cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
About the Expressive Power and Complexity of Order-Invariance with Two Variables
Creators: name: Bednarczyk, Bartosz
name: Grange, Julien
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Order-invariant first-order logic is an extension of first-order logic FO where formulae can make use of a linear order on the structures, under the proviso that they are order-invariant, i.e. that their truth value is the same for all linear orders. We continue the study of the two-variable fragment of order-invariant first-order logic initiated by Zeume and Harwath, and study its complexity and expressive power. We first establish coNExpTime-completeness for the problem of deciding if a given two-variable formula is order-invariant, which tightens and significantly simplifies the coN2ExpTime proof by Zeume and Harwath. Second, we address the question of whether every property expressible in order-invariant two-variable logic is also expressible in first-order logic without the use of a linear order. We suspect that the answer is ``no''. To justify our claim, we present a class of finite tree-like structures (of unbounded degree) in which a relaxed variant of order-invariant two-variable FO expresses properties that are not definable in plain FO. By contrast, we show that if one restricts their attention to classes of structures of bounded degree, then the expressive power of order-invariant two-variable FO is contained within FO.
description: arXiv admin note: text overlap with arXiv:2207.04986
title: Farey Maps, Spectra and Integer Continued Fractions
Creators: name: Stanier, Margaret
Publisher: name: The Open University
Year: 2022

description: We examine the structure of Farey maps, a class of graph embeddings on surfaces that have received significant attention recently. When the Farey graph is embedded in the hyperbolic plane it induces a tessellation by ideal triangles. Farey maps are the quotients of this tessellation by the principal congruence subgroups of the modular group. We describe how the Farey maps of different levels are related to each other through regular coverings and parallel products, and use this to find their complete spectra. We then generalise Farey maps to include those defined by non–principal congruence subgroups of the modular group, finding their spectra and diameter. We also examine a similar class of maps defined by Hecke groups, again obtaining results for their spectra and diameter. Most of this work is the subject of [63], which has been published in Acta Mathematica Universitatis Comenianae. Fundamental to the theory of continued fractions is the fact that every infinite continued fraction with positive integer coefficients converges; however, this is not so if the coefficients are integers which are not necessarily positive. We show that integer continued fractions can be represented as paths on the Farey graph, and use this to develop a simple test that determines whether an integer continued fraction converges or diverges. In addition, for convergent continued fractions, the test specifies whether the limit is rational or irrational. This work, carried out jointly with Ian Short, is the subject of [57], which has been published in the Proceedings of the American Mathematical Society. Finally further work is described, including practical applications of our spectral results, and a search for interesting expansions of real numbers as generalised continued fractions.
MUSE spectroscopy of planetary nebulae with high abundance discrepancies
Creators: name: García-Rojas, Jorge
name: Morisset, Christophe
name: Jones, David
name: Wesson, Roger
name: Boffin, Henri M. J.
name: Monteiro, Hektor
name: Corradi, Romano L. M.
name: Rodríguez-Gil, Pablo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present MUSE deep integral-field unit spectroscopy of three planetary nebulae(PNe) with high abundance discrepancy factors (ADF > 20): NGC 6778, M 1-42 and Hf 2-2. We have constructed flux maps for more than 40 emission lines, and use them to build extinction, electron temperature (T$_e$), electron density (n$_e$), and ionic abundances maps of a number of ionic species. The effects of the contribution of recombination to the auroral [N II] and [O II] lines on T$_e$ and the abundance maps of low-ionization species are evaluated using recombination diagnostics. As a result, low T$_e$ values and a downward gradient of T$_e$ are found toward the inner zones of each PN. Spatially, this nearly coincides with the increase of abundances of heavy elements measured using recombination lines in the inner regions of PNe, and strongly supports the presence of two distinct gas phases: a cold and metal-rich and a warm one with "normal" metal content. We have simultaneously constructed, for the first time, the ADF maps of O$^+$ and O$^{2+}$ and found that they centrally peak for all three PNe under study. We show that the main issue when trying to compute realistic abundances from either ORLs or CELs is to estimate the relative contribution of each gas component to the H I emission, and we present a method to evaluate it. It is also found that, for the studied high-ADF PNe, the amount of oxygen in the cold and warm regions is of the same order.
description: 20 pages, 10 Tables, 16 Figures. Additional material in appendix, 1 Table and 22 Figures. This article has been accepted for publication in MNRAS, Published by Oxford University Press on behalf of the Royal Astronomical Society
title: Backstories / Black Stories:  Black Journalists, INGOs and the Racial Politics of Representing Sub-Saharan Africa in Mainstream UK News Media
Creators: name: Douglas, Omega
Publisher: name: Goldsmiths, University of London
Year: 2019

description: Academic concern with representations of sub-Saharan Africa in Western news media is intensifying. In particular, there is burgeoning interest in how INGOs and black journalists, within and outside the African diaspora, influence the narration of Africa in international news. The positionalities of both actors in the field of reporting on sub-Saharan Africa has far-reaching implications for whether historically rooted, racist Western understandings of the region may be subverted. Yet questions of race exist on the margins of scholarship in this area. Unlike most current research on coverage of Africa, this study inserts issues of race and racism into debate. It is distinctive by linking critical race and postcolonial theories to Bourdieu’s (2005) ‘journalistic field’.

