cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Spatial Distribution of the Galactic First Stars I: High-Resolution N-body Approach
Creators: name: Scannapieco, Evan
name: Kawata, Daisuke
name: Brook, Chris B.
name: Schneider, Raffaella
name: Ferrara, Andrea
name: Gibson, Brad K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the spatial distribution of Galactic metal-free stars by combining an extremely high-resolution (7.8 X 10^5 solar masses per particle) Cold Dark Matter N-body simulation of the Milky-Way with a semi-analytic model of metal enrichment. This approach allows us to resolve halos with virial temperatures down to the 10^4K atomic cooling limit, and it is sufficiently flexible to make a number of robust conclusions, despite the extremely uncertain properties of the first stars. Galactic metal-free stars are formed over a large redshift range, which peaks at z~10, but continues down to z~5, contributing stars at wide range of Galactocentric radii. Stars containing only metals generated by primordial stars are similarly widespread. Neither changing the efficiency of metal dispersal by two orders of magnitude, nor drastically changing the approximations in our semi-analytical model can affect these result. Thus, if they have sufficiently long lifetimes, a significant number of stars formed in initially primordial star clusters should be found in the nearby Galactic halo regardless of the specifics of metal-free star formation. Observations of metal abundances in Galactic halo stars should be taken as directly constraining the properties of primordial stars, and the lack of metal-free halo stars today should be taken as strongly suggesting a 0.8 solar mass lower limit on the primordial initial mass function.
description: 17 Pages, ApJ, in Press. Higher resolution version available here: http://www.ociw.edu/~dkawata/for/evan/draft/final/ms.pdf
Μελέτη της συμπεριφοράς ανιχνευτών μιονίων στο πείραμα ATLAS για τον ακριβή προσδιορισμό της ορμής τους και η συμβολή της στην φυσική του καθιερωμένου προτύπου
Creators: name: Κρεπούρη, Αθανασία Σ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2006
Subjects: ΑΤΛΑΣ
Ανιχνευτές μιονίων
ATLAS
BIS

description: Στην παρούσα διατριβή πραγματοποιήθηκε μελέτη της συμπεριφοράς των ανιχνευτών μιονίων του πειράματος ATLAS, οι οποίοι θα χρησιμοποιηθούν για τον προσδιορισμό με μεγάλη ακρίβεια της ορμής των μιονίων. Η ακρίβεια στη μέτρηση της ορμής αποτελεί απαραίτητη προϋπόθεση για την ανακάλυψη του μποζονίου Higgs με μιόνια στην τελική κατάσταση. Η παρούσα διατριβή επικεντρώνεται στους εξής παράγοντες που καθορίζουν την μέτρηση της ορμής: ακρίβεια κατασκευής των ανιχνευτών, χωρική διακριτική ικανότητα και ακρίβεια στην ευθυγράμμισή τους, καθώς και στον υπολογισμό της απόδοσης στην ανίχνευση μιονίων και στην ανακατασκευή των τροχιών τους. Αρχικά αναπτύχθηκε μέθοδος στο ΑΠΘ για την κατασκευή των ανιχνευτών σύμφωνα με τις προδιαγραφές ακρίβειας του πειράματος. Στη συνέχεια εγκαταστάθηκε στο ΑΠΘ πειραματική διάταξη για τη μελέτη των χαρακτηριστικών ενός ανιχνευτή και μετρήθηκαν η χωρική διακριτική ικανότητα και η απόδοσή τους. Τέλος μελετήθηκε η συμπεριφορά του φασματομέτρου μιονίων με μιόνια από ελεγχόμενες δέσμες στο CERN και υπολογίστηκε η απόδοση στην ανακατασκευή τροχιών και η συμβολή της ευθυγράμμισης των ανιχνευτών στην ακρίβεια προσδιορισμού της ορμής. Οι εν λόγω ανιχνευτές πληρούν τις απαιτούμενες προδιαγραφές και οι προτεινόμενες μέθοδοι στην ανακατασκευή των τροχιών και την ευθυγράμμισή τους διασφαλίζουν την απαιτούμενη ακρίβεια στην μέτρηση της ορμής
description: In this thesis the performance of the tracking muon detectors of the ATLAS experiment was studied. The specific detectors will provide the measurement of the muon momentum. The precision in the momentum measurement is a key factor for the discovery of the Higgs boson with muons in the final state. The thesis focuses on the following contributions to the precision of the muon momentum measurement: mechanical chamber precision in construction, spatial resolution and alignment of the chambers as well as on the calculation of the efficiency of the muon detection and the track reconstruction. A method has been developed at AUTh for the construction of the detectors according to specifications. A cosmic ray stand has been setup at the University of Thessaloniki in order to study the detector performance. The spatial resolution and the detector efficiency were calculated with cosmic ray muons. Finally the performance of the muon spectrometer was studied using test beam muons at CERN. The track reconstruction efficiency and the alignment contribution to the precision of the muon momentum measurements were calculated. The muon detectors are within the specifications and the proposed methods for track reconstruction and chamber alignment corrections guarantee the required precision of the muon momentum measurement
Nonclassical correlation in a multipartite quantum system: two measures and evaluation
Creators: name: SaiToh, Akira
name: Rahimi, Robabeh
name: Nakahara, Mikio
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: There is a commonly recognized paradigm in which a multipartite quantum system described by a density matrix having no product eigenbasis is considered to possess nonclassical correlation. Supporting this paradigm, we define two entropic measures of nonclassical correlation of a multipartite quantum system. One is defined as the minimum uncertainty about a joint system after we collect outcomes of particular local measurements. The other is defined by taking the maximum over all local systems about the minimum distance between a genuine set and a mimic set of eigenvalues of a reduced density matrix of a local system. The latter measure is based on an artificial game to create mimic eigenvalues of a reduced density matrix of a local system from eigenvalues of a density matrix of a global system. Numerical computation of these measures for several examples is performed.
