cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An amended MaxEnt formulation for deriving Tsallis factors, and associated issues
Creators: name: Bercher, Jean-François
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences
subject: PACS: 05.30.-d; 05.20.-y; 05.70.Ce; 05.90.+m

description: An amended MaxEnt formulation for systems displaced from the conventional MaxEnt equilibrium is proposed. This formulation involves the minimization of the Kullback-Leibler divergence to a reference $Q$ (or maximization of Shannon $Q$-entropy), subject to a constraint that implicates a second reference distribution $P\_{1}$ and tunes the new equilibrium. In this setting, the equilibrium distribution is the generalized escort distribution associated to $P\_{1}$ and $Q$. The account of an additional constraint, an observable given by a statistical mean, leads to the maximization of Rényi/Tsallis $Q$-entropy subject to that constraint. Two natural scenarii for this observation constraint are considered, and the classical and generalized constraint of nonextensive statistics are recovered. The solutions to the maximization of Rényi $Q$-entropy subject to the two types of constraints are derived. These optimum distributions, that are Levy-like distributions, are self-referential. We then propose two `alternate' (but effectively computable) dual functions, whose maximizations enable to identify the optimum parameters. Finally, a duality between solutions and the underlying Legendre structure are presented.
description: Presented at MaxEnt2006, Paris, France, july 10-13, 2006
Spectral expansions of overconvergent modular functions
Creators: name: Loeffler, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F33

description: The main result of this paper is an instance of the conjecture made by Gouvea and Mazur (Math. Res. Lett., 1995) which asserts that for certain values of r the space of r-overconvergent p-adic modular forms of tame level N and weight k should be spanned by the finite slope Hecke eigenforms. Using methods adapted from the work of Buzzard and Calegari I show that for p=2, k = 0, N = 1, this holds for all r in (5/12, 7/12). The proof relies on a certain factorisation of the U_p operator which is known in this case but I conjecture also holds for p = 3 and 5; this conjecture also implies exact formulae for the set of slopes similar to those proved for p=2 by Buzzard and Calegari. The same methods also provide an efficient approach to explicit computations of q-expansions of small slope overconvergent eigenforms, extending the computations of Gouvea and Mazur.
description: Updated version fixing some minor typos
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Syren of Beaumaris
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: Syren was built as a schooner by Nicholsons of Annan who became famous for building Clipper ships, but she was a coaster converted later to a ketch. Syren traded initially between Annan and Wales, later being involved in carrying slate from Wales to particularly to Ireland. After the initial owners who were the Nicholson's and the vessel's master, Syren was operated by Owner/masters. Syren was in use for over fifty years in this mode with some mishaps including being trapped in Siloth when the harbour part collapsed, and having a crew member swept overboard and lost. Syren survived a collision and groundings until her anchors dragged off Pwllheli in 1905 and she grounded again. The master and the one crewman were rescued by the lifeboat, they returned and took Syren into Pwllheli the next day. There is no record of her sailing again and her listing ended that year.
Ασύρματη Διασύνδεση Arduino με Απομακρυσμένο Server
Creators: name: Χατζάκης, Μιχαήλ Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Σύνδεση Android φορητών συσκευών με Arduino μέσω Bluetooth
Σύνδεση Android φορητών συσκευών με απομακρυσμένο server μέσω Wi-Fi/3G
Android εφαρμογή για σύνδεση με συσκευή βιο-ανάδρασης
Connection between Android devices and Arduino via Bluetooth
Connection between Android devices and a distant server via Wi-Fi/3G
Android application for connection with a bio-feedback device

