cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ειδικά σμήνη ευθειών στον τρισδιάστατο ευκλείδειο χώρο
Creators: name: Κατίδου, Ευφροσύνη Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Σμήνος
Ειδικά σμήνη
Ευθεία
Ενειλιγμένη
line congruence
line
pseudospherical
Weingarten
Wayles

description: Η παρούσα διπλωματική εργασία επικεντρώνεται στη μελέτη των ιδιοτήτων κάποιων ειδικών σμηνών ευθειών με τη χρήση της θεωρίας των διαφορικών μορφών. Αποτελείται από δύο ενότητες. Στην πρώτη ενότητα γίνεται η πρώτη επαφή του αναγνώστη με την ορισμό του σμήνους, τις βασικές έννοιες που σχετίζονται με αυτό και εισάγονται τα απαραίτητα εργαλεία για την ανάπτυξη του επόμενου κεφαλαίου. Στο δεύτερο κεφάλαιο γίνεται αναφορά σε κάποιες ειδικές κατηγορίες σμηνών με ενδιαφέρουσες ιδιότητες. Αφετηρία αυτού του κεφαλαίου αποτελούν τα καθετικά και τα ισότροπα σμήνη. Έπειτα, αναπτύσσεται μια συνοπτική μελέτη της ειδικής κατηγορίας των M-σμηνών. Συμπεριλαμβάνονται, ακόμα, τα σμήνη του Waelsch, τα οποία αποτέλεσαν την αφορμή ώστε να μελετηθεί η κατηγορία των σμηνών που έχουν την ιδιότητα οι καμπυλότητες των εστιακών επιφανειών τους να σχετίζονται. Τέτοια είναι τα Weingarten σμήνη, κάποιες ιδιότητες των οποίων αναφέρονται στην παρούσα εργασία. Το εύρος της θεωρίας των W-σμηνών είναι μεγάλο, ωστόσο, εδώ γίνεται αναφορά στην ειδικότερη κατηγορία αυτών, τα ψευδοσφαιρικά σμήνη. Τέλος, εισάγεται η έννοια του ζεύγους ορθογώνιων σμηνών και παρουσιάζονται τα κυριότερα θεωρήματα που αφορούν σε αυτό
description: This master thesis focuses on the properties of special cases of line congruences by using the theory of differential forms. It consists of two sections. In the first section we define the line congruence and we introduce the reader to the basic related terms, which are necessary for the rest of the text. Τhe second section is devoted to some special cases of line congruences equipped with interesting geometric results. In the beginning, we study the normal and the isotropic line congruences. Furthermore, we investigate the M-line congruences. Moreover, among others, we prove some geometric results for some line congruences which are equipped with the property that the curvatures of their focals are related, specifically Wayles, Weingarten and pseudospherical line congruences. The final case of this section is the pair of orthogonal line congruences
GSKY - a scalable geospatial data server
Creators: name: Evans, Ben
Publisher: name: Zenodo
Year: 2019

description: For researchers analysing, transforming, and integrating large geospatial datasets, the traditional approach has been to either download a relevant part of data and analyse these data subsets in an ad-hoc manner, or to requires skill in batch processing large numbers of files for further analysis. For many of our national datasets this has become infeasible due to the volume of storage space and the work needed to wrangle data at this scale. However, recent developments in significant data repositories with integrated data processing infrastructure opens the door for new ways of processing data on demand. NCI has developed a scalable geospatial data server called GSKY, which provides a new capability for high performance data analysis. GSKY is currently being used in some national and international initiatives – providing fast access to programs and tools over the network, and allowing researchers to analyse NCI’s multi-petabyte nationally significant research data collections: from satellite data products, climate and weather simulations, and rich geophysics data. GSKY supports on demand processing of data that provides interactive data exploration presented as an OGC standards-compliant services – Web Map Services (WMS), Web Processing Services (WPS) and Web Coverage Services (WCS). GSKY dynamically and efficiently distributes the requisite computations among computational nodes and thus provides a scalable analysis framework to provide high performance real-time access to these petabyte size datasets. GSKY represents a new class of intelligent data services, that provides a new research capability by utilising the power real-time high performance services and big data.
Hardware-implemented κρυπτογραφικοί αλγόριθμοι, ανάλυση λειτουργίας των FPGA και εφαρμογή κρυτπογραφικού αλγορίθμου hummingbird σε FPGA SPARTAN 6 SP605
Creators: name: Γαβριηλίδης, Νικόλαος Παύλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: FPGA
SPARTAN 6 SP605
Hummingbird algorithm
ISE Xilinx

