cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Continuum Limits of ``Induced QCD": Lessons of the Gaussian Model at d=1 and Beyond
Creators: name: Kogan, I. I.
name: Morozov, A.
name: Semenoff, G. W.
name: Weiss, N.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyze the scalar field sector of the Kazakov--Migdal model of induced QCD. We present a detailed description of the simplest one dimensional {($d$$=$$1$)} model which supports the hypothesis of wide applicability of the mean--field approximation for the scalar fields and the existence of critical behaviour in the model when the scalar action is Gaussian. Despite the ocurrence of various non--trivial types of critical behaviour in the $d=1$ model as $N\rightarrow\infty$, only the conventional large-$N$ limit is relevant for its {\it continuum} limit. We also give a mean--field analysis of the $N=2$ model in {\it any} $d$ and show that a saddle point always exists in the region $m^2>m_{\rm crit}^2(=d)$. In $d=1$ it exhibits critical behaviour as $m^2\rightarrow m_{\rm crit}^2$. However when $d$$>$$1$ there is no critical behaviour unless non--Gaussian terms are added to the scalar field action. We argue that similar behaviour should occur for any finite $N$ thus providing a simple explanation of a recent result of D. Gross. We show that critical behaviour at $d$$>$$1$ and $m^2>m^2_{\rm crit}$ can be obtained by adding a $logarithmic$ term to the scalar potential. This is equivalent to a local modification of the integration measure in the original Kazakov--Migdal model. Experience from previous studies of the Generalized Kontsevich Model implies that, unlike the inclusion of higher powers in the potential, this minor modification should not substantially alter the behaviour of the Gaussian model.
description: 31 pages
X-Atlas: An Online Archive of Chandra's Stellar High Energy Transmission Gratings Observations
Creators: name: Westbrook, Owen W.
name: Evans, Nancy Remage
name: Wolk, Scott J.
name: Kashyap, Vinay L.
name: Nichols, Joy S.
name: Mendygral, Peter J.
name: Slavin, Jonathan D.
name: Spitzbart, Bradley
name: Waldron, Wayne L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The high-resolution X-ray spectroscopy made possible by the 1999 deployment of the Chandra X-ray Observatory has revolutionized our understanding of stellar X-ray emission. Many puzzles remain, though, particularly regarding the mechanisms of X-ray emission from OB stars. Although numerous individual stars have been observed in high-resolution, realizing the full scientific potential of these observations will necessitate studying the high-resolution Chandra dataset as a whole. To facilitate the rapid comparison and characterization of stellar spectra, we have compiled a uniformly processed database of all stars observed with the Chandra High Energy Transmission Grating (HETG). This database, known as X-Atlas, is accessible through a web interface with searching, data retrieval, and interactive plotting capabilities. For each target, X-Atlas also features predictions of the low-resolution ACIS spectra convolved from the HETG data for comparison with stellar sources in archival ACIS images. Preliminary analyses of the hardness ratios, quantiles, and spectral fits derived from the predicted ACIS spectra reveal systematic differences between the high-mass and low-mass stars in the atlas and offer evidence for at least two distinct classes of high-mass stars. A high degree of X-ray variability is also seen in both high and low-mass stars, including Capella, long thought to exhibit minimal variability. X-Atlas contains over 130 observations of approximately 25 high-mass stars and 40 low-mass stars and will be updated as additional stellar HETG observations become public. The atlas has recently expanded to non-stellar point sources, and Low Energy Transmission Grating (LETG) observations are currently being added as well.
Recent progress on color confinement
Creators: name: Di Giacomo, Adriano
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The status is reviewed of the dual superconductivity of QCD vacuum as a mechanism of color confinement.
description: 8 pages. Invited talk at the conference QCD@Work 2007, Martina Franca (Italy) June 16-20 2007
Vertically Sheared Horizontal Flow-Forming Instability in Stratified Turbulence: Analytical Linear Stability Analysis of Statistical State Dynamics Equilibria
Creators: name: Fitzgerald, Joseph G
name: Farrell, Brian F
Publisher: name: arXiv
Year: 2018
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Vertically banded zonal jets are frequently observed in weakly or non-rotating stratified turbulence, with the quasi-biennial oscillation in the equatorial stratosphere and the ocean's equatorial deep jets being two examples. Explaining the formation of jets in stratified turbulence is a fundamental problem in geophysical fluid dynamics. Statistical state dynamics (SSD) provides powerful methods for analyzing turbulent systems exhibiting emergent organization, such as banded jets. In SSD, dynamical equations are written directly for the evolution of the turbulence statistics, enabling direct analysis of the statistical interactions between the incoherent component of the turbulence and the coherent large-scale structure component that underlie jet formation. A second-order closure of SSD, known as S3T, has previously been applied to show that meridionally banded jets emerge in barotropic beta-plane turbulence via a statistical instability referred to as the zonostrophic instability. Two-dimensional Boussinesq turbulence provides a simple model of non-rotating stratified turbulence analogous to the beta-plane model of planetary turbulence. Jets known as vertically sheared horizontal flows (VSHFs) often emerge in simulations of Boussinesq turbulence, but their dynamics is not yet clearly understood. In this work S3T analysis of the zonostrophic instability is extended to study VSHF emergence in two-dimensional Boussinesq turbulence using an analytical formulation of S3T amenable to perturbation stability analysis. VSHFs are shown to form via an instability that is analogous in stratified turbulence to the zonostrophic instability in beta-plane turbulence. This instability is shown to be strikingly similar to the zonostrophic instability, suggesting that jet emergence in both geostrophic and non-rotating stratified turbulence may be understood as instances of the same generic phenomenon.
