cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Attosecond neutron Compton scattering from protons
Creators: name: Chatzidimitriou-Dreismann, C. Aris
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The effect of "anomalous" scattering of neutrons and electrons from protons in the electron-volt energy-transfer range is considered, and related experimental results are mentioned. A recent independent confirmation of this effect with a new data analysis procedure is presented. Due to the very short characteristic scattering time, there is no well defined separation of time scales of electronic and protonic motions. An outline of a proposed theoretical interpretation is presented, which is based on the fact that scattering protons represent \textit{open} quantum systems, thus being subject to decoherence.
description: 9 pages, 1 figure, CEWQO-Conference, Vienna 2006
Moduli Decays and Gravitinos
Creators: name: Dine, Michael
name: Kitano, Ryuichiro
name: Morisse, Alexander
name: Shirman, Yuri
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: One proposed solution of the moduli problem of string cosmology requires that the moduli are quite heavy, their decays reheating the universe to temperatures above the scale of nucleosynthesis. In many of these scenarios, the moduli are approximately supersymmetric; it is then crucial that the decays to gravitinos are helicity suppressed. In this paper, we discuss situations where these decays are, and are not, suppressed. We also comment on a possible gravitino problem from inflaton decay.
description: 16 pages, version to appear in Physical Review D
Η αθλητική διαιτησία στο πλαίσιο του Αθλητικού Διαιτητικού Δικαστηρίου της Λωζάνης
Creators: name: Φυτσιλής, Θωμάς Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Αθλητικό Διαιτητικό Δικαστήριο της Λωζάνης (CAS)
Διαιτητική Διαδικασία
Νομολογιακές Αρχές CAS
Court of Arbitration for Sport (CAS)
Arbitration Procedure
CAS Jurisprudential Principles

description: Σκοπός της παρούσας διπλωματικής εργασίας είναι η προσέγγιση του θεσμού της διεθνούς αθλητικής διαιτησίας μέσω της ανάλυσης της διαιτητικής διαδικασίας ενώπιον του Αθλητικού Διαιτητικού Δικαστηρίου της Λωζάνης (CAS). Σε μια προσπάθεια απόδοσης του τρόπου επίλυσης των διεθνών αθλητικών διαφορών, καταγράφεται η ανάγκη για την ίδρυση ενός ανεξάρτητου διαιτητικού θεσμικού οργάνου καθώς και η μετέπειτα έως σήμερα πορεία του. Αποτυπώνονται τα βασικά στοιχεία οργάνωσης και λειτουργίας του και μελετάται διεξοδικά ο τρόπος απονομής αθλητικής δικαιοσύνης μέσω της παρουσίασης της διαιτητικής διαδικασίας κάθε τμήματος ξεχωριστά. Επιπλέον, δίνεται έμφαση σε ορισμένες παγιωμένες πλέον αρχές του διαιτητικού δικαστηρίου, όπως αυτές προκύπτουν από την μακρόχρονη και ομοιόμορφη πρακτική επίλυσης διεθνών αθλητικών διαφορών, εξετάζεται η δικαιοδοσία του σε υποθέσεις ποδοσφαίρου και καταγράφονται οι εναλλακτικές υπηρεσίες της διαμεσολάβησης και γνωμοδότησης. Τέλος, παρουσιάζονται ορισμένες σημαντικές, ελληνικού ενδιαφέροντος, αποφάσεις του δικαστηρίου. Η παρούσα μελέτη μπορεί να αποτελέσει έναν οδηγό στην εξερεύνηση του θεσμού της διεθνούς αθλητικής διαιτησίας και ιδιαιτέρως στην αναζήτηση του τρόπου διαιτητικής επίλυσης των διεθνών αθλητικών διαφορών.
description: The purpose of this thesis is to approximate the institution of international sports arbitration by analyzing the arbitration process before the Lausanne Court of Arbitration for Sport (CAS). In an effort to address how international sports disputes are resolved, the need to establish an independent arbitral institution and its future course to date is documented. The basic elements of its organization and functioning are outlined and the way in which sports justice is delivered through detailed presentation of the arbitration process of each department is studied in detail. In addition, emphasis is placed on some of the more established principles of the arbitral tribunal, as they emerge from the long and uniform practice of resolving international sports disputes, examining its jurisdiction in football affairs, and recording alternative mediation and opinion services. Finally, some important Greek judgments of the court are presented. The present study can be a guide in exploring the institution of international sports arbitration and in particular in exploring how arbitral resolution of international sports disputes is concerned.