description: Οι κρυπτογραφικοί αλγόριθμοι, όπως και οι περισσότεροι αγλόριθμοι, μπορούν να εφαρμοστούν σε επίπεδο τόσο λογισμικού όσο και υλικού. Πολλές φορές εφαρμογές με υψηλές υπολογιστικές απαιτήσεις και υψηλές απαιτήσεις ασφάλειας, δεν μπορούν να καλυφθούν στο επίπεδο του λογισμικού, γι αυτό κατασκευάζονται απευθείας στο υλικό. Το υλικό που μπορεί να χρησιμοποιηθεί είναι το application-specific integrated circuit (ASIC) ή το field programmable gate array (FPGA). Σκοπός της παρούσας διπλωματικής είναι να παρουσιάσει τις βασικές διαφορές εφαρμογής των αλγορίθμων σε λογισμικό και υλικό. Επίσης, θα παρουσιαστούν τα απαραίτητα βήματα, ώστε ο κρυπτογραφικός αλγόριθμος Hummingbird, να δύναται να εφαρμοστεί στο FPGA SPARTAN 6 SP605, και εν τέλει να εφαρμοστεί σε αυτό
description: Cryptographic algorithms, like most of the algorithms, can be applied at both software and hardware level. Many applications with high computing and security requirements, can not be covered at the software level, so they are directly manufactured in the hardware. The hardware used is application-specific integrated circuit (ASIC) or the field programmable gate array (FPGA). The aim of this diploma thesis is to present the basic differences in the application of algorithms in both software and hardware level. Also, the necessary steps will be presented, so that the Hummingbird cryptographic algorithm, will be able to be applied to the FPGA SPARTAN 6 SP605, and ultimately applied to it
Demographic and Clinical Factors Associated With SARS-CoV-2 Spike 1 Antibody Response Among Vaccinated US Adults: the C4R Study
Creators: name: Wenzel, Sally E.
name: Anderson, Michaela R.
name: Kim, John S.
name: Tracy, Russell P.
name: Regan, Elizabeth A.
name: Woodruff, Prescott
name: Styer, Linda M.
name: Howard, Virginia J.
name: Balte, Pallavi
name: Parker, Monica M.
name: Bowler, Russell P.
name: Bell, Taison D.
name: Schwartz, David A.
name: Elkind, Mitchell S. V.
name: Lee, Joyce S.
name: Coresh, Josef
name: Schreiner, Pamela J.
name: Oelsner, Elizabeth C.
name: Make, Barry J.
name: Boyle, Rebekah
name: Demmer, Ryan T.
name: Mantis, Nicholas J.
name: Allen, Norrina B.
name: Doyle, Margaret F.
name: Cushman, Mary
name: Ortega, Victor E.
name: Kanaya, Alka M.
name: Xanthakis, Vanessa
name: Sun, Yifei
name: Henderson, Joel M.
name: Raffield, Laura M.
name: Isasi, Carmen R.
name: Cole, Shelley A.
Publisher: name: Springer Nature
Year: 2024

description: This study investigates correlates of anti-S1 antibody response following COVID-19 vaccination in a U.S. population-based meta-cohort of adults participating in longstanding NIH-funded cohort studies. Anti-S1 antibodies were measured from dried blood spots collected between February 2021-August 2022 using Luminex-based microsphere immunoassays. Of 6245 participants, mean age was 73 years (range, 21-100), 58% were female, and 76% were non-Hispanic White. Nearly 52% of participants received the BNT162b2 vaccine and 48% received the mRNA-1273 vaccine. Lower anti-S1 antibody levels are associated with age of 65 years or older, male sex, higher body mass index, smoking, diabetes, COPD and receipt of BNT16b2 vaccine (vs mRNA-1273). Participants with a prior infection, particularly those with a history of hospitalized illness, have higher anti-S1 antibody levels. These results suggest that adults with certain socio-demographic and clinical characteristics may have less robust antibody responses to COVID-19 vaccination and could be prioritized for more frequent re-vaccination.
Liouville geometry of classical thermodynamics
Creators: name: van der Schaft, Arjan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In the contact-geometric formulation of classical thermodynamics distinction is made between the energy and entropy representation, which can be resolved by taking homogeneous coordinates for the intensive variables. This results in a geometric formulation on the cotangent bundle of the manifold of extensive variables, where all geometric objects are homogeneous in the cotangent variables. The resulting geometry is studied in-depth. Additional homogeneity with respect to the extensive variables, corresponding to the classical Gibbs-Duhem relation, is treated within the same geometric framework.
description: 27 pages
Spitzer spectroscopy of carbon stars in the Small Magellanic Cloud
Creators: name: Lagadec, Eric
name: Zijlstra, Albert A.
name: Sloan, G. C.
name: Matsuura, Mikako
name: Wood, Peter
name: Harris, G. J.
name: van Loon, Jacco Th.
name: Blommaert, J. A. D. L.
name: Hony, S.
name: Groenewegen, M. A. T.
name: Feast, M. W.
name: Whitelock, P. A.
name: Menzies, J. W.
name: Cioni, M. -R.
name: Waters, L. B. F. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present Spitzer Space telescope spectroscopic observations of 14 carbon-rich AGB stars in the Small Magellanic Cloud. SiC dust is seen in most of the carbon-rich stars but it is weak compared to LMC stars. The SiC feature is strong only for stars with significant dust excess, opposite to what is observed for Galactic stars. We argue that in the SMC, SiC forms at lower temperature than graphite dust, whereas the reverse situation occurs in the Galaxy where SiC condenses at higher temperatures and forms first. Dust input into the interstellar medium by AGB stars consists mostly of carbonaceous dust, with little SiC or silicate dust. Only the two coolest stars show a 30-micron band due to MgS dust. We suggest that this is due to the fact that, in the SMC, mass-losing AGB stars generally have low circumstellar (dust) optical depth and therefore effective heating of dust by the central star does not allow temperatures below the 650 K necessary for MgS to exist as a solid. Gas phase C$_2$H$_2$ bands are stronger in the SMC than in the LMC or Galaxy. This is attributed to an increasing C/O ratio at low metallicity. We present a colour-colour diagram based on Spitzer IRAC and MIPS colours to discriminate between O- and C-rich stars. We show that AGB stars in the SMC become carbon stars early in the thermal-pulsing AGB evolution, and remain optically visible for $\sim 6 \times 10^5$ yr. For the LMC, this lifetime is $\sim 3 \times 10^5$ yr. The superwind phase traced with Spitzer lasts for $\sim 10^4$ yr. Spitzer spectra of a K supergiant and a compact HII region are also given.
description: 17 pages, 17 figures
Capítulo XIX – Las medidas antiabuso en el ámbito de la Unión Europea
Creators: name: Roch, María Teresa Soler
Publisher: name: Scuola Europea di Alti Studi Tributari, Alma Mater Studiorum - Università di Bologna
Year: 2010

