cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Building an AdS/CFT superconductor
Creators: name: Hartnoll, Sean A.
name: Herzog, Christopher P.
name: Horowitz, Gary T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Superconductivity (cond-mat.supr-con)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that a simple gravitational theory can provide a holographically dual description of a superconductor. There is a critical temperature, below which a charged condensate forms via a second order phase transition and the (DC) conductivity becomes infinite. The frequency dependent conductivity develops a gap determined by the condensate. We find evidence that the condensate consists of pairs of quasiparticles.
description: 1+10 pages, 4 figures, LaTeX
การใช้วารสารที่จัดให้บริการโดยสำนักวิทยบริการและเทคโนโลยีสารสนเทศของนักศึกษา มหาวิทยาลัยราชภัฏกลุ่มรัตนโกสินทร์
Creators: name: บรรพต พิจิตรกำเนิด
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2555
Subjects: การใช้วารสาร,วารสารสิ่งพิมพ์,วารสารอิเล็กทรอนิกส์

description: 2, 8, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
The Dark Side and its Nature
Creators: name: Bonometto, S. A.
name: Mainini, R.
name: Colombo, L. P. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Although the cosmic concordance cosmology is quite successful in fitting data, fine tuning and coincidence problems apparently weaken it. We review several possibilities to ease its problems, by considering various kinds of dynamical Dark Energy and possibly its coupling to Dark Matter, trying to set observational limits on Dark Energy state equation and coupling.
description: Proceedings of the workshop dsu2006, "The dark side of the Universe", Madrid, June 20-24, 2006
Ανάπτυξη UHPLC μεθόδου για την υποστήριξη του ισχυρισμού υγείας για τα πολικά φαινολικά συστατικά του παρθένου ελαιολάδου [Κανονισμός (ΕΕ) Αριθ. 432/2012]
Creators: name: Σωτήρογλου, Μιχαήλα Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ισχυρισμός υγείας
Παρθένο ελαιόλαδο
Πολικά φαινολικά συστατικά
Health claim
Virgin olive oil
Polar phenolic constituents

description: Στην παρούσα εργασία αναπτύχθηκε μια UHPLC-DAD-FLD μέθοδος για τον προσδιορισμό του περιεχομένου του παρθένου ελαιολάδου σε ολική υδροξυτυροσόλη και τυροσόλη και την υποστήριξη του ισχυρισμού υγείας του Κανονισμού (ΕΕ) Αριθ 432/2012 για τις «πολυφαινόλες του ελαιολάδου». Για την παραλαβή του πολικού κλάσματος εφαρμόστηκε εκχύλιση υγρού-υγρού υποβοηθούμενη από υπερήχους, ενώ για την απλοποίηση του προφίλ των πολικών φαινολικών συστατικών όξινη υδρόλυση. Για την επικύρωση της μεθόδου που αναπτύχθηκε διερευνήθηκαν χαρακτηριστικά απόδοσης, όπως η γραμμικότητα, το LOD και το LOQ, η ακρίβεια και ειδικότερα η επαναληψιμότητα μέσα στη μέρα και μεταξύ ημερών και η πιστότητα με τη διενέργεια πειραμάτων ανάκτησης. Τα LOQs για τις ενώσεις ενδιαφέροντος ήταν κάτω από 0,45 μg/ml με τον DAD και κάτω από 0,05 μg/ml με τον FLD. Oι τιμές της επαναληψιμότητας (εκφρασμένες σε εκατοστιαία σχετική τυπική απόκλιση, % RSD) ήταν χαμηλότερες από 5 % μέσα στην ίδια μέρα και από 10 % μεταξύ διαφορετικών ημερών, ενώ η εκατοστιαία ανάκτηση της υδροξυτυροσόλης και της τυροσόλης ήταν ξεπερνούσε το 80 % για τα τρία επίπεδα που εξετάστηκε (2,5, 5 και 7,5 mg/20g). Η μέθοδος εφαρμόστηκε για την ανάλυση πραγματικών δειγμάτων, ενώ για συγκριτικούς σκοπούς τα ίδια δείγματα αναλύθηκαν και με την HPLC.
description: A UHPLC-DAD-FLD method was developed for the determination of total hydroxytyrosol and tyrosol content of virgin olive oil and the utilization of the health claim for “olive oil polyphenols” included in Regulation (EU) No 432/2012. The polar fractions were obtained by means of ultrasound-assisted liquid-liquid extraction and the simplification of the chromatographic pattern of the polar phenolic compounds was achieved via acid hydrolysis. The method was validated and applied for the analysis of real samples. The performance characteristics evaluated during the validation process were linearity, LOD and LOQ, precision in terms of intraday and interlay repeatability and trueness by means of recovery. Limits of quantification (LOQs) were always lower than 0,45 ug/ml with DAD and 0,05 ug/ml with FLD. Repeatability values (expressed as relative standard deviations, RSDs) were lower than 5 % within a day and 10 % between different days. Finally, the recoveries were higher than 80 % for both hydroxytyrosol and tyrosol at three concentration levels (2,5, 5 και 7,5 mg/20g). The applicability and reliability of this methodology have been confirmed using real samples that were also analyzed with HPLC.
Heat transport in an ordered harmonic chain in presence of a uniform magnetic field
Creators: name: Bhat, Junaid
name: Cane, Gaëtan
name: Bernardin, Cédric
name: Dhar, Abhishek
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider heat transport across a harmonic chain of charged particles, with transverse degrees of freedom, in the presence of a uniform magnetic field. For an open chain connected to heat baths at the two ends we obtain the nonequilibrium Green's function expression for the heat current. This expression involves two different Green's functions which can be identified as corresponding respectively to scattering processes within or between the two transverse waves. The presence of the magnetic field leads to two phonon bands of the isolated system and we show that the net transmission can be written as a sum of two distinct terms attributable to the two bands. Exact expressions are obtained for the current in the thermodynamic limit, for the the cases of free and fixed boundary conditions. In this limit, we find that at small frequency $ω$, the effective transmission has the frequency-dependence $ω^{3/2}$ and $ω^{1/2}$ for fixed and free boundary conditions respectively. This is in contrast to the zero magnetic field case where the transmission has the dependence $ω^2$ and $ω^0$ for the two boundary conditions respectively, and can be understood as arising from the quadratic low frequency phonon dispersion.
แรงจูงใจในการปฏิบัติงานของบุคลากรสังกัดวิทยาลัยชุมชน
Creators: name: ฐากูร ปาละนันทน์
name: จารุวรรณ สกุลคู
name: สุชาดา สุธรรมรักษ์
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2555
Subjects: แรงจูงใจ,วิทยาลัยชุมชน,บุคลากร,การปฏิบัติงาน

