cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Σχολιασμένη Μετάφραση του θεατρικού έργου Je tremble (1) [Αναρριγώ (1)], του Joël Pommerat
Creators: name: Καφάσης, Θεόδωρος Μιχαήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Θεατρική μετάφραση
Je Tremble
Pommerat
Theatrical translation
Je tremble

description: Η παρούσα διπλωματική εργασία αποτελεί σχολιασμένη μετάφραση στα ελληνικά του γαλλικού θεατρικού έργου Je tremble (1)[Αναρριγώ (1)], του Joël Pommerat (1963). Η μετάφραση εκπονήθηκε στο πλαίσιο της κατεύθυνσης “Μεταφρασεολογία - Μετάφραση Λογοτεχνίας και Επιστημών του Ανθρώπου” του Προγράμματος Μεταπτυχιακών Σπουδών του τμήματος Γαλλικής Γλώσσας και Φιλολογίας του Αριστοτελείου Πανεπιστημίου Θεσσαλονίκης. Η μετάφραση του έργου έγινε, υποτίθεται, κατόπιν παραγγελίας από ένα λογοτεχνικό περιοδικό, που συστήνει ξένα δραματικά κείμενα στο ελληνικό κοινό. Το οικείο και ζωντανό ύφος του Pommerat, η επιλογή του να εναλλάσσει διαρκώς το πραγματικό και το φανταστικό στοχείο στη μυθοπλασία του, η ιδιαίτερη προσέγγισή του, που καθρεφτίζει τη διπλή του ιδιότητα, του συγγραφέα και του σκηνοθέτη, αποτυπώνονται στο εν λόγω θεατρικό έργο. Μέχρι στιγμής, τα έργα του που είναι γνωστά στο ελληνικό κοινό αντιπροσωπεύουν ένα πολύ μικρό κομμάτι του συγγραφικού του corpus. Στο παρόν έργο παρουσιάζονται πτυχές της ανθρώπινης ύπαρξης σε ένα απροσδιόριστο χώρο μέσα στο θέατρο, που προσομοιάζει με καμπαρέ ή θέατρο. Παρουσιάζεται το πρωτότυπο κείμενο και το μετάφρασμα, αναλύεται η μεταφραστική διαδικασία, σχολιάζονται οι μεταφραστικές δυσκολίες του κειμένου και οι μεταφραστικές λύσεις που δόθηκαν προκειμένου το μετάφρασμα να είναι λειτουργικό και να πληροί επικοινωνιακά τους όρους δημιουργίας του.
description: The master thesis is an annotated translation in Greek, of the french play Je tremble (1), by Joël Pommerat (1963). The translation was done in the framework of the Postgraduate Program in Translation Studies – Literary and Humanities Translation, in the School of French of Aristotle University of Thessaloniki. The translation was, supposedly, commissioned by a literary magazine recommending foreign dramatic texts to the greek public. Pommerat's intimate and lively style, his choice to constantly alternate the real and the imaginary in his fiction, his distinctive approach, which shows his dual capacity as a writer and director, are reflected in the play. The plays of Pommerat that have been recommended to the greek public so far, represent only a small part of his writing corpus. This piece presents aspects of human existence in an indefinable space within the theater, resembling a cabaret or a theater. Original text and translation are displayed. We analyse the translation process that was followed, and comment on the translational difficulties as well as the translation solutions given, in order to create a functional translation and to meet the conditions for its creation.