description: Studi Tributari Europei, 2010: Finanziamento alle imprese e neutralità fiscale
Epsilon-Near-Zero (ENZ) Metamaterials and Electromagnetic Sources: Tailoring the Radiation Phase Pattern
Creators: name: Alu, Andrea
name: Silveirinha, Mario
name: Salandrino, Alessandro
name: Engheta, Nader
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this work, we investigate the response of epsilon-near-zero (ENZ) metamaterials and plasmonic materials to electromagnetic source excitation. The use of these media for tailoring the phase of radiation pattern of arbitrary sources is proposed and analyzed numerically and analytically for some canonical geometries. In particular, the possibility of employing planar layers, cylindrical shells or other more complex shapes made of such materials in order to isolate two regions of space and to tailor the phase pattern in one region, fairly independent of the excitation shape present in the other, is demonstrated with theoretical arguments and some numerical examples. Physical insights into the phenomenon are also presented and discussed together with potential applications of the phenomenon.
description: 37 pages, 24 figures
Capítulo XX – Tendencias del Tribunal de Justicia de las Comunidades Europeas en materia de imposición directa
Creators: name: Molina, Pedro Herrera
Publisher: name: Scuola Europea di Alti Studi Tributari, Alma Mater Studiorum - Università di Bologna
Year: 2010

description: Studi Tributari Europei, 2010: Finanziamento alle imprese e neutralità fiscale
Capítulo XXI – La protección de los derechos fundamentales en Europa. Incidencia del Convenio Europeo de Derechos Humanos y de la jurisprudencia de Estrasburgo y de Luxemburgo
Creators: name: Galiardo, Antonio Cayón
Publisher: name: Scuola Europea di Alti Studi Tributari, Alma Mater Studiorum - Università di Bologna
Year: 2010

description: Studi Tributari Europei, 2010: Finanziamento alle imprese e neutralità fiscale
Multiplying Matrices Without Multiplying
Creators: name: Blalock, Davis
name: Guttag, John
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Hardware Architecture (cs.AR)
subject: Performance (cs.PF)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Multiplying matrices is among the most fundamental and compute-intensive operations in machine learning. Consequently, there has been significant work on efficiently approximating matrix multiplies. We introduce a learning-based algorithm for this task that greatly outperforms existing methods. Experiments using hundreds of matrices from diverse domains show that it often runs $100\times$ faster than exact matrix products and $10\times$ faster than current approximate methods. In the common case that one matrix is known ahead of time, our method also has the interesting property that it requires zero multiply-adds. These results suggest that a mixture of hashing, averaging, and byte shuffling$-$the core operations of our method$-$could be a more promising building block for machine learning than the sparsified, factorized, and/or scalar quantized matrix products that have recently been the focus of substantial research and hardware investment.
description: To appear at ICML 2021
The effects of environment on morphological evolution between 0
Creators: name: Capak, P. L.
name: Abraham, R. G.
name: Ellis, R. S.
name: Mobasher, B.
name: Scoville, N. Z.
name: Sheth, K.
name: Koekemoer, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We explore the evolution of the morphology density relation using the COSMOS-ACS survey and previous cluster studies. The Gini parameter measured in a Petrosian aperture is found to be an effective way of selecting early-type galaxies free from systematic effects with redshift. We find galaxies are transformed from late (spiral and irregular) to early (E+S0) type galaxies more rapidly in dense than sparse regions. At a given density, the early-type fraction grows constantly with cosmic time, but the growth rate increases with density as a power law of index $0.29\pm0.02$. However, at densities below 100 galaxies per Mpc$^{2}$ no evolution is found at $z>0.4$. In contrast the star-formation-density relation shows strong evolution at all densities and redshifts, suggesting different physical mechanisms are responsible for the morphological and star formation transformation. We show photometric redshifts can measure local galaxy environment, but the present results are limited by photometric redshift error to densities above $Σ=3$ galaxies per Mpc$^{2}$.
description: 12 pages, 13 figures, to appear in the COSMOS special issue of the ApJS
Session-aware Linear Item-Item Models for Session-based Recommendation
Creators: name: Choi, Minjin
name: Kim, jinhong
name: Lee, Joonseok
name: Shim, Hyunjung
name: Lee, Jongwuk
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Session-based recommendation aims at predicting the next item given a sequence of previous items consumed in the session, e.g., on e-commerce or multimedia streaming services. Specifically, session data exhibits some unique characteristics, i.e., session consistency and sequential dependency over items within the session, repeated item consumption, and session timeliness. In this paper, we propose simple-yet-effective linear models for considering the holistic aspects of the sessions. The comprehensive nature of our models helps improve the quality of session-based recommendation. More importantly, it provides a generalized framework for reflecting different perspectives of session data. Furthermore, since our models can be solved by closed-form solutions, they are highly scalable. Experimental results demonstrate that the proposed linear models show competitive or state-of-the-art performance in various metrics on several real-world datasets.
description: In Proceedings of the Web Conference 2021. 12 pages
Τα νέα μέσα στην διάθεση της εκπαίδευσης
Creators: name: Τζιώνα, Αλεξία Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ψηφιακός εγγραματισμός
Web 2.0
Εκπαίδευση
Συνεργατική μάθηση
SOLE
Digital literacy
Education

