cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Three-dimensional Numerical Simulations of Magnetized Winds of Solar-Like Stars
Creators: name: Vidotto, A. A.
name: Opher, M.
name: Jatenco-Pereira, V.
name: Gombosi, T. I.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: By means of self-consistent 3D MHD numerical simulations, we analyze magnetized solar-like stellar winds and their dependence on the plasma-beta parameter. We adopt in our simulations a heating parameter described by gamma, which is responsible for the thermal acceleration of the wind. We analyze winds with polar magnetic field intensities ranging from 1 to 20G. We show that the wind structure presents characteristics that are similar to the solar coronal wind. The steady-state magnetic field topology for all cases is similar, presenting a configuration of helmet streamer-type, with zones of closed field lines and open field lines coexisting. Higher magnetic field intensities lead to faster and hotter winds. The increase of the field intensity generates a larger dead zone in the wind, i. e., the closed loops that inhibit matter to escape from latitudes lower than ~45 degrees extend farther away from the star. The Lorentz force leads naturally to a latitude-dependent wind. We show that by increasing the density and maintaining B0=20G, the system recover back to slower and cooler winds. For a fixed gamma, we show that the key parameter in determining the wind velocity profile is the beta-parameter at the coronal base. Therefore, there is a group of magnetized flows that would present the same terminal velocity despite of its thermal and magnetic energy densities, as long as the plasma-beta parameter is the same. This degeneracy, however, can be removed if we compare other physical parameters of the wind, such as the mass-loss rate. We analyze the influence of gamma in our results and we show that it is also important in determining the wind structure. (Abridged)
description: Accepted for publication in the Astrophysical Journal, 12 pages, 12 figures, emulateapj. High-resolution version available at http://www.astro.iag.usp.br/~aline/papers/2009apj-solar-like.pdf
title: Transcriptomics provides a robust framework for the relationships of the major clades of cladobranch sea slugs (Mollusca, Gastropoda, Heterobranchia), but fails to resolve the position of the enigmatic genus Embletonia
Creators: name: Karmeinski, Dario
name: Meusemann, Karen
name: Goodheart, Jessica A.
name: Schroedl, Michael
name: Martynov, Alexander
name: Korshunova, Tatiana
name: Wägele, Heike
name: Donath, Alexander
Publisher: name: BMC Ecology and Evolution
Year: 2021

description: Included in this archive are the five alternative assemblies for each sample that has been sequenced in the frame of this study (FASTA format). Note that the best selected assembly has been deposited at the NCBI TSA database. Pseudobornella orientalis (HW08) has been removed from the NCBI TSA database due to exceptionally low sequence quality. Its alternative assemblies are therefore also not part of this archive.
Radio Weak Gravitational Lensing with VLA and MERLIN
Creators: name: Patel, P.
name: Bacon, D. J.
name: Beswick, R. J.
name: Muxlow, T. W. B.
name: Hoyle, B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We carry out an exploratory weak gravitational lensing analysis on a combined VLA and MERLIN radio data set: a deep (3.3 micro-Jy beam^-1 rms noise) 1.4 GHz image of the Hubble Deep Field North. We measure the shear estimator distribution at this radio sensitivity for the first time, finding a similar distribution to that of optical shear estimators for HST ACS data in this field. We examine the residual systematics in shear estimation for the radio data, and give cosmological constraints from radio-optical shear cross-correlation functions. We emphasize the utility of cross-correlating shear estimators from radio and optical data in order to reduce the impact of systematics. Unexpectedly we find no evidence of correlation between optical and radio intrinsic ellipticities of matched objects; this result improves the properties of optical-radio lensing cross-correlations. We explore the ellipticity distribution of the radio counterparts to optical sources statistically, confirming the lack of correlation; as a result we suggest a connected statistical approach to radio shear measurements.
description: 16 pages with 19 figures, accepted for publication in MNRAS; Minor corrections to section 6.3; 2 references added
MPEC 2023-K193 : 2022 LK16
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
РАЗВИТИЕ ЭМОЦИОНАЛЬНОГО ИНТЕЛЛЕКТА У ДОШКОЛЬНИКОВ
Creators: name: Казимова, Лейла
Publisher: name: Zenodo
Year: 2023