Matching in Closed-Form: Equilibrium, Identification, and Comparative Statics
Creators: name: Bojilov, Raicho
name: Galichon, Alfred
Publisher: name: arXiv
Year: 2021
Subjects: subject: Theoretical Economics (econ.TH)
subject: FOS: Economics and business

description: This paper provides closed-form formulas for a multidimensional two-sided matching problem with transferable utility and heterogeneity in tastes. When the matching surplus is quadratic, the marginal distributions of the characteristics are normal, and when the heterogeneity in tastes is of the continuous logit type, as in Choo and Siow (J Polit Econ 114:172-201, 2006), we show that the optimal matching distribution is also jointly normal and can be computed in closed form from the model primitives. Conversely, the quadratic surplus function can be identified from the optimal matching distribution, also in closed-form. The closed-form formulas make it computationally easy to solve problems with even a very large number of matches and allow for quantitative predictions about the evolution of the solution as the technology and the characteristics of the matching populations change.
description: 30 pages
Ηλεκτρονικός Σύμβουλος Ψήφου και Ευρωπαϊκές Εκλογές 2019: Αξιολόγηση Προτάσεων και Εκτίμηση των Θέσεων των Ελληνικών Πολιτικών Κομμάτων
Creators: name: Καράμπελας, Πολυχρόνης Σπυρίδωνα
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ηλεκτρονικός Σύμβουλος Ψήφου
Εκλογές
Ελληνικά Πολιτικά Κόμματα
Έρευνα Εμπειρογνωμόνων
Μέθοδος Delphi
Μεθοδολογία
Ευρωπαϊκές Εκλογές
Voting Advice Applications
Elections
Greek Political Parties
Expert Surveys
Delphi Method
Methodology
European Elections
VAAs

description: Η παρούσα διπλωματική εργασία πραγματεύεται τη διαδικασία κατασκευής ενός ηλεκτρονικού συμβούλου ψήφου (Voting Advice Application - VAA). Επιχειρείται η αξιολόγηση συγκεκριμένων προτάσεων (statements) και η εκτίμηση των πολιτικών θέσεων των κυριότερων ελληνικών πολιτικών κομμάτων. H μελέτη βασίζεται σε ερωτηματολογίο απευθυνόμενο σε προπτυχιακούς και μεταπτυχιακούς φοιτητές της πολιτικής επιστήμης και κεντρικό σκοπό της αποτελεί η σύγκριση διαφορετικών μεθόδων εκτίμησης των πολιτικών θέσεων των κομμάτων. Συγκεκριμένα συγκρίνονται δύο μέθοδοι, η έρευνα εμπειρογνωμόνων και η μέθοδος Delphi. Βάσει της ανάλυσης των ευρημάτων της μελέτης, η μέθοδος Delphi κρίνεται ως η πιο χρήσιμη μέθοδος από τις δύο, αλλά κρίνεται απαραίτητο να υπάρξει και περαιτέρω μελέτη με σύγκριση και άλλων μεθόδων. Επίσης, προτείνεται η κατασκευή ενός κώδικα δεοντολογίας και οικουμενικών κριτηρίων και κατευθυντήριων γραμμών για την επιλογή κομμάτων και προτάσεων στους ηλεκτρονικούς συμβούλους ψήφου.
description: This master thesis explores the process of constructing a Voting Advice Application (VAA). In particular, it attempts to evaluate specific statements and estimate the position of the main political parties in Greece. A questionnaire addressed to undergraduate and postgraduate students of political science was constructed for the study with the main goal being to compare different methods of estimating the position of the political parties. Specifically, two methods are compared, the expert survey and the Delphi method. Based on the analysis of the findings, the Delphi method is considered to be a more useful method, but further study is necessary by comparing the discussed methods with other methods of estimating the position of political parties. It is also proposed that VAA researchers construct a code of conduct and universal criteria and guidelines for the selection of parties and statements.
