cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modular Invariant $A_{4}$ Models for Quarks and Leptons with Generalized CP Symmetry
Creators: name: Yao, Chang-Yuan
name: Lu, Jun-Nan
name: Ding, Gui-Jun
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We perform a systematical analysis of the $A_4$ modular models with generalized CP for the masses and flavor mixing of quarks and leptons, and the most general form of the quark and lepton mass matrices is given. The CP invariance requires all couplings real in the chosen basis and thus the vacuum expectation value of the modulus $τ$ uniquely breaks both the modular symmetry and CP symmetry. The phenomenologically viable models with minimal number of free parameters and the results of fit are presented. We find 20 models with 7 real free parameters that can accommodate the experimental data of lepton sector. We then apply $A_4$ modular symmetry to the quark sector to explain quark masses and CKM mixing matrix, the minimal viable quark model is found to contain 10 free real parameters. Finally, we give two predictive quark-lepton unification models which use only 16 real free parameters to explain the flavor patterns of both quarks and leptons.
description: 28 pages, 3 figures
Theory of one-dimensional double-barrier quantum pump in two-frequency signal regime
Creators: name: Mahmoodian, M. M.
name: Entin, M. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A one-dimensional system with two $δ$-like barriers or wells bi-chromaticaly oscillating at frequencies $ω$ and $2ω$ is considered. The alternating signal leads to the direct current across the structure (even in a symmetric system). The properties of this quantum pump are studied in a wide range of the system parameters.
description: 4 pages, 5 figures
Evolution of vortices created by conical diffraction in biaxial crystals versus orbital angular momentum
Creators: name: Brenier, A
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Light states evolution versus their fractional orbital angular momentum (OAM) has been analyzed in the conical diffraction process occurring through biaxial crystals. Experimental results are provided by a non-degenerate cascade of KGd(WO$_2$)$_4$ and Bi$_2$ZnOB$_2$O$_6$ biaxial crystals. The continuous $0\to 1\to 2$ $\hbar$/photon increasing of the fractional OAM in passing through integer values was operated with the help of the spin-orbit coupling in the Bi$_2$ZnOB$_2$O$_6$ crystal. The phase of the state light and its vortices were visualized by interference patterns with a reference beam. The evolution of the fractional OAM value is accompanied by a continuous evolution of pairs of vortices with opposite signs and linked by a $-π/+π$ discontinuous phase line. The phase pattern evolution around half-integer OAM is observed to be continuous. In other cases, the evolution can be interrupted by the breaking of a $-π/+π$ discontinuous phase line and a new pair of vortices with opposite charges is born.
description: Optical Materials, Elsevier, 2020
Ανάπτυξη πληροφοριακού συστήματος για τη διοίκηση και διαχείριση στη δασική υπηρεσία
Creators: name: Καρακύριος, Δημήτριος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Διοίκηση δασών
Διαχείριση δασών
Δασική υπηρεσία
Βάσεις δεδομένων
Δασικό πληροφοριακό σύστημα
Δασική πληροφορική
Forest management
Forest administration
Forest service
Databases
Forest information system
Forest informatics

description: Η Δασική πληροφορική παρέχει ένα χρήσιμο εργαλείο για την στήριξη της παραγωγικότητας και την αντιμετώπιση της γραφειοκρατίας.Ειδικότερα μέσα στη Δασική Υπηρεσία της Ελλάδας που είναι η Κρατική Υπηρεσία για την προστασία και εκμετάλλευση των Δασών στη χώρα, το Πληροφοριακό Σύστημα που σχεδιάστηκε μπορεί να εφαρμοστεί στη διοίκηση και διαχείριση. Το πληροφοριακό Σύστημα δίνει την δυνατότητα να γίνουν όλες οι διαχειριστικές και διοικητικές εργασίες που αφορούν στα Ιδιωτικά και μη ιδιωτικά δάση ακόμη και στους Υπάλληλους που δεν γνωρίζουν πληροφορική.Ως πιλοτική εκδοχή της εφαρμογής επιλέχθηκε η ορεινή δασική περιοχή της Αρναίας.
description: Forest Informatics provides a useful tool to support productivity and confront bureaucracy.Especially, within the Forest Service in Greece which is a governmental division for the protection and explotation of forests in the country, the Information System designed can apply in administration and managment. The I.S comprises allmanagerial and administrative tasks concerning private and non-private forests, even from non-literate in computers employees.As a pilot version of the application it was selected the mountainoys forest area of Arnaia.
A model for double notches and bifurcated components in radio profiles of pulsars and magnetars - Evidence for the parallel acceleration maser in pulsar magnetosphere
Creators: name: Dyks, J.
name: Rudak, B.
name: Rankin, Joanna M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Averaged pulse profiles of three nearby pulsars: B1929+10, J0437-4715 and B0950+08 exhibit unusual `double notches'. These W-like looking features consist of two adjacent V-shaped dips that approach each other at increasing observation frequency nuobs roughly at a rate sep \propto nuobs^{-1/2}, where sep is the separation between the notches' minima. We show that basic properties of the notches, namely their W-like look and the rate of their converging can be understood within a narrow class of models of coherent radio emission from pulsars: the free electron maser models based on coherent inverse Compton scattering of parallel oscillations of ambient electric field. The observed properties of the pulsars imply that the Fourier spectrum of the wiggler-like oscillations is narrow and that the broad-band character of the radio emission reflects the width of the electron energy distribution. Such a model provides a natural explanation for the frequency-independent separation between the main pulse and interpulse of B0950+08 as well as for the lack of radius to frequency mapping in the conal-like emission of J0437-4715. The frequency behaviour of the main pulse in the profile of the first radio magnetar XTE J1810-197 can also be explained within this model.
