cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Aerosols in Exoplanet Atmospheres
Creators: name: Gao, Peter
name: Wakeford, Hannah R.
name: Moran, Sarah E.
name: Parmentier, Vivien
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Observations of exoplanet atmospheres have shown that aerosols, like in the Solar System, are common across a variety of temperatures and planet types. The formation and distribution of these aerosols are inextricably intertwined with the composition and thermal structure of the atmosphere. At the same time, these aerosols also interfere with our probes of atmospheric composition and thermal structure, and thus a better understanding of aerosols lead to a better understanding of exoplanet atmospheres as a whole. Here we review the current state of knowledge of exoplanet aerosols as determined from observations, modeling, and laboratory experiments. Measurements of the transmission spectra, dayside emission, and phase curves of transiting exoplanets, as well as the emission spectrum and light curves of directly imaged exoplanets and brown dwarfs have shown that aerosols are distributed inhomogeneously in exoplanet atmospheres, with aerosol distributions varying significantly with planet equilibrium temperature and gravity. Parameterized and microphysical models predict that these aerosols are likely composed of oxidized minerals like silicates for the hottest exoplanets, while at lower temperatures the dominant aerosols may be composed of alkali salts and sulfides. Particles originating from photochemical processes are also likely at low temperatures, though their formation process is highly complex, as revealed by laboratory work. In the years to come, new ground- and space-based observatories will have the capability to assess the composition of exoplanet aerosols, while new modeling and laboratory efforts will improve upon our picture of aerosol formation and dynamics.
description: Invited review for JGR-Planets's Exoplanets: The Nexus of Astronomy and Geoscience special section. Accepted for publication. 75 pages, 12 figures, 1 table, 1 helluva year
Satoyama Agricultural Development Tool (SADT) for Collaborative Assessment of Hilltribe Communities in Chaing Mai: Case Studies of Mueang Ang, Nhong Lom and Pa Kea Noi
Creators: name: Devon, Ronald Dublin
name: Jarunee Pilumwong
name: Samamas Chaiwong
name: Thitima Jantakoson
name: Anchan Chompupoung
name: Tanaka, Noriyuki
Publisher: name: Environmental Research Institute Chulalongkorn University Press
Year: 2015
Subjects: Agriculture, sustainable development, Satoyama, Karen, Royal Project Foundation

description: 1, 37, Applied Environmental Research
The XMM-Newton serendipitous survey IV. The AXIS X-ray source counts and angular clustering
Creators: name: Carrera, F. J.
name: Ebrero, J.
name: Mateos, S.
name: Ceballos, M. T.
name: Corral, A.
name: Barcons, X.
name: Page, M. J.
name: Rosen, S. R.
name: Watson, M. G.
name: Tedds, J.
name: Della Ceca, R.
name: Maccacaro, T.
name: Brunner, H.
name: Freyberg, M.
name: Lamer, G.
name: Bauer, F. E.
name: Ueda, Y.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: AXIS (An XMM-Newton International Survey) is a survey of 36 high Galactic latitude XMM-Newton observations covering 4.8 deg2 and containing 1433 serendipitous X-ray sources detected with 5-sigma significance. We have studied the X-ray source counts in four energy bands soft (0.5-2 keV), hard (2-10 keV), XID (0.5-4.5 keV) and ultra-hard (4.5-7.5 keV). We have combined this survey with shallower and deeper surveys. Our source counts results are compatible with most previous samples in the soft, XID, ultra-hard and hard bands. The fractions of the XRB resolved in the surveys used in this work are 87%, 85%, 60% and 25% in the soft, hard, XID and ultra-hard bands, respectively. Extrapolation of our source counts to zero flux are not enough to saturate the XRB intensity. Only galaxies and/or absorbed AGN may be able contribute the remaining unresolved XRB intensity. Our results are compatible, within the errors, with recent revisions of the XRB intensity in the soft and hard bands. The maximum fractional contribution to the XRB comes from fluxes within about a decade of the break in the source counts (~1e-14 cgs), reaching ~50% of the total in the soft and hard bands. Using only AXIS sources, we have studied the angular correlation in those bands using a novel robust technique. Angular clustering (widely distributed over the sky and not confined to a few deep fields) is detected at 99-99.9% significance in the soft and XID bands, with no detection in the hard and ultra-hard band (probably due to the smaller number of sources). We cannot confirm the detection of significantly stronger clustering in the hard-spectrum hard sources. Medium depth surveys such as AXIS are essential to determine the evolution of the X-ray emission in the Universe below 10 keV.
description: 28 pages, 10 figures, A&A accepted
Searching for t-bar t Resonances at the Large Hadron Collider
Creators: name: Baur, U.