description: Αντικείμενο της παρούσας διπλωματικής εργασίας ήταν η δημιουργία μιας mobile εφαρμογής (app) για έξυπνα τηλέφωνα (smartphones) και ταμπλέτες (tablets) που τρέχουν το λογισμικό Android, η οποία έχει ως στόχο τη σύνδεση μέσω Bluetooth με μια συσκευή βιο-ανάδρασης, η οποία έχει δημιουργηθεί στο εργαστήριο Πολυμέσων του τμήματος Πληροφορικής της Σχολής Θετικών Επιστημών του Αριστοτελείου Πανεπιστημίου Θεσσαλονίκης. Επιπλέον, η συσκευή συνδέεται με έναν απομακρυσμένο server μέσω Wi-Fi/3G. Η εφαρμογή θα συλλέγει τις βιο-τιμές από τη συσκευή και θα τις στέλνει σε ένα πρόγραμμα στο server, το οποίο θα τις κατηγοριοποιεί, θα βγάζει το ποσοστό άγχους του χρήστη και θα το στέλνει πίσω στην εφαρμογή, ώστε να εμφανιστεί στον χρήστη. Αρχικά λοιπόν, γίνεται μια επισκόπηση της συσκευής βιο-ανάδρασης και των δυνατοτήτων της και τις λειτουργικότητες που θα προσέφερε μια mobile εφαρμογή. Έπειτα, παρουσιάζεται ένα θεωρητικό υπόβαθρο σχετικά με το θέματα των Affective Computing και Mobile Learning και τους ρόλους τους στην εκπαίδευση και γίνεται μια ανάλυση απαιτήσεων. Ακολουθεί η σχεδίαση της εφαρμογής και αμέσως μετά περιγράφεται αναλυτικά η υλοποίησή της. Τέλος, παρουσιάζονται τα συμπεράσματα της όλης αυτής εργασίας.
description: The purpose of this paper is to present the process towards the creation of a mobile application for android smartphones and tablets, which has the purpose to be used by the user in order to connect with a bio-feedback device for anxiety awareness. This device was created in the Multimedia Laboratory of the Computer Science Department of Aristotle University of Thessaloniki. The app will be connecting via Bluetooth with the bio-feedback device, receive the bio-data and connect via Wi-Fi/3G with a distant server who will be running a classification program. After the data are classified, an anxiety percentage will be produced and sent back to the app in order to be displayed for the user to see. First of all, the bio-feedback device is described, as well as the need of creating a mobile application and the merits that it would offer. After that, a theoretical background about the fields of affective computing and mobile learning are presented, emphasizing their role in education. Then, a requirements analysis is followed and after that, the planning and the implementation of the app in steps. Finally, the conclusions of the whole project are presented.
The role of HD cooling in primordial star formation
Creators: name: Ripamonti, E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The role of HD cooling in the formation of primordial objects is examined by means of a great number of 1-D models of the collapse of halos, exploring a wide range of masses and virialization redshifts. We find that HD has very little effect upon the critical mass separating the objects which are likely to form stars from those which are not. We also find that, once the proto-stellar collapse has started, HD effects are quite negligible. Instead, HD effects can be important during the intermediate stage of gas fragmentation: objects below a certain mass scale (~3x10^5 Msun at z_vir=20 in our ``fiducial'' case) can be cooled by HD down to T~50-100 K, whereas H2 cooling never takes the gas below T~200 K. The lower temperature implies a reduction of a factor ~10 in the Jeans mass of the fragmenting gas, and stars forming in such low-mass halos are probably less massive than their counterparts in larger halos. We estimate the importance of this mode of star formation through a variation of the Press-Schechter formalism, and find that it never exceeds the contribution of halos which are cooled by H2 only. Halos where HD is important account at best for a fraction ~0.25 of the total primordial star formation. However, HD cooling might provide a channel through which long-lived low mass stars could be formed in primordial conditions.
description: 11 pages, 7 figures. Accepted for publication on MNRAS
Real and complex zeros of Riemannian random waves
Creators: name: Zelditch, Steve
Publisher: name: arXiv
Year: 2008
Subjects: subject: Spectral Theory (math.SP)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider Riemannian random waves, i.e. Gaussian random linear combination of eigenfunctions of the Laplacian on a compact Riemannian manifold with frequencies from a short interval (`asymptotically fixed frequency'). We first show that the expected limit distribution of the real zero set of a is uniform with respect to the volume form of a compact Riemannian manifold $(M, g)$. We then show that the complex zero set of the analytic continuations of such Riemannian random waves to a Grauert tube in the complexification of $M$ tends to a limit current.
description: For the Proceedings of the Conference, "Spectral Analysis in Geometry and Number Theory on the occasion of Toshikazu Sunada's 60th birthday", to appear in the Contemp. Math. Series
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Tamerlane
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The Tamerlane was built in St Martin, New Brunswick in 1824, sailing from St John's NB to Liverpool and stranding on the first two voyage carrying timber. The Tamerlane afterwards sailed to India several times from Greenock and Liverpool, before sailing to the Southern USA returning with cotton. Tamerlane changed owners several times and masters regularly, even having one washed board after leaving Quebec. It regularly carried emigrants to Canada from Britain, returning with timber. The Tamerlane stranded in 1846 near Aberystwyth in a severe gale and was sold for salvage.
Effect of the surface shape of a large space body on its fragmentation in a planetary atmosphere
Creators: name: Khrennikov, Daniil E.
name: Titov, Andrei K.
name: Ershov, Alexander E.
name: Klyuchantsev, Andrei B.
name: Pariev, Vladimir I.