description: v1: 10 pages, 8 figures, IOPART, v2: introduction modified, figure 7 replaced, v3: 10 pages, 10 figures, RevTeX4, major revision with an additional measure introduced, title changed (previous title: Non-classical correlation in a multi-partite quantum system reconsidered), to appear in Phys. Rev. A
The role of the Rayleigh-Taylor instability in ram pressure stripped disk galaxies
Creators: name: Roediger, E.
name: Hensler, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Ram pressure stripping, i.e. the removal of a galaxy's gas disk due to its motion through the intracluster medium of a galaxy cluster, appears to be a common phenomenon. Not every galaxy, however, is completely stripped of its gas disk. If the ram pressure is insufficiently strong, only the outer parts of the gas disk are removed, and the inner gas disk is retained by the galaxy. One example of such a case is the Virgo spiral NGC 4402. Observations of NGC 4402 (Crowl et al. 2005) reveal structures at the leading edge of the gas disk, which resemble the characteristic finger-like structures produced by the Rayleigh-Taylor (RT) instability. We argue, however, that the RT instability is unlikely to be responsible for these structures. We demonstrate that the conditions under which a galaxy's disk gas experiences ram pressure stripping are identical to those that lead to RT instability. If the galaxy's gravity prevents ram pressure stripping of the inner disk, it also prevents the RT instability. In contrast, the stripped gas could still be subject to RT instability, and we discuss consequences for the stripped gas.
description: accepted by A&A
New neutron detector based on Micromegas technology for ADS projects
Creators: name: Andriamonje, Samuel
name: Andriamonje, Gregory
name: Aune, Stephan
name: Ban, Gilles
name: Breaud, Stephane
name: Blandin, Christophe
name: Ferrer, Esther
name: Geslot, Benoit
name: Giganon, Arnaud
name: Giomataris, Ioannis
name: Jammes, Christian
name: Kadi, Yacine
name: Laborie, Philippe
name: Lecolley, Jean Francois
name: Pancin, Julien
name: Riallot, Marc
name: Rosa, Roberto
name: Sarchiapone, Lucia
name: Steckmeyer, Jean Claude
name: Tillier, Joel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A new neutron detector based on Micromegas technology has been developed for the measurement of the simulated neutron spectrum in the ADS project. After the presentation of simulated neutron spectra obtained in the interaction of 140 MeV protons with the spallation target inside the TRIGA core, a full description of the new detector configuration is given. The advantage of this detector compared to conventional neutron flux detectors and the results obtained with the first prototype at the CELINA 14 MeV neutron source facility at CEA-Cadarache are presented. The future developments of operational Piccolo-Micromegas for fast neutron reactors are also described.
description: 5 pages, 7 figures, AccApp05 Conference
Supercontinuum generation of ultrashort laser pulses in air at different central wavelengths
Creators: name: Skupin, S.
name: Berge, L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Supercontinuum generation by femtosecond filaments in air is investigated for different laser wavelengths ranging from ultraviolet to infrared. Particular attention is paid on the role of third-harmonic generation and temporal steepening effects, which enlarge the blue part of the spectrum. A unidirectional pulse propagation model and nonlinear evolution equations are numerically integrated and their results are compared. Apart from the choice of the central wavelength, we emphasize the importance of the saturation intensity reached by self-guided pulses, together with their temporal duration and propagation length as key players acting on both supercontinuum generation of the pump wave and emergence of the third harmonics. Maximal broadening is observed for large wavelengths and long filamentation ranges.
description: 10 pages, 11 figures
The Position of Sagittarius A*: III. Motion of the Stellar Cusp
Creators: name: Reid, M. J.
name: Menten, K. M.
name: Trippe, S.
name: Ott, T.
name: Genzel, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the first two papers of this series, we determined the position of Sgr A* on infrared images, by aligning the positions of red giant stars with positions measured at radio wavelengths for their circumstellar SiO masers. In this paper, we report detections of 5 new stellar SiO masers within 50" (2 pc) of Sgr A* and new and/or improved positions and proper motions of 15 stellar SiO masers. The current accuracies are ~1 mas in position and ~0.3 mas/y in proper motion. We find that the proper motion of the central stellar cluster with respect to Sgr A* is less than 45 km/s. One star, IRS 9, has a three-dimensional speed of ~370 km/s at a projected distance of 0.33 pc from Sgr A*. If IRS 9 is bound to the inner parsec, this requires an enclosed mass that exceeds current estimates of the sum of the mass of Sgr A* and luminous stars in the stellar cusp by ~0.8 x 10^6 Msun. Possible explanations include i) that IRS 9 is not bound to the central parsec and has "fallen" from a radius greater than 9 pc, ii) that a cluster of dark stellar remnants accounts for some of the excess mass, and/or iii) that Ro is considerably greater than 8 kpc.