name: Orr, L. H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Many new physics models predict resonances with masses in the TeV range which decay into a pair of top quarks. With its large cross section, t-bar t production at the Large Hadron Collider (LHC) offers an excellent opportunity to search for such particles. We present a detailed study of the discovery potential of the CERN Large Hadron Collider for Kaluza-Klein (KK) excitations of the gluon in bulk Randall-Sundrum (RS) models in the t-bar t -> ell^+/- nu b-bar bq-bar q' (ell=e, mu) final state. We utilize final states with one or two tagged b-quarks, and two, three or four jets (including b-jets). Our calculations take into account the finite resolution of detectors, the energy loss due to b-quark decays, the expected reduced b-tagging efficiency at large t-bar t invariant masses, and include the background originating from Wb-bar b+jets, (Wb+W-bar b)+jets, W+jets, and single top + jets production. We derive semi-realistic 5 sigma discovery limits for nine different KK gluon scenarios, and compare them with those for KK gravitons, and a Z_H boson in the Littlest Higgs model. We also analyze the capabilities of the LHC experiments to differentiate between individual KK gluon models and measure the couplings of KK gluons to quarks. We find that, for the parameters and models chosen, KK gluons with masses up to about 4 TeV can be discovered at the LHC. The ability of the LHC to discriminate between different bulk RS models, and to measure the couplings of the KK gluons is found to be highly model dependent.
description: revtex3, 27 pages, 5 tables, 6 figures
Geodesic deviation equation in Brans-Dicke theory in arbitrary dimensions
Creators: name: Rasouli, S. M. M.
name: Shojai, F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: In this paper, we study the geodesic deviation equation (GDE) within the context of the Brans-Dicke (BD) theory in $D$ dimensions. Then, we restrict our attention to the GDE for the fundamental observers and null vector field past directed. Concerning the latter, in order to apply the retrieved GDE for the cosmological models as well as examining exact solutions, we study some cosmological models in general relativity (GR) and in the context of the BD theory. For the BD framework, we provide two appropriate settings for dynamical system, which can be considered as the most extended case scenarios with respect to those studied previously. Then, we investigate a few well-known BD cosmological models, for which we present the modified and corrected exact solutions. Moreover, we show that the retrieved formalism of the GDE can also be properly applicable for the modified BD theory (MBDT), whose matter and potential emerge from the geometry. For all of our herein cosmological models, we investigate the energy conditions and depict the behavior of the deviation vector and observer area distance. We demonstrate that why the MBDT can be considered as a more appropriate candidate to describe the universe in accordance with the observational data as well as from theoretical viewpoint.
description: 34 pages, 7 figures
Η αισθητική στην τέχνη του λόγου της εκκλησίας: αναφορά στο υμνολογικό έργο του Ιωάννη Δαμασκηνού
Creators: name: Mandrila, Gabriel
Publisher: name: Aristotle University of Thessaloniki
Year: 2006
Subjects: Αισθητική
Κάλλος
Υμνογραφία
Εκκλησιαστική μουσική
Βίος Ιωάννη Δαμασκηνού
Aesthetics
Beauty
Hymnography
Ecclesiastical music
The life of St. John Damascenus

description: Η εργασία αναφέρεται στο φιλοσοφικό υπόβαθρο του θεολογικού έργου του ιερού Μελωδού σε σύγκριση και σύνδεση πάντα με κάποιες αντιπροσωπευτικές απόψεις της αρχαιότητας και της νεοτέρας περιόδου. Αυτή η αντιπαράθεση ιδεών και αντιλήψεων πραγματοποιείται σε τέσσερα διαφορετικά κεφάλαια (που αποτελούν τα πρώτα δύο μέρη της) όπου αναπτύσσονται κατά σειρά οι έννοιες της Αισθητικής και του Ωραίου από την άποψη τόσο της αρχαίας ελληνικής και μοντέρνας σκέψης, όσο και από την προοπτική των μη υμνολογικών έργων του αγίου Ιωάννου του Δαμασκηνού. Η εκμετάλλευση των αισθητικών θεωριών της αρχαιότητας επιμένει κυρίως πάνω στις θεωρίες του Πλάτωνα και του Αριστοτέλη δεδομένου ότι η αξιοποίησή τους στο Βυζάντιο και εννοείται στο γραμματολογικό έργο του Αγίου Ιωάννου είναι "αισθητή" (ειδικά στο χώρο των φιλοσοφικών κατηγοριών και της συγγένειας πλατωνικής ιδέας και δαμασκήνειας εικόνας).
description: This dissertation treats the problems of Aesthetics from an orthodox theological and ecclesiastical perspective. There is not an approach of the perception and materiality, time and space, but of whole teaching of the Orthodox Church about the creaturality of universe and the possibility of deification of man. The Word-Logos of God is present in every word and the man, through the Word and through the every word, can reach the zenith of his existence. This is about a Theological Aesthetics and Ascetism which was for centuries in the use of the Orthodox Church as latreia and pray, sacred music and poetry, scil. hymnography. This art and techne gives the possibility of the restoration of the mankind and make possible the real beautification of the human person in a real cultural way. Nevertheless, in this context the very aesthetical object remains the holiness (see the case of biographical texts on st. John’s life).