name: Karpov, Sergei V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Employing the finite element and computational fluid dynamics methods, we have determined the conditions for the fragmentation of space bodies or preservation of their integrity when they penetrate into the Earth's atmosphere. The origin of forces contributing to the fragmentation of space iron bodies during the passage through the dense layers of the planetary atmosphere has been studied. It was shown that the irregular shape of the surface can produce transverse aerodynamic forces capable of causing deformation stress in the body exceeding the tensile strength threshold of iron.
description: 9 pages, 14 figures
Correlation between 3:2 QPO pairs and Jets in Black Hole X-ray Binaries
Creators: name: Wang, Ding-Xiong
name: Ye, Yong-Chun
name: Huang, Chang-Yin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We argue, following our earlier works (the "CEBZMC model"), that the phenomenon of twin peak high frequency quasi-periodic oscillations (QPOs) observed in black hole X-ray binaries is caused by magnetic coupling (MC) between accretion disk and black hole (BH). Due to MC, two bright spots occur at two separate radial locations r_{in} and r_{out} at the disk surface, energized by a kind of the Blandford-Znajek mechanism (BZ). We assume, following the Kluzniak-Abramowicz QPO resonance model, that Keplerian frequencies at these two locations are in the 3:2 ratio. With this assumption, we estimate the BH spins in several sources, including GRO J1655-40, GRS 1915+105, XTE J1550-564, H1743-322 and Sgr A*. We give an interpretation of the "jet line" in the hardness-intensity plane discussing the parameter space consisting of the BH spin and the power-law index for the variation of the large-scale magnetic field in the disk. Furthermore, we propose a new scenario for the spectral state transitions in BH X-ray binaries based on fluctuation in densities of accreting plasma from a companion star.
description: 17 pages, 6 figures, accepted by APJ
Two modes of searching for new neutrino interactions at MINOS
Creators: name: Friedland, Alexander
name: Lunardini, Cecilia
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The SuperKamiokande atmospheric neutrino measurements leave substantial room for nonstandard interactions (NSI) of neutrinos with matter in the nu_e- nu_tau sector. Large values of the NSI couplings are accommodated if the vacuum oscillation parameters are changed from their standard values. Short and medium baseline neutrino beams can break this degeneracy by measuring the true vacuum oscillation parameters with the muon neutrino disappearance mode, for which the matter effects are negligible or subdominant. These experiments can also search for the nu_e-nu_tau flavor changing effects directly, by looking for nu_mu->nu_e conversion caused by the intervening matter. We discuss both of these methods for the case of MINOS. We find that, while the present MINOS data on nu_mu disappearance induce only minor changes on the constraints on the NSI parameters, the situation will improve markedly with the planned increase of the statistics by an order of magnitude. In that case, the precision will be enough to distinguish certain presently allowed NSI scenarios from the no-NSI case. NSI per quark of about 10% the size of the standard weak interaction could give a nu_mu - nu_e conversion probability of the order ~ 10^{-2}, measurable by MINOS in the same high statistics scenario. In this nu_mu - nu_e channel, the small effects of NSI could be comparable or larger than the vacuum contribution of the small angle theta_{13}. The expected theta_{13} bound at MINOS should be more properly interpreted as a bound in the theta_{13}-NSI parameter space.
description: 10 pages, 3 figures; noticed typos corrected, results unchanged
Collective quantization of axially symmetric gravitating B=2 skyrmion
Creators: name: Sato, Hisayuki
name: Sawado, Nobuyuki
name: Shiiki, Noriko
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we perform collective quantization of an axially symmetric skyrmion with baryon number two.The rotational and isorotational modes are quantized to obtain the static properties of a deuteron and other dibaryonic objects such as masses, charge densities, magnetic moments. We discuss how the gravity affects to those observables.
description: 13 pages, 13 figures, 1 table, accepted to Physical Review D
Temperonic Crystal: a superlattice for temperature waves in graphene
Creators: name: Gandolfi, Marco
name: Giannetti, Claudio
name: Banfi, Francesco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The temperonic crystal, a periodic structure with a unit cell made of two slabs sustaining temperature wave-like oscillations on short time-scales, is introduced. The complex-valued dispersion relation for the temperature scalar field is investigated for the case of a localised temperature pulse. The dispersion discloses frequency gaps, tunable upon varying the slabs thermal properties. Results are shown for the paradigmatic case of a graphene-based temperonic crystal. The temperonic crystal extends the concept of superlattices to the realm of temperature waves, allowing for coherent control of ultrafast temperature pulses in the hydrodynamic regime at above liquid nitrogen temperatures.
description: 5 pages, 3 figures
Critical speeding-up in a local dynamics for the random-cluster model
Creators: name: Deng, Youjin
name: Garoni, Timothy M.
name: Sokal, Alan D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the dynamic critical behavior of the local bond-update (Sweeny) dynamics for the Fortuin-Kasteleyn random-cluster model in dimensions d=2,3, by Monte Carlo simulation. We show that, for a suitable range of q values, the global observable S_2 exhibits "critical speeding-up": it decorrelates well on time scales much less than one sweep, so that the integrated autocorrelation time tends to zero as the critical point is approached. We also show that the dynamic critical exponent z_{exp} is very close (possibly equal) to the rigorous lower bound α/ν, and quite possibly smaller than the corresponding exponent for the Chayes-Machta-Swendsen-Wang cluster dynamics.
description: LaTex2e/revtex4, 4 pages, includes 5 figures
The GALAH survey: Solar twins and their multiplicity
Creators: name: Čotar, Klemen
Publisher: name: Zenodo
Year: 2018
Subjects: solar-like stars
solar twins
binaries
distance metric
similarity