description: 15 pages, 10 figures, accepted by A&A after minor changes
MPEC 2024-T207 : 2024 TV6
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TV6

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
The surface brightness of the Galaxy at the Solar Neighbourhood
Creators: name: Melchior, A. -L.
name: Combes, F.
name: Gould, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new determination of the surface brightness of our Galaxy at the Solar Neighbourhood as observed from outside the Galaxy. We rely on various existing optical and infra-red surveys to obtain a multiwavelength estimate. On the one hand, scattered light does not contribute significantly to the surface brightness. On the other hand, optical and infrared integrated all-sky surveys (Pioneer 10/11 and COBE/DIRBE) show a systematically larger value than our synthetic local estimate based on Hipparcos data. This local estimate is also compatible with our Galactic simulations normalised at the Solar Neighbourhood and assuming an homogeneous stellar distribution. We interpret this disagreement as a signature of the presence of a local minimum of the stellar density compatible with Gould's belt. According to this result, the global luminosity of the Milky Way should follow the Tully-Fisher relation established for external galaxies.
description: 27 pages (including 13 pages of appendices), 45 figures; accepted for publication in Astronomy and Astrophysics
The Cosmology of Quadratic Torsionful Gravity
Creators: name: Iosifidis, Damianos
name: Ravera, Lucrezia
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the cosmology of a quadratic metric-compatible torsionful gravity theory in the presence of a perfect hyperfluid. The gravitational action is an extension of the Einstein-Cartan theory given by the usual Einstein-Hilbert contribution plus all the admitted quadratic parity even torsion scalars and the matter action also exhibits a dependence on the connection. The equations of motion are obtained by regarding the metric and the metric-compatible torsionful connection as independent variables. We then consider a Friedmann-Lemaître-Robertson-Walker background, analyze the conservation laws, and derive the torsion modified Friedmann equations for our theory. Remarkably, we are able to provide exact analytic solutions for the torsionful cosmology.
description: V2, 17 pages, no figures, some references and comments added
Αθλητικές τιμωρίες-μαστίγωση στον αρχαίο ελληνικό κόσμο
Creators: name: Λίγδη, Κωνσταντία Στέργιου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Αθλητική τιμωρία
Μαστίγωση
Διαμαστίγωση
Ολυμπία
Ζάνες
Αθήνα
Punishment
Flogging
Athlothetai
Athene
Penalties
Olympia

description: Ο ελληνικός λαός μεταχειριζόταν το θεσμό των αγώνων όχι ως σκοπό αλλά ως μέσο ανάπλασης της ελληνικής φυλής. Οι αθλητικοί αγώνες έδιναν ευκαιρίες στα άτομα μιας κοινωνίας, της οποίας ιδεώδη αποτελούσαν η φυσική δύναμη και η ανδρεία, να συμμετάσχουν σε όλα τα επίπεδα των αγώνων, από τις τοπικές γιορτές μέχρι τους Πανελλήνιους αγώνες. Μέσα από αυτήν την αγωνιστική κοινωνία η άθληση αναδύθηκε ως η πιο πλατιά διαδεδομένη και υψηλά ανταμειβόμενη έκφραση συναγωνισμού. Το γεγονός αυτό δεν ήταν τυχαίο, αλλά υπήρξε απόρροια της κοινωνικής ανάγκης που είχαν οι Ελληνικές πόλεις.Οι παραβιάσεις των κανονισμών στους αγώνες, οι δωροδοκίες, οι ασεβείς συμπεριφορές των αθλητών και θεατών, η έπαρση αποτελούσαν σοβαρούς λόγους για να τιμωρηθεί κάποιος, ανεξάρτητα από την κοινωνική τάξη στην οποία ανήκε και την ηλικία. Οι τιμωρίες που επιβάλλονταν στους αθλητές, ήταν τα πρόστιμα, η κατασκευή των αγαλμάτων (Ζάνες) στην Ολυμπία, ο αποκλεισμός από τους αγώνες και η μαστίγωση. Η διαμαστίγωση του ελεύθερου ατόμου ήταν μέρος του αρχαίου εκπαιδευτικού συστήματος, του στρατού καθώς επίσης και των αρχαίων αγώνων. Σχετιζόταν με την λατρεία, με την αποζημίωση και τον εξευμενισμό του θεού για τις παραβάσεις των αθλητών. Αυτό αιτιολογεί πιθανά την ανοχή των ελεύθερων πολιτών στην τιμωρία της μαστίγωσης, η οποία αναμφίβολα συνέβαλλε στη διατήρηση του αθλητικού ιδεώδους και του «ευ αγωνίζεσθαι».
description: The Games institution was dealt with by the Greek people not as an end but as a means of regeneration of the Greek race. The athletic Games gave the opportunity to individuals in a community, the ideals of which were physical strength and bravery, to take part in all the levels of the games, from the local festivals to Panhellenic games. Within this competitive community, athletics was emerged as a wide spread and highly rewarded expression of competition. This fact was not accidental, but it arose from the social need the Greek towns had. The violations of the Games' regulations, bribery, the impertinent behaviour of the athletes and spectators, arrogance comprised serious reasons for someone to be punished, regardless of social class and age. Punishment which was imposed on the athletes was fine, the making of statues (Zanes) in Olympia, exclusion from the games and whipping. The whipping of a free individual was part of the ancient educational system, of the army as well as of the ancient games. It was related to the worship, compensation and propitiation of God for the athletes' offences. This is the possible reason for the free citizens' tolerance to the punishment of whipping, which undoubtedly contributed to the preservation of the athletic ideals and fair play.