description: 2, 8, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Riemannian curvature: variations on different notions of positivity
Creators: name: Labbi, Mohammed Larbi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53C21; 53C25; 53B20, 58A14; 58D17; 58E11

description: We study different notions of Riemannian curvatures: The $p$-curvatures which interpolate between the scalar curvature and the sectional curvature, the Gauss-Bonnet-Weyl curvatures form another interpolation from the scalar curvature to the Gauss-Bonnet integrand. We bring out the $(p,q)$-curvatures, which incorporate all the previous curvatures. We then examine the curvature term which appears in the classical Weitzenböck formula. We also study the positivity properties of the $p$-curvatures, the second Gauss-Bonnet-Weyl curvature, the Einstein curvature and the isotropic curvature.
description: In french, extracted from habilitation thesis at Montpellier II University (France), 50 pages
Weight loss effect of Glucagon-like peptide-1 receptor agonists in obese, non- diabetic patients: A systematic review and meta-analysis
Creators: name: Πιέτρη, Αικατερίνη Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Απώλεια βάρους
Αγωνιστές του προσομοιάζοντος της γλυκαγόνης πεπτιδίου 1 υποδοχέα
Παχυσαρκία
Weight loss
Glucagon-like peptide-1 receptor agonists
Obesity

description: The aim of the present thesis was the study of the effect of at least 20 weeks glucagon-like peptide 1 receptor agonists (GLP-1 RA’s) on weight loss in obese, non diabetic patients. For this purpose, we underwent through a systematic review of the international published literature in medical databases, for randomized trials using relevant to the weight loss and GLP-1 RA’s terminology. Furthermore, the collected studies were assessed in terms of systematic bias risk and results were presented in details. Additionally to the systematic review, data from the selected studies were extracted and analyzed through meta-analysis, evaluating as a primary endpoint the mean weight loss from baseline. Moreover, secondary outcomes analyses included efficacy endpoints like mean difference in waist circumference from baseline and percentage of patients achieving >5% weight loss as well as endpoints concerning safety issues and potential drug induced adverse events. In conclusion, the results led to the overall evaluation of the clinical value of long-term use of GLP-1 RA's as a therapeutic option in the treatment of obesity in non-diabetic patients.
description: Σκοπός της διατριβής ήταν η μελέτη της επίδρασης για τουλάχιστον 20 εβδομάδες των αγωνιστών του υποδοχέα του προσομοιάζοντος με τη γλυκαγόνη πεπτιδίου-1 (GLP-1 RA’s) στο σωματικό βάρος σε παχύσαρκους, μη διαβητικούς ασθενείς. Πραγματοποιήθηκε συστηματική ανασκόπηση της διεθνούς βιβλιογραφίας σε ιατρικές βιβλιογραφικές βάσεις δεδομένων, για τυχαιοποιημένες μελέτες, χρησιμοποιώντας σχετιζόμενη με το θέμα ορολογία που αφορούν την απώλεια βάρους και τα GLP-1 RA’s. Εν συνεχεία πραγματοποιήθηκε και παρουσιάστηκε αναλυτικά η αξιολόγηση σφαλμάτων των μελετών που πληρούσαν τα κριτήρια. Επιπρόσθετα ακολούθησε εξαγωγή και μετα- ανάλυση των δεδομένων των μελετών αξιολογώντας ως πρωτεύον τελικό σημείο την μέση απώλεια βάρους από την έναρξη χορήγησης της κάθε θεραπείας. Πραγματοποιήθηκε περαιτέρω αναλύσεις σχετικά με καταληκτικά σημεία αποτελεσματικότητας όπως η μείωση της μέσης τιμής περιφέρειας της μέσης και του ποσοστού των ασθενών που επιτυγχάνουν απώλεια βάρους >5% καθώς επίσης και ασφάλειας που αφορούν επαγόμενες από τη θεραπεία ανεπιθύμητες ενέργειες. Εκ των αποτελεσμάτων αξιολογήθηκε η κλινική αξία της μακροχρόνιας χρήσης των GLP-1 RA’s ως θεραπευτική επιλογή στην αντιμετώπιση της παχυσαρκίας σε μη διαβητικούς ασθενείς.
Simulations of expected signal and background of gamma-ray sources by large field-of-view detectors aboard CubeSats
Creators: name: Galgóczi, Gábor
name: Řípa, Jakub
name: Campana, Riccardo
name: Werner, Norbert
name: Pál, András
name: Ohno, Masanori
name: Mészáros, László
name: Mizuno, Tsunefumi
name: Tarcai, Norbert
name: Torigoe, Kento
name: Uchida, Nagomi
name: Fukazawa, Yasushi
name: Takahashi, Hiromitsu
name: Nakazawa, Kazuhiro
name: Hirade, Naoyoshi
name: Hirose, Kengo
name: Hisadomi, Syohei
name: Enoto, Teruaki
name: Odaka, Hirokazu
name: Ichinohe, Yuto
name: Frei, Zsolt
name: Kiss, László
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In recent years the number of CubeSats (U-class spacecrafts) launched into space has increased exponentially marking the dawn of the nanosatellite technology. In general these satellites have a much smaller mass budget compared to conventional scientific satellites which limits shielding of scientific instruments against direct and indirect radiation in space. In this paper we present a simulation framework to quantify the signal in large field-of-view gamma-ray scintillation detectors of satellites induced by X-ray/gamma-ray transients, by taking into account the response of the detector. Furthermore, we quantify the signal induced by X-ray and particle background sources at a Low-Earth Orbit outside South Atlantic Anomaly and polar regions. Finally, we calculate the signal-to-noise ratio taking into account different energy threshold levels. Our simulation can be used to optimize material composition and predict detectability of various astrophysical sources by CubeSats. We apply the developed simulation to a satellite belonging to a planned CAMELOT CubeSat constellation. This project mainly aims to detect short and long gamma-ray bursts (GRBs) and as a secondary science objective, to detect soft gamma-ray repeaters (SGRs) and terrestrial gamma-ray flashes (TGFs). The simulation includes a detailed computer-aided design (CAD) model of the satellite to take into account the interaction of particles with the material of the satellite as accurately as possible. Results of our simulations predict that CubeSats can complement the large space observatories in high-energy astrophysics for observations of GRBs, SGRs and TGFs. For the detectors planned to be on board of the CAMELOT CubeSats the simulations show that detections with signal-to-noise ratio of at least 9 for median GRB and SGR fluxes are achievable.
description: 86 pages, 30 figures, 8 tables, accepted for publication in Journal of Astronomical Telescopes, Instruments, and Systems
Planet-induced radio emission from the coronae of M dwarfs
Creators: name: Kavanagh, Robert D.
name: Vidotto, Aline A.
name: Klein, Baptiste
name: Jardine, Moira M.
name: Donati, Jean-François
name: Ó Fionnagáin, Dúalta
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence

description: There have recently been detections of radio emission from low-mass stars, some of which are indicative of star-planet interactions. Motivated by these exciting new results, here we present stellar wind models for the active planet-hosting M dwarf AU Mic. Our models incorporate the large-scale photospheric magnetic field map of the star, reconstructed using the Zeeman-Doppler Imaging method. We use our models to assess if planet-induced radio emission could be generated in the corona of AU Mic, through a mechanism analogous to the sub-Alfvénic Jupiter-Io interaction. In the case that AU Mic has a mass-loss rate of < 590 times that of the Sun, we find that both planets b and c in the system can induce radio emission from 10 MHz – 3 GHz in the corona of the host star for the majority of their orbits, with peak flux densities of 10 mJy. Our predicted emission bears a striking similarity to that recently reported from GJ 1151 by Vedantham et al. (2020), which is indicative of being induced by a planet.
description: {"references": ["van der Holst, Bart et al. (2014). Alfv\u00e9n Wave Solar Model (AWSoM): Coronal Heating.", "Klein, Baptiste et al. (2021b). Investigating the young AU Mic system with SPIRou: large-scale stellar magnetic field and close-in planet mass.", "Turnpenney, Sam et al. (2018). Exoplanet-induced Radio Emission from M Dwarfs.", "Vedantham, Harish et al (2020). Coherent radio emission from a quiescent red dwarf indicative of star-planet interaction."]}
Spin Exchange Rates in Proton-Hydrogen Collisions
Creators: name: Furlanetto, Steven
name: Furlanetto, Michael
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The spin temperature of neutral hydrogen, which determines the optical depth and brightness of the 21 cm line, is determined by the competition between radiative and collisional processes. Here we examine the role of proton-hydrogen collisions in setting the spin temperature. We use recent fully quantum mechanical calculations of the relevant cross sections, which allow us to present accurate results over the entire physically relevant temperature range 1-10,000 K. For kinetic temperatures T_K>100 K, the proton-hydrogen rate coefficient exceeds that for hydrogen-hydrogen collisions by about a factor of two. However, at low temperatures (T_K < 5 K) H-p collisions become several thousand times more efficient than H-H and even more important than H-e^- collisions.
description: submitted to MNRAS, 5 pages, 2 figures, typos corrected
Recordings of lexical and phrase elicitation
Creators: name: Inuma Orbe, Antonio
name: Beier, Christine
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: ccc

description: 43 stereo WAV files. All files created by CMB with AIO using a Zoom H4N Handy Recorder and Audio-Technica AT803B Omni-Directional Lavalier Condenser Microphone on a headphone mount. Files ccc_20220811-000.wav through ccc_20220811-007.wav correspond to Beier's notebook in 2022-08.011; files ccc_20220811-008.wav through ccc_20220811-042.wav correspond to the notebook in 2022-08.010.
CRIRES+: enabling high-resolution near-infrared spectroscopy and spectropolarimetry at the 8-m Very Large Telescope
Creators: name: Lavail, Alexis
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence, Young stars, CRIRES+, astronomy, spectroscopy, near-infrared, instrumentation