description: We used a set of more than 500.000 high-resolution spectra acquired in the scope of the GALAH survey to search for stars whose acquired spectrum resembles the Solar spectrum. Direct spectral comparison between observed and Solar spectrum was performed for every observed object. During this comparison, the Gaussian process analysis was performed to model spectral noise in the observed spectrum and reduce its influence on the used spectral similarity metrics. Spectroscopic results, combined with the Gaia DR2 distance and magnitudes, show that some of the best matching candidates exhibit excess luminosity. To determine the number of stellar components in those systems, we modelled observed spectroscopic and photometric signatures using data-driven models that were trained on a set of real-life, model-free observations.
Supplementary data from: Green synthesis, characterization, antileishmanial activity, and in silico investigations of Hydrazone Schiff Bases
Creators: name: Ur Rashid, Haroon
name: Khan, Sadia
name: Khan, Sher Wali
name: Nayab, Saira
name: Umar, Muhammad Naveed
name: Ali, Hafiz Tauqeer
name: Khan, Momin
name: Shah, Syed Wadood Ali
Publisher: name: Zenodo
Year: 2024
Subjects: Schiff base
Green chemistry
antileishmanial activity
Molecular docking
ADMET
DFT
Cytotoxicity

description: Hydrazone Schiff bases have significant biological and chemotherapeutic potential. This study explores their synthesis using environmentally friendly methods. The process involves combining substituted aldehydes, ketones, and amines with a small amount of glacial acetic acid in a mortar, achieving high yields of the desired compounds. Seven new hydrazone Schiff bases were successfully synthesized and identified through physical properties and spectroscopic techniques (FT-IR, 1H NMR, and 13C NMR). The compounds were tested for their antileishmanial activity against Leishmania tropica promastigotes. While all but one compound showed activity, SSB28 exhibited the highest potency with an IC50 value of 4 ± 0.5 µg/mL, outperforming the reference drug Amphotericin-B. In-silico studies, including molecular docking and ADMET assays, confirmed the promising antileishmanial potential of SSB28.
Ανάπτυξη μεθόδου υγρής χρωματογραφίας υψηλής πίεσης (HPLC) για τον ταυτόχρονο προσδιορισμό μελαμίνης και κυρομαζίνης μετά από εκχύλιση στερεάς φάσης σε διασπορά με προσροφητικά υλικά QuEChERS και εφαρ
Creators: name: Χριστογιώργος, Χρήστος Ιωάννης
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Μελαμίνη
Κυρομαζίνη
QuEChERS
Melamine Cyromazine

description: Σκοπός της παρούσας εργασίας ήταν η ανάπτυξη και η επικύρωση μιας μεθόδου Υγρής Χρωματογραφίας Υψηλής Πίεσης (HPLC) για τον προσδιορισμό και την ποσοτικοποίηση Κυρομαζίνης σε ζωοτροφές εμπορίου. Η μέθοδος αναπτύχθηκε για τον προσδιορισμό κυρομαζίνης σε ζωοτροφές εμπορίου. Τα δείγματα εκχυλίστηκαν με την τεχνική της εκχύλισης διασποράς στερεάς φάσης με προσροφητικά υλικά QuEChERS. Η στήλη η οποία χρησιμοποιήθηκε ήταν η Inertsil ODS -3 (5 μm, 250 × 4 mm) και το εκλουστικό αποτελούταν από MeOH – H2O σε αναλογία 60-40 % v/v με ισοκρατική έκλουση. Η ανίχνευση έγινε με ανιχνευτή παράταξης φωτοδιόδων σε μήκος κύματος 220 nm. Κατά την επικύρωση της μεθόδου εξετάστηκε η γραμμικότητα, η ευαισθησία, η εκλεκτικότητα, η ακρίβεια, η επαναληψιμότητα και η σταθερότητα. Ο χρόνος έκλουσης για την κυρομαζίνη ήταν στα 3,410 min. Το LOD της μεθόδου βρέθηκε στα 0,03 mg/Kg, καθώς η γραμμικότητα επεκτείνεται μέχρι τα 10 mg/Kg και το LOQ υπολογίστηκε στα 0,1 mg/Kg και οι ανακτήσεις κυμάνθηκαν περίπου στο 70%. Η σταθερότητα της κυρομαζίνης στα διαλύματα ήταν της τάξης του 98%. Εξετάστηκαν διάφορα δείγματα από την τοπική αγορά και δεν εντοπίστηκαν καθόλου υπολείμματα κυρομαζίνης.
description: The aim of this study was to develop and validate an HPLC method for the determination and quantification of cyromazine in commercial animal feed . Samples were extracted by the technique of dispersing solid phase extraction adsorbents QuEChERS. The column used was a Inertsil ODS -3 (5 micron, 250 × 4 mm) and the eluent consisted of MeOH – H2O in a ratio of 60-40% v/v with isocratic elution. The detection was made with a photodiode array detector at 220 nm. Upon validation of the method, linearity, sensitivity, specificity, accuracy, repeatability and stability were tested . The elution time for cyromazine was at 3,410 min. The LOD of the method was found in the 0.03 mg / Kg, as the linearity extends up to 10 mg / Kg and LOQ was estimated at 0.1 mg / Kg and recoveries ranged around 70%. The stability of the cyromazine in the solutions reached the 98%. Several samples were examined from the local market however no cyromazine vesidues were identified.
Anomaly-Induced Inflaton Decay and Gravitino-Overproduction Problem
Creators: name: Endo, Motoi
name: Takahashi, Fuminobu
name: Yanagida, T. T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We point out that the inflaton spontaneously decays into any gauge bosons and gauginos via the super-Weyl, Kahler and sigma-model anomalies in supergravity, once the inflaton acquires a non-vanishing vacuum expectation value. In particular, in the dynamical supersymmetry breaking scenarios, the inflaton necessarily decays into the supersymmetry breaking sector, if the inflaton mass is larger than the dynamical scale. This generically causes the overproduction of the gravitinos, which severely constrains the inflation models.
description: 5 pages, 1 figure; v3: arguments clarified
Stronger bounds on the cost of computing Groebner bases for HFE systems
Creators: name: Gorla, Elisa
name: Mueller, Daniela
name: Petit, Christophe
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Commutative Algebra (math.AC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We give upper bounds for the solving degree and the last fall degree of the polynomial system associated to the HFE (Hidden Field Equations) cryptosystem. Our bounds improve the known bounds for this type of systems. We also present new results on the connection between the solving degree and the last fall degree and prove that, in some cases, the solving degree is independent of coordinate changes.
description: 15 pages
Οι εσχατολογικοί μύθοι στο πλατωνικό έργο
Creators: name: Αμανατίδη, Σημέλα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Πλάτωνας
Μύθοι
Ψυχή
Plato
Myths
Soul

