cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Insights into Solar Wind Flow Speeds from the Coronal Radio occultation Experiment: Findings from the Indian Mars Orbiter Mission
Creators: name: Aggarwal, Keshav
name: Choudhary, R. K.
name: Datta, Abhirup
name: V., Roopa M.
name: Dai, Bijoy K.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using data collected by the Indian Mars Orbiter Mission in October 2021, we investigated coronal regions of the Sun by analyzing the Doppler spectral width of radio signals to estimate solar wind velocity. A simplified equation is introduced to directly relate these two parameters. The study focuses on observations conducted from October 2 to October 14, 2021, a relatively quiet phase of solar cycle 25. The analysis targeted the coronal region within heliocentric distances of 5-8 RSun, near the ecliptic plane. In this region, solar wind velocities ranged from 100 to 150 kms^-1, while electron densities were on the order of 10^10 m^(-3). We also compared our results with electron density observations and models derived from previous studies. Though the decrease in the electron densities with respect to increasing helio-centric distance matches quite well with the theoretical models, MOM estimates fall at the lower edge of the distribution. This difference may be attributed to the prolonged weak solar activity during the MOM observations, in contrast to prior studies conducted during periods of comparatively higher solar activity in earlier solar cycles.
description: 27 pages, 7 figures, Accepted for publication in ApJ
Internet TV portuguesa nas redes sociais
Creators: name: Fonseca, Ivo
name: Marques, Ricardo
name: Pereira, Hugo
Publisher: name: Internet Latent Corpus Journal
Year: 2014

description: Este estudo pretendeu avaliar o nível de relação parassocial existente entre espectadores de televisão pela Internet (IPTV) e os media de cujo consumo usufruem, explorando-se em particular as diferenças de interacção que se encontram nas redes sociais de canais de TV de nível nacional, em comparação com os canais de nível regional. Avaliou-se o corpus latente de dados dos espectadores de 2 canais de televisão disponíveis na Internet – a TVI, de nível nacional, e a Localvisão Viseu, de nível regional – através da análise de conteúdo dos seus comentários no Facebook. A partir dos dados recolhidos, concluiu-se que a TVI proporciona mais condições de criação de relações parassociais, efectivamente criando na sua audiência uma ilusão mais concreta de relação interpessoal.
description: Internet Latent Corpus Journal, vol. 4 n.º 2 (2014)
Melnick 33Na: a very massive colliding wind binary system in 30 Doradus
Creators: name: Bestenlehner, Joachim M.
name: Crowther, Paul A.
name: Broos, Patrick S.
name: Pollock, Andrew M. T.
name: Townsley, Leisa K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present spectroscopic analysis of the luminous X-ray source Melnick 33Na (Mk 33Na, HSH95 16) in the LMC 30 Doradus region (Tarantula Nebula), utilising new time-series VLT/UVES spectroscopy. We confirm Mk 33Na as a double-lined O-type spectroscopic binary with a mass ratio $q = 0.63 \pm 0.02$, $e = 0.33 \pm 0.01$ and orbital period of $18.3 \pm 0.1$ days, supporting the favoured period from X-ray observations obtained via the Tarantula -- Revealed by X-rays (T-ReX) survey. Disentangled spectra of each component provide spectral types of OC2.5 If* and O4 V for the primary and secondary respectively - unusually for an O supergiant the primary exhibits strong CIV 4658 emission and weak NV 4603-20, justifying the OC classification. Spectroscopic analysis favours extreme physical properties for the primary ($T_{\rm eff} = 50$ kK, $\log L/L_{\odot} = 6.15$) with system components of $M_{1} = 83 \pm 19 M_{\odot}$ and $M_{2} = 48 \pm 11 M_{\odot}$ obtained from evolutionary models, which can be reconciled with results from our orbital analysis (e.g. $M_{1} \sin^3 i = 20.0 \pm 1.2 M_{\odot}$) if the system inclination is $\sim 38^{\circ}$ and it has an age of 0.9 to 1.6 Myr. This establishes Mk 33Na as one of the highest mass binary systems in the LMC, alongside other X-ray luminous early-type binaries Mk34 (WN5h+WN5h), R144 (WN5/6h+WN6/7h) and especially R139 (O6.5\,Iafc+O6\,Iaf).
description: Accepted for publication in MNRAS, 16 pages and 14 figures plus supplementary material
The space of ideals in the minimal tensor product of $C^*$-algebras
Creators: name: Lazar, Aldo J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L06

description: For $C^*$-algebras $A_1, A_2$ the map $(I_1,I_2)\to ker(q_{I_1}\otimes q_{I_2})$ from $Id^{\prime}(A_1)\times Id^{\prime}(A_2)$ into $Id^{\prime}(A_1\otimes_{\mathrm{min}} A_2) is a homeomorphism onto its image which is dense in the range. Here, for a $C^*$-algebra $A$, the space of all proper closed two sided ideals endowed with an adequate topology is denoted $Id^{\prime}(A)$ and $q_I$ is the quotient map of $A$ onto $A/I$. New proofs of the equivalence of the property (F) of Tomiyama for $A_1\otimes_{\mathrm{min}} A_2$ with certain other properties are presented.
description: 9 pages, minor mistakes were corrected
Additional file 1 of Understanding the groups of care transition strategies used by U.S. hospitals: an application of factor analytic and latent class methods
Creators: name: Mays, Glen
name: Li, Jing
name: Clouser, Jessica Miller
name: Du, Gaixin
name: Stromberg, Arnold
name: Jack, Brian
name: Nguyen, Huong Q.
name: Williams, Mark V.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 1. Retrospective Study Model Covariates and Data Sources.