description: Η εκπαίδευση στον 21ο αιώνα καλείται να προετοιμάσει τους μαθητές κατάλληλα ώστε να μπορέσουν να συμμετέχουν με επιτυχία στην κοινωνία της πληροφορίας. Το web 2.0 δημιουργεί πλέον νέες συνθήκες στη διαδικασία της μάθησης. Η ανάδυση ενός νέου ψηφιακού κόσμου έχει δημιουργήσει καινούριες δυνατότητες μάθησης οι οποίες όπως παρουσιάζονται στο θεωρητικό μέρος της εργασίας ενισχύουν μια σειρά από πολυμεσικές ικανότητες του μαθητή και παράλληλα αναπτύσσουν κοινωνικές δεξιότητες και συνεργατικές αξίες. Στόχος της έρευνας είναι να εξετάσουμε αν μπορούν οι μαθητές κατά την διδασκαλία με την χρήση εργαλείων web 2.0 και τη συνεργατική μάθηση να εμπλουτίσουν τις γνώσεις τους. Συγκεκριμένα εξετάζεται η στάση και η άποψη των μαθητών που συμμετέχουν σε αυτοδιαχειριζόμενα εκπαιδευτικά περιβάλλοντα (SOLE) κάνοντας χρήση την πλατφόρμα «Σχολείο στο Σύννεφο» Η συγκεκριμένη μέθοδος εφαρμόστηκε πειραματικά από τον εμπνευστή της Sugata Mitra σε απομακρυσμένες περιοχές της Ινδίας. Στην Ελλάδα οι μαθητές στην συντριπτικοί τους πλειοψηφία ήταν θετικοί στην χρήση της πλατφόρμας «Σχολείο στο Σύννεφο» καθώς αύξησαν τις γνώσεις τους μέσα σε ένα δημιουργικό περιβάλλον ενισχύοντας παράλληλα τον ψηφιακό εγγραματισμό.
description: Education in the 21st century prepares pupils adequately in order to enable them to participate successfully in the information society.Web 2.0 now creates new conditions in the learning process. The emergence of a new digital world has created new learning opportunities that are presented on the theoretical part of the master thesis like enhancing a range of multimedia capabilities and also developing social skills and cooperative values. The aim of the research is to examine if students enrich their knowledge when teaching using Web 2.0 tools and collaborative learning. Specifically it measures the attitude and opinion of students participating in self-organized learning environments (SOLE) using the platform "School in the Cloud". This process piloted by its initiator Sugata Mitra in remote areas of India. The students in Greece were positive to the use of the platform 'School in the Cloud" while increasing their knowledge in a creative environment and enhancing the digital literacy.
WAMS-Based Model-Free Wide-Area Damping Control by Voltage Source Converters
Creators: name: Guo, Jinpeng
name: Zenelis, Ilias
name: Wang, Xiaozhe
name: Ooi, Boon-Teck
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, a novel model-free wide-area damping control (WADC) method is proposed, which can achieve full decoupling of modes and damp multiple critical inter-area oscillations simultaneously using grid-connected voltage source converters (VSCs). The proposed method is purely measurement based and requires no knowledge of the network topology and the dynamic model parameters. Hence, the designed controller using VSCs can update the control signals online as the system operating condition varies. Numerical studies in the modified IEEE 68-bus system with grid-connected VSCs show that the proposed method can estimate the system dynamic model accurately and can damp inter-area oscillations effectively under different working conditions and network topologies.
Μεταμοσχεύσεις: αποκλειστικά ιατρική ευθύνη ή φαινόμενο και με ηθικές διαστάσεις;
Creators: name: Σκάλκου, Αναστασία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Μεταμόσχευση οργάνου
Ιστορία - Θρησκεία
Ηθική - Νομοθεσία
Organ transplant
History - Religion
Ethics - Legislation

description: Σκοπός της διατριβής ήταν η αναδρομή και η εξέλιξη των μεταμοσχεύσεων στο πέρασμα των χρόνων. Εξετάσαμε την ορολογία σχετικά με τις μεταμοσχεύσεις. Στη συνέχεια παρουσιάσαμε αναλυτικά την ιστορία των μεταμοσχεύσεων από την αρχαιότητα έως τη σημερινή εποχή τόσο στην Ελλάδα όσο και σε ολόκληρο τον κόσμο. Ακόμη αναφερθήκαμε στον τρόπο με τον οποίο έχει αντιμετωπιστεί η ιατρική αυτή πράξη από κάθε θρησκεία. Ένα άλλο θέμα που θίξαμε ήταν οι ηθικοί προβληματισμοί που προκύπτουν σχετικά με το φαινόμενο της μεταμόσχευσης οργάνων και διαπιστώσαμε πόσο σημαντική είναι η ύπαρξη νομικού πλαισίου ώστε να προστατεύεται η διαδικασία αυτή, ενώ αναλύσαμε ταυτόχρονα τα ήδη υπάρχοντα νομικά πλαίσια σε Ελλάδα και Ευρώπη.
description: The aim of the present thesis was a historic throwback and a reference in the evolution of organ transplant. We examined the proposed terminology and the definitions given for organ transplant. Then we presented the historic stages of organ transplant from ancient times until nowadays. Furthermore, we presented the way this phenomenon is managed by different religions. We also examined the ethical problems deriving from organ transplant and we highlighted the importance of a legislation concerning organ transplant, in order to protect this phenomenon.
Grammatical elicitation: Past tense and subject relative clauses
Creators: name: Sales, Henry
name: Scott, Tessa
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: mam

