cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Der Deutsche Ökumenische Studienausschuß (DÖSTA) - ein Rückblick
Creators: name: Kertelge, Karl
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 43 Nr. 1 (1994): Ökumenische Rundschau, Band 43, Heft 1
Antonio Gálvez Ronceros - La creazione del mondo
Creators: name: Pecoraro, Lucrezia
Publisher: name: La rivista di CRIAR
Year: 2019
Subjects: letteratura; traduzione

description: Antonio Leoncio Gálvez Ronceros (Chincha Alta, 1932), docente universitario e narraratore peruviano, ha pubblicato diversi libri di racconti, mai tradotti in Italia. Questo testo fa parte di Monólogos desde las tinieblas(Monologhi dalle tenebre), raccolta di quadri di costume ispirata all’infanzia dell’autore, in uno scenario agricolo dominato dal latifondo e popolato da miseri contadini afrodiscendenti.
description: La rivista di CRIAR, N. 4 (2019)
José “Cheche” Campos Dávila - Vita da cani
Creators: name: Buzzi, Francesca
Publisher: name: La rivista di CRIAR
Year: 2019
Subjects: letteratura; traduzione

description: José “Cheche” Campos Dávila (Lima, 1949) insegna all’Universidad Nacional de Educación Enrique Guzmán y Valle ed è un attivista per i diritti degli afrodiscendenti in Perù. È autore di numerosi saggi e articoli e ha pubblicato diverse raccolte di racconti, tra cui Las negras noches del dolor y para educar a hombrecitos(2004), da cui è tratto Vita da Cani. In Vita da Cani(Perra Vida) l’autore ci conduce agli anni del liceo – nella Lima di fine anni ’60 - raccontandoci aneddoti di vita adolescenziale in cui luoghi e personaggi si fanno espressione dell’eterogeneità culturale essenza della società peruviana di allora e di oggi.
description: La rivista di CRIAR, N. 4 (2019)
Cronwell Jara Jiménez - Pelaindios
Creators: name: Torricella, Francesca
Publisher: name: La rivista di CRIAR
Year: 2019
Subjects: traduzione; letteratura

description: Cronwell Jorge Jara Jiménez (Piura 1949) è un narratore e poeta peruviano. Il racconto in questione, che appartiene alla raccolta Babá Osaím, Babá Osaím, cimarrón, Lima, ed. San Marcos, 2003, fa riferimento al conflitto armato interno vissuto in Perù tra il 1980 e il 2000.
description: La rivista di CRIAR, N. 4 (2019)
Lenin Solano Ambía - Lacrime di bambino
Creators: name: Silvia Ricci, Silvia Arnaboldi Olga Janowska
Publisher: name: La rivista di CRIAR
Year: 2019
Subjects: letteratura; traduzione

description: Lenin Solano Ambía, nato nel 1983 a Lima (Perù) e residente a Parigi, è l’autore di Lágrimas de niño, una serie di racconti dedicati a minori dall’infanzia difficile. Nel racconto che dà il titolo alla raccolta, protagonista è un ragazzino di origine giapponese emigrato con la sua famiglia a Lima negli anni 90 del secolo scorso. La sua vita cambia completamente il giorno in cui viene eletto il nuovo presidente del Perù Alberto Fujimori, politico di origine giapponese, la notte dell’8 agosto 1990.
description: La rivista di CRIAR, N. 4 (2019)
The impact on the general properties of HII galaxies in the local universe of the visibility of the [OIII]l 4363 line
Creators: name: Hoyos, Carlos
name: Diaz, Angeles I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a statistical study of a very large sample of HII galaxies taken from the literature. We focus on the differences in several properties between galaxies that show the auroral line [OIII]l4363 and those that do not present this feature in their spectra. It turns out that objects without this auroral line are more luminous, more metal-rich and present a lower ionization degree. The underlying population is found to be much more important for objects without the [OIII]l 4363 line, and the effective temperature of the ionizing star clusters of galaxies not showing the auroral line is probably lower. We also study the subsample of HII galaxies whose properties most closely resemble the properties of the intermediate-redshift population of Luminous Compact Blue Galaxies (LCBGs). The objects from this subsample are more similar to the objects not showing the [OIII]l 4363 line. It might therefore be expected that the intermediate-redshift population of LCBGs is powered by very massive, yet somewhat aged star clusters. The oxygen abundance of LCBGs would be greater than the average oxygen abundance of local HII galaxies.
description: 17 pages, 28 figures and 5 tables. To be published in MNRAS
Washington Cucurto - L’Homme au Casque Bleu
Creators: name: Be, Alice
Publisher: name: La rivista di CRIAR
Year: 2019
Subjects: letteratura; traduzione

description: Washington Cucurto, hétéronyme de l’auteur argentin Santiago Vega, né en 1973 à Quilmes, ville industrielle de la province de Buenos Aires, fonde en 2003 « Eloisa Cartonera », la première maison d’édition cartonerad’Amérique Latine. Dans le conte intitulé L’Homme au Casque Vert(de titre original: El Hombre del Casco Azul), le personnage principal, Vega, raconte une journée type de sa vie de magasinier précaire, qui, en selle sur son vélo, parcourt les rues de la ville de Buenos Aires, allant d’un supermarché Coto à l’autre afin d’y installer en un temps record, les marchandises sur leurs gondoles. Vega invite ses lecteurs à se coller, comme s’ils étaient des autocollants, sur le casque Bleu de son uniforme de travail, afin de pouvoir le suivre à travers les folles aventures de son quotidien dans le Buenos Aires contemporain.
description: La rivista di CRIAR, N. 4 (2019)
Lima Barreto - L’uomo che sapeva il giavanese
Creators: name: Francesca Debernardis, Sofia Castagneto,
Publisher: name: La rivista di CRIAR
Year: 2019
Subjects: traduzione; letteratura