description: CRIRES+ is the fully refurbished and greatly enhanced near-infrared CRyogenic high-resolution Infrared Echelle Spectrograph (CRIRES) that will be offered to the entire astronomical community in 2021. CRIRES+ combines high spectral resolution and full near-infrared coverage, and enables a variety of long awaited scientific opportunities. CRIRES+ is an adaptive optics fed high-resolution (R~100000) near-infrared spectropolarimeter installed at one of the 8-m unit telescopes of the European Southern Observatory Very Large Telescope in Paranal, Chile. CRIRES+ operates in spectroscopy mode from 0.95 to 5.2 μm (YJHKLM bands) and in spectropolarimetry mode between 0.95 and 2.5 μm (YJHK). The instrument boasts an overall increase in efficiency compared to the original CRIRES, a tenfold increase in simultaneous wavelength coverage thanks to a new cross-dispersed design (now ~150 nm), and improved stability and repeatability. Additionally, a new powerful data reduction pipeline as well as new wavelength calibration capabilities including new gas cells and a Fabry-Perot etalon will allow to reach a few m/s in RV precision. The unique combination of the 8-m VLT collecting power, the R=100000 spectral resolution, and spectroscopic coverage up to 5.2 μm makes CRIRES+ a game-changing instrument for the study of exoplanetary atmospheres, stellar magnetism, low-mass objects, and other science cases.
One-loop unitarity of scalar field theories on Poincare invariant commutative nonassociative spacetimes
Creators: name: Sasai, Yuya
name: Sasakura, Naoki
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study scalar field theories on Poincare invariant commutative nonassociative spacetimes. We compute the one-loop self-energy diagrams in the ordinary path integral quantization scheme with Feynman's prescription, and find that the Cutkosky rule is satisfied. This property is in contrast with that of noncommutative field theory, since it is known that noncommutative field theory with space/time noncommutativity violates unitarity in the above standard scheme, and the quantization procedure will necessarily become complicated to obtain a sensible Poincare invariant noncommutative field theory. We point out a peculiar feature of the non-locality in our nonassociative field theories, which may explain the property of the unitarity distinct from noncommutative field theories. Thus commutative nonassociative field theories seem to contain physically interesting field theories on deformed spacetimes.
description: 25 pages, 9 figures ; appendix and references added
Nonlinear MHD simulations of external kinks in quasi-axisymmetric stellarators using an axisymmetric external rotational transform approximation
Creators: name: Ramasamy, Rohan
name: Hoelzl, Matthias
name: Strumberger, Erika
name: Lackner, Karl
name: Günter, Sibylle
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Reduced magnetohydrodynamic (MHD) equations are used to study the nonlinear dynamics of external kinks in a quasi-axisymmetric (QA) stellarator with varying fractions of external rotational transform. The large bootstrap currents associated with high beta plasmas may make QA configurations susceptible to low n external modes, limiting their operational space. The violence of the nonlinear dynamics, and, in particular, when these modes lead to a disruption, is not yet understood. In this paper, the nonlinear phase of external kinks in an unstable QA configuration with an edge safety factor below two is simulated. An axisymmetric approximation of this stellarator is constructed in the nonlinear MHD code, JOREK, capturing the influence of the external rotational transform. The use of this approximation for the considered stellarator is validated by comparing the linear dynamics against the linear viscoresistive MHD code, CASTOR3D. The nonlinear dynamics of this stellarator approximation are compared with an equivalent tokamak to understand the influence of a relatively small external rotational transform. While the external rotational transform does have a stabilising influence on the MHD activity, it remains violent. To explore the first order influence of a larger external rotational transform, this equilibrium parameter is artificially increased for the considered stellarator, reducing the effective plasma current. The violence of the kink instability is quantified, and shown to reduce with the increasing external rotational transform. At the same time, the external kink triggers internal modes that exacerbate the loss in confinement during the nonlinear phase, such that it remains large over much of the parameter space. It is only with a significant fraction of external rotational transform that these subsequent modes are stabilised.
description: This article has been submitted to Nuclear Fusion. This version includes revisions to take into account reviewer comments
Asymptotic Level Density of the Elastic Net Self-Organizing Feature Map
Creators: name: Claussen, Jens Christian
name: Schuster, Heinz Georg
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Whileas the Kohonen Self Organizing Map shows an asymptotic level density following a power law with a magnification exponent 2/3, it would be desired to have an exponent 1 in order to provide optimal mapping in the sense of information theory. In this paper, we study analytically and numerically the magnification behaviour of the Elastic Net algorithm as a model for self-organizing feature maps. In contrast to the Kohonen map the Elastic Net shows no power law, but for onedimensional maps nevertheless the density follows an universal magnification law, i.e. depends on the local stimulus density only and is independent on position and decouples from the stimulus density at other positions.
description: 8 pages, 10 figures. Link to publisher under http://link.springer.de/link/service/series/0558/bibs/2415/24150939.htm
Poster: Skin Conductance Response to Gradual-Increasing Experimental Pain
Creators: name: Syrjälä, Elise
name: Jiang, Mingzhe
name: Pahikkala, Tapio
name: Salanterä, Sanna
name: Liljeberg, Pasi
Publisher: name: Zenodo
Year: 2019
Subjects: acute pain
electrodermal activity
skin conductance
experimental pain
pain threshold
pain tolerance