Τέχνη, Θρησκεία και Μηδενισμός στη φιλοσοφία του Νίτσε
Creators: name: Αντωνιάδου, Κυριακή Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Τέχνη, Απολλώνιο-Διονυσιακό, Τραγικό, Βούληση, Κατάφαση
Διαλεκτική, Θρησκεία, Ιστορία, Πολιτισμός, Άρνηση, Μηδενισμός
Υπεράνθρωπος, Υπέρβαση, Αιώνια Επιστροφή, Μεταξίωση
Art, Apollonian-Dionysian, Tragic, Will, Affirmation
Dialectic, Religion, History, Culture, Negation, Nihilism
Übermensch, Transcendence, Eternal Recursion, Revaluation

description: Η παρούσα μελέτη είναι μία απόπειρα ολιστικής προσέγγισης του νιτσεϊκού σκέπτεσθαι, καθώς επιχειρεί να περικυκλώσει και να προσδιορίσει τις διδασκαλίες του μεγάλου Γερμανού φιλοσόφου, όπως αυτές διατυπώθηκαν και εννοήθηκαν μέσα στο εκτενέστατο και μακρόχρονο εγχείρημά του. Σκοπός της μεταπτυχιακής αυτής εργασίας είναι να εντοπίσει και να επισημάνει με σαφήνεια τις κεντρικότερες ιδέες του Φρίντριχ Νίτσε γύρω από την τη φιλοσοφία, τη θρησκεία, την τέχνη και τη ζωή, ώστε να θέσει νέες βάσεις σε αυτό που ονομάζουμε «εμπειρία ανάγνωσης και κατανόησης» ενός δύσκολου και περίπλοκου νοητικού πονήματος. Έτσι, η εργασία διαρθρώνεται σε τέσσερα θεματικά κεφάλαια με επιμέρους επεξηγητικές ενότητες, τα οποία, ακολουθώντας τις κατευθυντήριες γραμμές όπως αυτές διατυπώνονται ήδη στην εισαγωγή, συνθέτουν ένα άρτια δομημένο υπόμνημα του «λαβυρινθώδους» νιτσεϊκού στοχασμού. Το υπόμνημα αυτό εξετάζει τη στάση του φιλοσόφου απέναντι στη θρησκεία και τη φιλοσοφία, ως τους δύο πυλώνες που διαμόρφωναν παραδοσιακά την κοινή γνώμη και στάση ζωής στην εποχή του, χαρτογραφεί την κοινωνία και τον άνθρωπο ως το πλέον γόνιμο έδαφος για την άρνηση και τον μηδενισμό, εκθειάζει την τέχνη ως το μοναδικό αντίδοτο στο έρεβος της ανυπαρξίας και τέλος, στέφει τη ζωή βασίλισσα των αρετών, των αξιών και των νοημάτων.
description: The present study consists of an attempt towards a holistic approach to Nietzschean cogitation, as it strives to encircle and define the teachings of the great German philosopher as they were formulated and understood in his most extensive and long-standing venture. The purpose of this master thesis is to identify, to highlight and to clarify Friedrich Nietzsche's core ideas about philosophy, religion, art and life, in order to lay new foundations in what we call an updated “reading and understanding experience” of a daunting and nettlesome work of thought. Thus the assignment is utterly structured into four thematic chapters with individual explanatory modules, which, following the guidelines -as they are vicariously given by the introduction itself, compose a well-formed memoir of the “maze-like” Nietzschean way of thinking. This memoir traces the attitude of the philosopher against religion and philosophy -as the two main pillars that have traditionally been sculpting public opinion over the years, as well as the life perception in his day, then maps society and humanity as the most fertile ground for denial and nihilism, glorifies art as the only antidote to despair caused by non-existence, and lastly crowns life as the queen of virtues, values and meanings.
Optimization for Arbitrary-Oriented Object Detection via Representation Invariance Loss
Creators: name: Ming, Qi
name: Miao, Lingjuan
name: Zhou, Zhiqiang
name: Yang, Xue
name: Dong, Yunpeng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Arbitrary-oriented objects exist widely in natural scenes, and thus the oriented object detection has received extensive attention in recent years. The mainstream rotation detectors use oriented bounding boxes (OBB) or quadrilateral bounding boxes (QBB) to represent the rotating objects. However, these methods suffer from the representation ambiguity for oriented object definition, which leads to suboptimal regression optimization and the inconsistency between the loss metric and the localization accuracy of the predictions. In this paper, we propose a Representation Invariance Loss (RIL) to optimize the bounding box regression for the rotating objects. Specifically, RIL treats multiple representations of an oriented object as multiple equivalent local minima, and hence transforms bounding box regression into an adaptive matching process with these local minima. Then, the Hungarian matching algorithm is adopted to obtain the optimal regression strategy. We also propose a normalized rotation loss to alleviate the weak correlation between different variables and their unbalanced loss contribution in OBB representation. Extensive experiments on remote sensing datasets and scene text datasets show that our method achieves consistent and substantial improvement. The source code and trained models are available at https://github.com/ming71/RIDet.
description: Accepted by IEEE Geoscience and Remote Sensing Letters.The code is available at https://github.com/ming71/RIDet
Intensity of Brillouin light scattering from spin waves in magnetic multilayers with noncollinear spin configurations: Theory and experiment
Creators: name: Buchmeier, M.
name: Dassow, H.
name: Bürgler, D. E.
name: Schneider, C. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The scattering of photons from spin waves (Brillouin light scattering -- BLS) is a well-established technique for the study of layered magnetic systems. The information about the magnetic state and properties of the sample is contained in the frequency position, width, and intensity of the BLS peaks. Previously [Phys. Rev. B 67, 184404 (2003)], we have shown that spin wave frequencies can be conveniently calculated within the ultrathin film approach, treating the intralayer exchange as an effective bilinear interlayer coupling between thin virtual sheets of the ferromagnetic layers. Here we give the consequent extension of this approach to the calculation of the Brillouin light scattering (BLS) peak intensities. Given the very close relation of the BLS cross-section to the magneto-optic Kerr effect (MOKE), the depth-resolved longitudinal and polar MOKE coefficients calculated numerically via the usual magneto-optic formalism can be employed in combination with the spin wave precessional amplitudes to calculate full BLS spectra for a given magnetic system. This approach allows an easy calculation of BLS intensities even for noncollinear spin configurations including the exchange modes. The formalism is applied to a Fe/Cr/Fe/Ag/Fe trilayer system with one antiferromagnetically coupling spacer (Cr). Good agreement with the experimental spectra is found for a wide variety of spin configurations.
description: 19 pages, 5 figures
Additional file 1 of Human menstrual blood-derived stem cells mitigate bleomycin-induced pulmonary fibrosis through anti-apoptosis and anti-inflammatory effects
Creators: name: Chen, Xin
name: Wu, Yi
name: Wang, Yanling
name: Chen, Lijun
name: Zheng, Wendi
name: Zhou, Sining
name: Xu, Huikang
name: Li, Yifei
name: Yuan, Li
name: Xiang, Charlie
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Marine Biology
subject: Cancer
subject: Hematology

description: Additional file 1.