description: в этом тезисе приведены эффективные методы улучшения эмоционального интеллекта у дошкольников, включая игры, распознавание эмоций по мимике, обсуждение чувств и эмоций, чтение книг о чувствах, моделирование ситуаций и обучение стратегиям управления эмоциями, таким как дыхательные упражнения или ролевые игры. игры. Также указано, что важно научить детей сопереживанию и уважению к чувствам других людей.
Revisiting the optical depth of spiral galaxies using the Tully-Fisher B relation
Creators: name: Kankare, E.
name: Hanski, M.
name: Theureau, G.
name: Teerikorpi, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims. We attempt to determine the optical depth of spiral galaxy disks by a statistical study of new Tully-Fisher data from the ongoing KLUN+ survey, and to clarify the difference between the true and apparent behavior of optical depth. Methods. By utilizing so-called normalized distances, a subsample of the data is identified to be as free from selection effects as possible. For these galaxies, a set of apparent quantities are calculated for face-on positions using the Tully-Fisher diameter and magnitude relations. These values are compared with direct observations to determine the mean value of the parameter C describing the optical depth. Results. The present study suggests that spiral galaxy disks are relatively optically thin tauB = 0.1, at least in the outermost regions, while they appear in general to be optically thick tauB > 1 when the apparent magnitude and average surface brightness are studied statistically.
description: 9 pages, 13 figures, accepted for publication in Astronomy & Astrophysics
Different types of ultraluminous X-ray sources in NGC 4631
Creators: name: Soria, Roberto
name: Ghosh, Kajal
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have re-examined the most luminous X-ray sources in the starburst galaxy NGC 4631, using XMM-Newton, Chandra and ROSAT data. The most interesting source is a highly variable supersoft ULX. We suggest that its bolometric luminosity ~ a few 10^{39} erg/s in the high/supersoft state: this is an order of magnitude lower than estimated in previous studies, thus reducing the need for extreme or exotic scenarios. Moreover, we find that this source was in a non-canonical low/soft (kT ~ 0.1-0.3 keV) state during the Chandra observation. By comparing the high and low state, we argue that the spectral properties may not be consistent with the expected behaviour of an accreting intermediate-mass black hole. We suggest that recurrent super-Eddington outbursts with photospheric expansion from a massive white dwarf (M_{wd} >~ 1.3 M_{sun}), powered by non-steady nuclear burning, may be a viable possibility, in alternative to the previously proposed scenario of a super-Eddington outflow from an accreting stellar-mass black hole. The long-term average accretion rate required for nuclear burning to power such white-dwarf outbursts in this source and perhaps in other supersoft ULXs is ~ 5-10 x 10^{-6} M_{sun}/yr: this is comparable to the thermal-timescale mass transfer rate invoked to explain the most luminous hard-spectrum ULXs (powered by black hole accretion). The other four most luminous X-ray sources in NGC 4631 (three of which can be classified as ULXs) appear to be typical accreting black holes, in four different spectral states: high/soft, convex-spectrum, power-law with soft excess, and simple power-law. None of them requires masses >~ 50 M_{sun}.
description: 12 pages, accepted by ApJ
A versatile dual spot laser scanning confocal microscopy system for advanced fluorescence correlation spectroscopy analysis in living cell
Creators: name: Ferrand, P.
name: Pianta, M.
name: Kress, A.
name: Aillaud, A.
name: Rigneault, H.
name: Marguet, D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A fluorescence correlation spectroscopy (FCS) system based on two independent measurement volumes is presented. The optical setup and data acquisition hardware are detailed, as well as a complete protocol to control the location, size and shape of the measurement volumes. A method that allows to monitor independently the excitation and collection efficiency distribution is proposed. Finally, a few examples of measurements that exploit the two spots in static and/or scanning schemes, are reported.
description: Accepted for publication in Review of Scientific Instrument
Espectroscopia Mesónica Moderna: o Papel Fundamental da Unitariedade
Creators: name: van Beveren, Eef
name: Rupp, George
Publisher: name: arXiv
Year: 2021
Subjects: subject: Popular Physics (physics.pop-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The importance of implementing unitarity constraints in meson spectroscopy is very briefly outlined for Portuguese students of engineering sciences and therefore non-experts in the field. After explaining the profound differences between meson spectroscopy and atomic spectroscopy, attention is paid to the shortcomings of standard Breit-Wigner parametrisations in the case of broad and/or overlapping resonances. Finally, the manifestly unitary Resonance-Spectrum-Expansion model, which lies at the heart of a recent invited review paper by the present authors, is graphically presented, together with a simple yet typical application to the long-controversial $K_0^\star(700)$ resonance.
description: in Portuguese. Invited paper for the first new edition (no. 504) of the students journal "T\'{e}cnica" published on 3 November 2021 by the "Associa\c{c}\~{a}o dos Estudantes do Instituto Superior T\'{e}cnico" of IST in Lisbon, Portugal. Article is in Portuguese language, with an English abstract; 4 pages, 5 figures. Link to published version: https://www.paperturn-view.com/?pid=MTk197448&p=25&v=1.1
Hadronic fluctuations and correlations at nonzero chemical potential
Creators: name: Schmidt, Christian
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present a lattice study of fluctuations and correlations among the conserved charges baryon number and strangeness in (2+1)-flavor QCD. The lattice calculations are based on a Taylor expansion of the pressure. Results are presented at zero and nonzero density on lattices with four and six time slices, corresponding to a lattice spacing of $a\approx 0.25$ fm and $a\approx 0.16$ fm, respectively. The quark masses are almost physical, i.e. the light quark mass has been chosen to one tenth of the physical strange quark mass while the strange quark mass has been set to its physical value. We find that all analyzed fluctuations and correlations develop a peak at nonzero density, when they are treated in an expansion up to sixth order. Especially below the critical temperature ($T_c$) fluctuations and correlations increase drastically, whereas above $T_c$ they are rather unaffected.
description: Contribution to the 5th International Workshop on Critical Point and Onset of Deconfinement, June 8-1, 2009 (CPOD 2009), Brookhaven National Laboratory, Long Island, New York, USA; 10 pages, 5 figures
Linear Response and the Thomas-Fermi Approximation in Undoped Graphene
Creators: name: Brey, L.
name: Fertig, H. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We analyze the range of validity of Thomas Fermi theory for describing charge density modulations induced by external potentials in neutral graphene. We compare exact results obtained from a tight-binding calculation with those of linear response theory and the Thomas Fermi approximation. For experimentally interesting ranges of size and density amplitudes (electron densities less than $\sim 10 ^{11} cm ^{-2}$, and spatial length scales below $\sim 20 nm$), linear response is significantly more accurate than Thomas Fermi theory.
title: Enfermedad por depósito de cristales de pirofosfato cálcico: lo que el radiólogo debe saber
Creators: name: Morcillo Carratalá, Rafael
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Pathology
subject: Inflammation
subject: Arthritides
subject: Diagnostic procedure
subject: Localisation
subject: Complications
subject: CT
subject: MR
subject: Conventional radiography
subject: Musculoskeletal system
subject: Musculoskeletal bone
subject: Musculoskeletal joint