description: Re-submitted to Journal of the Atmospheric Sciences
Universal Knot Diagrams
Creators: name: Even-Zohar, Chaim
name: Hass, Joel
name: Linial, Nati
name: Nowik, Tahl
Publisher: name: arXiv
Year: 2018
Subjects: subject: Geometric Topology (math.GT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 57M25

description: We study collections of planar curves that yield diagrams for all knots. In particular, we show that a very special class called potholder curves carries all knots. This has implications for realizing all knots and links as special types of meanders and braids. We also introduce and apply a method to compare the efficiency of various classes of curves that represent all knots.
El origen constructivo de los caminos reales empedrados en Colombia : un acercamiento desde el camino real de Sogamoso a Yopal
Creators: name: Araujo Muñoz, Mariana
Publisher: name: Universidad Externado de Colombia
Year: 2024
Subjects: subject: Arqueología - Colombia
subject: Caminos - Investigaciones
subject: Interacción social - Casos de estudio
subject: Caminos reales en Colombia
subject: Origen constructivo
subject: Camino real de Sogamoso a Yopal
subject: Arqueología del paisaje

description: En el estudio de los caminos reales en Colombia existe un debate en la disciplina arqueológica sobre cuál es su origen constructivo, el cual ha sido abordado a partir de las posibilidades de un origen prehispánico, uno romano y uno árabe, pero sin llegar a un consenso al respecto. Teniendo esto en cuenta, esta investigación tiene como objetivo principal comprender, desde la arqueología, los posibles orígenes constructivos del camino de Sogamoso a Yopal como caso de estudio. Cabe resaltar que, durante La Colonia (1550 – 1810), éste formaba parte de una gran red vial dedicada al transporte de ganado desde los Llanos hacia el Altiplano Cundiboyacense, pero que su trazado se remonta a tiempos prehispánicos en donde era utilizado por comunidades indígenas como los Muiscas, los Teguas y los Achaguas, entre otros. Para ello, se aplica como base teórico - metodológica a la arqueología del paisaje, retomando aspectos clave del estructural - funcionalismo.
description: In the study of the royal roads in Colombia there is a debate in the archaeological discipline about what their constructive origin is, which has been approached from the possibilities of a pre-Hispanic origin, a Roman one and an Arab one, but without reaching a consensus. Taking this into account, the main objective of this research is to understand, from archaeology, the possible construction origins of the road from Sogamoso to Yopal as a case study. It should be noted that, during La Colonia (1550 – 1810), this was part of a large road network dedicated to the transportation of livestock from Los Llanos to the Altiplano Cundiboyacense, but its route dates back to pre-Hispanic times where it was used by indigenous communities such as the Muiscas, the Teguas and the Achaguas, among others. To this end, landscape archaeology is applied as a theoretical-methodological framework, taking up key aspects of structural-functionalism.
Neutrino masses from discrete gauge symmetries
Creators: name: Kim, Jihn E.
name: Lindholm, B-A
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate a model with an extra $Z_{2}$ gauge symmetry in the Standard Model. We assume that only the scalars and the leptons carry non-zero charge. The symmetry gives a structure to the mass matrix for the neutrinos. With two extra Higgs singlets and two extra singlet right-handed neutrinos we can build a model that fits the requirements of the MSW-solution of the Solar neutrino problem. With a third singlet right-handed neutrino it is also possible to have a 10 eV neutrino, a dark matter candidate.
description: SNUTP 92-105, Latex
Fundamental Plasmid Strings and Black Rings
Creators: name: Blanco-Pillado, Jose J.
name: Emparan, Roberto
name: Iglesias, Alberto
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct excited states of fundamental strings that admit a semiclassical description as rotating circular loops of string. We identify them with the supergravity solutions for rotating dipole rings. The identification involves a precise match of the mass, radius and angular momentum of the two systems. Moreover, the degeneracy of the string state reproduces the parametric dependence of the entropy in the supergravity description. When the solutions possess two macroscopic angular momenta, they are better described as toroidal configurations (tubular loops) instead of loops of string. We argue that the decay of the string state can be interpreted as superradiant emission of quanta from the ergoregion of the rotating ring.