description: 27 pages including 5 figures and 4 tables
Getting away with it: the erotic thriller and its fantasies
Creators: name: Καραγιαννίδου, Ανέτα Μ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2006
Subjects: Ερωτικό θρίλερ
Τριγωνισμός/Λακανική θεωρία
Erotic thriller
Tringualation/Lananian theory

description: Στην διδακτορική μου διατριβή, χρησιμοποιώντας το πρίσμα της Λακανικής ψυχανάλυσης εξερευνώ το κινηματογραφικό είδος του ερωτικού θρίλερ σε σχέση με τα φαντασιακά αντικείμενα που αυτό παράγει. Στο πρώτο μέρος της διατριβής μου επιχειρώ να ορίσω το ερωτικό θρίλερ ως κινηματογραφικό είδος. Με απόλυτη συνείδηση της δυσκολίας οποιουδήποτε ορισμού στο μεταμοντέρνο Νέο Χόλιγουντ των υβριδίων προσπαθώ να δώσω στον αναγνώστη μια ματιά στον πυρήνα του είδους, ενώ αυτό έχει ήδη επιδοθεί σε νέες μεταλλάξεις. Στο δεύτερο μέρος τοποθετούμαι στην σύγχρονη μεταμοντέρνα εικονο-κατεχόμενη πολιτισμική σκηνή για να ερευνήσω στη συνέχει το ψυχαναλυτικό πλαίσιο της φαντασιωνόμενου υποκειμένου/θεατή. Επειτα, στο τρίτο μέρος μελετώ τους τρόπους με τους οποίους το ερωτικό θρίλερ ενσωματώνει τους μηχανισμούς της Λακανικής φαντσίωσης προεκιμένου να προσφέρει ευχαρίστηση στους θεατούς. Τέλος, κλείνω τη διατριβή μου με ένα πρόσφατο "μετά-θάνατον" δείγμα του είδους : το "Βασικό Ενστικτο 2" του Michael Caton(2006). Η ταινία αυτή αποδεικνύει την εξαφάνιση του ερωτικού θρίλερ στο Νέο Χόλιγουντ του 21ου αιώνα και την αποτυχία οποιουδήποτε ερωτικού θρίλερ αψηφά τις επιταγές του μηχανισμού φαντασίωσης που το είδος υιοθετεί
description: In my PhD thesis employing the lens of Lacanian phychoanalysis i explore the gilmic genre of the erotic thriller in relation to the fantasy-objects it produces. In the first part ofd the thesis i attempt a definition of the erotic thriller as genre. Accomodating the slipperiness of any generic delimination, i try to offer a glimpse at the thesis i set off from an image-saturated postmodern milieu to investigate the psychoanalytic frame of fantasy and the fantasizing subject/spectator. Then in the third part i explore the ways in which the erotic thriller incorporates the mechamics of the Lacanian fantasy to appeal toi spectators. Finally, i close my dissertation with a post-mortem instance of the genre : Michael Caton Jone's 2006 "Basic Instinct 2", a film whose failure i read as symptomatic of the genre's demise in the 21st century and of the film's defiance of what i have defined as the erotic thriller fantasy-directives
Mapping the in-plane electric field inside irradiated diodes
Creators: name: Poley, L.
name: Blue, A. J.
name: Buttar, C.
name: Cindro, V.
name: Darroch, C.
name: Fadeyev, V.
name: Fernandez-Tejero, J.
name: Fleta, C.
name: Helling, C.
name: Labitan, C.
name: Mandić, I.
name: Santpur, S. N.
name: Sperlich, D.
name: Ullán, M.
name: Unno, Y.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A significant aspect of the Phase-II Upgrade of the ATLAS detector is the replacement of the current Inner Detector with the ATLAS Inner Tracker (ITk). The ATLAS ITk is an all-silicon detector consisting of a pixel tracker and a strip tracker. Sensors for the ITk strip tracker have been developed to withstand the high radiation environment in the ATLAS detector after the High Luminosity Upgrade of the Large Hadron Collider at CERN, which will significantly increase the rate of particle collisions and resulting particle tracks. During their operation in the ATLAS detector, sensors for the ITk strip tracker are expected to accumulate fluences up to 1.6 x 10^15 n_eq/cm^2 (including a safety factor of 1.5), which will significantly affect their performance. One characteristic of interest for highly irradiated sensors is the shape and homogeneity of the electric field inside its active area. For the results presented here, diodes with edge structures similar to full size ATLAS sensors were irradiated up to fluences comparable to those in the ATLAS ITk strip tracker and their electric fields mapped using a micro-focused X-ray beam (beam diameter 2x3 μm^2). This study shows the extension and shape of the electric field inside highly irradiated diodes over a range of applied bias voltages. Additionally, measurements of the outline of the depleted sensor areas allow a comparison of the measured leakage current for different fluences with expectations for the corresponding active areas.