description: Poster presentation at the 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society
description: Poster presentation of the conference paper. This research was supported by Academy of Finland project Personalized Pain Assessment System based on IoT (313488).
Bounded justice: gender, space and the law in early twentieth century Vancouver
Creators: name: Boyer, Laura Kate
Publisher: name: University of British Columbia
Year: 2009

description: This thesis represents a selective consideration of the relationships between gender, space and the law in early twentieth century Vancouver, based largely on the cases of sexual violence against women heard before the B.C. Supreme Court in the years between 1915 and 1925. Within these parameters, constructions of space and gender are addressed at three levels. Part one considers how both women and men were situated within early twentieth century legal discourse in the context of trials for sexual violence. Part two suggests how gendered understandings of urban space in early urban Vancouver were produced and reinforced within, and beyond, legal discourse. Finally, part three situates these processes within a wider context of statemaking in early twentieth century British Columbia. It is argued that legal processes were one mechanism by which space in fledgling Vancouver was coded in gendered and sexualized terms, and further, that these social meanings of space were fundamentally bound up with prevailing conceptions of race and class.
Optimisation par essaim de baleines discrète pour le problème du sac à dos multi dimensionnel multi-objectif
Creators: name: Bencharif, Bilal
name: zouache, djaafar
Publisher: name: Zenodo
Year: 2017
Subjects: Optimisation combinatoire, Méta-heuristiques, AOBD, Optimisation par essaim de baleines discrète, Problème de sac à dos multi objectif multi dimensionnel, MMKP.

description: Dans le cadre de ce mémoire nous proposons deux contributions. Premièrement, nous développons un nouvel algorithme d'optimisation discrète basé sur l'essaim inspiré du comportement de chasse des baleines à bosse. L'algorithme proposée appelée Algorithme d'Optimisation des Baleines Discrètes (AOBD). Ensuite, dans notre deuxième contribution, nous résolvons le problème de sac à dos multi objectif multi dimensionnel avec succès. Enfin, l'efficacité de l'algorithme AOBD développé dans cette recherche est évaluée par le métrique IGD, les valeurs trouvées par notre algorithme AOBD sur les instances MMKP sont surperformées sur les algorithmes: NSGAII, IMMOGLS, MOGLS et MOEA/D, il est à noter que ces résultats sont comparables avec les algorithmes de littérature, ceci est une preuve de l'efficacité de notre l'algorithme AOBD.
description: Within the framework of this thesis we propose two contributions. First, we develop a new discrete optimization algorithm based on the swarm inspired by the hunting behavior of humpback whales. The proposed algorithm called Discrete Whale Optimization Algorithm (DWOA). Then, in our second contribution, we solve the Multidimensional Multiple choice Knapsack Problem (MMKP) successfully. Finally, the efficiency of the DWOA algorithm developed in this research is evaluated by the IGD metric, the values found by our DWOA algorithm on the MMKP instances are outperformed on the algorithms: NSGAII, IMMOGLS, MOGLS and MOEA / D. Note that these results are comparable with literature algorithms; this is a proof of the effectiveness of our DWOA algorithm.
Structural phase transition and its consequences on optical behavior of LaV$_{1-x}$Nb$_x$O$_4$
Creators: name: Dua, Hemanshu
name: Shukla, Rishabh
name: Dhaka, R. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present the structural, electronic, vibrational, and photoluminescence properties of polycrystalline LaV$_{1-x}$Nb$_x$O$_4$ ($x =$ 0--0.2) samples at room temperature. The substitution of Nb at the V site shows the fascinating structural and optical behavior due to their isoelectronic character and larger ionic radii of Nb$^{5+}$ as compared to the V$^{5+}$. The Rietveld refinement of x-ray diffraction patterns demonstrate that the $x=$ 0 sample exist in a monoclinic (P2$_1$/n) phase, whereas for the $x >$ 0, both monoclinic and scheelite-tetragonal (I4$_1$/a) phases co-exist in a certain proportion. Interestingly, a monotonous enhancement in the Raman spectral intensity with Nb substitution is correlated with the substitution induced increase in the scheelite-tetragonal phase. The x-ray absorption measurements reveal that the La ions exist in a trivalent oxidation state, while V and Nb cations possess 5+ oxidation state in tetrahedral coordination. Moreover, the Fourier-transform infrared (FTIR) spectra indicate that the Nb substitution give origin to some additional IR modes owing to the deformation of the VO$_4$$^{3-}$ tetrahedra and mixing of monoclinic and tetragonal phases. The photoluminescence measurements on these samples exhibit broadband spectra and their deconvolution designate the availability of more than one electron-hole pairs recombination center.
description: submitted
Photon polarization from helicity suppression in radiative decays of polarized Lambda_b to spin-3/2 baryons
Creators: name: Hiller, G.
name: Knecht, M.
name: Legger, F.
name: Schietinger, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We give a general parameterization of the Lambda_b --> Lambda(1520) gamma decay amplitude, applicable to any strange isosinglet spin-3/2 baryon, and calculate the branching fraction and helicity amplitudes. Large-energy form factor relations are worked out, and it is shown that the helicity-3/2 amplitudes vanish at lowest order in soft-collinear effective theory (SCET). The suppression can be tested experimentally at the LHC and elsewhere, thus providing a benchmark for SCET. We apply the results to assess the experimental reach for a possible wrong-helicity b --> s gamma dipole coupling in Lambda_b --> Lambda(1520) gamma --> p K gamma decays. Furthermore we revisit Lambda_b-polarization at hadron colliders and update the prediction from heavy-quark effective theory. Opportunities associated with b --> d gamma afforded by high-statistics Lambda_b samples are briefly discussed in the general context of CP and flavour violation.
description: elsart, 15 pages, 1 figure; final version as published in Phys. Lett. B
Analysis of Magnetohydrodynamic Perturbations in Radial-field Solar Wind from Parker Solar Probe Observations
Creators: name: Zhao, S. Q.
name: Yan, Huirong
name: Liu, Terry Z.
name: Liu, Mingzhe
name: Shi, Mijie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We report analysis of sub-Alfvénic magnetohydrodynamic (MHD) perturbations in the low-\b{eta} radial-field solar wind using the Parker Solar Probe spacecraft data from 31 October to 12 November 2018. We calculate wave vectors using the singular value decomposition method and separate the MHD perturbations into three types of linear eigenmodes (Alfvén, fast, and slow modes) to explore the properties of the sub-Alfvénic perturbations and the role of compressible perturbations in solar wind heating. The MHD perturbations there show a high degree of Alfvénicity in the radial-field solar wind, with the energy fraction of Alfvén modes dominating (~45%-83%) over those of fast modes (~16%-43%) and slow modes (~1%-19%). We present a detailed analysis of a representative event on 10 November 2018. Observations show that fast modes dominate magnetic compressibility, whereas slow modes dominate density compressibility. The energy damping rate of compressible modes is comparable to the heating rate, suggesting the collisionless damping of compressible modes could be significant for solar wind heating. These results are valuable for further studies of the imbalanced turbulence near the Sun and possible heating effects of compressible modes at MHD scales in low-\b{eta} plasma.
description: 17 pages, 8 figures, accepted for publication in ApJ
GIARPS High-resolution Observations of T Tauri stars (GHOsT): toward a complete characterization of the YSOs in the star forming region
Creators: name: Gangi, Manuele
name: Antoniucci, Simone
name: Nisini, Brunella
name: Biazzo, Katia
name: Giannini, Teresa
name: Alcalà, Juan Manuel
name: Frasca, Antonio
name: Harutyunyan, Avet
name: Manara, Carlo Felice
name: Munari, Ulisse
name: Vitali, Fabrizio
Publisher: name: Zenodo
Year: 2021
Subjects: pre-main sequence stars
winds
high-resolution spectroscopy

