cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Τα προδικαστικά ζητήματα στην ποινική δίκη και η δεσμευτικότητά τους – Η περίπτωση του άρθρου 366 παρ. 2 ΠΚ
Creators: name: Σαμαρά, Σοφία Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Προδικαστικά Ζητήματα
Τεκμήρια Ενοχής
Τεκμήριο Αθωότητας
Ρreliminary Issues
Pressumption of Responsibility
Pressumption of Innocence

description: Η συγκεκριμένη διπλωματική εργασία θίγει το ζήτημα των προδικαστικών ζητημάτων και το κατά πόσο αυτά δύνανται να δεσμεύσουν τη δικάζουσα σύνθεση στην διαμόρφωση της τελικής δικανικής πεποίθησης, εν μέσω ενός αποδεικτικού συστήματος, σαν του ελληνικού,που έχει ως βασική αρχή , την αρχή της ηθικής απόδειξης, ήτοι τη μη δέσμευση του δικαστηρίου από αποδεικτικούς κανόνες, καθώς και το απεριόριστο των αποδεικτικών μέσων. Επιπρόσθετα, με την προσεκτική επισκόπηση της νομολογίας του Ευρωπαϊκού Δικαστηρίου γίνεται εκτενέστατη παράθεση της συμβατότητας τυχόν τεκμηρίων ενοχής που υπάρχουν στις έννομες τάξεις των κρατών μελών, με το άρθρο 6 παρ. 1 και 2 της Ευρωπαϊκής Σύμβασης των Δικαιωμάτων του Ανθρώπου, δηλαδή με τις έννοιες της δίκαιης δίκης και του τεκμηρίου αθωότητας. Σχετικά με την εγχώρια έννομη τάξη, παρουσιάζονται όλες οι νομοθετικές μεταβολές που επήλθαν με το Ν. 4596/2019, κατ’ εφαρμογή της Οδηγίας του Συμβουλίου της Ευρώπης 343/2016, καθώς και με το Ν. 4619/2020 που οδήγησε το σύνολο του ελληνικού Ποινικού Κώδικα σε θορυβώδεις αλλαγές. Επιπλέον, θίγεται και η προβληματική που έχει δημιουργηθεί σε περιπτώσεις που μία υπόθεση κρίνεται και από την ποινική της σκοπιά αλλά και από την αστική της. Υπάρχει αναγκαιότητα χάριν ασφάλειας δικαίου να συμπλέουν τα σκεπτικά των αποφάσεων ή μπορούν αυτά να αχθούν σε πλήρως αντιφατικές δικανικές κρίσεις;
description: Τhe hereby dissertation is about the preliminary issues and their binding effect at the formulation of the final verdict in a criminal court. Τhis matters a lot, especially in a criminal legal system like the Greek one, where the judge is not obliged to follow certain rules referred to the bindict effect of the means of proof in a trial. In addition to this, there is a detailed presentation of the European Court case – law, and also the issue of the compatibility οf existing in the European countries legal systems presumptions of guilt, with the art. 6 par. 1 and 2 of the ECHR, in other words with the right in a fair trial and with the presumption of innocence. According to the Greek legal system, there have been some amendments due to the Law 4596/2019, which integrated the Direction of the European Council 343/2016, and also due to the Law 4619/2020, which changed completely the Greek Criminal Law. Also, it is referred to the important issue of the situations that one case has and a criminal status, but also a civil status. Is there a need of protecting the legal certainty due to the resemblance of the verdicts of different courts or can the verdicts be completely different with each other?
Φιλελεύθερος και ριζοσπαστικός φεμινισμός. Παραδείγματα θεσμικής απόκρισης στην Ελλάδα της Μεταπολίτευσης
Creators: name: Τασιοπούλου, Αλεξάνδρα Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Φιλελεύθερος φεμινισμός
Ριζοσπαστικός φεμινισμός
Ελληνικό δίκαιο της Μεταπολίτευσης
Liberal feminism
Radical feminism
Greek political transitional legislation

description: Ο φεμινισμός, το θεωρητικό απόσταγμα του γυναικείου λόγου, που έχει διανύσει πάνω από δύο αιώνες διαδρομής, αποτέλεσε το έρεισμα της παρούσας εργασίας. Το εγχείρημα ξεκινά με τη συνοπτική ιστορική πορεία και εξέλιξη της φεμινιστικής σκέψης, η οποία πέρασε από διάφορα ‘’κύματα’’, καθένα από τα οποία έφερε διαφορετικούς προβληματισμούς, εντάσεις και διεκδικήσεις. Η φεμινιστική θεωρία μετέπειτα εισρέει σε ποικίλα ρεύματα, από τα οποία, ως επί το πλείστον, αναλύονται το φιλελεύθερο και το ριζοσπαστικό. Οι θέσεις, οι αντιθέσεις και οι κριτικές που ασκήθηκαν προς αυτά. Ακολούθως, συγκεκριμενοποιείται η συνεισφορά του φεμινισμού σε θεσμικό επίπεδο. Η φεμινιστική κριτική του δικαίου και η προώθηση πολιτικών ισότητας, έχοντας ως όραμα τη δημιουργία ενός νέου νομικού πολιτισμού, επηρέασαν τη μεταρρύθμιση της ελληνικής νομοθεσίας της μεταπολίτευσης. Ενδεικτικά γίνεται αναφορά σε βασικούς τομείς του δικαίου που άπτονται του πολιτικού και δημόσιου χώρου, της οικογένειας, της εργασίας καθώς και της αναπαραγωγής, της σεξουαλικότητας και της βίας κατά των γυναικών
description: Feminism, the theoretical distillate of women's discourse that has spanned more than two centuries, has been the basis of this work. The project begins with a brief historical course and evolution of feminist thought, which went through various "waves", each of which brought different concerns, tensions and claims. Feminist theory later infiltrates a variety of currents, from which, the liberal and the radical are extensively analyzed. The positions, contradictions and criticisms leveled at them. Subsequently, the contribution of feminism at the institutional level is concretized. The feminist critique of law and the promotion of equality policies, with the vision of creating a new legal culture, influenced the reform of greek political transitional legislation. Indicatively, a reference is made to key areas of law relating to politics and public space, family, work, as well as reproduction, sexuality and violence against women
How much of one-way computation is just thermodynamics?