Modeling particle acceleration and non-thermal emission in supernova remnants
Creators: name: Orlando, S.
name: Miceli, M.
name: Ustamujic, S.
name: Tutone, A.
name: Greco, E.
name: Petruk, O.
name: Bocchino, F.
name: Peres, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: According to the most popular model for the origin of cosmic rays (CRs), supernova remnants (SNRs) are the site where CRs are accelerated. Observations across the electromagnetic spectrum support this picture through the detection of non-thermal emission that is compatible with being synchrotron or inverse Compton radiation from high energy electrons, or pion decay due to proton-proton interactions. These observations of growing quantity and quality promise to unveil many aspects of CRs acceleration and require more and more accurate tools for their interpretation. Here, we show how multi-dimensional MHD models of SNRs, including the effects on shock dynamics due to back-reaction of accelerated CRs and the synthesis of non-thermal emission, turned out to be very useful to investigate the signatures of CRs acceleration and to put constraints on the acceleration mechanism of high energy particles. These models have been used to interpret accurately observations of SNRs in various bands (radio, X-ray and $γ$-ray) and to extract from them key information about CRs acceleration.
description: 16 pages, 5 figures, invited review accepted for publication on New Astronomy
Obesity in K–8 Students — New York City, 2006–07 to 2010–11 School Years
Creators: name: Centers For Disease, Control
Publisher: name: Digital Repository at the University of Maryland
Year: 2011
Subjects: Prenatal & Pediatric Health
Obesity
interventions
Centers for Disease Control

description: Overweight and obese children are more likely to develop risk factors that can lead to respiratory, metabolic, and cardio¬vascular illness (1–3). The increase in prevalence of childhood overweight and obesity in the United States since the 1960s has been well documented (4). In New York City, in 1996, an estimated 19.7% of third grade children and 21.2% of sixth grade children in public and private schools were found to be overweight (5); in 2003, an estimated 43% of the city’s public elementary school students were found to be overweight, and 24% of these students were obese (6). To update…
Numerical symmetrization of state of identical particles
Creators: name: Utyuzh, Oleg
name: Wilk, Grzegorz
name: Wlodarczyk, Zbigniew
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The method of numerical symmetrization of state of identical particles proposed by us before is clarified and discussed.
description: Talk presented by O.Utyuzh at XXXVI International Symposium on Multiparticle Dynamics, September 2-8, 2006, Paraty (RJ), Brazil; minor corrections, to be published in Braz. J. Phys. (2007)
Observations of GRO J1744-28 in quiescence with XMM-Newton
Creators: name: Doroshenko, Victor
name: Suleimanov, Valery
name: Tsygankov, Sergey
name: Mönkkönen, Juhani
name: Ji, Long
name: Santangelo, Andrea
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the deep observations of the "bursting pulsar" GRO J1744-28, which were performed with XMM-Newton and aimed to clarify the origin of its X-ray emission in quiescence. We detect the source at a luminosity level of $\sim10^{34}$ erg s$^{-1}$ with an X-ray spectrum that is consistent with the power law, blackbody, or accretion-heated neutron star atmosphere models. The improved X-ray localization of the source allowed us to confirm the previously identified candidate optical counterpart as a relatively massive G/K~III star at 8 kpc close to the Galactic center, implying an almost face-on view of the binary system. Although we could only find a nonrestricting upper limit on the pulsed fraction of $\sim20$%, the observed hard X-ray spectrum and strong long-term variability of the X-ray flux suggest that the source is also still accreting when not in outburst. The luminosity corresponding to the onset of centrifugal inhibition of accretion is thus estimated to be at least two orders of magnitude lower than previously reported. We discuss this finding in the context of previous studies and argue that the results indicate a multipole structure in the magnetic field with the first dipole term of $\sim 10^{10}$ G, which is much lower than previously assumed.
description: 9 pages, 8 figures, accepted in A&A
АНЕМИЯ У БОЛЬНЫХ С РЕВМАТОИДНЫМ АРТРИТОМ: ОСОБЕННОСТИ, ПРИЧИНЫ И ЛЕЧЕНИЕ
Creators: name: Пулатов, Улугбек
name: Кобилов, Умид
Publisher: name: Zenodo
Year: 2024

description: Жаҳон соғлиқни сақлаш тизими маълумотларига кўра РА умумий касалликлар тузилмасида учинчи ўринни эгаллайди. Ҳозирги замонавий қарашларга кўра, РА ривожланиши негизида ҳужайравий ва гуморал реакциялари ривожланишини таъминловчи иммунорегулятор механизмларнинг кенг қамровли нуқсони ётади. 2016-2020 йилларда Самарқанд шаҳар тиббиёт бирлашмаси кардиоревматология бўлимида ревматоид артрит ташҳиси билан даволанган жами 214 нафар беморлар хамда назорат гуруҳ 20 нафар нисбатан соғлом кишилар танлаб олинди.
A study of pyrite reactivity and the chemical stability of cemented paste backfill
Creators: name: Bertrand, Valérie J.
