cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Radiowave Hunt for Young Stellar Object Emission and Demographics (RADIOHEAD): A Radio Luminosity${-}$Spectral Type Dependence in Taurus${-}$Auriga YSOs
Creators: name: Rahman, Ramisa Akther
name: Lovell, Joshua Bennett
name: Koch, Eric W.
name: Wilner, David J.
name: Andrews, Sean M.
name: Monsch, Kristina
name: Ha, Dan
Publisher: name: arXiv
Year: 2025
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We measure the radio continuum fluxes at the locations of all Gaia${-}$confirmed members of Taurus${-}$Auriga using Karl G. Jansky Very Large Array Sky Survey data (VLASS; 2${-}$4 GHz, $σ_{\rm{VLASS}}{\sim}110{-}140 μ$Jy, $2.5''$ resolution) spanning 3 VLASS epochs (2019, 2021, and 2023). We present 35 detections coincident with young Taurus${-}$Auriga stars (29 in individual VLASS images, 6 via stacking). We find a strong dependence on spectral type, wherein the fractional detection rate of radio emission coincident with early-type young stellar objects (YSOs) is systematically higher than late-type YSOs, ranging from 25% $\pm$ 13% for B${-}$F YSOs, 21% $\pm$ 11% for G YSOs, 18.4% $\pm$ 6.3% for K0${-}$K4 YSOs, 15.5% $\pm$ 5.4% for K5${-}$K9 YSOs, 7.0% $\pm$ 2.7% for M0${-}$M2 YSOs, 2.3% $\pm$ 0.9% for M3${-}$M6 YSOs, and 1.9% $\pm$ 1.9% for YSOs with SpTs later than M7. We present cumulative density distributions of radio luminosity densities that demonstrate a significant luminosity enhancement for early- versus late-type YSOs. We find 25% of the detected sources to be significantly variable. We discuss possible interpretations of this dependence, which may reflect stellar magnetic activity, binary interactions, or stellar flaring. We find that mid-infrared YSO class is a strong indicator of radio detectability consistent with higher frequency Taurus-Auriga VLA surveys, with class III stars detected at a rate of 8.8% $\pm$ 1.6%, class IIs at 2.0% $\pm$ 1.2%, and combined class 0s, Is and Fs at 8.0% $\pm$ 5.4%.
description: Accepted for publication in ApJ. 26 pages, inc. 12 figures, 3 tables
Why U.S. Money does not Cause U.S. Output, but does Cause Hong Kong Output
Creators: name: Rodriguez, Gabriel
name: Rowe, Nicholas
Publisher: name: My University
Year: 2002
Subjects: Monetary Policy
Causality
VECM
U.S. Money
U.S. Federal Funds Rate

description: Standard econometric tests for whether money causes output will be meaningless if monetary policy is chosen optimally to smooth fluctuations in output. If U.S. monetary policy were chosen to smooth U.S. output, we show that U.S. money will not Granger cause U.S. output. Indeed, as shown by Rowe and Yetman (2000), if there is a (say) 6 quarter lag in the effect of money on output, then U.S. output will be unforecastable from any information set available to the Fed lagged 6 quarters. But if other countries, for example Hong Kong, have currencies that are fixed to the U.S. dollar, Hong Kong monetary policy will then be chosen in Washington D.C., with no concern for smoothing Hong Kong output. Econometric causality tests of U.S. money on Hong Kong output will then show evidence of causality. We test this empirically. Our empirical analysis also provides a measure of the degree to which macroeconomic stabilisation is sacrificed by adopting a fixed exchange rate rather than an independent monetary policy.
Single cell atlas for several mammals, reptiles and birds
Creators: name: 佳成 朱
Publisher: name: CNGB
Year: 2021
Subjects: Transcriptome or Gene expression
Multispecies

description: We established the broadest single-nucleus RNA sequencing study to date, covering 11 representative species, including pets (cat, dog, hamster, and lizard), livestock (goat and rabbit), poultry (duck and pigeon), and wildlife (pangolin, tiger, and deer)
Deformed Boson Algebras and $\mathcal{W}_{α,β,ν}$-Coherent States: A New Quantum Framework
Creators: name: Droghei, Riccardo
Publisher: name: arXiv
Year: 2025
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 81R30, 26A33, 33E12, 33E20

description: We introduce a novel class of coherent states, termed $\mathcal{W}^{(\barα,\barν)}(z)$-coherent states, constructed using a deformed boson algebra based on the generalized factorial $[n]_{α,β,ν}!$. This algebra extends conventional factorials, incorporating advanced special functions such as the Mittag-Leffler and Wright functions, enabling the exploration of a broader class of quantum states. The mathematical properties of these states, including their continuity, completeness, and quantum fluctuations, are analyzed. A key aspect of this work is the resolution of the Stieltjes moment problem associated with these states, achieved through the inverse Mellin transformation method. The framework provides insights into the interplay between classical and quantum regimes, with potential applications in quantum optics and fractional quantum mechanics. By extending the theoretical landscape of coherent states, this study opens avenues for further exploration in mathematical physics and quantum technologies.