description: Includes the verb 'arrive' in main and subordinate clauses; subject of transitive verb (ergative) relative clauses with variation of word order and focus (answers to information questions, etc). For notes, see PDF pages 28-31 of related field notes.
Grammatical elicitation: Alignment and agreement
Creators: name: Sales, Henry
name: Bertet, Denis
name: Michael, Lev
name: Scott, Tessa
name: Wilbanks, Eric
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: mam

description: Elicitation of various person/number verbal paradigms, with a focus on the constraints on the alternation between ching and chi. Lead elicitor: Lev Michael. Clean copy: Eric Wilbanks.
Η μετάφραση του χιούμορ στις τηλεοπτικές σειρές: η περίπτωση του How I met your mother
Creators: name: Ταμία, Μαρία-Νεφέλη
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Xιούμορ
Yποτιτλισμός
Mεταφραστικές στρατηγικές
Humour
Subtitling
Translation strategies

description: Κύριος στόχος της παρούσας μεταπτυχιακής εργασίας είναι η διερεύνηση του τρόπου με τον οποίο μεταφράζονται τα χιουμοριστικά στοιχεία στον υποτιτλισμό των τηλεοπτικών σειρών, μιας και είναι κοινά αποδεκτό ότι το χιούμορ συχνά δημιουργεί αμηχανία στους μεταφραστές λόγω της ιδιαίτερης χρήσης και λειτουργίας που έχει στα διαφορετικά πολιτισμικά συστήματα. Αρχικά εξετάζουμε την έννοια του χιούμορ εντοπίζοντας τη δυσκολία που ενέχει ο ορισμός του, αναλύουμε συνοπτικά κάποιες βασικές θεωρίες που έχουν διατυπωθεί σχετικά με το θέμα και εστιάζουμε στα διάφορα είδη του λεκτικού χιούμορ καθώς επίσης και στο ζήτημα της μετάφρασής τους. Στη συνέχεια, μελετάμε την οπτικοακουστική μετάφραση εντοπίζοντας τους περιορισμούς της και δίνοντας μεγαλύτερη έμφαση σε ένα από τα βασικότερα είδη της, τον υποτιτλισμό. Έπειτα, προχωράμε στη μελέτη περίπτωσης, η οποία έχει ως αντικείμενο την αμερικανική κωμωδία καταστάσεων How I Met your Mother. Με βάση το υλικό που συγκεντρώσαμε από τους ελληνικούς και τους γαλλικούς υπότιτλους της σειράς, καθορίζουμε τις μεθόδους και τις τεχνικές που συνηθέστερα προτιμώνται από τους μεταφραστές στην περίπτωση της μετάφρασης του χιούμορ. Τέλος, μελετώντας τα στατιστικά στοιχεία αναφορικά με τη συχνότητα στη χρήση των παραπάνω τεχνικών, καταλήγουμε σε ορισμένα συμπεράσματα σχετικά με τη χρήση των δύο βασικών μεταφραστικών στρατηγικών της οικειοποίησης και της ξενοποίησης τόσο στους ελληνικούς όσο και στους γαλλικούς υπότιτλους της σειράς.
description: The main objective of this thesis is to look into the way in which the humorous elements are translated in the subtitles of television series, since it is commonly accepted that humour is often challenging to translate, due to the unique use and function that it has in each cultural system. For the purpose of this study, we analyse the concept of humour and we realize how difficult it is to define it. We then look at some basic theories related to this issue and we analyse the different types of verbal humour and their translation. Then, we talk about audio-visual translation, identifying its limitations and putting more emphasis on one of its most basic types, that is subtitling. We then proceed to the case study, which has to do with the American sitcom How I Met your Mother. Based on the data we collected from the Greek and the French subtitles of the series, we define the methods and the techniques which are most commonly preferred by translators in the case of humour translation. Finally, using the statistics regarding the frequency in the use of the above-mentioned techniques, we reach some conclusions regarding the use of domestication and foreignization, two of the most widely accepted translation strategies.
Atomic Carbon in APM 08279+5255 at z=3.91
Creators: name: Wagg, J.
name: Wilner, D. J.
name: Neri, R.
name: Downes, D.
name: Wiklind, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a detection of [CI] line emission in the lensed quasar APM 08279+5255 at z=3.91 using the IRAM Plateau de Bure interferometer. The [CI] line velocity and width are similar to the values of previously detected high-J CO and HCN lines in this source, suggesting that the emission from all of these species arises from the same region. The apparent luminosity of the [CI] line is L'(CI) = (3.1 +/- 0.4)x10^10 K km/s pc^2, which implies a neutral carbon mass, M(CI) = (4.4+/-0.6)/m x10^7 M_sun, where m is the lensing magnification factor. The [CI] line luminosity is consistent with the large molecular gas mass inferred from the nuclear CO line luminosity ~10^11 /m M_sun. We also present an upper limit on the H2O line luminosity in APM 08279+5255 of, L'(H2O) < 1.8x10^10 K km/s pc^2 (3-sigma).
description: Accepted for publication in the Astrophysical Journal
Brane Cosmic String Compactification in Brans-Dicke Theory
Creators: name: Abdalla, M. C. B.
name: Guimaraes, M. E. X.
name: da Silva, J. M. Hoff
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate an alternative compactification of extra dimensions using local cosmic string in the Brans-Dicke gravity framework. In the context of dynamical systems it is possible to show that there exist a stable field configuration for the Einstein-Brans-Dicke equations. We explore the analogies between this particular model and the Randall-Sundrum scenario.
description: RevTex, 5 pages, no figures. To appear in the Physical Review D
DONeRF: Towards Real-Time Rendering of Compact Neural Radiance Fields using Depth Oracle Networks
Creators: name: Neff, Thomas
name: Stadlbauer, Pascal
name: Parger, Mathias
name: Kurz, Andreas
name: Mueller, Joerg H.
name: Chaitanya, Chakravarty R. Alla
name: Kaplanyan, Anton
name: Steinberger, Markus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: The recent research explosion around implicit neural representations, such as NeRF, shows that there is immense potential for implicitly storing high-quality scene and lighting information in compact neural networks. However, one major limitation preventing the use of NeRF in real-time rendering applications is the prohibitive computational cost of excessive network evaluations along each view ray, requiring dozens of petaFLOPS. In this work, we bring compact neural representations closer to practical rendering of synthetic content in real-time applications, such as games and virtual reality. We show that the number of samples required for each view ray can be significantly reduced when samples are placed around surfaces in the scene without compromising image quality. To this end, we propose a depth oracle network that predicts ray sample locations for each view ray with a single network evaluation. We show that using a classification network around logarithmically discretized and spherically warped depth values is essential to encode surface locations rather than directly estimating depth. The combination of these techniques leads to DONeRF, our compact dual network design with a depth oracle network as its first step and a locally sampled shading network for ray accumulation. With DONeRF, we reduce the inference costs by up to 48x compared to NeRF when conditioning on available ground truth depth information. Compared to concurrent acceleration methods for raymarching-based neural representations, DONeRF does not require additional memory for explicit caching or acceleration structures, and can render interactively (20 frames per second) on a single GPU.
description: Accepted to EGSR 2021 in the CGF track; Project website: https://depthoraclenerf.github.io/
Probing Clumpy Stellar Winds in SFXTs
Creators: name: Walter, R.
name: Zurita-Heras, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Quantitative constraints on the wind clumping of massive stars can be obtained from the study of the hard X-ray variability of SFXTs. In these systems, a large fraction of the hard X-ray emission is emitted in the form of flares with typical duration of 3 ksec, frequency of 7 days and luminosity of $10^{36}$ ergs/s. Such flares are most probably emitted by the interaction of a compact object orbiting at $\sim10$ R$_*$ with wind clumps ($10^{22-23}$ g). The density ratio between the clumps and the inter-clump medium is $10^{2-4}$ . The parameters of the clumps and of the inter-clump medium are in good agreement with macro-clumping scenario and line-driven instability simulations.
description: 3 pages, A Population Explosion: The Nature and Evolution of X-ray Binaries in Diverse Environments
Ανάπτυξη πλατφόρμας βασισμένη σε τεχνολογία Blockchain, για ασφαλή διαχείριση ιατρικών δεδομένων
Creators: name: 22/2/2019
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Αλυσίδα Μπλοκ
Εθέριουμ
Ιατρικά δεδομένα
Blockchain
Ethereum
Medical Data

