cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Energy Balanced Two-level Clustering for Large-Scale Wireless Sensor Networks based on the Gravitational Search Algorithm
Creators: name: Mamalis, Basilis
name: Perlitis, Marios
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Organizing sensor nodes in clusters is an effective method for energy preservation in a Wireless Sensor Network (WSN). Throughout this research work we present a novel hybrid clustering scheme, that combines a typical gradient clustering protocol with an evolutionary optimization method that is mainly based on the Gravitational Search Algorithm (GSA). The proposed scheme aims at improved performance over large in size networks, where classical schemes in most cases lead to non-efficient solutions. It first creates suitably balanced multihop clusters, in which the sensors energy gets larger as coming closer to the cluster head (CH). In the next phase of the proposed scheme a suitable protocol based on the GSA runs to associate sets of cluster heads to specific gateway nodes for the eventual relaying of data to the base station (BS). The fitness function was appropriately chosen considering both the distance from the cluster heads to the gateway nodes and the remaining energy of the gateway nodes, and it was further optimized in order to gain more accurate results for large instances. Extended experimental measurements demonstrate the efficiency and scalability of the presented approach over very large WSNs, as well as its superiority over other known clustering approaches presented in the literature.
description: 11 pages
On Darmon's program for the generalized Fermat equation, I
Creators: name: Billerey, Nicolas
name: Chen, Imin
name: Dieulefait, Luis
name: Freitas, Nuno
Publisher: name: arXiv
Year: 2022
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11D41

description: In 2000, Darmon described a program to study the generalized Fermat equation using modularity of abelian varieties of $\mathrm{GL}_2$-type over totally real fields. The original approach was based on hard open conjectures, which have made it difficult to apply in practice. In this paper, building on the progress surrounding the modular method from the last two decades, we analyze and expand the current limits of this program by developing all the necessary ingredients to use Frey abelian varieties for new Diophantine applications. In particular, we deal with all but the fifth and last step in the modular method for Fermat equations of signature $(r,r,p)$ in almost full generality.
 As an application, for all integers $n \geq 2$, we give a resolution of the generalized Fermat equation $x^{11} + y^{11} = z^n$ for solutions $(a,b,c)$ such that $a + b$ satisfies certain $2$- or $11$-adic conditions.
 Moreover, the tools developed can be viewed as an advance in addressing a difficulty not treated in Darmon's original program: even assuming `big image' conjectures about residual Galois representations, one still needs to find a method to eliminate Hilbert newforms at the Serre level which do not have complex multiplication. In fact, we are able to reduce the problem of solving $x^5 + y^5 = z^p$ to Darmon's `big image conjecture', thus completing a line of ideas suggested in his original program, and notably only needing the Cartan case of his conjecture.
description: This paper is the first part of a series of works about Darmon's program. This manuscript is not intended for publication. A shorter version of this work has been published in Crelle. The citations to 'On Darmon's program for the generalized Fermat equation, I' in the second part of this series (arXiv:2308.07062) follow the numbering of this document and not of the shorter published version
Scale-free network growth by ranking
Creators: name: Fortunato, Santo
name: Flammini, Alessandro
name: Menczer, Filippo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Network growth is currently explained through mechanisms that rely on node prestige measures, such as degree or fitness. In many real networks those who create and connect nodes do not know the prestige values of existing nodes, but only their ranking by prestige. We propose a criterion of network growth that explicitly relies on the ranking of the nodes according to any prestige measure, be it topological or not. The resulting network has a scale-free degree distribution when the probability to link a target node is any power law function of its rank, even when one has only partial information of node ranks. Our criterion may explain the frequency and robustness of scale-free degree distributions in real networks, as illustrated by the special case of the Web graph.
description: 4 pages, 2 figures. We extended the model to account for ranking by arbitrarily distributed fitness. Final version to appear on Physical Review Letters
Additional file 2 of Translation and cultural adaptation of a romanian version of the communication assessment tool (CAT_Ro)
Creators: name: Balanescu, Andra Rodica
name: Bojinca, Violeta Claudia
name: Ana-Maria Schweitzer
name: Joca, Bogdan
name: Mardale, Denise Ani
name: Badea, Denisa
name: Bojinca, Mihai
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 2.
Brouwer's Fan Theorem:
Creators: name: Πετράκης, Ιωσήφ Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: subject: Μαθηματικά
subject: Ιντουϊσιονισμός
subject: Brouwer
subject: Mathematics
subject: FOS: Mathematics
subject: Intuibonism

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη του θεωρήματος βεντάλιας του Brouwer. Για το σκοπό αυτό χρειάστηκε να παρουσιαστούν οι βασικές έννοιες και θεωρήματα της ιντουισιονιστικής ανάλυσης που προηγούνται ενοιολογικά του θεωρήματος βεντάλιας. Ιδιαίτερα αναπτύχθηκε μία ανακατασκευή της έννοιας της ιντουισιονιστικής συνάρτησης σύμφωνα με την οποία η αρχή συνέχειας δεν τίθεται αξιωματικά, αλλά αποδεικνύεται. Μετά την πλήρη παρουσίαση της απόδειξης του θεωρήματος βεντάλιας και την ανάπτυξη κάποιων συνεπειών του, ιδιαίτερα του θεωρήματος ομοιόμορφης συνέχειας των συναρτήσεων που ορίζονται σε ιντουισιονιστικό κλειστό διάστημα, μελετήθηκαν διασυνδέσεις μεταξύ σύγχρονων διατυπώσεων του θεωρήματος βεντάλιας. Ακόμη παρουσιάζεται και η κριτική στην απόδειξη του θεωρήματος βεντάλιας του Brouwer. Στο πλαίσιο αυτό μελετάται και το θεώρημα των Martino και Giaretta. Τέλος, στο παράρτημα, μελετώνται από κλασσική άποψη οι χώροι Baire και Cantor.