description: published in the proceedings of the 12th International "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors (HSTD12)
Selected Topics in Top Quark Physics
Creators: name: Körner, J. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I discuss three different selected topics in top quark physics. The first topic concerns the next-to-next-to-leading order calculation of the hadroproduction of top quark pairs and the role of multiple polylogarithms in this calculation. I report on an ongoing next-to-next-to-leading order calculation of heavy quark pair production in hadron collisions where the loop--by--loop part of the calculation is about to be completed. Calculating the loop-by-loop part allows one to take a glimpse at the mathematical structure of the full NNLO calculation. The loop-by-loop contributions bring in a new class of functions introduced only eight years ago by the Russian mathematician Goncharov called multiple polylogarithms. The second topic concerns a next-to-leading order calculation of unpolarized top quark decays which are analyzed in cascade fashion $t \to b + W^+$ followed by $W^+ \to l^+ + ν_l$. Finally, I present some next-to-leading order results on polarized top quark decays which are analyzed in the top quark rest system.
description: 11 pages, 4 figures, Invited talk given at the 12th Regional Conference of Mathematical Physics, Islamabad, Pakistan, March 2006, to be published in the proceedings
Teachers as curriculum planners in science : a case study of a primary teaching team
Creators: name: Platt, Rita Dalgaard
Publisher: name: University of British Columbia
Year: 2011

description: Efforts to improve the quality of schools and to create rich and productive learning environments for all children have historically been a continuous ebb and flow of planned change, innovations and reforms. The purpose of this study was to examine how a team of three teachers worked collaboratively to plan, develop and present a science unit of study to their "family grouped" students. The inferred intent of the Year 2000 initiatives seems to recognize the power and the potential in the experience of the classroom teacher. It recognizes not only the teacher's ability to work collaboratively in a team but also to be the curriculum planner and facilitator of learning experiences. This study examines three phases of curriculum development: the pre-instructional planning and creation of Science Discovery Boxes for primary children; the instructional phase of actual classroom activities; and the evaluation and reflections by the teaching team on their curriculum planning and translation experience. The findings of the study emphasize the importance these teachers place on collaborative team work as they outline numerous personal qualities that are essential for collaborative work. The findings also indicate that the teachers were involved in a change process prior to the Provincial implementation initiatives indicating the need for a shift in educational paradigms. The study suggests that greater in-service in science education be provided for teachers with the same vigor as given to other subject areas such as Language Arts, and that greater recognition be given to the role that everyone's life experiences play in personal and professional growth and change processes that are a complex and valuable component in the lives of teachers.
คำขยายบอกลักษณะการรับรู้ทางประสาทสัมผัสทั้ง 5 ในภาษาไทย
Creators: name: นนทิยา จันทร์เนตร์
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏบุรีรัมย์
Year: 2557
Subjects: คำขยาย, การรับรู้ทางประสาทสัมผัสทั้ง 5

description: 2, 12, รมยสาร
Local commutativity versus Bell inequality violation for entangled states and versus non-violation for separable states
Creators: name: Seevinck, Michael
name: Uffink, Jos
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: By introducing a quantitative `degree of commutativity' in terms of the angle between spin-observables we present two tight quantitative trade-off relations in the case of two qubits: First, for entangled states, between the degree of commutativity of local observables and the maximal amount of violation of the Bell inequality: if both local angles increase from zero to π/2 (i.e., the degree of local commutativity decreases), the maximum violation of the Bell inequality increases. Secondly, a converse trade-off relation holds for separable states: if both local angles approach π/2 the maximal value obtainable for the correlations in the Bell inequality decreases and thus the non-violation increases. As expected, the extremes of these relations are found in the case of anti-commuting local observables where respectively the bounds of 2\sqrt{2} and \sqrt{2} hold for the expectation of the Bell operator. The trade-off relations show that non-commmutativity gives ``a more than classical result" for entangled states, whereas "a less than classical result" is obtained for separable states. The experimental relevance of the trade-off relation for separable states is that it provides an experimental test for two qubit entanglement. Its advantages are twofold: in comparison to violations of Bell inequalities it is a stronger criterion and in comparison to entanglement witnesses it needs to make less strong assumptions about the observables implemented in the experiment.
description: V2: Most important change: we have greatly extended the discussion of the theoretical and experimental relevance of the results. v3: Published version
Non Thermal Equilibrium States of Closed Bipartite Systems
Creators: name: Schmidt, Harry
name: Mahler, Guenter
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate a two-level system in resonant contact with a larger environment. The environment typically is in a canonical state with a given temperature initially. Depending on the precise spectral structure of the environment and the type of coupling between both systems, the smaller part may relax to a canonical state with the same temperature as the environment (i.e. thermal relaxation) or to some other quasi equilibrium state (non thermal relaxation). The type of the (quasi) equilibrium state can be related to the distribution of certain properties of the energy eigenvectors of the total system. We examine these distributions for several abstract and concrete (spin environment) Hamiltonian systems, the significant aspect of these distributions can be related to the relative strength of local and interaction parts of the Hamiltonian.
description: RevTeX, 8 pages, 13 figures
บทปริทัศน์หนังสือ (Book Review) :  คริส เบเคอร์ และผาสุก พงษ์ไพจิตร. (๒๕๕๗). ประวัติศาสตร์ไทยร่วมสมัย. กรุงเทพฯ: มติชน
Creators: name: สันติภาพ ชารัมย์
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏบุรีรัมย์
Year: 2557
Subjects: ประวัติศาสตร์ไทย, ร่วมสมัย

description: 2, 12, รมยสาร
Zeeman-Tomography of the Solar Photosphere -- 3-Dimensional Surface Structures Retrieved from Hinode Observations
Creators: name: Carroll, T. A.