description: Στα πλαίσια της συγκεκριμένης διπλωματικής εργασίας έχει αναπτυχθεί ένα σύστημα αδειοδότησης και ασφαλής καταγραφής γεγονότων (permission center & log management) των προσωπικών ιατρικών δεδομένων, πάνω σε μια ιδιωτική αλυσίδα Blockchain. Συγκεκριμένα, θα δίνεται η δυνατότητα στους χρήστες να δέχονται ή να απορρίπτουν οποιαδήποτε αίτημα για την χρήση των ιατρικών τους δεδομένων από τρίτα πρόσωπα (π.χ. γιατροί, συγγενείς, κτλ.) καθώς και να επιβλέπουν την κατάσταση τους σε ένα ασφαλές, αξιόπιστο και αποκεντρωμένο δίκτυο που προσφέρει η πρωτοποριακή τεχνολογία Blockchain. Από τεχνικής σκοπιάς υλοποιήθηκε ένα δίκτυο από κόμβους που απαρτίζουν την ιδιωτική αλυσίδα και μια φιλική προς τον χρήστη διαδικτυακή διεπαφή, ενώ για την ενδιάμεση επικοινωνία μεταξύ web πλατφόρμας και ιδιωτικής αλυσίδας αναπτύχθηκε κατάλληλο ενδιάμεσο λογισμικό (middleware) που υποστηρίζει τις λειτουργίες του συστήματος. Να σημειωθεί πως για την πιλοτική λειτουργία του μοντέλου έχει γίνει προσπάθεια να δοκιμαστεί μέρος της συγκεκριμένης εργασίας στην κλινική πλατφόρμα του έργου MyAirCoach.
description: The aim of the present thesis was the development of a blockchain network adequate for exchanging medical data and permission management. In details users would be able to accept or deny the use of their medical data from third parties entities like for instances doctors, relatives etc. as well to observe their data in a secure trusted and decentralized environment. Furthermore, we developed a distributed private ethereum network, a friendly user interface while also a dedicated middleware responsible for handling the functionalities of the system. For proof of concept a clinic platform called MyAirCoach was implemented in the platform to test its capabilities.
description: Σε συνεργασία με: Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
pi N --> Multi-pi N Scattering in the 1/N_c Expansion
Creators: name: Kwee, Herry J.
name: Lebed, Richard F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We extend the 1/N_c expansion meson-baryon scattering formalism to cases in which the final state contains more than two particles. We first show that the leading-order large N_c processes proceed through resonant intermediate states (e.g., rho N or pi Delta). We then tabulate linear amplitude expressions for relevant processes and find that the pole structure of baryon resonances can be uniquely identified by their (non)appearance in eta N or mixed partial-wave pi Delta final states. We also show that quantitative predictions of pi N to pi Delta branching ratios predicted at leading order alone do not agree with measurements, but the inclusion of 1/N_c corrections is ample to explain the discrepancies.
description: 23 pages, 3 eps figures, ReVTeX4, added reference and discussion, identical to PRD version
Assessing Mesh for Protecting Individual Turtle Nests against Red Fox (Vulpes vulpes) Predation
Creators: name: Terry, Regan
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 410401
subject: Conservation and biodiversity
classificationCode: 410407
subject: Wildlife and habitat management