Through in-depth interviews with journalists of colour and INGO press officers who work for some of Britain’s largest news and aid organisations, the concept of postcolonial journalistic field theory (PCJFT) is developed. This new interdisciplinary framework, alongside the development of notions such as quadruple consciousness, schizophrenic inclusion and life-in-death, importantly adds to theories of representation, black (British) identity, journalism, race and cultural production studies, by showing how methods and critiques that are part of critical race and postcolonial theories, enable theoretically grounded accounts of how and why mediated racial discourses occur. 

PCJFT shows that a contextual study is essential to understanding the racial politics that this research found informs the production and representation of news on sub-Saharan Africa in UK media, by accounting for the complex relations between journalists’ experiences and ‘standpoints’ (Hill Collins, 1998, 2000), institutional culture and the power of news media and INGO sources. As such, this study reveals a historicised, racialised, capitalist, moralising discourse exists in relation to mainstream UK news on black African Others, and proposes a phenomenological approach to race within journalism as a vital means of dismantling such discourse.
title: Los tweets de @DigitalCSIC en 2011
title: @DigitalCSIC's tweetbook 2011
titleType: AlternativeTitle
Creators: name: Oficina Técnica De DIGITAL.CSIC
Publisher: name: Digital.CSIC
Year: 2013
Subjects: Twitter
2011
@DigitalCSIC
DIGITAL.CSIC
Acceso abierto
Open Access

description: 15 páginas.-- Documento creado el 03/08/2013 en http://tweetbook.in.-- El documento está sujeto a una licencia Creative Commons Reconocimiento-Nocomercial-CompartirIgual 4.0 Internacional
description: Documento que contiene los tweets publicados desde el inicio de la cuenta, 06/10/2011, hasta fin de 2011 (41).
title: Partizipative & sozialverantwortliche Technikentwicklung
Creators: name: Berger, Arne
name: Buchmüller, Sandra
name: Draude, Claude
name: Klüber, Sara
name: Mucha, Henrik
name: Stilke, Julia
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2020
Subjects: subject: Workshop
subject: Diversity
subject: Participation
subject: Methods
subject: Reflection

description: Im Workshop treffen sich Forscher*innen und Praktiker*innen zu Austausch und Diskussion über die Beteiligung von Nutzer*innen an Technikentwicklungsprozessen. Sie gehen dabei der Frage nach, wie Partizipation dem Anspruch auf Demokratisierung und Empowerment in Forschung und Praxis gerecht werden kann. Im Workshop werden außerdem die nächsten Schritte für die frisch gegründete Fachgruppe „Partizipation“ im Fachbereich Mensch-Computer-Interaktion (MCI) der Gesellschaft für Informatik (GI) konzipiert.
title: Los tweets de @DigitalCSIC en 2012
title: @DigitalCSIC's tweetbook 2012
titleType: AlternativeTitle
Creators: name: Oficina Técnica De DIGITAL.CSIC
Publisher: name: Digital.CSIC
Year: 2013
Subjects: Twitter
2012
@DigitalCSIC
DIGITAL.CSIC
Acceso abierto
Open Access

description: 60 páginas.-- Documento creado el 02/06/2013 en http://tweetbook.in.-- El documento está sujeto a una licencia Creative Commons Reconocimiento-Nocomercial-CompartirIgual 4.0 Internacional
description: Documento que contiene los tweets publicados en 2012 (305).
General solution of an exact correlation function factorization in conformal field theory
Creators: name: Simmons, Jacob J. H.
name: Kleban, Peter
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We discuss a correlation function factorization, which relates a three-point function to the square root of three two-point functions. This factorization is known to hold for certain scaling operators at the two-dimensional percolation point and in a few other cases. The correlation functions are evaluated in the upper half-plane (or any conformally equivalent region) with operators at two arbitrary points on the real axis, and a third arbitrary point on either the real axis or in the interior. This type of result is of interest because it is both exact and universal, relates higher-order correlation functions to lower-order ones, and has a simple interpretation in terms of cluster or loop probabilities in several statistical models. This motivated us to use the techniques of conformal field theory to determine the general conditions for its validity. Here, we discover a correlation function which factorizes in this way for any central charge c, generalizing previous results. In particular, the factorization holds for either FK (Fortuin-Kasteleyn) or spin clusters in the Q-state Potts models; it also applies to either the dense or dilute phases of the O(n) loop models. Further, only one other non-trivial set of highest-weight operators (in an irreducible Verma module) factorizes in this way. In this case the operators have negative dimension (for c < 1) and do not seem to have a physical realization.
description: 7 pages, 1 figure, v2 minor revisions
A Comparative Study of Scanpath Models in Graph-Based Visualization
Creators: name: Lopez-Cardona, Angela
name: Emami, Parvin
name: Idesis, Sebastian
name: Duraisamy, Saravanakumar
name: Leiva, Luis A.
name: Arapakis, Ioannis
Publisher: name: arXiv
Year: 2025
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Information Visualization (InfoVis) systems utilize visual representations to enhance data interpretation. Understanding how visual attention is allocated is essential for optimizing interface design. However, collecting Eye-tracking (ET) data presents challenges related to cost, privacy, and scalability. Computational models provide alternatives for predicting gaze patterns, thereby advancing InfoVis research. In our study, we conducted an ET experiment with 40 participants who analyzed graphs while responding to questions of varying complexity within the context of digital forensics. We compared human scanpaths with synthetic ones generated by models such as DeepGaze, UMSS, and Gazeformer. Our research evaluates the accuracy of these models and examines how question complexity and number of nodes influence performance. This work contributes to the development of predictive modeling in visual analytics, offering insights that can enhance the design and effectiveness of InfoVis systems.
title: Recommendations to Handle Health-related Small Imbalanced Data in Machine Learning
Creators: name: Rauschenberger, Maria
name: Baeza-Yates, Ricardo
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2020
Subjects: subject: Machine Learning
subject: Human-Centered Design
subject: HCD
subject: interactive systems
subject: health
subject: small data
subject: imbalanced data
subject: over-fitting
subject: variances
subject: interpretable results
subject: guidelines.