description: The aim of the present thesis was the study of Brouwer’s fan theorem. In order to give a complete description of Brouwer’s proof, a reconstruction of the basic intuitionistic concepts and results, necessary to the understanding of fan theorem, precedes its proof. Especially, the intuitionistic function is reconstructed such that the continuity principle is not treated as an axiom, but it is derived as a theorem. After a complete description of the proof of the fan theorem and the development of some of its consequences, especially of the uniform continuity theorem, interconnections between post-Brouwer formulations of fan theorem are studied. The critique to Brouwer’s proof is also included. In that context the theorem of Martino and Giaretta is presented. In the appendix, Baire and Cantor space are studied from the classical point of view.
Renormalization constants for Lattice QCD: new results from Numerical Stochastic Perturbation Theory
Creators: name: Di Renzo, Francesco
name: Miccio, Vincenzo
name: Scorzato, Luigi
name: Torrero, Christian
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: By making use of Numerical Stochastic Perturbation Theory (NSPT) we can compute renormalization constants for Lattice QCD to high orders, e.g. three or four loops for quark bilinears. We report on the status of our computations, which provide several results for Wilson quarks and in particular (values and/or ratios of) Z_V, Z_A, Z_S, Z_P. Results are given for various number of flavors (n_f = 0, 2, 3, 4). While we recall the care which is due for the computation of quantities for which an anomalous dimension is in place, we point out that our computational framework is well suited to a variety of other calculations and we briefly discuss the application of NSPT to other regularizations (in particular the Clover action).
description: 7 pages, talk given at Lattice 2006 (Quark Masses, Gauge Couplings, and Renormalization)
Additional file 1 of Translation and cultural adaptation of a romanian version of the communication assessment tool (CAT_Ro)
Creators: name: Balanescu, Andra Rodica
name: Bojinca, Violeta Claudia
name: Ana-Maria Schweitzer
name: Joca, Bogdan
name: Mardale, Denise Ani
name: Badea, Denisa
name: Bojinca, Mihai
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1.
Comparing Pedestrian Navigation Methods in Virtual Reality and Real Life
Creators: name: Savino, Gian-Luca
name: Emanuel, Niklas
name: Kowalzik, Steven
name: Kroll, Felix A.
name: Lange, Marvin C.
name: Laudan, Matthis
name: Leder, Rieke
name: Liang, Zhanhua
name: Markhabayeva, Dayana
name: Schmeißer, Martin
name: Schütz, Nicolai
name: Stellmacher, Carolin
name: Xu, Zihe
name: Bub, Kerstin
name: Kluss, Thorsten
name: Maldonado, Jaime
name: Kruijff, Ernst
name: Schöning, Johannes
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Mobile navigation apps are among the most used mobile applications and are often used as a baseline to evaluate new mobile navigation technologies in field studies. As field studies often introduce external factors that are hard to control for, we investigate how pedestrian navigation methods can be evaluated in virtual reality (VR). We present a study comparing navigation methods in real life (RL) and VR to evaluate if VR environments are a viable alternative to RL environments when it comes to testing these. In a series of studies, participants navigated a real and a virtual environment using a paper map and a navigation app on a smartphone. We measured the differences in navigation performance, task load and spatial knowledge acquisition between RL and VR. From these we formulate guidelines for the improvement of pedestrian navigation systems in VR like improved legibility for small screen devices. We furthermore discuss appropriate low-cost and low-space VR-locomotion techniques and discuss more controllable locomotion techniques.