description: 18 pages, 6 figures
Non-Uniform Structure of Matter and the Equation of State
Creators: name: Maruyama, Toshiki
name: Chiba, Satoshi
name: Tatsumi, Toshitaka
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the non-uniform structures and the equation of state (EOS) of nuclear matter in the context of the first-order phase transitions (FOPT) such as liquid-gas phase transition, kaon condensation, and hadron-quark phase transition. During FOPT the mixed phases appear, where matter exhibits non-uniform structures called ``Pasta'' structures due to the balance of the Coulomb repulsion and the surface tension between two phases. We treat these effects self-consistently, properly taking into account of the Poisson equation and the Gibbs conditions. Consequently, they make the EOS of the mixed phase closer to that of Maxwell construction due to the Debye screening. This is a general feature of the mixed phase consisting of many species of charged particles.
description: Invited talk at "Nuclear Dynamics in Heavy-ion Reactions and Neutron Stars", Beijing, July 10-14, 2007
Understanding the 'Healthy Immigrant Effect' in Canada
Creators: name: Deri, Catherine
Publisher: name: My University
Year: 2005
Subjects: Immigration
Health
Santé

description: The ‘Healthy Immigrant Effect’ (HIE), as it is dubbed in the social science literature, is the finding that recent immigrants are healthier than the average locally born resident but that over time this health advantage declines. In the existing literature, this phenomenon is documented using only cross section data. The limiting problem with drawing conclusions about immigrant health dynamics from a cross section alone is that a researcher cannot separately identify changes in health with each year that an immigrant spends in a host country from fixed differences between entry cohorts. In this paper, I exploit the panel nature of the Canadian National Population Health Survey to document the HIE using four measures of health including both subjective and objective measures. I find evidence of the HIE, for all measures of health I consider. Further, interesting patterns emerge for different cuts of the data. Age at immigration and sex matter. The HIE is a phenomenon affecting only those that immigrate at older ages. As well, I find that the HIE affects both men and women, but the effects are found in different measures of health. / Tel que nommée dans la littérature des sciences sociales «l'effet de l'immigrant en bonne santé» (EIBS), est la découverte que les immigrants récents sont en meilleure santé comparés aux résidents nés localement, mais au fils du temps cet avantage de santé diminue. Dans la littérature courante, ce phénomène est documenté en utilisant des enquêtes ponctuelles. Le problème limitant de prendre des conclusions sur la dynamique de la santé des immigrants d’une enquête ponctuelle est que le chercheur ne peut identifier séparément les changements de santé avec chaque année que l’immigrant passe dans son pays d’hôte des différences fixes entre les cohortes d’entrées. Dans cet article, j’exploite la nature panel de l’Enquête nationale sur la santé de la population Canadienne pour documenter l’EIBS en utilisant quatre mesures de santé, incluant des mesures subjectives et objectives. Je trouve de l’évidence de l’EIBS pour toutes les mesures de santé que je considère. De plus, des tendances intéressantes émergent pour différents sous-groupes de la population. L’age d’immigration et le sexe ont de l’importance. L’EIBS est un phénomène qui affecte seulement ceux qui immigrent à un age plus élevées. Aussi, je trouve que l’EIBS affecte les hommes et les femmes, mais les effets sont trouvées dans différentes mesures de santé.
Hold On! Is My Feedback Useful? Evaluating the Usefulness of Code Review Comments
Creators: name: Ahmed, Sharif
name: Eisty, Nasir U.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Context: In collaborative software development, the peer code review process proves beneficial only when the reviewers provide useful comments. Objective: This paper investigates the usefulness of Code Review Comments (CR comments) through textual feature-based and featureless approaches. Method: We select three available datasets from both open-source and commercial projects. Additionally, we introduce new features from software and non-software domains. Moreover, we experiment with the presence of jargon, voice, and codes in CR comments and classify the usefulness of CR comments through featurization, bag-of-words, and transfer learning techniques. Results: Our models outperform the baseline by achieving state-of-the-art performance. Furthermore, the result demonstrates that the commercial gigantic LLM, GPT-4o, or non-commercial naive featureless approach, Bag-of-Word with TF-IDF, is more effective for predicting the usefulness of CR comments. Conclusion: The significant improvement in predicting usefulness solely from CR comments escalates research on this task. Our analyses portray the similarities and differences of domains, projects, datasets, models, and features for predicting the usefulness of CR comments.
description: Accepted for publication in Empirical Software Engineering (EMSE) Journal
Constraints on Cosmological Parameters from the Angular Power Spectrum of a Combined 2500 deg$^2$ SPT-SZ and Planck Gravitational Lensing Map
Creators: name: Simard, G.
name: Omori, Y.
name: Aylor, K.
name: Baxter, E. J.
name: Benson, B. A.
name: Bleem, L. E.
name: Carlstrom, J. E.
name: Chang, C. L.
name: Cho, H-M.
name: Chown, R.
name: Crawford, T. M.
name: Crites, A. T.
name: de Haan, T.
name: Dobbs, M. A.
name: Everett, W. B.
name: George, E. M.
name: Halverson, N. W.
name: Harrington, N. L.
name: Henning, J. W.
name: Holder, G. P.
name: Hou, Z.
name: Holzapfel, W. L.
name: Hrubes, J. D.
name: Knox, L.
name: Lee, A. T.
name: Leitch, E. M.
