 2D superlattice created by stacking two graphene sheets with a small twist angle. For angles near $1.1^\circ$, the first `magic' angle, twisted bilayer graphene (TBG) exhibits ultra-flat bands near charge neutrality, which lead to correlated insulating states at half-filling. Upon electrostatic doping away from these correlated insulating states, we observe tunable zero-resistance states with a critical temperature $T_c$ up to 1.7 K. The temperature-density phase diagram shows similarities with that of the cuprates, including superconducting domes. Moreover, quantum oscillations indicate small Fermi surfaces near the correlated insulating phase, in analogy with under-doped cuprates. The relative high $T_c$, given such small Fermi surface (corresponding to a record-low 2D carrier density of $10^{11} \textrm{cm}^{-2}$ , renders TBG among the strongest coupling superconductors, in a regime close to the BCS-BEC crossover. These novel results establish TBG as the first purely carbon-based 2D superconductor and as a highly tunable platform to investigate strongly-correlated phenomena, which could lead to insights into the physics of high-$T_c$ superconductors and quantum spin liquids.
description: 18 pages, 9 figures (with Methods). A few typos corrected
Membrane Pregeometry and the Vanishing of the Cosmological Constant
Creators: name: Aurilia, A.
name: Smailagic, A.
name: Spallucci, E.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We suggest a model of induced gravity in which the fundamental object is a relativistic {\it membrane} minimally coupled to a background metric and to an external three index gauge potential. We compute the low energy limit of the two-loop effective action as a power expansion in the surface tension. A generalized bootstrap hypothesis is made in order to identify the physical metric and gauge field with the lowest order terms in the expansion of the vacuum average of the composite operators conjugate to the background fields. We find that the large distance behaviour of these classical fields is described by the Einstein action with a cosmological term plus a Maxwell type action for the gauge potential. The Maxwell term enables us to apply the Hawking-Baum argument to show that the physical cosmological constant is ``~probably~'' zero.
description: 14 pages, no figures, phyzzx macro
Penerapan Model Pembelajaran Cooperative Learning Type Jigsaw untuk Meningkatkan Hasil Keterampilan Belajar pada Teknik Dasar Futsal
Creators: name: Arnol, Arnol
Publisher: name: Zenodo
Year: 2024
Subjects: Learning Skills Results, Jigsaw Type Cooperative Learning Model, Futsal

description: This research aims to improve the results of learning skills in basic Futsal Techniques for Class IX APHP A SMKN 1 Surade West Java students by applying the Jigsaw Type Cooperative Learning Model. This type of research is classroom action research. The population used in this research was students in the Agritechnology Department of Agricultural Product Processing at SMKN 1 Surade, West Java, totaling 139 people. The sampling technique used Cluster Sampling, therefore a sample of class XI APHP A SMKN 1 Surade West Java, totaling 21 students, was taken as the research sample. The instruments in this research used observation sheets for each cycle, Pre and Post Tests in the form of essays and skills worksheets. Data analysis was carried out using classroom action research techniques. Based on the results of data analysis, it was obtained: there was an increase in the learning skills of students at SMKN 1 Surade, West Java.
Cambios Estilisticos en la Reproduccion de Piezas Ceramicas de Mata Ortiz, Norte de Chihuahua, Mexico: un Estudio Etnoarqueologico
Creators: name: Freeman, Andrea K. L.
Publisher: name: University of Arizona Department of Anthropology
Year: 1989
Subjects: subject: Chihuahua (Mexico : State)
valueUri: https://core.tdar.org/browse/geographic-keyword/49578/chihuahua-mexico-state
subject: Casas Grandes
valueUri: https://core.tdar.org/browse/site-name/279/casas-grandes
subject: Town / City
valueUri: https://core.tdar.org/browse/site-type/255/town-city
subject: Domestic Structure or Architectural Complex
valueUri: https://core.tdar.org/browse/site-type/251/domestic-structure-or-architectural-complex
subject: Settlements
valueUri: https://core.tdar.org/browse/site-type/252/settlements
subject: Ceramic
valueUri: https://core.tdar.org/browse/material-type/1/ceramic
subject: Heritage Management
valueUri: https://core.tdar.org/browse/investigation-type/24/heritage-management

description: Mata Ortiz es un pequeño poblado en el norte de México, localizado en el estado de Chihuahua (véase la Fig. 1), a 1,600 metros sobre el nivel del mar en las faldas de la montaña conocida localmente como Cabeza del Indio. La aldea está limitada hacia el occidente por la Sierra la Breña, que se encuentra aproximandamente a 10 Kilómetros; al oriente del asentamiento se localiza el río Palanganas, un cauce de temporal que es la principal fuente de abastecimiento, de agua para los habitantes de Mata Ortiz, quienes además cuentan con un pozo.
Quantum Standard Clocks in the Primordial Trispectrum
Creators: name: Chen, Xingang
name: Chua, Wan Zhen
name: Guo, Yuxun
name: Wang, Yi
name: Xianyu, Zhong-Zhi
name: Xie, Tianyou
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the primordial trispectrum of curvature perturbation in quasi-single field inflation, with general sound speeds for both the inflaton and the massive scalar. Special attention is paid to various soft limits of the trispectrum, where the shape function shows characteristic oscillatory pattern (known as the quantum primordial standard clock signal) as a function of the momentum ratio. Our calculation is greatly simplified by using the "mixed propagator" developed under a diagrammatic representation of the in-in formalism.
description: 23 pages, JCAP accepted version
RETURN To an Order of the House of February 1st, by the Honourable the Minister of Finance, showing the amounts contributed to the Provincial Treasury by the City of Vancouver since 30th June, 1888, to 31st December, 1893. Also, a statement showing all amounts in detail granted to and expended in Vancouver City during the same period.
Creators: name: British Columbia. Legislative Assembly
Publisher: name: Victoria, BC : Government Printer
Year: 2014

Abstract
Nirvana Play: Short-Term Play on Academic Campuses
Creators: name: Baptista, Aliya Maria
Publisher: name: Carnegie Mellon University
Year: 2011
Subjects: Design

description: The undergraduate student experience is a unique phase of life, encompassing independence, social group membership, self-identity formation and changing support systems. In addition to their social evolution, students strive to perform well, driven by self and familial expectations, and peer competition native to collegiate environments. I explored these experiences at Carnegie Mellon University (CMU), particularly with respect to a student’s work-life balance and how nonacademic campus spaces play a role in affecting the personal and social emotional environment for students on campus. In my research, I uncovered a persistent state of anxiety resulting from a constant focus on the self, a worldview limited to the CMU work-home bubble and peer-induced stress - all of which contributed to a negatively heightened emotional environment. Non-academic spaces provided on campus, such as recreational, exercise, eating and green savannah and garden spaces, which aimed to serve as coping mechanisms, were found to be difficult to access on a regular basis for various reasons, such as scheduling issues, membership requirements, inconvenient visibility and further, some facilities were found to be overcrowded or had broken equipment. Hence, they did not successfully allow students daily opportunities to mentally suspend themselves from their anxiety. My project looks at transitional environments as new sites for short playful interactions. The Nirvana Play pole is a technologically enhanced environment platform that is embedded on existing infrastructure present within the landscape of a campus i.e. street light posts in outdoor pathways.It has been designed to currently run three applications - the Shadow, the Tower and the Swarm. It aims to provide students with daily opportunities to break away and mentally suspend their anxiety. It strives to contribute to the creation of a preferred emotional environment