Τα προγράμματα εισαγωγικής επιμόρφωσης από τη σκοπιά των διευθυντών των ΠΕΚ: μία κριτική αποτίμηση:
Creators: name: Μπλέτσα, Αναστασία Παύλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Προγράμματα εισαγωγικής επιμόρφωσης
Περιφερειακά επιμορφωτικά κέντρα
Επιμόρφωση
Teacher induction programs
Induction and training district centres
Training

description: Σκοπός της παρούσας διατριβής ήταν να αποτυπωθούν οι απόψεις των διευθυντών και των υποδιευθυντών των Περιφερειακών Επιμορφωτικών Κέντρων σε ό,τι αφορά στην αποτελεσματικότητα των προγραμμάτων εισαγωγικής επιμόρφωσης που παρέχονται από τα Περιφερειακά Επιμορφωτικά Κέντρα στους νεοδιόριστους εκπαιδευτικούς της χώρας μας. Συγκεκριμένα, παρουσιάσαμε τις απόψεις των διευθυντών και των υποδιευθυντών των Περιφερειακών Επιμορφωτικών Κέντρων σχετικά με την οργάνωση, τη χρονική διάρκεια και το περιεχόμενο των προγραμμάτων εισαγωγικής επιμόρφωσης. Εξετάσαμε τη στάση τους γύρω από την αναγκαιότητα παρακολούθησης των προγραμμάτων από τους νεοδιόριστους εκπαιδευτικούς, καθώς και τις προτάσεις τους για την αποτελεσματικότερη υλοποίηση προγραμμάτων εισαγωγικής επιμόρφωσης. Ακόμη πραγματοποιήσαμε μία γενική αναφορά στην αναγκαιότητα ύπαρξης του θεσμού της επιμόρφωσης και παρουσιάσαμε την εξέλιξη των προγραμμάτων εισαγωγικής επιμόρφωσης από την καθιέρωσή τους στα Περιφερειακά Επιμορφωτικά Κέντρα μέχρι σήμερα. Επιπλέον, πραγματοποιήσαμε μία ανασκόπηση της σχετικής με τα προγράμματα εισαγωγικής επιμόρφωσης βιβλιογραφίας παραθέτοντας αναλυτικά τις σχετικές έρευνες που έχουν πραγματοποιηθεί.
description: The aim of the present thesis was to indicate the opinions of the directors and the assistant directors of the Induction and Training District Centres regarding the effectiveness of teacher induction programs that are provided by the Induction and Training District Centres to the newly qualified teachers of our country. Specifically, we pointed out the views of the directors and the assistant directors with regard to the organization, the duration and the content of the teacher induction programs. We examined their point of view concerning the necessity of attendance by the newly qualified teachers as well as their suggestions for an effective realization of the teacher induction programs. Furthermore, we realized a general reference to the necessity of the institution of training and we made known the progress of teacher induction programs from their establishment to nowadays. Moreover, we demonstrated a detailed bibliography review associated with the teacher induction programs by indicating all the relative scientific researches that have been realized.
Level attraction and exceptional points in a resonant spin-orbit torque system
Creators: name: Proskurin, Igor
name: Stamps, Robert L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Level attraction can appear in driven systems where instead of repulsion two modes coalesce in a region separated by two exceptional points. This behavior was proposed for optomechanical and optomagnonic systems, and recently observed for dissipative cavity magnon-polaritons. We demonstrate that such a regime exists in a spin-orbit torque system where a magnetic oscillator is resonantly coupled to an electron reservoir. An instability mechanism necessary for mode attraction can be provided by applying an electric field. The field excites interband transitions between spin-orbit split bands leading to an instability of the magnetic oscillator. Two exceptional points then appear in the oscillator energy spectrum and the region of instability. We discuss conditions under which this can occur and estimate the electric field strength necessary for reaching the attraction region for a spin-orbit torque oscillator with Rashba coupling. A proposal for experimental detection is made using magnetic susceptibility measurements.
description: 10 pages, 4 figures, REVTeX4.2 style
Statistical Models for Solar Flare Interval Distribution in Individual Active Regions
Creators: name: Kubo, Yuki
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This article discusses statistical models for solar flare interval distribution in individual active regions. We analyzed solar flare data in 55 active regions that are listed in the GOES soft X-ray flare catalog. We discuss some problems with a conventional procedure to derive probability density functions from any data set and propose a new procedure, which uses the maximum likelihood method and Akaike Information Criterion (AIC) to objectively compare some competing probability density functions. We found that lognormal and inverse Gaussian models are more likely models than the exponential model for solar flare interval distribution in individual active regions. The results suggest that solar flares do not occur randomly in time; rather, solar flare intervals appear to be regulated by solar flare mechanisms. We briefly mention a probabilistic solar flare forecasting method as an application of a solar flare interval distribution analysis.
description: 15 pages, 2 figures, 3 tables, accepted for publication in Solar Physics
Η Επικούρεια τέχνη του ζην:
Creators: name: Sima, Beatrix Γιοζεφ (Σίμα Μπέατριξ)
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Ηδονή
Αυτάρκεια
Φιλία
Pleasure
Autarky
Friendship

description: H παρούσα εργασία έχει σκοπό να παρουσιάσει την επικούρεια ηθική και κυρίως να αναδείξει την διαύγεια της σκέψης του Επίκουρου, καθώς και τη συνέπεια, με την οποία οικοδομεί το σύστημα του. Οι ραγδαίες αλλαγές του κοινωνικοπολιτικού γίγνεσθαι προς το τέλος του 4ου αιώνα π.Χ. επέφεραν καινοτομίες και μια νέα προσέγγιση του πραγματικού και στη φιλοσοφία. Κύρια μέριμνα της φιλοσοφίας των ελληνιστικών χρόνων είναι ο άνθρωπος και τα προβλήματά του. Το κεντρικό ερώτημα της φιλοσοφίας "τι είναι καλό" ή "τι είναι αρετή" των κλασσικών χρόνων, μετατρέπεται στο "πώς πρέπει να ζήσω για να ευτυχήσω". Η επικούρεια ηθική θεμελιωμένη στη λογική και στη φυσική, υπόσχεται μία λύση προσιτή σε όλους όσοι την ακολουθούν πιστά και συνειδητά. Η δραστηριότητα του νου -μνήμη και φαντασία- κρατούν το κλειδί για μια ευδαίμονα ζωή και αυτή είναι που ελέγχει και κατευθύνει τον επικούρειο ηδονισμό.
