cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ποινική αντιμετώπιση των επιθέσεων κατά συστημάτων πληροφοριών: Εθνικό, διεθνές και ενωσιακό νομοθετικό πλαίσιο.
Creators: name: Νάκη, Ελένη Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Συστήματα πληροφοριών
Σύμβαση για το κυβερνοέγκλημα
Οδηγία 2013/40/ΕΕ
Information systems
Convention on cybercrime
Directive 2013/40/EU

description: Η παρούσα διπλωματική εργασία πραγματεύεται το ζήτημα των επιθέσεων κατά συστημάτων πληροφοριών και της ποινικής αντιμετώπισής τους στο πλαίσιο της εσωτερικής, διεθνούς και ενωσιακής έννομης τάξης. Καταρχάς εξετάζουμε τις διάφορες μορφές που λαμβάνουν οι παραπάνω επιθέσεις και το έννομο αγαθό που πλήττουν, ειδικότερο περιεχόμενο του οποίου αποτελεί η εμπιστευτικότητα, η ακεραιότητα και η διαθεσιμότητα των συστημάτων πληροφοριών και των ηλεκτρονικών δεδομένων. Στη συνέχεια εξετάζουμε και αναλύουμε τις διατάξεις του ελληνικού ΠΚ και των ειδικών ποινικών νόμων που προστατεύουν αμέσως ή εμμέσως το παραπάνω έννομο αγαθό. Από την παραπάνω ανάλυση αναδεικνύονται τα κενά προστασίας για το έννομο αγαθό. Ακολούθως παρουσιάζονται τα χαρακτηριστικά της ποινικοποίησης στα διεθνή και ευρωπαϊκά νομοθετήματα που αφορούν στις επιθέσεις κατά συστημάτων πληροφοριών, τα οποία είναι η Σύμβαση του Συμβουλίου της Ευρώπης για το κυβερνοέγκλημα και η Οδηγία 2013/40/ΕΕ. Στο τέλος της εργασίας εξάγονται τα βασικά συμπεράσματα για τις αλλαγές που πρέπει να υιοθετήσει ο Έλληνας νομοθέτης σε συμμόρφωση με τα ως άνω κείμενα, με αναφορά και στο νομοσχέδιο που κατατέθηκε στις 18.3.2016 για την κύρωση της Σύμβασης για το κυβερνοέγκλημα και τη μεταφορά της Οδηγίας 2013/44/ΕΕ στο εσωτερικό.
description: The present thesis discusses the issue of attacks against information systems and their legal treatment by means of criminal law within Greek, International and European legal order. At first we examine the various forms of the above mentioned attacks and the legal interest that they affect. The confidentiality, integrity and availability of information systems and computer data constitute the affected legal interest. Furthermore we examine and analyze the provisions of Greek Criminal Code and Special Criminal Laws that lead to direct or indirect protection of the above legal interest. This presentation reveals the protection gaps for information systems and computer data. Then we present the characteristics of criminalization in International and European legal instruments concerning attacks against information systems, namely the Convention of the Council of Europe on Cybercrime and the Directive 2013/40/EE. At the end we are led to some main conclusions concerning the changes that the Greek legislator shall adopt in compliance with the above mentioned legal instruments, also with reference to the bill that was filed with on 18.3.2016 for the ratification of the Convention on Cybercrime and the transposition of Directive 2013/44/EE into domestic law.
NNLO soft function for threshold single inclusive jet production
Creators: name: Balytskyi, Yaroslav
name: Gao, Jianbo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a computation of the global soft function for single-inclusive hadronic jet production at next-to-next-to-leading order (NNLO) in the strong coupling constant involving four light-like Wilson lines. Our soft function belongs to SCET$_{\text I}$ observables obeying the non-Abelian exponentiation theorem. We provide the calculation of the soft function involving four collinear light-cone directions for all $2\rightarrow2$ processes extending the previous result. We perform the threshold resummation for these processes at the next-to-next-to-leading logarithmic accuracy and present the corresponding numerical results.
A geometric proof of the Karpelevich-Mostow's theorem
Creators: name: Di Scala, Antonio J.
name: Olmos, Carlos
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 53C35

description: In this paper we give a geometric proof of the Karpelevich's theorem that asserts that a semisimple Lie subgroup of isometries, of a symmetric space of non compact type, has a totally geodesic orbit. In fact, this is equivalent to a well-known result of Mostow about existence of compatible Cartan decompositions.
A Hot DQ White Dwarf in the Open Star Cluster M35
Creators: name: Williams, Kurtis A.
name: Liebert, James
name: Bolte, Michael
name: Hanson, Robert B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of a hot DQ white dwarf, NGC 2168:LAWDS 28, that is a likely member of the 150-Myr old cluster NGC 2168 (Messier 35). The spectrum of the white dwarf is dominated by CII features. The effective temperature is difficult to estimate but likely > 20,000 K based on the temperatures of hot DQs with similar spectra. NGC2168:LAWDS 28 provides further evidence that hot DQs may be the ``missing'' high-mass helium-atmosphere white dwarfs. Based on published studies, we find that the DBA WD LP 475-242 is likely a member of the Hyades open cluster, as often assumed. These two white dwarfs are the entire sample of known He-atmosphere white dwarfs in open clusters with turnoff masses >2 solar masses. Based on the number of known cluster DA white dwarfs and a redetermination of the H-atmosphere:He-atmosphere ratio, commonly known as the DA:DB ratio, we re-examine the hypothesis that the H- to He-atmosphere ratio in open clusters is the same as the ratio in the field. Under this hypothesis, we calculate that five He-atmosphere WDs are expected to have been discovered, with a probability of finding fewer than three He-atmosphere white dwarfs of 0.08, or at the ~ 2-sigma level.