name: Kopf, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: AIMS :The thermodynamic and magnetic field structure of the solar photosphere is analyzed by means of a novel 3-dimensional spectropolarimetric inversion and reconstruction technique. METHODS : On the basis of high-resolution, mixed-polarity magnetoconvection simulations, we used an artificial neural network (ANN) model to approximate the nonlinear inverse mapping between synthesized Stokes spectra and the underlying stratification of atmospheric parameters like temperature, line-of-sight (LOS) velocity and LOS magnetic field. This approach not only allows us to incorporate more reliable physics into the inversion process, it also enables the inversion on an absolute geometrical height scale, which allows the subsequent combination of individual line-of-sight stratifications to obtain a complete 3-dimensional reconstruction (tomography) of the observed area. RESULTS : The magnetoconvection simulation data, as well as the ANN inversion, have been properly processed to be applicable to spectropolarimetric observations from the Hinode satellite. For the first time, we show 3-dimensional tomographic reconstructions (temperature, LOS velocity, and LOS magnetic field) of a quiet sun region observed by Hinode. The reconstructed area covers a field of approximately 12000 by 12000 km and a height range of 510 km in the photosphere. An enormous variety of small and large scale structures can be identified in the 3-D reconstructions. The low-flux region (B_{mag} = 20G) we analyzed exhibits a number of "tube-like" magnetic structures with field strengths of several hundred Gauss. Most of these structures rapidly loose their strength with height and only a few larger structures can retain a higher field strength to the upper layers of the photosphere.
description: accepted for A&A Letters
SOS - Securing Open Skies
Creators: name: Sciancalepore, Savio
name: Di Pietro, Roberto
Publisher: name: arXiv
Year: 2018
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Automatic Dependent Surveillance - Broadcast (ADS-B) is the next generation communication technology selected for allowing commercial and military aircraft to deliver flight information to both ground base stations and other airplanes. Today, it is already on-board of 80% of commercial aircraft, and it will become mandatory by the 2020 in the US and the EU. ADS-B has been designed without any security consideration --- messages are delivered wirelessly in clear text and they are not authenticated. In this paper we propose Securing Open Skies (SOS), a lightweight and standard-compliant framework for securing ADS-B technology wireless communications. SOS leverages the well-known \muTESLA protocol, and includes some modifications necessary to deal with the severe bandwidth constraints of the ADS-B communication technology. In addition, SOS is resilient against message injection attacks, by recurring to majority voting techniques applied on central community servers. Overall, SOS emerges as a lightweight security solution, with a limited bandwidth overhead, that does not require any modification to the hardware already deployed. Further, SOS is standard compliant and able to reject active adversaries aiming at disrupting the correct functioning of the communication system. Finally, comparisons against state-of-the-art solutions do show the superior quality and viability of our solution.
A Simple Two-Parameter Characterization of Gamma-Ray Burst Time Histories
Creators: name: Hakkila, Jon
name: Giblin, Timothy W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A simple scheme delineates Long GRBs with similar time histories using the Internal Luminosity Function power-law index and the spectral lag. Several generalizations are made about time history morphologies: 1) GRBs with long spectral lags contain fewer pulses that are broader than those found in bursts with short spectral lags, 2) short-lag bursts with small ILF power-law indices have many narrow pulses and are highly variable, while long-lag bursts with small ILF power-law indices are characterized by broad, smooth pulses and have low variability. GRB time history morphologies primarily identify intrinsic rather than extrinsic characteristics based on correlations with gamma-ray luminosity, afterglow luminosity, and numbers of pulses. These characteristics result because internal relativistic effects due to bulk Lorentz factor are larger than cosmological effects, and because the numbers and shapes of pulses indicate different efficiencies and forms of GRB energy release. Single-pulsed GRBs are characterized either by large ILF power indices (indicating a range of jet opening angles and Lorentz factors, with a FRED pulse shape), or they have long lags (large jet opening angles with low Lorentz factors, with either a FRED pulse shape or an unpeaked, smooth pulse shape). They also have lower-luminosity afterglows than multi-pulsed GRBs. GRBs with simple time histories are often associated with Type Ibc supernovae. This suggests that some single-pulsed GRBs contain single, beamed blast waves that are similar to and have characteristics that overlap with those of many supernovae. Such a connection may not exist between multi-pulsed GRBs and supernovae.
description: Accepted for publication in The Astrophysical Journal. 29 pages, 10 figures, 1 table
Distributed linear regression by averaging
Creators: name: Dobriban, Edgar
name: Sheng, Yue
Publisher: name: arXiv
Year: 2018
Subjects: subject: Statistics Theory (math.ST)
subject: Computation (stat.CO)
subject: Methodology (stat.ME)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Distributed statistical learning problems arise commonly when dealing with large datasets. In this setup, datasets are partitioned over machines, which compute locally, and communicate short messages. Communication is often the bottleneck. In this paper, we study one-step and iterative weighted parameter averaging in statistical linear models under data parallelism. We do linear regression on each machine, send the results to a central server, and take a weighted average of the parameters. Optionally, we iterate, sending back the weighted average and doing local ridge regressions centered at it. How does this work compared to doing linear regression on the full data? Here we study the performance loss in estimation, test error, and confidence interval length in high dimensions, where the number of parameters is comparable to the training data size. We find the performance loss in one-step weighted averaging, and also give results for iterative averaging. We also find that different problems are affected differently by the distributed framework. Estimation error and confidence interval length increase a lot, while prediction error increases much less. We rely on recent results from random matrix theory, where we develop a new calculus of deterministic equivalents as a tool of broader interest.