description: 27 pages, 2 figures, references added, JHEP version
Bosonic quantum Hall states in single-layer two-dimensional optical lattices
Creators: name: Bai, Rukmani
name: Bandyopadhyay, Soumik
name: Pal, Sukla
name: Suthar, K.
name: Angom, D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Quantum Hall (QH) states of 2D single layer optical lattices are examined using Bose-Hubbard model (BHM) in presence of artificial gauge field. We study the QH states of both the homogeneous and inhomogeneous systems. For the homogeneous case we use cluster Gutzwiller mean field (CGMF) theory with cluster sizes ranging from $2\times 2$ to $5\times 5$. We, then, consider the inhomogeneous case, which is relevant to experimental realization. In this case, we use CGMF and exact diagonalization (ED). The ED studies are using lattice sizes ranging from $3\times 3$ to $4\times 12$. Our results show that the geometry of the QH states are sensitive to the magnetic flux $α$ and cluster sizes. For homogeneous system, among various combinations of $1/5\leqslant α\leqslant 1/2$ and filling factor $ν$, only the QH state of $α=1/4$ with $ν=1/2$, $1$, $3/2$ and $2$ occur as ground states. For other combinations, the competing superfluid (SF) state is the ground state and QH state is metastable. For BHM with envelope potential all the QH states observed in homogeneous system exist for box potentials, but none for the harmonic potential. The QH states also persist for very shallow Gaussian envelope potential. As a possible experimental signature we study the two point correlations of the QH and SF states.
description: 11 pages with 13 figures, Published version
EV-FlowNet: Self-Supervised Optical Flow Estimation for Event-based Cameras
Creators: name: Zhu, Alex Zihao
name: Yuan, Liangzhe
name: Chaney, Kenneth
name: Daniilidis, Kostas
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Event-based cameras have shown great promise in a variety of situations where frame based cameras suffer, such as high speed motions and high dynamic range scenes. However, developing algorithms for event measurements requires a new class of hand crafted algorithms. Deep learning has shown great success in providing model free solutions to many problems in the vision community, but existing networks have been developed with frame based images in mind, and there does not exist the wealth of labeled data for events as there does for images for supervised training. To these points, we present EV-FlowNet, a novel self-supervised deep learning pipeline for optical flow estimation for event based cameras. In particular, we introduce an image based representation of a given event stream, which is fed into a self-supervised neural network as the sole input. The corresponding grayscale images captured from the same camera at the same time as the events are then used as a supervisory signal to provide a loss function at training time, given the estimated flow from the network. We show that the resulting network is able to accurately predict optical flow from events only in a variety of different scenes, with performance competitive to image based networks. This method not only allows for accurate estimation of dense optical flow, but also provides a framework for the transfer of other self-supervised methods to the event-based domain.
description: 9 pages, 5 figures, 1 table. Accompanying video: https://youtu.be/eMHZBSoq0sE. Dataset: https://daniilidis-group.github.io/mvsec/, Robotics: Science and Systems 2018
Essays on Macroeconomics
Creators: name: Kapoor, Abha
Publisher: name: Carnegie Mellon University
Year: 2016
Subjects: Economics

description: Economists have thought very deeply about why productivity varies across firms and across countries. Complementary to this are the industry projects published by consultancy firms which identify several frictions faced by firms in developing countries. These frictions generate misallocation, as resources (like capital, labor) are not directed to the most productive firms of the economy. In my dissertation, I focus on analyzing the adverse effects of capital, labor market and behavioral frictions on firm/entrepreneurial growth and welfare. I use both a quantitative model-based approach and firm-level data from a large, developing country to understand this theory deeper. Through my research, I show that corporate diversification strategies, overborrowing are adequate mechanisms to reduce the effect of these frictions.
Putting String/Fivebrane Duality to the Test
Creators: name: Dixon, J. A.
name: Duff, M. J.
name: Plefka, J. C.