name: Luong-Van, D.
name: Manzotti, A.
name: McMahon, J. J.
name: Meyer, S. S.
name: Mocanu, L. M.
name: Mohr, J. J.
name: Natoli, T.
name: Padin, S.
name: Pryke, C.
name: Reichardt, C. L.
name: Ruhl, J. E.
name: Sayre, J. T.
name: Schaffer, K. K.
name: Shirokoff, E.
name: Staniszewski, Z.
name: Stark, A. A.
name: Story, K. T.
name: Vanderlinde, K.
name: Vieira, J. D.
name: Williamson, R.
name: Wu, W. L. K.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report constraints on cosmological parameters from the angular power spectrum of a cosmic microwave background (CMB) gravitational lensing potential map created using temperature data from 2500 deg$^2$ of South Pole Telescope (SPT) data supplemented with data from Planck in the same sky region, with the statistical power in the combined map primarily from the SPT data. We fit the corresponding lensing angular power spectrum to a model including cold dark matter and a cosmological constant ($Λ$CDM), and to models with single-parameter extensions to $Λ$CDM. We find constraints that are comparable to and consistent with constraints found using the full-sky Planck CMB lensing data. Specifically, we find $σ_8 Ω_{\rm m}^{0.25}=0.598 \pm 0.024$ from the lensing data alone with relatively weak priors placed on the other $Λ$CDM parameters. In combination with primary CMB data from Planck, we explore single-parameter extensions to the $Λ$CDM model. We find $Ω_k = -0.012^{+0.021}_{-0.023}$ or $M_ν< 0.70$eV both at 95% confidence, all in good agreement with results that include the lensing potential as measured by Planck over the full sky. We include two independent free parameters that scale the effect of lensing on the CMB: $A_{L}$, which scales the lensing power spectrum in both the lens reconstruction power and in the smearing of the acoustic peaks, and $A^{ϕϕ}$, which scales only the amplitude of the CMB lensing reconstruction power spectrum. We find $A^{ϕϕ} \times A_{L} =1.01 \pm 0.08$ for the lensing map made from combined SPT and Planck temperature data, indicating that the amount of lensing is in excellent agreement with what is expected from the observed CMB angular power spectrum when not including the information from smearing of the acoustic peaks.
description: 12 pages, 7 figures, submitted to ApJ, typo in bandpower table corrected
Nonparametric estimation of the multivariate Spearman's footrule: a further discussion
Creators: name: Pérez, Ana
name: Prieto-Alaiz, Mercedes
name: Chamizo, Fernando
name: Liebscher, Eckhard
name: Úbeda-Flores, Manuel
Publisher: name: arXiv
Year: 2025
Subjects: subject: Statistics Theory (math.ST)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: In this paper, we propose two new estimators of the multivariate rank correlation coefficient Spearman's footrule which are based on two general estimators for Average Orthant Dependence measures. We compare the new proposals with a previous estimator existing in the literature and show that the three estimators are asymptotically equivalent, but, in small samples, one of the proposed estimators outperforms the others. We also analyse Pitman efficiency of these indices to test for multivariate independence as compared to multivariate versions of Kendall's tau and Spearman's rho.
description: A thorough review of the work is required to correct errors and improve clarity
Generic autonomous system approach to interacting dark energy models
Creators: name: Shah, Parth
name: Samanta, Gauranga C.
name: Bamba, Kazuharu
name: Myrzakulov, R.
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore an autonomous system analysis of dark energy models with interactions between dark energy and cold dark matter in a general systematic approach to cosmological fluids. We investigate two types of models such as local and non-local ones. In particular, a local form of interaction is directly proportional to only the energy density, while a non-local interaction is directly proportional to the energy density as well as the Hubble parameter. As a consequence, it is explicitly demonstrated that in both cases there exist the stability points in terms of cosmological parameters. This work aims at obtaining acceleration and stability using interaction models without modifying the matter or geometric component of the Universe.
description: 12 pages, 9 figures
Dual formulation of covariant nonlinear duality-symmetric action of kappa-symmetric D3-brane
Creators: name: Vanichchapongjaroen, Pichet
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the construction of covariant nonlinear duality-symmetric actions in dual formulation. Essentially, the construction is the PST-covariantisation and nonlinearisation of Zwanziger action. The covariantisation made use of three auxiliary scalar fields. Apart from these, the construction proceed in a similar way to that of the standard formulation. For example, the theories can be extended to include interactions with external fields, and that the theories possess two local PST symmetries. We then explicitly demonstrate the construction of covariant nonlinear duality-symmetric actions in dual formulation of DBI theory, and D3-brane. For each of these theories, the twisted self-duality condition obtained from duality-symmetric actions are explicitly shown to match with the duality relation between field strength and its dual from the one-potential actions. Their on-shell actions between the duality-symmetric and the one potential versions are also shown to match. We also explicitly prove kappa-symmetry of the covariant nonlinear duality-symmetric D3-brane action in dual formulation.