description: T Tauri stars of the Taurus-Auriga region represent a paradigmatic sample for low-mass star and planet formation studies. However, a systematic analysis of the Taurus population with the goal of accurately and simultaneously deriving all the relevant source parameters is still missing. To bridge this gap we have started our project GHOsT at TNG (GIARPS High-resolution Observations of T Tauri stars), which combines high-spectral resolution in the optical and near-IR offered by HARPS-N and GIANO, and whose goal is to determine for the first time in a statistically significant, homogeneous, and self-consistent way, stellar parameters and accretion/ejection properties of Classical T Tauri (CTT) stars.
 Here we focus in particular on the characterization of the atomic and molecular winds in the current GHOsT sample consisting of 36 CTTs with a statistical analysis of the kinematic properties of the [OI] 630 nm and H2 2.12 μm lines.
Unresolved Binary Stars Cause an Observed Mass Dependent Age Gradient in Upper Scorpius
Creators: name: Sullivan, Kendall
name: Kraus, Adam
Publisher: name: Zenodo
Year: 2021
Subjects: Young stars
Stellar systems, clusters, and associations
Binary stars

description: Young stellar associations represent a key site for the study of star formation, but to accurately compare observations to models of stellar evolution, the age of an association must be determined. The Upper Scorpius star-forming region is the youngest section of the Scorpius-Centaurus OB association, which is the largest collection of nearby, young, low-mass stars. The true age of Upper Scorpius is not clear, and an observed mass-dependent age gradient in Upper Scorpius, as well as in other star-forming regions, complicates age measurements. We have conducted a synthetic red-optical low-resolution spectroscopic survey of a simulated analog to the Upper Scorpius star-forming region to investigate the effects of unresolved binary stars on age measurements of a stellar population. We find that the observed mass-dependent age gradient in Upper Scorpius can be explained by a population of undetected binary stars. For a simulated population with an age of 10 (RMS = 2) Myr, we measure an age of 10.5 (RMS = 3.5) Myr for F stars, and 7.5 (RMS = 5.8) Myr for M stars. This discrepancy is caused by the mass-dependent mass ratio distribution and the variable steepness of the mass-luminosity relation. Our results support the previously suggested 10 Myr age for Upper Sco, with a small intrinsic age spread.
description: {"references": ["Dotter, A. 2016, ApJS, 222, 8", "Pecaut, M., et al. 2012, ApJ, 746, 154", "Pecaut, M.; Mamajek, E., 2016, MNRAS. 461, 1", "Preibisch, T., et al. 2002, AJ, 124, 1", "Slesnick, C., et al. 2008, ApJ, 688, 1", "Rizzuto, A., et al. 2015, MNRAS, 448, 3"]}
ทัศนะของนักศึกษาที่มีต่อการจัดการเรียนการสอนวิชาคอมพิวเตอร์ ของคณะวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยราชภัฏสวนสุนันทา
Creators: name: สุพรรษา แป้นกลัด
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2555
Subjects: ทัศนะของนักศึกษา การจัดการเรียนการสอน วิชาคอมพิวเตอร์

description: 2, 8, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Optimal designs which are efficient for lack of fit tests
Creators: name: Bischoff, Wolfgang
name: Miller, Frank
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62J05, 62F05 (Primary) 62F05 (Secondary)