Convergence of level sets in fractional Laplacian regularization
Creators: name: Iglesias, José A.
name: Mercier, Gwenael
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 35R11, 47A52, 68U10, 35B51

description: The use of the fractional Laplacian in image denoising and regularization of inverse problems has enjoyed a recent surge in popularity, since for discontinuous functions it can behave less aggressively than methods based on $H^1$ norms, while being linear and computable with fast spectral numerical methods. In this work, we examine denoising and linear inverse problems regularized with fractional Laplacian in the vanishing noise and regularization parameter regime. The clean data is assumed piecewise constant in the first case, and continuous and satisfying a source condition in the second. In these settings, we prove results of convergence of level set boundaries with respect to Hausdorff distance, and additionally convergence rates in the case of denoising and indicatrix clean data. The main technical tool for this purpose is a family of barriers constructed by Savin and Valdinoci for studying the fractional Allen-Cahn equation. To help put these fractional methods in context, comparisons with the total variation and classical Laplacian are provided throughout.
description: 33 pages, 1 figure. V2: Accepted version, minor changes and new title
ITALY ELT ARCHIVE. A historical archive of materials for English language teaching in Italy
Creators: name: Nava, Andrea
name: Pedrazzini, Luciana
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2019
Subjects: L-LIN/12 Lingua e traduzione - Lingua inglese

description: While great strides have been made in the past few decades in historical research into the teaching of several European languages to nonnative learners, historical-oriented research into English language teaching (ELT) is still in its infancy. Historical investigations have often tackled the more general issue of ELT approaches and theories. Fewer studies are, however, yet available about actual ELT practices in specific contexts. As a first step in the investigation of Italian ELT practices, a project has been launched at the University of Milan aiming at the creation of an archive (as both a physical repository and an online database) of ELT materials published in Italy in the 20th century. This article introduces the proposed archive (ITALY ELT ARCHIVE) against the background of the history of foreign language learning and teaching in Italy in the last hundred years and previous attempts at creating historical archives of language learning/teaching materials.
Non-linear analysis for transversely post-tensioned timber bridge
Creators: name: Cai, Shen
Publisher: name: University of British Columbia
Year: 2008

description: Timber bridges have been very important in North America due to an abundant resource of the material and the relatively unsophisticated requirement for equipment and skilled labour. The transversely post-tensioned laminating method can improve the loading distribution capacity of the timber bridge structure and elongate the bridge service life. To develop a method for its analysis it is necessary to consider the non-linear behaviour of between-beams friction in the bridge structure. A method and corresponding computer program (PTB) has been developed for the non-linear analysis for the transversely post-tensioned timber bridge. The finite strip element method is used in the analysis. Wheel loadings are idealized as patches with static uniformly distributed loadings. The beam to beam friction parameters were obtained from tests. The relative movements between beams, in three-directions, stresses and deformations of the structure are obtained by the PTB program. As an application, abridge with post-tensioned T-beams made of Parallam is considered.
Tracking Knowledge Propagation Across Wikipedia Languages
Creators: name: Valentim, Roldolfo
name: Comarela, Giovanni
name: Park, Souneil
name: Saez-Trumper, Diego
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: In this paper, we present a dataset of inter-language knowledge propagation in Wikipedia. Covering the entire 309 language editions and 33M articles, the dataset aims to track the full propagation history of Wikipedia concepts, and allow follow up research on building predictive models of them. For this purpose, we align all the Wikipedia articles in a language-agnostic manner according to the concept they cover, which results in 13M propagation instances. To the best of our knowledge, this dataset is the first to explore the full inter-language propagation at a large scale. Together with the dataset, a holistic overview of the propagation and key insights about the underlying structural factors are provided to aid future research. For example, we find that although long cascades are unusual, the propagation tends to continue further once it reaches more than four language editions. We also find that the size of language editions is associated with the speed of propagation. We believe the dataset not only contributes to the prior literature on Wikipedia growth but also enables new use cases such as edit recommendation for addressing knowledge gaps, detection of disinformation, and cultural relationship analysis.
The quantum mass gap of extremal black holes
Creators: name: Hod, Shahar
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using sophisticated string theory calculations, Maldacena and Susskind have intriguingly shown that near-extremal black holes are characterized by a {\it finite} mass gap above the corresponding zero-temperature (extremal) black-hole configuration. In the present compact paper we explicitly prove that the minimum energy gap ${\cal E}_{\text{gap}}=\hbar^2/M^3$, which characterizes the mass spectra of near-extremal charged Reissner-Nordström black holes, can be inferred from a simple semi-classical analysis.
description: 5 pages
Fluctuation-Induced Casimir Forces in Granular Fluids
Creators: name: Cattuto, C.
name: Brito, R.
name: Marconi, U. Marini Bettolo
name: Nori, F.
name: Soto, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We have numerically investigated the behavior of driven non-cohesive granular media and found that two fixed large intruder particles, immersed in a sea of small particles, experience, in addition to a short range depletion force, a long range repulsive force. The observed long range interaction is fluctuation-induced and we propose a mechanism similar to the Casimir effect that generates it: the hydrodynamic fluctuations are geometrically confined between the intruders, producing an unbalanced renormalized pressure. An estimation based on computing the possible Fourier modes explains the repulsive force and is in qualitative agreement with the simulations.