description: When discussing interpretable machine learning results, researchers need to compare results and reflect on reliable results, especially for health-related data. The reason is the negative impact of wrong results on a person, such as in missing early screening of dyslexia or wrong prediction of cancer. We present nine criteria that help avoiding over-fitting and biased interpretation of results when having small imbalanced data related to health. We present a use case of early screening of dyslexia with an imbalanced data set using machine learning classification to explain design decisions and discuss issues for further research.
Quantum geometry and quantum dynamics at the Planck scale
Creators: name: Bojowald, Martin
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Canonical quantum gravity provides insights into the quantum dynamics as well as quantum geometry of space-time by its implications for constraints. Loop quantum gravity in particular requires specific corrections due to its quantization procedure, which also results in a discrete picture of space. The corresponding changes compared to the classical behavior can most easily be analyzed in isotropic models, but perturbations around them are more involved. For one type of corrections, consistent equations have been found which shed light on the underlying space-time structure at the Planck scale: not just quantum dynamics but also the concept of space-time manifolds changes in quantum gravity. Effective line elements provide indications for possible relationships to other frameworks, such as non-commutative geometry.
description: 10 pages, 2 figures, Proceedings of "The Planck Scale" (XXV Max Born Symposium, Wroclaw)
Dynamical analysis and cosmological evolution in Weyl integrable gravity
Creators: name: Paliathanasis, Andronikos
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the cosmological evolution for the physical parameters in Weyl integrable gravity in a Friedmann--Lema\^ıtre--Robertson--Walker universe with zero spatially curvature. For the matter component, we assume that it is an ideal gas, and of the Chaplygin gas. From the Weyl integrable gravity a scalar field is introduced by a geometric approach which provides an interaction with the matter component. We calculate the stationary points for the field equations and we study their stability properties. Furthermore, we solve the inverse problem for the case of an ideal gas and prove that the gravitational field equations can follow from the variation of a Lagrangian function. Finally, variational symmetries are applied for the construction of analytic and exact solutions.
description: 17 pages, no figures
Los tweets de @DigitalCSIC en 2013
Creators: name: Oficina Técnica De DIGITAL.CSIC
Publisher: name: Digital.CSIC
Year: 2014
Subjects: Twitter
2013
@DigitalCSIC
DIGITAL.CSIC
Acceso abierto
Open Access

description: 59 páginas.-- Documento creado el 07/01/2014 en http://tweetbook.in.-- El documento está sujeto a una licencia Creative Commons Reconocimiento-Nocomercial-CompartirIgual 4.0 Internacional
description: Documento que contiene los tweets publicados en 2013 (276).
Right-handed neutrino magnetic moments
Creators: name: Aparici, Alberto
name: Kim, Kyungwook
name: Santamaria, Arcadi
name: Wudka, Jose
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the phenomenology of the most general effective Lagrangian, up to operators of dimension 5, build with standard model fields and interactions including right-handed neutrinos. In particular we find there is a dimension 5 electroweak moment operator of right-handed neutrinos, not discussed previously in the literature, which could have interesting phenomenological consequences.
description: 34 pages, 8 figures
Baryon Spectroscopy and the Origin of Mass
Creators: name: Klempt, Eberhard
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The proton mass arises from spontaneous breaking of chiral symmetry and the formation of constituent quarks. Their dynamics cannot be tested by proton tomography but only by studying excited baryons. However, the number of excited baryons is much smaller than expected within quark models; even worse, the existence of many known states has been challenged in a recent analysis which includes - compared to older analyses - high-precision data from meson factories. Hence $πN$ elastic scattering data do not provide a well-founded starting point of any phenomenological analysis of the baryon excitation spectrum. Photoproduction experiments now start to fill in this hole. Often, they confirm the old findings and even suggest a few new states. These results encourage attempts to compare the pattern of observed baryon resonances with predictions from quark models, from models generating baryons dynamically from meson-nucleon scattering amplitudes, from models based on gravitational theories, and with the conjecture that chiral symmetry may be restored at high excitation energies. Best agreement is found with a simple mass formula derived within AdS/QCD. Consequences for our understanding of QCD are discussed as well as experiments which may help to decide on the validity of models.
description: Hadron 2009 invited talk, 8 pages, 6 figures, 4 tables
title: rapid UX-score: Modulare und Adaptive Messung von User Experience
Creators: name: Busch, Marc
name: della Schiava, Marco
name: Kipke, Christine
name: Salzbrunn, Benedikt
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2020
Subjects: subject: UX Messung
subject: Modulare UX Messung
subject: Adaptive UX Messung
subject: Rasch-Modell