description: This project is aiming to present the Epicurean moral and especially to highlight the clarity of Epicuros’s thinking and the consistence with which he creates his system. The rapid changes in the sociopolitical scene of the late 4th century B.C. brought about innovations and a new approach of reality in philosophy. The main concern of filosophy in the hellenistic years is the individual and his problems.A central question becomes from ‘what is good’ or ‘what is a virtue’ of the classical period, to ‘how I have to live so as to be happy’. The Epicurean ethics, established on logic and physics, promises a solution available to all those who follow it with faith and consequence. The activity of mind, that is memory and imagination, holds the key to a more fulfilling life which is what controls and directs the Epicurean hedonism.
The nonabelian product modulo sum
Creators: name: Corson, Samuel M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Group Theory (math.GR)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03E75, 20A15, 55Q52

description: It is shown that if $\{H_n\}_{n \in ω}$ is a sequence of groups without involutions, with $1 < |H_n| \leq 2^{\aleph_0}$, then the topologist's product modulo the finite words is (up to isomorphism) independent of the choice of sequence. This contrasts with the abelian setting: if $\{A_n\}_{n \in ω}$ is a sequence of countably infinite torsion-free abelian groups, then the isomorphism class of the product modulo sum $\prod_{n \in ω} A_n/\bigoplus_{n \in ω} A_n$ is dependent on the sequence.
Moiré edge states in twisted bilayer graphene and their topological relation to quantum pumping
Creators: name: Fujimoto, Manato
name: Koshino, Mikito
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the edge states of twisted bilayer graphene and their topological origin. We show that the twisted bilayer graphene has special edge states associated with the moiré pattern, and the emergence of these moiré edge states is linked with the sliding Chern number, which describes topological charge pumping caused by relative interlayer sliding. When one layer of the twisted bilayer is relatively slid with respect to the other layer, the edge states are transferred from a single band to another across the band gap, and the number of the edge states pumped in a sliding cycle is shown to be equal to the sliding Chern number of the band gap. The relationship can be viewed as a manifestation of the bulk-edge correspondence inherent in moiré bilayer systems.
description: 7 pages, 5 figures
An experimental method for the in-situ observation of eutectic growth patterns in bulk samples of transparent alloys
Creators: name: Bottin-Rousseau, Sabine
name: Perrut, Mikael
name: Picard, Christian
name: Akamatsu, Silvère
name: Faivre, Gabriel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present an experimental method for the in-situ observation of directional-solidification fronts in bulk samples of transparent eutectic alloys. The growth front is observed obliquely in dark field through the liquid and a glass wall of the container with a long-distance microscope. We show that a focused image of the whole growth front can be obtained at a certain tilt angle of the microscope. At this tilt angle, eutectic fibers of about 3.5\mic in diameter can be clearly seen over the whole growth front in 400-\mic thick samples.
Extracting alpha from B0(d) --> K0 anti-K0 Decays
Creators: name: Datta, Alakabha
name: Imbeault, Maxime
name: London, David
name: Matias, Joaquim
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: We propose a new method for obtaining the CP phase alpha, based on measurements of B0(d) --> K0 anti-K0, along with theoretical input. Due to the similarities of QCD factorization (QCDf) and perturbative QCD (pQCD), this input is basically the same for each of these models. Although the theoretical error is large at present, many of the contributing quantities will be better known in the future, leading to a smaller error. One outstanding question is the extent to which the precision on quark masses, especially m_c/m_b, can be improved. If one assumes that new physics is not present, the method can be used to predict the values of CP asymmetries in B0(d) --> K0 anti-K0: 0.02 <= A_{dir}^2 + A_{mix}^2 <= 0.125. A result outside this range would signal the existence of long-distance effects beyond those included in models of nonleptonic decays based on factorization (such as QCDf and pQCD), or the presence of new physics.
description: 5 pages, To appear in PRD
Review of the particle background of the Athena X-IFU instrument
Creators: name: Lotti, Simone
name: D'Andrea, Matteo
name: Molendi, Silvano
name: Macculi, Claudio
name: Minervini, Gabriele
name: Fioretti, Valentina
name: Laurenza, Monica
name: Jacquey, Christian
name: Piro, Luigi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: X-ray observations are limited by the background, due to intrinsic faintness or diffuse nature of the sources. The future Athena X-ray observatory has among its goals the characterization of these sources. We aim at characterizing the particle-induced background of the Athena microcalorimeter, in both its low (Soft Protons) and high (GCR) energy induced components, to assess the instrument capability to characterize background dominated sources such as the outskirts of clusters of galaxies. We compare two radiation environments, namely the L1 and L2 Lagrangian points, and derive indications against the latter. We estimate the particle-induced background level on the X-IFU microcalorimeter with Monte Carlo simulations, before and after all the solutions adopted to reduce its level. Concerning the GCR induced component the background level is compliant with the mission requirement. Regarding the Soft Protons component, the analysis does not predict dramatically different backgrounds in the L1 and L2 orbits. However, the lack of data concerning the L2 environment labels it as very weakly characterizable, and thus we advise against its choice as orbit for X-ray missions. We then use these background levels to simulate the observation of a typical galaxy cluster from its center out to 1.2 R200 to probe the characterization capabilities of the instrument out to the outskirts. We find that without any background reduction it is not possible to characterize the properties of the cluster in the outer regions. We also find no improvement of the observations when carried out during the solar maximum with respect to the solar minimum conditions.