description: Afonso Henriques de Lima Barreto (1881-1922) nacque a Rio de Janeiro da genitori di origine schiava. Nella sua breve e tormentata vita, afflitto da problemi economici e da crisi di alcolismo, si dedicò al giornalismo e alla narrativa, privilegiando le tematiche sociali ed esercitando la satira politica. Venne severamente criticato dai critici del tempo per lo stile colloquiale e a dir loro sciatto. Questo racconto venne inizialmente pubblicato nel 1911 sullaGazeta da Tarde di Rio de Janeiro e poi incluso in una raccolta intitolata O homem que sabia javanês e outros contos.
description: La rivista di CRIAR, N. 4 (2019)
Samuel Archibald - Antigonish
Creators: name: Morena, Roberta
Publisher: name: La rivista di CRIAR
Year: 2019
Subjects: traduzione; letteratura

description: Samuel Archibald, professore universitario e scrittore del Québec, è nato nel 1978 ad Arvida, città del Saguenay‒Lac-Saint-Jean costruita all’inizio del ‘900 per soddisfare i bisogni della compagnia Alcoa che vi ha installato un’importante fabbrica per la produzione d’alluminio. Antigonishè uno dei quattordici racconti ambientati nella sua città natale, che hanno riscosso un grande successo sia in Canada che in Francia.Storie di notti passate nella foresta e di mattine difficili. Storie di ragazze innocenti e di bestie selvagge, di mancati omicidi e di mutilazioni rituali, di gite verso il nulla e di case infestate dai fantasmi. Storie ora tristi, ora divertenti od orribili, sospese tra la verità e la finzione.
description: La rivista di CRIAR, N. 4 (2019)
The Role of Exopolymers in Protection of Ralstonia sp., a Cadmium-resistant Bacterium, from Cadmium Toxicity
Creators: name: Anchulee Watcharamusika
name: Benjaphorn Prapagdeea
name: Patana Thavipokeb
name: Boontanon, Narin
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2008
Subjects: cadmium-resistance mechanism,exopolymers,Ralstonia sp.

description: 2, 1, EnvironmentAsia
The breakBRD Breakdown: Using IllustrisTNG to Track the Quenching of an Observationally-Motivated Sample of Centrally Star-Forming Galaxies
Creators: name: Kopenhafer, Claire
name: Starkenburg, Tjitske K.
name: Tonnesen, Stephanie
name: Tuttle, Sarah
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The observed breakBRD ("break bulges in red disks") galaxies are a nearby sample of face-on disk galaxies with particularly centrally concentrated star formation: they have red disks but recent star formation in their centers as measured by the D$_n$4000 spectral index (Tuttle & Tonnesen 2020). In this paper, we search for breakBRD analogues in the IllustrisTNG simulation and describe their history and future. We find that a small fraction (${\sim}4\%$ at $z=0$; ${\sim}1\%$ at $z=0.5$) of galaxies fulfill the breakBRD criteria, in agreement with observations. In comparison with the mass-weighted parent IllustrisTNG sample, these galaxies tend to consist of a higher fraction of satellite and splashback galaxies. However, the central, non-splashback breakBRD galaxies show similar environments, black hole masses, and merger rates, indicating that there is not a single formation trigger for inner star formation and outer quenching. We determine that breakBRD analogue galaxies as a whole are in the process of quenching. The breakBRD state - with its highly centrally concentrated star formation - is uncommon in the history of either currently quiescent or star-forming galaxies; however, approximately 10% of $10^{10} < M_\ast/M_{\odot} < 10^{11}$ quiescent galaxies at $z=0$ have experienced SFR concentrations comparable to those of the breakBRDs in their past. Additionally, the breakBRD state is short-lived, lasting a few hundred Myr up to ${\sim}2$ Gyr. The observed breakBRD galaxies may therefore be a unique sample of outside-in quenching galaxies.
description: Accepted to ApJ
Samuel Archibald - Ogni casa doppia e duplice
Creators: name: Morena, Roberta
Publisher: name: La rivista di CRIAR
Year: 2019
Subjects: letteratura; traduzione

description: Samuel Archibald, professore universitario e scrittore del Québec, è nato nel 1978 ad Arvida, città del Saguenay‒Lac-Saint-Jean costruita all’inizio del ‘900 per soddisfare i bisogni della compagnia Alcoa che vi ha installato un’importante fabbrica per la produzione d’alluminio. Ogni casa è doppia e dupliceè uno dei quattordici racconti ambientati nella sua città natale, che hanno riscosso un grande successo sia in Canada che in Francia.Storie di notti passate nella foresta e di mattine difficili. Storie di ragazze innocenti e di bestie selvagge, di mancati omicidi e di mutilazioni rituali, di gite verso il nulla e di case infestate dai fantasmi. Storie ora tristi, ora divertenti od orribili, sospese tra la verità e la finzione.
description: La rivista di CRIAR, N. 4 (2019)
Xia Jia - Ciò di cui hai bisogno è solamente amore
Creators: name: Martinelli, Greta
Publisher: name: La rivista di CRIAR
Year: 2019
Subjects: letteratura; traduzione