description: Linear regression models are among the models most used in practice, although the practitioners are often not sure whether their assumed linear regression model is at least approximately true. In such situations, only designs for which the linear model can be checked are accepted in practice. For important linear regression models such as polynomial regression, optimal designs do not have this property. To get practically attractive designs, we suggest the following strategy. One part of the design points is used to allow one to carry out a lack of fit test with good power for practically interesting alternatives. The rest of the design points are determined in such a way that the whole design is optimal for inference on the unknown parameter in case the lack of fit test does not reject the linear regression model. To solve this problem, we introduce efficient lack of fit designs. Then we explicitly determine the $\mathbf{e}_k$-optimal design in the class of efficient lack of fit designs for polynomial regression of degree $k-1$.
description: Published at http://dx.doi.org/10.1214/009053606000000597 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Scaling of Magnetic Dissipation and Particle Acceleration in ABC Fields
Creators: name: Chen, Qiang
name: Nalewajko, Krzysztof
name: Mishra, Bhupendra
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Using particle-in-cell (PIC) numerical simulations with electron-positron pair plasma, we study how the efficiencies of magnetic dissipation and particle acceleration scale with the initial coherence length $λ_0$ in relation to the system size $L$ of the two-dimensional (2D) `Arnold-Beltrami-Childress' (ABC) magnetic field configurations. Topological constraints on the distribution of magnetic helicity in 2D systems, identified earlier in relativistic force-free (FF) simulations, that prevent the high-$(L/λ_0)$ configurations from reaching the Taylor state, limit the magnetic dissipation efficiency to about $ε_{\rm diss} \simeq 60\%$. We find that the peak growth time scale of the electric energy $τ_{\rm E,peak}$ scales with the characteristic value of initial Alfven velocity $β_{\rm A,ini}$ like $τ_{\rm E,peak} \propto (λ_0/L)β_{\rm A,ini}^{-3}$. The particle energy change is decomposed into non-thermal and thermal parts, with non-thermal energy gain dominant only for high initial magnetisation. The most robust description of the non-thermal high-energy part of the particle distribution is that the power-law index is a linear function of the initial magnetic energy fraction.
description: Published in Journal of Plasma Physics, 17 pages, 7 figures, 1 table
A Deep Learning Approach to photospheric Parameters of CARMENES Target Stars
Creators: name: Passegger, Vera Maria
name: Ordieres-Meré, Joaquin
name: Bello-García, Antonio
name: Caballero, José Antonio
name: Schweitzer, Andreas
name: Amado, Pedro J.
name: González-Marcos, Ana
name: Ribas, Ignasi
name: Reiners, Ansgar
name: Quirrenbach, Andreas
name: Sarro, Luis M.
name: Solano, Enrique
name: Azzaro, Marco
name: Bauer, Florian F.
name: Béjar, Victor J. S.
name: Cortés-Contreras, Miriam
name: Dreizler, Stefan
name: Hatzes, Artie P.
name: Henning, Thomas
name: Jeffers, Sandra V.
name: Kaminski, Adrian
name: Kürster, Martin
name: Lafarga, Marina
name: Marfil, Emilio
name: Montes, David
name: Morales, Juan Carlos
name: Nagel, Evangelos
name: Tabernero, Hugo M.
name: Zechmeister, Mathias
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence

description: We construct an individual convolutional neural network architecture for each of the four stellar parameters effective temperature (Teff), surface gravity (log g), metallicity [M/H], and rotational velocity (v sin i). The networks are trained on synthetic PHOENIX-ACES spectra, showing small training and validation errors. We apply the trained networks to the observed spectra of 283 M dwarfs observed with CARMENES. Although the network models do very well on synthetic spectra, we find large deviations from literature values especially for metallicity, due to the synthetic gap.
description: {"references": ["Passegger et al. (2020) arXiv:2008.01186", "Husser et al. (2013) arXiv:1303.5632", "Passegger et al. (2019) arXiv:1907.00807", "Maldonado et al. (2015) arXiv:1503.03010", "Rojas-Ayala et al. (2012) arXiv:1112.4567", "Gaidos & Mann (2014) arXiv:1406.4071", "Mann et al. (2015) arXiv:1501.01635"]}
PT-symmetric quartic anharmonic oscillator and position-dependent mass in a perturbative approach
Creators: name: Bagchi, B.
name: Banerjee, A.
name: Quesne, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: To lowest order of perturbation theory we show that an equivalence can be established between a $\cal PT$-symmetric generalized quartic anharmonic oscillator model and a Hermitian position-dependent mass Hamiltonian $h$. An important feature of $h$ is that it reveals a domain of couplings where the quartic potential could be attractive, vanishing or repulsive. We also determine the associated physical quantities.
description: 8 pages, no figure, to appear in special issue of Czech. J. Phys
ทัศนะของนิสิตแพทย์ต่อการจัดกิจกรรมเสริมหลักสูตรคณะแพทยศาสตร์ มหาวิทยาลัยศรีนครินทรวิโรฒ
Creators: name: สายรุ้ง ตรีสงฆ์
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2555
Subjects: ทัศนะของนิสิตแพทย์,กิจกรรมเสริมหลักสูตร

description: 2, 8, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
On the Ground State of QCD inside a Compact Stellar Object
Creators: name: Casalbuoni, Roberto
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We describe the effects of the strange quark mass and of the color and electric neutrality on the superconducing phases of QCD.
description: Invited talk at the 2006 International Workshop SCGT 06 "Origin of Mass and Strong Coupling Gauge Theories" 21-24 November 2006, Nagoya, Japan. Latex file 15 pages. 6 figures
Χρηματοοικονομική ανάλυση και ανάλυση μετοχών στον πετρελαϊκό κλάδο
Creators: name: Χατζής, Δημήτριος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: ΕΛΠΕ (Ελληνικά Πετρέλαια)
ΜΟΗ (Motor Oil Hellas)
ΕΛΙΝΟΙΛ
Eni
Galp
ARIMA (Autoregressive Integrated Moving Average)