Boas práticas e tendências de uso das tecnologias da comunicação no Ensino Superior
Creators: name: Batista, João
name: Pombo, Lúcia
name: Coelho, Dalila
name: Ramos, Fernando
Publisher: name: Internet Latent Corpus Journal
Year: 2014

description: Neste artigo apresentam-se e discutem-se boas práticas e tendências, em relação aos usos das Tecnologias da Comunicação identificados em Instituições de Ensino Superior públicas Portuguesas, a partir da visão dos seus dirigentes institucionais e dos seus docentes. Para este trabalho de investigação, realizado no âmbito do projecto TRACER, foi desenvolvida e administrada uma ficha de caracterização, destinada a ser preenchida pelos dirigentes com responsabilidades ao nível das Tecnologias da Comunicação, e foram conduzidas entrevistas semiestruturadas a docentes. As tendências atuais indicam a progressiva integração de Tecnologias da Comunicação nos processos de ensino e aprendizagem e uma atenção especial para a necessidade de formação para o uso pedagógico destas tecnologias. Os resultados sugerem que as opções institucionais exercem alguma influência sobre as práticas dos docentes ao nível do ensino e aprendizagem. O artigo apresenta alguns exemplos de práticas inovadoras, cujo alcance não se esgota nos seus contextos imediatos, antes constituindo exemplo de boas práticas.
description: Internet Latent Corpus Journal, vol. 4 n.º 2 (2014)
Seaspace use and control : a case in the Gulf of Georgia
Creators: name: Nelson, Christopher Douglas
Publisher: name: University of British Columbia
Year: 2011

description: This study analyzes the development and growth of commercial, industrial, and recreational water-oriented activities in the Gulf of Georgia from the traditional pre-European roots of the eighteenth century through to the present. At the same time the development and implementation of legal and administrative measures invoked to manage this coastal sea and regulate maritime functional users is examined chronologically, and in relation to the effect on patterns of water use. On the strength of this investigation, it was found that the Gulf of Georgia is a dynamic seascape which has, over the years, performed as a geographical bond rather than a barrier to the development of the British Columbia coastland. Whereas in the traditional seascape economically motivated water use practices predominated, more recently the Gulf of Georgia has exhibited almost equal use as a cultural and recreational area. Correspondingly, administrative controls and maritime regulations which followed closely on the heels of political partitioning have from the outset tended to compliment economic uses of the marine environment. The development of domestic legislation geared to the dynamic maritime situations, to effective multiple use, and to the protection of more aesthetic individual activities or to sensitive ecological-oceanographic areas has been slow to materialize. It was found that future demand for sea space by a wide range of users dictates legal controls and management practices which cater to cultural as well as economic concerns. To attain this goal more stringent management programs must be applied to the Gulf of Georgia which would effectively provide a range of alternatives for each functional activity while protecting and maintaining the quality of the marine environment at acceptable levels for all users. Seaspace zoning, marine traffic control systems, and marine parks are suggested as techniques which may be usefully applied to successfully manage the Gulf of Georgia coastland environment.
Supplementary document for Theoretical Prediction of the Effective Dynamic Dielectric Constant of Disordered Hyperuniform Anisotropic Composites Beyond the Long-Wavelength Regime - 6760333.pdf
Creators: name: Kim, Jaeuk
name: torquato, salvatore
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: supplement 1
A 2+1+1 quadruple star system containing the most eccentric, low-mass, short-period, eclipsing binary known
Creators: name: Han, E.
name: Rappaport, S. A.
name: Vanderburg, A.
name: Tofflemire, B. M.
name: Borkovits, T.
name: Schwengeler, H. M.
name: Zasche, P.
name: Krolikowski, D. M.
name: Muirhead, P. S.
name: Kristiansen, M. H.
name: Terentev, I. A.
name: Omohundro, M.
name: Gagliano, R.
name: Jacobs, T.