description: Submitted in total fulfilment of the requirements for the degree of Master of Science to the School of Agriculture, Biomedicine & Environment, La Trobe University, Victoria, Australia.
The Coulomb branch of N=4 SYM and dilatonic scions in supergravity
Creators: name: Elander, Daniel
name: Piai, Maurizio
name: Roughley, John
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We find a parametrically light dilaton in special confining theories in three dimensions. Their duals form what we call a scion of solutions to the supergravity associated with the large-N limit of the Coulomb branch of the N=4 Super-Yang-Mills (SYM) theory. The supergravity description contains one scalar with bulk mass that saturates the Breitenlohner-Freedman unitarity bound. The new solutions are defined within supergravity, they break supersymmetry and scale invariance, and one dimension is compactified on a shrinking circle, yet they are completely regular. An approximate dilaton appears in the spectrum of background fluctuations (or composite states in the confining theory), and becomes parametrically light along a metastable portion of the scion of new supergravity solutions, in close proximity of a tachyonic instability. A first-order phase transition separates stable backgrounds, for which the approximate dilaton is not parametrically light, from metastable and unstable backgrounds, for which the dilaton becomes parametrically light, and eventually tachyonic.
description: 20 pages, 9 figures. Version accepted for publication
Supplementary document for Broadband achromatic and wide field-of-view single-layer metalenses in the mid-infrared - 6648865.pdf
Creators: name: Xu, Fan
name: Chen, Wenjie
name: Li, Ming
name: Liu, Peng
name: Chen, Yuhang
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplement 1
Access to information in Canada and the United States : a comparative case study
Creators: name: Anderson, Daniel R.
Publisher: name: University of British Columbia
Year: 2008

description: This paper compares access to information legislation in the United States and Canada and uses the findings of this comparison to test three theories of policymaking. In particular, the paper uses the comparison to explore the idea that the existence of access to information policies contradicts policymaking theories which stress the autonomy of the state. The paper begins with a detailed comparison of the Canadian and American legislation as it has been interpreted by the courts. This comparison finds that the two policies are very similar but three are some significant differences in the details of the two regimes and that these differences tend to make the Canadian access policy more restrictive than the American. The paper then examines whether these findings can be explained as being consistent with policy making theories which explain policy as being the result of a copying process, of interest group pressure or of institutional forces. In order to better understand the forces behind the legislation the legislative comparison is supplemented by reference to relevant policy papers and evidence from the period of the development of the two acts. The results of the analysis indicate that no one of the three theories is provides an adequate explanation of the two access policies. The legislation was a result of a combination interest group pressure and institutional forces and, in the case of the Canadian legislation, the process of copying also played a key role. The findings also indicate that explanations which stress the role of the state are not inconsistent with a policy that results in weakened state autonomy.
Relaxation of Thermal Capillary Waves for Nanoscale Liquid Films on Anisotropic-slip Substrates
Creators: name: Zhang, Yixin
name: Lockerby, Duncan A.
name: Sprittles, James E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The relaxation dynamics of thermal capillary waves for nanoscale liquid films on anisotropic-slip substrates are investigated, using both molecular dynamics (MD) simulations and a Langevin model. The anisotropy of slip on substrates is achieved using a specific lattice plane of a face-centred cubic lattice. This surface's anisotropy breaks the simple scalar proportionality between slip velocity and wall shear stress and requires the introduction of a slip-coefficient tensor. The Langevin equation can describe both the growth of capillary wave spectra and the relaxation of capillary wave correlations, with the former providing a time scale for the surface to reach thermal equilibrium. Temporal correlations of interfacial Fourier modes, measured at thermal equilibrium in MD, demonstrate that (i) larger slip lengths lead to a faster decay in wave correlations, and (ii) unlike on isotropic-slip substrates, the time correlations of waves on anisotropic-slip substrates are wave-direction dependent. These findings emerge naturally from the proposed Langevin equation, which becomes wave-direction dependent, agrees well with MD results, and allows to produce experimentally-verifiable predictions.
Hölder stability of quantitative photoacoustic tomography based on partial data
Creators: name: Triki, Faouzi
name: Xue, Qi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider the reconstruction of the diffusion and absorption coefficients of the diffusion equation from the internal information of the solution obtained from the first step of the inverse photoacoustic tomography (PAT). In practice, the internal information is only partially provided near the boundary due to the high absorption property of the medium and the limitation of the equipment. Our main contribution is to prove a Hölder stability of the inverse problem in a subregion where the internal information is reliably provided based on the stability estimation of a Cauchy problem satisfied by the diffusion coefficient. The exponent of the Hölder stability converges to a positive constant independent of the subregion as the subregion contracts towards the boundary. Numerical experiments demonstrates that it is possible to locally reconstruct the diffusion and absorption coefficients for smooth and even discontinuous media.
Search for Associations Containing Young stars (SACY): I. Sample & Searching Method
Creators: name: Torres, C. A. O.
name: Quast, G. R.
name: da Silva, L.
name: de la Reza, R.
name: Melo, C. H. F.
name: Sterzik, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report results from a high-resolution optical spectroscopic survey aimed to search for nearby young associations and young stars among optical counterparts of ROSAT All-Sky Survey X-ray sources in the Southern Hemisphere. We selected 1953 late-type (B-V >= 0.6), potentially young, optical counterparts out of a total of 9574 1RXS sources for follow-up observations. At least one high-resolution spectrum was obtained for each of 1511 targets. This paper is the first in a series presenting the results of the SACY survey. Here we describe our sample and our observations. We describe a convergence method in the (UVW) velocity space to find associations. As an example, we discuss the validity of this method in the framework of the BetaPic Association.
description: Accepted for publication in A&A
Αναλυτική μεγάλων δεδομένων με χρήση τεχνικών οπτικοποίησης
Creators: name: Τσαουσίδης, Φώτιος Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ανάλυση μεγάλων δεδομένων
Επιχειρηματική ευφυΐα
Τεχνικές οπτικοποίησης
Big data analytics
Business intelligence
Visualization techniques