Additional file 3 of Human menstrual blood-derived stem cells mitigate bleomycin-induced pulmonary fibrosis through anti-apoptosis and anti-inflammatory effects
Creators: name: Chen, Xin
name: Wu, Yi
name: Wang, Yanling
name: Chen, Lijun
name: Zheng, Wendi
name: Zhou, Sining
name: Xu, Huikang
name: Li, Yifei
name: Yuan, Li
name: Xiang, Charlie
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Marine Biology
subject: Cancer
subject: Hematology

description: Additional file 3.
Εργαστηριακή μελέτη της επίδρασης της εναπομείνασας οδοντικής ουσίας στη δύναμη αποκόλλησης καλυπτρών επενθέτων ολικών οδοντοστοιχιών
Creators: name: Φωτίου, Άννα Αριστείδη
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ύψος αξονικών τοιχωμάτων
Μεταλλικές καλύπτρες
Δύναμη αποκόλλησης
Ferrule effect
Metal copings
Τensile stress

description: Ο σκοπός της παρούσας εργαστηριακής μελέτης ήταν να αξιολογηθεί η επίδραση της ύπαρξης και του ύψους των αξονικών τοιχωμάτων της εναπομείνασας οδοντικής ουσίας στη συγκράτηση μεταλλικών καλυπτρών επενθέτων ολικών οδοντοστοιχιών. Ένας ανθρώπινος κυνόδοντας της κάτω γνάθου, επιλέχθηκε και θεραπεύτηκε ενδοδοντικά. Πραγματοποιήθηκε κοπτική ταπείνωση 5 mm χωρίς καμία παρασκευή βάθρου και με μηδενικό ύψος αξονικών τοιχωμάτων του μυλικού τμήματος για να υποδεχτεί την καλύπτρα, ενώ επίσης δημιουργήθηκε χώρος στο ριζικό σωλήνα μήκους 12 mm για τοποθέτηση χυτού ενδορριζικού άξονα. Με τη βοήθεια αποτυπωτικού υλικού πολυβυνιλσιλοξάνης και αυτοπολυμεριζόμενης πολυμεθυλμεθακρυλικής ρητίνης, κατασκευάστηκαν 10 δοκίμια/οδοντικά ανάλογα ρητίνης που αποτελεί την ομάδα ελέγχου. Έπειτα, πραγματοποιήθηκε παρασκευή του μυλικού τμήματος του κυνόδοντα για κατασκευή περιφερειακού βάθρου εύρους 1 mm και ύψους αξονικών τοιχωμάτων μύλης 1 mm. Aκολουθώντας την ίδια ακριβώς τεχνική, δημιουργήθηκε μία δεύτερη ομάδα 10 δοκιμίων (ομάδα 1). Στη συνέχεια το βάθρο ταπεινώθηκε 1 mm επιπλέον, δημιουργώντας ύψος αξονικών τοιχωμάτων του μυλικού τμήματος 2 mm με σημείο αναφοράς μέτρησης την αρχική κοπτική αποκοπή της μύλης. Δημιουργήθηκε κατ’ αυτόν τον τρόπο μία τρίτη ομάδα 10 δοκιμίων με βάθρο εύρους 1 mm και ύψος αξονικών τοιχωμάτων 2 mm (ομάδα 2). Για κάθε δοκίμιο ρητίνης, σε όλες τις ομάδες, κατασκευάστηκε μία μεταλλική καλύπτρα η οποία συγκολλήθηκε με υαλοϊονομερή κονία στο αντίστοιχο δοκίμιο. Όλα τα δοκίμια υποβλήθηκαν σε εφαρμογή εφελκυστικής δύναμης μέχρι την τελική αποκόλληση των καλυπτρών και έγινε μέτρηση της μέγιστης αυτής δύναμης αποκόλλησης.
description: The purpose of this in vitro study was to evaluate the impact of the remaining tooth structure on the retention of overdenture cast metal copings. A freshly extracted intact mandibular human canine was selected and endodontically treated. An incisal reduction of 5 mm with no ferrule preparation was performed and a post space of 12 mm was created. By using polyvinyl siloxane duplication material and autopolymerizing polymethylmethacrylate resin, ten resin teeth analogs (control group) were obtained. A second set of ten resin teeth analogs (group 1) was created by preparing a 360o ferrule design of 1 mm in height, by using the same procedural technique. The canine tooth was further reduced by an additional 1 mm, resulting in a ferrule of 2 mm in height, measured from the initial incisal reduction, thus a third set of ten resin teeth analogs (group 2) was created. For every tooth analog in all groups a dome-shaped metal coping was cast and luted with a glass ionomer cement. All specimens were subjected to tensile load testing until decementation occurred.
Some Comments About The High Energy Limit of QCD
Creators: name: McLerran, Larry
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I argue that the physics of the scattering of very high energy strongly interacting particles is controlled by a new, universal form of matter, the Color Glass Condensate. This matter is the dominant contribution to the low x part of a hadron wavefunction. In collisions, this matter almost instantaneously turns into a Glasma. The Glasma initially has strong longitudinal color electric and magnetic fields, with topological charge. These fields melt into gluons. Due to instabilities, quantum noise is converted into classical turbulence, which may be responsible for the early thermalization seen in heavy ion collisions at RHIC.