description: 9 pages with 2 figures, uses LaTeX/AASTeX 5.2. Accepted for publications in ApJ Letters
title: Investigation of chip jamming and drill breakage in deep-hole drilling using Smoothed Particle Hydrodynamics
Creators: name: Baumann, Andreas
name: Eberhard, Peter
Publisher: name: Universität Stuttgart
Year: 2024
Subjects: subject: 670

description: Single-lip deep hole drilling is characterized by a high-quality hole and a high level of productivity achieved. It is performed using high feed rates in a single pass, and, therefore, chips must be removed by the cooling liquid. However, chip jamming is a significant problem when chips wrap around the tool, leading to marks on the borehole wall and an increased drilling torque, potentially causing sudden tool failure. The Smoothed Particle Hydrodynamics method is applied to simulate the challenging fluid flow and elastic bodies. A first approach is developed to model the effects of chip jamming and the possible consequence of drill breakage for a deeper understanding of the process behavior.
Graphical Economies with Resale
Creators: name: Andrade, Gabriel P.
name: Frongillo, Rafael
name: Gorokhovsky, Elliot
name: Srinivasan, Sharadha
Publisher: name: arXiv
Year: 2021
Subjects: subject: Theoretical Economics (econ.TH)
subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: Kakade, Kearns, and Ortiz (KKO) introduce a graph-theoretic generalization of the classic Arrow--Debreu (AD) exchange economy. Despite its appeal as a networked version of AD, we argue that the KKO model is too local, in the sense that goods cannot travel more than one hop through the network. We introduce an alternative model in which agents may purchase goods on credit in order to resell them. In contrast to KKO, our model allows for long-range trade, and yields equilibria in more settings than KKO, including sparse endowments. Our model smoothly interpolates between the KKO and AD equilibrium concepts: we recover KKO when the resale capacity is zero, and recover AD when it is sufficiently large. We give general equilibrium existence results, and an auction-based algorithm to compute approximate equilibria when agent utilities satisfy the weak gross-substitutes property.
description: Accepted for publication in proceedings of the 22nd ACM Conference on Economics and Computation (EC '21). 33 pages
Συστήματα βιντεοεπιτήρησης και προστασία προσωπικών δεδομένων
Creators: name: Βαρύτη, Μαρία Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Συστήματα βιντεοεπιτήρησης
Ιδιωτικοί και δημόσιοι χώροι
Προστασία προσωπικών δεδομένων
Video surveillance systems
Private and public places
Personal data protection

description: Τα συστήματα βιντεοεπιτήρησης έχουν πλέον θέση στην καθημερινή μας ζωή και ως εκ τούτου δεν μπορούμε να τα "αγνοούμε", καθώς η χρήση τους δύναται να συνεπάγεται περιορισμούς για ορισμένα ατομικά δικαιώματα. Μέχρι σήμερα, η βιντεοεπιτήρηση σε ευρωπαϊκό επίπεδο δεν έχει αποτελέσει αντικείμενο αυτοτελούς νομοθετήματος, με αποτέλεσμα να αναζητούμε την οριοθέτησή της σε νομικά κείμενα, δεσμευτικά ή μη, που έχουν εφαρμογή στα διακυβευόμενα δικαιώματα. Σε εθνικό επίπεδο έγινε μια προσπάθεια ρύθμισης της βιντεοεπιτήρησης με την έκδοση του Ν.3917/2011, αλλά, όσον αφορά τη βιντεοεπιτήρηση δημόσιων χώρων, ο νόμος αυτός δεν έχει ακόμη εφαρμογή. Θα πρέπει να διακρίνουμε τη βιντεοεπιτήρηση, σε βιντεοεπιτήρηση ιδιωτικών χώρων, δημόσιων χώρων και χώρων που δεν είναι δημόσιοι, με την έννοια του νόμου, αλλά είναι προσβάσιμοι στο κοινό. Σε κάθε μία από αυτές τις κατηγορίες έχει εφαρμογή ξεχωριστό θεσμικό πλαίσιο. Η περίπτωση της βιντεοεπιτήρησης δημόσιων χώρων είναι η περίπτωση που απασχόλησε τον Έλληνα νομοθέτη περισσότερο και προκάλεσε τις εντονότερες αντιδράσεις της Αρχής Προστασίας Δεδομένων Προσωπικού Χαρακτήρα και της θεωρίας, καθώς ουσιαστικά συνδέεται με τη θέση της ασφάλειας, προσωπικής και δημόσιας, μέσα στο σύστημα της έννομης προστασίας μας και με την εμπιστοσύνη στους θεσμούς της Δημοκρατίας μας.
description: Now days, video surveillance systems affect our every day lives and therefore, we can not "ignore" them, since their use could lead to a restriction of certain individual rights. Until today, the video surveillance at a European level is not an autonomous statute, thus seeking its delimitation in legal documents, binding or not, which apply to rights at stake. At a national level there has been an effort to regulate video surveillance by issuing Law 3917/2011. However, as far as video surveillance in public places is concerned, this law is not applicable. It is essential to distinguish video surveillance in this of private places, of public places and of spaces that are not public, according to law, but are accessible to the public. In each of these categories applies a separate institutional framework. The case of video surveillance of public spaces has mostly preoccupied Greek legislators and has caused the strongest reactions from the part of the Authority for the Protection of Personal Data and from the part of the theory as it is technically connected to the position of private and safety public in our legal protection system and to the confidence we have in the institutions of our Democracy.