description: Η εργασία, με εναρκτήριο ερωτηματικό αναφορικά με το ρόλο και την ιδιαίτερη λειτουργία του «μύθου» στους πλατωνικούς διαλόγους, προχωρά σ’ενα πιο διευρυμένο προβληματισμό και κατόπιν επιχειρεί μια πορεία αναζήτησης και έρευνας, με φυγόκεντρα και συγχρόνως κεντρομόλα χαρακτηριστικά, που από τη μία εξειδικεύουν και από την άλλη επεκτείνουν την αφετηριακή διερώτηση. Τέλος, καταλήγει σε έναν δρόμο προσέγγισης του πλατωνικού μύθου μέσω μίας θεματικής, αυτήν της εσχατολογίας. Έτσι, η ανάγκη προσδιορισμού του επέκεινα αλλά και το προσωπικό ενδιαφέρον του γράφοντος διαγράφουν μία ερευνητική διαδρομή στους εσχατολογικούς μύθους του Πλάτωνα μέσα από μία πολυπρισματική προσέγγιση που αγγίζει τόσο την αφήγηση ως πράξη, όσο και το περιεχόμενο των μύθων.
description: The present thesis starting from the question concerning the role and the function of the “myth” in Plato’s dialogues, deepens the speculation and afterwards attempts a search and research process, with centrifugal and centripetal characteristics. On the one hand, we amplify the baseline questioning and, on the other hand, we extend it. The way to reach Plato’s myths comes only through eschatology and this quest among different approaches and angles of these myths determines the research of the thesis.
On the Virasoro Structure of Symmetry Algebras of Nonlinear Partial Differential Equations
Creators: name: Gungor, Faruk
Publisher: name: arXiv
Year: 2006
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We discuss Lie algebras of the Lie symmetry groups of two generically non-integrable equations in one temporal and two space dimensions arising in different contexts. The first is a generalization of the KP equation and contains 9 arbitrary functions of one and two arguments. The second one is a system of PDEs that depend on some physical parameters. We require that these PDEs are invariant under a Kac-Moody-Virasoro algebra. This leads to several limitations on the coefficients (either functions or parameters) under which equations are prime candidates for being integrable.
description: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
INGLIZ TILIDAN DARIY TILIGA KIRGAN  HARBIY O'ZLASHMA TERMINLAR
Creators: name: Sherali Ishankulovich Ertayev, O'zbekiston Respublikasi Qurolli Kuchlari Akademiyasi Tillar kafedrasi dotsenti
Publisher: name: Zenodo
Year: 2024

description: Mazkur maqolada ingiliz tilidan dariy tiliga o‘zlashgan harbiy terminlari tavsifi ilmiy jihatdan yoritilgan. Shuningdek, maqolada dariy tiliga o‘zlashgan harbiy terminlarning mazmun-mohiyati ochib beriladi. 

Kalit so‘zlar. Dariy tili, leksika, harbiy soha, o‘zlashma termin, qo‘shin turlari, artilleriya, aloqa, radielektron kurash.
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the SS Thelma
Creators: name: Davies, Gareth J.S.
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The SS Thelma was a small coastal cargo steamship built in Troon, Scotland and commissioned in 1903. The SS Thelma sailed largely in the Irish Sea carrying coal, cement and stones between NW England, Wales and SW England. In August 1934, in poor visibility the SS Thelma collided with another coastal steamship the SS Pulteney off Bardsey Island, Caernarvonshire resulting in the SS Pulteney sinking with no loss of life. In Aug 1943, the SS Thelma ran aground at the west end of Doolough Point, Blacksod Bay, Ireland. She was refloated but later sank.
Supervised Laplacian Eigenmaps for Hyperspectral Data
Creators: name: Becker, Florian
Publisher: name: Karlsruhe
Year: 2019

description: With Laplacian eigenmaps the low-dimensional manifold of high-dimensional data points can be uncovered. This nonlinear dimensionality reduction technique is popular due to its well-understood theoretical foundation. This paper outlines a straightforward way to incorporate class label information into the standard (unsupervised) Laplacian eigenmaps formulation. With the example of hyperspectral data samples this supervised reformulation is shown to reinforce within-class clustering and increase between-class distances.
Observation of photonic antichiral edge states
Creators: name: Zhou, Peiheng
name: Liu, Gui-Geng
name: Yang, Yihao
name: Hu, Yuan-Hang
name: Ma, Sulin
name: Xue, Haoran
name: Wang, Qiang
name: Deng, Longjiang
name: Zhang, Baile
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Chiral edge states are a hallmark feature of two-dimensional topological materials. Such states must propagate along the edges of the bulk either clockwise or counterclockwise, and thus produce oppositely propagating edge states along the two parallel edges of a strip sample. However, recent theories have predicted a counterintuitive picture, where the two edge states at the two parallel strip edges can propagate in the same direction; these anomalous topological edge states are named as antichiral edge states. Here we report the experimental observation of antichiral edge states in a gyromagnetic photonic crystal. The crystal consists of gyromagnetic cylinders in a honeycomb lattice, with the two triangular sublattices magnetically biased in opposite directions. With microwave measurement, unique properties of antichiral edge states have been observed directly, which include the titled dispersion, the chiral-like robust propagation in samples with certain shapes, and the scattering into backward bulk states at certain terminations. These results extend and supplement the current understanding of chiral edge states.
Discrete excursions
Creators: name: Bousquet-Mélou, Mireille
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A15