description: Fixing a typo
การศึกษาประสิทธิภาพรูปแบบการฝึกซ้อมทรัมเป็ตของนักเรียนวงโยธวาทิตโรงเรียนสุรนารีวิทยา จังหวัดนครราชสีมา
Creators: name: สุมนัสชนก นาคแท้
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏบุรีรัมย์
Year: 2557
Subjects: รูปแบบการฝึกซ้อม, ทรัมเป็ต, วงโยธวาทิต

description: 2, 12, รมยสาร
LoRD-Net: Unfolded Deep Detection Network with Low-Resolution Receivers
Creators: name: Khobahi, Shahin
name: Shlezinger, Nir
name: Soltanalian, Mojtaba
name: Eldar, Yonina C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The need to recover high-dimensional signals from their noisy low-resolution quantized measurements is widely encountered in communications and sensing. In this paper, we focus on the extreme case of one-bit quantizers, and propose a deep detector entitled LoRD-Net for recovering information symbols from one-bit measurements. Our method is a model-aware data-driven architecture based on deep unfolding of first-order optimization iterations. LoRD-Net has a task-based architecture dedicated to recovering the underlying signal of interest from the one-bit noisy measurements without requiring prior knowledge of the channel matrix through which the one-bit measurements are obtained. The proposed deep detector has much fewer parameters compared to black-box deep networks due to the incorporation of domain-knowledge in the design of its architecture, allowing it to operate in a data-driven fashion while benefiting from the flexibility, versatility, and reliability of model-based optimization methods. LoRD-Net operates in a blind fashion, which requires addressing both the non-linear nature of the data-acquisition system as well as identifying a proper optimization objective for signal recovery. Accordingly, we propose a two-stage training method for LoRD-Net, in which the first stage is dedicated to identifying the proper form of the optimization process to unfold, while the latter trains the resulting model in an end-to-end manner. We numerically evaluate the proposed receiver architecture for one-bit signal recovery in wireless communications and demonstrate that the proposed hybrid methodology outperforms both data-driven and model-based state-of-the-art methods, while utilizing small datasets, on the order of merely $\sim 500$ samples, for training.
การประเมินระบบประกันคุณภาพภายในของโรงเรียนในสังกัดสำนักงานเขตพื้นที่การศึกษามัธยมศึกษาเขต 32
Creators: name: นาฏลัดดา จุลมา
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏบุรีรัมย์
Year: 2557
Subjects: การประเมิน, ประกันคุณภาพภายใน, โรงเรียน

description: 2, 12, รมยสาร
ความสัมพันธ์ระหว่างอัตราส่วนทางการเงิน กับผลตอบแทนที่คาดหมายของบริษัทที่จดทะเบียนในตลาดหลักทรัพย์แห่งประเทศไทย(SET100)
Creators: name: แก้วมณี อุทิรัมย์
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏบุรีรัมย์
Year: 2557
Subjects: อัตราส่วนทางการเงิน, ผลตอบแทนที่คาดหมาย

description: 2, 12, รมยสาร
Variational Monte Carlo analysis of the Hubbard model with a confining potential: one-dimensional fermionic optical lattice systems
Creators: name: Fujihara, Yusuke
name: Koga, Akihisa
name: Kawakami, Norio
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate the one-dimensional Hubbard model with a confining potential, which may describe cold fermionic atoms trapped in an optical lattice. Combining the variational Monte Carlo simulations with the new stochastic reconfiguration scheme proposed by Sorella, we present an efficient method to systematically treat the ground state properties of the confined system with a site-dependent potential. By taking into account intersite correlations as well as site-dependent on-site correlations, we are able to describe the coexistence of the metallic and Mott insulating regions, which is consistent with other numerical results. Several possible improvements of the trial states are also addressed.
description: 7 pages, 15 figures; removed unnecessary graphs (p.8-p.32 in the old version are removed)
การประเมินการบริหารสถานศึกษาขั้นพื้นฐานระดับมัธยมศึกษาในเขตพัฒนาพิเศษเฉพาะกิจจังหวัดชายแดนภาคใต้
Creators: name: ชาตรี ก้อเด็ม
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏบุรีรัมย์
Year: 2557
Subjects: การประเมิน, การบริหารสถานศึกษาขั้นพื้นฐาน, เขตพัฒนาพิเศษเฉพาะกิจ, จังหวัดชายแดนภาคใต้

description: 2, 12, รมยสาร
Het Open Textbook als onderwijsvorm. Workshop SURF Onderwijsdagen 2018
Creators: name: Jong, Michiel De
Publisher: name: Zenodo
Year: 2019
Subjects: open education
OER
open educational practice
open textbook
co-creation

description: Dutch slide deck designed for a workshop on the Open Educational Practice of co-creating a course with students by writing an open textbook. Deze powerpoint presentatie is toegepast in een workshop op de SURF onderwijsdagen in 2018. Deze workshop introduceert twee aspecten van Open Education.: Het open textbook en co-creatie van leermaterialen. Het open textbook is een Open Educational Resource (OER). Het open textbook is dynamische onderwijsliteratuur die gemakkelijk bewerkbaar is door de auteur zelf, maar ook door anderen, naar hete 5R model voor OER van David Wiley. Co-creatie van leermaterialen wordt in deze workshop geintroduceerd, door deelnemers uit te dagen een cursus te ontwerpen waarbij zij als docent samen met hun studenten een open textbook ontwerpen. Dit wordt gedaan aan de hand van een drietal casussen.