description: 4 pages, 3 figures. Accepted in Phys. Rev. Letters
Ποιότητα ζωής σε παιδιά με νευροϊνωμάτωση τύπου 1: συσχέτιση με κλινικοεργαστηριακές παραμέτρους
Creators: name: Βαρδαρινός, Αθανάσιος Β.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Οπτικά γλοιώματα
Μαθησιακές διαταραχές
Optic pathway tumors(gliomas)
Learning difficulties

description: Σκοπός της έρευνας είναι η εκτίμηση της ποιότητας ζωής των παιδιατρικών ασθενών με νευροϊνωμάτωση τύπου 1 και η ανάδειξη των παραμέτρων της νόσου με τη μεγαλύτερη επίπτωση. Συμμετείχαν 43 ασθενείς οι οποίοι υποβλήθηκαν σε σειρά κλινικών και εργαστηριακών εξετάσεων ενώ οι γονείς τους κλήθηκαν να συμπληρώσουν το ερωτηματολόγιο Child Health Questionnaire-Parent Form 50, και τα αποτελέσματα συγκρίθηκαν με αυτά 61 υγιών μαρτύρων. Αποδείχθηκε ότι η νευροϊνωμάτωση τύπου 1 επιβαρύνει σημαντικά την ποιότητα ζωής των ασθενών. Αναπτυξιολογικές, νευρολογικές, νευροοφθαλμολογικές και δερματολογικές επιπλοκές επιβαρύνουν σημαντικά την ποιότητα ζωής, ενώ οι καλές ενδοοικογενειακές σχέσεις συνεισέφεραν σημαντικά στην βελτίωσή της
description: The aim of this study is to evaluate quality of life in children with neurofobromatosis type 1 and to highlight the disease parameters with the greater impact. 43 children were evaluated using Child Health Questionnaire-Parent From 50 and a series of clinical and laboratory tests. The results were compared to those of a group of 61 healthy peers. Neurofobromatosis type 1 adversely effects quality of life. Cognitive, neurological, neurophthalmological and cutaneous complications cause significant impact on quality of life. Good family relations and strong family cohesion are factors leading to the improvement of the patients quality if life
Recovery of Metals from Electronic Waste by Reduction Melting Method
Creators: name: Pornpaitoon Laosombatthawee
name: Dawan Wiwattanadate
name: Sujarinee Kotchawattana
Publisher: name: Environmental Research Institute Chulalongkorn University Press
Year: 2015
Subjects: E-waste recycling, reduction melting method, metal recovery from e-wastes

description: 1, 37, Applied Environmental Research
The extraction of nuclear sea quark distribution and energy loss effect in Drell-Yan experiment
Creators: name: Duan, Chun-Gui
name: Liu, Na
name: Yan, Zhan-Yuan
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The next-to-leading order and leading order analysis are performed on the differential cross section ratio from Drell-Yan process. It is found that the effect of next-to-leading order corrections can be negligible on the differential cross section ratios as a function of the quark momentum fraction in the beam proton and the target nuclei for the current Fermilab and future lower beam proton energy. The nuclear Drell-Yan reaction is an ideal tool to study the energy loss of the fast quark moving through cold nuclei. In the leading order analysis, the theoretical results with quark energy loss are in good agreement with the Fermilab E866 experimental data on the Drell-Yan differential cross section ratios as a function of the momentum fraction of the target parton. It is shown that the quark energy loss effect has significant impact on the Drell-Yan differential cross section ratios. The nuclear Drell-Yan experiment at current Fermilab and future lower energy proton beam can not provide us with more information on the nuclear sea quark distribution.
description: 17 pages, 4 figures
Structural Characterization of Many-Particle Systems on Approach to Hyperuniform States
Creators: name: Torquato, Salvatore
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We explore quantitative descriptors that herald when a many-particle system in $d$-dimensional Euclidean space $\mathbb{R}^d$ approaches a hyperuniform state as a function of the relevant control parameter. We establish quantitative criteria to ascertain the extent of hyperuniform and nonhyperuniform distance-scaling regimes n terms of the ratio $B/A$, where $A$ is "volume" coefficient and $B$ is "surface-area" coefficient associated with the local number variance $σ^2(R)$ for a spherical window of radius $R$. To complement the known direct-space representation of the coefficient $B$ in terms of the total correlation function $h({\bf r})$, we derive its corresponding Fourier representation in terms of the structure factor $S({\bf k})$, which is especially useful when scattering information is available experimentally or theoretically. We show that the free-volume theory of the pressure of equilibrium packings of identical hard spheres that approach a strictly jammed state either along the stable crystal or metastable disordered branch dictates that such end states be exactly hyperuniform. Using the ratio $B/A$, the hyperuniformity index $H$ and the direct-correlation function length scale $ξ_c$, we study three different exactly solvable models as a function of the relevant control parameter, either density or temperature, with end states that are perfectly hyperuniform. We analyze equilibrium hard rods and "sticky" hard-sphere systems in arbitrary space dimension $d$ as a function of density. We also examine low-temperature excited states of many-particle systems interacting with "stealthy" long-ranged pair interactions as the temperature tends to zero. The capacity to identify hyperuniform scaling regimes should be particularly useful in analyzing experimentally- or computationally-generated samples that are necessarily of finite size.