description: It is well-known that the length generating function E(t) of Dyck paths (excursions with steps +1 and -1) satisfies 1-E+t^2E^2=0. The generating function E^(k)(t) of Dyck paths of height at most k is E^(k)=F_k/F_{k+1}, where the F_k are polynomials in t given by F_0=F_1=1 and F_{k+1}= F_k-t^2F_{k-1}. This means that the generating function of these polynomials is \sum_{k\ge 0} F_k z^k= 1/(1-z+t^2z^2). We note that the denominator of this fraction is the minimal polynomial of the algebraic series E(t). This pattern persists for walks with more general steps. For any finite set of steps S, the generating function E^(k)(t) of excursions (generalized Dyck paths) taking their steps in S and of height at most k is the ratio F_k/F_{k+1} of two polynomials. These polynomials satisfy a linear recurrence relation with coefficients in Q[t]. Their (rational) generating function can be written \sum_{k\ge 0} F_k z^k= N(t,z)/D(t,z). The excursion generating function E(t) is algebraic and satisfies D(t,E(t))=0 (while N(t,E(t))\not = 0). If max S=a and min S=b, the polynomials D(t,z) and N(t,z) can be taken to be respectively of degree d_{a,b}=binomial(a+b,a) and d_{a,b}-a-b in z. These degrees are in general optimal: for instance, when S={a,-b} with a and b coprime, D(t,z) is irreducible, and is thus the minimal polynomial of the excursion generating function E(t). The proofs of these results involve a slightly unusual mixture of combinatorial and algebraic tools, among which the kernel method (which solves certain functional equations), symmetric functions, and a pinch of Galois theory.
Αξιολόγηση των μετρήσεων του συστήματος διαφορικής απορρόφησης
Creators: name: Ρίζος, Κωνσταντίνος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Ατμοσφαιρική ρύπανση
Αξιολόγηση μετρήσεων
Σύστημα διαφορικής απορρόφησης
Air Pollution
Evaluation of measurements
Differential absorption system

description: To SANOA είναι ένα καινοτόμο σύστημα παρακολούθησης της ποιότητας του ατμοσφαιρικού αέρα η χρήση του οποίου μας βοηθάει να μετρήσουμε τοπικά και ταυτόχρονα έναν σημαντικό αριθμό χημικών ενώσεων όπως το διοξείδιο του αζώτου, το διοξείδιο του θείου, το όζον, πτητικές οργανικές ενώσεις συμπεριλαμβανομένων και των ενώσεων βενζόλιο, τολουόλιο, ξυλόλιο και ενδεχόμενα κάποιες άλλες χημικες ενώσεις που λειτουργούν ως απορροφητές. Η μέτρηση γίνεται με φασματοσκοπία διαφορικής οπτικής απορρόφησης.Ολόκληρος ο εξοπλισμός ο οποίος αποτελείται από τέσσερα ξεχωριστά τμήματα (εκπομπός, δέκτης, μονάδα ελέγχου, μονάδα διασύνδεσης) είναι εγκατεστημένος στο χώρο του Αριστοτελείου Πανεπιστημίου Θεσσαλονίκης. Τα δεδομένα του οργάνου καλύπτουν τη χρονική περίοδο από τον Ιανουάριο του 2013 μέχρι το τέλος του 2014.Στην εργασία αυτή γίνεται μελέτη της εποχικής και ημερήσιας διακύμανσης των ρύπων κατά τη διάρκεια των δύο αυτών ετών.Τέλος, με σκοπό την αξιολόγηση των μετρήσεων του οργάνου γίνεται μία σύγκριση των μετρήσεών του με τις αντίστοιχες ενός αναλυτή ο οποίος είναι εγκατεστημένος και αυτός στο χώρο του Πανεπιστημίου.Τα αποτελέσματα των μετρήσεων και της σύγκρισης δίνονται και σχολιάζονται στα τρία τελευταία κεφάλαια αυτής της εργασίας.
description: SANOA is an innovative system for local and simultaneous measurements of minor atmospheric compounds such as nitrogen dioxide, sulfur dioxide, ozone, COV -BTX included-, and potentially other absorbing compounds, based on the DOAS method. The whole equipment, which is composed of four separate units (projector, receiver, control unit, interface unit) is located in the Aristotle University of Thessaloniki. The data, come from SANOA, cover the time period from January of 2013 to the end of 2014. The seasonal and daily variation of all the above mentioned air pollutants are presented in this work, throughout the reference period. Finally, in order to evaluate our results, we have done a comparison between the measuremets of SANOA and these of an analyzer which is also located in our university. All the results from our measurements and from the comparison are given and discussed in the last three chapters of this assignment.
Tentatives de biographies scéniques : entre mythe, histoire et fiction
Creators: name: Thulard, Adeline
Publisher: name: Itinera
Year: 2019