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
1- Ilustrar a través de diferentes técnicas de imagen (radiología convencional,
tomografía computarizada y resonancia magnética) el espectro de manifestaciones radiológicas que presenta la enfermedad por depósito de cristales de pirofosfato...
title: Estudio por imagen de la patología del diafragma.
Creators: name: Hermosin Pena, Antonio
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Thorax
subject: Abdomen
subject: CT
subject: MR
subject: Ultrasound

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Revisar las características anatómicas del diafragma,
y presentar las diferentes patologías que lo afectan. Mostrar las distintas técnicas de imagen útiles para la valoración correcta de la patología diafragmática y las indicaciones de cada...
Particle distribution tail and related energy formula
Creators: name: Combescot, R.
name: Alzetto, F.
name: Leyronas, X.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a simple derivation of the energy formula found by Tan, relative to the single channel hamiltonian relevant for ultracold Fermi gases. This derivation is generalized to particles with different masses, to arbitrary mixtures, and to two-dimensional space. We show how, in a field theoretical approach, the $1/k^4$ tail in the momentum distribution and the energy formula arise in a natural way. As a specific example, we consider quantitative calculations of the energy, from different formulas within the ladder diagrams approximation in the normal state. The comparison of the results provides an indication on the quality of the approximation.
description: 15 pages, 1 figure
$CPT$ Violating Electrodynamics and Chern-Simons Modified Gravity
Creators: name: Li, Mingzhe
name: Cai, Yi-Fu
name: Wang, Xiulian
name: Zhang, Xinmin
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The electrodynamics with a Chern-Simons term $p_μA_ν\widetilde{F}^{μν}$ violates Lorentz and $CPT$ symmetries with a non-vanishing $p_μ$. For a fixed vector $p_μ$, in this paper we point out that the energy-momentum tensor of this theory coupled to the gravity minimally is symmetric but not divergence free, which consequently makes the gravitational field equation inconsistent. To preserve the consistency, we introduce a Chern-Simons term in the gravity sector with the coefficient determined by the Lorentz and $CPT$ violating term in the electromagnetic field. Further we study the phenomenologies of the model on the cosmic microwave background radiation and the relic gravitational waves.
description: 11 pages, 1 figure, the version to appear in Physics Letters B
Quintom dark energy models with nearly flat potentials
Creators: name: Setare, M. R.
name: Saridakis, E. N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine quintom dark energy models, produced by the combined consideration of a canonical and a phantom field, with nearly flat potentials and dark energy equation-of-state parameter $w_{DE}$ close to -1. We find that all such models converge to a single expression for $w_{DE}(z)$, depending only on the initial field values and their derivatives. We show that this quintom paradigm allows for a description of the transition through -1 in the near cosmological past. In addition, we provide the necessary conditions for the determination of the direction of the -1-crossing.
description: 7 pages, 3 figures, version to appear in Phys. Rev. D
MPEC 2023-K194 : 2021 LU43
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Orbitally relieved magnetic frustration in NaVO2
Creators: name: Jia, Ting
name: Zhang, Guoren
name: Zeng, Zhi
name: Lin, H. Q.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetic properties of NaVO2 are investigated using full-potential linearized augmented plane wave method. We perform calculations for three structures. For the rhombohedral structure at 100 K, the t2g orbitals of V ions are split into upper a1g and lower e'g orbitals by a trigonal distortion of compression. For the monoclinic structure at 91.5 K, the system behaves like a frustrated spin lattice with spatially anisotropic exchange interactions. For another monoclinic structure at 20 K, the magnetic frustration is relieved by a lattice distortion which is driven by a certain orbital ordering, and the long-range magnetic ordering is thus formed. Moreover, the small magnetic moment originates from the compensation oforbital moment for the spin moment.
description: Accepted by PRB
Delivering Effective Digital Game-Based Learning: A Comparative Study Between Computer and Mobile as the Learning Framework for Preschoolers
Creators: name: Garcia, Manuel
Publisher: name: figshare
Year: 2021
Subjects: subject: 130102 Early Childhood Education (excl. Maori)
subject: FOS: Educational sciences