Deep Learning-based Extreme Heatwave Forecast
Creators: name: Jacques-Dumas, Valérian
name: Ragone, Francesco
name: Borgnat, Pierre
name: Abry, Patrice
name: Bouchet, Freddy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Because of the impact of extreme heat waves and heat domes on society and biodiversity, their study is a key challenge. We specifically study long-lasting extreme heat waves, which are among the most important for climate impacts. Physics driven weather forecast systems or climate models can be used to forecast their occurrence or predict their probability. The present work explores the use of deep learning architectures, trained using outputs of a climate model, as an alternative strategy to forecast the occurrence of extreme long-lasting heatwaves. This new approach will be useful for several key scientific goals which include the study of climate model statistics, building a quantitative proxy for resampling rare events in climate models, study the impact of climate change, and should eventually be useful for forecasting. Fulfilling these important goals implies addressing issues such as class-size imbalance that is intrinsically associated with rare event prediction, assessing the potential benefits of transfer learning to address the nested nature of extreme events (naturally included in less extreme ones). We train a Convolutional Neural Network, using 1000 years of climate model outputs, with large-class undersampling and transfer learning. From the observed snapshots of the surface temperature and the 500 hPa geopotential height fields, the trained network achieves significant performance in forecasting the occurrence of long-lasting extreme heatwaves. We are able to predict them at three different levels of intensity, and as early as 15 days ahead of the start of the event (30 days ahead of the end of the event).
description: 21 pages, 5 figures
หลักการวิจัยอันเกี่ยวกับการคุกคามทางสื่อออนไลน์ผ่านอินเตอร์เน็ต (บทความวารสาร)
Creators: name: นิศานาถ มั่งศิริ
Publisher: name: มหาวิทยาลัยราชภัฏสวนดุสิต
Year: 2556

description: วารสารวิจัย มสด สาขามนุษยศาสตร์และสังคมศาสตร์, 9, 2
Online Radicalization of White Women to Organized White Supremacy
Creators: Badalich, Savannah
Publisher: name: Columbia University
Year: 2019
Subjects: White supremacy movements
Women, White
Social media
Radicalization
Gender identity--Political aspects
Human rights

description: Since its early mainstream adoption in the 1990s, the Internet has been leveraged by white supremacist groups to recruit and radicalize individuals. Twenty years later, social media platforms, like YouTube, reddit, and Twitter, continue to further this practice. The attention of researchers has been primarily centered on white supremacist men, and this focus on white men erases white women’s roles as active agents in the spread of white supremacy, skewing our understanding of white supremacy as a whole. This study used digital ethnography and interviews to examine the ways white women are radicalized to organized white supremacy through popular social media platforms YouTube, reddit, and Twitter. The study found white women were radicalized by engaging with posts and joining communities focusing on beauty, anti-feminism or “The Red Pill,” traditionalist gender values or #TradLives, and alt-right politics. White supremacist recruiters leveraged gendered topics and weaponized platform features – likes, sharing, comments, recommendation algorithms, etc. – to cultivate a sense of community. Through involvement with these communities, women were introduced to racialized perspectives on each topic, usually after a catalytic pop culture or newsworthy event, and slowly radicalized to organized white supremacy.
Decay of the Higgs boson $h\toτ^- τ^+\toπ^-ν_τ\,π^+{\bar ν}_τ$ for a non-Hermitian Yukawa interaction
Creators: name: Korchin, A. Yu.
name: Kovalchuk, V. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The differential rate of the decay of the Higgs boson ($h$) to a pair of $τ$ leptons with their subsequent decay in the $τ^-\to π^- ν_τ$ and $τ^+\to π^+{\bar ν}_τ$ channels is studied. The Yukawa interaction between the Higgs boson and the $τ$ leptons is assumed to include scalar ($S$) and pseudoscalar ($PS$) couplings. Angular distributions of the pions in the $h\toτ^- τ^+\toπ^-ν_τ\,π^+{\bar ν}_τ$ decay are considered. For real values of the $S$ and $PS$ couplings, this decay is known to be a source of information on $\mathcal{CP}$ violation in the $h ττ$ interaction. In the present paper, the main attention is paid to a possible non-Hermiticity of this interaction. Influence of non-Hermiticity on the distribution of the angle between planes of the $ τ^- \to π^-ν_τ$ and $τ^+ \to π^+ {\bar ν}_τ$ decays, and distribution of the polar angle of one of the pions are analyzed. Asymmetries sensitive to parameters of $\mathcal{CP}$ violation and non-Hermiticity of $h ττ$ interaction are proposed.