Creators: name: Anders, Janet
name: Markham, Damian
name: Vedral, Vlatko
name: Hajdušek, Michal
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper we argue that one-way quantum computation can be seen as a form of phase transition with the available information about the solution of the computation being the order parameter. We draw a number of striking analogies between standard thermodynamical quantities such as energy, temperature, work, and corresponding computational quantities such as the amount of entanglement, time, potential capacity for computation, respectively. Aside from being intuitively pleasing, this picture allows us to make novel conjectures, such as an estimate of the necessary critical time to finish a computation and a proposal of suitable architectures for universal one-way computation in 1D.
description: 10 pages, 4 figures. Argument made clearer in line with referee comments, this final version is 4 pages longer
Το επεκτατικό αποτέλεσμα των ενδίκων μέσων κατά βουλευμάτων και αποφάσεων
Creators: name: Μυρίδης, Ιωάννης Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ποινική Δικονομία
Ένδικα μέσα
Επεκτατικό αποτέλεσμα
Criminal Procedure
Appeals
Expansionary effect

description: Αντικείμενο της παρούσας εργασίας είναι η ερμηνεία των άρθρων 469 και 493 ΚΠΔ, που αναφέρεται στο επεκτατικό αποτέλεσμα των ενδίκων μέσων. Γίνεται μνεία στην έννοια, το περιεχόμενο και τον σκοπό του επεκτατικού αποτελέσματος. Γίνεται αναφορά στην ιστορική πορεία της ρύθμισης και στις τροποποιήσεις που επέφερε ο ν. 1941/1991. Καταγράφονται το πεδίο εφαρμογής του επεκτατικού αποτελέσματος και οι περιπτώσεις επέκτασης που προβλέπει ο νόμος. Αναλύονται οι προϋποθέσεις εφαρμογής του επεκτατικού αποτελέσματος καθώς και οι κατηγορίες των προτεινόμενων λόγων και δη ο χαρακτήρας αυτών ανάλογα με την περίπτωση επέκτασης στην οποία αυτοί αφορούν. Διερευνάται η δυνατότητα αναλογικής εφαρμογής της διάταξης του αρ. 469 ΚΠΔ επί των ενδίκων μέσων που ασκούν πρόσωπα που δεν έχουν την ιδιότητα του κατηγορουμένου. Μελετάται η δικονομική θέση του ωφελούμενου από το επεκτατικό αποτέλεσμα, οι δυνατότητες που παρέχει σ’ αυτόν ο νόμος σε περίπτωση που παραλείφθηκε η επωφελής γι’ αυτόν επέκταση καθώς και οι συνέπειες από την παραβίαση του επεκτατικού αποτελέσματος. Τέλος, γίνεται αναφορά στην επέκταση του ενδίκου μέσου καθώς και στις διιστάμενες περί τούτου απόψεις
description: The aim of this paper is the interpretation of the Articles 469 and 493 of the Code of Criminal Procedure, which refers to the expansionary effect of appeals. Reference is made to the definition, the content and the purpose of the expansionary effect. Reference is made to the historical development of the rule and to the amendments which the law 1941/1991 induced. The scope of the expansionary effect and the cases of expansion which the law lays down are recorded. The conditions for the application of the expansionary effect as well as the categories of the pleas in law are analyzed and specifically their character according to the case of expansion they refer to. The possibility of proportionate application of the Article 469 of the Code of Criminal Procedure at the appeals which people who are not defendants make is reviewed. The beneficiary’s of the expansionary effect procedural status is examined, the possibilities which the law gives to him in case of no application of the expansionary effect and the effects from the infringement of the expansionary effect. Finally, reference is made to the expansion of the appeal and the diverging opinions concerning this issue
Charged Fermions Tunnelling from Kerr-Newman Black Holes
Creators: name: Kerner, Ryan
name: Mann, R. B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the tunnelling of charged spin-(1/2) fermions from a Kerr-Newman black hole and demonstrate that the expected Hawking temperature is recovered. We discuss certain technical subtleties related to the obtention of this result.