New tools for assessing personal exposure near urban air pollution hotspots
Creators: name: Tsegas, George
name: Moussiopoulos, Nicolas
Publisher: name: Karlsruhe
Year: 2019

description: During the last decade, researchers and policy makers have focused on the development and deployment of air pollution mitigation measures invoking solutions based on technology transfer. This term encompasses the synthesis of air quality monitoring, primarily by networks of inexpensive sensors, remote sensing and numerical modelling, as tools for supporting policy makers and disseminating air quality information to the citizens. It has been recognised that localised concentration maxima developing around traffic sources represent an exposure contribution of major epidemiological significance. The ability, therefore, of an integrated air quality management system to reliably assess personal exposure heavily depends on the consistent numerical treatment of multiscale interactions which determine the flow and dispersion structures in these fine spatial scales. Moreover, it is important to incorporate innovative methodologies for enhancing the stability and error-resilience of the sensor networks themselves. The approach presented in this work focuses on the utilisation of latest developments both in sensor technology and numerical air quality modelling, so as to provide end products able to support regulatory assessment and environmental information services. A peer-to-peer network of air quality measuring devices is deployed in six urban areas in the Balkan region in order to provide real time air quality data over areas of high population and emissions density. The coupled mesoscale modelling system MEMO/ MARS-aero and the mesomicro MEMICO two-way coupling methodology implement the physical modelling core of the system in the respective spatial scales. These modelling tools are used to estimate, integrate and complement the sensor data on pollutant levels in predictions of high temporal and spatial resolution in order to highlight pollution hot spots. In the case of fine particulate matter, special adaptations are incorporated in the emissions and chemical transformation treatment in order to provide consistent number concentration fields, which constitute the most relevant exposure metric.
Στοιχεία διαπολιτισμικής επικοινωνίας στα κείμενα Νεοελληνικής Λογοτεχνίας της Α΄ τάξης Λυκείου
Creators: name: Μαστροσάββα, Θέμις Ιπποκράτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Διαπολιτισμική επικοινωνία στα κείμενα Νεοελληνικής Λογοτεχνίας
Λογοτεχνία και διαπολιτισμική εκπαίδευση
Η Διαπολιτισμική εκπαίδευση στο Λύκειο
Intercultural communication elements in the school books of Contemporary Greek Literature
Literature and intercultural education
Intercultural education in Lyceum

description: Είναι γεγονός ότι η πολυπολιτισμική σύνθεση του μαθητικού πληθυσμού και η συνεκπαίδευση παιδιών που είναι φορείς ενός διαφορετικού γλωσσικού και πολιτισμικού κεφαλαίου, διαμορφώνουν μια νέα πραγματικότητα στο ελληνικό σχολείο. Σε αυτό το πλαίσιο, επιβάλλεται αλλαγή στον τρόπο λειτουργίας του σύγχρονου σχολείου, αρχής γενομένης από τον εκπαιδευτικό, ο οποίος οφείλει να αναπροσαρμόσει τις μεθόδους του και να αξιοποιήσει κατάλληλα τα μέσα διδασκαλίας του, ώστε να προσεγγίζει αποτελεσματικά τα παιδιά με διαφορετικό πολυπολιτισμικό υπόβαθρο. Στην παρούσα εργασία εξετάζονται τα στοιχεία διαπολιτισμικής επικοινωνίας που υπάρχει στο σχολικό εγχειρίδιο των Κειμένων της Νεοελληνικής Λογοτεχνίας της Α΄ τάξης του Λυκείου, με στόχο να αποδειχθεί ότι τα κείμενα αυτά προσφέρουν σημεία προσέγγισης στα παιδιά που προέρχονται από διαφορετικά πολιτισμικά περιβάλλοντα .
description: It is a fact that the multicultural composition of the learning population as well as the education of children who bear a different language and cultural capital, form a new reality in Greek schools. In this framework, what is considered necessary is a change in the way contemporary schools work, beginning with the teachings practitioners, who should re-adapt their methods and suitably use their teaching media, so as to approach students with a diverse cultural background. In the present study, what is examined is the presence of intercultural communication elements in the school books of Contemporary Greek Literature for the first class of Lyceum. The aim is to prove that particular texts offer a form of approach to students coming from different cultural environments.
Krawtchouk polynomials and Krawtchouk matrices
Creators: name: Feinsilver, Philip
name: Kocik, Jerzy
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Krawtchouk matrices have as entries values of the Krawtchouk polynomials for nonnegative integer arguments. We show how they arise as condensed Sylvester-Hadamard matrices via a binary shuffling function. The underlying symmetric tensor algebra is presented. Our approach is used to solve Kac' formulation of the Ehrenfest urn model. Connections with quantum and classical random walks are shown as well as various extensions of the classical polynomials.