Publisher: name: University of British Columbia
Year: 2009

description: A two-fold study was carried out to 1) characterize the evolution of the reactivity of pyrite in the early cycles of kinetic test leaching, using cyclic voltamperometry, and 2) document the weathering characteristics of various paste backfill mixtures that contain pyritic tailings, when exposed to leaching environments similar to those encountered in mine settings. Pyrite leaching experiments were carried out on 6 different pyrite samples from existing mines. Cyclic voltamperometry was performed on carbon paste electrodes (CPE) containing fine grained pyrite samples on the unleached samples and after leaching periods of 4, 10 and 20 weeks. Pyrite reactivity profiles, supported by scanning electron microscope (SEM) observations and leachate chemistry data showed that minor phases of sphalerite and galena present in the pyrite samples were the most important parameters affecting pyrite reactivity in the initial leaching cycles. Sphalerite and galena were found to effectively retard the oxidation of pyrite in the early leaching cycles. As sphalerite and galena were leached out, an increase in the reactivity of pyrite was observed, followed by a gradual loss of reactivity from precipitate coatings. At a fundamental level, mineral surface characterization by cyclic voltamperometry was found useful in the interpretation of kinetic test data for the prediction of acid rock drainage (ARD) generation. For the backfill weathering study, paste backfill samples of 4 different mines were leached in deionized water (pH 5.5) in flooded and alternating air-flooded environments and in a simulated ARD solution (Fe=500 mg/1, SO4=1.5 g/1 and pH 2.5) for 20 weeks. SEM, solid phase chemistry, paste pH, acid-base accounting measurements and leachate chemistry were also used to document the weathering characteristics of cemented paste backfill (CPB). This study revealed that hydrated portland cement minerals are pH sensitive and highly soluble. Short-term exposures of portland-CPB to circum-neutral water or to ARD solution promoted the dissolution of the binder material, increasing the porosity of the backfill and further infiltration of aqueous solution. Long-term exposure or flooding of CPB was found to promote the precipitation of secondary, expansive minerals such as gypsum in addition to solubilizing primary cement minerals. Detailed chemical analyses and acid-base accounting indicated that the neutralizing potential added to the material by the cement phase is short-lived and the small volumes added are insufficient to neutralize the acid generating potential of the mixture. All ARD solution-leached CPB samples formed an increasingly thick crust of precipitates that, with time, reduced the ability of the CPB to neutralize the ARD solution. [Scientific formulae used in this abstract could not be reproduced.]
Machine Learning aided 3D-position reconstruction in large LaCl$_{3}$ crystals
Creators: name: Balibrea-Correa, J.
name: Lerendegui-Marco, J.
name: Babiano, V.
name: Caballero, L.
name: Calvo, D.
name: Ladarescu, I.
name: Olleros-Rodriguez, P.
name: Domingo-Pardo, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We investigate five different models to reconstruct the 3D $γ$-ray hit coordinates in five large \lacls monolithic crystals optically coupled to pixelated silicon photomultipliers. These scintillators have a base surface of 50 $\times$ 50 mm$^2$ and five different thicknesses, from 10 mm to 30 mm. Four of these models are analytical prescriptions and one is based on a Convolutional Neural Network. Average resolutions close to 1-2mm fwhm are obtained in the transverse crystal plane for crystal thicknesses between 10 mm and 20 mm using analytical models. For thicker crystals average resolutions of about 3-5~mm fwhm are obtained. Depth of interaction resolutions between 1mm and 4 mm are achieved depending on the distance of the interaction point to the photosensor surface. We propose a Machine Learning algorithm to correct for linearity distortions and pin-cushion effects. The latter allows one to keep a large field of view of about 70-80\% of the crystal surface, regardless of crystal thickness. This work is aimed at optimizing the performance of the so-called Total Energy Detector with Compton imaging capability (i-TED) for time-of-flight neutron capture cross-section measurements.
Entanglement entropy in collective models
Creators: name: Vidal, J.
name: Dusuel, S.
name: Barthel, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss the behavior of the entanglement entropy of the ground state in various collective systems. Results for general quadratic two-mode boson models are given, yielding the relation between quantum phase transitions of the system (signaled by a divergence of the entanglement entropy) and the excitation energies. Such systems naturally arise when expanding collective spin Hamiltonians at leading order via the Holstein-Primakoff mapping. In a second step, we analyze several such models (the Dicke model, the two-level BCS model, the Lieb-Mattis model and the Lipkin-Meshkov-Glick model) and investigate the properties of the entanglement entropy in the whole parameter range. We show that when the system contains gapless excitations the entanglement entropy of the ground state diverges with increasing system size. We derive and classify the scaling behaviors that can be met.
description: 11 pages, 7 figures
Covariant density functional theory input for r-process simulations in actinides and superheavy nuclei: the ground state and fission properties
Creators: name: Taninah, A.
name: Agbemava, S. E.