description: 26 pages, typos corrected, references added
Analysis of n-Dimensional Quadtrees using the Hausdorff Fractal Dimension
Creators: name: Faloutsos, Christos
name: Gaede, Volker
Publisher: name: Carnegie Mellon University
Year: 2003
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: There is mounting evidence [Man77, Sch91] that real datasets are statistically self-similar, and thus, `fractal'. This is an important insight since it permits a compact statistical description of spatial datasets; subsequently, as we show, it also forms the basis for the theoretical analysis of spatial access methods, without using the typical, but unrealistic, uniformity assumption. In this paper, we focus on the estimation of the number of number of quadtree blocks that a real, spatial dataset will require. Using the the well-known Hausdorff fractal dimension, we derive some closed formulas which allow us to predict the number of quadtree blocks, given some few parameters. Using our formulas, it is possible to predict the space overhead and the response time of linear quadtrees/z-orderings [OM88], which are widely used in practice. In order to verify our analytical model, we performed an extensive experimental investigation using several real datasets coming from different domains. In these experiments, we found that our analytical model agrees well with our experiments as well as with older empirical observations on 2-d [Gae95b] and 3-d [ACF+94] data.
Identifikation und Analyse von technologischen Trends für die berufliche Weiterbildung. Ergebnisse
Creators: name: Keicher, Lukas
name: Beichter, Tim
name: Kaiser, Manuel
name: Pallaks, Manuel
name: :Unav
Publisher: name: Fraunhofer-Gesellschaft
Year: 2021
Subjects: Technologische Trends
Trendanalyse
Trendforschung
Berufliche Weiterbildung
Educational Technologies
EdTech

description: Diese Publikation zeigt anhand von Educational Technologies ("EdTech"), wie der "Leitfaden zur Identifikation und Analyse von technologischen Trends für die berufliche Weiterbildung" angewendet werden kann. Hiermit soll Unternehmen sowohl eine konkrete Methode zum systematischen Trendmonitoring an die Hand gegeben, als auch anhand des EdTech-Beispiels deren Anwendung aufgezeigt werden. Im Rahmen der Publikation werden die beiden Teilgebiete Künstliche Intelligenz und Interaktionstechnologien näher beleuchtet und es werden verschiedene Szenarien für den Schlüsseltrend der Künstlichen Intelligenz erarbeitet. Diese sollen Organisationen bei der Entwicklung von erfolgreichen Strategien unterstützen.
Galaxy Formation in Sterile Neutrino Dark Matter Models
Creators: name: Menci, N.
name: Grazian, A.
name: Lamastra, A.
name: Calura, F.
name: Castellano, M.
name: Santini, P.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate galaxy formation in models with dark matter (DM) constituted by sterile neutrinos. Given their large parameter space, defined by the combinations of sterile neutrino mass $m_ν$ and mixing parameter $\sin^2(2θ)$ with active neutrinos, we focus on models with $m_ν=7$ keV, consistent with the tentative 3.5 keV line detected in several X-ray spectra of clusters and galaxies. We consider i) two resonant production models with $\sin^2(2θ)=5\,10^{-11}$ and $\sin^2(2θ)=2\,10^{-10}$, to cover the range of mixing parameter consistent with the 3.5 keV line; ii) two scalar-decay models, representative of the two possible cases characterizing such a scenario: a freeze-in and a freeze-out case. We also consider thermal Warm Dark Matter with particle mass $m_X=3$ keV. Using a semi-analytic model, we compare the predictions for the different DM scenarios with a wide set of observables. We find that comparing the predicted evolution of the stellar mass function, the abundance of satellites of Milky Way-like galaxies, and the global star formation history of galaxies with observations does not allow to disentangle the effects of the baryonic physics from those related to the different DM models. On the other hand, the distribution of the stellar-to-halo mass ratios, the abundance of faint galaxies in the UV luminosity function at $z\gtrsim 6$, and the specific star formation and age distribution of local, low-mass galaxies constitute potential probes for the considered DM scenarios. We discuss how next observations with upcoming facilities will enable to rule out or to strongly support DM models based on sterile neutrinos.
description: 21 pages, accepted for publication in The Astrophysical Journal
title: CO J = 3-]2 OBSERVATIONS OF IRC +10216
Creators: name: TAUBER, JA
name: KWAN, J
name: GOLDSMITH, PF
name: Snell, RL
name: Erickson, NR
Publisher: name: University of Massachusetts Amherst
Year: 1989
Subjects: subject: Astrophysics and Astronomy

description: The published version is located at http://adsabs.harvard.edu/full/1989AJ.....97..236T
description: New observations of the CO J = 3-2 emission in the circumstellar envelope of IRC +10216 are presented. Strips maps of this source have been obtained at 0.5 arcmin spacing with an optical telescope, which allows the beam pattern to be determined very accurately. The observations are compared with the predictions of the standard thermal model of Kwan and Linke (1982), and the model and the observations are found to agree very well. However, the model predicts that the effective J = 3-2 source is much smaller than the beam size. It is concluded that the observations cannot further constrain the input parameters of the Kwan and Linke model.