description: 12 pages, 4 figures, appolb style; v2: published version
The Stellar Structures around Disk Galaxies
Creators: name: Drozdovsky, I.
name: Tikhonov, N.
name: Aparicio, A.
name: Gallart, C.
name: Monelli, M.
name: Hidalgo, S.
name: Bernard, E. J.
name: Galazutdinova, O.
name: Team, The LCID
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a brief summary of our current results on the stellar distribution and population gradients of the resolved stars in the surroundings of ~50 nearby disk galaxies, observed with space- (Hubble & Spitzer) and ground-based telescopes (Subaru, VLT, BTA, Palomar, CFHT & INT). We examine the radial (in-plane) and vertical (extraplanar) distributions of resolved stars as a function of stellar age and metallicity by tracking changes in the color-magnitude diagram of face-on and edge-on galaxies. Our data show, that the scale length and height of a stellar population increases with age, with the oldest detected stellar populations identified at a large galactocentric radius or extraplanar height, out to typically a few kpc. In the most massive of the studied galaxies there is evidence for a break in number density and color gradients of evolved stars, which plausibly correspond to the thick disk and halo components of the galaxies. The ratio of intermediate-age to old stars in the outermost fields correlate with the gas fraction, while relative sizes of the thick-to-thin disks anticorrelate with galactic circular velocity.
description: To appear in the proceedings for the IAUS 241 'Stellar Populations as Building Blocks of Galaxies' held in La Palma, Spain, December 10-16 2006
Density functional theory of freezing for soft interactions in two dimensions
Creators: name: van Teeffelen, Sven
name: Likos, Christos N.
name: Hoffmann, Norman
name: Löwen, Hartmut
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A density functional theory of two-dimensional freezing is presented for a soft interaction potential that scales as inverse cube of particle distance. This repulsive potential between parallel, induced dipoles is realized for paramagnetic colloids on an interface, which are additionally exposed to an external magnetic field. An extended modified weighted density approximation which includes correct triplet correlations in the liquid state is used. The theoretical prediction of the freezing transition is in good agreement with experimental and simulation data.
description: 7 pages, 3 figures, submitted 2006
SkillVet: Automated Traceability Analysis of Amazon Alexa Skills
Creators: name: Edu, Jide S
name: Ferrer-Aran, Xavier
name: Such, Jose M
name: Suarez-Tangil, Guillermo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Third-party software, or skills, are essential components in Smart Personal Assistants (SPA). The number of skills has grown rapidly, dominated by a changing environment that has no clear business model. Skills can access personal information and this may pose a risk to users. However, there is little information about how this ecosystem works, let alone the tools that can facilitate its study. In this paper, we present the largest systematic measurement of the Amazon Alexa skill ecosystem to date. We study developers' practices in this ecosystem, including how they collect and justify the need for sensitive information, by designing a methodology to identify over-privileged skills with broken privacy policies. We collect 199,295 Alexa skills and uncover that around 43% of the skills (and 50% of the developers) that request these permissions follow bad privacy practices, including (partially) broken data permissions traceability. In order to perform this kind of analysis at scale, we present SkillVet that leverages machine learning and natural language processing techniques, and generates high-accuracy prediction sets. We report a number of concerning practices including how developers can bypass Alexa's permission system through account linking and conversational skills, and offer recommendations on how to improve transparency, privacy and security. Resulting from the responsible disclosure we have conducted, 13% of the reported issues no longer pose a threat at submission time.
description: 17 pages, 8 figures. A shorter version of this paper appears in IEEE Transactions on Dependable and Secure Computing. This is the extended version
Axions, their Relatives and Prospects for the Future
Creators: name: Jaeckel, Joerg
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The observation of a non-vanishing rotation of linear polarized laser light after passage through a strong magnetic field by the PVLAS collaboration has renewed the interest in light particles coupled to photons. Axions are a species of such particles that is theoretically well motivated. However, the relation between coupling and mass predicted by standard axion models conflicts with the PVLAS observation. Moreover, light particles with a coupling to photons of the strength required to explain PVLAS face trouble from astrophysical bounds. We discuss models that can avoid these bounds. Finally, we present some ideas to test these possible explanations of PVLAS experimentally.