description: 13 pages, 1 figure v2: added references, v3: added figure, corrected minor equation errors (sign error and factor typo)
The effect of non-metallic particles on as-cast austenitic structure of low carbon steel
Creators: name: Komatsu, Nobuyuki
Publisher: name: University of British Columbia
Year: 2008

description: The effect of second-phase particles and cooling rate on the as-cast austenite grain size of peritectic plain-carbon steel has been examined. Remelting tests followed by continuous cooling and helium quenching were performed on a Gleeble 1500 Thermo mechanical Simulator. Two low alloy types of steel were used; both had basically the same basic chemical composition, but contained different amounts of titanium and calcium. The as-cast austenite grain size was characterized in terms of both the cooling rate, which was obtained by the Gleeble measuring system through the thermocouples welded on the sample surface, and the volume fraction and size distribution of second-phase particles which were obtained by electron metallography. The classical Zener equation and Gladman model were applied to explain the experimental results relating to the pinning effect of second-phase particle against as-cast austenitic grain growth. It was found that at relatively high cooling rates (4.5 °C/s — 17.5 °C/s), the effect of cooling rate was dominant in austenite grain growth behavior, while at slower cooling rates (0.4°C/s — 1.2 °C/s), the effect of second-phase particles in grain boundary pinning could be observed. Regarding the effect of second-phase particles, it was found that the titanium nitride, which is an effective precipitate for inhibiting austenite grain growth in the conventional continuous casting and reheating process, was not effective for pinning the coarse as-cast austenite grain growth. This was due to both the small volume fraction and the small size of titanium nitrides. On the other hand, oxides, which mainly were Ca-aluminates, were effective for pinning the as-cast austenite grain boundaries due to the large volume fraction and the relatively large particle size of oxides. The results were explained using the Gladman model.
The high-energy limit of inclusive and diffractive deep inelastic scattering in QCD
Creators: name: Marquet, Cyrille
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Following recent progresses in the understanding of high-energy scattering in QCD, we derive the first phenomenological consequences of Pomeron loops, in the context of both inclusive and diffractive deep inelastic scattering. In particular, we discuss diffusive scaling, a new scaling law that emerges for sufficiently high energies and up to very large values of $Q^2,$ well above the proton saturation momentum.
description: 4 pages, 3 figures, Proceedings of the XIVth International Workshop on Deep Inelastic Scattering (DIS06), Tsukuba, Japan, April 20-24 2006
An improved limit on the axion-photon coupling from the CAST experiment
Creators: name: CAST Collaboration
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have searched for solar axions or similar particles that couple to two photons by using the CERN Axion Solar Telescope (CAST) setup with improved conditions in all detectors. From the absence of excess X-rays when the magnet was pointing to the Sun, we set an upper limit on the axion-photon coupling of 8.8 x 10^{-11} GeV^{-1} at 95% CL for m_a
description: 24 pages, 8 figures, 1 table, to be submitted to JCAP; v2: minor changes in the exclusion plot; v3: minor changes to match accepted version
Stochastic Quantization of Relativistic Theories
Creators: name: Kuipers, Folkert
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It was shown recently that stochastic quantization can be made into a well defined quantization scheme on (pseudo-)Riemannian manifolds using second order differential geometry, which is an extension of the commonly used first order differential geometry. In this letter, we show that restrictions to relativistic theories can be obtained from this theory by imposing a stochastic energy-momentum relation. In the process, we derive non-perturbative quantum corrections to the line element as measured by scalar particles. Furthermore, we extend the framework of stochastic quantization to massless scalar particles.
description: v1: 12 pages. v2: clarifications added. v3: appendix added, to appear in J.Math.Phys
Time-dependent Spherically-symmetric 5-D Vacuum Solutions
Creators: name: Kokarev, Sergey S.
name: Krechet, Vladimir G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Vacuum 5-D Einstein equations with spherical symmetry and t-dependence are considered. For the case of separating variables several classes of exact solutions are obtained. Effective matter, induced by geometrical scalar field is analyzed.
Design and Performance of the Soft Gamma-ray Detector for the NeXT mission
Creators: name: Tajima, H.
name: Kamae, T.
name: Madejski, G.
name: Mitani, T.
name: Nakazawa, K.
name: Tanaka, T.
name: Takahashi, T.
name: Watanabe, S.
name: Fukazawa, Y.
name: Ikagawa, T.
name: Kataoka, J.
name: Kokubun, M.
name: Makishima, K.
name: Terada, Y.
name: Nomachi, M.
name: Tashiro, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Soft Gamma-ray Detector (SGD) on board the NeXT (Japanese future high energy astrophysics mission) is a Compton telescope with narrow field of view (FOV), which utilizes Compton kinematics to enhance its background rejection capabilities. It is realized as a hybrid semiconductor gamma-ray detector which consists of silicon and CdTe (cadmium telluride) detectors. It can detect photons in a wide energy band (0.05-1 MeV) at a background level of 5 x 10^-7 counts/cm^2/s; the silicon layers are required to improve the performance at a lower energy band (<0.3 MeV). Excellent energy resolution is the key feature of the SGD, allowing it to achieve both high angular resolution and good background rejection capability. An additional capability of the SGD, its ability to measure gamma-ray polarization, opens up a new window to study properties of astronomical objects. We will present the development of key technologies to realize the SGD: high quality CdTe, low noise front-end ASIC and bump bonding technology. Energy resolutions of 1.7 keV (FWHM) for CdTe pixel detectors and 1.1 keV for Si strip detectors have been measured. We also present the validation of Monte Carlo simulation used to evaluate the performance of the SGD.