Effect of lithium hydride on the cooling of primordial gas
Creators: name: Liu, Boyuan
name: Bromm, Volker
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We complete the formulation of the standard model of first star formation by exploring the possible impact of $\mathrm{LiH}$ cooling, which has been neglected in previous simulations of non-linear collapse. Specifically, we find that at redshift $z\gtrsim 5$, the cooling by $\mathrm{LiH}$ has no effect on the thermal evolution of shocked primordial gas, and of collapsing primordial gas into minihaloes or relic HII regions, even if the primordial lithium abundance were enhanced by one order of magnitude. Adding the most important lithium species to a minimum network of primordial chemistry, we demonstrate that insufficient $\mathrm{LiH}$ is produced in all cases considered, about $[\mathrm{LiH/Li}]\sim 10^{-9}$ for $T\lesssim 100$ K. Indeed, $\mathrm{LiH}$ cooling would only be marginally significant in shocked primordial gas for the highly unlikely case that the $\mathrm{LiH}$ abundance were increased by nine orders of magnitude, implying that $all$ lithium would have to be converted into $\mathrm{LiH}$. In this study, photo-destruction processes are not considered, and the collisional disassociation rate of $\mathrm{LiH}$ is possibly underestimated, rendering our results an extreme upper limit. Therefore, the cooling by $\mathrm{LiH}$ can safely be neglected for the thermal evolution of Population~III star-forming gas.
description: 10 pages, 7 figures, Accepted for publication in MNRAS, Changes: The implementation of the HD cooling function is changed without affecting the results, and the critical densities of molecular coolants are corrected (Section 2.2). A comment on the effect of LiH cooling in the high density regime is included (Section 3.1.3)
How Information Science Helped to Shape the Emerging Field of Terminology in Canada (1973–81)
Creators: name: Bowker, Lynne
Publisher: name: My University
Year: 2017
Subjects: terminology
translation
methodology
Canada
history

description: As the field of terminology began to take shape in Canada in the 1970s and early 1980s, it became clear that traditional linguistics methods were not sufficient to support this new field of activity. Following an analysis of five seminal Canadian French language works on terminology published during this period, we illustrate that information science had a significant influence on the development of terminology methodology by contributing ideas relating to information literacy, referencing, knowledge organization, and controlled vocabularies.
Chaos-based Potentials in the One-dimensional Tight-binding Model Probed by the Inverse Participation Ratio
Creators: name: de Oliveira, Weslley Florentino
name: Pellegrino, Giancarlo Queiroz
Publisher: name: arXiv
Year: 2017
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Chaos-based potentials are defined and implemented in the one-dimensional tight-binding model as a way of simulating disorder-controlled crystalline lattices. In this setting, disorder is handled with the aid of the chaoticity parameter. The inverse participation ratio $(IPR)$ probes the response of the system to three different such potentials and shows consistent agreement with results given by the Lyapunov exponent $Ly$: the greater $Ly(r)$ for the chaotic sequence as a function of the chaoticity parameter $r$, the greater the asymptotic value $IPR(r)$ for the large-system ground state.
description: 18 pages, 7 figures, article accepted for publication in Computational and Applied Mathematics
Analysis of Cycle Stealing with Switching Times and Thresholds
Creators: name: Osogami, Takayuki
name: Harchol-Balter, Mor
name: Wolf, Alan
Publisher: name: Carnegie Mellon University
Year: 1971
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: We consider two processors, each serving its own M/GI/1 queue, where one of the processors (the “donor”) can help the other processor (the “beneficiary”) with its jobs, during times when the donor processor is idle. That is the beneficiary processor “steals idle cycles” from the donor processor. There is a switching time required for the donor processor to start working on the beneficiary jobs, as well as a switching back time. We also allow for threshold constraints on both the beneficiary and donor sides, whereby the decision to help is based not only on idleness but also on satisfying threshold criteria in the number of jobs. We analyze the mean response time for the donor and beneficiary processors. Our analysis is approximate, but can be made as accurate as desired, and is validated via simulation. Results of the analysis illuminate principles on the general benefits of cycle stealing and the design of cycle stealing policies.
Long-term millimeter VLBI monitoring of M87 with KVN at milliarcsecond resolution: nuclear spectrum
Creators: name: Kim, Jae-Young
name: Lee, Sang-Sung
name: Hodgson, Jeffrey A.
name: Algaba, Juan-Carlos
name: Zhao, Guang-Yao
name: Kino, Motoki
name: Byun, Do-Young
name: Kang, Sincheol
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the centimeter- to millimeter-wavelength synchrotron spectrum of the core of the radio galaxy M87 at $\lesssim0.8\,{\rm mas}~\sim110R_{s}$ spatial scales using four years of fully simultaneous, multi-frequency VLBI data obtained by the Korean VLBI Network (KVN). We find a core spectral index $α$ of $\gtrsim-0.37$ ($S\propto ν^{+α}$) between 22GHz and 129GHz. By combining resolution-matched flux measurements from the Very Long Baseline Array (VLBA) at 15GHz and taking the Event Horizon Telescope (EHT) 230GHz core flux measurements in epochs 2009 and 2012 as lower limits, we find evidence of a nearly flat core spectrum across 15GHz and 129GHz, which could naturally connect the 230GHz VLBI core flux. The extremely flat spectrum is a strong indication that the jet base does not consist of a simple homogeneous plasma, but of inhomogeneous multi-energy components, with at least one component with the turn-over frequency $\gtrsim100$GHz. The spectral shape can be qualitatively explained if both the strongly (compact, optically thick at $>$100GHz) and the relatively weakly magnetized (more extended, optically thin at $
description: 5 pages, 5 figures, accepted for A&A letters
Absence of diode effect in chiral type-I superconductor NbGe2
Creators: name: Li, Dong
name: Lu, Zouyouwei
name: Cheng, Wenxin
name: Shi, Xiaofan
name: Hu, Lihong
name: Ma, Xiaoping
name: Liu, Yue
name: Itahashi, Yuki M.