description: 19 pages, 14 figures
Κορημετρία σε βαριά μυασθένεια
Creators: name: Τσίπτσιος, Δημήτριος Ι.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Κεντρικό χολινεργικό σύστημα
Λείοι μύες κόρης
Αυτόνομο νευρικό σύστημα
Central cholinergic system
Iris' smooth muscles
Autonomic nervous system

description: Στόχο της παρούσας έρευνας, η οποία άρχισε και ολοκληρώθηκε στο Εργαστήριο Κλινικής Νευροφυσιολογίας του Πανεπιστημιακού Νοσοκομείου ΑΧΕΠΑ, αποτελεί η διερεύνηση της εμπλοκής μη σκελετικών χολινεργικών συνάψεων στη ΒΜ. Ο σκοπός αυτός πραγματοποιείται με δύο τρόπους: Πρώτο, δια της καταγραφής, με τη χρήση ειδικής ψηφιακής video-κάμερας, του Αντανακλαστικού της Κόρης στο Φως (ΑΚΦ) - σε μονήρη και σε επαναλαμβανόμενα φωτεινά ερεθίσματα - τριαντατεσσάρων ασθενών με προσφάτως διαγνωσμένη ΒΜ, κατηγορίας ΙΙ-ΙΙΙ κατά την MGFA; 2000, και δια του ηλεκτρονικού υπολογισμού των αριθμητικών τιμών των παραμέτρων του ΑΚΦ καθενός από τους μυασθενικούς, με την αρωγή εξειδικευμένου κορημετρικού ηλεκτρονικού προγράμματος. Δεύτερο, αφετέρου δια της στατιστικής ανάλυσης και σύγκρισης των εξαγόμενων αποτελεσμάτων με τα αντίστοιχα που προκύπτουν από την ομότροπη καταγραφή του ΑΚΦ σε μονήρη και σε επαναλαμβανόμενα φωτεινά ερεθίσματα ισάριθμων εθελοντών, ανάλογης ηλικίας και φύλου, που συγκροτούν την ομάδα ελέγχου
description: The aim of the present study that was fully conducted in the Laboratory of Clinical Neurophysiology of the AHEPA University Hospital in Thessaloniki, Greece is to investigate whether or not non-striated cholinergic junctions are affected in MG. For this purpose the Pupil Light Reflex (PLR) to single and multiple flash stimuli of thirty-four recently diagnosed myasthenic patients, grade II-III according to the MGFA; 2000, was recorded with the assistance of a digital video-camera and the arithmetic values of the PLR parameters were automatically calculated with the aid of a specifically constructed computerized pupillometric program. Furthermore, the estimated arithmetic values were statistically processed and compared with the respective arithmetic values of the PLR parameters to single and multiple flash stimuli of thirty-four non-myasthenic patients, matching age and gender
ASASSN-14lp: two possible solutions for the observed UV suppression
Creators: name: Barna, Barnabás
name: Pereira, Talytha
name: Taubenberger, Stefan
name: Magee, Mark
name: Kromer, Markus
name: Kerzendorf, Wolfgang
name: Vogl, Christian
name: Williamson, Marc E.
name: Flörs, Andreas
name: Noebauer, Ulrich M.
name: Foley, Ryan J.
name: Sasdelli, Michele
name: Hillebrandt, Wolfgang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We test the adequacy of ultraviolet (UV) spectra for characterizing the outer structure of Type Ia supernova (SN) ejecta. For this purpose, we perform spectroscopic analysis for ASASSN-14lp, a normal SN Ia showing low continuum in the mid-UV regime. To explain the strong UV suppression, two possible origins have been investigated by mapping the chemical profiles over a significant part of their ejecta. We fit the spectral time series with mid-UV coverage obtained before and around maximum light by HST, supplemented with ground-based optical observations for the earliest epochs. The synthetic spectra are calculated with the one dimensional MC radiative-transfer code TARDIS from self-consistent ejecta models. Among several physical parameters, we constrain the abundance profiles of nine chemical elements. We find that a distribution of $^{56}$Ni (and other iron-group elements) that extends toward the highest velocities reproduces the observed UV flux well. The presence of radioactive material in the outer layers of the ejecta, if confirmed, implies strong constraints on the possible explosion scenarios. We investigate the impact of the inferred $^{56}$Ni distribution on the early light curves with the radiative transfer code TURTLS, and confront the results with the observed light curves of ASASSN-14lp. The inferred abundances are not in conflict with the observed photometry. We also test whether the UV suppression can be reproduced if the radiation at the photosphere is significantly lower in the UV regime than the pure Planck function. In this case, solar metallicity might be sufficient enough at the highest velocities to reproduce the UV suppression.