name: Afanasjev, A. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The systematic investigation of the ground state and fission properties of even-even actinides and superheavy nuclei with $Z=90-120$ from the two-proton up to two-neutron drip lines with proper assessment of systematic theoretical uncertainties has been performed for the first time in the framework of covariant density functional theory (CDFT). These results provide a necessary theoretical input for the r-process modeling in heavy nuclei and, in particular, for the study of fission recycling. Four state-of-the-art globally tested covariant energy density functionals (CEDFs), namely, DD-PC1, DD-ME2, NL3* and PC-PK1, representing the major classes of the CDFT models are employed in the present study. Ground state deformations, binding energies, two neutron separation energies, $α$-decay $Q_α$ values and half-lives and the heights of fission barriers have been calculated for all these nuclei. Theoretical uncertainties in these physical observables and their evolution as a function of proton and neutron numbers have been quantified and their major sources have been identified. Spherical shell closures at $Z=120$, $N=184$ and $N=258$ and the structure of the single-particle (especially, high-$j$) states in their vicinities as well as nuclear matter properties of employed CEDFs are two major factors contributing into theoretical uncertainties. However, different physical observables are affected in a different way by these two factors. For example, theoretical uncertainties in calculated ground state deformations are affected mostly by former factor, while theoretical uncertainties in fission barriers depend on both of these factors.
description: 28 pages, 18 figures, Physical Review C, in press
Οι άνθρωποι του περιθωρίου στη γαλλική ζωγραφική κατά το β' μισό του 19ου αιώνα
Creators: name: Ανέστη, Μαρία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Περιθωριακοί
Γαλλική ζωγραφική 19ος αιώνας
Παρίσι
Εποχή της παρακμής
Marginalized people
French painting
19th century
Paris
Decadence
Fin du siecle

description: Η παρούσα εργασία πραγματεύεται την απεικόνιση ανθρώπων του περιθωρίου (εκδιδόμενες γυναίκες, μποέμ, ρακοσυλλέκτες, σαλτιμπάγκοι) σε εργα πρωτοπόρων καλλιτεχνών που έζησαν και δημιούργησαν στο Παρίσι από το 1850 έως τις αρχές του 20ου αιώνα. Η υποδοχή των παραπάνω εικαστικών προϊόντων από τους συγχρόνούς τους, το κοινωνικό και ιδεολογικό πλαίσιο που καθορίζει τη δραστηριότητα των ζωγράφων, η ρήξη των τελευταίων με τους καδημαϊκούς κανόνες, καθώς και η αλλαγή στη φύση της αναπαράστασης, αποτελούν τις βασικές συνιστώσες της συγκεκριμένης μεταπτυχιακής έρευνας
description: The present dissertation treats the representation of marginalized people (such as prostitutes, saltimbanques, bohemians and ragpickers) in the work of innovative artists, who lived and created in Paris from 1850 until the first years of the 20th century. The reception of the above mentioned artistic products by their contemporaries, the social and ideological background which determines the activity of the painters, the rupture of the latter with certain academic rules, as well as the profound change in the nature of representation compose the fundamental components of this postgraduate research
Possible evidence of hydrogen emission in the first-overtone and multi-mode RR Lyrae variables
Creators: name: Duan, Xiao-Wei
name: Chen, Xiao-Dian
name: Deng, Li-Cai
name: Yang, Fan
name: Liu, Chao
name: Bhardwaj, Anupam
name: Zhang, Hua-Wei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The nature of shock waves in non-fundamental mode RR Lyrae stars remains a mystery because of limited spectroscopic observations. We apply a pattern recognition algorithm on spectroscopic data from SDSS and LAMOST and report the first evidence of hydrogen emission in first-overtone and multi-mode RR Lyrae stars showing the "first apparition", which is the most prominent observational characteristic of shock in RR Lyrae variables. We find ten RRc stars in SDSS, ten RRc stars in LAMOST, and three RRd stars in LAMOST that show blueshifted Balmer emissions. The emission features possibly indicate the existence of shock waves. We calculate the radial velocities of the emission lines, which are related to the physical conditions occurring in the radiative zone of shock waves. Using photometric observations from ZTF, we present a detailed light curve analysis for the frequency components in one of our RRd stars with hydrogen emission, RRdl3, for possible modulations. With the enormous volume of upcoming spectral observations of variable stars, our study raises the possibility of connecting the unexplained Blazhko effect to shock waves in non-fundamental mode RR Lyrae stars.
description: Accepted for publication in The Astrophysical Journal (ApJ), 12 pages, 7 figures, 4 tables. Merry Christmas and happy new year!
Blaumeiser, Hubertus: Martin Luthers Kreuzestheologie
Creators: name: Dörfel, Donata
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 46 Nr. 4 (1997): Ökumenische Rundschau, Band 46, Heft 4
Propagating bands of plastic deformation in a metal alloy as critical avalanches
Creators: name: Mäkinen, Tero
name: Karppinen, Pasi
name: Ovaska, Markus
name: Laurson, Lasse
name: Alava, Mikko J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The plastic deformation of metal alloys localizes in the Portevin--Le Chatelier effect in bands of different types, including propagating, or type 'A' bands, usually characterised by their width and a typical propagation velocity. This plastic instability arises from collective dynamics of dislocations interacting with mobile solute atoms but the resulting sensitivity to the strain-rate lacks fundamental understanding. Here we show, by employing high-resolution imaging in tensile deformation experiments of an aluminum alloy, that the band velocities exhibit large fluctuations. Each band produces a velocity signal reminiscent of crackling noise bursts observed in numerous driven avalanching systems from propagating cracks in fracture to the Barkhausen effect in ferromagnets. The statistical features of these velocity bursts including their average shapes and size distributions obey predictions of a simple mean-field model of critical avalanche dynamics. Our results thus reveal a novel paradigm of criticality in the localization of deformation.