description: Mehrere User Experience (UX)-Faktoren im Rahmen von User-Tests zu messen ist nicht trivial: Existierende Messinstrumente sind überwiegend als Standalone-Lösungen konzipiert, die aufgrund ihrer unterschiedlichen Item-Konstruktion und Auswerteverfahren nur schwer miteinander vergleichbar sind. Auch für die Benutzer*innen ist die Beantwortung verschiedener Item-und Skalen-Typen kognitiv herausfordernd. Schwerwiegend kommt hinzu, dass die meisten UX-Messinstrumente pro Faktor vieleverschiedene Items vorgeben, was zu zeitlichen Problemen in der Durchführung beiträgt. rapid UX-score soll diese Probleme lösen und ein modulares UX-Instrument entwickeln, bei welchem die Items in adaptiver Weise vorgegeben werden, was in anderen Anwendungsfeldern schon zu stark verkürzten Messinstrumenten geführt hat. Der Einsatz des Rasch-Modells im BereichderUser Experience-Messung ist innovativ, da existierende UX-Messinstrumente nach Prinzipien der Klassischen Testtheorie aufgebaut sind. Unser Ziel ist ein modularisiertes Messinstrument zur flexiblen und schnellen Messung der Faktoren Usability, Zufriedenheit, Ästhetik, Emotionales- und Flow-Erleben, sowie der subjektiven Preis-Sensitivität. Ziel ist, dass für jeden Faktor nicht mehr als vier Items für eine ausreichend genaue Messung benötigt werden. Das Messinstrument rapid UX-score soll für die Vorgabe für Business- und Consumer-Produkte konzipiert werden und eine Vergleichsdatenbank mit ähnlichen (digitalen) Produkten enthalten. Die Entwicklung wird auf Open Science- und Open Source-Prinzipien fußen.
title: Los tweets de @bibliotecasCSIC en 2012
title: @bibliotecasCSIC's tweetbook 2012
titleType: AlternativeTitle
Creators: name: Unidad De Recursos De Información Científica Para La Investigación (URICI)
Publisher: name: Digital.CSIC
Year: 2013
Subjects: Twitter
2012
@bibliotecasCSIC
Bibliotecas del CSIC
Archivos del CSIC
CSIC libraries
CSIC Archives

description: 224 páginas.-- Documento creado el 19/02/2013 en http://tweetbook.in.-- El documento está sujeto a una licencia Creative Commons Reconocimiento-Nocomercial-CompartirIgual 4.0 Internacional
description: Documento que contiene los tweets publicados en 2012 (1665).
The relationship of cleft palate to riboflavin deficiency and genotype in chickens
Creators: name: Juriloff, Diana Marie
Publisher: name: University of British Columbia
Year: 2011

description: The incidence of cleft palate was observed in 1361 F₁, 1531 F₂, and 2275 backcross embryos and chicks from a reciprocal cross between an inbred Leghorn line selected for high incidence (30 to 50%) of cleft palate and a non-cleft palate (New Hampshire; zero %) line. Cleft palate appeared in the F₁ at frequencies less than 1%, in the F₂ at approximately 1%, and in the backcrosses at approximately 8%. When dams were fed a diet deficient in riboflavin, the incidence of cleft palate was shown to increase for the F₂ and backcross progeny to 4% and 12% respectively. The response of cleft palate incidence to riboflavin deficiency was shown to be in large part a genetic characteristic of the embryo itself and not the dam. The reduced hatchability of eggs during maternal riboflavin deficiency was shown to be similar to earlier reports. No evidence of any unusual response of cleft palate line hens to riboflavin deficiency was found for hatchability, chick body weight, nor maternal effect on cleft palate. The cleft palate condition was shown to be semi-lethal, the lethality being partially due to severe expression of the trait. Genetic models were considered and it was suggested that the model to be further tested should be that of 3 recessive loci, one of which involves a fault in the normal metabolism of riboflavin, and a few additive loci controlling penetrance and expressivity of the trait.
title: Los tweets de @bibliotecasCSIC en 2013
title: @bibliotecasCSIC's tweetbook 2013
titleType: AlternativeTitle
Creators: name: Unidad De Recursos De Información Científica Para La Investigación (URICI)
Publisher: name: Digital.CSIC
Year: 2014
Subjects: Twitter
2013
@bibliotecasCSIC
Bibliotecas del CSIC
Archivos del CSIC
CSIC libraries
CSIC Archives