THE ROLE AND MEANING OF NEW WORDS (NEOLOGISMS), THEIR USE IN PEOPLE'S LIVES
Creators: name: Akhmedova Feruza Ibragimovna , Azizova Guli
Publisher: name: Zenodo
Year: 2024

description: Abstract

The main goal of the article is the analysis of neologisms and novel applications that have emerged in the early years of independence and have been taken from renowned newspapers and periodicals. Lexical synonyms, nonce words, and lexical doublets emerged as a result of lexical tumors. It was able to learn what semantic and stylistic distinction is occurring in new words and meanings thanks to theirinvestigation.Keywords:  neologism, new use, neology, dictionary.
Η Λογοτεχνία της πόλης στο βιβλίο του Raymond Bozier «Fenêtres sur le monde»
Creators: name: Ζαφείρη, Μυρτώ Χρίστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Λογοτεχνική πόλη
Σχολιασμένη μετάφραση
Λογοτεχνική μετάφραση
Literary city

description: Σκοπός της παρούσας εργασίας ήταν η σχολιασμένη μετάφραση επιλεγμένων κεφαλαίων ενός λογοτεχνικού έργου από την γαλλική στην ελληνική γλώσσα. Τα κεφάλαια που επιλέχθηκαν προς μετάφραση είναι από το έργο Fenêtres sur le monde του Raymond Bozier. Στο θεωρητικό μέρος επιχειρείται μια ανάλυση των στοιχείων εκείνων που καθιστούν μια πόλη λογοτεχνική, αναδεικνύοντας την ποιητική της πόλης. Ακολουθεί η μετάφραση των επιλεγμένων κεφαλαίων. Η εργασία ολοκληρώνεται με τον σχολιασμό της μετάφρασης και των μεταφραστικών δυσκολιών.
description: The aim of the present thesis was the annotated translation of some chapters of a literary book from French into Greek language. The chosen chapters are taken from the book Fenêtres sur le monde of Raymond Bozier. In the first part, there is an analysis of the elements that compose the poetry of a city. In the second part, the translation is of the chapters is given and the thesis is completed with the annotation of the translation and of the difficulties of the procedure.
On the IR behaviour of the Landau-gauge ghost propagator
Creators: name: Boucaud, Ph.
name: Leroy, J. P.
name: Yaouanc, A. Le
name: Micheli, J.
name: Pène, O.
name: Rodríguez-Quintero, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine analytically the ghost propagator Dyson-Schwinger Equation (DSE) in the deep IR regime and prove that a finite ghost dressing function at vanishing momentum is an alternative solution (solution II) to the usually assumed divergent one (solution I). We furthermore find that the Slavnov-Taylor identities discriminate between these two classes of solutions and strongly support the solution II. The latter turns out to be also preferred by lattice simulations within numerical uncertainties.
description: 15 pages, Axodraw needed
Diffusion-free scaling in rotating spherical Rayleigh-Bénard convection
Creators: name: Wang, Guiquan
name: Santelli, Luca
name: Lohse, Detlef
name: Verzicco, Roberto
name: Stevens, Richard J. A. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Direct numerical simulations are employed to reveal three distinctly different flow regions in rotating spherical Rayleigh-Bénard convection. In the low-latitude region $\mathrm{I}$ vertical (parallel to the axis of rotation) convective columns are generated between the hot inner and the cold outer sphere. The mid-latitude region $\mathrm{II}$ is dominated by vertically aligned convective columns formed between the Northern and Southern hemispheres of the outer sphere. The diffusion-free scaling, which indicates bulk-dominated convection, originates from this mid-latitude region. In the equator region $\mathrm{III}$ the vortices are affected by the outer spherical boundary and are much shorter than in region $\mathrm{II}$. Thermally driven turbulence with background rotation in spherical Rayleigh-Bénard convection is found to be characterized by three distinctly different flow regions. The diffusion-free scaling, which indicates the heat transfer is bulk-dominated, originates from the mid-latitude region in which vertically aligned vortices are stretched between the Northern and Southern hemispheres of the outer sphere.\ These results show that the flow physics in rotating convection are qualitatively different in planar and spherical geometries. This finding underlines that it is crucial to study convection in spherical geometries to better understand geophysical and astrophysical flow phenomena.
description: 11pages, 6figures
Spin-down Rate of Pinned Superfluid
Creators: name: Jahan-Miri, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The spinning down (up) of a superfluid is associated with a radial motion of its quantized vortices. In the presence of pinning barriers against the motion of the vortices, a spin-down may be still realized through ``random unpinning'' and ``vortex motion,'' as two physically separate processes, as suggested recently. The spin-down rate of a pinned superfluid is calculated, in this framework, by directly solving the equation of motion applicable to only the unpinned moving vortices, at any given time. The results indicate that the pinned superfluid in the crust of a neutron star may as well spin down at the same steady-state rate as the rest of the star, through random unpinning events, while pinning conditions prevail and the superfluid rotational lag is smaller than the critical lag value.
description: to appear in ApJ (vol. 649 ?)