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: According to string/fivebrane duality, the Green-Schwarz factorization of the $D=10$ spacetime anomaly polynomial $I_{12}$ into $X_4\, X_8$ means that just as $X_4$ is the anomaly polynomial of the $d=2$ string worldsheet so $X_8$ should be the anomaly polynomial of the $d=6$ fivebrane worldvolume. To test this idea we perform a fivebrane calculation of $X_8$ and find perfect agreement with the string one--loop result.
description: 14 pages, CERN TH-6614/92, CTP-TAMU 60/92
Unbiased estimates of galaxy scaling relations from photometric redshift surveys
Creators: name: Rossi, Graziano
name: Sheth, Ravi K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Many physical properties of galaxies correlate with one another, and these correlations are often used to constrain galaxy formation models. Such correlations include the color-magnitude relation, the luminosity-size relation, the Fundamental Plane, etc. However, the transformation from observable (e.g. angular size, apparent brightness) to physical quantity (physical size, luminosity), is often distance-dependent. Noise in the distance estimate will lead to biased estimates of these correlations, thus compromising the ability of photometric redshift surveys to constrain galaxy formation models. We describe two methods which can remove this bias. One is a generalization of the V_max method, and the other is a maximum likelihood approach. We illustrate their effectiveness by studying the size-luminosity relation in a mock catalog, although both methods can be applied to other scaling relations as well. We show that if one simply uses photometric redshifts one obtains a biased relation; our methods correct for this bias and recover the true relation.
Gemini NIFS survey of feeding and feedback processes in nearby Active Galaxies: VI -- Stellar Populations
Creators: name: Riffel, Rogério
name: Dahmer-Hahn, Luis G.
name: Riffel, Rogemar A.
name: Storchi-Bergmann, Thaisa
name: Dametto, Natacha Z.
name: Davies, Richard
name: Burtscher, Leonard
name: Bianchin, Marina
name: Ruschel-Dutra, Daniel
name: Ricci, Claudio
name: Rosario, David J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use Gemini Near-Infrared Integral Field Spectrograph (NIFS) adaptive optics assisted data-cubes to map the stellar population of the inner few hundred parsecs of a sample of 18 nearby Seyfert galaxies. The near-infrared light is dominated by the contribution of young to intermediate old stellar populations, with light-weighted mean ages $_L\ \lesssim $ 1.5\,Gyr. Hot dust ($HD$) emission is centrally peaked (in the unresolved nucleus), but it is also needed to reproduce the continuum beyond the nucleus in nearly half of the sample. We have analysed the stellar population properties of the nuclear region and their relation with more global properties of the galaxies. We find a correlation between the X-ray luminosity and the contributions from the $HD$, featureless continuum $FC$ and reddening $A_V$. We attribute these correlations to the fact that all these properties are linked to the mass accretion rate to the active galactic nuclei (AGN). We also find a correlation of the bolometric luminosity $log(LBol_{obs})$ with the mass-weighted mean age of the stellar population, interpreted as due a delay between the formation of new stars and the triggering/feeding of the AGN. The gas reaching the supermassive black hole is probably originated from mass loss from the already somewhat evolved intermediate-age stellar population ($_L \lesssim $ 1.5\,Gyr). In summary, our results show that there is a significant fraction of young to intermediate age stellar populations in the inner few 100\,pc of active galaxies, suggesting that this region is facing a rejuvenation process in which the AGN, once triggered, precludes further star formation, in the sense that it can be associated with the lack of new star formation in the nuclear region.
description: Accepted for publication in MNRAS
Essays on International Finance
Creators: name: Kim, Nam Jong
Publisher: name: Carnegie Mellon University
Year: 2015
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: In the first chapter, I study the exchange rate disconnect puzzle in a two-country DSGE framework that features a financial intermediation sector. An intermediary is subject to two types of financing constraints: 1. a segmented deposit market restricted to local households, and 2. a balance-sheet constraint. These two constraints drive a wedge between marginal decisions of home and foreign intermediaries, which in turn, breaks the link between exchange rates and consumption differences in the Backus-Smith relationship. In contrast to traditional models which find a tight link between exchange rate growth and the consumption growth rate differential, the calibrated model produces a correlation of around -0.11, reconciling the model with the empirical evidence. In the second chapter, coauthored with Alexander Schiller, we study asset prices, exchange rates, and consumption dynamics in a general equilibrium two-county macro-finance model that features limited stock market participation as well as nontraded goods and distribution cost. The model generates a high price of risk, smooth exchange rates, and makes substantial progress towards explaining the empirically observed low consumption growth correlation between countries. We find that distribution cost plays a central role for reducing international consumption co-movement while also amplifying risk premia.
CP violation in Higgs decays
Creators: name: He, Xiao-Gang
name: Ma, J. P.
name: McKellar, Bruce
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study CP violation in fermion pair decays of Higgs boson. We idenfy some CP odd observables related to the tree level decay amplitude. We find that a few thousand Higgs boson decay events can already provide important information about CP violation. If the Higgs boson is produced, such an analysis could be carried out at the SSC, LHC and NLC.
description: 9 pages, Revtex, UM-P-93/11, OZ-93/5
Enhanced many-body effects in the excitation spectrum of a weakly-interacting rotating Bose-Einstein condensate
Creators: name: Beinke, Raphael
name: Cederbaum, Lorenz S.