Ο ρόλος και η συμβολή της ΑΣΠΑΙΤΕ στη δευτεροβάθμια επαγγελματική εκπαίδευση: το παράδειγμα του ετήσιου προγράμματος παιδαγωγικής κατάρτισης (ΕΠΠΑΙΚ)
Creators: name: Κούτουλα, Ασημένια Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: ΑΣΠΑΙΤΕ
ΕΠΠΑΙΚ
Κατάρτιση
ASPETE
EPPEK
Training

description: Σκοπός της παρούσας μεταπτυχιακής εργασίας ήταν η διερεύνηση του ρόλου και της συμβολής της Ανώτατης Σχολής Παιδαγωγικής και Τεχνολογικής Εκπαίδευσης (Α.Σ.ΠΑΙ.Τ.Ε.) στη Δευτεροβάθμια Επαγγελματική Εκπαίδευση της χώρας μας και πιο συγκεκριμένα η εξέταση της αποτελεσματικότητας του Ετήσιου Προγράμματος Παιδαγωγικής Κατάρτισης (Ε.Π.ΠΑΙ.Κ.) στην κατάρτιση των υποψήφιων εκπαιδευτικών. Η εργασία χωρίζεται σε δύο μέρη, στο θεωρητικό και το ερευνητικό. Στο θεωρητικό μέρος εξετάσαμε την ιστορική πορεία της δευτεροβάθμιας επαγγελματικής εκπαίδευσης στον ελλαδικό χώρο, τις νομοθετικές ρυθμίσεις που αφορούν την είσοδο των εκπαιδευτικών στο επάγγελμα, την ιστορική εξέλιξη της Σχολής Εκπαιδευτικών Λειτουργών Επαγγελματικής και Τεχνικής Εκπαίδευσης (Σ.Ε.Λ.Ε.Τ.Ε.) μέχρι την κατάργησή της, την ίδρυση της Α.Σ.ΠΑΙ.Τ.Ε. και την παιδαγωγική κατάρτιση που παρέχεται στο Ετήσιο Πρόγραμμα Παιδαγωγικής Κατάρτισης (Ε.Π.ΠΑΙ.Κ.). Στο ερευνητικό μέρος διερευνήσαμε τόσο το προφίλ όσο και τις απόψεις των σπουδαστών του Ε.Π.ΠΑΙ.Κ. σχετικά με την οργάνωση του Προγράμματος, τη θεωρητική παιδαγωγική κατάρτιση, τις Πρακτικές Ασκήσεις Διδασκαλίας, τα εργαστηριακά μαθήματα, το σύστημα επιλογής των σπουδαστών, τον τρόπο αξιολόγησής τους. Ακόμη, έγινε προσπάθεια να διερευνήσουμε τις απόψεις των σπουδαστών σχετικά με τις γνώσεις, τις δεξιότητες και της διδακτικές ικανότητες που αποκόμισαν από τη φοίτησή τους στο Πρόγραμμα.
description: The aim of the present thesis was to investigate the role and the contribution of the School of Pedagogical and Technological Education (ASPETE) in secondary vocational education in our country and especially to examine the contribution of the Annual Pedagogical Training Program (EPPEK) to the training of prospective teachers. The thesis is divided into two parts, the theoretical and research. In the theoretical part, we examined the history of vocational secondary education in Greece, laws, regulations concerning the entry of teachers into the profession, the historical development of the School Educators Professional and Technical Education (SELETE) until its abolition, the establishment of ASPETE and educational training offered at the Annual Pedagogical Training Program. The research investigated the profile and views of EPPEK students on the organization of the program, the theoretical pedagogical training, Teaching Practice Sessions, laboratory courses, the selection process of individual candidates and the method of their evaluation. Furthermore, an attempt was made to explore the views of students on their knowledge, abilities and teaching skills gained from their attendance in the Program.
On the origin of the Fe K-alpha line cores in Active Galactic Nuclei
Creators: name: Nandra, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: X-ray observations with Chandra and XMM-Newton have shown that there are relatively narrow cores to the iron K-alpha emission lines in active galactic nuclei (AGN). Plausible origins for this core emission include the outer regions of an accretion disk, a pc-scale molecular torus, and the optical broad-line region (BLR). Using data from the literature it is shown that no correlation exists between the Fe K-alpha core width and the BLR (specifically H-beta) line width. This shows that in general the iron K-alpha core emission does not arise from the BLR. There is a similar lack of correlation between the width of the Fe K-alpha core and black hole mass. The average K-alpha width is about a factor of two lower than the H-beta width. It therefore seems likely that in many cases the narrow core arises in the torus. There is a very wide range of observed Fe K-alpha core widths, however, and this argues for multiple origins. The simplest explanation for the observed line profiles in AGN is that they are due to a mixing of very narrow emission from the inner edge of the torus, and broadened emission from the accretion disk, in varying proportions from object-to-object.