description: Learning happens everywhere but where and how you learn make all the difference. With increasingly ubiquitous technology in schools, it is imperative that educational leaders must select the right device for teaching and learning. The right learning framework suitable for the student's grade level will activate their new pedagogical priorities and create their own artifacts of learning. This paper presents a comparative analysis between computer game-based learning and mobile game-based learning as the learning framework in Preschool Education in the Philippine setting when delivering effective digital game-based learning. A technical comparison was made to ascertain the implications of the selected learning medium in DGBL. The study was then evaluated based on the device assessment of the pupils covering various aspects such as availability, technical adequacy, usability, preference, enjoyment, and game repository. Another evaluation was made with regards to the learning criteria of the pupils when using a device based on the following criteria: learning objective, learning experience, learning engagement, skill scaffolding, and game storyline. Research data were collected within a city both in public and private schools using stratified random sampling. The researchers determined if there is a significant difference between computer and mobile as the learning medium of DGBL to provide a basis to educational leaders when choosing between CGBL and MGBL.
Momentum Space Regularizations and the Indeterminacy in the Schwinger Model
Creators: name: Morais, C. W.
name: Mota, A. L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We revisited the problem of the presence of finite indeterminacies that appear in the calculations of a Quantum Field Theory. We investigate the occurrence of undetermined mathematical quantities in the evaluation of the Schwinger model in several regularization scenarios. We show that the undetermined character of the divergent part of the vacuum polarization tensor of the model, introduced as an {\it ansatz} in previous works, can be obtained mathematically if one introduces a set of two parameters in the evaluation of these quantities. The formal mathematical properties of this tensor and their violations are discussed. The analysis is carried out in both analytical and sharp cutoff regularization procedures. We also show how the Pauli Villars regularization scheme eliminates the indeterminacy, giving a gauge invariant result in the vector Schwinger model.
description: 10 pages, no figures
Observation of excited states in a graphene double quantum dot
Creators: name: Molitor, F.
name: Knowles, H.
name: Dröscher, S.
name: Gasser, U.
name: Choi, T.
name: Roulleau, P.
name: Güttinger, J.
name: Jacobsen, A.
name: Stampfer, C.
name: Ensslin, K.
name: Ihn, T.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study a graphene double quantum dot in different coupling regimes. Despite the strong capacitive coupling between the dots, the tunnel coupling is below the experimental resolution. We observe additional structures inside the finite-bias triangles, part of which can be attributed to electronic excited dot states, while others are probably due to modulations of the transmission of the tunnel barriers connecting the system to source and drain leads.
title: Σχεδίαση και κατασκευή μηχανολογικών τεμαχίων με τη βοήθεια λογισμικού CAD/CAM
title: Design and machining of mechanical parts by means of CAD/CAM software
Creators: name: Μαραζιωτη Μαρια
name: Μπαχταλια Αναστασια
Publisher: name: Technical University of Crete
Year: 2021

description: Στην παρούσα διπλωματική εργασία θα γίνει σχεδιασμός πολύπλοκων τεμαχίων μέσω του λογισμικού CAD/CAM NX. Στη συνέχεια, θα πραγματοποιηθεί ο προγραμματισμός των εργαλειομηχανών ψηφιακής καθοδήγησης SINUMERIK 840D του κέντρου τόρνευσης CTX310 και του κέντρου κατεργασίας DMU50. Τέλος, θα κατασκευαστούν τα τεμάχια που προγραμματίστηκαν ανωτέρω.
title: Neurofibromatosis tipo 1 en niños. Diagnóstico y complicaciones.
Creators: name: Serrano Tamayo, Elena
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Paediatric
subject: Neuroradiology brain
subject: Musculoskeletal bone