description: 11 pages, 4 figures. Contributed to the ``Third Symposium on Large TPCs for Low Energy Rare Event Detection'' in Paris, December 2006
Quantum Entanglement Manifestation of Transition to Nonlinear Self-trapping for Bose-Einstein Condensates in a Symmetric Double-Well
Creators: name: Fu, Li-Bin
name: Liu, Jie
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the nonlinear self-trapping phenomenon of the Bose-Einstein condensates (BEC) in a symmetric double-well, emphasizing on its behind dynamical phase transition. With increasing the nonlinear parameter depicting the interaction between the degenerate atoms the BEC turns to be self-trapped manifesting an asymmetric distribution of the atomic density profile. Essence of this phenomenon is revealed to be a continuous phase transition and underlying critical behavior is studied analytically and found to follow a logarithm scaling-law. We then go beyond the mean field treatment and extend to discuss the effect of the many-body quantum fluctuation on the transition. It is found that the transition point is shifted and the scaling-law is broken. In particular, the quantum phase transition is accompanied by the change of the entanglement entropy which is found to reach maximum at transition point. Behind physics is revealed.
description: 6 pages, 5 figures
Η γλωσσική αυτοβιογραφία ως εργαλείο διαπολιτισμικής προσέγγισης στη Β΄ τάξη του Ενιαίου Λυκείου: Μια μελέτη περίπτωσης
Creators: name: Κηρύκου, Κωνσταντίνα Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Γλωσσική αυτοβιογραφία
Διαπολιτισμική προσέγγιση
Κείμενα ταυτότητας
Language autobiography
Intercultural approach
Identity texts

description: Σκοπός της παρούσας εργασίας είναι να διερευνηθεί πώς μπορεί να αξιοποιηθεί η γλωσσική αυτοβιογραφία ως εργαλείο διαπολιτισμικής προσέγγισης στο Ενιαίο Λύκειο. Ως «γλωσσική αυτοβιογραφία» ορίζεται η αφήγηση των γλωσσικών διαδρομών ενός ιστορικού υποκείμενου σε μία δεδομένη στιγμή. Ειδικότερα, αντικείμενο μελέτης της παρούσας εργασίας είναι τα κείμενα των γλωσσικών αυτοβιογραφιών των μαθητριών και των μαθητών της Β’ τάξης ενός Λυκείου του κέντρου της Θεσσαλονίκης. Αρχικά, προτάθηκαν στους/στις μαθητές/τριες ως έναυσμα για προβληματισμό κείμενα γνωστών συγγραφέων που αναφέρονται στη βιογραφική σχέση τους με τη γλώσσα (κείμενα ταύτισης). Στη συνέχεια, οι μαθητές/τριες προχώρησαν στην παραγωγή των δικών τους κειμένων (κείμενα ταυτότητας). Μέσα από μία μελέτη περίπτωσης στο πλαίσιο μιας ποιοτικής έρευνας, η παρούσα εργασία συνεισφέρει, στο μέτρο των δυνατοτήτων της, στην ανάδειξη των «φωνών» των υποκειμένων της έρευνας, στην ανάδειξη της πολυγλωσσίας στο σύγχρονο ελληνικό πολυπολιτισμικό σχολείο και γενικότερα στη σύνδεση της κοινωνιογλωσσολογίας με τη διδακτική της γλώσσας. Παρά τις πρωτόγνωρες συνθήκες που δημιούργησε η αναστολή της λειτουργίας των σχολείων, η έρευνα υλοποιήθηκε επιβεβαιώνοντας σε μεγάλο βαθμό αρκετά από τα ευρήματα της βιβλιογραφικής αναζήτησης.