description: Η παρούσα διπλωματική εργασία αποσκοπεί στην διεξαγωγή αναλύσεων που έχουν ως στόχο να παράσχουν μια συνολική εικόνα για την οικονομική απόδοση και την απόδοση των μετοχών των επιχειρήσεων που δραστηριοποιούνται στον κλάδο πετρελαίου στην Ελλάδα, αλλά και στην περιοχή της Μεσογείου. Στο 1ο μέρος της εργασίας πραγματοποιείται διαχρονική και διαστρωματική χρηματοοικονομική ανάλυση στις εταιρίας ΕΛΛΗΝΙΚΑ ΠΕΤΡΕΛΑΙΑ, ΜΟΤΟΡ ΟΪΛ, ΕΛΙΝΟΙΛ, Eni S.p.A και Galp Energia SGPS SA. Οι αναλύσεις αυτές παρέχουν μια σαφή εικόνα για πολλές οικονομικές διαστάσεις της εκάστοτε επιχείρησης. Ακόμη αναδεικνύουν ομοιότητες και διαφορές τόσο μεταξύ των ελληνικών εταιριών, όσο και μεταξύ των ελληνικών εταιριών και των εταιριών Eni και Galp Energia, οι οποίες αποτελούν εταιρίες που εδρεύουν σε μεσογειακές χώρες που χαρακτηρίζονται από ένα εξίσου ευάλωτο οικονομικό περιβάλλον με αυτό της Ελλάδας. Στο 2ο μέρος πραγματοποιείται περιγραφική στατιστική των μετοχών των προαναφερθέντων εταιριών και πραγματοποιείται διαχρονική ανάλυση του κινδύνου και της ιστορικής απόδοσης της εκάστοτε μετοχής. Τέλος διεξάγονται έλεγχοι στασιμότητας και ετεροσκεδαστικότητας στις αποδόσεις των μετοχών και αναδεικνύονται τα αυτοπαλίνδρομα οικονομετρικά μοντέλα κινητού μέσου όρου δεσμευμένης ετεροσκεδαστικότητας (ARIMA-GARCH) που φέρουν την καλύτερη προβλεπτική ικανότητα.
description: The purpose of this thesis is to conduct an analysis, which has as main purpose to produce an overall image of the financial performance and the stock performance of companies who are active on the petroleum sector in Greece, and also in the Mediterranean region. In the first part of the thesis a time-series and a comparative financial analysis is performed in the companies Hellenic Petroleum, Motor Oil, elin, Eni S.p.A and Galp Energia SGPS SA. These analyzes provide a clear image of various economic dimensions of each company. Yet they highlight the similarities and differences among the greek companies and between the greek companies and the companies Eni and Galp, which are companies based in Mediterranean countries which are characterized by an equally vulnerable economic environment with that of Greece. In the second part the descriptive statistics of the shares of the companies mentioned before are conducted and also a time-series analysis of the historical performance and the risk of each share is performed. Lastly tests of stationarity and heteroskedasticity are conducted in the performances of the shares and the autoregressive econometric model with moving average conditional Heteroskedasticity (ARIMA-GARCH) with the best forecasting ability is provided.
ความคิดเห็นของนักศึกษาต่อการให้บริการของกองบริการการศึกษาสถาบันบัณฑิตพัฒนศิลป์
Creators: name: แสงแข โคละทัต
name: อัจฉรา วัฒนาณรงค์
name: จารุวรรณ สกุลคู
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2555
Subjects: การให้บริการ,กองบริการการศึกษา

description: 2, 8, วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์
Non-universality of commonly used correlation-energy density functionals
Creators: name: Katriel, Jacob
name: Roy, Sudip
name: Springborg, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The correlation energies of the helium isoelectronic sequence and of Hooke's atom isoelectronic sequence have been evaluated using an assortment of local, gradient and meta-gradient density functionals. The results are compared with the exact correlation energies, showing that while several of the more recent density functionals reproduce the exact correlation energies of the helium isoelectronic sequence rather closely, none is satisfactory for Hooke's atom isoelectronic sequence. It is argued that the uniformly acceptable results for the helium sequence can be explained through simple scaling arguments that do not hold for Hooke's atom sequence, so that the latter system provides a more sensitive testing ground for approximate density functionals. This state of affairs calls for further effort towards formulating correlation-energy density functionals that would be truly universal at least for spherically-symmetric two-fermion systems.
description: To appear in J. Chem. Phys
Trapping of two-component matter-wave solitons by mismatched optical lattices
Creators: name: Shi, Z.
name: Kevrekidis, K. J. H. Law P. G.
name: Malomed, B. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We consider a one-dimensional model of a two-component Bose-Einstein condensate in the presence of periodic external potentials of opposite signs, acting on the two species. The interaction between the species is attractive, while intra-species interactions may be attractive too [the system of the right-bright (BB) type], or of opposite signs in the two components [the gap-bright (GB) model]. We identify the existence and stability domains for soliton complexes of the BB and GB types. The evolution of unstable solitons leads to the establishment of oscillatory states. The increase of the strength of the nonlinear attraction between the species results in symbiotic stabilization of the complexes, despite the fact that one component is centered around a local maximum of the respective periodic potential.