Kelvin Waves of Quantized Vortex Lines in Trapped Bose-Einstein Condensates
Creators: name: Simula, T. P.
name: Mizushima, T.
name: Machida, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We have theoretically investigated Kelvin waves of quantized vortex lines in trapped Bose-Einstein condensates. Counterrotating perturbation induces an elliptical instability to the initially straight vortex line, driven by a parametric resonance between a quadrupole mode and a pair of Kelvin modes of opposite momenta. Subsequently, Kelvin waves rapidly decay to longer wavelengths emitting sound waves in the process. We present a modified Kelvin wave dispersion relation for trapped superfluids and propose a simple method to excite Kelvin waves of specific wave number.
description: 4 pages, 4 figures, title changed, minor revisions
UNISWAP: Impermanent Loss and Risk Profile of a Liquidity Provider
Creators: name: Aigner, Andreas A.
name: Dhaliwal, Gurvinder
Publisher: name: arXiv
Year: 2021
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Computational Finance (q-fin.CP)
subject: General Finance (q-fin.GN)
subject: Portfolio Management (q-fin.PM)
subject: Risk Management (q-fin.RM)
subject: FOS: Economics and business
subject: J.4
subject: 62P20, 91B99

description: Uniswap is a decentralized exchange (DEX) and was first launched on November 2, 2018 on the Ethereum mainnet [1] and is part of an Ecosystem of products in Decentralized Finance (DeFi). It replaces a traditional order book type of trading common on centralized exchanges (CEX) with a deterministic model that swaps currencies (or tokens/assets) along a fixed price function determined by the amount of currencies supplied by the liquidity providers. Liquidity providers can be regarded as investors in the decentralized exchange and earn fixed commissions per trade. They lock up funds in liquidity pools for distinct pairs of currencies allowing market participants to swap them using the fixed price function. Liquidity providers take on market risk as a liquidity provider in exchange for earning commissions on each trade. Here we analyze the risk profile of a liquidity provider and the so called impermanent (unrealized) loss in particular. We provide an improved version of the commonly denoted impermanent loss function for Uniswap v2 on the semi-infinite domain. The differences between Uniswap v2 and v3 are also discussed.
description: 16 pages, 8 Figures, 1 Table
Tension-free Dirac strings and steered magnetic charges in 3D artificial spin ice
Creators: name: Koraltan, Sabri
name: Slanovc, Florian
name: Bruckner, Florian
name: Nisoli, Cristiano
name: Chumak, Andrii V.
name: Dobrovolskiy, Oleksandr V.
name: Abert, Claas
name: Suess, Dieter
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: 3D nano-architectures present a new paradigm in modern condensed matter physics with numerous applications in photonics, biomedicine, and spintronics. They are promising for the realisation of 3D magnetic nano-networks for ultra-fast and low-energy data storage. Frustration in these systems can lead to magnetic charges or magnetic monopoles, which can function as mobile, binary information carriers. However, Dirac strings in 2D artificial spin ices bind magnetic charges, while 3D dipolar counterparts require cryogenic temperatures for their stability. Here, we present a micromagnetic study of a highly-frustrated 3D artificial spin ice harboring tension-free Dirac strings with unbound magnetic charges at room temperature. We use micromagnetic simulations to demonstrate that the mobility threshold for magnetic charges is by $\SI{2}{eV}$ lower than their unbinding energy. By applying global magnetic fields, we steer magnetic charges in a given direction omitting unintended switchings. The introduced system paves a way towards 3D magnetic networks for data transport and storage
description: 7 pages, 4 figures and 1 table
Thermal stress modelling of diamond on GaN/III-Nitride membranes
Creators: name: Cuenca, Jerome A.
name: Smith, Matthew D.
name: Field, Daniel E.
name: Massabuau, Fabien C-P.
name: Mandal, Soumen
name: Pomeroy, James
name: Wallis, David J.
name: Oliver, Rachel A.
name: Thayne, Iain
name: Kuball, Martin
name: Williams, Oliver A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Diamond heat-spreaders for gallium nitride (GaN) devices currently depend upon a robust wafer bonding process. Bonding-free membrane methods demonstrate potential, however, chemical vapour deposition (CVD) of diamond directly onto a III-nitride (III-N) heterostructure membrane induces significant thermal stresses. In this work, these thermal stresses are investigated using an analytical approach, a numerical model and experimental validation. The thermal stresses are caused by the mismatch in the coefficient of thermal expansion (CTE) between the GaN/III-N stack, silicon (Si) and the diamond from room temperature to CVD growth temperatures. Simplified analytical wafer bow models underestimate the membrane bow for small sizes while numerical models replicate the stresses and bows with increased accuracy using temperature gradients. The largest tensile stress measured using Raman spectroscopy at room temperature was approximately 1.0 $\pm0.2$ GPa while surface profilometry shows membrane bows as large as \SI{58}{\micro\metre}. This large bow is caused by additional stresses from the Si frame in the initial heating phase which are held in place by the diamond and highlights challenges for any device fabrication using contact lithography. However, the bow can be reduced if the membrane is pre-stressed to become flat at CVD temperatures. In this way, a sufficient platform to grow diamond on GaN/III-N structures without wafer bonding can be realised.