name: LaCourse, D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present an analysis of a newly discovered 2+1+1 quadruple system with TESS containing an unresolved eclipsing binary (EB) as part of TIC 121088960 and a close neighbor TIC 121088959. The EB consists of two very low-mass M dwarfs in a highly-eccentric ($e$ = 0.709) short-period ($P$ = 3.04358 d) orbit. Given the large pixel size of TESS and the small separation (3.9$"$) between TIC 121088959 and TIC 121088960, we used light centroid analysis of the difference image between in-eclipse and out-of-eclipse data to show that the EB likely resides in TIC 121088960, but contributes only $\sim$10% of its light. Radial velocity data were acquired with iSHELL at NASA's Infrared Facility and the Coud${é}$ spectrograph at the McDonald 2.7-m telescope. For both images, the measured RVs showed no variation over the 11-day observational baseline, and the RV difference between the two images was $8 \pm 0.3$ km s$^{-1}$. The similar distances and proper motions of the two images indicate that TIC 121088959 and TIC 121088960 are a gravitationally bound pair. Gaia's large RUWE and astrometric_excess_noise parameters for TIC 121088960, further indicate that this image is the likely host of the unresolved EB and is itself a triple star. We carried out an SED analysis and calculated stellar masses for the four stars, all of which are in the M dwarf regime: 0.19 M$_\odot$ and 0.14 M$_\odot$ for the EB stars and 0.43 M$_\odot$ and 0.39 M$_\odot$ for the brighter visible stars, respectively. Lastly, numerical simulations show that the orbital period of the inner triple is likely the range 1 to 50 years.
Fermion and gluon spectral functions far from equilibrium
Creators: name: Boguslavski, Kirill
name: Lappi, Tuomas
name: Schlichting, Sören
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Motivated by the quark-gluon plasma, we develop a simulation method to obtain the spectral function of (Wilson) fermions non-perturbatively in a non-Abelian gauge theory with large gluon occupation numbers [arXiv:2106.11319]. We apply our method to a non-Abelian plasma close to its non-thermal fixed point, i.e., in a far-from-equilibrium self-similar regime, and find mostly very good agreement with perturbative hard loop (HTL) calculations. For the first time, we extract the full momentum dependence of the damping rate of fermionic collective excitations and compare our results to recent non-perturbative extractions of gluonic spectral functions in two and three spatial dimensions [arXiv:2101.02715, arXiv:1804.01966].
description: 8 pages, 5 figures; Talk given at the Virtual Tribute to Quark Confinement and the Hadron Spectrum (vConf21), Stavanger, Norway, August 2nd - 6th, 2021
Electron-phonon heat transfer in giant vortex states
Creators: name: Samokhvalov, A. V.
name: Shereshevskii, I. A.
name: Vdovicheva, N. K.
name: Taupin, M.
name: Khaymovich, I. M.
name: Mel'nikov, A. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We examine energy relaxation of non-equilibrium quasiparticles in different vortex configurations in ``dirty'' $s$-wave superconductors. The heat flow from the electronic subsystem to phonons in a mesoscopic superconducting disk with a radius of the order of several coherence lengths is calculated both in the Meissner and giant vortex states using the Usadel approach. The recombination process is shown to be strongly affected by interplay of the subgap states, located in the vortex core and in the region at the sample edge where the spectral gap $E_{\rm g}$ is reduced by the Meissner currents. In order to uncover physical origin of the results, we develop a semiquantitative analytical approximation based on the combination of homogeneous solutions of Usadel equations in Meissner and vortex states of a mesoscopic superconducting disc and analytically calculate the corresponding spatially resolved electron-phonon heat rates. Our approach provides an important information about non-equilibrium quasiparticles cooling by the magnetic-field induced traps in various mesoscopic superconducting devices.
description: 9 pages, 8 figures, 80 references + 4 pages of Appendices and references. arXiv admin note: text overlap with arXiv:1901.01263
Spartan philachaianism
Creators: name: Pettit, Robert George William
Publisher: name: University of British Columbia
Year: 2011

description: During the first quarter of the sixth century Sparta was at war with Tegea. Shortly after 575 Sparta was badly defeated at the Battle of the Fetters. As a result of this defeat Sparta gave up conquest and sought instead to build up a league. To help her win over the non-Dorian states, she adopted philachaianism, a claim that she had Achaian connexions to her Dorian descent. The widely held belief that philachaianism was instituted by the ephor Chilon as part of a constitutional struggle is incorrect. A fragment of papyrus in the John Rylands collection at Manchester reveals that in 555 Sparta deposed the last Orthagorid tyrant of Sikyon, Aischines. This was done because the Orthagorids, through their anti-Dorianism, were potential rivals for the leadership of the non-Dorians and Sparta was beginning to have close relations with Sikyon's enemy, Korinth.
CLIMBER: Galaxy-Halo Connection Constraints from Next-Generation Surveys
Creators: name: Pearl, Alan N.
name: Bezanson, Rachel
name: Zentner, Andrew R.
name: Newman, Jeffrey A.
name: Goulding, Andy D.
name: Whitaker, Katherine E.
name: Johnson, Sean D.
name: Greene, Jenny E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In the coming decade, a new generation of massively multiplexed spectroscopic surveys, such as PFS, WAVES, and MOONS, will probe galaxies in the distant universe in vastly greater numbers than was previously possible. In this work, we generate mock catalogs for each of these three planned surveys to help quantify and optimize their scientific output. To assign photometry into the UniverseMachine empirical model, we develop the Calibrating Light: Illuminating Mocks By Empirical Relations (CLIMBER) procedure using UltraVISTA photometry. Using the published empirical selection functions for each aforementioned survey, we quantify the mass completeness of each survey. We compare different targeting strategies by varying the area and targeting completeness, and quantify how these survey parameters affect the uncertainty of the two-point correlation function. We demonstrate that the PFS and MOONS measurements will be primarily dominated by cosmic variance, not shot noise, motivating the need for increasingly large survey areas. On the other hand, the WAVES survey, which covers a much larger area, will strike a good balance between cosmic variance and shot noise. For a fixed number of targets, a 5% increased survey area (and $\sim$5% decreased completeness) would decrease the uncertainty of the correlation function at intermediate scales by 0.15%, 1.2%, and 1.1% for our WAVES, PFS, and MOONS samples, respectively. Meanwhile, for a fixed survey area, 5% increased targeting completeness improves the same constraints by 0.7%, 0.25%, and 0.1%. All of the utilities used to construct our mock catalogs and many of the catalogs themselves are publicly available.