name: Alon, Ofir E.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The excitation spectrum of a highly-condensed two-dimensional trapped Bose-Einstein condensate (BEC) is investigated within the rotating frame of reference. The rotation is used to transfer high-lying excited states to the low-energy spectrum of the BEC. We employ many-body linear-response theory and show that, once the rotation leads to a quantized vortex in the ground state, already the low-energy part of the excitation spectrum shows substantial many-body effects beyond the realm of mean-field theory. We demonstrate numerically that the many-body effects grow with the vorticity of the ground state, meaning that the rotation enhances them even for very weak repulsion. Furthermore, we explore the impact of the number of bosons $N$ in the condensate on a low-lying single-particle excitation, which is describable within mean-field theory. Our analysis shows deviations between the many-body and mean-field results which clearly persist when $N$ is increased up to the experimentally relevant regime, typically ranging from several thousand up to a million bosons in size. Implications are briefly discussed.
Using DSpace as backend service - Workflow-centric repository development in practice
Creators: name: Häyrinen, Ari
Publisher: name: Zenodo
Year: 2019
Subjects: Repository development
agile development
repository workflows

description: We moved from a DSpace -centric development model to a workflow-centric model in order to speed up our repository development. In the workflow-centric model the starting point is not the workflows that the *system* can offer but the workflows that are needed. The organisation defines efficient workflows for content management and then implements tools that support those workflows independently from repository software. The result is a network of applications where the repository software is just one part of the network via REST-api. The best part of the model is that it allows quick experimenting without any significant risks (financial or otherwise). The model also helps to separate tasks that are part of maintaining the core infrastructure from tasks that are content specific. This separation is essential so that we can be sure that libary's development resources are used in best possible ways. In this session I'll demonstrate workflows that are in use in Jyväskylä University Digital Repository JYX and tools that make them possible.
title: X-linked adrenoleukodystrophy: A case report
Creators: name: Nambiar, Akhil
Publisher: name: EURORAD
Year: 2024
Subjects: subject: Neuroradiology
subject: CNS
subject: MR
subject: Clinical Case

description: Clinical History: A 12-year-old boy presented with increasing pigmentation of the face. He was the only boy born of a non-consanguineous marriage. The antenatal period and infancy were uneventful. He had complaints of tiredness and fatigue, with one episode of syncope at school. The mother reported normal intelligence and school performance. No history of fever, head injury seizure or focal neurological deficits. MRI brain was done.

Blood investigations were normal except for raised ACTH levels (1456 pg/dL) and cortisol level of 2 g/dL.

description: 12 years, male
An Accurate Distance to High-Velocity Cloud Complex C
Creators: name: Thom, C.
name: Peek, J. E. G.
name: Putman, M. E.
name: Heiles, Carl
name: Peek, K. M. G.
name: Wilhelm, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report an accurate distance of d = 10+/-2.5kpc to the high-velocity cloud Complex C. Using high signal-to-noise Keck/HIRES spectra of two horizontal-branch stars, we have detected CaII K absorption lines from the cloud. Significant non-detections toward a further 3 stars yield robust lower distance limits. The resulting HI mass of Complex C is 4.9^{+2.8}_{-2.2} x 10^6 Msun; a total mass of 8.2^{+4.6}_{-2.6} x 10^6 Msun is implied, after corrections for helium and ionization. At 10kpc, Complex C has physical dimensions 3x15 kpc, and if it is as thick as it is wide, then the average density is log ~ -2.5. We estimate the contribution of Complex C to the mass influx may be as high as ~0.14 Msun/yr.
description: Resubmitted to ApJ. 8 figures
Semiclassical Quantization of Two-Dimensional Dilaton Gravity
Creators: name: Tanii, Yoshiaki
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantization of the dilaton gravity in two dimensions is discussed by a semiclassical approximation. We compute the fixed-area partition function to one-loop order and obtain the string susceptibility on Riemann surfaces of arbitrary genus. Our result is consistent with the approach using techniques of conformal field theories.
description: 10 pages, STUPP-92-130
The complex gamma-ray behaviour of the Radio Galaxy M87
Creators: name: Benkhali, Faiçal Ait
name: Chakraborty, Nachiketa
name: Rieger, Frank M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Context.In recent years, non-blazar Active Galactic Nuclei (AGN) such as Radio Galaxies have emerged as a highly instructive source class providing unique insights into high energy acceleration and radiation mechanisms. Aims.Here we aim at a detailed characterization of the high-energy (HE;>100 MeV) gamma-ray emission from the prominent radio galaxy M87. Methods.We analyze 8 years of Fermi-LAT data and derive the spectral energy distribution between 100 MeV and 300 GeV. We extract lightcurves and investigate the variability behaviour for the entire energy range as well as below and above 10 GeV. Results.Our analysis provides (i)evidence for HE gamma-ray flux variability and (ii)indications for a possible excess over the standard power-law model above Eb~10 GeV, similar to the earlier indications in the case of Cen A. When viewed in HE-VHE context, this is most naturally explained by an additional component dominating the highest-energy part of the spectrum. Investigation of the gamma-ray lightcurves suggests that the lower-energy (<10 GeV) component is variable on timescales of (at least) a few months. The statistics of the high energy component (>10 GeV) does not allow significant constraints on variability. We find indications, however, for spectral changes with time that support variability of the putative additional component and seem to favor jet-related scenarios for its origin capable of accommodating month-type variability. Conclusions.The current findings suggest that both the high-energy (> Eb) and the very high energy (VHE;>100 GeV) emission in M87 are compatible with originating from the same physical component. The variability behaviour at VHE then allows further constraints on the location and the nature of the second component. In particular, these considerations suggest that the VHE emission during the quiescent state originates in a similar region as during the flare.