description: The aim of this paper is to study how language autobiography can be used as a tool of intercultural approach in the Greek Unified Upper Secondary School. "Language autobiography" is defined as the narration of a historical subject’s linguistic paths at a given moment. In particular, the object of this study is the texts of Second Grade pupils’ language autobiographies of an Upper Secondary School in the center of Thessaloniki. Initially, texts of well-known authors referring to their biographical relation with language were suggested to the students as a stimulus for reflection (identification texts). Then, the students proceeded in writing their own texts (identity texts). Through a qualitative case study, the present work contributes, as far as possible, to the emergence of the "voices" of the research subjects, to the emergence of multilingualism in the modern multicultural Greek school and in a broader view to relate sociolinguistics with language teaching. Despite the unprecedented conditions created by the school closure, the research was carried out, confirming to a large extent several of the findings of the bibliographic search.
Εξέλιξη της αντιληπτής γνώσης και αυτοπεποίθησης προπτυχιακών εκπαιδευτικών δημοτικής εκπαίδευσης σχετικά με την διδασκαλία ζητημάτων βιώσιμης διατροφής και σχολικού λαχανόκηπου
Creators: name: Κωνσταντινίδου, Κυριακή Σάββα
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Βιώσιμη διατροφή
Σχολικός κήπος
Αειφόρος εκπαιδευση
Sustainable diet
School garden
Sustainable education

description: Η παρούσα έρευνα ασχολήθηκε με το θέμα της βιώσιμης διατροφής και με το πώς μπορεί να συμβάλει προς αυτή την κατεύθυνση ο σχολικός λαχανόκηπος. Ως συμμετέχοντες είχε φοιτητές της Παιδαγωγικής σχολής του Α.Π.Θ. οι οποίοι παρακολούθησαν κατά το εαρινό εξάμηνο του 2019-‘20 ένα μάθημα με θέμα την διδακτική της βιώσιμης διατροφής στο δημοτικό σχολείο και τη σχέση της με το σχολικό λαχανόκηπο. Οι φοιτητές απάντησαν σε δύο ερωτηματολόγια, ένα για την αίσθηση ικανότητας στην διδασκαλία θεμάτων αειφορίας και ένα για την στάση τους και την αίσθηση ικανότητας στην χρήση ενός σχολικού λαχανόκηπου στα περιβαλλοντικά τους προγράμματα. Τα ερωτηματολόγια, τα οποία περιείχαν κλειστές και ανοιχτές ερωτήσεις, τα απάντησαν οι φοιτητές πριν την διδακτική παρέμβαση και μετά από αυτή. Τα αποτελέσματα της έρευνας έδειξαν ότι οι φοιτητές μετά το εκπαιδευτικό πρόγραμμα αισθάνονται ικανότεροι στο να διδάξουν θέματα αειφορίας στο δημοτικό σχολείο με τις μεθόδους της Π.Ε. αλλά η στάση τους απέναντι στην χρήση ενός σχολικού λαχανόκηπου δεν άλλαξε προς το θετικότερο.
description: Abstract This research focuses on the sustainable diet and how the school garden can contribute to this goal. Participants were students of Pedagogical Faculty of AUTH who examined subjects such as the teaching of sustainable diet in primary school and the relation which exist with the school garden. The students answered two kinds of questionnaires, one for self efficacy in teaching sustainable subjects in primary school and one for their attitude and their self efficacy in using a school garden. The students answered twice the questionnaires (first before the educational program and second at the end of the educational program). The two questionnaires had closed and opened questions. The results of the research showed that students feel more capable in teaching sustainable subjects after the educational program but they do not change with a positive way their attitude in using a school garden.