The Effect of Lensing on the Large-Scale CMB Anisotropy
Creators: name: Shanks, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We first compare the CMB lensing model of Seljak (1996) with the empirical model of Lieu & Mittaz (2005) to determine if the latter approach implies a larger effect on the CMB power-spectrum. We find that the empirical model gives significantly higher results for the magnification dispersion, assuming standard cosmological parameters. However, when the empirical foreground model is modelled via correlation functions and used in the Seljak formalism, the agreement is considerably improved. Thus we conclude that the main difference may be in the assumed foregrounds. We then discuss a foreground mass distribution which gives a lensing dispersion which is constant with angle. In Seljak's formalism, we show this can lead to a smoothing of the CMB power-spectrum which may be able to move the first acoustic peak to smaller l, if the mass clustering amplitude is high enough. Evidence for such a high amplitude comes from the QSO magnification results of Myers et al (2003, 2005) who suggest that foreground galaxy groups may be more massive than expected, implying that Omega_m ~ 1 and strong galaxy anti-bias. We then show that an inflationary model with neither CDM nor a cosmological constant and that predicts a primordial first peak at l=330 may fit the first acoustic peak of the WMAP data. This fit may be regarded as somewhat contrived since it also requires high redshift reionisation at the upper limit of what is allowed by the WMAP results. But given the finely-tuned nature of the standard LCDM model, the contrivance may be small in comparison and certainly the effect of lensing and other foregrounds may still have a considerable influence on the cosmological interpretation of the CMB.
description: 8 pages, 2 figures, updated references, now accepted by MNRAS
Improved Acyclicity Reasoning for Bayesian Network Structure Learning with Constraint Programming
Creators: name: Trösser, Fulya
name: de Givry, Simon
name: Katsirelos, George
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Bayesian networks are probabilistic graphical models with a wide range of application areas including gene regulatory networks inference, risk analysis and image processing. Learning the structure of a Bayesian network (BNSL) from discrete data is known to be an NP-hard task with a superexponential search space of directed acyclic graphs. In this work, we propose a new polynomial time algorithm for discovering a subset of all possible cluster cuts, a greedy algorithm for approximately solving the resulting linear program, and a generalised arc consistency algorithm for the acyclicity constraint. We embed these in the constraint programmingbased branch-and-bound solver CPBayes and show that, despite being suboptimal, they improve performance by orders of magnitude. The resulting solver also compares favourably with GOBNILP, a state-of-the-art solver for the BNSL problem which solves an NP-hard problem to discover each cut and solves the linear program exactly.
Spin-2 particles in gravitational fields
Creators: name: Papini, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We give a solution of the wave equation for massless, or massive spin-2 particles propagating in a gravitational background. The solution is covariant, gauge-invariant and exact to first order in the background gravitational field. The background contribution is confined to a phase factor from which geometrical and physical optics can be derived. The phase also describes Mashhoon's spin-rotation coupling and, in general, the spin-gravity interaction.
description: 8 pages, 1 figure
Entanglement entropy of asymptotically flat non-extremal and extremal black holes with an island
Creators: name: Kim, Wontae
name: Nam, Mungon
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The island rule for the entanglement entropy is applied to an eternal Reissner-Nordström black hole. The key ingredient is that the black hole is assumed to be in thermal equilibrium with a heat bath of an arbitrary temperature and so the generalized entropy is treated as being off-shell. Taking the on-shell condition to the off-shell generalized entropy, we find the generalized entropy and then obtain the entanglement entropy following the island rule. For the non-extremal black hole, the entanglement entropy grows linearly in time and can be saturated after the Page time as expected. The entanglement entropy also has a well-defined Schwarzschild limit. In the extremal black hole, the island prescription provides a logarithmically growing entanglement entropy in time and a constant entanglement entropy after the Page time. In the extremal black hole, the boundary of the island hits the curvature singularity where the semi-classical approximations appear invalid. To avoid encountering the curvature singularity, we apply this procedure to the Hayward black hole regular at the origin. Consequently, the presence of the island in extremal black holes can provide a finite entanglement entropy, which might imply non-trivial vacuum configurations of extremal black holes.
description: 20 pages, 4 figures, references and comments added
Λαθροϋλοτομία και πως επηρεάζει την αξιοποίηση του Φυσικού Περιβάλλοντος
Creators: name: Λεζίμη, Αθανασία Ευάγγελου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Παράνομη υλοτομία
Δασικά προϊόντα
Δράσεις πρόληψης
Αξιοποίηση
Φυσικό περιβάλλον
Illegal logging
Forest products
Prevention actions
Exploitation
Natural environment

description: Στην μεταπτυχιακή διατριβή αναλύονται τα δεδομένα που αφορούν σε παράνομες υλοτομίες και διακίνηση δασικών προϊόντων και με ποιο τρόπο επηρεάζεται η αξιοποίηση του φυσικού περιβάλλοντος. Τα εν λόγω στοιχεία αναφέρονται στους ελέγχους υπαίθρου, στις μηνύσεις, στο είδος και την ποσότητα των κατασχεθέντων προϊόντων, καθώς και στο περιεχόμενο καταγγελιών προερχόμενων από πολίτες. Τα ευρήματα της παρούσας εργασίας αφορούν σε δασικές περιοχές ανά την Ελλάδα και προκύπτουν από την επεξεργασία πρωτογενών δεδομένων που συλλέχθηκαν από τις δασικές υπηρεσίες. Η σπουδαιότητα των αποτελεσμάτων αυτής της εργασίας έγκειται στο ότι τα συμπεράσματα που προκύπτουν από την επεξεργασία πρωτογενών δεδομένων καταδεικνύουν τα προβλήματα που δημιουργεί η παράνομη υλοτομία στο φυσικό περιβάλλον και προωθείται η λήψη δράσεων πρόληψης και αποτροπής φαινομένων παράνομής υλοτομίας και διακίνησης δασικών προϊόντων. Επιπλέον, τα παραπάνω συμπεράσματα μπορούν να εφαρμοστούν στη πράξη, προκειμένου να ενισχύσουν το λειτουργικό ρόλο των περιφερειακών δασικών υπηρεσιών, διότι εντοπίζονται οι περιοχές αρμοδιότητάς τους, όπου το φαινόμενο είναι πιο έντονο και καθίσταται αποτελεσματικότερη η συνεργασία τους µε τις υπόλοιπες εμπλεκόμενες υπηρεσίες. Οπότε η συνεχής συλλογή και επεξεργασία τέτοιου είδους δεδομένων μπορεί επιπρόσθετα να συμβάλλει στην προώθηση στοχευµένων πολιτικών προστασίας των ελληνικών δασών από την παράνομη υλοτομία με σκοπό τη προστασία του φυσικού περιβάλλοντος.