description: 5 pages, 2 figures, accepted for publication in MNRAS Letters
Additional file 1 of Molecular investigation of an outbreak associated with total parenteral nutrition contaminated with NDM-producing Leclercia adecarboxylata
Creators: name: Garza-González, Elvira
name: Bocanegra-Ibarias, Paola
name: Rodríguez-Noriega, Eduardo
name: González-Díaz, Esteban
name: Silva-Sanchez, Jesús
name: Garza-Ramos, Ulises
name: Contreras-Coronado-Tovar, Iván Fernando
name: Santos-Hernández, José Ecil
name: Gutiérrez-Bañuelos, David
name: Mena-Ramirez, Juan Pablo
name: Saúl Ramírez-De-Los-Santos
name: Camacho-Ortiz, Adrián
name: Morfín-Otero, Rayo
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: S1 Table. Demographic characteristic of patients.
A Note on Pseudo-Hermitian Systems with Point Interactions and Quantum Separability
Creators: name: Fei, Shao-Ming
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the quantum entanglement and separability of Hermitian and pseudo-Hermitian systems of identical bosonic or fermionic particles with point interactions. The separability conditions are investigated in detail.
description: 6 pages
Properties of the remnant disk and the dynamical ejecta produced in low-mass black hole-neutron star mergers
Creators: name: Hayashi, Kota
name: Kawaguchi, Kyohei
name: Kiuchi, Kenta
name: Kyutoku, Koutarou
name: Shibata, Masaru
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We systematically perform numerical-relativity simulations for low-mass black hole-neutron star mergers for the models with seven mass ratios $Q=M_{\rm BH}/M_{\rm NS}$ ranging from 1.5 to 4.4, and three neutron-star equations of state, focusing on properties of matter remaining outside the black hole and ejected dynamically during the merger. We pay particular attention to the dependence on the mass ratio of the binaries. It is found that the rest mass remaining outside the apparent horizon after the merger depends only weakly on the mass ratio for the models with low mass ratios. It is also clarified that the rest mass of the ejecta has a peak at $Q \sim 3$, and decreases steeply as the mass ratio decreases for the low mass-ratio case. We present a novel analysis method for the behavior of matter during the merger, focusing on the matter distribution in the phase space of specific energy and specific angular momentum. Then we model the matter distribution during and after the merger. Using the result of the analysis, we discuss the properties of the ejecta.
description: 16 pages, 9 figures
Additional file 2 of Molecular investigation of an outbreak associated with total parenteral nutrition contaminated with NDM-producing Leclercia adecarboxylata
Creators: name: Garza-González, Elvira
name: Bocanegra-Ibarias, Paola
name: Rodríguez-Noriega, Eduardo
name: González-Díaz, Esteban
name: Silva-Sanchez, Jesús
name: Garza-Ramos, Ulises
name: Contreras-Coronado-Tovar, Iván Fernando
name: Santos-Hernández, José Ecil
name: Gutiérrez-Bañuelos, David
name: Mena-Ramirez, Juan Pablo
name: Saúl Ramírez-De-Los-Santos
name: Camacho-Ortiz, Adrián
name: Morfín-Otero, Rayo
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 2: S2 Table. Antibiotics resistance family genes identified in the genomes of L. adecarboxylata included in the analysis.
Essays on quality competition
Creators: name: Zhou, Dongsheng
Publisher: name: University of British Columbia
Year: 2009

description: This thesis focuses on the economics of quality differentiation. It consists of three chapters. The first chapter examines, under both Bertrand price and Cournot quantity competitions, the optimal investment policies in a vertically differentiated industry. It shows that there exists asymmetry between the optimal policies of low-quality and high-quality exporting countries with respect to subsidizing or taxing investments in quality improvement of exports. Under Bertrand competition it is optimal for the low-quality country to subsidize investments that raise the quality of its exports, while the high-quality country has an incentive to tax investments in improving the quality of its exports. Under Cournot competition, the results are reversed. The second chapter examines two widely used non-tariff barriers (NTBs), quotas and minimum quality standard (MQS) requirements. It investigates the effects of these two NTBs in a vertically differentiated industry consisting of one foreign and one domestic firm. It shows that a quota on low-quality imports improves the home country's welfare while a quota on high-quality imports reduces, in most cases, the home country's welfare. It also finds that the imposition of an MQS on low-quality imports lowers the home country's welfare. The third chapter examines the welfare consequences of offering a voluntary quality certification program in addition to requiring products to meet some minimum quality standard (MQS) when the quality of a product is unobservable. It considers a model of duopolistic competition in which price and qualities are decision variables. The chapter shows that providing an option of voluntary certification at a higher quality level instead of requiring all firms to meet and obtain certification at a particular designated level (MQS) is welfare increasing. Furthermore, it shows that in this situation the optimal MQS will be lower than the optimal MQS when there is only one mandated level of certification while the higher quality level will be higher than it.