description: updated version; accepted by A&A
Introduction to Fedora 5.0 and the API Specification
Creators: name: Woods, Andrew
name: Wilcox, David
name: Bernstein, Daniel
Publisher: name: Zenodo
Year: 2019
Subjects: Fedora
repository
linked open data
preservation

description: Fedora is a flexible, extensible, open source repository platform for managing, preserving, and providing access to digital content. The Fedora community recently released version 5.0, which brings the software into alignment with the recently published API specification. Both new and existing Fedora users will be interested in learning about and experiencing new Fedora features and functionality first-hand. Using pre-configured virtual machines, participants will learn how to create and manage content in Fedora in accordance with linked data best practices and the Portland Common Data Model. Particular attention will be paid to new features and functionality in the 5.0 release. Participants will also learn how to search and run SPARQL queries against content in Fedora using the included Solr index and triplestore, and how to import resources into Fedora and export resources from Fedora to external systems and services as part of a digital curation workflow.
Fermionized parafermions and symmetry-enriched Majorana modes
Creators: name: Chew, Aaron
name: Mross, David F.
name: Alicea, Jason
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: Parafermion zero modes are generalizations of Majorana modes that underlie comparatively rich non-Abelian-anyon properties. We introduce exact mappings that connect parafermion chains, which can emerge in two-dimensional fractionalized media, to strictly one-dimensional fermionic systems. In particular, we show that parafermion zero modes in the former setting translate into 'symmetry-enriched Majorana modes' that intertwine with a bulk order parameter---yielding braiding and fusion properties that are impossible in standard Majorana platforms. Fusion characteristics of symmetry-enriched Majorana modes are directly inherited from the associated parafermion setup and can be probed via two kinds of anomalous pumping cycles that we construct. Most notably, our mappings relate $\mathbb{Z}_4$ parafermions to conventional electrons with time-reversal symmetry. In this case, one of our pumping protocols entails fairly minimal experimental requirements: Cycling a weakly correlated wire between a trivial phase and time-reversal-invariant topological superconducting state produces an edge magnetization with quadrupled periodicity. Our work highlights new avenues for exploring 'beyond-Majorana' physics in experimentally relevant one-dimensional electronic platforms.
description: 40 pages, 14 figures, PRB version
title: ADCO, Cart. 186 (11 H 71), f. 0130v
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2012
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, t. II (XVe siècle), tome II, Archives départementales de la Côte-d'Or, C
art. 186 (11 H 71). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, t. II (XVe siècle), tome II, Archives départementales de la
 Côte-d'Or, Cart. 186 (11 H 71), f. 0130v, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-
project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
QCD Sum Rule and Perturbative QCD Approaches to Pion Compton Scattering
Creators: name: Coriano', Claudio
name: Li, Hsiang-nan
Publisher: name: arXiv
Year: 1993
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compare two approaches to the description of pion Compton scattering at moderate momentum transfer, one being based on local duality QCD sum rules for the invariant amplitudes of the process, which have been derived recently, and the other on the modified factorization formula with Sudakov effects included. We find that perturbative QCD predictions are dominant over those from QCD sum rules only for the scattering angle greater than 90$^o$.
description: 13 pages 4 figures not included availiable upon request (send email to: claudio@max.physics.sunysb.edu), IP-ASTP-18-92
Essays on Information Economy: Analysis of Social, Digital, and Mobile Platforms
Creators: name: Garg, Rajiv
Publisher: name: Carnegie Mellon University
Year: 2013
Subjects: subject: 80609 Information Systems Management
subject: FOS: Computer and information sciences

description: Researchers and practitioners can utilize the large volume of information generated by the recent growth of online platforms to make informed and effective policy and business decisions. Although this availability of information enables innovative solutions, its abundance causes additional challenges in understanding and processing the information to make accurate inferences and predictions. My research is directed at addressing the challenges in understanding this information abundance and in developing innovative solutions to simplify decision making by practitioners. First, I identify whether online networks play a role in information diffusion and provide a framework for understanding and analyzing the data to measure diffusion. Second, I estimate the role of online social networks in job searches and the impact of the increasing number of online social connections on the job search behavior of unemployed workforce. Finally, I evaluate the role of information presented to consumers on mobile app stores as marketing signals. My research approach uses three distinct methods of identifying the economic value of information : 1) an empirical approach to dissect "big data," 2) a survey-based study in collaboration with corporations, and 3) a structural approach to understand the dynamic mobile app stores.