name: Shitaokoshi, Takashi
name: Li, Peiling
name: Zhang, Hua
name: Liu, Ziyi
name: Qu, Fanming
name: Shen, Jie
name: Chen, Qihong
name: Jin, Kui
name: Cheng, Jinguang
name: Hänisch, Jens
name: Yang, Huaixin
name: Liu, Guangtong
name: Lu, Li
name: Dong, Xiaoli
name: Iwasa, Yoshihiro
name: Hu, Jiangping
Publisher: name: arXiv
Year: 2025
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Symmetry elegantly governs the fundamental properties and derived functionalities of condensed matter. For instance, realizing the superconducting diode effect (SDE) demands breaking space-inversion and time-reversal symmetries simultaneously. Although the SDE is widely observed in various platforms, its underlying mechanism remains debated, particularly regarding the role of vortices. Here, we systematically investigate the nonreciprocal transport in the chiral type-I superconductor NbGe2. Moreover, we induce type-II superconductivity with elevated superconducting critical temperature on the artificial surface by focused ion beam irradiation, enabling control over vortex dynamics in NbGe2 devices. Strikingly, we observe negligible diode efficiency (Q < 2%) at low magnetic fields, which rises significantly to Q ~ 50% at high magnetic fields, coinciding with an abrupt increase in vortex creep rate when the superconductivity of NbGe2 bulk is suppressed. These results unambiguously highlight the critical role of vortex dynamics in the SDE, in addition to the established symmetry rules.
The $1/N$ expansion of the symmetric traceless and the antisymmetric tensor models in rank three
Creators: name: Benedetti, Dario
name: Carrozza, Sylvain
name: Gurau, Razvan
name: Kolanowski, Maciej
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 57Q99, 05C30, 81T18

description: We prove rigorously that the symmetric traceless and the antisymmetric tensor models in rank three with tetrahedral interaction admit a $1/N$ expansion, and that at leading order they are dominated by melon diagrams. This proves the recent conjecture of I. Klebanov and G. Tarnopolsky in JHEP 10 (2017) 037 [arXiv:1706.00839], which they checked numerically up to 8th order in the coupling constant.
description: 40 pages, many figures
O Projeto Rios como ferramenta na Educação Ambiental: Monitorização do rio Fervença – Bragança
Creators: name: Mafra, Paulo
name: Moreno, Márcia
Publisher: name: Instituto Politécnico de Bragança
Year: 2017

description: O Projeto Rios visa a participação social na conservação dos espaços fluviais. Pretende-se que as pessoas estabeleçam uma relação de proximidade com os rios e de defesa dos ecossistemas ribeirinhos. É utilizada uma metodologia em que são analisados diversos parâmetros fisico-químicos e biológicos. Através desta metodologia foi realizada uma monitorização no rio Fervença com alunos do curso de Educação Ambiental, em dois pontos; um localizado em meio urbano e outro em meio rural. Analisados os resultados, verifica-se que o troço urbano apresenta parâmetros de qualidade inferior ao troço do meio rural. Apresentam-se algumas causas que levam a estes resultados. Com esta metodologia é possível envolver os alunos na identificação de problemas ambientais e na proposta de possíveis soluções, podendo ser colocada em prática uma educação ambiental não formal, que igualmente contribui para a aquisição de conhecimentos, competências curriculares e ambientais, assim como para a aquisição de atitudes e comportamentos a favor do ambiente. Palavras-chave: Educação Ambiental Não Formal; Monitorização; Participação Pública; Projeto Rios; Educação para a Cidadania
description: Eduser - Revista de Educação, v. 8 n. 1 (2016): Eduser - Revista de Educação
La représentation sociale de l'addiction au travail et l'expérience des personnes qui en souffrent
Creators: name: Bouvier, Jessica
Publisher: name: My University
Year: 2019

description: Au Canada, 31% des Canadien(ne)s âgé(e)s entre 19 et 64 ans s’auto-identifient en tant que personne avec une addiction au travail (Keown, 2007, p. 28). La présente recherche s’est attardée à mieux comprendre ce phénomène en explorant la représentation sociale de l’addiction au travail des personnes qui disent avoir souffert ou qui souffrent encore de l’addiction au travail. 5 participantes ont participé à une enquête par entretiens semi-dirigés. Plus particulièrement, cette recherche visait à 1) identifier et décrire les caractéristiques de l’addiction au travail selon l’expérience des individus qui en souffrent pour ainsi appréhender un sens commun et saisir la représentation sociale de ce phénomène; 2) contribuer à la définition scientifique du phénomène de l’addiction au travail et 3) présenter les pratiques sociales de résilience des individus avec une addiction au travail selon la représentation sociale de cette addiction. Selon nos résultats, la représentation sociale de l’addiction au travail est façonnée par l’expérience individuelle et l’organisation du travail. Cette addiction est représentée comme un phénomène en général positif en milieu de travail et problématique dans toutes les autres sphères de la vie. Notre étude a aussi identifié 6 pratiques de résilience des personnes avec une addiction au travail visant une vie équilibrée. Ces pratiques de résilience témoignent de la capacité d’empowerment de ces personnes. Mots clés : représentation sociale, addiction au travail, workaholism, addiction comportementale, définition, conditions organisationnelles, pratiques sociales de résilience, empowerment, bien-être.