Vegetation signature in the observed globally-integrated spectrum of Earth: Modeling the red edge strength using simultaneous cloud data and application for extrasolar planets
Creators: name: Montanes-Rodriguez, Pilar
name: Palle, E.
name: Goode, P. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The vegetation's ``red edge'', an intensity bump in the Earth's spectrum near 700 $nm$ when sunlight is reflected from greenery, is often suggested as a tool in the search for life in terrestrial-like extrasolar planets. Here, through ground-based observations of the Earth's spectrum, satellite observations of clouds, and an advanced atmospheric radiative transfer code, we determine the temporal evolution of the vegetation signature of Earth. The excellent agreement between models and observations motivated us to probe more deeply into the red edge detectability using real cloud observations at longer time scales. Overall, we find the evolution of the red edge signal in the globally-averaged spectra to be weak, and only attributable to vegetation changes when the real land and cloud distributions for the day are known. However, it becomes prominent under certain Sun-Earth-Moon orbital geometries, which are applicable to the search for life in extrasolar planets. Our results indicate that vegetation detection in Earth-like planets will require a considerable level of instrumental precision and will be a difficult task, but not as difficult as the normally weak earthshine signal might seem to suggest.
description: 13 pages, 9 figures, submitted to ApJ
On a Calderon-Zygmund commutator-type estimate
Creators: name: Tarulli, Mirko
name: Wilson, J. Michael
Publisher: name: arXiv
Year: 2007
Subjects: subject: Functional Analysis (math.FA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 42B20; 42B25; 42B35

description: In this paper we extend a Calderon-Zygmund commutator-type estimate. This estimate enables us to prove an embedding result concerning weighted function spaces.
description: 20 pages, no figures
Additional file 1 of Characterization of a bacterial strain Lactobacillus paracasei LP10266 recovered from an endocarditis patient in Shandong, China
Creators: name: Tang, Qi
name: Hao, Yingying
name: Wang, Lu
name: Lu, Chao
name: Li, Ming
name: Si, Zaifeng
name: Wu, Xiaoben
name: Lu, Zhiming
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Supplementary Table 1. Genomic characterization statistics of 63 Lactobacillus species from NCBI.
Σχέσεις συνεργασίας μεταξύ δασκάλων γενικής αγωγής και γονέων μαθητών με ειδικές μαθησιακές δυσκολίες με στόχο την αντιμετώπιση των ψυχοκοινωνικών δυσκολιών των μαθητών
Creators: name: Γούναρη, Σωτηρία-Στυλιανή Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: μαθησιακές δυσκολίες
ψυχοκοινωνικές δυσκολίες
συνεργασία
learning disabilities
psychosocial disabilities
cooperation

description: Η παρούσα εργασία στοχεύει στη διερεύνηση των σχέσεων συνεργασίας δασκάλων γενικής αγωγής και γονέων μαθητών με ειδικές μαθησιακές δυσκολίες με στόχο την αντιμετώπιση των ψυχοκοινωνικών δυσκολιών των μαθητών. Το θεωρητικό μέρος είναι το πρώτο μέρος της εργασίας. Ειδικότερα, το πρώτο κεφάλαιο του θεωρητικού μέρους αναφέρεται στην εννοιολογική αποσαφήνιση των μαθησιακών δυσκολιών, το δεύτερο αναφέρεται στις ψυχοκοινωνικές δυσκολίες των μαθητών με μαθησιακές δυσκολίες, ενώ στο τρίτο περιγράφονται οι μορφές συνεργασίας εκπαιδευτικών και γονέων μαθητών με μαθησιακές δυσκολίες, καθώς και οι δυσκολίες που προκύπτουν. Στο ερευνητικό μέρος της εργασίας περιγράφονται αρχικά ο σκοπός, οι στόχοι και οι υποθέσεις της έρευνας. Ακολουθεί η παρουσίαση του δείγματος και της μεθόδου που χρησιμοποιήθηκε για τη aνάλυση των δεδομένων. Έπεται η ανάλυση των δεδομένων με την ταυτόχρονη παρουσίαση των αποτελεσμάτων της έρευνας. Μετά την ολοκλήρωση του ερευνητικού μέρους ακολουθεί η συζήτηση.
description: The theoretical part is the first part of the master’s thesis. In particular, the first unit refers to the definition of learning disabilities, whereas the second one presents the psychosocial disabilities of children with learning disabilities. In the third unit, both types of cooperation between parents and teachers of children with learning disabilities and its problems are discussed. In the searching part of the master’ s thesis the purpose, the aims and the assumptions of the survey are presented. Then, the sample of the survey and the method that analyzed the data, are described. The analysis of the data follows with the simultaneous presentation of the results. In the end, the discussion of the thesis is presented.