Ferramentas de apoio à sustentabilidade na gestão da cadeia de fornecimento: análise qualitativa de relatórios de sustentabilidade
Creators: name: Silva, Cláudia De Sousa E
name: Gouveia, Joaquim Borges
name: Costa, António Pedro
Publisher: name: Internet Latent Corpus Journal
Year: 2014

description: A Sustentabilidade tem vindo a assumir um papel de relevância nas sociedades. A conjuntura económica, as alterações climáticas, a escassez de recursos e as desigualdades sociais caraterizam o contexto atual. As empresas contribuíram para este cenário, logo têm de fazer parte da solução. Deparam-se com um paradigma desafiante, pois tem de desenvolver mecanismos que permitam que as suas atividades sejam desenvolvidas numa perspetiva cooperativa, com horizonte no futuro e sustentadas na maximização do resultado líquido económico, ambiental e social. Um dos objetivos deste trabalho de investigação é contribuir com a identificação de ferramentas de apoio à gestão da sustentabilidade implementadas na cadeia de fornecimento. E, ao mesmo tempo, perceber se os vetores ambiental, económico e social são integrados nessas ferramentas. Através da análise qualitativa dos documentos de sustentabilidade publicados por três empresas: EDP, AutoEuropa, Gestamp Aveiro, é apresentado um modelo de classificação das ferramentas de apoio à sustentabilidade, com inclusão de exemplos práticos. Conclui-se que estas empresas, com a implementação de ferramentas de apoio á sustentabilidade, incluem nas suas práticas de gestão da cadeia de fornecimento os critérios económico, social e ambiental.
description: Internet Latent Corpus Journal, vol. 4 n.º 2 (2014)
Ambientalização do Ensino Superior: um olhar sobre os grupos de pesquisa da Universidade Federal Rural de Pernambuco
Creators: name: Melo, Constance Majoi Fabrício De
name: Santana, Raquel Eufrázio De
name: Silva, Renata Priscila Da
name: Farias, Carmen Roselaine De Oliveira
Publisher: name: Internet Latent Corpus Journal
Year: 2014

description: A pesquisa objetiva investigar processos de ambientalização do ensino superior, os quais se expressam na inserção de temáticas ambientais nas instituições. Para tal, como contexto de pesquisa, foi investigada a Universidade Federal Rural de Pernambuco, Brasil, através do olhar sobre os grupos de pesquisa. Os grupos cadastrados no Diretório dos Grupos de Pesquisa no Brasil, pertencente ao Conselho Nacional de Desenvolvimento Científico e Tecnológico – CNPq, que apresentaram temáticas ambientais, tiveram seus perfis analisados a partir do corpus de dados latente na internet. A pesquisa foi realizada através da análise do conteúdo, numa perspectiva qualitativa. Para a análise dos dados, foram criadas, com o auxílio do software WebQDA, dimensões, categorias e subcategorias. Foram identificados vinte e sete grupos contendo temáticas ambientais, fundados entre 1995 e 2013, distribuídos entre dez departamentos acadêmicos. Foi observada a prevalência da perspectiva socioambiental na maioria dos grupos, apresentando objetivos conservacionistas.
description: Internet Latent Corpus Journal, vol. 4 n.º 2 (2014)
Tipologia e codificação de dados Corpus Latente na Internet
Creators: name: Souza, Francislê Neri De
Publisher: name: Internet Latent Corpus Journal
Year: 2014

description: A investigação científica nas ciências humanas e sociais, como as demais áreas científicas, necessitam de evidências e argumentos estruturados para responderem as suas questões de investigação. Estas evidências argumentativas tem por base a análise de dados. Na nossa visão estes dados podem ser resumidos em dois tipos gerais: i) os numéricos e estruturados, e os ii) não-numéricos e não-estruturados. Os dados numéricos e estruturados, recorrem a uma codificação em matrizes de números e da análise estatística para construir seu argumento. Por sua vez, os dados não-numérico e não-estruturados que têm por base a palavra ou o discurso, podem seguir caminhos diversificados de codificação e análise. Geralmente estas codificações acabam por seguir uma lógica taxionómica categorial, muitas vezes hierárquica, para conjugar uma síntese e uma análise dos dados não-numéricos. (...)
description: Internet Latent Corpus Journal, vol. 4 n.º 2 (2014)
Physical Structure and Dust Reprocessing in a sample of HH Jets
Creators: name: Podio, L.
name: Medves, S.
name: Bacciotti, F.
name: Eislöffel, J.