Towards a picosecond transform-limited nitrogen-vacancy based single photon source
Creators: name: Su, Chun-Hsu
name: Greentree, Andrew D.
name: Hollenberg, Lloyd C. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze a nitrogen-vacancy (NV^-) colour centre based single photon source based on cavity Purcell enhancement of the zero phonon line and suppression of other transitions. Optimal performance conditions of the cavity-centre system are analyzed using Master equation and quantum trajectory methods. By coupling the centre strongly to a high-finesse optical cavity [Q ~ O(10^4-10^5), V ~ lambda^3] and using sub-picosecond optical excitation the system has striking performance, including effective lifetime of 70 ps, linewidth of 0.01 nm, near unit single photon emission probability and small [O(10^-5)] multi-photon probability.
description: 10 pages, 8 figures
On the chiral expansion of vector meson masses
Creators: name: Bavontaweepanya, Ruchipas
name: Guo, Xiao-Yu
name: Lutz, Matthias F. M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the chiral expansion of meson masses and decay constants using a chiral Lagrangian that was constructed previously based on the hadrogenesis conjecture. The one-loop self energies of the Goldstone bosons and vector mesons are evaluated. It is illustrated that a renormalizeable effective field theory arises once specific conditions on the low-energy constants are imposed. For the case where the hadrogenesis mass gap scale Lambda_{HG} is substantially larger than the chiral symmetry breaking scale Lambda_chi a partial summation scheme is required. All terms proportional to (M/Λ_χ)^n can be summed by a suitable renormalization, where M is the chiral and large-N_c limit of the vector meson masses in QCD. The size of loop effects from vector meson degrees of freedom is illustrated for physical quarks masses. Naturally sized effects are observed that have significant impact on the chiral structure of low-energy QCD with three light flavours.
description: 39 pages, 8 figures
Formação em Ciências na Licenciatura em Educação Básica: O Caso da Escola Superior de Educação de Bragança
Creators: name: Gonçalves, Adorinda
name: Rodrigues, Maria José
Publisher: name: Instituto Politécnico de Bragança
Year: 2017

description: A formação de educadores e professores é um processo que exige uma contínua reflexão dos diferentes atores envolvidos. No presente estudo pretende-se analisar o que pensam os alunos da formação em ciências e em didática das ciências obtida na Licenciatura em Educação Básica na Escola Superior de Educação de Bragança, e como essa formação contribui para seu o desempenho no âmbito da iniciação à prática profissional. Trata-se de um estudo qualitativo, de caráter descritivo e interpretativo que recorreu a entrevistas semiestruturadas. Os resultados evidenciaram que os alunos manifestaram satisfação relativamente à formação em ciências, e realçaram o papel da didática das ciências para o desenvolvimento das suas experiências nos diferentes contextos. Referiram, ainda, a relevância do trabalho prático e experimental e a implementação destas estratégias nas suas práticas educativas. Concluiu-se que embora a opinião dos alunos seja favorável à formação recebida reconhecem que há necessidade dessa formação ser ampliada. Palavras-chave: Formação de educadores e professores; educação básica; formação em ciências.
description: Eduser - Revista de Educação, v. 8 n. 1 (2016): Eduser - Revista de Educação
Analysis of a QBD process that depends on background QBD processes
Creators: name: Osogami, Takayuki
Publisher: name: Carnegie Mellon University
Year: 2000
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Abstract: "We define a class of Markov chains that are called recursive foreground-background quasi-birth-and-death (RFBQBD) processes, and describe approximate (nearly exact) analyses of an RF-BQBD process. An RFBQBD process consists of a foreground QBD process whose transitions depend on the level of a background QBD process, where the transitions of the background QBD process may depend on the level of another background QBD process, and this dependency may be repeated recursively. We also evaluate the running time and accuracy of the analyses numerically by applying them to analyze the performance of a particular task assignment policy in a multiserver system."
Ethics and Armed Conflict in Afghanistan
Creators: name: Sheerzuy, Wahid
Publisher: name: My University
Year: 2020

description: Afghanistan’s geopolitical importance to the West and the former USSR has had a tremendous effect on Afghanistan’s people. The country was used as a war zone both in the Cold War and post 9/11 between the United States, Russia, and other countries as well as groups like the Mujahedeen, Al-Qaeda, and Taliban militants. Looking at the country’s historical situation, it is clear that it has been a disaster place for the people of Afghanistan. Thus, they have become more vulnerable to such struggles due to the country’s long war. Conflicts are very common. On many occasions, they are the ultimate constructive drivers of societal change. As Afghanistan has been grappling with different forms of conflicts and civil wars for over four decades which resulted in the death of more than 2 million people and displacements of millions of people, it is important to look at the country’s ongoing conflicts from the ethical point of view (Maley 163). During forty years of conflict starting from 1978, various forms of inhuman and intolerable violence occurred; women have been assaulted, and children have been abused, forced to participate in violence, and are coerced to do labour jobs. Many credible national and international human rights observers have reported the continuous and prolonged killings and tortures of the war prisoners as well as breach of the Geneva accord, and human rights laws. It has also been reported that prisoners have been mass-massacred, and women and children have been group-rapped during the civil war in the 1990s (Maley 198).