description: 9 pages, 17 figures, Contributed to IEEE Nuclear Science Symposium, Roma, Italia, October 16-October 22, 2004
Εκτίμηση της διάχυσης πληροφορίας σε κοινωνικά δίκτυα
Creators: name: Τσολάκης, Πέτρος Ελευθερίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: κοινωνικά δίκτυα
διάχυση πληροφορίας
επιδημιολογικά μοντέλα
σημειακές ανελίξεις
social networks
information diffusion
epidemic models
point processes

description: Στην παρούσα διπλωματική εργασία μελετήθηκε το πρόβλημα της διάδοσης πληροφορίας στα κοινωνικά δίκτυα. Σκοπός της εργασίας ήταν να εκτιμηθεί ο αριθμός των χρηστών του δικτύου που μοιράστηκε ένα μήνυμα. Αρχικά παρουσιάζονται τα επιδημιολογικά μοντέλα που προσπαθούν να προσομοιώσουν την εξάπλωση ενός μηνύματος σαν τη διάδοση μιας ασθένειας. Στη συνέχεια αναλύονται οι αλγόριθμοι πρόβλεψης διάδοσης πληροφορίας, που έχοντας ως είσοδο την αρχική εξάπλωση του μηνύματος, προσπαθούν να εκτιμήσουν την τελική του διάδοση. Τέλος εφαρμόσαμε τους αλγορίθμους πρόβλεψης διάδοσης πληροφορίας και συγκρίναμε τα αποτελέσματα τους. Οι αλγόριθμοι δοκιμάστηκαν σε ένα πραγματικό σύνολο δεδομένων που περιλαμβάνει μηνύματα από το κοινωνικό δίκτυο Twitter
description: In this thesis we analyze the problem of information diffusion in social networks. The objective of the thesis was to evaluate the number of users that shared a message in the network. Firstly the epidemic models are presented that try to simulate the diffusion of a message like the spread of a infectious disease. Then the algorithms that predict the diffusion of information are analyzed. They have the initial spread of information as input and they try to predict the final size of the propagation of a message. Finally we applied the latter algorithms and we compared their results. The algorithms were tested on a real dataset that includes messages from Twitter social network
Quantum Circuits assisted by LOCC: Transformations and Phases of Matter
Creators: name: Piroli, Lorenzo
name: Styliaris, Georgios
name: Cirac, J. Ignacio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We introduce deterministic state-transformation protocols between many-body quantum states which can be implemented by low-depth Quantum Circuits (QC) followed by Local Operations and Classical Communication (LOCC). We show that this gives rise to a classification of phases in which topologically-ordered states or other paradigmatic entangled states become trivial. We also investigate how the set of unitary operations is enhanced by LOCC in this scenario, allowing one to perform certain large-depth QC in terms of low-depth ones.
description: 6+5 pages, no figures; v4: minor revision, references added
The Weyl curvature conjecture and black hole entropy
Creators: name: Rudjord, Oystein
name: Gron, Oyvind
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The universe today, with structure such as stars, galaxies and black holes, seems to have evolved from a very homogeneous initial state. From this it appears as if the entropy of the universe is decreasing, in violation of the second law of thermodynamics. It has been suggested by Roger Penrose \cite{grossmann:penrose:wcc} that this inconsistency can be solved if one assigns an entropy to the spacetime geometry. He also pointed out that the Weyl tensor has the properties one would expect to find in a description of a gravitational entropy. In this article we make an attempt to use this so-called Weyl curvature conjecture to describe the Hawking-Bekenstein entropy of black holes and the entropy of horizons due to a cosmological constant.
description: 10 pages, 2 figures, typesetting revtex4
An Iterative Method for the Construction of Equilibrium N-Body Models for Stellar Disks
Creators: name: Rodionov, S. A.
name: Sotnikova, N. Ya.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: One widely used technique for the construction of equilibrium models of stellar disks is based on the Jeans equations and the moments of velocity distribution functions derived using these equations. Stellar disks constructed using this technique are shown to be "not entirely" in equilibrium. Our attempt to abandon the epicyclic approximation and the approximation of infinite isothermal layers, which are commonly adopted in this technique, failed to improve the situation substantially. We conclude that the main drawback of techniques based on the Jeans equations is that the system of equations employed is not closed, and therefore requires adopting an essentially ad hoc additional closure condition. A new iterative approach to constructing equilibrium N-body models with a given density distribution is proposed. The main idea behind this approach is that a model is first constructed using some approximation method, and is then allowed to adjust to an equilibrium state with the specified density and the required parameters of the velocity distribution remaining fixed in the process. This iterative approach was used to construct isotropic, spherically symmetric models and models of stellar disks embedded in an external potential. The numerical models constructed prove to be close to equilibrium. It is shown that the commonly adopted assumption that the profile of the radial velocity dispersion is exponential may be wrong. The technique proposed can be applied to a wide range of problems involving the construction of models of stellar systems with various geometries.
description: 28 pages including 10 figures. To be published in Astronomy Reports (v. 50, No. 12, pp. 983-1000, 2006)
Transcription of file 020_A (collection LA 256)
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio file VP-290513-08: Transcription of file 020_A (tape 020, side A) from LA 256 (collection of recordings given to the Berkeley Language Center by Verdena), from the beginning of the recording to 2:16. Due to re-numbering, tape 020_A has been assigned to the CLA item number LA256.020, audio file LA256.020A.