แนวทางส่งเสริมสุขภาวะผู้ป่วยภาวะตับวายเรื้อรังด้วยวิธีผสมผสานการแพทย์แผนไทยและการแพทย์แผนปัจจุบัน  โรงพยาบาลพระปกเกล้า จังหวัดจันทบุรี
Creators: name: สุรัสวดี สินวัต
Publisher: name: คณะมนุษยศาสตร์และสังคมศาสตร์ มหาวิทยาลัยราชภัฏบุรีรัมย์
Year: 2557
Subjects: การแพทย์แผนไทย, การแพทย์แผนปัจจุบัน,การแพทย์ผสมผสาน, ภาวะตับวายเรื้อรัง และ แนวทางส่งเสริมสุขภาวะ

description: 2, 12, รมยสาร
Partial Breaking of N=2 Supersymmetry and Decoupling Limit of Nambu-Goldstone Fermion in U(N) Gauge Model
Creators: name: Fujiwara, Kazuhito
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the N=1 U(N) gauge model obtained by spontaneous breaking of N=2 supersymmetry. The Fayet-Iliopoulos term included in the N=2 action does not appear in the action on the N=1 vacuum and the superpotential is modified to break discrete R symmetry. We take a limit in which the Kahler metric becomes flat and the superpotential preserves non-trivial form. The Nambu-Goldstone fermion is decoupled from other fields but the resulting action is still N=1 supersymmetric. It shows the origin of the fermionic shift symmetry in N=1 U(N) gauge theory.
description: 10 pages,revised version to appear in Nuclear Physics B
Limitations for the determination of piezoelectric constants with piezoresponse force microscopy
Creators: name: Jungk, T.
name: Hoffmann., A.
name: Soergel, E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: At first sight piezoresponse force microscopy (PFM) seems an ideal technique for the determination of piezoelectric coefficients (PCs), thus making use of its ultra-high vertical resolution (<0.1 pm/V). Christman et al. \cite{Chr98} first used PFM for this purpose. Their measurements, however, yielded only reasonable results of unsatisfactory accuracy, amongst others caused by an incorrect calibration of the setup. In this contribution a reliable calibration procedure is given followed by a careful analysis of the encounted difficulties determining PCs with PFM. We point out different approaches for their solution and expose why, without an extensive effort, those difficulties can not be circumvented.
Digital mapping of soil properties with application for sustainable intensification of agriculture in Cameroon
Creators: name: Brice, Silatsa Tedou Francis
Publisher: name: Zenodo
Year: 2021
Subjects: Legacy soil data, Digital soil mapping, Soil properties, sustainable agriculture, soil suitability

description: Although soil survey is required to guide agricultural land use planning and management in Cameroon, attention on it has been limited, thus creating gaps in soil resource inventory. However, with the availability of well compiled legacy soil data, nationwide reliable thematic soil properties maps, with high accuracy can be produced using digital soil mapping tools, and effectively used to guide decision making in agroecosystems. This study aimed at investigating the applicability of digital soil mapping (DSM) methods on legacy soil data for inventorying soil resources at 1-ha spatial resolution in Cameroon. Specific objectives were to (i) rescue, compile and harmonize the soil profile database; (ii) assess and map the distribution of some key soil properties (pH, Ca, Mg, K, SOC, N, P, CEC, Sand, Silt, Clay, and textural classes); (iii) assess the countrywide distribution of soil organic carbon stock (SOCS) down to 100 cm depth, and (iv) appraise the DSM methodology for applications in sustainable intensification of cocoa production in Cameroon. The spatial distribution of soil properties was predicted using machine learning algorithms at internationally recognized standard soil depths (0 – 5 cm, 5 – 15 cm, 15 – 30 cm, 30 – 60 cm, 60 – 100 cm, and 100 – 200 cm). The harmonized soil profile database (Camsodat 0.1) contains currently about 5250 layers which are unevenly distributed over 1600 georeferenced positions across the country. Prediction models estimated the national distribution of soil properties, with good performances (R2 up to 68%). Terrain and climate attributes were the most relevant environmental factors to predict soil properties distribution across the Country. The national distribution of SOCS was consistent with the pattern of agroecological zones. In total, about 5.67 Pg of SOCS is stored in the first 100 cm depth of soil in Cameroon, with 50% in the top 30 cm depth. Land evaluation revealed pieces of soils suitable for cocoa-production with varying levels of suitability and requiring site-specific management approaches. Generally, for cocoa production, 9%, of the area is highly suitable, 78% moderately suitable, and 13% marginal suitable. Five (5) soil properties mostly affecting cocoa productivity in decreasing order of importance are OC > Clay > Mg > pH > Silt. Although there are some gaps in soil survey across Cameroon, DSM showed a high potential to close such gaps, and the versatility in determining SOCS down to 100 cm depth and applicability in soil suitability analysis for intensification of cocoa production in Cameroon.