description: This paper aims to report the conclusions of a practice-as-research laboratory carried out with students of Université Lumière Lyon 2, which took place within the project “Borders’ trespassing: from France to Italy, from research to creation, from an art to another”. Students were invited to write a dramaturgy inspired from Casanova’s life. They explored several questions about playwriting (action, character, dialog…) and found original solutions to write a biographic play. The results question the representation of identity and personality in our mediatic world, experimenting intermediality in their text. Keymords: théâtre, Giacomo Casanova, laboratoire, recherche-création, intermédialité.
description: Itinera, N. 17 (2019): Réécriture scénique et sources: du roman français à la scène théâtrale italienne
A search for meaning: secondary ESL students and reader response
Creators: name: Johansen, Pauline A. G.
Publisher: name: University of British Columbia
Year: 2009

description: This study, A Search for Meaning: Secondary ESL Students and Reader Response, involved a year long examination of two secondary ESL classrooms which had as their foundation a literature-based, response-centered curriculum. The research was concerned with what we can learn when we examine the use of a reader response approach within a secondary ESL classroom. In order to investigate this question a case study methodology was used. The study involved two groups of Asian secondary ESL students who were enrolled in pull-out ESL classes in a suburban, senior secondary school. These students were designated through district wide testing as being Level Three ( beginning/ intermediate) and Level Four (intermediate to advanced). As part of the year-long curriculum both groups of students were involved in a variety of activities which supported personal meaning. The same belief system influenced the curriculum for both groups of students; however, a variety of factors influenced the degree of involvement and personal meaning making that the two groups of students exhibited. Both classes achieved gains in terms of the complexity and commitment to personal response and meaning-making. However, the Level Three students made greater gains in their written responses. Both groups were still at the emergent stages of making meaningful oral responses to poetry or prose. In conclusion, this research indicates that secondary ESL students can benefit from a literature-based, response-centered program in terms of their written responses, given that key elements are in place. Some of these elements are: a sense of community, the use of instructional frameworks such as Readers' and Writers' workshops, implementation of dialogue and response journals, thematic units, and the on-going use of literature in the classroom.
Comment la scène italienne s’est appropriée L’Homme semence : stratégies d’adaptation d’un prétendu manuscrit
Creators: name: Brignoli, Laura
Publisher: name: Itinera
Year: 2019

description: Sonia Bergamasco’s adaptation of L’Homme semence by Violette Ailhaud makes use of a single actor reciting, even if, in a staging that emphasizes plurimediality, it is not possible to define L'uomo seme as a real monologue. The analysis will take into account first the structure of the story, the strains that the plot imposes on the fabula and the effects it has on its global meaning; the linguistic marks that oppose the choral speech to the individual discourse, and the mentions referring to a culture anchored in a territory in a precise moment of history, which are superimposed on a speech that touches on the universal. Adaptation, réécriture, Ailhaud, Homme semence, théâtre
description: Itinera, N. 17 (2019): Réécriture scénique et sources: du roman français à la scène théâtrale italienne
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Thetis
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The Thetis was a brig owned by Francis Spaight J.P. of Limerick, built in Sunderland in 1838. The Thetis of Limerick was engaged in importing timber and timber products from Quebec to Limerick and often carried emigrants on the outward voyage to Quebec, including tenants and squatters cleared from Francis Spaights estates during the famine in Ireland. The Thetis was wrecked on the Cardigan Bar in a severe storm in 1850 with the loss of eleven lives despite the heroic efforts of the crews of the new lifeboat.
Tra Lettura e Teatro: Il caso di Libri da Ardere di Amélie Nothomb
Creators: name: Cambiaghi, Mariagabriella
Publisher: name: Itinera
Year: 2019

description: Les combustibles (translated into Italian as Libri da ardere) is the third Amélie Nothomb work and her unique theatrical text. However, it can’t be considered as a canonical play, for its strong relationship with the page and the reader. The paper focuses on two theatrical versions produced by Teatro dell’Elfo in Milan in 2006 and 2018, adapted and directed by Cristina Crippa. The show maintains the link with the book through the declamation of stage directions by the three characters, in an experiment between reading and theatre. Combustibles, Nothomb, Cristina Crippa, Teatro dell’Elfo.
description: Itinera, N. 17 (2019): Réécriture scénique et sources: du roman français à la scène théâtrale italienne
Distribution of the magnetization reversal duration in sub-ns spin-transfer switching
Creators: name: Devolder, T.
name: Chappert, C.
name: Katine, J. A.
name: Carey, M. J.
name: Ito, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the distribution of switching times in spin-transfer switching induced by sub-ns current pulses in pillar-shaped spin-valves. The pulse durations leading to switching follow a comb-like distribution, multiply-peaked at a few most probable, regularly spaced switching durations. These durations reflect the precessional nature of the switching, which occurs through a fluctuating integer number of precession cycles. This can be modeled considering the thermal variance of the initial magnetization orientations and the occurrence of vanishing total torque in the possible magnetization trajectories. Biasing the spin-valve with a hard axis field prevents some of these occurrences, and can provide an almost perfect reproducibility of the switching duration.
description: submitted to PRB
Predictive validity of TOEFL scores on first term’s GPA as the criterion for international exchange students
Creators: name: Yan, Zheng
Publisher: name: University of British Columbia
Year: 2009