Origin and evolution of the light nuclides
Creators: name: Prantzos, Nikos
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: After a short historical (and highly subjective) introduction to the field, I discuss our current understanding of the origin and evolution of the light nuclides D, He-3, He-4, Li-6, Li-7, Be-9, B-10 and B-11. Despite considerable observational and theoretical progress, important uncertainties still persist for each and every one of those nuclides. The present-day abundance of D in the local interstellar medium is currently uncertain, making it difficult to infer the recent chemical evolution of the solar neighborhood. To account for the observed quasi-constancy of He-3 abundance from the Big Bang to our days, the stellar production of that nuclide must be negligible; however, the scarce observations of its abundance in planetary nebulae seem to contradict this idea. The observed Be and B evolution as primaries suggests that the source composition of cosmic rays has remained quasi-constant since the early days of the Galaxy, a suggestion with far reaching implications for the origin of cosmic rays; however, the main idea proposed to account for that constancy, namely that superbubbles are at the source of cosmic rays, encounters some serious difficulties. The best explanation for the mismatch between primordial Li and the observed "Spite-plateau" in halo stars appears to be depletion of Li in stellar envelopes, by some yet poorly understood mechanism. But this explanation impacts on the level of the recently discovered early ``Li-6 plateau'', which (if confirmed), seriously challenges current ideas of cosmic ray nucleosynthesis.
description: 18 pages, 9 figs. Invited Review in "Symposium on the Composition of Matter", honoring Johannes Geiss on the occasion of his 80th birthday (Grindelwald, Switzerland, Sept. 2006), to be published in Space Science Series of ISSI
Interference effect in elastic parton energy loss in a finite medium
Creators: name: Wang, Xin-Nian
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Similar to the radiative parton energy loss due to gluon bremsstrahlung, elastic energy loss of a parton undergoing multiple scattering in a finite medium is demonstrated to be sensitive to interference effect. The interference between amplitudes of elastic scattering via a gluon exchange and that of gluon radiation reduces the effective elastic energy loss in a finite medium and gives rise to a non-trivial length dependence. The reduction is most significant for a propagation length $L< 4/πT$ in a medium with a temperature $T$. Though the finite size effect is not significant for the average parton propagation in the most central heavy-ion collisions, it will affect the centrality dependence of its effect on jet quenching.
description: 6 pages with two postscript figures. New version with few typos corrected and brief discussions added
Redshift Degeneracy in the Eiso-Epeak Relation of Gamma-Ray Bursts
Creators: name: Li, Li-Xin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this Letter we show that there is a redshift degeneracy in the Eiso-Epeak relation of gamma-ray bursts (GRBs). If a GRB has a redshift solved from the Eiso-Epeak relation that lies in the range of 0.9
description: 4 pages, 4 figures. Accepted by MNRAS Letters
A possible bias on the estimate of Lbol/Ledd in AGN as a function of luminosity and redshift
Creators: name: Lamastra, Alessandra
name: Matt, Giorgio
name: Perola, G. Cesare
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The BH mass (and the related Eddington ratio) in broad line AGN is usually evaluated by combining estimates (often indirect) of the BLR radius and of the FWHM of the broad lines, under the assumption that the BLR clouds are in Keplerian motion around the BH. Such an evaluation depends on the geometry of the BLR. There are two major options for the BLR configuration: spherically symmetric or ``flattened''. In the latter case the inclination to the line of sight becomes a relevant parameter. This paper is devoted to evaluate the bias on the estimate of the Eddington ratio when a spherical geometry is assumed (more generally when inclination effects are ignored), while the actual configuration is ``flattened'', as some evidence suggests. This is done as a function of luminosity and redshift, on the basis of recent results which show the existence of a correlation between the fraction of obscured AGN and these two parameters up to at least z=2.5. The assumed BLR velocity field is akin to the ``generalized thick disk'' proposed by Collin et al. (2006). Assuming an isotropic orientation in the sky, the mean value of the bias is calculated as a function of luminosity and redshift. It is demonstrated that, on average, the Eddington ratio obtained assuming a spherical geometry is underestimated for high luminosities, and overestimated for low luminosities. This bias converges for all luminosities at z about 2.7, while nothing can be said on this bias at larger redshifts due to the lack of data. The effects of the bias, averaged over the luminosity function of broad line AGN, have been calculated. The results imply that the bias associated with the a-sphericity of the BLR make even worse the discrepancy between the observations and the predictions of evolutionary models.
description: 6 pages, 3 figures, accepted for publication in A&A
Tails of Foreign Exchange-at-Risk (FEaR)
Creators: name: Ostry, D. A.
Publisher: name: Faculty of Economics, University of Cambridge
Year: 2023
Subjects: Exchange Rates
Disaster Risk
U.S.