description: 213 páginas.-- Documento creado el 09/01/2014 en http://tweetbook.in.-- El documento está sujeto a una licencia Creative Commons Reconocimiento-Nocomercial-CompartirIgual 4.0 Internacional
description: Documento que contiene los tweets publicados en 2013 (1504).
Results of UBV Photoelectric Observations of the Early-Type Eclipsing Binary System XZ Cep
Creators: name: Kumsiashvili, M. I.
name: Chargeishvili, K. B.
name: Janiashvili, E. B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Results of the three-colour photoelectric observation of the close binary system XZ Cep, obtained at the Abastumani Astrophysical observatory, are presented.
description: 23 pages, 3 figures, 1 teble
title: Remote Instruction in Virtual Reality: A Study of Students Attending Class Remotely from Home with VR Headsets
Creators: name: Yoshimura, Andrew
name: Borst, Christoph Walter
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2020
Subjects: subject: virtual reality
subject: educational VR
subject: teleconferencing
subject: distance learning
subject: remote instruction
subject: Mozilla Hubs
subject: COVID-19
subject: SARS-CoV-2

description: Although video-conferencing tools are generally accepted for remote instruction, they may lack the interactivity and quality of in-person classes. As an alternative, we studied a VR classroom with students and teachers using VR headsets and Mozilla Hubs, a social VR platform. Results show that while attending remote lectures in VR can be a good experience overall, it is important to reduce technical problems and simulator sickness. Users at home may encounter more problems than those in controlled conditions due to the less consistent settings. Nonetheless, students believe prospects for remote VR classes are good. Students who reported little or no sickness gave especially high ratings of several aspects. We also provide teacher suggestions for tool requirements.
Vías de acceso abierto para la producción científica CSIC
Creators: name: Bernal, Isabel
name: Oficina Técnica De DIGITAL.CSIC
Publisher: name: Digital.CSIC
Year: 2013
Subjects: CSIC research outputs
Green route
Gold route
Producción científica CSIC
Vía verde
Vía dorada
DIGITAL.CSIC

description: Presentación en las Jornadas de SWETS sobre acceso abierto, 14 noviembre, 2013, Barcelona.
Digital.CSIC, ¿qué sucedió en 2013?
Creators: name: Román-Molina, Juan
name: Bernal, Isabel
name: Oficina Técnica De DIGITAL.CSIC
Publisher: name: CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)
Year: 2014
Subjects: Open Access
DIGITAL.CSIC
Repositorio institucional del CSIC
CSIC institutional repository
Acceso abierto
2013

description: Póster que muestra los principales hechos llevados a cabo en el año 2013.
Remodeling of occluded internal carotid artery in vessel wall magnetic resonance imaging
Creators: name: Zhou, Jun
name: Cai, Shi-feng
name: Yuan, Xian-shun
name: Pang, Zai-ying
name: Yu, Bing-xin
name: Yao, Hong
name: Xu, Jing-jing
name: Pang, Yue-jiu
name: Guo, Ning
name: Liu, Xue-ping
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified

description: Objective: The purpose of the present study was to investigate the remodeling pattern of the extracranial occluded internal carotid artery (OICA) by vessel wall magnetic resonance imaging (VWI). Methods: Thirty-nine atherosclerotic OICAs from 32 consecutive cases underwent 3-Tesla VWI to acquire pre- and post-contrast T1-weighted 2-dimensional fluid-attenuated inversion recovery fast spin echo sequences. 25 symptomatic CAs exhibited ipsilateral downstream cerebral ischemia or ophthalmic artery embolism within last three months. The 14 remaining CAs were asymptomatic. Twenty-four CAs from 22 patients with atherosclerosis but no stenosis were recruited as control group. The outer wall area (OWA) was calculated based on the outer contour of the CA drawn on the pre-contrast VWI. Negative remodeling was defined as a lower OWA compared to that of control group. Results: Clinical characteristics including age, sex, and vascular risk factors showed no significant difference between the occluded and control group. However, the OWA was lower in the occluded group than in control group (0.63 versus 0.90 cm2, p = 0.004). For all OICAs, the OWA was larger in symptomatic cases than asymptomatic cases (0.71 versus 0.49cm2, p = 0.025). Using a cutoff value of 0.44, the sensitivity and specificity of OWA for detecting symptomatic OICA were 0.0.88 and 0.57, respectively. Heterogeneous signal intensity and enhancement were more often observed at the proximal than the distal segment of occlusion (p < 0.001). The inter-observer agreement regarding the evaluation of VWI characteristics was desirable (κ = 0.805 ∼ 0.847). Conclusions: Negative remodeling is prevalent in OICA, especially in asymptomatic cases.
Experimental violation of a Bell inequality with two different degrees of freedom of entangled particle pairs
Creators: name: Ma, Xiao-song
name: Qarry, Angie
name: Kofler, Johannes
name: Jennewein, Thomas
name: Zeilinger, Anton
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate hybrid entanglement of photon pairs via the experimental violation of a Bell inequality with two different degrees of freedom (DOF), namely the path (linear momentum) of one photon and the polarization of the other photon. Hybrid entangled photon pairs are created by Spontaneous Parametric Down Conversion and coherent polarization to path conversion for one photon. For that photon, path superposition is analyzed, and polarization superposition for its twin photon. The correlations between these two measurements give an S-parameter of S=2.653+/-0.027 in a CHSH inequality and thus violate local realism for two different DOF by more than 24 standard deviations. This experimentally supports the idea that entanglement is a fundamental concept which is indifferent to the specific physical realization of Hilbert space.
description: 4 pages, 3 figures, typos in Fig.1 corrected
Free energy analyses of cell-penetrating peptides using the weighted ensemble method
Creators: name: Choe, Seungho
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biomolecules (q-bio.BM)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Cell-penetrating peptides (CPPs) have been widely used for drug-delivery agents; however, it has not been fully understood how they translocate across cell membranes. The Weighted Ensemble (WE) method, one of powerful and flexible path sampling techniques, can be helpful to reveal translocation paths and free energy barriers along those paths. Within the WE approach we show how Arg9 (nona-arginine) and Tat interact with a DOPC/DOPG (4:1) model membrane, and we present free energy (or potential mean of forces, PMFs) profiles of penetration, although a translocation across the membrane has not been observed in the current simulations. Two different compositions of lipid molecules were also tried and compared. Our approach can be applied to any CPPs interacting with various model membranes, and it will provide useful information regarding the transport mechanisms of CPPs.
description: 9 pages, 6 figures (w/ Suppl. Info 5 pages, 3 figures)
LostPaw: Finding Lost Pets using a Contrastive Learning-based Transformer with Visual Input
Creators: name: Voinea, Andrei
name: Kock, Robin
name: Dhali, Maruf A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Losing pets can be highly distressing for pet owners, and finding a lost pet is often challenging and time-consuming. An artificial intelligence-based application can significantly improve the speed and accuracy of finding lost pets. To facilitate such an application, this study introduces a contrastive neural network model capable of accurately distinguishing between images of pets. The model was trained on a large dataset of dog images and evaluated through 3-fold cross-validation. Following 350 epochs of training, the model achieved a test accuracy of 90%. Furthermore, overfitting was avoided, as the test accuracy closely matched the training accuracy. Our findings suggest that contrastive neural network models hold promise as a tool for locating lost pets. This paper presents the foundational framework for a potential web application designed to assist users in locating their missing pets. The application will allow users to upload images of their lost pets and provide notifications when matching images are identified within its image database. This functionality aims to enhance the efficiency and accuracy with which pet owners can search for and reunite with their beloved animals.
description: 7 Pages, 7 figures
Los tweets de @bibliotecasCSIC en 2014
Creators: name: Unidad De Recursos De Información Científica Para La Investigación (URICI)
Publisher: name: CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)
Year: 2015
Subjects: Twitter
2014
@bibliotecasCSIC
Bibliotecas del CSIC
Archivos del CSIC
CSIC libraries
CSIC Archives

description: 232 páginas.-- Documento creado el 08/01/2015 en http://tweetbook.in
description: Documento que contiene los tweets publicados en 2014 (1646).
title: Welche Effekte hat IT-Unterstützung im Innovationsmanagement? - Eine strukturierte Meta-Analyse
Creators: name: Poppe, Michael
name: Holz, Felix
name: Dehne, Maria
name: Fellmann, Michael
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2020
Subjects: subject: Systematische Literaturanalyse
subject: Ideenmanagement
subject: Innovations-management
subject: Effekte
subject: Unternehmen
subject: Mitarbeitende
subject: IT-Unterstützung