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Describir e ilustrar los hallazgos radiológicos típicos de la neurofibromatosis tipo 1 (NF1) en la infancia y algunas complicaciones poco...
A Brief Introduction to Loop Quantum Cosmology
Creators: name: Marugan, Guillermo A. Mena
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In recent years, Loop Quantum Gravity has emerged as a solid candidate for a nonperturbative quantum theory of General Relativity. It is a background independent theory based on a description of the gravitational field in terms of holonomies and fluxes. In order to discuss its physical implications, a lot of attention has been paid to the application of the quantization techniques of Loop Quantum Gravity to symmetry reduced models with cosmological solutions, a line of research that has been called Loop Quantum Cosmology. We summarize its fundamentals and the main differences with respect to the more conventional quantization approaches employed in cosmology until now. In addition, we comment on the most important results that have been obtained in Loop Quantum Cosmology by analyzing simple homogeneous and isotropic models. These results include the resolution of the classical big-bang singularity, which is replaced by a quantum bounce.
description: 15 pages, published in AIP Conference Proceedings, Volume 1130, Geometry and Physics: XVII International Fall Workshop on Geometry and Physics
Identification of Potential Weak Target Radio Quasars for ASTRO-G In-Beam Phase-Referencing
Creators: name: Frey, S.
name: Gabanyi, K. E.
name: Asaki, Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We apply an efficient selection method to identify potential weak Very Long Baseline Interferometry (VLBI) target quasars simply using optical (SDSS) and low-resolution radio (FIRST) catalogue data. Our search is restricted to within 12" from known compact radio sources that are detectable as phase-reference calibrators for ASTRO-G at 8.4 GHz frequency. These calibrators have estimated correlated flux density >20 mJy on the longest ground-space VLBI baselines. The search radius corresponds to the primary beam size of the ASTRO-G antenna. We show that ~20 quasars with at least mJy-level expected flux density can be pre-selected as potential in-beam phase-reference targets for ASTRO-G at 8.4 GHz frequency. Most of them have never been imaged with VLBI. The sample of these dominantly weak sources offers a good opportunity to study their radio structures with unprecedented angular resolution provided by Space VLBI. The method of in-beam phase-referencing is independent from the ability of the orbiting radio telescope to do rapid position-switching manoeuvres between the calibrators and the nearby reference sources, and less sensitive to the satellite orbit determination uncertainties.
description: 5 pages, accepted for the Publ. Astron. Soc. Japan (Vol. 61, No. 1, Feb 2009)
Fondos editoriales como estrategia para fomentar la investigación académica y científica
Creators: name: Santisteban-Llaguento, Carmen
Publisher: name: Zenodo
Year: 2023
Subjects: subject: Universidades
subject: Universities
subject: Editorial universitaria
subject: University publisher
subject: Investigación
subject: Research
subject: Perú
subject: http://vocabularies.unesco.org/thesaurus/concept4207

description: Exposición sobre el Modelo de Renovación de Licencia Institucional de la SUNEDU.
 Jornadas de Gestión de la Investigación 2023 - JGI2023.
 25 - 26 de mayo 2023.
description: Jornadas de Gestión de la Investigación 2023 - JGI2023.
Next-to-leading order QCD corrections to hadron+jet production in pp collisions at RHIC
Creators: name: de Florian, Daniel
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the next-to-leading order QCD corrections to the spin-independent and spin-dependent cross-sections for the production of a single-hadron accompanied by an opposite jet in hadronic collisions. This process is being studied experimentally at RHIC, providing a new tool to unveil the polarized gluon distribution Delta g. We perform a detailed analysis of the phenomenological impact of the observable at NLO accuracy and show that the preliminary data by the STAR collaboration confirms the idea of a small gluon polarization in the 0.05
description: 16 pages, 11 Figures included. Minor typos corrected
Formation of massive planets in binary star systems
Creators: name: Kley, Willy
Publisher: name: arXiv
Year: 2009
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: As of today over 40 planetary systems have been discovered in binary star systems. In all cases the configuration appears to be circumstellar, where the planets orbit around one of the stars, the secondary acting as a perturber. The formation of planets in binary star systems is more difficult than around single stars due to the gravitational action of the companion on the dynamics of the protoplanetary disk. In this contribution we first briefly present the relevant observational evidence for planets in binary systems. Then the dynamical influence that a secondary companion has on a circumstellar disk will be analyzed through fully hydrodynamical simulations. We demonstrate that the disk becomes eccentric and shows a coherent precession around the primary star. Finally, fully hydrodynamical simulations of evolving protoplanets embedded in disks in binary star systems are presented. We investigate how the orbital evolution of protoplanetary embryos and their mass growth from cores to massive planets might be affected in this very dynamical environment. We consider, in particular, the planet orbiting the primary in the system Gamma Cephei.
description: To appear in Proceedings: Extrasolar Planets in Multi-body Systems: Theory and Observations Eds. K. Gozdziewski, A. Niedzielski and J. Schneider
Forecasting Dropout of Undergraduates Pibulsongkram Rajabhat University with Data Mining Technique
Creators: name: Chutiphon Srisawat
Publisher: name: Faculty of Informatics, Mahasarakham University
Year: 2023
Subjects: Fall off
Decision Tree
Naïve Bayes
Rule Induction