description: The postgraduate thesis analyses the data related to illegal logging and trafficking of forest products and how the utilization of the natural environment be affected. This information relates to rural inspections, lawsuits, the type and quantity of products are seized, and the content of complaints from citizens. The findings of the present work relate to forest areas across Greece and result from the processing of primary data collected from forest services. The significance of the results of this research is that the conclusions drawn from the processing of primary data point to the problems created by illegal logging in the natural environment and promote prevention of illegal logging and trafficking in forest products. In addition, the above conclusions applied in practice to enhance the operational role of regional forestry services by identifying areas of their competence, where the phenomenon is more pronounced and their co-operation with other services involved becomes more effective. Therefore, the continuous collection and processing of such data can additionally contribute to the promotion of targeted policies to protect Greek forests from illegal logging in order to protect the natural environment.
Simultaneous readout of two charge qubits
Creators: name: Li, J.
name: Johansson, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider a system of two solid state charge qubits, coupled to a single read-out device, consisting of a single-electron transistor (SET). The conductance of each tunnel junction is influenced by its neighboring qubit, and thus the current through the transistor is determined by the qubits' state. The full counting statistics of the electrons passing the transistor is calculated, and we discuss qubit dephasing, as well as the quantum efficiency of the readout. The current measurement is then compared to readout using real-time detection of the SET island's charge state. For the latter method we show that the quantum efficiency is always unity. Comparing the two methods a simple geometrical interpretation of the quantum efficiency of the current measurement appears. Finally, we note that full quantum efficiency in some cases can be achieved measuring the average charge of the SET island, in addition to the average current.
description: 11 pages with 5 figures
Υλοποίηση εργαλείων προσομοίωσης WDM δικτύων σε Simulink
Creators: name: Γκέγκα, Χρυσούλα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Πολυπλεξία διαίρεσης μήκους κύματος
4ου επιπέδου διαμόρφωση πλάτους παλμών
Γκαουσιανός παλμός
Wavelength division multiplexing
4th level pulse amplitude modulation
Gaussian pulse

description: Καθώς η ανάγκη για μετάδοση δεδομένων με υψηλότερους ρυθμούς γίνεται ολοένα και πιο επιτακτική, είναι κρίσιμη η αναζήτηση λύσεων που θα αντιμετωπίσουν αυτό το πρόβλημα. Μία πολύ καλή πρόταση για την κάλυψη των σημερινών αναγκών σε εύρος ζώνης αποτελεί η χρήση της οπτικής ίνας συνδυαστικά με την τεχνική WDM και την προηγμένη τεχνολογία διαμόρφωσης σήματος PAM4. Από την μία, η WDM επιτυγχάνει την αποτελεσματικότερη χρήση του μεγάλου εύρους ζώνης που είναι διαθέσιμο στην οπτική ίνα, μεταδίδοντας ταυτόχρονα πολλαπλά σήματα μέσω της ίδιας ίνας, και από την άλλη, η PAM4 διαμόρφωση διπλασιάζει την ταχύτητα διαδίδοντας δύο δυαδικά ψηφία σε κάθε διάστημα μετάδοσης. Στην εργασία αυτή λοιπόν παρουσιάζεται η υλοποίηση ενός μοντέλου με PAM4 διαμόρφωση συνδυαστικά με την τεχνική CWDM τεσσάρων καναλιών εκπομπής, για μετάδοση δεδομένων με ρυθμούς 400Gb/s μέσω μονότροπης οπτικής ίνας στο περιβάλλον του Simulink. Στην προσομοίωση, η οπτική ίνα παραμετροποιείται ειδικά για κάθε κανάλι, το οποίο διαδίδεται μόνο του κάθε φορά με ταχύτητα μετάδοσης 100 Gb/s, ενώ στο σύστημα προστίθενται και αρνητικές επιπτώσεις (εξασθένηση και διασπορά), για να εξεταστεί τόσο η επίδοσή του, όσο και η εμβέλεια της οπτικής ίνας κατά τη διάδοση του οπτικού σήματος. Τέλος, παρατίθενται τα αποτελέσματα και εξάγονται συμπεράσματα από την προσομοίωση του μοντέλου.
description: As the need for transmission with higher data rates becomes more demanding, it is crucial to look for solutions that can deal with this problem. One solution can be the use of optical fiber combined with WDM technique and advanced PAM4 modulation. WDM makes the most efficient use of the large bandwidth available of the fiber, transmitting multiple signals simultaneously through the same fiber, while PAM4 modulation doubles the data rate by transmitting two bits on each transmission interval. Therefore, in this paper it is presented the implementation of a simulink model with PAM4 modulation and 4-channel CWDM, for data transmission at 400 Gb/s over single-mode fiber. In the simulation, the optical fiber is specially configured for each channel, which is transmitted alone each time at 100 Gb/s transmission speed. Negative effects (attenuation and dispersion) are added to the system in order to examine its performance and the range of the fiber while transmitting the optical signal. Finally, results are presented and conclusions are drawn from the model simulation.