name: Ray, T. P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the physical structure and dust reprocessing in the shocks along the beam of a number of classical Herbig-Haro jets in the Orion and Lupus molecular cloud. Spectral diagnostic techniques are applied to obtain the jet physical conditions from the ratios between selected forbidden lines. The presence of dust grains is investigated by estimating the gas-phase abundance of calcium with respect to its Solar value. We find the electron density, ne, varies between 0.05-4 10^3 cm^-3, the ionisation fraction, xe, is 0.01-0.7, the temperature, te, ranges between 0.6-3 10^4 K, and the hydrogen density between 0.01-6 10^4 cm^-3. Interestingly, in the HH 111 jet, ne, xe, and te, peak in the High Velocity Interval (HVI) of the strongest working surfaces, confirming the prediction from shocks models. Calcium turns out to be depleted with respect to its Solar value, but its gas-phase abundance is higher than that estimated in the interstellar medium in Orion. The depletion is high (up to 80%) along the low-excited jets, while low or no depletion is measured in the jets which show higher excitation conditions. Moreover, in HH 111 the depletion is lower in the HVI of the faster shock. Our results confirm the shock structure predicted by models and indicate that the shocks occurring along the jets are partially destroying the dust grains and that the efficiency of dust reprocessing strongly depend on shock velocity. However, the high Ca gas-phase abundance estimated in some of the knots is not well justified by existing models of dust reprocessing in shocks, and indicates that the dust must have been partially reprocessed in the region where the flow originates.
description: 13 pages, 12 figures, accepted for publication on AandA
Warm Absorbers in the Radiation-driven Fountain Model of Low-mass Active Galactic Nuclei
Creators: name: Ogawa, Shoji
name: Ueda, Yoshihiro
name: Wada, Keiichi
name: Mizumoto, Misaki
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: To investigate the origins of the warm absorbers in active galactic nuclei (AGNs), we study the ionization-state structure of the radiation-driven fountain model in a low-mass AGN (Wada et al. 2016) and calculate the predicted X-ray spectra, utilizing the spectral synthesis code Cloudy (Ferland et al. 2017). The spectra show many absorption and emission line features originated in the outflowing ionized gas. The O VIII 0.654 keV lines are produced mainly in the polar region much closer to the SMBH than the optical narrow line regions. The absorption measure distribution of the ionization parameter ($ξ$) at a low inclination spreads over 4 orders of magnitude in $ξ$, indicating multi-phase ionization structure of the outflow, as actually observed in many type-1 AGNs. We compare our simulated spectra with the high energy-resolution spectrum of the narrow line Seyfert 1 galaxy, NGC 4051. The model reproduces slowly outflowing (a few hundreds km s$^{-1}$) warm absorbers. However, the faster components with a few thousands km s$^{-1}$ observed in NGC 4051 are not reproduced. The simulation also underproduces the intensity and width of the O VIII 0.654 keV line. These results suggest that the ionized gas launched from sub-parsec or smaller regions inside the torus, which are not included in the current fountain model, must be important ingredients of the warm absorbers with a few thousands km s$^{-1}$. The model also consistently explains the Chandra/HETG spectrum of the Seyfert 2 galaxy, the Circinus galaxy.
description: 13 pages, 13 figures, accepted for publication in ApJ
Linguistic diversity in Aveiro, Portugal: exploring linguistic landscape methodologies in the «Beira Mar» neighborhood
Creators: name: Clemente, Mariana Ribeiro
name: Vieira, Rui
name: Martins, Filomena
name: Andrade, Ana Isabel
Publisher: name: Internet Latent Corpus Journal
Year: 2013

description: The present exploratory study aims to reflect upon some aspects of the linguist diversity within the linguistic landscape of a Portuguese city (Aveiro). We will first present some of the most common choices, debates and innovative approaches concerning research methodologies in linguistic landscape studies. Secondly, we will present the analysis of the linguistic diversity displayed in the linguistic landscape of the « Beira Mar» neighborhood of Aveiro. The analysis shows that English is the foreign language with the greatest presence in all areas of activity and in monolingual, bilingual and multilingual signs. Within the results we also discuss the choices that were made and the impact of inclusion/exclusion criteria assumed in this exploratory study.
description: Internet Latent Corpus Journal, vol. 3 n.º 1 (2013)
Supplementary document for Twin-field quantum key distribution with optical injection locking and phase encoding on-chip - 7117104.pdf
Creators: name: Du, Han
name: Paraiso, Taofiq
name: Pittaluga, Mirko
name: San Lo, Yuen
name: Dolphin, Joseph
name: Shields, Andrew
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: supplementary information
Isospin breaking effects in the dynamical generation of the X(3872)
Creators: name: Gamermann, D.
name: Nieves, J.
name: Oset, E.
name: Arriola, E. Ruiz
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have studied isospin breaking effects in the X(3872) resonance and found a natural explanation for the branching fraction of the X decaying to $J/ψ$ with two and three pions being close to unit. Within our framework the X(3872) is a dynamically generated resonance in coupled channels. We also study the relationship between the couplings of the resonance to the coupled channels with its wave function, which further helps us to understand the isospin structure of the resonance.