description: Seit fast 150 Jahren werden in Unternehmen Ideen der Mitar-beitenden zur Verbesserung von Prozessabläufen, Produkten oder Dienstleistungen verwaltet. Durch den technischen Fort-schritt wurde es möglich, dass die Mitarbeitenden ihre Ideen digital von überall einreichen und einsehen sowie Ideen anderer kommentieren und bewerten können. In dieser Arbeit wird mit-tels einer strukturierten Literaturrecherche untersucht, welche Auswirkungen bzw. Effekte auf Unternehmen und auf Mitarbei-tende durch den Einsatz einer solchen IT-Unterstützung bereits festgestellt werden konnten.
Ortho-Radial Drawing in Near-Linear Time
Creators: name: Chang, Yi-Jun
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computational Geometry (cs.CG)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: An orthogonal drawing is an embedding of a plane graph into a grid. In a seminal work of Tamassia (SIAM Journal on Computing 1987), a simple combinatorial characterization of angle assignments that can be realized as bend-free orthogonal drawings was established, thereby allowing an orthogonal drawing to be described combinatorially by listing the angles of all corners. The characterization reduces the need to consider certain geometric aspects, such as edge lengths and vertex coordinates, and simplifies the task of graph drawing algorithm design.
 Barth, Niedermann, Rutter, and Wolf (SoCG 2017) established an analogous combinatorial characterization for ortho-radial drawings, which are a generalization of orthogonal drawings to cylindrical grids. The proof of the characterization is existential and does not result in an efficient algorithm. Niedermann, Rutter, and Wolf (SoCG 2019) later addressed this issue by developing quadratic-time algorithms for both testing the realizability of a given angle assignment as an ortho-radial drawing without bends and constructing such a drawing.
 In this paper, we further improve the time complexity of these tasks to near-linear time. We establish a new characterization for ortho-radial drawings based on the concept of a good sequence. Using the new characterization, we design a simple greedy algorithm for constructing ortho-radial drawings.
description: 53 pages. This is the TheoretiCS journal version
An updated Gamma Ray Bursts Hubble diagram
Creators: name: Cardone, V. F.
name: Capozziello, S.
name: Dainotti, M. G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Gamma ray bursts (GRBs) have recently attracted much attention as a possible way to extend the Hubble diagram to very high redshift. To this aim, the luminosity (or isotropic emitted energy) of a GRB at redshift z must be evaluated from a correlation with a distance independent quantity so that one can then solve for the luminosity distance D_L(z) and hence the distance modulus mu(z). Averaging over five different two parameters correlations and using a fiducial cosmological model to calibrate them, Schaefer (2007) has compiled a sample of 69 GRBs with measured mu(z) which has since then been widely used to constrain cosmological parameters. We update here that sample by many aspects. First, we add a recently found correlation for the X - ray afterglow and use a Bayesian inspired fitting method to calibrate the different GRBs correlations known insofar assuming a fiducial LCDM model in agreement with the recent WMAP5 data. Averaging over six correlations, we end with a new GRBs Hubble diagram comprising 83 objects. We also extensively explore the impact of varying the fiducial cosmological model considering how the estimated mu(z) change as a function of the $(Ω_M, w_0, w_a)$ parameters of the Chevallier - Polarski - Linder phenomenological dark energy equation of state. In order to avoid the need of assuming an {\it a priori} cosmological model, we present a new calibration procedure based on a model independent local regression estimate of mu(z) using the Union SNeIa sample to calibrate the GRBs correlations. This finally gives us a GRBs Hubble diagram made out of 69 GRBs whose estimated distance modulus mu(z) is almost independent on the underlying cosmological model.
description: version accepted for publication on MNRAS; 19 pages, 8 figures, 4 tables; contains two new sections on the analysis of systematic errors and cosmological constraints using present day and forecasts on future data
Improving gearshift controllers for electric vehicles with reinforcement learning
Creators: name: Beaudoin, Marc-Antoine
name: Boulet, Benoit
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: During a multi-speed transmission development process, the final calibration of the gearshift controller parameters is usually performed on a physical test bench. Engineers typically treat the mapping from the controller parameters to the gearshift quality as a black-box, and use methods rooted in experimental design -- a purely statistical approach -- to infer the parameter combination that will maximize a chosen gearshift performance indicator. This approach unfortunately requires thousands of gearshift trials, ultimately discouraging the exploration of different control strategies. In this work, we calibrate the feedforward and feedback parameters of a gearshift controller using a model-based reinforcement learning algorithm adapted from Pilco. Experimental results show that the method optimizes the controller parameters with few gearshift trials. This approach can accelerate the exploration of gearshift control strategies, which is especially important for the emerging technology of multi-speed transmissions for electric vehicles.
Spectral theory for a mathematical model of the weak interaction: The decay of the intermediate vector bosons W+/-. I
Creators: name: Barbaroux, J. -M.
name: Guillot, J. -C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81V35; 35P05; 35Q40