$\mathrm{SU}(4)$-Symmetric Quantum Spin-Orbital Liquids on Various Lattices
Creators: name: Yamada, Masahiko G.
name: Oshikawa, Masaki
name: Jackeli, George
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: An emergent $\mathrm{SU}(4)$ symmetry discovered in the microscopic model for $d^1$ honeycomb materials [M.~G.~Yamada, M.~Oshikawa, and G.~Jackeli, Phys. Rev. Lett. \textbf{121}, 097201 (2018).] has enabled us to tailor exotic $\mathrm{SU}(4)$ models in real materials. In the honeycomb structure, the emergent $\mathrm{SU}(4)$ Heisenberg model would potentially have a quantum spin-orbital liquid ground state due to the \textit{multicomponent frustration}, and we can expect similar spin-orbital liquids also in three-dimensinal versions of the honeycomb lattice. In such quantum spin-orbital liquids, both the spin and orbital degrees of freedom become fractionalized and entangled together due to the strong frustrated interactions between them. Similarly to spinons in pure quantum spin liquids, quantum spin-orbital liquids can host not only spinon excitations, but also fermionic \textit{orbitalon} excitations at low temperature.
description: 17 pages, 11 figures, 2 tables. Full paper of Phys. Rev. Lett. 121, 097201 (arXiv:1709.05252) and a PhD thesis (arXiv:2004.01716) with substantially more details and extensions
Additional file 2 of Human menstrual blood-derived stem cells mitigate bleomycin-induced pulmonary fibrosis through anti-apoptosis and anti-inflammatory effects
Creators: name: Chen, Xin
name: Wu, Yi
name: Wang, Yanling
name: Chen, Lijun
name: Zheng, Wendi
name: Zhou, Sining
name: Xu, Huikang
name: Li, Yifei
name: Yuan, Li
name: Xiang, Charlie
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Marine Biology
subject: Cancer
subject: Hematology

description: Additional file 2.
Controllability for chains of dynamical scatterers
Creators: name: Eckmann, Jean-Pierre
name: Jacquet, Philippe A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences
subject: 70Q05, 37D50, 82C70

description: In this paper, we consider a class of mechanical models which consists of a linear chain of identical chaotic cells, each of which has two small lateral holes and contains a rotating disk at its center. Particles are injected at characteristic temperatures and rates from stochastic heat baths located at both ends of the chain. Once in the system, the particles move freely within the cells and will experience elastic collisions with the outer boundary of the cells as well as with the disks. They do not interact with each other but can transfer energy from one to another through collisions with the disks. The state of the system is defined by the positions and velocities of the particles and by the angular positions and angular velocities of the disks. We show that each model in this class is controllable with respect to the baths, i.e. we prove that the action of the baths can drive the system from any state to any other state in a finite time. As a consequence, one obtains the existence of at most one regular invariant measure characterizing its states (out of equilibrium).
Statistics of extremes under random censoring
Creators: name: Einmahl, John H. J.
name: Fils-Villetard, Amélie
name: Guillou, Armelle
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: We investigate the estimation of the extreme value index when the data are subject to random censorship. We prove, in a unified way, detailed asymptotic normality results for various estimators of the extreme value index and use these estimators as the main building block for estimators of extreme quantiles. We illustrate the quality of these methods by a small simulation study and apply the estimators to medical data.
description: Published in at http://dx.doi.org/10.3150/07-BEJ104 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Δηλητηρίαση από βαρέα μέταλλα – Ηθικά ζητήματα και νομικές προεκτάσεις
Creators: name: Κετσιατζή, Εμμανουέλα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Κλινική Φαρμακολογία
Βιομηχανική Φαρμακολογία
Καταγραφή
Βαρέα Μέταλλα – Τοξικότητα - Δηλητηρίαση
Δολοφονία - Νόμος – Ποινή - Δικαιοσύνη
Clinical Pharmacology
Industrial Pharmacology
Reference
Heavy Metal - Toxicity - Poisoning
Murder - Law - Sentence - Justice

description: Η παρούσα διπλωματική εργασία τιτλοφορείται ΄΄ ΔΗΛΗΤΗΡΙΑΣΗ ΑΠΟ ΒΑΡΕΑ ΜΕΤΑΛΛΑ ΗΘΙΚΑ ΖΗΤΗΜΑΤΑ ΚΑΙ ΝΟΜΙΚΕΣ ΠΡΟΕΚΤΑΣΕΙΣ΄΄ και εκπονείται υπό του πλαίσιο του προγράμματος μεταπτυχιακών σπουδών της Σχολής Επιστημών Υγείας του Αριστοτελείου Πανεπιστημίου Θεσσαλονίκης ΄΄Κλινική και Βιομηχανική Φαρμακολογία – Κλινική Τοξικολογία΄΄. Αποτελείται από έξι [6] ενότητες – κεφάλαια στα οποία πραγματεύεται Α] τα γενικά χαρακτηριστικά της τοξικής απόκρισης, το δηλητήριο και ιστορικά στοιχεία [ κεφ. 1ο ], Β] τα βαρέα μέταλλα σε σχέση με το περιβάλλον, τον βιοχημικό τους ρόλο, τις πηγές και τρόπους διακίνησης, την τοξικότητα, τους μηχανισμούς τοξικής δράσης επιπτώσεις και την ειδικότερη μορφή δηλητηρίασης από αυτά [ κεφ. 2ο ], Γ] ειδικότερη αναφορά στα κάτωθι βαρέα μέταλλα ήτοι αντιμόνιο, αρσενικό, θάλλιο, κάδμιο, μόλυβδο, υδράργυρο και χρώμιο [ κεφ. 3ο ], Δ] αναφορές περιστατικών δηλητηρίασης από βαρέα μέταλλα [ κεφ. 4ο ], Ε] δεδραμένα της ελληνικής πραγματικότητας από ιατρική και νομική άποψη και περαιτέρω αναφορά στην ιατρική οπτική γωνία και το νομικό πρίσμα [ κεφ. 5ο ], ΣΤ] τη δηλητηρίαση από βαρέα μέταλλα ως μέθοδο εγκληματικής δράσης και της εξ’ αυτής νομικές και μελλοντικές νομικές προεκτάσεις σε συνδυασμό με την ηθική στο ποινικό δίκαιο [ κεφ. 6ο ] και εν κατακλείδι τα συμπεράσματα στο διάλογο και τη σύζευξη της ιατρικής με τη νομική επιστήμη στην υπηρεσία του νόμου και της ευταξίας επ’ αγαθώ της κοινωνίας.