Digital Libraries@UC with DSpace/GLAM
Creators: name: Bernardes, Mário
name: Miguéis, Ana
name: Silva, Ana Luísa
name: Neves, Bruno
Publisher: name: Zenodo
Year: 2019
Subjects: Digital libraries; DSpace; IIIF; Cultural Heritage; Coimbra University Digital Library

description: Coimbra University (UC), one of the oldest universities in Europe (1290), has an important cultural heritage, part of UNESCO World Heritage (2013). In last ten years, part of this heritage has been digitized, originating several digital libraries. By 2012, UCDigitalis platform was released, resulting from a global project for the dissemination of digital contents. Under a common interface, it presents all the digital libraries, from which Almamater (with ancient books, manuscripts, drawings, etc) is the most valuable. The sustainability of the solution and its complex environment led UC to engage on a new approach. With more than ten years of experience in DSpace, we decided to use DSpace-CRIS/GLAM open-source platform to support digital libraries, regarding its architecture and the add-ons available. The aim of the presentation is to share the experience gathered during the implementation of the project, describing the most crucial challenges: data migration, customized curation tasks as well as the use of IIIF for image presentation. We also present the user interface developed on python and using Dspace REST-API and SOLR. The project will continue to be improved with the release of the new DSpace REST-API and the use of a simplified format to upload new documents.
Planetary Stability Zones in Hierarchical Triple Star Systems
Creators: name: Verrier, P. E.
name: Evans, N. W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A symplectic integrator algorithm suitable for hierarchical triple systems is formulated and tested. The positions of the stars are followed in hierarchical Jacobi coordinates, whilst the planets are referenced purely to their primary. The algorithm is fast, accurate and easily generalised to incorporate collisions. There are five distinct cases -- circumtriple orbits, circumbinary orbits and circumstellar orbits around each of the stars in the hierarchical triple -- which require a different formulation of the symplectic integration algorithm. As an application, a survey of the stability zones for planets in hierarchical triples is presented, with the case of a single planet orbiting the inner binary considered in detail. Fits to the inner and outer edges of the stability zone are computed. Considering the hierarchical triple as two decoupled binary systems, the earlier work of Holman & Wiegert on binaries is shown to be applicable to triples, except in the cases of high eccentricities and close or massive stars. Application to triple stars with good data in the multiple star catalogue suggests that more than 50 per cent are unable to support circumbinary planets, as the stable zone is almost non-existent.
description: 16 pages, MNRAS, in press
Computer Simulation of Transport Processes of Admixtures in Nano-Volumes with Casimir Force Interactions
Creators: name: Uvarova, Liudmila
name: Babarin, Sergey
Publisher: name: Zenodo
Year: 2021
Subjects: Casimir force
transport processes
nano-volumes
physical and thermodynamic properties

description: In this work, we study molecular systems using heterogeneous properties on the wall surfaces in the cubic nano-volumes taking into account the distributional impact of the Casimir force on the atoms of the system. The simulation results can be used to study physical and thermodynamic properties of micro canonical ensembles using method of molecular dynamics. The developed model can be used to explore the configuration properties of the system, to determine the influence of the entropy on the transport processes of impurities in nano-structures; to study practical problems when physical constraints exist in nano-mechanisms; to filter impurities in highly dispersed systems; to development control devices in nano-structures which have parallel plates or membranes, including the porous structures. It was found that the Casimir force affects growth of fluctuations in the energy of interatomic bonds, and the temperature of the system leads to increase the potential energy of the system with inversely proportional dependence. The results show accelerated growth of entropy for the impurities, consisting of nitrogen molecules, water and ethanol, also there was taken into account the effect of the Casimir force on the impurities for different types of nano-volumes, and found the equilibrium state of the modeled system with roughness on the walls of the nano-volumes.