description: 5 pages, 1 figure. To appear in the Proceedings of XIII International Conference on Hadron Spectroscopy, November 29 - December 4, 2009, Florida State University
Análise da literacia científica dos utilizadores do YouTube no National Geographic
Creators: name: Duarte, Paulo
name: Soares, Rui
Publisher: name: Internet Latent Corpus Journal
Year: 2013

description: A propagação/expansão da Internet e o desenvolvimento de plataformas colaborativas permitiu que o utilizador pudesse intervir e participar ativamente na Web. A quantidade e qualidade de dados disponíveis na rede possibilitam um mundo novo por explorar. Nesse sentido este trabalho visou analisar algumas interações dos utilizadores do YouTubeTM. Para isso partiu-se de um corpus de dados retirado do National GeographicTM entre Janeiro de 2008 e Abril de 2012. O estudo qualitativo envolveu a análise de conteúdo de 360 comentários e descritiva de seis vídeos no WebQDA. Os resultados obtidos permitiram conhecer o posicionamento dos utilizadores face às alterações climáticas antropogénicas, bem como os atributos e níveis de literacia científica apontando alguns caminhos para investigações futuras.
description: Internet Latent Corpus Journal, vol. 3 n.º 1 (2013)
Mercury as the relic of Earth and Venus' outward migration
Creators: name: Clement, Matthew S.
name: Raymond, Sean N.
name: Chambers, John E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: In spite of substantial advancements in simulating planet formation, the planet Mercury's diminutive mass, isolated orbit, and the absence of planets with shorter orbital periods in the solar system continue to befuddle numerical accretion models. Recent studies have shown that, if massive embryos (or even giant planet cores) formed early in the innermost parts of the Sun's gaseous disk, they would have migrated outward. This migration may have reshaped the surface density profile of terrestrial planet-forming material and generated conditions favorable to the formation of Mercury-like planets. Here, we continue to develop this model with an updated suite of numerical simulations. We favor a scenario where Earth and Venus' progenitor nuclei form closer to the Sun and subsequently sculpt the Mercury-forming region by migrating towards their modern orbits. This rapid formation of ~0.5 Earth-mass cores at ~0.1-0.5 au is consistent with modern high-resolution simulations of planetesimal accretion. In successful realizations, Earth and Venus accrete mostly dry, Enstatite Chondrite-like material as they migrate; thus providing a simple explanation for the masses of all four terrestrial planets, inferred isotopic differences between Earth and Mars, and Mercury's isolated orbit. Furthermore, our models predict that Venus' composition should be similar to the Earth's, and possibly derived from a larger fraction of dry material. Conversely, Mercury analogs in our simulations attain a range of final compositions.
description: 10 pages, 3 figures, 1 table, accepted for publication in ApJL
Path integral duality modified propagators in spacetimes with constant curvature
Creators: name: Kothawala, Dawood
name: Sriramkumar, L.
name: Shankaranarayanan, S.
name: Padmanabhan, T.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The hypothesis of path integral duality provides a prescription to evaluate the propagator of a free, quantum scalar field in a given classical background, taking into account the existence of a fundamental length, say, the Planck length, $\lp$, in a {\it locally Lorentz invariant manner}. We use this prescription to evaluate the duality modified propagators in spacetimes with {\it constant curvature} (exactly in the case of one spacetime, and in the Gaussian approximation for another two), and show that: (i) the modified propagators are ultra violet finite, (ii) the modifications are {\it non-perturbative} in $\lp$, and (iii) $\lp$ seems to behave like a `zero point length' of spacetime intervals such that $ł< σ^2(x,x')\r> = ł[σ^{2}(x,x')+ {\cal O}(1) \lp^2 \r]$, where $σ(x,x')$ is the geodesic distance between the two spacetime points $x$ and $x'$, and the angular brackets denote (a suitable) average over the quantum gravitational fluctuations. We briefly discuss the implications of our results.
description: v1. 10 pages, no figures; v2. 11 pages, acknowledgments added
Pattern-Aware Data Augmentation for LiDAR 3D Object Detection
Creators: name: Hu, Jordan S. K.
name: Waslander, Steven L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Autonomous driving datasets are often skewed and in particular, lack training data for objects at farther distances from the ego vehicle. The imbalance of data causes a performance degradation as the distance of the detected objects increases. In this paper, we propose pattern-aware ground truth sampling, a data augmentation technique that downsamples an object's point cloud based on the LiDAR's characteristics. Specifically, we mimic the natural diverging point pattern variation that occurs for objects at depth to simulate samples at farther distances. Thus, the network has more diverse training examples and can generalize to detecting farther objects more effectively. We evaluate against existing data augmentation techniques that use point removal or perturbation methods and find that our method outperforms all of them. Additionally, we propose using equal element AP bins to evaluate the performance of 3D object detectors across distance. We improve the performance of PV-RCNN on the car class by more than 0.7 percent on the KITTI validation split at distances greater than 25 m.
description: Published paper in the IEEE Intelligent Transportation Systems Conference - ITSC 2021
Follow-up observations at 16 and 33 GHz of extragalactic sources from WMAP 3-year data: II - Flux-density variability
Creators: name: Franzen, Thomas M. O.