description: Journal of Applied Informatics and Technology, 5, 1, 1-17
Promoting Environmental Awareness Among Preschoolers in Singapore
Creators: name: Laroza, Coro May
Publisher: name: Zenodo
Year: 2023
Subjects: Preschool, Environmental Awareness, Singapore, Sustainability, Early Years

description: The study was conducted for a period of one month among preschool educators in Singapore. Fifteen participants both from the public and private school sector were interviewed using a questionnaire that was formulated by the researcher. The study aimed to find out the views and opinions of Singapore preschool educators when it comes to teaching environmental education to children in their early years.Results show that all educators agree that it is important for children to be educated about their environment as early as preschool. However, there are some concerns and issues that need to be addressed in order to make sure that the young learners would benefit and environmental education would be taught effectively.
Gamma-ray orbital modulation of the transitioning millisecond pulsar binary XSS J12270-4859
Creators: name: An, Hongjun
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on gamma-ray orbital modulation of the transitioning millisecond pulsar binary XSS J12270-4859 detected in the Fermi Large Area Telescope (LAT) data. We use long-term optical data taken with the XMM-Newton Optical Monitor and the Swift UltraViolet Optical Telescope to inspect radio timing solutions that are limited to relatively short time intervals, and find that extrapolation of the solutions aligns well the phasing of the optical data over 15 years. The Fermi-LAT data folded on the timing solutions exhibit significant modulation (p = 5x10^-6) with a gamma-ray minimum at the inferior conjunction of the pulsar. Intriguingly, the source seems to show similar modulation in both the low-mass X-ray binary (LMXB) and the millisecond pulsar (MSP) states, implying that mechanisms for gamma-ray emission in the two states are similar. We discuss these findings and their implications using an intra-binary shock scenario.
description: 8 pages, 3 figures. Accepted for publication in ApJ
The space of Kleinian punctured torus groups is not locally connected
Creators: name: Bromberg, K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Geometric Topology (math.GT)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 30F40; 57M50

description: We show that the space of Kleinian punctured torus groups is not locally connected.
title: Biopsia/exéresis asistida por vacío con guía ecográfica de lesiones benignas de mama
Creators: name: García Hernández, María Jose
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Interventional non-vascular
subject: Breast
subject: Ultrasound
subject: Vacuum assisted biopsy
subject: Pathology

description: Objetivos
Material y método
Resultados
Conclusiones
Bibliografía
description: Objetivos:
El objetivo de este trabajo ha sido analizar y describir nuestra experiencia inicial con la extirpación percutánea guiada por ecografía de lesiones benignas de mama mediante un sistema de aguja gruesa asistida por...
title: De la sospecha clínica a la imagen en el colangiocarcinoma. Experiencia en un hospital comarcal.
Creators: name: Fernandez Muñoz, Israel
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Abdomen
subject: MR
subject: CT

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
El colangiocarcinoma es el segundo tumor hepático primario más frecuente.
Puede ser intra o extrahepático y se da con mayor frecuencia en pacientes de 50-70 años.
Una vez realizada la sospecha clínica,
exponemos las manifestaciones...
title: Tratamiento endovascular en 63 pacientes con estenosis en la arteria del injerto renal: resultados a medio-largo plazo.
Creators: name: Marini Diaz, Milagros
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Interventional vascular
subject: Kidney
subject: Catheter arteriography
subject: Ultrasound-Colour Doppler
subject: Angioplasty
subject: Stents
subject: Grafts
subject: Hypertension
subject: Transplantation

description: Objetivos
Material y método
Resultados
Conclusiones
Bibliografía
description: Objetivos:
Evaluar retrospectivamente los procedimientos técnicos,
la tasa de éxito clínico y los resultados a medio y largo plazo del tratamiento endovascular de la estenosis de la arteria del injerto renal o en la arteria ilíaca,
de pacientes después de...
Inovações para uma aquacultura mais sustentável - GAIN - Green Aquaculture INtensification
Creators: name: Fragoso, Bruno
Publisher: name: Zenodo
Year: 2021
Subjects: Aquaculture Precision Novel Feeds Circularity Side-Stream Valorisation Policy Nutrient Trading