description: Xia Jia (夏茄), nome vero Wang Yao (王瑶), è una giovane autrice di fantascienza cinese, nata nel 1984 nello Xi’An da due genitori ingegneri. Dopo aver ottenuto un master in letteratura comparata nel dipartimento di letteratura cinese della Beijing Daxue 北京大学(Università di Pechino), l’autrice decide di dedicarsi a tempo pieno alla scrittura, vincendo numerosi premi letterari per i suoi racconti di fantascienza contemporanea, che uniscono elementi della tradizione letteraria cinese a elementi provenienti dalla pop culture occidentale.
description: La rivista di CRIAR, N. 4 (2019)
Optimized Observable Readout from Single-shot Images of Ultracold Atoms via Machine Learning
Creators: name: Lode, Axel U. J.
name: Lin, Rui
name: Büttner, Miriam
name: Papariello, Luca
name: Lévêque, Camille
name: Chitra, R.
name: Tsatsos, Marios C.
name: Jaksch, Dieter
name: Molignini, Paolo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Single-shot images are the standard readout of experiments with ultracold atoms -- the tarnished looking glass into their many-body physics. The efficient extraction of observables from single-shot images is thus crucial. Here, we demonstrate how artificial neural networks can optimize this extraction. In contrast to standard averaging approaches, machine learning allows both one- and two-particle densities to be accurately obtained from a drastically reduced number of single-shot images. Quantum fluctuations and correlations are directly harnessed to obtain physical observables for bosons in a tilted double-well potential at an unprecedented accuracy. Strikingly, machine learning also enables a reliable extraction of momentum-space observables from real-space single-shot images and vice versa. This obviates the need for a reconfiguration of the experimental setup between in-situ and time-of-flight imaging, thus potentially granting an outstanding reduction in resources.
description: 7+8 pages, 3+8 figures, software available at http://ultracold.org
Learning to read at daycare : an analysis of the preschool library
Creators: name: McCallum, Sandra Marie
Publisher: name: University of British Columbia
Year: 2009

description: The Preschool Library program (Wastie, 1996) was evaluated over 7 weeks for its effect on preliteracy skills of 16 3-, 4-, and 5-year olds in one daycare setting. A control group consisted of 10 4-, and 5-year olds in another daycare. Parent interviews and daycare observations provided measures of initial literacy environment. The preliteracy skills that were measured included definition production, book handling skills , environmental print awarenes and comments during storytime. Although some improvement occurred in bookskills, definitions, and storytime comments, reliable differences were not found between control and experimental groups on individual tasks. Trends across tasks however were consistently in favour of the experimental group. Possible explanations are provided as to why results did not strongly support efficacy of the program. The most likely explanation is that a control group was not adequately provided due to differences in initial literacy environments. Both groups progressed during the course of the study, likely due to support from different sources; the experimental group received support from the Preschool Library program, and the control group received support from a strong literacy environment already in place.
title: Dagstuhl Reports, Table of Contents, Volume 5, Issue 12, 2015
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2016
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 5
subject: Issue 12
subject: 2015

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 5, Issue 12, pages i-ii
José María Arguedas - Al nostro padre creatore Túpac Amaru
Creators: name: Corso Di Culture Ispanofone, Traduzione Collettiva
Publisher: name: La rivista di CRIAR
Year: 2019
Subjects: traduzione; letteratura

description: José María Arguedas (Andahuaylas 1911 – Lima 1969) è stato un narratore, poeta, saggista e antropologo peruviano. Pur originario di una famiglia della classe media criolla, la particolare circostanza di essere cresciuto a contatto con la tradizione culturale andina imparando la lingua quechua, gli consentì di capire e descrivere con spiccata sensibilità la complessa realtà degli indios nella società peruviana del suo tempo. Questo inno, originalmente scritto in quechua e poi tradotto in spagnolo dal suo autore, è dedicato all'ultimo sovrano dell'effimero regno di Vilcabamba, creato dal padre Manco II nel tentativo di restaurare l'Impero inca dopo la conquista spagnola e la perdita della capitale Cusco. Catturato e giustiziato per ordine del vicerè spagnolo, il corpo di Tupac Amaru divenne oggetto di grande devozione da parte del suo indomito popolo.
description: La rivista di CRIAR, N. 4 (2019)
title: Dagstuhl Reports, Table of Contents, Volume 6, Issue 1, 2016
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2016
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 6
subject: Issue 1
subject: 2016