name: Davies, Matthew L.
name: Davies, Rod D.
name: Davis, Richard J.
name: Feroz, Farhan
name: Genova-Santos, Ricardo
name: Grainge, Keith J. B.
name: Green, David A.
name: Hobson, Michael P.
name: Hurley-Walker, Natasha
name: Lasenby, Anthony N.
name: Lopez-Caniego, Marcos
name: Olamaie, Malak
name: Padilla-Torres, Carmen P.
name: Pooley, Guy G.
name: Rebolo, Rafael
name: Rodriguez-Gonzalvez, Carmen
name: Saunders, Richard D. E.
name: Scaife, Anna M. M.
name: Scott, Paul F.
name: Shimwell, Timothy W.
name: Titterington, David J.
name: Waldram, Elizabeth M.
name: Watson, Robert A.
name: Zwart, Jonathan T. L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using the Arcminute Microkelvin Imager (AMI) at 16 GHz and the Very Small Array (VSA) at 33 GHz to make follow-up observations of sources in the New Extragalactic WMAP Point Source Catalogue, we have investigated the flux-density variability in a complete sample of 97 sources over timescales of a few months to approximately 1.5 years. We find that 53 per cent of the 93 sources, for which we have multiple observations, are variable, at the 99 per cent confidence level, above the flux density calibration uncertainties of approximately 4 per cent at 16 GHz; the fraction of sources having varied by more than 20 per cent is 15 per cent at 16 GHz and 20 per cent at 33 GHz. Not only is this common occurrence of variability at high frequency of interest for source physics, but strategies for coping with source contamination in CMB work must take this variability into account. There is no strong evidence of a correlation between variability and flux density for the sample as a whole. Using a maximum-likelihood method, we calculate the correlation in the variability at the two frequencies in a subset of sources classified as variable from both the AMI and VSA data and find the Pearson product-moment correlation coefficient to be very high (0.955 +/- 0.034). We also find the degree of variability at 16 GHz (0.202 +/- 0.028) to be very similar to that at 33 GHz (0.224 +/- 0.039). Finally, we have investigated the relationship between variability and spectral index, alpha_13.9^33.75 (where S proportional to nu^-alpha), and find a significant difference in the spectral indices of the variable sources (-0.06 +/- 0.05) and non-variable sources (0.13 +/- 0.04).
description: 12 pages and 10 figures
Avaliação da qualidade de tutoriais Moodle no YouTube
Creators: name: Brigham, André
name: Amorim, Filomena
name: Neves, Luís
Publisher: name: Internet Latent Corpus Journal
Year: 2013

description: O YouTube representa um espaço privilegiado para a partilha de conteúdos em diversas áreas do conhecimento, podendo o seu largo espectro de dados representar potencial para a investigação de cariz científico. Este estudo tem por objetivo a análise do Corpus de Dados Latente disponível no YouTube, como elemento de identificação de tendências de qualidade dos conteúdos disponibilizados, no caso específico dos tutoriais em formato vídeo sobre funcionalidades do Moodle. A metodologia deste estudo é essencialmente orientada para um paradigma qualitativo que, apoiado em alguns aspetos quantitativos, propõe uma abordagem exploratória e descritiva do problema.
description: Internet Latent Corpus Journal, vol. 3 n.º 1 (2013)
Cylindrical cavity expansion analysis under partially drained conditions for normalisation of excess water pressure in CPTU
Creators: name: Yang, He
name: Zhuang, Pei-Zhi
name: Yu, Hai-Sui
name: Mo, Pin-Qiang
name: Ma, Yue
name: Chen, Xiaohui
name: Schnaid, Fernando
Publisher: name: arXiv
Year: 2025
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Cone tip resistance and excess water pressure (EWP) measured by piezocone penetration tests (CPTU) may be significantly affected by the partially drained effect in soils with intermediate permeability. To capture this effect, the paper proposes a straightforward, hydro-mechanical coupling solution for cylindrical cavity expansion under partially drained conditions. The mechanical behaviour of soils is modelled using the elastoplastic Tresca model and water flow within porous soils is assumed to obey Darcys law. Two partial differential equations (PDEs) are established in the elastic and plastic zones, respectively, transforming the cavity expansion analysis into a typical Stefan problem with dynamic boundary conditions (i.e. a moving boundary at the elastoplastic interface). An approximate solution for the PDEs is derived by leveraging the variable transformation method. Based on the new solution, a novel normalised penetration rate is defined considering the rigidity index of soils, with which a unique backbone curve for CPTU is found. Finally, the backbone curve is compared with a database comprising 109 in-situ experimental tests, 101 centrifuge modelling tests, and numerical simulation results. The proposed solution may provide a useful theoretical tool for interpreting the consolidation coefficient of fine-grained soils from the penetration stage of multi-rate CPTU, which can enhance the interpretation reliability for CPTU dissipation tests.
Precise selection of legumes for fish
Creators: name: Moutou, Katerina A.