description: Presentation at the Portuguese Aquaculture Producers Seminar, regarding the work developed within GAIN H2020 project. Outcomes of potential interest to the Portuguese Aquaculture Producers.
description: This work includes input from several partners within the GAIN H2020 project.
Microscopic origins and stability of the ferromagnetism in Co$_3$Sn$_2$S$_2$
Creators: name: Solovyev, I. V.
name: Nikolaev, S. A.
name: Ushakov, A. V.
name: Irkhin, V. Yu.
name: Tanaka, A.
name: Streltsov, S. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Based on the density functional theory, we examine the origin of ferromagnetism in the Weyl semimetal Co$_3$Sn$_2$S$_2$ using different types of response theories. We argue that the magnetism of Co$_3$Sn$_2$S$_2$ has a dual nature and bears certain aspects of both itineracy and localization. On the one hand, the magnetism is soft, where the local magnetic moments strongly depend on temperature and the angles formed by these moments at different Co sites of the kagome lattice, as expected for itinerant magnets. On the other hand, the picture of localized spins still remains adequate for the description of the local stability of the ferromagnetic (FM) order with respect to the transversal spin fluctuations. For the latter purposes, we employ two approaches, which provide quite different pictures for interatomic exchange interactions: the regular magnetic force theorem and a formally exact theory based on the calculation of the inverse response function. The exact theory predicts Co$_3$Sn$_2$S$_2$ to be a three-dimensional ferromagnet with the strongest interaction operating between next-nearest neighbors in the adjacent kagome planes. The ligand states are found to play a very important role by additionally stabilizing the FM order. When the local moments decrease, the interplane interactions sharply decrease, first causing the FM order to become quasi-two-dimensional, and then making it unstable with respect to the spin-spiral order propagating perpendicular to the kagome plane. The latter instability is partly contributed by the states at the Fermi surface and may be relevant to the magnetic behavior of Co$_3$Sn$_2$S$_2$ near the Curie temperature. Peculiarities of the half-metallic ferromagnetism in Co$_3$Sn$_2$S$_2$ are also discussed.
Radiation and Polarization Signatures from Magnetic Reconnection in Relativistic Jets--II. Connection with $γ$-rays
Creators: name: Zhang, Haocheng
name: Li, Xiaocan
name: Giannios, Dimitrios
name: Guo, Fan
name: Thiersen, Hannes
name: Böttcher, Markus
name: Lewis, Tiffany
name: Venters, Tonia
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: It is commonly believed that blazar jets are relativistic magnetized plasma outflows from supermassive black holes. One key question is how the jets dissipate magnetic energy to accelerate particles and drive powerful multi-wavelength flares. Relativistic magnetic reconnection has been proposed as the primary plasma physical process in the blazar emission region. Recent numerical simulations have shown strong acceleration of nonthermal particles that may lead to multi-wavelength flares. Nevertheless, previous works have not directly evaluated $γ$-ray signatures from first-principle simulations. In this paper, we employ combined particle-in-cell and polarized radiation transfer simulations to study multi-wavelength radiation and optical polarization signatures under the leptonic scenario from relativistic magnetic reconnection. We find harder-when-brighter trends in optical and {\it Fermi-LAT} $γ$-ray bands as well as closely correlated optical and $γ$-ray flares. The optical polarization angle swings are also accompanied by $γ$-ray flares with trivial time delays. Intriguingly, we find highly variable synchrotron self Compton signatures due to inhomogeneous particle distributions during plasmoid mergers. This feature may result in fast $γ$-ray flares or orphan $γ$-ray flares under the leptonic scenario, complementary to the frequently considered mini-jet scenario. It may also infer neutrino emission with low secondary synchrotron flux under the hadronic scenario, if plasmoid mergers can accelerate protons to very high energy.
description: 16 pages, 12 figures. Accepted by ApJ
Polar phonons in some compressively stressed epitaxial and polycrystalline SrTiO3 thin films
Creators: name: Nuzhnyy, D.
name: Petzelt, J.
name: Kamba, S.
name: Yamada, T.
name: Tyunina, M.
name: Tagantsev, A. K.
name: Levoska, J.
name: Setter, N.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Several SrTiO3 (STO) thin films without electrodes processed by pulsed laser deposition, of thicknesses down to 40 nm, were studied using infrared transmission and reflection spectroscopy. The complex dielectric responses of polar phonon modes, particularly ferroelectric soft mode, in the films were determined quantitatively. The compressed epitaxial STO films on (100) La0.18Sr0.82Al0.59-Ta0.41O3 substrates (strain 0.9%) show strongly stiffened phonon responses, whereas the soft mode in polycrystalline film on (0001) sapphire substrate shows a strong broadening due to grain boundaries and/or other inhomogeneities and defects. The stiffened soft mode is responsible for a much lower static permittivity in the plane of the compressed film than in the bulk samples.
description: 11 pages
Spontaneous Imbibition Dynamics of an n-Alkane in Nanopores: Evidence of Meniscus Freezing and Monolayer Sticking
Creators: name: Gruener, Simon
name: Huber, Patrick
Publisher: name: arXiv
Year: 2009
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Capillary filling dynamics of liquid n-tetracosane (n-C24H50) in a network of cylindrical pores with 7 and 10 nm mean diameter in monolithic silica glass (Vycor) exhibit an abrupt temperature-slope change at Ts=54 deg C, ~4 deg C above bulk and ~16 deg C, 8 deg C, respectively, above pore freezing. It can be traced to a sudden inversion of the surface tension's T slope, and thus to a decrease in surface entropy at the advancing pore menisci, characteristic of the formation of a single solid monolayer of rectified molecules, known as surface freezing from macroscopic, quiescent tetracosane melts. The imbibition speeds, that are the squared prefactors of the observed square-root-of-time Lucas-Washburn invasion kinetics, indicate a conserved bulk fluidity and capillarity of the nanopore-confined liquid, if we assume a flat lying, sticky hydrocarbon backbone monolayer at the silica walls.
description: 4 pages, 2 figures
A Survey on Epistemic (Model) Uncertainty in Supervised Learning: Recent Advances and Applications
Creators: name: Zhou, Xinlei
name: Liu, Han
name: Pourpanah, Farhad
name: Zeng, Tieyong
name: Wang, Xizhao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Quantifying the uncertainty of supervised learning models plays an important role in making more reliable predictions. Epistemic uncertainty, which usually is due to insufficient knowledge about the model, can be reduced by collecting more data or refining the learning models. Over the last few years, scholars have proposed many epistemic uncertainty handling techniques which can be roughly grouped into two categories, i.e., Bayesian and ensemble. This paper provides a comprehensive review of epistemic uncertainty learning techniques in supervised learning over the last five years. As such, we, first, decompose the epistemic uncertainty into bias and variance terms. Then, a hierarchical categorization of epistemic uncertainty learning techniques along with their representative models is introduced. In addition, several applications such as computer vision (CV) and natural language processing (NLP) are presented, followed by a discussion on research gaps and possible future research directions.
description: 45pages, 4 figures
Collagenase and protease activity in Bacteroides melaninogenicus
Creators: name: Gisslow, Mary Therese
Publisher: name: University of British Columbia
Year: 2010