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 6, Issue 1, pages i-ii
Physical insights from the spectrum of the radio halo in MACS J0717.5+3745
Creators: name: Rajpurohit, K.
name: Brunetti, G.
name: Bonafede, A.
name: van Weeren, R. J.
name: Botteon, A.
name: Vazza, F.
name: Hoeft, M.
name: Riseley, C. J.
name: Bonnassieux, E.
name: Brienza, M.
name: Forman, W. R.
name: Röttgering, H. J. A.
name: Rajpurohit, A. S.
name: Locatelli, N.
name: Shimwell, T. W.
name: Cassano, R.
name: Di Gennaro, G.
name: Brüggen, M.
name: Wittor, D.
name: Drabent, A.
name: Ignesti, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present new LOFAR observations of the massive merging galaxy cluster MACS J0717.5+3745. The cluster hosts the most powerful radio halo known to date. These new observations, in combination with published uGMRT (300$-$850 MHz) and VLA (1$-$6.5 GHz) data, reveal that the halo is more extended than previously thought, with a largest linear size of $\sim2.2 \rm Mpc$. The halo shows a steep spectrum ($α_{144\,\text{MHz}}^{1.5\,\text{GHz}}\sim-1.4$) and a steepening ($α_{1.5 \text{GHz}}^{5.5 \text{GHz}}\sim-1.9$) above 1.5 GHz. We find a strong scattering in spectral index maps on scales of 50$-$100 kpc. We suggest that such a strong scattering may be a consequence of the regime where inverse Compton dominate the energy losses of electrons. The spectral index becomes steeper and shows an increased curvature in the outermost regions of the halo. We combined the radio data with \textit{Chandra} observations to investigate the connection between the thermal and non-thermal components of the intracluster medium (ICM). Despite a significant substructure in the halo emission, the radio brightness correlates strongly with the X-ray brightness at all observed frequencies. The radio-versus-X-ray brightness correlation slope steepens at a higher radio frequency (from $b_{144 \text{MHz}}=0.67\pm0.05$ to $b_{3.0 \text{GHz}}=0.98\pm0.09$) and the spectral index shows a significant anti correlation with the X-ray brightness. Both pieces of evidence further support a spectral steepening in the external regions. The compelling evidence for a steep spectral index, the existence of a spectral break above 1.5 GHz, and the dependence of radio and X-ray surface brightness correlation on frequency are interpreted in the context of turbulent reacceleration models. Under this scenario, our results allowed us to constrain that the turbulent kinetic pressure of the ICM is up to 10%.
description: 16 pages, 12 figures, accepted for publication in A&A
Effects of Handling Processes on the Quality and Biochemical Changes in Tissue of Mud Crab, ( Scylla serrata, Forsskal, 1755) During Emersion Storage
Creators: name: Waritchon Ninlanona
name: Nongnud Tangkrock-Olan
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2008
Subjects: biochemistry,freshness,emersion storage,handling process,lactate,glycogen,mud crab,Scylla serrata

description: 2, 1, EnvironmentAsia
TokenWeaver: Privacy Preserving and Post-Compromise Secure Attestation
Creators: name: Cremers, Cas
name: Horowitz, Gal
name: Jacomme, Charlie
name: Ronen, Eyal
Publisher: name: CISPA
Year: 2024

description: Modern attestation based on Trusted Execution Environments (TEEs) can significantly reduce the risk of
secret compromise, allowing users to securely perform sensitive computations such as running cryptographic protocols for authentication across security critical services. However, this has made TEEs a high-value target, driving an arms race between novel compromise attacks and continuous TEEs updates.

Ideally, we want to achieve Post-Compromise Security
(PCS): even after a TEE compromise, we can update it back
into a secure state. However, at the same time, we would like to guarantee the privacy of users, in particular preventing providers (such as Intel, Google, or Samsung) or services from tracking users across services. This requires unlinkability, which seems incompatible with standard PCS healing mechanisms.

In this work, we develop TokenWeaver, the ﬁrst privacy-
preserving post-compromise secure attestation method with automated formal proofs for its core properties. Our construction weaves together two types of token chains, one of which is linkable and the other is unlinkable. We provide the formal models based on the Tamarin and DeepSec provers, including protocol, security properties, and proofs for reproducibility, as well as a proof-of-concept implementation in python that shows the simplicity and applicability of our solution.
Strong-coupling dynamics of a multi-cellular chemotactic system
Creators: name: Grima, Ramon
Publisher: name: arXiv
Year: 2005
Subjects: subject: Cell Behavior (q-bio.CB)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Chemical signaling is one of the ubiquitous mechanisms by which inter-cellular communication takes place at the microscopic level, particularly via chemotaxis. Such multi-cellular systems are popularly studied using continuum, mean-field equations. In this letter we study a stochastic model of chemotactic signaling. The Langevin formalism of the model makes it amenable to calculation via non-perturbative analysis, which enables a quantification of the effect of fluctuations on both the weak and strongly-coupled biological dynamics. In particular we show that the (i) self-localization due to auto-chemotaxis is impossible. (ii) when aggregation occurs, the aggregate performs a random walk with a renormalized diffusion coefficient $D_R \propto ε^{-2} N^{-3}$. (iii) the stochastic model exhibits sharp transitions in cell motile behavior for negative chemotaxis, behavior which has no parallel in the mean-field Keller-Segel equations.
description: 4 pages, 2 figures
Simultaneous modelling of matter power spectrum and bispectrum in the presence of baryons
Creators: name: Aricò, Giovanni
name: Angulo, Raul E.
name: Hernández-Monteagudo, Carlos
name: Contreras, Sergio
name: Zennaro, Matteo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We demonstrate that baryonification algorithms, which displace particles in gravity-only simulations according to physically-motivated prescriptions, can simultaneously capture the impact of baryonic physics on the 2 and 3-point statistics of matter. Specifically, we show that our implementation of a baryonification algorithm jointly fits the changes induced by baryons on the power spectrum and equilateral bispectrum on scales up to k < 5 h/Mpc and redshifts z<2, as measured in six different cosmological hydrodynamical simulations. The accuracy of our fits are typically 1% for the power spectrum, and for the equilateral and squeezed bispectra, which somewhat degrades to 3% for simulations with extreme feedback prescriptions. Our results support the physical assumptions underlying baryonification approaches, and encourage their use in interpreting weak gravitational lensing and other cosmological observables.
description: 14 pages, 15 figures. To be submitted to MNRAS. Comments are welcome
Ambient Air Quality Assessment in Nigeria: Challenges and Remedies
Creators: name: Abulude, Francis Olawale
name: Fagbayide, Samuel Dare
name: Akinyinka Akinnusotu
name: Adebola Elemide
Publisher: name: Zenodo
Year: 2019