Comunicação na escola com as Tecnologias de Informação e Comunicação
Creators: name: Mendes, Vanêssa
name: Osório, António
Publisher: name: Instituto Politécnico de Bragança
Year: 2017

description: A investigação visou essencialmente estudar com detalhe como se desenvolve a comunicação educacional num agrupamento de escolas, com especial atenção para a função que as Tecnologias de Informação e Comunicação (TIC) desempenham (ou podem desempenhar) no processo. Pretendeu-se caracterizar esse sistema, com recurso às TIC, identificando-se os elementos, os fluxos e os recursos utilizados. Neste estudo, procedeu-se não só à identificação de possíveis obstáculos que ocorrem no desenvolvimento da comunicação educacional, com recurso às tecnologias, com a indicação de possíveis melhorias, como se propõem formas que podem facilitar o processo de comunicação entre os elementos que constituem a comunidade escolar. Destacam-se neste artigo, uma das vertentes do estudo: a identificação das ocorrências de comunicação já existentes no agrupamento, como a comunicação com o correio eletrónico, comunicação com a plataforma Moodle e comunicação com as redes sociais (Facebook). Palavras-chave: Comunicação educacional; Tecnologias de Informação e Comunicação.
description: Eduser - Revista de Educação, v. 8 n. 1 (2016): Eduser - Revista de Educação
Pre-examinations Improve Automated Metastases Detection on Cranial MRI
Creators: name: Deike-Hofmann, Katerina
name: Dancs, Dorottya
name: Paech, Daniel
name: Schlemmer, Heinz-Peter
name: Maier-Hein, Klaus
name: Bäumer, Philipp
name: Radbruch, Alexander
name: Götz, Michael
Publisher: name: arXiv
Year: 2024
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Medical Physics (physics.med-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Materials and methods: First, a dual-time approach was assessed, for which the CNN was provided sequences of the MRI that initially depicted new MM (diagnosis MRI) as well as of a prediagnosis MRI: inclusion of only contrast-enhanced T1-weighted images (CNNdual_ce) was compared with inclusion of also the native T1-weighted images, T2-weighted images, and FLAIR sequences of both time points (CNNdual_all).Second, results were compared with the corresponding single time approaches, in which the CNN was provided exclusively the respective sequences of the diagnosis MRI.Casewise diagnostic performance parameters were calculated from 5-fold cross-validation.
 Results: In total, 94 cases with 494 MMs were included. Overall, the highest diagnostic performance was achieved by inclusion of only the contrast-enhanced T1-weighted images of the diagnosis and of a prediagnosis MRI (CNNdual_ce, sensitivity = 73%, PPV = 25%, F1-score = 36%). Using exclusively contrast-enhanced T1-weighted images as input resulted in significantly less false-positives (FPs) compared with inclusion of further sequences beyond contrast-enhanced T1-weighted images (FPs = 5/7 for CNNdual_ce/CNNdual_all, P < 1e-5). Comparison of contrast-enhanced dual and mono time approaches revealed that exclusion of prediagnosis MRI significantly increased FPs (FPs = 5/10 for CNNdual_ce/CNNce, P < 1e-9).Approaches with only native sequences were clearly inferior to CNNs that were provided contrast-enhanced sequences.
 Conclusions: Automated MM detection on contrast-enhanced T1-weighted images performed with high sensitivity. Frequent FPs due to artifacts and vessels were significantly reduced by additional inclusion of prediagnosis MRI, but not by inclusion of further sequences beyond contrast-enhanced T1-weighted images. Future studies might investigate different change detection architectures for computer-aided detection.
A canção de embalar na diminuição do choro de crianças pequenas
Creators: name: Castro, Isabel De
Publisher: name: Instituto Politécnico de Bragança
Year: 2017

description: Este artigo apresenta o desenho de uma investigação realizada em contexto natural tendo como objetivo principal perceber se, através da audição de canções de embalar e durante o período de sono de crianças pequenas, se registam alterações dos episódios de choro. Para tal foi realizado um estudo exploratório, contextualizado, seguindo um plano ABAB, em que a variável independente (a canção de embalar) era introduzida nos esquemas B (B1-B2). A investigação foi realizada num infantário, com 3 bebés de idades compreendidas entre os 4,5 e os 6 meses. De uma forma geral foi observado uma tendência geral para a redução e desaparecimento do estado de choro, nos esquemas com audição da canção. Neste contexto, pretende-se mostrar que a canção de embalar, enquanto género musical de índole popular e que apresenta uma forma dolente, pode utilizar-se enquanto ferramenta capaz de criar um espaço de tranquilidade para as crianças pequenas, podendo ser aplicada em distintos ambientes e práticas da vida do bebé
description: Eduser - Revista de Educação, v. 8 n. 1 (2016): Eduser - Revista de Educação