A General Relativistic Rotating Evolutionary Universe - Part II
Creators: name: Berman, Marcelo Samuel
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: As a sequel to (Berman, 2008a), we show that the rotation of the Universe can be dealt by generalised Gaussian metrics, defined in this paper. Robertson-Walker's metric has been employed with proper-time, in its standard applications; the generalised Gaussian metric imply in the use of a non-constant temporal metric coefficient modifying Robertson-Walker's standard form. Experimental predictions are made
description: 7 pages including front cover. Published
Fragile, yet resilient: Adaptive decline in a collaboration network of firms
Creators: name: Schweitzer, Frank
name: Casiraghi, Giona
name: Tomasello, Mario V.
name: Garcia, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Risk Management (q-fin.RM)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: The dynamics of collaboration networks of firms follow a life-cycle of growth and decline. That does not imply they also become less resilient. Instead, declining collaboration networks may still have the ability to mitigate shocks from firms leaving, and to recover from these losses by adapting to new partners. To demonstrate this, we analyze 21.500 R\&D collaborations of 14.500 firms in six different industrial sectors over 25 years. We calculate time-dependent probabilities of firms leaving the network and simulate drop-out cascades, to determine the expected dynamics of decline. We then show that deviations from these expectations result from the adaptivity of the network, which mitigates the decline. These deviations can be used as a measure of network resilience.
Room-Temperature Superconductivity in Boron-Nitrogen Doped Lanthanum Superhydride
Creators: name: Ge, Yanfeng
name: Zhang, Fan
name: Hemley, Russell J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recent theoretical and experimental studies of hydrogen-rich materials at megabar pressures (i.e., >100 GPa) have led to the discovery of very high-temperature superconductivity in these materials. Lanthanum superhydride LaH$_{10}$ has been of particular focus as the first material to exhibit a superconducting critical temperature (T$_c$) near room temperature. Experiments indicate that the use of ammonia borane as the hydrogen source can increase the conductivity onset temperatures of lanthanum superhydride to as high as 290 K. Here we examine the doping effects of B and N atoms on the superconductivity of LaH$_{10}$ in its fcc (Fm-3m) clathrate structure at megabar pressures. Doping at H atomic positions strengthens the H$_{32}$ cages of the structure to give higher phonon frequencies that enhance the Debye frequency and thus the calculated T$_c$. The predicted T$_c$ can reach 288 K in LaH$_{9.985}$N$_{0.015}$ within the average high-symmetry structure at 240 GPa.
description: 10 pages, 4 figures
Spectroscopic evolution of massive stars near the main sequence at low metallicity
Creators: name: Martins, F.
name: Palacios, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present synthetic spectra and SEDs computed along evolutionary tracks at Z=1/5 Zsun and Z=1/30 Zsun, for masses between 15 and 150 Msun. We predict that the most massive stars all start their evolution as O2 dwarfs at sub-solar metallicities. The fraction of lifetime spent in the O2V phase increases at lower metallicity. The distribution of dwarfs and giants we predict in the SMC accurately reproduces the observations. Supergiants appear at slightly higher effective temperatures than we predict. More massive stars enter the giant and supergiant phases closer to the ZAMS, but not as close as for solar metallicity. This is due to the reduced stellar winds at lower metallicity. Our models with masses higher than ~60 Msun should appear as O and B stars, whereas these objects are not observed, confirming a trend reported in the recent literature. At Z=1/30 Zsun, dwarfs cover a wider fraction of the MS and giants and supergiants appear at lower effective temperatures than at Z=1/5 Zsun. The UV spectra of these low-metallicity stars have only weak P-Cygni profiles. HeII 1640 sometimes shows a net emission in the most massive models, with an equivalent width reaching ~1.2 A. For both sets of metallicities, we provide synthetic spectroscopy in the wavelength range 4500-8000 A. This range will be covered by the instruments HARMONI and MOSAICS on the ELT and will be relevant to identify hot massive stars in Local Group galaxies with low extinction. We suggest the use of the ratio of HeI 7065 to HeII 5412 as a diagnostic for spectral type. We show that this ratio does not depend on metallicity. Finally, we discuss the ionizing fluxes of our models. The relation between the hydrogen ionizing flux per unit area versus effective temperature depends only weakly on metallicity. The ratios of HeI and HeII to H ionizing fluxes both depend on metallicity, although in a slightly different way.