description: Worldwide air quality is a problem continuously attended to due to the health risk. Africa is not out of this, most especially Nigeria. According to a report, Nigeria is tagged as having most polluted cities in the world. Although efforts are being put into place to reduce the pollution problems, much could not be attained due to some challenges in the assessment. Thus, the aim of the paper was to identify some bottlenecks which hinder air quality assessments in Nigeria and to suggest the way forward. To this end, the problems were highlighted in the paper and the solutions were provided.
A Comparison of Optical and Near-Infrared Colours of Magellanic Cloud Star Clusters with Predictions of Simple Stellar Population Models
Creators: name: Pessev, P. M.
name: Goudfrooij, P.
name: Puzia, T. H.
name: Chandar, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present integrated JHK_s 2MASS photometry and a compilation of integrated-light optical photoelectric measurements for 84 star clusters in the Magellanic Clouds. These clusters range in age from ~200 Myr to >10 Gyr, and have [Fe/H] values from -2.2 to -0.1 dex. We find a spread in the intrinsic colours of clusters with similar ages and metallicities, at least some of which is due to stochastic fluctuations in the number of bright stars residing in low-mass clusters. We use 54 clusters with the most reliable age and metallicity estimates as test particles to evaluate the performance of four widely used SSP models in the optical/NIR colour-colour space. All models reproduce the reddening-corrected colours of the old (>10 Gyr) globular clusters quite well, but model performance varies at younger ages. In order to account for the effects of stochastic fluctuations in individual clusters, we provide composite B-V, B-J, V-J, V-Ks and J-Ks colours for Magellanic Cloud clusters in several different age intervals. The accumulated mass for most composite clusters are higher than that needed to keep luminosity variations due to stochastic fluctuations below the 10% level. The colours of the composite clusters are clearly distinct in optical-NIR colour-colour space for the following intervals of age: >10 Gyr, 2-9 Gyr, 1-2 Gyr, and 200 Myr-1 Gyr. This suggests that a combination of optical plus NIR colours can be used to differentiate clusters of different age and metallicity.
description: 30 pages, 21 figures, 10 tables, accepted for publication at MNRAS, a full-resolution version of the manuscript is available at http://www.astrosci.ca/users/puziat/HIA/Home_files/ms.pdf
The Higgs sector of gravitational gauge theories
Creators: name: Leclerc, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Gravitational gauge theories with de Sitter, Poincare and affine symmetry group are investigated under the aspect of the breakdown of the initial symmetry group down to the Lorentz subgroup. We review the theory of spontaneously broken de Sitter gravity by Stelle and West and apply a similar approach to the case of the Poincare and affine groups. Especially, we find that the groundstate of the metric affine theory leads to the determination of the Lorentzian signature of the metric in the groundstate. We show that the Higgs field remains in its groundstate, i.e., that the metric will have Lorentzian signature, unless we introduce matter fields that explicitely couple to the symmetric part of the connection. We also show that some features, like the necessity of the introduction of a dilaton field, that seem artificial in the context of the affine theory, appear most natural if the gauge group is taken to be the special linear group in five dimensions. Finally, we present an alternative model which is based on the spinor representation of the Lorentz group and is especially adopted to the description of spinor fields in a general linear covariant way, without the use of the infinite dimensional representations which are usually considered to be unavoidable.
description: 50 pages, version to appear in Annals Phys
The dependence on environment of Cold Dark Matter Halo properties
Creators: name: Avila-Reese, V.
name: Colin, P.
name: Gottloeber, S.
name: Firmani, C.
name: Maulbetsch, C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: High-resolution LCDM cosmological N-body simulations are used to study the properties of galaxy-size dark halos in different environments (cluster, void, and "field"). Halos in clusters and their surroundings have a median spin parameter ~1.3 times lower, and tend to be more spherical and to have less aligned internal angular momentum than halos in voids and the field. For halos in clusters the concentration parameters decrease on average with mass with a slope of ~0.1; for halos in voids these concentrations do not change with mass. For masses <5 10^11 M_sh^-1, halos in clusters are on average ~30-40% more concentrated and have ~2 times higher central densities than halos in voids. When comparing only parent halos, the differences are less pronounced but they are still significant. The Vmax-and Vrms-mass relations are shallower and more scattered for halos in clusters than in voids, and for a given Vmax or Vrms, the mass is smaller at z=1 than at z=0 in all the environments. At z=1, the differences in the halo properties with environment almost dissapear, suggesting this that the differences were stablished mainly after z~1. The halos in clusters undergo more dramatic changes than those in the field or the voids. The differences with environment are owing to (i) the dependence of halo formation time on environment, and (ii) local effects as tidal stripping and the tumultuos histories that halos suffer in high-density regions. We calculate seminumerical models of disk galaxy evolution in halos with the properties found for the different environments. For a given disk mass, the galaxy disks have higher surface density, larger Vd,max and secular bulge-to-disk ratio, lower gas fraction, and are redder as one goes from cluster to void environments, in rough agreement with observations. (abridged)
description: 28 pages, 13 figures included. To appear in The Astrophysical Journal
A NICER View of a Highly-Absorbed Flare in GRS 1915+105
Creators: name: Neilsen, J.
name: Homan, J.
name: Steiner, J. F.
name: Marcel, G.
name: Cackett, E.
name: Remillard, R. A.
name: Gendreau, K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: After 26 years in outburst, the black hole X-ray binary GRS 1915+105 dimmed considerably in early 2018; its flux dropped sharply in mid-2019, and it has remained faint ever since. This faint period, the "obscured state," is punctuated by occasional X-ray flares, many of which have been observed by NICER as part of our regular monitoring program. Here we present detailed time-resolved spectroscopy of one bright flare, whose spectrum shows evidence of high column density partial covering absorption and extremely deep absorption lines (equivalent widths over 100 eV in some cases). We study the time-dependent ionization of the obscuring gas with XSTAR, ultimately attributing the absorption to a radially-stratified absorber of density 1e12-1e13 cm^-3 at a ~few x 1e11 cm from the black hole. We argue that a vertically-extended outer disk could explain this obscuration. We discuss several scenarios to explain the obscured state, including massive outflows, an increase in the mass accretion rate, and changes in the outer disk that herald the approach of quiescence, but none are entirely satisfactory. Alternative explanations, such as obscuration by the accretion stream impact point, may be testable with current or future data.
description: 16 pages, 5 figures. Published in ApJ: https://iopscience.iop.org/article/10.3847/1538-4357/abb598
N=2 Superparticles, RR Fields and Noncommutative Structures of (super)-Spacetime
Creators: name: Grassi, P. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The recent developments in superstring theory prompted the study of non-commutative structures in superspace. Considering bosonic and fermionic strings in a constant antisymmetric tensor background yields a non-vanishing commutator between the bosonic coordinates of the spacetime. Likewise, the presence of constant Ramond-Ramond (RR) background leads to a non-vanishing anti-commutator for the Grassmann coordinates of the superspace. The non-vanishing commutation relation between bosonic coordinates can also be derived using a particle moving in a magnetic background, we use N=2 pure spinor superparticles and D0-branes to show how the non-commutative structures emerge in superspace. It is argued how a D0-brane in a background of RR fields reproduces the results obtained in string theory.
description: Based on a lectures given at 43rd International School of Subnuclear Physics, Erice, Sicily, Italy, Aug. 2005
title: Dagstuhl Reports, Table of Contents, Volume 6, Issue 2, 2016
Creators: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2016
Subjects: subject: Dagstuhl Reports
subject: Table of Contents
subject: Volume 6
subject: Issue 2
subject: 2016