Safety
Liquidity Yields
Quantile Regression

description: I build a model in which speculators unwind carry trades and hedgers fly to relatively liquid U.S. Treasuries during global financial disasters. The net effect of these flows produces an amplified U.S. dollar appreciation against high-yield currencies in disasters and a dampened depreciation, or even an appreciation, against low-yield ones. I verify this prediction by examining deviations from uncovered interest parity (UIP) within a novel quantile-regression framework. In the tail quantiles, I show that interest differentials predict high-yield currencies to suffer depreciations ten times as large as suggested by UIP, while spikes in Treasury liquidity premia meaningfully appreciate the dollar regardless of the U.S. relative interest rate. A complementary analysis of speculators’ and hedgers’ currency futures positions substantiates my model’s mechanism and highlights that hedging agents imbue the U.S. dollar with its unique safe-haven status.
Perturbation of multiparameter non-self-adjoint boundary eigenvalue problems for operator matrices
Creators: name: Kirillov, Oleg N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Astrophysics (astro-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences
subject: 34B08; 34D10

description: We consider two-point non-self-adjoint boundary eigenvalue problems for linear matrix differential operators. The coefficient matrices in the differential expressions and the matrix boundary conditions are assumed to depend analytically on the complex spectral parameter and on the vector of real physical parameters. We study perturbations of semi-simple multiple eigenvalues as well as perturbations of non-derogatory eigenvalues under small variations of the parameters. Explicit formulae describing the bifurcation of the eigenvalues are derived. Application to the problem of excitation of unstable modes in rotating continua such as spherically symmetric MHD alpha2-dynamo and circular string demonstrates the efficiency and applicability of the theory.
description: 17 pages, 4 figures, presented at the International Conference "Modern Analysis and Applications - MAA 2007" dedicated to the centenary of Mark Krein. Odessa, Ukraine, April 9-14, 2007. Minor typos corrected
Central meson production in diffractive reactions
Creators: name: Szczurek, Antoni
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I discuss double-diffractive (double-elastic) production of the $η'$ and $η_c$ mesons in the $pp \to p X p$ reaction within the formalism of unintegrated gluon distribution functions (UGDF). The contribution of $γ^* γ^* \to η'$ fusion is estimated. The distributions in the Feynman $x_F$ (or rapidity), transferred four-momenta squared between initial and final protons ($t_1$, $t_2$) and azimuthal angle difference between outgoing protons ($Φ$) are calculated and discussed. The results are compared with the WA102 data. Predictions at higher energies are presented.
description: 7 pages, 6 figures a talk at International Workshop on Diffraction in High-Energy Physics - DIFFRACTION 2006, Adamantas, Milos island, Greece, September 5-10, 2006
Analysis of White Dwarfs with Strange-Matter Cores
Creators: name: Mathews, G. J.
name: Suh, I. -S.
name: O'Gorman, B.
name: Lan, N. Q.
name: Zech, W.
name: Otsuki, K.
name: Weber, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We summarize masses and radii for a number of white dwarfs as deduced from a combination of proper motion studies, Hipparcos parallax distances, effective temperatures, and binary or spectroscopic masses. A puzzling feature of these data is that some stars appear to have radii which are significantly smaller than that expected for a standard electron-degenerate white-dwarf equations of state. We construct a projection of white-dwarf radii for fixed effective mass and conclude that there is at least marginal evidence for bimodality in the radius distribution forwhite dwarfs. We argue that if such compact white dwarfs exist it is unlikely that they contain an iron core. We propose an alternative of strange-quark matter within the white-dwarf core. We also discuss the impact of the so-called color-flavor locked (CFL) state in strange-matter core associated with color superconductivity. We show that the data exhibit several features consistent with the expected mass-radius relation of strange dwarfs. We identify eight nearby white dwarfs which are possible candidates for strange matter cores and suggest observational tests of this hypothesis.
description: 11 pages, 6 figures, accepted for publication in J. Phys. G: Nucl. Part. Phys
Anomalous diffusion of pions at RHIC
Creators: name: Csanad, M.
name: Csorgo, T.
name: Nagy, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: After pointing out the difference between normal and anomalous diffusion, we consider a hadron resonance cascade (HRC) model simulation for particle emission at RHIC and point out, that rescattering in an expanding hadron resonance gas leads to a heavy tail in the source distribution. The results are compared to recent PHENIX measurements of the tail of the particle emitting source in Au+Au collisions at RHIC. In this context, we show, how can one distinguish experimentally the anomalous diffusion of hadrons from a second order QCD phase transition.
description: 12 pages, 26 figures. Presented by T. Csorgo at the 2nd Workshop on Particle Femtoscopy and Correlations - WPCF in Sao Paulo, sept 2006. Brazilian Journal of Physics in press, minor misprints fixed
On the identification of the nonlinearity parameter in the Westervelt equation from boundary measurements
Creators: name: Kaltenbacher, Barbara
name: Rundell, William
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 35R30, 35K58, 35L72, Secondary: 78A46

description: We consider an undetermined coefficient inverse problem for a non-\\linear partial differential equation occurring in high intensity ultrasound propagation as used in acoustic tomography. In particular, we investigate the recovery of the nonlinearity coefficient commonly labeled as $B/A$ in the literature which is part of a space dependent coefficient $κ$ in the Westervelt equation governing nonlinear acoustics. Corresponding to the typical measurement setup, the overposed data consists of time trace measurements on some zero or one dimensional set $Σ$ representing the receiving transducer array. After an analysis of the map from $κ$ to the overposed data, we show injectivity of its linearisation and use this as motivation for several iterative schemes to recover $κ$. Numerical simulations will also be shown to illustrate the efficiency of the methods.