Precise Radial Velocities of Giant Stars II. Pollux and its Planetary Companion
Creators: name: Reffert, Sabine
name: Quirrenbach, Andreas
name: Mitchell, David S.
name: Albrecht, Simon
name: Hekker, Saskia
name: Fischer, Debra A.
name: Marcy, Geoffrey W.
name: Butler, R. Paul
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It has long been speculated that the observed periodic radial velocity pattern for the K giant Pollux might be explained in terms of an orbiting planetary companion. We have collected 80 high-resolution spectra for Pollux at Lick Observatory yielding precise radial velocities with a mean error of 3.8 m/s, providing the most comprehensive and precise data set available for this star. Our data confirm the periodicity previously seen in the radial velocities. We derive a period of 589.7+/-3.5 days and, assuming a primary mass of 1.86 M_Sun, a minimum companion mass of 2.9+/-0.3 M_Jup, consistent with earlier determinations. No evidence for any periodicities is visible in our analysis of the shapes of the spectral lines via the bisector method, so that we conclude that evidence is accumulating and compelling for a planet around Pollux. However, some last doubt remains about this interpretation, because non-radial pulsations which might be present in giant stars could in principle also explain the observed radial velocities, while the accompanying bisector variations might be too small to be detectable with current data.
description: 13 pages, 4 figures, accepted by ApJ
Experimental check of model of object innovation evaluation
Creators: name: Ivanov, V. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: The article discusses the approach for evaluating the innovation index of the products and technologies. The evaluation results can be used to create a warehouse of the object descriptions with significant innovation potential. The model of innovation index computation is based on the concepts of novelty, relevance, and implementability of the object. Formal definitions of these indicators are given and a methodology for their calculation are described. The fuzzy methods to coprocess (incomplete) data from numerous sources and to obtain probabilistic innovation assessments are used. The experimental data of the model check including the calculations of local criteria and global additive evaluation criterion are presented. The cyclical nature of dynamic changes in indicators, their interdependence was established, some general features of the products promotion were found. The obtained experimental data are consistent with expert estimates of the products under study. The analysis of the local criteria used in the research gives grounds to assert the correct use of the additive n-dimensional utility function. The adequacy of assumptions and formal expressions that are used in computational algorithms for selection information for data warehouse is confirmed.
description: 10 pages, in Russian
Broadcast Capacity Region of Two-Phase Bidirectional Relaying
Creators: name: Oechtering, Tobias J.
name: Bjelakovic, Igor
name: Schnurr, Clemens
name: Boche, Holger
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In a three-node network a half-duplex relay node enables bidirectional communication between two nodes with a spectral efficient two phase protocol. In the first phase, two nodes transmit their message to the relay node, which decodes the messages and broadcast a re-encoded composition in the second phase. In this work we determine the capacity region of the broadcast phase. In this scenario each receiving node has perfect information about the message that is intended for the other node. The resulting set of achievable rates of the two-phase bidirectional relaying includes the region which can be achieved by applying XOR on the decoded messages at the relay node. We also prove the strong converse for the maximum error probability and show that this implies that the $[\eps_1,\eps_2]$-capacity region defined with respect to the average error probability is constant for small values of error parameters $\eps_1$, $\eps_2$.
description: 25 pages, 2 figures, submitted to IEEE Transactions on Information Theory
FAIRplus
Creators: name: Scollen, Serena
Publisher: name: F1000 Research Limited
Year: 2019

description: Presentation of the FAIRplus project at the ELIXIR All Hands meeting 2019 in Lisbon, Portugal. The FAIRplus project aims to develop tools and guidelines for making life science data FAIR (Findable, Accessible, Interoperable, Reusable).
Η τέλεση της Θείας Ευχαριστίας: κανονική διδασκαλία και πράξη
Creators: name: Νάσσης, Ιωάννης-Χρυσόστομος
Publisher: name: Aristotle University of Thessaloniki
Year: 2006
Subjects: Θεία Ευχαριστία
Κανόνες
Λειτουργική
Divine Eucharist
Canons
Liturgics

description: Η μελέτη αυτή έχει ως αντικειμενό της τον εντοπισμό, την ερμηνευτική διασάφιση και την ιστορική αξιολόγηση των πληροφοριών που σχετίζονται με την τέλεση της Θείας Ευχαριστίας, όπως αυτές παρουσιάζονται στην κανονική γραμματεία της Ορθοδόξου Εκκλησίας. Η εργασία υποδιαιρείται σε τέσσερα κεφάλαια(1. το θεολογικό υπόβαθρο του ευχαριστιακού γεγονότος, 2. η ιερουργία του μυστηρίου, 3. η τακτή και έκτακτη τέλεση της Θείας Ευχαριστίας). Η βασική ύλη της μελέτης προέρχεται από το περιεχόμενο της τελευταίας επεξεργασίας του "Νομοκάνονος εις ιδ'τίτλους". Ως εκ τούτου οριοθετείται χρονικά μέχρι το τέλος του 11ου αιώνα
description: The scope of this study is to locate examine, clarify and historically evaluate the information relative to the celebration of the Divine Eucharist as found in the canonical literature of the Orthodox Church. The thesis is divided into four chapters(1. the theological foundation of the Eucharist Event, 2. the rite of sacrament, 3. the regular and exceptional celebration of the Divine Liturgy, and 4. Canonical limitations on the celebration of the Divine Liturgy). The basic material of this study is the content of the final edition of the "Nomocanon in 14 titles". This, it is chronologically limited to the end of the 11th cent.