description: Table of Contents, Frontmatter
description: Dagstuhl Reports, Volume 6, Issue 2, pages i-ii
Spectral and Imaging properties of Sgr A* from High-Resolution 3D GRMHD Simulations with Radiative Cooling
Creators: name: Yoon, Doosoo
name: Chatterjee, Koushik
name: Markoff, Sera
name: van Eijnatten, David
name: Younsi, Ziri
name: Liska, Matthew
name: Tchekhovskoy, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The candidate supermassive black hole in the Galactic Centre, Sagittarius A* (Sgr A*), is known to be fed by a radiatively inefficient accretion flow (RIAF), inferred by its low accretion rate. Consequently, radiative cooling has in general been overlooked in the study of Sgr A*. However, the radiative properties of the plasma in RIAFs are poorly understood. In this work, using full 3D general-relativistic magneto-hydrodynamical simulations, we study the impact of radiative cooling on the dynamical evolution of the accreting plasma, presenting spectral energy distributions and synthetic sub-millimeter images generated from the accretion flow around Sgr A*. These simulations solve the approximated equations for radiative cooling processes self-consistently, including synchrotron, bremsstrahlung, and inverse Compton processes. We find that radiative cooling plays an increasingly important role in the dynamics of the accretion flow as the accretion rate increases: the mid-plane density grows and the infalling gas is less turbulent as cooling becomes stronger. The changes in the dynamical evolution become important when the accretion rate is larger than $10^{-8}\,M_{\odot}~{\rm yr}^{-1}$ ($\gtrsim 10^{-7} \dot{M}_{\rm Edd}$, where $\dot{M}_{\rm Edd}$ is the Eddington accretion rate). The resulting spectra in the cooled models also differ from those in the non-cooled models: the overall flux, including the peak values at the sub-mm and the far-UV, is slightly lower as a consequence of a decrease in the electron temperature. Our results suggest that radiative cooling should be carefully taken into account in modelling Sgr A* and other low-luminosity active galactic nuclei that have a mass accretion rate of $\dot{M} > 10^{-7}\,\dot{M}_{\rm Edd}$.
description: 16 pages, 16 figures, accepted for publication in MNRAS
Markov models of coarsening in two-dimensional foams with edge rupture
Creators: name: Klobusicky, Joseph
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We construct Markov processes for modeling the rupture of edges in a two-dimensional foam. We first describe a network model for tracking topological information of foam networks with a state space of combinatorial embeddings. Through a mean-field rule for randomly selecting neighboring cells of a rupturing edge, we consider a simplified version of the network model in the sequence space $\ell_1(\mathbb N)$ which counts total numbers of cells with $n\ge 3$ sides ($n$-gons). Under a large cell limit, we show that number densities of $n$-gons in the mean field model are solutions of an infinite system of nonlinear kinetic equations. This system is comparable to the Smoluchowski coagulation equation for coalescing particles under a multiplicative collision kernel, suggesting gelation behavior. Numerical simulations reveal gelation in the mean-field model, and also comparable statistical behavior between the network and mean-field models.
description: 36 pages, multiple figures
Brueckner-Hartree-Fock study of circular quantum dots
Creators: name: Emperador, A.
name: Lipparini, E.
name: Serra, Ll.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We calculate ground state energies in the Brueckner-Hartree-Fock theory for $N$ electrons (with $N\le 20$) confined to a circular quantum dot and in presence of a static magnetic field. Comparison with the predictions of Hartree-Fock, local-spin-density and exact configuration-interaction theories is made. We find that the correlations taken into account in Brueckner-Hartree-Fock calculations give an important contribution to the ground state energies, specially in strongly confined dots. In this high-density range, corresponding in practice to self-assembled quantum dots, the results of Brueckner-Hartree-Fock calculations are close to the exact values and better than those obtained in the local-spin-density approximation.
description: Regular article
Planet formation and disk mass dependence in a pebble-driven scenario for low mass stars
Creators: name: Dash, Spandan
name: Miguel, Yamila
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Measured disk masses seem to be too low to form the observed population of planetary systems. In this context, we develop a population synthesis code in the pebble accretion scenario, to analyse the disk mass dependence on planet formation around low mass stars. We base our model on the analytical sequential model presented in Ormel et al. 2017 and analyse the populations resulting from varying initial disk mass distributions. Starting out with seeds the mass of Ceres near the ice-line formed by streaming instability, we grow the planets using the Pebble Accretion process and migrate them inwards using Type-I migration. The next planets are formed sequentially after the previous planet crosses the ice-line. We explore different initial distributions of disk masses to show the dependence of this parameter with the final planetary population. Our results show that compact close-in resonant systems can be pretty common around M-dwarfs between $0.09-0.2$ $M_{\odot}$ only when the disks considered are more massive than what is being observed by sub-mm disk surveys. The minimum disk mass to form a Mars-like planet is found to be about $2 \times 10^{-3}$ $M_{\odot}$. Small variation in the disk mass distribution also manifest in the simulated planet distribution. The paradox of disk masses might be caused by an underestimation of the disk masses in observations, by a rapid depletion of mass in disks by planets growing within a million years or by deficiencies in our current planet formation picture.
description: Accepted for publication in Monthly Notices of the Royal Astronomical Society Main Journal on 29th September 2020
Star Formation in Isolated Disk Galaxies. II. Schmidt Laws and Efficiency of Gravitational Collapse
Creators: name: Li, Yuexing
name: Mac Low, Mordecai-Mark
name: Klessen, Ralf S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (Abridged). We model gravitational instability in a wide range of isolated disk galaxies, using GADGET, a three-dimensional, smoothed particle hydrodynamics code. The model galaxies include a dark matter halo and a disk of stars and isothermal gas. The global Schmidt law observed in disk galaxies is quantitatively reproduced by our models. We find that the surface density of star formation rate directly correlates with the strength of local gravitational instability. The local Schmidt laws of individual galaxies in our models show clear evidence of star formation thresholds. Our results suggest that the non-linear development of gravitational instability determines the local and global Schmidt laws, and the star formation thresholds.
description: 21 pages, 15 figures, to appear on ApJ March 2006. (Paper I is ApJ 626, 823, 2005, or astro-ph/0501022)
Performance Benchmarking of NewSQL Databases with Yahoo Cloud Serving Benchmark
Creators: name: Astrova, Irina
name: Koschel, Arne
name: Wellermann, Nils
name: Klostermeyer, Philip
Publisher: name: CISPA
Year: 2024