Massive compact disks around FU Orionis-type young eruptive stars revealed by ALMA
Creators: name: Kóspál, Á.
name: de Miera, F. Cruz-Sáenz
name: White, J. A.
name: Ábrahám, P.
name: Chen, L.
name: Csengeri, T.
name: Dong, R.
name: Dunham, M. M.
name: Fehér, O.
name: Green, J. D.
name: Hashimoto, J.
name: Henning, Th.
name: Hogerheijde, M.
name: Kudo, T.
name: Liu, H. B.
name: Takami, M.
name: Vorobyov, E. I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: FU Orionis-type objects (FUors) are low-mass pre-main sequence stars undergoing a temporary, but significant increase of mass accretion rate from the circumstellar disk onto the protostar. It is not yet clear what triggers the accretion bursts and whether the disks of FUors are in any way different from disks of non-bursting young stellar objects. Motivated by this, we conducted a 1.3 mm continuum survey of ten FUors and FUor-like objects with ALMA, using both the 7 m array and the 12 m array in two different configurations to recover emission at the widest possible range of spatial scales. We detected all targeted sources and several nearby objects as well. To constrain the disk structure, we fit the data with models of increasing complexity from 2D Gaussian to radiative transfer, enabling comparison with other samples modeled in a similar way. The radiative transfer modeling gives disk masses that are significantly larger than what is obtained from the measured millimeter fluxes assuming optically thin emission, suggesting that the FUor disks are optically thick at this wavelength. In comparison with samples of regular Class II and Class I objects, the disks of FUors are typically a factor of 2.9-4.4 more massive and a factor of 1.5-4.7 smaller in size. A significant fraction of them (65-70%) may be gravitationally unstable.
description: 34 pages, 8 tables, 29 figures, accepted for publication in the Astrophysical Journal Supplement Series
The ArDM project: a Liquid Argon TPC for Dark Matter Detection
Creators: name: Laffranchi, M.
name: Rubbia, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: WIMPs (Weakly Interacting Massive Particles) are considered the main candidates for Cold Dark Matter. The ArDM experiment aims at measuring signals directly induced by WIMPs in liquid argon. A 1-ton prototype is currently developed with the goal of demonstrating the feasibility and performance of a detector with such a large target mass. ArDM aims at acting as a liquid argon TPC and additionally measuring the scintillation light. The principle of the experiment and the conceptual design of the detector are described.
description: 4 pages, 1 figure, Invited talk at the Third Symposium On Large TPCs For Low Energy Rare Event Detection, 11 - 12 December 2006, Paris (France)
Progressive Class-based Expansion Learning For Image Classification
Creators: name: Wang, Hui
name: Zhao, Hanbin
name: Li, Xi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this paper, we propose a novel image process scheme called class-based expansion learning for image classification, which aims at improving the supervision-stimulation frequency for the samples of the confusing classes. Class-based expansion learning takes a bottom-up growing strategy in a class-based expansion optimization fashion, which pays more attention to the quality of learning the fine-grained classification boundaries for the preferentially selected classes. Besides, we develop a class confusion criterion to select the confusing class preferentially for training. In this way, the classification boundaries of the confusing classes are frequently stimulated, resulting in a fine-grained form. Experimental results demonstrate the effectiveness of the proposed scheme on several benchmarks.
description: Accepted to Journal of IEEE Signal Processing Letters
A symbolic SAT-based algorithm for almost-sure reachability with small strategies in POMDPs
Creators: name: Chatterjee, Krishnendu
name: Chmelik, Martin
name: Davies, Jessica
Publisher: name: IST Austria
Year: 2015
Subjects: 000 Computer science, knowledge & general works

description: POMDPs are standard models for probabilistic planning problems, where an agent interacts with an uncertain environment. We study the problem of almost-sure reachability, where given a set of target states, the question is to decide whether there is a policy to ensure that the target set is reached with probability 1 (almost-surely). While in general the problem is EXPTIME-complete, in many practical cases policies with a small amount of memory suffice. Moreover, the existing solution to the problem is explicit, which first requires to construct explicitly an exponential reduction to a belief-support MDP. In this work, we first study the existence of observation-stationary strategies, which is NP-complete, and then small-memory strategies. We present a symbolic algorithm by an efficient encoding to SAT and using a SAT solver for the problem. We report experimental results demonstrating the scalability of our symbolic (SAT-based) approach.
Maximizing Marginal Fairness for Dynamic Learning to Rank
Creators: name: Yang, Tao
name: Ai, Qingyao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences
subject: H.3.3

description: Rankings, especially those in search and recommendation systems, often determine how people access information and how information is exposed to people. Therefore, how to balance the relevance and fairness of information exposure is considered as one of the key problems for modern IR systems. As conventional ranking frameworks that myopically sorts documents with their relevance will inevitably introduce unfair result exposure, recent studies on ranking fairness mostly focus on dynamic ranking paradigms where result rankings can be adapted in real-time to support fairness in groups (i.e., races, genders, etc.). Existing studies on fairness in dynamic learning to rank, however, often achieve the overall fairness of document exposure in ranked lists by significantly sacrificing the performance of result relevance and fairness on the top results. To address this problem, we propose a fair and unbiased ranking method named Maximal Marginal Fairness (MMF). The algorithm integrates unbiased estimators for both relevance and merit-based fairness while providing an explicit controller that balances the selection of documents to maximize the marginal relevance and fairness in top-k results. Theoretical and empirical analysis shows that, with small compromises on long list fairness, our method achieves superior efficiency and effectiveness comparing to the state-of-the-art algorithms in both relevance and fairness for top-k rankings.