description: 18 pages, 16 figures, accepted for publication in MNRAS
Επιτπώσεις αιμορραγικού shock κονίκλων στο όργανο της όρασης των εμβρύων
Creators: name: Δεσίρης, Παναγιώτης Αγγ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Αιμορραγική καταπληξία
Οργανογένεση
Haemorrhagic shock
Organogenesis

description: ΣΚΟΠΟΣ: H διερεύνηση των επιπτώσεων της οξείας αιμορραγικής καταπληξίας στη διάπλαση των οργάνων της όρασης σε έμβρυα εγκυμονούσης κονίκλου. ΜΕΘΟΔΟΣ: Πρόκληση οξείας αιμορραγικής καταπληξίας, με ταχεία αφαίμαξη σε 20 ενήλικες υγιείς θηλυκούς κυοφορούντες κονίκλους, βάρους περίπου 3,9-4,1kg. Η πειραματική προσομοίωση της αιμορραγικής καταπληξίας έγινε κατά την κρίσιμη περίοδο της οργανογένεσης των οφθαλμών των κυοφορούμενων εμβρύων και η ανάταξή της 30΄ λεπτά αργότερα. Αντικείμενο της μελέτης ήταν οι οφθαλμοί των νεογεννήτων που εξετάσθηκαν κλινικά και εργαστηριακά. ΑΠΟΤΕΛΕΣΜΑΤΑ: Από τον νεκροτομικό, βιομικροσκοπικό, ιστολογικό και ηλεκτροαμφιβληστροειδικό έλεγχο των νεογέννητων κονίκλων δεν παρατηρήθηκε καμία αλλοίωση στη δομή και τη λειτουργία των οφθαλμών των εμβρύων. ΣΥΜΠΕΡΑΣΜΑΤΑ: Αιμορραγική καταπληξία διάρκειας 30 λεπτών, ακολουθούμενη από πλήρη και αποτελεσματική ανάταξη της, κατά την κύηση και πιο συγκεκριμένα κατά το στάδιο της οργανογένεσης των οφθαλμών δεν παρουσιάζει επιβλαβείς επιπτώσεις στους οφθαλμούς των νεογεννήτων
description: AIM: The investigation of the repercussions of acute haemorrhagic shock in the formation of the eyes of the foetuses of pregnant rabbit. METHOD: We provoked acute haemorrhagic shock, by rapid bloodletting in 20 adult, pregnant rabbits, weight roughly from 3,9 to 4,1kg. The experimental simulation of haemorrhagic shock was induced at the critical period of the organogenesis of the eyes of the rabbit foetuses. The pregnant rabbits were treated and recovered 30 minutes later. Object of our study were the eyes of the newborn that were examined clinical and laboratorial. RESULTS: From the dissection of the eye, the clinical examination, the histological and ERG results there was no alteration in the structure and the function of eyes of foetuses. CONCLUSIONS: Haemorrhagic shock with duration up to 30 minutes followed from complete and effective treatment, during gestation and more specifically at the stage of organogenesis of the eyes does not cause harmful repercussions in the eyes of newborn
Probing the atmospheric precipitable water vapor with SOFIA, Part I, Measurements of the water vapor overburden with FIFI-LS
Creators: name: Fischer, C.
name: Iserlohe, C.
name: Vacca, W.
name: Fadda, D.
name: Colditz, S.
name: Fischer, N.
name: Krabbe, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We report on the measurements of telluric water vapor made with the instrument FIFI-LS on SOFIA. Since November 2018, FIFI-LS has measured the water vapor overburden with the same measurement setup on each science flight with about 10 data points throughout the flight. This created a large sample of 469 measurements at different locations, flight altitudes and seasons. The paper describes the measurement principle in detail and provides some trend analysis on the 3 parameters. This presents the first systematic analysis with SOFIA based on in situ observations.
description: 15 pages, 7 figures, 1 tables, accepted for publication in Publications of the Astronomical Society of the Pacific (PASP)
Perception and Communication of Flood Risk: Lessons Learned about Thailand's Flood Crisis of 2011
Creators: name: Suthirat Kittipongvises
name: Mino, Takashi
Publisher: name: Environmental Research Institute Chulalongkorn University Press
Year: 2015
Subjects: Flood, perception, risk communication, Thai flood crisis

description: 1, 37, Applied Environmental Research
On unique parametrization of the linear group GL(4.C) and its subgroups by using the Dirac matrix algebra basis
Creators: name: Bogush, A. A.
name: Red'kov, V. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A unifying overview of the ways to parameterize the linear group GL(4.C) and its subgroups is given. As parameters for this group there are taken 16 coefficients G = G(A,B,A_{k}, B_{k}, F_{kl}) in resolving matrix G in terms of 16 basic elements of the Dirac matrix algebra. Alternatively to the use of 16 tensor quantities, the possibility to parameterize the group GL(4.C) with the help of four 4-dimensional complex vectors (k, m, n, l) is investigated. The multiplication rules G'G are formulated in the form of a bilinear function of two sets of 16 variables. The detailed investigation is restricted to 6-parameter case G(A, B, F_{kl}), which provides us with spinor covering for the complex orthogonal group SO(3.1.C). The complex Euler's angles parametrization for the last group is also given. Many different parametrizations of the group based on the curvilinear coordinates for complex extension of the 3-space of constant curvature are discussed. The use of the Newmann-Penrose formalism and applying quaternion techniques in the theory of complex Lorentz group are considered. Connections between Einstein-Mayer study on semi-vectors and Fedorov's treatment of the Lorentz group theory are stated in detail. Classification of fermions in intrinsic parities is given on the base of the theory of representations for spinor covering of the complex Lorentz group.
description: 23 pages, submitted to Nonlinear Phenomena in Complex Systems
On Shock Waves in Models with V-Shaped Potentials
Creators: name: Klimas, Pawel
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The recently found shock wave solution in the scalar field model with the field potential $V(ϕ)=|ϕ|$ is generalized to the case $V(ϕ)=|ϕ|-{1/2}λϕ^2$. We find two kinds of the shock waves, which are analogous of compression and expansion waves. The dependence of the waves on the parameter $λ$ is investigated in detail.