description: Selecting a NewSQL database product is an important process. Like any other successful data management technology, the product selected today begins to define the legacy of the future. There are many different parameters that can be used to evaluate the NewSQL DBMS alternatives, and there is no single most-correct process for conducting such an evaluation. Not only are there many possible pertinent evaluation criteria, but there also is typically a degree of uncertainty about the requirements and characteristics of the intended application environment. This paper focuses on three NewSQL databases (viz., VoltDB, MemSQL and NuoDB), with emphasis on evaluating their performance. The evaluation is done based on Yahoo Cloud Serving Benchmark.
U(1) symmetric recurrent neural networks for quantum state reconstruction
Creators: name: Morawetz, Stewart
name: De Vlugt, Isaac J. S.
name: Carrasquilla, Juan
name: Melko, Roger G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Generative models are a promising technology for the enhancement of quantum simulators. These machine learning methods are capable of reconstructing a quantum state from experimental measurements, and can aid in the calculation of physical observables. In this paper, we employ a recurrent neural network (RNN) to reconstruct the ground state of the spin-1/2 XY model, a prototypical Hamiltonian explored in trapped ion simulators. We explore its performance after enforcing a U(1) symmetry, which was recently shown by Hibat-Allah et al. [Phys. Rev. Research 2, 023358 (2020)] to preserve the autoregressive nature of the RNN. By studying the reconstruction of the XY model ground state from projective measurement data, we show that imposing U(1) symmetry on the RNN significantly increases the efficiency of learning, particularly in the early epoch regime. We argue that this performance increase may result from the tendency of the enforced symmetry to alleviate vanishing and exploding gradients, which helps stabilize the training process. Thus, symmetry-enforced RNNs may be particularly useful for applications of quantum simulators where a rapid feedback between optimization and circuit preparation is necessary, such as in hybrid classical-quantum algorithms.
description: 10 pages, 8 figures
A conjecture concerning the $q$-Onsager algebra
Creators: name: Terwilliger, Paul
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Algebra (math.QA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 17B37