description: We consider a Hamiltonian with cutoffs describing the weak decay of spin one massive bosons into the full family of leptons. The Hamiltonian is a self-adjoint operator in an appropriate Fock space with a unique ground state. We prove a Mourre estimate and a limiting absorption principle above the ground state energy and below the first threshold for a sufficiently small coupling constant. As a corollary, we prove absence of eigenvalues and absolute continuity of the energy spectrum in the same spectral interval.
description: Correction of minor misprints
On the regularization of the constraints algebra of Quantum Gravity in 2+1 dimensions with non-vanishing cosmological constant
Creators: name: Perez, Alejandro
name: Pranzetti, Daniele
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We use the mathematical framework of loop quantum gravity (LQG) to study the quantization of three dimensional (Riemannian) gravity with positive cosmological constant (Lambda>0). We show that the usual regularization techniques (successful in the Lambda=0 case and widely applied in four dimensional LQG) lead to a deformation of the classical constraint algebra (or anomaly) proportional to the local strength of the curvature squared. We argue that this is an unavoidable consequence of the non-local nature of generalized connections.
description: Minor corrections, figures improved and references added
Minimax quantum state discrimination
Creators: name: D'Ariano, Giacomo Mauro
name: Sacchi, Massimiliano Federico
name: Kahn, Jonas
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive the optimal measurement for quantum state discrimination without a priori probabilities, i.e. in a minimax strategy instead of the usually considered Bayesian one. We consider both minimal-error and unambiguous discrimination problems, and provide the relation between the optimal measurements according to the two schemes. We show that there are instances in which the minimum risk cannot be achieved by an orthogonal measurement, and this is a common feature of the minimax estimation strategy.
description: 5 pages, no figures; the title is changed. Some improvements. Corollary 1 has been corrected (now Remark 1). Phys. Rev. A in press
Solving the main cosmological puzzles with a generalized time varying vacuum energy
Creators: name: Basilakos, Spyros
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
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: We study the dynamics of the FLRW flat cosmological models in which the vacuum energy density varies with time, $Λ(t)$. In particular, we investigate the dynamical properties of a generalized vacuum model and we find that under certain conditions the vacuum term in the radiation era varies as $Λ(z) \propto (1+z)^{4}$, while in the matter era we have $Λ(z)\propto (1+z)^{3}$ up to $z\simeq 3$ and $Λ(z)=Λ$ for $z\le 3$. The confirmation of such a behavior would be of paramount importance because it could provide a solution to the cosmic coincidence problem as well as to the fine tuning problem, without changing the well known (from the concordance $Λ$ cosmology) Hubble expansion.
description: 9 pages, 2 figures, Accepted for publication by Astronomy and Astrophysics
The Estimation of Fundamental Physics Parameters for Fermi-LAT Blazars
Creators: name: Pei, Zhiyuan
name: Fan, Junhui
name: Yang, Jianghe
name: Huang, Danyi
name: Li, Ziyan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Aiming to delineate the physical framework of blazars, we present an effective method to estimate four important parameters based on the idea proposed by \citet{BK95}, including the upper limit of central black hole mass $M$, the Doppler factor $δ$, the distance along the axis to the site of the $γ$-ray production $d$ (which then can be transformed into the location of $γ$-ray-emitting region $R_γ$) and the propagation angle with respect to the axis of the accretion disk $Φ$. To do so, we adopt an identical sample with 809 {\it Fermi}-LAT-detected blazars which had been compiled in \citet{Pei20PASA}. These four derived parameters stepping onto the stage may shed new light on our knowledge regarding $γ$-ray blazars. With regard to the paper of \citet{BK95}, we obtain several new perspectives, mainly in: (1) putting forward an updated demarcation between BL Lacs and FSRQs based on the relation between broad-line region luminosity and disk luminosity both measured in Eddington units, i.e., $L_{\rm disk}/L_{\rm Edd}=4.68\times10^{-3}$, indicating that there are some differences between BL Lacs and FSRQs on the accretion power in the disk; (2) proposing that there is a so-called `appareling zone', a potential transition field between BL Lacs and FSRQs where the changing-look blazars perhaps reside; (3) the location of $γ$-ray emission region is principally constrained outside the broad-line region, and for some BL Lacs are also away from the dusty molecular torus, which means the importance of emission components in the jet.
description: 24 pages, 9 figures, Accepted to ApJ
title:  Influences of Pre-Columbian Art in the Work of Eduardo Ramírez Villamizar
Creators: name: Lam, June-Marie
Publisher: name: Old Dominion University Libraries
Year: 1987

description: Eduardo Ramirez Villamizar is a twentieth century Colombian sculptor who is, like many of his contemporaries, intent on the creation of art that is particularly Latin American in character. In pursuit of this goal, he relies on an innate spirituality and on inspiration from his visual memory. His work demonstrates an unconscious bond with artists of the Pre-Columbian societies and shows a recognized appreciation of their techniques of visual expression.

An overview of Pre-Columbian art and culture, as well as a review of the development of Latin American art with special emphasis on the art of Colombia, provide a basis for comparison of Pre-Columbian works with the sculpture of Ramirez Villamizar.

Carl Jung's theory of creativity is used to explain a propensity for particular forms that the Pre-Columbian artist and Ramirez Villamizar hold in common. Since, in both cases, the goal is the expression of that which is felt rather than that which is seen, the transformation of natural form is the preferred means of expression.

Selected works, many seen and photographed by the author, are used to demonstrate the shared preference for simplification of form, monumentality, and ambiguous surface treatment. The symbolic shell shape, as used by Ramirez Villamizar, is discussed and emphasis is placed on the philosophical and visual integration of art forms.
Additional file 7 of Super-enhancer-associated TMEM44-AS1 aggravated glioma progression by forming a positive feedback loop with Myc
Creators: name: Bian, Erbao
name: Chen, Xueran
name: Cheng, Li
name: Cheng, Meng
name: Chen, Zhigang
name: Yue, Xiaoyu
name: Zhang, Zhengwei
name: Chen, Jie
name: Sun, Libo
name: Huang, Kebing
name: Huang, Cheng
name: Fang, Zhiyou
name: Zhao, Bing
name: Li, Jun
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 7:.