Recipes for stellar jets: results of combined optical/infrared diagnostics
Creators: name: Podio, Linda
name: Bacciotti, Francesca
name: Nisini, Brunella
name: Eislöffel, Jochen
name: Massi, Fabrizio
name: Giannini, Teresa
name: Ray, Thomas P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We examine the conditions of the plasma along a sample of 'classical' Herbig-Haro jets located in the Orion and Vela star forming regions, through combined optical-infrared spectral diagnostics. Our sample includes HH 111, HH 34, HH 83, HH 73, HH 24 C/E, HH 24 J, observed at moderate spatial/spectral resolution. The obtained spectra cover a wide wavelength range from 0.6-2.5 um, including many transitions from regions of different excitation conditions. This allows us to probe the density and temperature stratification which characterises the cooling zones behind the shock fronts along the jet. The derived physical parameters (such as the extinction, the electron density and temperature, the ionisation fraction, and the total density) are used to estimate the depletion onto dust grains of Calcium and Iron with respect to solar abundances. This turns out to be between 70% and 0% for Ca and ~90% for Fe, suggesting that the weak shocks present in the beams are not capable of completely destroying the dust grains. We then derive the mass flux rates (Mdot_jet is on average 5 10^-8 M_solar yr^-1) and the associated linear momentum fluxes. The latter are higher than, or of the same order as, those measured in the coaxial molecular flows, suggesting that the flows are jet driven. Finally, we discuss differences between jets in our sample.
description: 19 pages, 15 figures, accepted by A&A
Pseudospectral methods with PML for nonlinear Klein-Gordon equations in classical and non-relativistic regimes
Creators: name: Antoine, Xavier
name: Zhao, Xiaofei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 81Q05, 80M22, 37M15

description: Two different Perfectly Matched Layer (PML) formulations with efficient pseudo-spectral numerical schemes are derived for the standard and non-relativistic nonlinear Klein-Gordon equations (NKGE). A pseudo-spectral explicit exponential integrator scheme for a first-order formulation and a linearly implicit preconditioned finite-difference scheme for a second-order formulation are proposed and analyzed. To obtain a high spatial accuracy, new regularized Bermúdez type absorption profiles are introduced for the PML. It is shown that the two schemes are efficient, but the linearly implicit scheme should be preferred for accuracy purpose when used within the framework of pseudo-spectral methods combined with the regularized Bermúdez type functions. In addition, in the non-relativistic regime, numerical examples lead to the conclusion that the error related to regularized Bermúdez type absorption functions is insensitive to the small parameter $\varepsilon$ involved in the NKGE. The paper ends by a two-dimensional example showing that the strategy extends to the rotating NKGE where the vortex dynamics is very well-reproduced.
description: 26 pages
Additional file 3 of Molecular investigation of an outbreak associated with total parenteral nutrition contaminated with NDM-producing Leclercia adecarboxylata
Creators: name: Garza-González, Elvira
name: Bocanegra-Ibarias, Paola
name: Rodríguez-Noriega, Eduardo
name: González-Díaz, Esteban
name: Silva-Sanchez, Jesús
name: Garza-Ramos, Ulises
name: Contreras-Coronado-Tovar, Iván Fernando
name: Santos-Hernández, José Ecil
name: Gutiérrez-Bañuelos, David
name: Mena-Ramirez, Juan Pablo
name: Saúl Ramírez-De-Los-Santos
name: Camacho-Ortiz, Adrián
name: Morfín-Otero, Rayo
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 3: S3 Table. Class 1 integron identified in the L. adecarboxylata 16,342 and 16,400 genomes.
Additional file 4 of Molecular investigation of an outbreak associated with total parenteral nutrition contaminated with NDM-producing Leclercia adecarboxylata
Creators: name: Garza-González, Elvira
name: Bocanegra-Ibarias, Paola
name: Rodríguez-Noriega, Eduardo
name: González-Díaz, Esteban
name: Silva-Sanchez, Jesús
name: Garza-Ramos, Ulises
name: Contreras-Coronado-Tovar, Iván Fernando
name: Santos-Hernández, José Ecil
name: Gutiérrez-Bañuelos, David
name: Mena-Ramirez, Juan Pablo
name: Saúl Ramírez-De-Los-Santos
name: Camacho-Ortiz, Adrián
name: Morfín-Otero, Rayo
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 4: S4 Table. Incompatibility groups identified in the genomes of L. adecarboxylata included in the analysis.
Improving efficiency in radio surveys for gravitational lenses
Creators: name: Jackson, N.
name: Browne, I. W. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Many lens surveys have hitherto used observations of large samples of background sources to select the small minority which are multiply imaged by lensing galaxies along the line of sight. Recently surveys such as SLACS and OLS have improved the efficiency of surveys by pre-selecting double-redshift systems from SDSS. We explore other ways to improve survey efficiency by optimum use of astrometric and morphological information in existing large-scale optical and radio surveys. The method exploits the small position differences between FIRST radio positions of lensed images and the SDSS lens galaxy positions, together with the marginal resolution of some larger gravitational lens systems by the FIRST beam. We present results of a small pilot study with the VLA and MERLIN, and discuss the desirable criteria for future surveys.