description: The $q$-Onsager algebra $\mathcal O_q$ is defined by two generators $W_0, W_1$ and two relations called the $q$-Dolan/Grady relations. Recently Baseilhac and Kolb obtained a PBW basis for $\mathcal O_q$ with elements denoted $\lbrace B_{n δ+ α_0} \rbrace_{n=0}^\infty, \lbrace B_{n δ+ α_1} \rbrace_{n=0}^\infty, \lbrace B_{n δ} \rbrace_{n=1}^\infty $. In their recent study of a current algebra $\mathcal A_q$, Baseilhac and Belliard conjecture that there exist elements $\lbrace W_{-k}\rbrace_{k=0}^\infty, \lbrace W_{k+1}\rbrace_{k=0}^\infty, \lbrace G_{k+1} \rbrace_{k=0}^\infty, \lbrace {\tilde G}_{k+1} \rbrace_{k=0}^\infty$ in $\mathcal O_q$ that satisfy the defining relations for $\mathcal A_q$. In order to establish this conjecture, it is desirable to know how the elements in the second list above are related to the elements in the first list above. In the present paper, we conjecture the precise relationship and give some supporting evidence. This evidence consists of some computer checks on SageMath due to Travis Scrimshaw, and a proof of our conjecture for a homomorphic image of $\mathcal O_q$ called the universal Askey-Wilson algebra.
description: 25 pages, updated Intro, references added
title: The concept of ownership
Creators: name: Stollard, Sorley John Rosborough
Publisher: name: University of Glasgow
Year: 2024

description: There is no universally accepted definition of ownership, and this is a problem. This thesis explores this claim and then explains how a truly universal definition can be given with an analogy to MacCallum’s analysis of freedom. It will then explain the distinction between de facto and legitimate ownership before going on to present universal descriptions of both.

Having given the universal description of legitimate ownership this thesis will then demonstrate how Kant’s conception of ownership can be accommodated by it, before going on to use it to describe and analyse several conceptions of self-ownership and of intellectual property. Finally, this thesis will demonstrate how the universal description can be used as an evaluative tool by identifying split justifications within conceptions. This thesis will conclude with a summary and suggestions for further research.
A Characterization of the Degree Sequences of 2-Trees
Creators: name: Bose, Prosenjit
name: Dujmović, Vida
name: Krizanc, Danny
name: Langerman, Stefan
name: Morin, Pat
name: Wood, David R.
name: Wuhrer, Stefanie
Publisher: name: arXiv
Year: 2006
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: G.2.2

description: A graph G is a 2-tree if G=K_3, or G has a vertex v of degree 2, whose neighbours are adjacent, and Gǐs a 2-tree. A characterization of the degree sequences of 2-trees is given. This characterization yields a linear-time algorithm for recognizing and realizing degree sequences of 2-trees.
description: 17 pages, 5 figures
Measurement of the neutron decay electron-antineutrino angular correlation by the aCORN experiment
Creators: name: Hassan, M. T.
name: Byron, W. A.
name: Darius, G.
name: DeAngelis, C.
name: Wietfeldt, F. E.
name: Collett, B.
name: Jones, G. L.
name: Komives, A.
name: Noid, G.
name: Stephenson, E. J.
name: Bateman, F.
name: Dewey, M. S.
name: Gentile, T. R.
name: Mendenhall, M. P.
name: Nico, J. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The aCORN experiment measures the neutron decay electron-antineutrino correlation ($a$-coefficient) using a novel method based on an asymmetry in proton time-of-flight for events where the beta electron and recoil proton are detected in delayed coincidence. We report the data analysis and result from the second run at the NIST Center for Neutron Research, using the high-flux cold neutron beam on the new NG-C neutron guide end position: $a = -0.10758 \pm 0.00136 (\mbox{stat}) \pm 0.00148 (\mbox{sys})$. This is consistent within uncertainties with the result from the first aCORN run on the NG-6 cold neutron beam. Combining the two aCORN runs we obtain $a = -0.10782 \pm 0.00124 (\mbox{stat}) \pm 0.00133 (\mbox{sys})$, which has an overall relative standard uncertainty of 1.7 \%. The corresponding result for the ratio of weak coupling constants $λ= G_A/G_V$ is $λ= -1.2796\pm 0.0062$.
description: 44 pages, 30 figures