description: 18 pages, 18 figures
Review of the Current Situation of Cd Contamination in Agricultural Field in the Mae Sot District, Tak Province, Northwestern Thailand
Creators: name: Pensiri Akkajit
Publisher: name: Environmental Research Institute Chulalongkorn University Press
Year: 2015
Subjects: Cd, contamination, Mae Sot, mining, phytoremediation, soil, Tak province, Zn

description: 1, 37, Applied Environmental Research
Point Source Contamination in CMB Non-Gaussianity Analyses
Creators: name: Babich, Daniel
name: Pierpaoli, Elena
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we analyze the biasing effect of point sources, either thermal Sunyaev-Zeldovich clusters or standard radio sources, on the estimated strength of the non-Gaussianity in the Cosmic Microwave Background (CMB). We show that the biggest contribution comes from the cross--correlation of the CMB with the matter density rather than from the poisson term which is conventionally assumed in these calculations. For the three year WMAP data, we estimate that point sources could produce a non--Gaussian signature equivalent to a bias in $f_{NL}$ of $0.35, 0.24, -0.097, -0.13$ in the Ka, Q, V and W bands respectively. The level of bias we find is largely insufficient to explain the very high $f_{NL}$ values recently detected by Yadav and Wandelt. For Planck, we estimate the point source bispectra to contaminate the $f_{NL}$ estimator with a bias of $1.3, 0.34, -0.25, -0.48$ at $30, 44, 70, 100 {\rm GHz}$ respectively. These results depend on the assumed redshift distribution of the point sources. However, given the projected Planck sensitivity of $Δf_{NL} \simeq 5$ (95 % C.L.), a good estimate of point sources' properties including their number density and redshift distribution is essential before deriving strong conclusions on primordial non--Gaussianity.
description: 15 pages, 7 figures. To be submitted to PRD
Materials of the Hupa Language Documentation Project
Creators: name: Parker, Verdena
name: Ammon, Danny
name: Begay, Kayla
name: Campbell, Amy
name: Chase, Sara
name: Demitrescu, Suzi
name: Escamilla, Ramón
name: Fleisher, Nicholas
name: Garrett, Andrew
name: George-Moore, Melodie
name: Golla, Victor
name: Jackson, Silis
name: Jacobson, Alex
name: Kelly, Christine
name: Lee-Wynant, Tyler
name: Martins, Jacalyn
name: Mose, Ophelia
name: Newbold, Lindsey
name: Pycha, Anne
name: Spence, Justin
name: Yu, Xuying Yuki
name: Kaser, Catalin
name: Lincoln, Perry
name: Parker, Becqui
name: Parker, Otis
name: Rice, Keren
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021

description: The recordings in this collection are the result of Verdena Parker's longstanding collaboration with researchers affiliated with the Hupa Language Documentation Project, which originated at UC Berkeley in 2005. Ramón Escamilla and Justin Spence joined the project in 2007, and they have continued the research effort since moving to the University of Central Arkansas and the University of California, Davis, respectively. As of August 2020, this deposit covers their work with Mrs. Parker from 2015 to 2019, funded by a grant from the National Science Foundation's Documenting Endangered Languages program (BCS #1500851). The recordings cover a broad range of topics: original texts told by Mrs. Parker, including narrations of 8mm films she recorded in the 1960s; sessions in which recordings are transcribed and/or translated; elicitation of paradigms, grammatical phenomena such as evidentiality, purpose clauses, and indefinites, and words and phrases for use in language revitalization programs; re-transcription and translation of unpublished texts found in archival sources. Some of the recordings that were transcribed and translated are part of existing collections at the Survey of California and Other Indian Languages, or they are part of the the present deposit. Others were created by the Hupa Language Documentation Project in previous years and will be deposited at a later date.
Additional file 1 of Identification, pyramid and candidate genes of QTLs for associated traits based on a dense erect panicle rice CSSL-Z749 and five SSSLs, three DSSLs and one TSSL
Creators: name: Wang, Dachuan
name: Zhou, Kai
name: Xiang, Siqian
name: Zhang, Qiuli
name: Li, Ruxiang
name: Li, Miaomiao
name: Liang, Peixuan
name: Farkhanda, Naz
name: He, Guanghua
name: Ling, Yinghua
name: Zhao, Fangming
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Table S1. Primers used in the study.
A simulation model of road user behaviour and traffic conflicts at unsignalized intersections
Creators: name: Sayed, Tarek A.
Publisher: name: University of British Columbia
Year: 2008

description: This thesis describes a visual microscopic traffic conflicts simulation model for both T and 4-leg unsignalized intersections. The objective of the model is to study traffic conflicts as critical traffic situations and understand the driver's behaviour at these situations. The Author rejected the use of pure gap acceptance criteria to describe driver's behaviour at unsignalized intersections. As an alternative, a combination of some aspects of the gap acceptance criteria and the effect of several parameters including driver’s characteristics such as age and sex and the waiting time are used to describe that behaviour. The model also investigates the effect of different traffic parameters such as volume and speed on the number and severity of traffic conflicts. The model is unique in so far as it stores the traffic conflicts that occur during the simulation for latter study. A graphical animation display is used to show how the conflict occurred and the value of critical variables at this time. The model results were hypothetically validated against previous work in the literature and externally validated using field observations from two unsignalized intersections. In both cases the validation process proved successful.