description: 18 pages, 17 figures + appendix. Accepted in Astronomy and Astrophysics
Η συμβολή της Χριστιανικής Ιεραποστολής στην Ευρωπαϊκή εκπαίδευση κατά τους 18ο και 19ο αιώνες
Creators: name: Παπαγεωργίου, Ιωάννης Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2024
Subjects: Χριστιανική Ιεραποστολή
Παιδευτικοί και διδακτικοί μέθοδοι και στόχοι
Ενσωμάτωση στα Ευρωπαϊκά Εκπαιδευτικά Προγράμματα
Christian Mission
Educational and teaching methods and goals
Integration into the European Educational Programs

description: Σε αυτήν την ευσύνοπτη αλλά και πρωτότυπη μελέτη επιχειρούμε να αναδείξουμε τους παιδευτικούς και διδακτικούς στόχους και τις μεθόδους, που οι Ευρωπαίοι Χριστιανοί ιεραπόστολοι εφάρμοσαν κατά τους 18ο και 19ο αιώνες στο έργο τους, τόσο στις χώρες ιεραποστολικού προορισμού τους, όσο και στην ίδια την Ευρώπη αργότερα, και οι οποίοι (στόχοι και μέθοδοι) εφαρμόστηκαν άλλοτε προγενέστερα και άλλοτε παράλληλα ή μετέπειτα στα διάφορα ευρωπαϊκά εκπαιδευτικά ιδρύματα. Η έρευνα κατέδειξε ότι οι Ευρωπαίοι Χριστιανοί ιεραπόστολοι ―άλλοι πεπαιδευμένοι και άλλοι αυτοδίδακτοι― και εφάρμοσαν, ιδίως στην αρχή, παιδαγωγικές και διδακτικές τακτικές, γνωστές ήδη στα Εκπαιδευτήρια της Ευρώπης, αλλά και ανέπτυξαν δικά τους ψυχοπαιδαγωγικά, ομιλητικά και διδακτικά συστήματα Ιεραποστολικής και Κατηχητικής, προσαρμοζόμενα στο ξένο πολιτισμικό περιβάλλον. Εξ άλλου, πολλές από τις νέες παιδαγωγικές και διδακτικές μεθόδους των Ευρωπαίων ιεραποστόλων εφαρμόστηκαν αργότερα ή παράλληλα και από εκπαιδευτικούς τής Ευρώπης ή άλλους ιεραποστόλους. Με άλλα λόγια, αυτή η πολιτισμική Παιδεία, την οποία αποκόμιζαν οι Ευρωπαίοι ιεραπόστολοι από τις χώρες που επισκέπτονταν, ενσωματώθηκε (ή εν μέρει και απορροφήθηκε) σταδιακά στα εκπαιδευτικά Προγράμματα σπουδών της Ευρώπης.
description: In this concise yet original study, we attempt to highlight the educational and pedagogical goals and methods that European Christian missionaries implemented during the 18th and 19th centuries in their work, both in their missionary destination countries and later in Europe itself. These goals and methods were sometimes implemented earlier, sometimes concurrently, or later in various European educational institutions. The research demonstrated that the European Christian missionaries—some educated and others self-taught—initially applied pedagogical and teaching tactics already known in European schools, but also developed their own psychopedagogical, rhetorical, and didactic systems for missionary and catechetical purposes, adapting to the foreign cultural environments. Moreover, many of the new pedagogical and teaching methods of the European missionaries were later or concurrently adopted by educators in Europe or other missionaries. In other words, the cultural education that the European missionaries acquired from the countries they visited was gradually incorporated (or partly absorbed) into the educational curricula of Europe.
Θεωρήματα κάλυψης ολόμορφων συναρτήσεων
Creators: name: Τύμης, Νικόλαος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Σταθερά Bloch
Σταθερά Fandari
Σύμμορφη σταθερά Bloch
Λήμμα Ahlfors
Συναρτήσεις Bloch
Koebe
Bloch constant
Landari constant
Shlich Bloch constant
Ahlfors Lemma
Hyperbolic metric

description: Η διπλωματική αυτή παρουσιάζει μερικά άνω και κάτω φράγματα των σταθερών Bloch, Landari και σύμμορφη σταθερά Bloch. Πιο συγκεκριμένα δίνουμε τις εκτιμήσεις Ahlfors 1>/1/2, B >/ -Γ3/4. Την εκτίμηση του Bonk B> F3/4 + 10(-14), και τις εκτιμήσεις των Robinson και της Goodman για τη σύμμορφη σταθερή Bloch U με U<0,658 και U<0,65647 αντίστοιχα.
description: This dissertation presents some upper and lower bounds of The Bloch Constant, B the Landan Constant < and the Bloch Constant U for shlicht functions. In particular we present the lower bounds B>/F3/4 and L>/1/2 by Ahlfors. The lower bound B> F3/4+10(-14) by Bonk and the upper bounds U<0,658 and U<0,65647 by Robinson and Goodman respectately.
A Review of Instanton Quarks and Confinement
Creators: name: van Baal, Pierre
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review the recent progress made in understanding instantons at finite temperature (calorons) with non-trivial holonomy, and their monopole constituents as relevant degrees of freedom for the confined phase.