Unconventional scaling theory in disorder-driven quantum phase transition
Creators: name: Luo, Xunlong
name: Ohtsuki, Tomi
name: Shindou, Ryuichi
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We clarify novel forms of scaling functions of conductance, critical conductance distribution and localization length in a disorder-driven quantum phase transition between band insulator and Weyl semimetal phases. Quantum criticality of the phase transition is controlled by a clean-limit fixed point with spatially anisotropic scale invariance. We argue that the anisotropic scale invariance is reflected on unconventional scaling function forms in the quantum phase transition. We verify the proposed scaling function forms in terms of transfer-matrix calculations of conductance and localization length in a tight-binding model.
description: 4 pages with supplemental materials
Luminosity Scans for Beam Diagnostics
Creators: name: Hostettler, Michael
name: Fuchsberger, Kajetan
name: Papotti, Giulia
name: Pieloni, Tatiana
name: Papaphilippou, Yannis
Publisher: name: arXiv
Year: 2018
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: A new type of fast luminosity separation scans ("Emittance Scans") was introduced at the CERN Large Hadron Collider (LHC) in 2015. The scans were performed systematically in every fill with full-intensity beams in physics production conditions at the Interaction Point (IP) of the Compact Muon Solenoid (CMS) experiment. They provide both emittance and closed orbit measurements at a bunch-by-bunch level. The precise measurement of beam-beam closed orbit differences allowed a direct, quantitative observation of long-range beam-beam PACMAN effects, which agrees well with numerical simulations from an improved version of the TRAIN code.
NUTQ ME'YORLARINI O'ZLASHTIRISHDA PSIXOLINGVISTIKA INTEGRATSIYASI
Creators: name: Aldasheva Shirin Jalgasovna Ajiniyoz nomidagi Nukus davlat pedagogika instituti dots.f.f.f.d.(PhD) Davletmuradova Mohim Perdebay  qizi Oʻzbek tili va adabiyot bakalavr taʼlim yoʻnalishi 1-bosqish talabasi
Publisher: name: Zenodo
Year: 2025

description: Ushbu maqolada tilshunoslik va psixolingvistika integratsiyasi asosida nutq me’yorlarini o‘zlashtirish jarayoni tahlil qilinadi. Integrativ yondashuv til nazariyasi masalalariga tatbiq etilgan bo‘lib, psixolingvistik tahlil namunalari keltirilgan, og‘zaki va yozma nutqqa oid psixolingvistik yondashuv tamoyillari ishlab chiqilgan. Shuningdek, maqolada semantik maydon va valentlik modellari, lingvistik va psixolingvistik yondashuvlarning ahamiyati ham yoritilgan.

Kalit soʻzlar: tilshunoslik, psixolingvistika, integrativ yondashuv, nutq me’yorlari, semantik maydon, valentlik modeli, og‘zaki nutq, yozma nutq, afaziya, neyrolingvistika, fonetika, fiziologiya, til va nutq munosabati, nutq buzilishlari, lingvistik kompetensiya, savodxonlik, logopedik tadqiqotlar
Trace Anomalies from Quantum Mechanics
Creators: name: Bastianelli, Fiorenzo
name: van Nieuwenhuizen, Peter
Publisher: name: arXiv
Year: 1992
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The 1-loop anomalies of a d-dimensional quantum field theory can be computed by evaluating the trace of the regulated path integral jacobian matrix, as shown by Fujikawa. In 1983, Alvarez-Gaumé and Witten observed that one can simplify this evaluation by replacing the operators which appear in the regulator and in the jacobian by quantum mechanical operators with the same (anti)commutation relations. By rewriting this quantum mechanical trace as a path integral with periodic boundary conditions for a one-dimensional supersymmetric nonlinear sigma model, they obtained the chiral anomalies for spin 1/2 and 3/2 fields and selfdual antisymmetric tensors in d dimensions. In this article, we treat the case of trace anomalies for spin 0, 1/2 and 1 fields in a gravitational and Yang-Mills background. We do not introduce a supersymmetric sigma model, but keep the original Dirac matrices $\g^\m$ and internal symmetry generators $T^a$ in the path integral. As a result, we get a matrix-valued action. Gauge covariance of the path integral then requires a definition of the exponential of the action by time-ordering. We exponentiate the factors $\sqrt g$ in the path integral measure by using vector ghosts in order to exhibit the cancellation of the sigma model divergences more clearly. We compute the trace anomalies in d=2 and d=4.
description: 29 pages, harvmac macro, CERN-TH.6512/92, USITP-92-02
DSpace 7 - The Angular UI from a user's perspective
Creators: name: Lowel, Art
name: Deroost, Ignace
Publisher: name: Zenodo
Year: 2019
Subjects: User Experience
User Interface
DSpace
Angular

description: When it comes to a user's needs, the user interface fulfills an important role. It is the connecting device between the user, and the under the hood machinery that keeps a repository running. The soon to be released DSpace 7 will include a brand-new user interface which is based on the Angular technology. Presentations at previous Open Repositories conferences already emphasized the technical benefits of using this technology as the framework for a new DSpace user interface. Building further on those contributions this presentation will now focus on the improvements the Angular technology will bring to DSpace users and provide a functional overview of the new Angular user interface. This presentation will address improvements both for human and for machine users.