description: 10 pages, 7 figures
SSHOC D4.1 A sample management system for cross- national web survey
Creators: name: Fitzgerald, Rory
name: Bottoni, Gianmaria
name: Jessop, Curtis
name: Straume, Øyvind
name: Agren, Quentin
name: Michaud, Geneviève
name: Sauger, Nicolas
Publisher: name: Zenodo
Year: 2019
Subjects: SSHOC
Social Sciences and Humanities Open Cloud
European Open Science Cloud
EOSC
Interoperability
metadata interoperability
data interoperability
FAIR principles
metadata standards

description: The European Social Survey ERIC (ESS) experimented with the world’s first cross-national probability-based online panel, named CRONOS, recruited off the back of ESS Round 8. One of the biggest challenges of the project was the coordination and harmonised management of the sample in the three different European countries taking part in the project (Estonia, Slovenia and Great Britain. In particular, the need to restrict and enable access to panellists’ information for subsets of the staff whilst also facilitating the correct level of access at the central level was identified as a challenge. Currently, there is no “off-the-shelf” commercial software that is flexible enough to manage the complexity of a cross-national sample. For this reason, ESS ERIC in collaboration with Sciences Po decided to develop a sample management system (abbreviation SMS) capable of dealing with the complexity highlighted above as part of the SSHOC project. This document describes the technical specification of a sample management system for cross-national purposes, outlining the main functionalities of the system and describing the user roles related to access rights to panellists’ contact information.
description: This deliverable has been accepted by the European Commission on - 03 November 2020
The dependence of Star Formation on Galaxy Stellar Mass
Creators: name: Zheng, Xian Zhong
name: Bell, Eric F.
name: Papovich, Casey
name: Wolf, Christian
name: Meisenheimer, Klaus
name: Rix, Hans-Walter
name: Rieke, George H.
name: Somerville, Rachel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We combine Spitzer 24micron observations with data from the COMBO-17 survey for ~15,000 0.2 we consider both the ultraviolet (UV) and the infrared (IR) luminosities, and account for the contributions of galaxies that are individually undetected at 24micron through image stacking. For all redshifts we find that higher-mass galaxies have substantially lower specific SFR, /, than lower-mass ones. However, we find the striking result that the rate of decline in cosmic SFR with redshift is nearly the same for massive and low-mass galaxies, i.e. NOT a strong function of stellar mass. This analysis confirms one version of what has been referred to as `downsizing', namely that the epoch of major mass build-up in massive galaxies is substantially earlier than the epoch of mass build-up in low-mass galaxies. Yet it shows that star formation activity is NOT becoming increasingly limited to low-mass galaxies towards the present epoch. We argue that this suggests that heating by AGN-powered radio jets is not the dominant mechanism responsible for the decline in cosmic SFR since z~1, which is borne out by comparison with semi-analytic models that include this effect.
description: 5 pages, 2 figures, accepted by ApJL; minor corrections are included
Additional file 2 of Prevalence, characteristics, and respiratory arousal threshold of positional obstructive sleep apnea in China: a large scale study from Shanghai Sleep Health Study cohort
Creators: name: Huang, Weijun
name: Wang, Xiaoting
name: Xu, Chong
name: Xu, Huajun
name: Zhu, Huaming
name: Liu, Suru
name: Zou, Jianyin
name: Guan, Jian
name: Yi, Hongliang
name: Yin, Shankai
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 2: Table S1. Clinical and Sleep Characteristics of All Subjects (n = 7110).
On well-posedness of the Cauchy problem for MHD system in Besov spaces
Creators: name: Miao, Changxing
name: Yuan, Baoquan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 76W05, 74H20

description: This paper is devoted to the study of the Cauchy problem of incompressible magneto-hydrodynamics system in framework of Besov spaces. In the case of spatial dimension $n\ge 3$ we establish the global well-posedness of the Cauchy problem of incompressible magneto-hydrodynamics system for small data and the local one for large data in Besov space $\dot{B}^{\frac np-1}_{p,r}(\mr^n)$, $1\le p1$. In case of $n=2$, we establish the global well-posedness of solutions for large initial data in homogeneous Besov space $\dot{B}^{\frac2p-1}_{p,r}(\mr^2)$ for $2< p
description: 23pages
Universality of the single-particle spectra of cuprate superconductors
Creators: name: Zhu, Lijun
name: Aji, Vivek
name: Shekhter, Arkady
name: Varma, C. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: All the available data for the dispersion and linewidth of the single-particle spectra above the superconducting gap and the pseudogap in metallic cuprates for any doping has universal features. The linewidth is linear in energy below a scale $ω_c$ and constant above. The cusp in the linewidth at $ω_c$ mandates, due to causality, a "waterfall", i.e., a vertical feature in the dispersion. These features are predicted by a recent microscopic theory. We find that all data can be quantitatively fitted by the theory with a coupling constant $λ_0$ and an upper cutoff at $ω_c$ which vary by less than 50% among the different cuprates and for varying dopings. The microscopic theory also gives these values to within factors of O(2).
description: 4 pages, 4 figures; accepted by Phys. Rev. Lett
Σχολιασμένη Διερμηνεία
Creators: name: Μαντά, Ευγενία Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: ΔΠΜΣ Διερμηνείας
σχολιασμένη διερμηνεία
διερμηνεία συνεδρίων
Joint Postgraduate Programme in Conference Interpreting and Translation
Report on Conference Interpreting
Conference Interpreting

description: Η παρούσα εργασία αποτελεί καταγραφή και σχολιασμό της εμπειρίας της συντάκτριας στο πλαίσιο της υποχρεωτικής πρακτικής άσκησης διερμηνείας σε πραγματικές συνθήκες που έγινε κατά το τελευταίο έτος φοίτησης στο Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών Μετάφρασης και Διερμηνείας με ειδίκευση τη Διερμηνεία. Στις ενότητες που ακολουθούν περιγράφονται οι εμπειρίες από τα συνέδρια και τις εκδηλώσεις, όπου έγινε διερμηνεία. Δίνονται στοιχεία για τους ομιλητές, κάποια ενδεικτικά γλωσσάρια με όρους και φράσεις που χρησιμοποιήθηκαν, περιγράφεται ο τρόπος προετοιμασίας και αναλύονται οι δυσκολίες και τα προβλήματα, τα οποία αντιμετωπίστηκαν, καθώς και οι στρατηγικές τεχνικές διαχείρισής τους.