description: 4 pag., 2 fig., based on a talk given at ``Quark Confinement and the Hadron Spectrum 7", Ponta Delgada, Sao Miguel, Azores, Portugal, Sept. 2-7, 2006
Η αντιμετώπιση του "ξένου" στο σχολείο κατά την Ορθόδοξη Χριστιανική Αγωγή
Creators: name: Λιώτα, Δήμητρα Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2007
Subjects: Ξένος
Διαπολιτισμική εκπαίδευση
Χριστιανική αγωγή
Μετανάστευση
Σύγχρονο σχολείο
Μειονότητες
Foreigner
Intercultural education
Christian education
Immigration
Contemporary school
Minorities

description: Η παρουσία, τα τελευταία χρόνια μεγάλου αριθμού "ξένων" μαθητών στο ελληνικό σχολείο έχει διαμορφώσει μια νέα παιδαγωγική κατάσταση. Για την Ορθοδοξία, κάθε πρόβλημα του ανθρώπου είναι κατεξοχήν πρόβλημα πνευματικό και ως τέτοιο πρέπει αν αντιμετωπίζεται, διαφορετικά κάθε προτεινόμενη λύση θα είναι πρόσκαιρη. Αυτή η σύνδεση μεταξύ της Ορθόδοξης Χριστιανικής Αγωγής και των σύγχρονων εκπαιδευτικών κατευθύνσεων επιχειρείται να γίνει στα πλαίσια της διπλωματικής αυτής εργασίας. Στο πρώτο κεφάλαιο διευκρινίζεται η έννοια του "ξένου" αλλά και της αντιμετώπισης αυτού στην πορεία του μέσα στο χρόνο, ενώ παρουσιάζεται ο "ξένος" και μέσα από την Αγία Γραφή. Στο δεύτερο κεφάλαιο επιχειρείται μια παρουσίαση της εκπαίδευσης του "ξένου" ανά τον κόσμο, ενώ παρουσιάζεται και η αντιμετώπισή του στη σύγχρονη Ελλάδα, η εκπαίδευση των τσιγγανοπαίδων, τα ανθρώπινα δικαιώματα και ο κοινωνικός αποκλεισμός του "ξένου". Στο τρίτο κεφάλαιο αναλύεται η Διαπολιτισμική Εκπαίδευση στην Ελλάδα και η έννοια της πολυπολυτισμικότητας. Εδώ δίνεται έμφαση στην άποψη της Ορθόδοξης Χριστιανικής Αγωγής. Στο τέταρτο και τελευταίο κεφάλαιο παρουσιάζονται τα προγράμματα και οι φιλότιμες προσπάθειες της πολιτείας για την αντιμετώπιση του "ξένου" μαθητή
description: At last few years, the presence of a large number of "foreigner" students in greek school has shpaed a new pedagogic education. For Orthodoxy, each problen of humanity is actually a spiritual problem and should confront like that, otherwise the proposed resolution would be precarious. Primary intention of this master assignment was the connection between Orthodox Christian Education and the commands of modern education. In the first chapter is clarified the meaning of "foreigner" through time and through the Holy Bible. In the second chapter is attempted a presentation of "foreigner"'s education per the world and especially in Greece, the human rights and the social handly of "foreigner". In the third chapter is analyzed the Intercultural Education in Greece, especially from the optical of Orthodox Education. In the fourth chapter are presented the government programs and the efforts of society in order to deal effectually with this new situation
Parameter estimation from ICC curves
Creators: name: Lega, Joceline
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Biotechnology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: Incidence vs. Cumulative Cases (ICC) curves are introduced and shown to provide a simple framework for parameter identification in the case of the most elementary epidemiological model, consisting of susceptible, infected, and removed compartments. This novel methodology is used to estimate the basic reproduction ratio of recent outbreaks, including those associated with the ongoing COVID-19 pandemic.
The Coarse Geometry of Merger Trees in ΛCDM
Creators: name: Forero-Romero, Jaime E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We introduce the contour process to describe the geometrical properties of merger trees. The contour process produces a one-dimensional object, the contour walk, which is a translation of the merger tree. We portray the contour walk through its length and action. The length is proportional to to the number of progenitors in the tree, and the action can be interpreted as a proxy of the mean length of a branch in a merger tree. We obtain the contour walk for merger trees extracted from the public database of the Millennium Run and also for merger trees constructed with a public Monte-Carlo code which implements a Markovian algorithm. The trees correspond to halos of final masses between 10^{11} h^{-1} M_sol and 10^{14} h^{-1} M_sol. We study how the length and action of the walks evolve with the mass of the final halo. In all the cases, except for the action measured from Markovian trees, we find a transitional scale around 3 \times 10^{12} h^{-1} M_sol. As a general trend the length and action measured from the Markovian trees show a large scatter in comparison with the case of the Millennium Run trees.
description: 7 pages, 5 figures, submitted to MNRAS
Numerical Simulation of N-vector Spin Models in a Magnetic Field
Creators: name: Mendes, Tereza
name: Cucchieri, Attilio
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Three-dimensional N-vector spin models may define universality classes for such diverse phenomena as i) the superfluid transition in liquid helium (currently investigated in the micro-gravity environment of the Space Shuttle) and ii) the transition from hadronic matter to a quark-gluon plasma, studied in heavy-ion collisions at the laboratories of Brookhaven and CERN. The models have been extensively studied both by field-theoretical and by statistical mechanical methods, including Monte Carlo simulations using cluster algorithms. These algorithms are applicable also in the presence of a magnetic field. Key quantities for the description of the transitions above -- such as universal critical amplitude ratios and the location of the so-called pseudo-critical line -- can be obtained from the models' magnetic equation of state, which relates magnetization, external magnetic field and temperature. Here we present an improved parametrization for the equation of state of the models, allowing a better fit to the numerical data. Our proposed form is inspired by perturbation theory, with coefficients determined nonperturbatively from fits to the data.
description: 6 pages, 2 figures. Work presented at the IV Brazilian Meeting on Simulational Physics -- Ouro Preto - MG/Brazil, August 2005
Rhinolophidae Lacepede
Creators: name: Allen, Glover M.
Publisher: name: Zenodo
Year: 1939
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Rhinolophidae

description: Family RHINOLOPHIDAE.
 Horseshoe Bats
 Reviews: Andersen, Knud. On some bats of the genus Rhinolophus, with remarks on their mutual aflfinities, and descriptions of twenty-six new forms. Proc. Zool. Soc. London, 2: 75-145, pi. 3, 4, Oct. 1905.
 Andersen, Knud. A list of the species and subspecies of the genus Rhinolophus, with some notes on their geographical distribution. Ann. Mag. Nat. Hist. (7) 16: 648-662, Dec. 1905.
description: Published as part of Allen, Glover M., 1939, Family Rhinolophidae. Horseshoe Bats in Checklist of African Mammals, pp. 72-78 in Bulletin of the Museum of Comparative Zoology at Harvard College 81 on page 72, DOI: 10.5281/zenodo.3759519