Discovery of 9 New Companions to Nearby Young M Stars with the Altair AO System
Creators: name: Daemgen, Sebastian
name: Siegler, Nick
name: Reid, I. Neill
name: Close, Laird M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results of a high-resolution, near-infrared survey of 41 nearby, young (= M6 very low-mass, VLM) populations. We find that the separation distribution of the binaries in this sample peaks at 13+14-9 AU, which is consistent with previous measurements of early-M binaries. Hence, early-M binaries seem to occur in--on average--tighter systems than G binaries. At the same time they are significantly wider than field VLM binary stars. The distribution of mass ratios q of primary and secondary stars was found to show an intermediate distribution between the strongly q-->1 peaked distribution of field VLM systems and the almost flat distribution of earlier-type stars. Consequently, we show evidence for relatively young, early-M binaries representing a transition between the well known earlier star distributions and the recently examined field VLM population characteristics. Despite the fact that this survey was dedicated to the search for faint brown dwarf and planetary mass companions, all planetary mass candidates were background objects. We exclude the existence of physical companions with masses greater than 10 Jupiter masses (M_Jup) at separations of >~40 AU and masses greater than 24 M_Jup for separations >~10 AU around 37 of the 41 observed objects.
description: To appear in the January 1, 2007 issue of the Astrophysical Journal, 12 pages, 13 figures. Minor typographical and grammatical changes. Wrong round off in binary fraction corrected
Validation of SSUSI-derived auroral electron densities: Comparisons to EISCAT data
Creators: name: Bender, Stefan
name: Espy, Patrick J.
name: Paxton, Larry J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The coupling of the atmosphere to the space environment has become recognized as an important driver of atmospheric chemistry and dynamics. In order to quantify the effects of particle precipitation on the atmosphere, reliable global energy inputs on spatial scales commensurate with particle precipitation variations are required. To that end, we have validated auroral electron densities derived from the SSUSI data products for average electron energy and electron energy flux by comparing them to EISCAT electron density profiles. This comparison shows that SSUSI FUV observations can be used to provide ionization rate and electron density profiles throughout the auroral region. The SSUSI on board the DMSP Block 5D3 satellites provide nearly hourly, 3000 km wide, 10 km x 10 km UV snapshots of auroral emissions. Here we use the SSUSI-derived energies and fluxes as input to standard parametrizations in order to obtain electron-density profiles in the E region (90--150 km), which are then compared to EISCAT ground-based electron density measurements. We compare the data from DMSP F17 and F18 to the Tromsø UHF radar profiles. We find that differentiating between the magnetic local time (MLT) morning (03:00--11:00 MLT) and evening (15:00--23:00 MLT) provides the best fit to the ground-based data. The data agree well in the MLT morning sector using a Maxwellian electron spectrum, while in the evening sector using a Gaussian spectrum and accounting for backscattered electrons achieved optimum agreement with EISCAT. Depending on the satellite and MLT, the median of the differences varies between 0% and 20% above 105 km (F17) and $\pm$15% above 100 km (F18). Because of the large density gradient below those altitudes, the relative differences get larger, albeit without a substantially increasing absolute difference, with virtually no statistically significant differences at the 1-sigma level.
description: 12 pages, 5 figures, publisehd in Ann. Geophys, 2021
The Probability of Choosing Primitive Sets
Creators: name: Elizalde, Sergi
name: Woods, Kevin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 11H06, 11P21, 52C07

description: We generalize a theorem of Nymann that the density of points in Z^d that are visible from the origin is 1/zeta(d), where zeta(a) is the Riemann zeta function 1/1^a + 1/2^a + 1/3^a + ... A subset S of Z^d is called primitive if it is a Z-basis for the lattice composed of the integer points in the R-span of S, or, equivalently, if S can be completed to a Z-basis of Z^d. We prove that if m points in Z^d are chosen uniformly and independently at random from a large box, then as the size of the box goes to infinity, the probability that the points form a primitive set approaches 1/[ζ(d)ζ(d-1)...zeta(d-m+1)].
description: 11 pages
Application of Quantitative Systems Pharmacology to guide the optimal dosing of COVID-19 vaccines
Creators: name: Giorgi, Mario
name: Desikan, Rajat
name: van der Graaf, Piet H.
name: Kierzek, Andrzej M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Optimal use and distribution of Covid-19 vaccines involves adjustments of dosing. Due to the rapidly-evolving pandemic, such adjustments often need to be introduced before full efficacy data are available. As demonstrated in other areas of drug development, quantitative systems pharmacology (QSP) is well placed to guide such extrapolation in a rational and timely manner. Here we propose for the first time how QSP can be applied real time in the context of COVID-19 vaccine development.
description: Perspective, 7 pages, 2 figures
On Halo Formation Times and Assembly Bias
Creators: name: Li, Yun
name: Mo, H. J.