description: Accepted by MNRAS. 9 pages, 5 figures
Quasinormal modes and second order thermodynamic phase transition for Reissner-Nordström black hole
Creators: name: Jing, Jiliang
name: Pan, Qiyuan
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The relation between the quasinormal modes (QNMs) and the second order thermodynamic phase transition (SOTPT) for the Reissner-Nordström (RN) black hole is studied. It is shown that the quasinormal frequencies of the RN black hole start to get a spiral-like shape in the complex $ω$ plane and both the real and imaginary parts become the oscillatory functions of the charge if the real part of the quasinormal frequencies arrives at its maximum at the second order phase transition point of Davies for given overtone number and angular quantum number. That is to say, we can find out the SOTPT point from the QNMs of the RN black hole. The fact shows that the quasinormal frequencies carry the thermodynamical information of the RN black hole.
description: 10 pages, 5 figures
Stated skein modules of 3-manifolds and TQFT
Creators: name: Costantino, Francesco
name: Le, Thang T. Q.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: Primary 57N10, Secondary: 57M25

description: We study the behaviour of the Kauffman bracket skein modules of 3-manifolds under gluing along surfaces. For this purpose we extend the notion of Kauffman bracket skein modules to $3$-manifolds with marking consisting of open intervals and circles in the boundary. The new module is called the stated skein module.
 The first main results concern non-injectivity of certain natural maps defined when forming connected sums along a sphere or along a closed disk. These maps are injective for surfaces, or for generic quantum parameter, but we show that in general they are not injective when the quantum parameter is a root of 1. The result applies to the classical skein modules as well. A particular interesting result is that when the quantum parameter is a root of 1, the empty skein is zero in a connected sum where each constituent manifold has non-empty marking.
 We also prove various non injectivity results for the Chebyshev-Frobenius map and the natural map induced by the deletion of marked balls.
 We then consider the general case of gluing along a surface, showing that the stated skein module can be interpreted as a monoidal symmetric functor from a category of "decorated cobordisms" to a Morita category of algebras and their bimodules. We apply this result to deduce several properties of stated skein modules as a Van-Kampen like theorem as well as a computation through Heegaard decompositions and a relation to Hochshild homology for trivial circle bundles over surfaces.
description: 37 pages
Numerical Investigation of Traffic State Reconstruction and Control Using Connected Automated Vehicles
Creators: name: Cicic, Mladen
name: Barreau, Matthieu
name: Johansson, Karl Henrik
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: In this paper we present a numerical study on control and observation of traffic flow using Lagrangian measurements and actuators. We investigate the effect of some basic control and observation schemes using probe and actuated vehicles within the flow. The aim is to show the effect of the state reconstruction on the efficiency of the control, compared to the case using full information about the traffic. The effectiveness of the proposed state reconstruction and control algorithms is demonstrated in simulations. They show that control using the reconstructed state approaches the full-information control when the gap between the connected vehicles is not too large, reducing the delay by more than $60\%$ when the gap between the sensor vehicles is $1.25$~km on average, compared to a delay reduction of almost $80\%$ in the full-information control case. %It shows that the reconstruction is well achieved if the distance between two connected and autonomous vehicles is not too large (more than 1 vehicle per kilometer). %We also show that it is possible to further improve the control performance by employing a simple adaptive probe vehicle selection scheme. Moreover, we propose a simple scheme for selecting which vehicles to use as sensors, in order to reduce the communication burden. Numerical simulations demonstrate that %It also demonstrates that it is possible to reduce the communication burden using a triggering mechanism with with this triggering mechanism, the delay is reduced by around $65\%$, compared to a reduction of $72\%$ if all connected vehicles are communicating at all times.
Quark Gluon Jet Discrimination with Weakly Supervised Learning
Creators: name: Lee, Jason Sang Hun
name: Lee, Sang Man
name: Lee, Yunjae
name: Park, Inkyu
name: Watson, Ian James
name: Yang, Seungjin
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Deep learning techniques are currently being investigated for high energy physics experiments, to tackle a wide range of problems, with quark and gluon discrimination becoming a benchmark for new algorithms. One weakness is the traditional reliance on Monte Carlo simulations, which may not be well modelled at the detail required by deep learning algorithms. The weakly supervised learning paradigm gives an alternate route to classification, by using samples with different quark--gluon proportions instead of fully labeled samples. The paradigm has, therefore, huge potential for particle physics classification problems as these weakly supervised learning methods can be applied directly to collision data. In this study, we show that realistically simulated samples of dijet and Z+jet events can be used to discriminate between quark and gluon jets by using weakly supervised learning. We implement and compare the performance of weakly supervised learning for quark--gluon jet classification using three different machine learning methods: the jet image-based convolutional neural network, the particle-based recurrent neural network and the feature-based boosted decision tree.
Single-Site Entanglement of Fermions at a Quantum Phase Transition
Creators: name: Larsson, Daniel
name: Johannesson, Henrik
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show that the single-site entanglement of a generic spin-1/2 fermionic lattice system can be used as a reliable marker of a finite-order quantum phase transition, given certain provisos. We discuss the information contained in the single-site entanglement measure, and provide illustrations from the Mott-Hubbard metal-insulator transitions of the one-dimensional Hubbard model, and the Hubbard model with long-range hopping.
description: 4 pages, no figure. Published version