description: This paper is a documentation and a commentary on the experiences the author had as an interpreter during interpreting practice in real circumstances, which is a compulsory part of the Interdisciplinary Masters Programme in Interpreting, organised by Aristotle University of Thessaloniki. What follows is a detailed account of the interpretation provided at conferences/events with a thorough description of the difficulties the interpreter faced and the managing and problem-solving techniques and strategies implemented by the interpreter in order to overcome these obstacles and produce a successful interpreting result. This presentation is complemented with information about the speakers and their speeches, as well as vocabulary tables of the terminology used.
Rare top quark decays in extended models
Creators: name: Gaitan, R.
name: Miranda, O. G.
name: Cabral-Rosetti, L. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Flavor changing neutral currents (FCNC) decays t to H + c, t to Z + c, and H to t + bar{c} are discussed in the context of Alternative Left-Right symmetric Models (ALRM) with extra isosinglet heavy fermions where FCNC decays may take place at tree-level and are only suppressed by the mixing between ordinary top and charm quarks, which is poorly constraint by current experimental values. The non-manifest case is also briefly discussed.
description: Contributed talk given at the 10th Mexican Workhop on Particles and Fields, Morelia, Michoacan, Mexico, 7-12 Nov 2005
Plasmonic Waveguides from Coulomb-Engineered Two-Dimensional Metals
Creators: name: Jiang, Zhihao
name: Haas, Stephan
name: Rösner, Malte
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Coulomb interactions play an essential role in atomically-thin materials. On one hand, they are strong and long-ranged in layered systems due to the lack of environmental screening. On the other hand, they can be efficiently tuned by means of surrounding dielectric materials. Thus all physical properties which decisively depend on the exact structure of the electronic interactions can be in principle efficiently controlled and manipulated from the outside via Coulomb engineering. Here, we show how this concept can be used to create fundamentally new plasmonic waveguides in metallic layered materials. We discuss in detail how dielectrically structured environments can be utilized to non-invasively confine plasmonic excitations in an otherwise homogeneous metallic 2D system by modification of its many-body interactions. We define optimal energy ranges for this mechanism and demonstrate plasmonic confinement within several nanometers. In contrast to conventional functionalization mechanisms, this scheme relies on a purely many-body concept and does not involve any direct modifications to the active material itself.
Differential Area Analysis for Ransomware Attack Detection within Mixed File Datasets
Creators: name: Davies, Simon R
name: Macfarlane, Richard
name: Buchanan, William J
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: The threat from ransomware continues to grow both in the number of affected victims as well as the cost incurred by the people and organisations impacted in a successful attack. In the majority of cases, once a victim has been attacked there remain only two courses of action open to them; either pay the ransom or lose their data. One common behaviour shared between all crypto ransomware strains is that at some point during their execution they will attempt to encrypt the users' files. Previous research Penrose et al. (2013); Zhao et al. (2011) has highlighted the difficulty in differentiating between compressed and encrypted files using Shannon entropy as both file types exhibit similar values. One of the experiments described in this paper shows a unique characteristic for the Shannon entropy of encrypted file header fragments. This characteristic was used to differentiate between encrypted files and other high entropy files such as archives. This discovery was leveraged in the development of a file classification model that used the differential area between the entropy curve of a file under analysis and one generated from random data. When comparing the entropy plot values of a file under analysis against one generated by a file containing purely random numbers, the greater the correlation of the plots is, the higher the confidence that the file under analysis contains encrypted data.
Full superconducting gap and type-I to type-II superconductivity transition in single crystalline NbGe2
Creators: name: Zhang, Dongting
name: Le, Tian
name: Lv, Baijing
name: Yin, Lichang
name: Chen, Chufan
name: Nie, Zhiyong
name: Su, Dajun
name: Yuan, Huiqiu
name: Xu, Zhu-An
name: Lu, Xin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report a mechanical point-contact spectroscopy study on the single crystalline NbGe$_2$ with a superconducting transition temperature $T\rm_c$ = 2.0 - 2.1 K. The differential conductance curves at 0.3 K can be well fitted by a single gap s-wave Blonder-Tinkham-Klapwijk model and the temperature dependent gap follows a standard Bardeen-Cooper-Schrieffer behavior, yielding $Δ_0 \sim$ 0.32 meV and 2$Δ_0$/$k\rm_{B}$$T\rm_{c}$ = 3.62 in the weak coupling limit. In magnetic field, the superconducting gap at 0.3 K keeps constant up to $H_{c1}\sim$150 Oe and gradually decreases until $H_{c2}\sim$350 Oe, indicating NbGe$_2$ going through a transition from type-I to type-II (possible type-II/1) superconductor at low temperature.
description: 6 pages and 4 figures