description: Η εξέλιξη της τεχνολογίας, η εκρηκτική ανάπτυξη του διαδικτύου σε συνδυασμό με μια σειρά από άλλους παράγοντες, έχουν συντελέσει στην παραγωγή και ελεύθερη διάθεση, ενός τεράστιου όγκου δεδομένων και πληροφοριών, στα οποία έχει αποδοθεί ο όρος Μεγάλα Δεδομένα (Big Data). Ο όγκος και η ταχύτητα με την οποία παράγονται αυτά τα δεδομένα, δημιουργούν με τη σειρά τους την ανάγκη για δημιουργία καινούριων τεχνικών και μεθόδων επεξεργασίας τους, ώστε να καταστεί δυνατή η έγκαιρη και αποτελεσματική αξιοποίησή τους. Στην παρούσα εργασία επιχειρούμε να περιγράψουμε με τρόπο κατανοητό το φαινόμενο των Μεγάλων Δεδομένων, τις εφαρμογές και τις πηγές τους, με ιδιαίτερη αναφορά στα Ανοιχτά Δεδομένα. Αναλύεται η έννοια της Επιχειρηματικής Ευφυΐας και παρουσιάζονται οι σημαντικότερες μέθοδοι και εργαλεία Εξόρυξης Γνώσης από Δεδομένα. Δίνεται έμφαση στις τεχνικές ανάλυσης των Μεγάλων Δεδομένων και παρουσιάζεται εκτενέστερα η μέθοδος της Οπτικοποίησης. Επιλέγοντας δύο από τα πλέον αντιπροσωπευτικά λογισμικά Επιχειρηματικής Ευφυΐας τα οποία κάνουν ευρεία χρήση της τεχνικής των οπτικοποιήσεων, αναλύουμε και συγκρίνουμε τις λειτουργίες του QlikView και του Tableau. Η εργασία κλείνει με την μελέτη ενδεικτικών περιπτώσεων, κατά τις οποίες γίνεται διερεύνηση των δυνατοτήτων του Tableau.
description: The evolution of technology, the explosive growth of the internet combined with a number of other factors have contributed to the production and free disposal of a huge amount of data and information that has been given the term "Big Data". The volume and speed at which these data are generated in turn create the need for new techniques and methods of processing, in order to be able to use them in a timely and effective manner. In the present thesis we attempt to describe in a meaningful way the phenomenon of Big Data, their applications and their sources, with particular reference to Open Data. We analyze the concept of Business Intelligence and present the most important methods and tools of Data Mining. Emphasis is placed on the techniques of analyzing Big Data and the Visualization method is presented in more detail. By choosing two of the most representative Business Intelligence software applications that make extensive use of visualization techniques, we analyze and compare the functions of QlikView and Tableau. The thesis closes with the study of indicative cases and further exploration of Tableau’s features.
A new theorem for black holes
Creators: name: Ha, Yuan K.
Publisher: name: arXiv
Year: 2007
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: A new theorem for black holes is established. The mass of a black hole depends on where the observer is. The horizon mass theorem states that for all black holes: neutral, charged or rotating, the horizon mass is always twice the irreducible mass observed at infinity. The horizon mass theorem is crucial for understanding the occurrence of Hawking radiation. Without black hole radiation, the Second Law of Thermodynamics is lost.
description: Contribution to the XXVI International Colloquium on Group Theoretical Methods in Physics, New York, June 26-30, 2006
Filtering states with total spin on a quantum computer
Creators: name: Siwach, Pooja
name: Lacroix, Denis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Starting from a general wave function described on a set of spins/qubits, we propose several quantum algorithms to extract the components of this state on eigenstates of the total spin ${\bf S}^2$ and its azimuthal projection $S_z$. The method plays the role of total spin projection and gives access to the amplitudes of the initial state on a total spin basis. The different algorithms have various degrees of sophistication depending on the requested tasks. They can either solely project onto the subspace with good total spin or completely uplift the degeneracy in this subspace. After each measurement, the state collapses to one of the spin eigenstates that could be used for post-processing. For this reason, we call the method Total Quantum Spin filtering (TQSf). Possible applications ranging from many-body physics to random number generators are discussed.
description: 6 figures, 9 pages