Stability and thermodynamics of brane black holes
Creators: name: Abdalla, E.
name: Cuadros-Melgar, B.
name: Pavan, A. B.
name: Molina, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider scalar and axial gravitational perturbations of black hole solutions in brane world scenarios. We show that perturbation dynamics is surprisingly similar to the Schwarzschild case with strong indications that the models are stable. Quasinormal modes and late-time tails are discussed. We also study the thermodynamics of these scenarios verifying the universality of Bekenstein's entropy bound as well as the applicability of 't Hooft's brickwall method.
description: 13 pages, 8 figures, published version
Values of the $\mathfrak{sl}_2$ weight system on complete bipartite graphs
Creators: name: Filippova, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geometric Topology (math.GT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: A weight system is a function on chord diagrams that satisfies the so-called four-term relations. Vassiliev's theory of finite-order knot invariants describes these invariants in terms of weight systems. In particular, there is a weight system corresponding to the colored Jones polynomial. This weight system can be easily defined in terms of the Lie algebra $\mathfrak{sl}_2$, but this definition is too cumbersome from the computational point of view, so that the values of this weight system are known only for some limited classes of chord diagrams. In the present paper we give a formula for the values of the $\mathfrak{sl}_2$ weight system for a class of chord diagrams whose intersection graphs are complete bipartite graphs with no more than three vertices in one of the parts. Our main computational tool is the Chmutov--Varchenko reccurence relation. Furthermore, complete bipartite graphs with no more than three vertices in one of the parts generate Hopf subalgebras of the Hopf algebra of graphs, and we deduce formulas for the projection onto the subspace of primitive elements along the subspace of decomposable elements in these subalgebras. We compute the values of the $\mathfrak{sl}_2$ weight system for the projections of chord diagrams with such intersection graphs. Our results confirm certain conjectures due to S.K.Lando on the values of the weight system $\mathfrak{sl}_2$ at the projections of chord diagrams on the space of primitive elements.
description: 20 pages, 5 figures. Accepted for publication in Functional Analysis and Its Applications
Towards a fitting procedure for deeply virtual Compton scattering at next-to-leading order and beyond
Creators: name: Kumericki, K.
name: Müller, D.
name: Passek-Kumericki, K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Combining dispersion and operator product expansion techniques, we derive the conformal partial wave decomposition of the virtual Compton scattering amplitude in terms of complex conformal spin to twist-two accuracy. The perturbation theory predictions for the deeply virtual Compton scattering (DVCS) amplitude are presented in next-to-leading order for both conformal and modified minimal subtraction scheme. Within a conformal subtraction scheme, where we exploit predictive power of conformal symmetry, the radiative corrections are presented up to next-to-next-to-leading order accuracy. Here, because of the trace anomaly, the mixing of conformal moments of generalized parton distributions (GPD) at the three-loop level remains unknown. Within a new proposed parameterization for GPDs, we then study the convergence of perturbation theory and demonstrate that our formalism is suitable for a fitting procedure of DVCS observables.
description: LaTeX, 100 pages, 16 figures, 5 tables; Secs. 5.1 and 5.2 revised, minor corrections, version to be published in Nucl.Phys.B
On the early-time behavior of quantum subharmonic generation
Creators: name: Choi, Yunjin
name: Hemmerling, Boerge
name: Tsai, Shan-Wen
name: Mills, Allen P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A few years ago Avetissian {\it et al.} \cite{Avetissian2014,Avetissian2015} discovered that the exponential growth rate of the stimulated annihilation photons from a singlet positronium Bose-Einstein condensate should be proportional to the square root of the positronium number density, not to the number density itself. In order to elucidate this surprising result obtained via a field-theoretical analysis, we point out that the basic physics involved is the same as that of resonant subharmonic transitions between two quantum oscillators. Using this model, we show that nonlinearities of the type discovered by Avetissian {\it et al.} are not unique to positronium and in fact will be encountered in a wide range of systems that can be modeled as nonlinearly coupled quantum oscillators.
description: 5 pages and 1 figure
Relativistic Modified Newtonian Dynamics from String Theory?
Creators: name: Mavromatos, Nick
name: Sakellariadou, Mairi
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We argue that TeVeS-like vector fields appear naturally in certain string theory backgrounds involving D0-branes, as a result of the recoil velocity field, expressing the interaction of neutrino string matter with point-like branes. However, the similarity with TeVeS models is restricted only to the bi-metric properties of space time, namely the difference of the background metric from the one felt by (some) matter fields interacting, in a topologically non-trivial manner, with the D0-brane defects. In our approach, neutrinos appear as dark matter candidates that could be ``captured'' by the D0 branes, as a result of stringy properties, and thus couple with the recoil-vector fields. Moreover, we argue in support of a possibly preferential role of neutrinos in inducing novel non-perturbative contributions to ``vacuum'' (dark) energy, in addition to their ordinary dark matter contribution. In fact, the role of neutrinos as providing substantial contributions to dark matter and dark energy components of the Universe, suggested by our approach, appears also to be necessitated by the need to reproduce the peaks in the Cosmic Microwave Background radiation spectrum, as claimed recently in the literature. Thus, our framework may be viewed as providing a microscopic explanation of such phenomenological conclusions concerning TeVeS-like, Lorentz-violating models.
description: 6 pages; slightly amended version to appear in Physics Letters B