description: This dissertation is titled ‘’Heavy Metal poisoning – Ethical Issues and Legal Extensions’’ and is being prepared in the context of the postgraduate Diploma Program. It consists of six [6] chapters in which it deals with i] the general character of the toxic response to poison and historical data ii] heavy metals in relation to the environment their biochemical role, sources and modes of toxicity, mechanisms of toxic effects and the specific form of poisoning from them iii] more specific reference to antimony, arsenic, thallium, cadmium, mercury, lead and chromium iiii] reports of heavy metal poisoning v] what is happening in Greek reality from a medical and legal point of view vi] heavy metal poisoning as a method of criminal activity, legal and legal future implications combined with criminal law ethics and consequently the conjunction of medical and legal science in the service of law for the good of society.
Approximate spatial reasoning using vague objects
Creators: name: Kennedy, Kevin
Publisher: name: University of British Columbia
Year: 2009

description: A method is proposed for implementing spatial reasoning and spatial knowledge representation on a computer which utilizes a new concept named vague objects. Vague objects are an approximate representation system both for solid objects and for spatial relationships between two or more solid objects. A vague object is a simplified solid ob ject where sharp surfaces are replaced with smooth transitions from the solid to its sur roundings. A vague object can be compared to a cloud with a smoothly varying density that resembles a real solid object. Vague objects can be used to represent spatial concepts as well. A spatial concept is defined as a relation between objects, either solid or vague. Many spatial concepts can be visualized as vague objects, and for simple spatial reasoning, they can be implemented as such. Spatial reasoning with vague objects can be performed using a spatial logic that re sembles Venn diagrams in three dimensions. Spatial reasoning by means of vague objects can be executed sequentially in chains allowing complex spatial descriptions to be evalu ated in a visually understandable fashion. The reasoning system used is reminiscent of fuzzy logic, except that its domain of operation is in three dimensional space. Vague objects simulate some aspects of human spatial reasoning using methods in tended for implementation on a computer. This human-centred approach makes vague objects useful not only for emulating humans but, more importantly, for interacting with them.
FIRST: Fast Iterative Reconstruction Software for (PET) tomography
Creators: name: Herraiz, J. L.
name: Espana, S.
name: Vaquero, J. J.
name: Desco, M.
name: Udias, J. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Medical Physics (physics.med-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Small animal PET scanners require high spatial resolution and good sensitivity. To reconstruct high-resolution images in 3D-PET, iterative methods, such as OSEM, are superior to analytical reconstruction algorithms, although their high computational cost is still a serious drawback. The higher performance of modern computers could make iterative image reconstruction fast enough to be viable, provided we are able to deal with the large number of probability coefficients for the system response matrix in high-resolution PET scanners, which is a difficult task that prevents the algorithms from reaching peak computing performance. Considering all possible axial and in-plane symmetries, as well as certain quasi-symmetries, we have been able to reduce the memory requirements to store the system response matrix (SRM) well below 1 GB, which allows us to keep the whole response matrix of the system inside RAM of ordinary industry-standard computers, so that the reconstruction algorithm can achieve near peak performance. The elements of the SRM are stored as cubic spline profiles and matched to voxel size during reconstruction. In this way, the advantages of on-the-fly calculation and of fully stored SRM are combined. The on-the-fly part of the calculation (matching the profile functions to voxel size) of the SRM accounts for 10 to 30% of the reconstruction time, depending on the number of voxels chosen. We tested our approach with real data from a commercial small animal PET scanner. The results (image quality and reconstruction time) show that the proposed technique is a feasible solution.
description: 19 pages, 10 figures
Structure-Composition-Property Relationships in Antiperovskite Nitrides: Guiding a Rational Alloy Design
Creators: name: Zhong, Hongxia
name: Feng, Chunbao
name: Wang, Hai
name: Han, Dan
name: Yu, Guodong
name: Xiong, Wenqi
name: Li, Yunhai
name: Yang, Mao
name: Tang, Gang
name: Yuan, Shengjun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The alloy strategy through A- or X-site is a common method for experimental preparation of high-performance and stable lead-based perovskite solar cells. As one of the important candidates for lead-free and stable photovoltaic absorber, the inorganic antiperovskite family has recently been reported to exhibit excellent optoelectronic properties. However, the current reports on the design of antiperovskite alloys are rare. In this work, we investigated the previously overlooked electronic property (e.g., conduction band convergence), static dielectric constant, and exciton binding energy in inorganic antiperovskite nitrides by first-principles calculations. Then, we reveal a linear relationship between tolerance factor and various physical quantities. Guided by the established structure-composition-property relationship in six antiperovskite nitrides X3NA (X2+ = Mg2+, Ca2+, Sr2+; A3- = P3-, As3-, Sb3-, Bi3-), for the first time, we design a promising antiperovskite alloy Mg3NAs0.5Bi0.5 with the quasi-direct band gap of 1.402 eV. Finally, we make a comprehensive comparison between antiperovskite nitrides and conventional halide perovskites for pointing out the future direction for device applications.