description: The Test of English as a Foreign Language (TOEFL) has been used in making admission decisions for over 30 years; however, the predictive validity of the test has been uncertain. The present study was intended to investigate the predictive validity of TOEFL scores on first term's grade point average (GPA). Participants were 97 second-year university students, 46 male and 52 female, in an international academic exchange program. Most majored in Humanities and Social Sciences. The predictor variables in the study included TOEFL total scores, TOEFL section I scores, TOEFL section II scores, TOEFL section III scores, oral proficiency interview scores, writing sample scores, and gender. First term's GPA was the criterion variable. The data were analyzed by multiple regression analysis with a hierarchical procedure. The results were interpreted on the basis of Cohen's (1988) conventional definitions on the effect size of R². The main findings of the study indicate that: (a) TOEFL total scores have a medium level of predictive validity on GPA (ΔR²=.142, ϱ<.001); (b) TOEFL section I scores have a medium level of predictive validity (ΔR²=.044, ϱ<.05); (c) TOEFL section II scores have a medium level of predictive validity (ΔR²=.112, ϱ<.001); (d) TOEFL section III scores have a negligible level of predictive validity (ΔR² =.005, ϱ>.05); (e) Oral proficiency interviews scores have a negligible level of predictive validity (ΔR² =.010, ϱ>.05); (f) Writing samples scores have a small level of predictive validity (ΔR² =.047, ϱ<.05); And (g) gender has a medium level of predictive validity (ΔR² =.130, ϱ<.001). The findings of the study thus validate the use of TOEFL scores as one of the requirements for admission in the international exchange program and provide new empirical evidence for investigation of the relationship between language proficiency and academic achievement.
Γλωσσικές πολιτικές οικογενειών αλβανικής καταγωγής στην Ελλάδα
Creators: name: Ζησιμοπούλου, Βασιλική Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Γλωσσική πολιτική
Οικογένειες αλβανικής καταγωγής
Διγλωσσία
Language policy
Families of Albanian background
Bilingualism

description: Η παρούσα εργασία διερευνά τις γλωσσικές πολιτικές οικογενειών αλβανικής καταγωγής στην Ελλάδα. Στο πρώτο μέρος της εργασίας γίνεται αναφορά στο φαινόμενο της διγλωσσίας καθώς και της γλωσσικής διατήρησης και γλωσσικής μετατόπισης. Στη συνέχεια προσεγγίζεται η έννοια της γλωσσικής πολιτικής, με ειδική αναφορά στην οικογενειακή γλωσσική πολιτική, ενώ παρουσιάζονται πληροφορίες για τη γλωσσική εκπαιδευτική πολιτική και την παρουσία των Αλβανών μεταναστών στην Ελλάδα. Το δεύτερο μέρος της εργασίας αποτελεί το ερευνητικό, στο οποίο παρουσιάζεται η μεθοδολογία που ακολουθήθηκε κατά τη διεξαγωγή συνεντεύξεων με γονείς αλβανικής καταγωγής. Από την ανάλυση των αποτελεσμάτων προκύπτουν πληροφορίες για τις γλωσσικές πρακτικές και αντιλήψεις των γονέων γύρω από τη διγλωσσία, την οποία αναπτύσσουν τα παιδιά τους, καθώς και πληροφορίες για τις συγκρούσεις που δέχονται οι γονείς από το ευρύτερο κοινωνικό σύνολο.
description: Τhe present thesis explores language policies of Albanian background families in Greece. In the first part of the thesis we refer to bilingualism and the phenomenon of language maintenance and language shift. Subsequently we approach the concept of language policy, with special reference to family language policy and we provide information about education language policy and the presence of Albanian immigrants in Greece. The second part which concludes the research, presents the methodology followed in conducting interviews with parents of Albanian origin. Through the analysis of the results, we obtain information about parents’ language practices and perceptions around the bilingualism developed by their children, as well as information about the conflicts that parents receive from the wider community.
description: Συνεργαζόμενα Τμήματα Πανεπιστήμιο Λε Μαν (Maine France, Γαλλία)
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Timbo
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: Research on the Timbo, a steamship built of iron in 1883 with a gross weight of 295 tons, that sank Tremadog bay east of St Tudwal's island in 1922.
Approximate initial data for binary black holes
Creators: name: Dennison, Kenneth A.
name: Baumgarte, Thomas W.
name: Pfeiffer, Harald P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct approximate analytical solutions to the constraint equations of general relativity for binary black holes of arbitrary mass ratio in quasicircular orbit. We adopt the puncture method to solve the constraint equations in the transverse-traceless decomposition and consider perturbations of Schwarzschild black holes caused by boosts and the presence of a binary companion. A superposition of these two perturbations then yields approximate, but fully analytic binary black hole initial data that are accurate to first order in the inverse of the binary separation and the square of the black holes' momenta.
description: 13 pages, 4 figures, added comparison to numerical calculations, accepted to PRD
Quantum jumps of saturation level rigidity and anomalous oscillations of level number variance in the semiclassical spectrum of a modified Kepler problem
Creators: name: Wickramasinghe, J. M. A. S. P.
name: Goodman, B.
name: Serota, R. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We discover quantum Hall like jumps in the saturation spectral rigidity in the semiclassical spectrum of a modified Kepler problem as a function of the interval center. These jumps correspond to integer decreases of the radial winding numbers in classical periodic motion. We also discover and explain single harmonic dominated oscillations of the level number variance with the width of the energy interval. The level number variance becomes effectively zero for the interval widths defined by the frequency of the shortest periodic orbit. This signifies that there are virtually no variations from sample to sample in the number of levels on such intervals.
description: 18 pages, 3 color figures inline