Publisher: name: Zenodo
Year: 2021
Subjects: Fish feed
Legumes
Aquaculture

description: Legumes are protein-rich crops that can be suitable ingredients for fish feed. Soybean meal has been widely used in fish feed formulations. However, the bioavailability of the legume protein varies between fish species. Moreover, legumes often contain anti-nutritional factors that impair digestion and phytoestrogens that might suppress growth. Suitable screening methods can determine the level and effect of these substances precisely and support informed choice of legumes for use in fish feed manufacturing.
Evaluating Gradient Inversion Attacks and Defenses in Federated Learning
Creators: name: Huang, Yangsibo
name: Gupta, Samyak
name: Song, Zhao
name: Li, Kai
name: Arora, Sanjeev
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Gradient inversion attack (or input recovery from gradient) is an emerging threat to the security and privacy preservation of Federated learning, whereby malicious eavesdroppers or participants in the protocol can recover (partially) the clients' private data. This paper evaluates existing attacks and defenses. We find that some attacks make strong assumptions about the setup. Relaxing such assumptions can substantially weaken these attacks. We then evaluate the benefits of three proposed defense mechanisms against gradient inversion attacks. We show the trade-offs of privacy leakage and data utility of these defense methods, and find that combining them in an appropriate manner makes the attack less effective, even under the original strong assumptions. We also estimate the computation cost of end-to-end recovery of a single image under each evaluated defense. Our findings suggest that the state-of-the-art attacks can currently be defended against with minor data utility loss, as summarized in a list of potential strategies. Our code is available at: https://github.com/Princeton-SysML/GradAttack.
Calculation of the unitary part of the Bures measure for N-level quantum systems
Creators: name: Cabrera, Renan
name: Rabitz, Herschel
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We use the canonical coset parameterization and provide a formula with the unitary part of the Bures measure for non-degenerate systems in terms of the product of even Euclidean balls. This formula is shown to be consistent with the sampling of random states through the generation of random unitary matrices.
Significados scripto-visuais nos jornais e implicações didáticas
Creators: name: Lopes, Rui
name: Rodrigues, Fernando
name: Graça, Marta
name: Marques, António Pedro
Publisher: name: Internet Latent Corpus Journal
Year: 2013

description: A partir da observação da primeira página impressa de jornais diários e semanários, disponíveis na Internet, procedeu-se à análise da relação texto-imagem como objeto de comunicação scripto-visual. No sentido de compreender melhor a importância desta, sob o ponto de vista didático, empreendeu-se um estudo exploratório, de natureza qualitativa. A finalidade deste estudo consistiu em analisar de que forma o design de edição da primeira página de 6 jornais diários e de 2 semanários, se constitui objeto de comunicação e comparar as abordagens relativamente aos assuntos emergentes nas datas de recolha da informação. A análise comparativa permitiu estabelecer diferenças quanto ao público-alvo, perceber a capacidade dos jornais na mobilização de um potencial didático e compreender de que forma estes assumem um lugar na educação e na promoção da cidadania.
description: Internet Latent Corpus Journal, vol. 3 n.º 1 (2013)
Room temperature surface piezoelectricity in SrTiO3 ceramics via piezoresponse force microscopy
Creators: name: Kholkin, Andrei
name: Bdikin, Igor
name: Ostapchuk, Tetyana
name: Petzelt, Jan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: SrTiO3 ceramics are investigated by piezoresponse force microscopy. Piezoelectric contrast is observed on polished surfaces in both vertical and lateral regimes and depends on the grain orientation varying in both sign (polarization direction) and amplitude. The observed contrast is attested to the surface piezoelectricity due to flexoelectric effect (strain gradient-induced polarization) caused by the surface relaxation. The estimated flexoelectric coefficient is approximately one order of magnitude smaller as compared to those recently measured in SrTiO3 single crystals. The observed enhancement of piezoresponse signal at the grain boundaries is explained by the dipole moments associated with inhomogeneous distribution of oxygen vacancies.
Deflated Hermitian Lanczos Methods for Multiple Right-Hand Sides
Creators: name: Abdel-Rehim, Abdou M.
name: Morgan, Ronald B.
name: Nicely, Dywayne
name: Wilcox, Walter
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: A deflated and restarted Lanczos algorithm to solve hermitian linear systems, and at the same time compute eigenvalues and eigenvectors for application to multiple right-hand sides, is described. For the first right-hand side, eigenvectors with small eigenvalues are computed while simultaneously solving the linear system. Two versions of this algorithm are given. The first is called Lan-DR and is based on conjugate gradient (CG) implementation of the Lanczos algorithm. This version will be optimal for the hermitian positive definite case. The second version is called MinRes-DR and is based on the minimum residual (MinRes) implementation of Lanczos algorithm. This version is optimal for indefinite hermitian systems where the CG algorithm is subject to instabilities. For additional right-hand sides, we project over the calculated eigenvectors to speed up convergence. The algorithms used for subsequent right-hand sides are called D-CG and D-MinRes respectively. After some introductory examples are given, we show tests for the case of Wilson fermions at kappa critical. A considerable speed up in the convergence is observed compared to unmodified CG and MinRes.
description: Presented at 26th International Symposium on Lattice Field Theory, Williamsburg, VA, USA, 14-19 Jul 2008