name: Gao, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we use the ``Millennium Simulation'' to re-examine the mass assembly history of dark matter halos and the age dependence of halo clustering. We use eight different definitions of halo formation times to characterize the different aspects of the assembly history of a dark matter halo. We find that these formation times have different dependence on halo mass. While some formation times characterize well the hierarchical nature of halo formation, in the sense that more massive halos have later formation, the trend is reversed for other definitions of the formation time. In particular, the formation times that are likely to be related to the formation of galaxies in dark halos show strong trends of ``down-sizing'', in that lower-mass halos form later. We also investigate how the correlation amplitude of dark matter halos depends on the different formation times. We find that this dependence is quite strong for some definitions of formation time but weak or absent for other definitions. In particular, the correlation amplitude of halos of a given mass is almost independent of their last major merger time. For the definitions that are expected to be more related to the formation of galaxies in dark halos, a significant assembly bias is found only for halos less massive than M_*. We discuss our results in connection to the hierarchical assembly of dark matter halos, the ``archaeological down-sizing'' observed in the galaxy population, and the observed color-dependence of the clustering strength of galaxy groups and clusters.
description: 9 pages, 4 figures, submitted to MNRAS
Μουσική Σημειωτική. Επέκταση της μεθοδολογίας της αφήγησης στο μουσικό κείμενο. Μελέτη περίπτωσης της ταινίας Χάρρυ Πόττερ και ο Αιχμάλωτος του Αζκαμπάν
Creators: name: Χιλιοπούλου, Γεωργία Ανέστη
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Σημειωτική
Αφηγηματολογία
Ισοτοπία
Semiotics
Narratology
Isotopy

description: Η παρούσα εργασία πραγματεύεται την ανάλυση ενός συγκεκριμένου οπτικοακουστικού κειμένου, βασισμένη στο μοντέλο αφηγηματολογίας του Algirdas J. Greimas. Για την Αφηγηματολογία τα βασικά δομικά στοιχεία της αφήγησης, όπως η πλοκή, οι χαρακτήρες, το περιβάλλον και η οπτική γωνία του ήρωα, μπορούν να εντοπιστούν σε κάθε κείμενο από λογοτεχνία, μύθους, παραμύθια και έθιμα ως το θέατρο, τον κινηματογράφο, την ζωγραφική, την μουσική και τον χορό. Η ανάλυση επικεντρώνεται στην αφηγηματική σύνταξη και στην παραδειγματική ανάλυση του οπτικοακουστικού κειμένου που έχει επιλεχθεί. Παραπέρα, επιχειρείται η ανάλυση της δραματουργικής λειτουργίας της μουσικής με την καταγραφή και ανάλυση των μουσικών θεμάτων που χρησιμοποιούνται στο φιλμ. Ζητήματα διαπραγμάτευσης αποτελούν τα εξής: Ποια είναι τα ιδιαίτερα αφηγηματικά χαρακτηριστικά του συγκεκριμένου φιλμ; Πώς οι λειτουργίες της κινηματογραφικής μουσικής σχετίζονται με την αφήγηση; Ποιες είναι οι κεντρικές ισοτοπίες που προκύπτουν από την παραδειγματική ανάλυση; Μπορούμε να εφαρμόσουμε το συγκεκριμένο μοντέλο ανάλυσης στη μουσική του φιλμ;
description: The present paper deals with the analysis of a particular audiovisual text, based on the narrative model of Algirdas J. Greimas. The essential elements of Narratology, such as the plot, characters, environment, and hero's point of view, can be traced in any text from literature, myths, fairy tales and customs to theater, cinema, painting, music and dance. The applied analysis is focused on the semantic and syntagmatic analysis of the chosen text. Furthermore, we have attempted to analyse the dramatical function of the music through the structure of the music themes which are used in the film. Issues to be discussed are: What are the special narrative features of this film? How are the functions of cinema music related to Narratology? What are the central isotopies resulting from the semantic analysis? Can we apply this particular model of narrative analysis to film music?
1/8 BPS States in Ads/CFT
Creators: name: Gava, E.
name: Milanesi, G.
name: Narain, K. S.
name: O'Loughlin, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study a class of exact supersymmetric solutions of type IIB Supergravity. They have an SO(4) x SU(2) x U(1) isometry and preserve generically 4 of the 32 supersymmetries of the theory. Asymptotically AdS_5 x S^5 solutions in this class are dual to 1/8 BPS chiral operators which preserve the same symmetries in the N=4 SYM theory. They are parametrized by a set of four functions that satisfy certain differential equations. We analyze the solutions to these equations in a large radius asymptotic expansion: they carry charges with respect to two U(1) KK gauge fields and their mass saturates the expected BPS bound.
description: LaTeX, 41 pages. References added, some discussions corrected
Topological Susceptibility in a Uniform Magnetic Field
Creators: name: Adhikari, Prabal
Publisher: name: arXiv
Year: 2021
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 study the topological susceptibility and the fourth cumulant of the QCD vacuum in the presence of a uniform, background magnetic field in two-and-three flavor QCD finding novel, model-independent sum rules relating the shift in the topological susceptibility due to the background field to the shift in the quark condensates, and the shift in the fourth cumulant to the shifts in the quark condensates and susceptibilities
description: 7 pages, expanded introduction and discussion