description: A rapid sensitive collagenase assay has been developed using ¹⁴C-acetylated collagen as the substrate. Acid-soluble calfskin collagen was labelled with acetic-1-¹⁴C-anhydride at pH 8. The radioactively labelled collagen remained susceptible to Clostridium histolyticum collagenase but resistant to nonspecific proteolysis indicating that denaturation of the collagen had not occurred as a result of the acetylation procedure. The rate of release of ¹⁴C from labelled collagen by C. histolyticum collagenase was 14 proportional to enzyme and substrate concentrations. The results of the ¹⁴C assay correlated with those of other collagenase assays tested. Collagenolytic activity of Bacteroides melaninogenicus was examined both in vitro and the guinea pig model system using known collagenase-producing strains and recent isolates. In contrast to the reported results of previous workers, only two of the thirty B. melaninogenicus strains isolated were found to have collagenase activity. Collagenase was found in washed cells of positive strains of B. melaninogenicus as early as day one. No activity was ever observed in culture supernatants. Studies of material aspirated from guinea pigs infected with pathogenic B. melaninogenicus demonstrated the presence of collagenase in the infectious exudates. The enzyme was associated with the bacterial cells, was dependent on reducing conditions and was stimulated by a factor in filtered exudate. Partial characterization of cell-free protease activity in B. melaninogenicus has shown the protease to be dependent on reducing agents, requiring 5 x 10⁻³ M cysteine for activity. Other reducing agents were also effective in stimulating protease activity. The activity was stable at 4°C, resistant to autodigestion, and sensitive to EDTA at concentrations of 10⁻³ M and above. The pH optimum for activity against Azocoll was 8.0.
Quadratic fractional solitons
Creators: name: Zeng, Liangwei
name: Zhu, Yongle
name: Malomed, Boris A.
name: Mihalache, Dumitru
name: Wang, Qing
name: Long, Hu
name: Cai, Yi
name: Lu, Xiaowei
name: Li, Jingzhen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We introduce a system combining the quadratic self-attractive or composite quadratic-cubic nonlinearity, acting in the combination with the fractional diffraction, which is characterized by its Lévy index $α$. The model applies to a gas of quantum particles moving by Lévy flights, with the quadratic term representing the Lee-Huang-Yang correction to the mean-field interactions. A family of fundamental solitons is constructed in a numerical form, while the dependence of its norm on the chemical potential characteristic is obtained in an exact analytical form. The family of \textit{quasi-Townes solitons}, appearing in the limit case of $α=1/2$, is investigated by means of a variational approximation. A nonlinear lattice, represented by spatially periodical modulation of the quadratic term, is briefly addressed too. The consideration of the interplay of competing quadratic (attractive) and cubic (repulsive) terms with a lattice potential reveals families of single-, double-, and triple-peak gap solitons (GSs) in two finite bandgaps. The competing nonlinearity gives rise to alternating regions of stability and instability of the GS, the stability intervals shrinking with the increase of the number of peaks in the GS.
description: to be published in Chaos, Solitons and Fractals