Variational theory combining number-projected BCS and coupled-cluster doubles
Creators: name: Baran, V. V.
name: Dukelsky, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The ground state pairing correlations in finite fermionic systems are described with a high degree of accuracy within a variational approach based on a combined coupled-cluster and particle-number-projected BCS ansatz. The flexibility of this symmetry-preserving wavefunction enables a unified picture valid from weak to strong coupling, both in small and large systems. The present variational approach consistently yields an energy upper bound while operating at the same level of precision of the non-variational particle-number projected Bogoliubov-coupled-cluster theory [Phys. Rev. C 99, 044301 (2019)].
description: 10 pages, 5 figures
Iterated Monodromy Groups of Quadratic Polynomials, I
Creators: name: Bartholdi, Laurent
name: Nekrashevych, Volodymyr V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Group Theory (math.GR)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We describe the iterated monodromy groups associated with post-critically finite quadratic polynomials, and explicit their connection to the `kneading sequence' of the polynomial. We then give recursive presentations by generators and relations for these groups, and study some of their properties, like torsion and `branchness'.
description: 18 pages, 3 EPS figures
POPULATION AND ECONOMIC DEVELOPMENT: EVIDENCE FROM NIGERIA
Creators: name: Drs. Chukuemeka, R. Amadi
name: Dr. Nneka, U. Nwankwo
name: Dr. Nwikina,, Christian G
Publisher: name: TOP Journal
Year: 2024
Subjects: Population, Economic Development, Evidence, Human development index, Nigeria

description: The study focuses on population on economic development in Nigeria. The data were analysed using ordinary least square (OLS) and econometrics of unit root, cointegration and error correction model. The finding revealed that the influence of population and fertility have negative and positive in short and long run, and also not having significant relationship with economic development while the mortality has negative relationship in short and long run and insignificant. Based on the findings, the study concludes that population growth has significant positive and significant impact on economic development in Nigeria. The study recommends that Nigeria government should control its rapidly growing population by formulating and implementing population and economic policies that are supportive of societal welfare; also, ensure that it reduces mortality rate by taking healthcare system in the country seriously, noting that only a healthy labour force can contribute meaningfully towards output expansion.
Εκπαίδευση και κοινωνικός αποκλεισμός: Μία κριτική αποτίμηση του σχολείου από (πρώην) χρήστες ουσιών
Creators: name: Μητροβγένη-Πολυχρονάτου, Ρόζα
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Χρήση ουσιών
Εκπαίδευση
Πρόληψη χρήσης ναρκωτικών
Use of substance
Education
Drug prevention

description: Ένας πολύ μεγάλος αριθμός χρηστών ουσιών υφίσταται κοινωνικό (εκπαιδευτικό) αποκλεισμό, καθώς η πλειονότητα των εξαρτημένων από ουσίες που απευθύνονται σε προγράμματα απεξάρτησης, κατά την διάρκεια της σχολικής τους φοίτησης, σημειώνουν σχολική διαρροή. Σκοπός της παρούσας έρευνας είναι η κριτική αποτίμηση του σχολείου από (πρώην) χρήστες ουσιών. Πιο συγκεκριμένα, μέσω της χαρτογράφησης της σχολικής τους εμπειρίας, διερευνάται ο ρόλος του σχολείου στην πορεία τους προς την τοξικομανία, οι ευθύνες που του αναλογούν αλλά και οι δυνατότητες που έχει τόσο σε επίπεδο πρόληψης κατά των ναρκωτικών, όσο και σε επίπεδο ενδυνάμωσης των παιδιών εκείνων που ήδη παρουσιάζουν προβληματική σχέση με ψυχότροπες ουσίες.
description: A huge number of drug users incurs social (educational) exclusion, as the majority of addicts from substance who turn to detox programs , during their schooling experience, lead to school drop out. The purpose of this research is the critical evaluation of the school by (former) substance users. More specifically an attempt is made to investigate, through the mapping of their school experience, the role of the school in their course towards drug addiction, the responsibilities that belong to it and consequently the possibilities that it has both in terms of prevention against drugs and in terms of empowerment of those children who already have a problematic relationship with psychotropic substances
Polynomials Associated with Dihedral Groups
Creators: name: Dunkl, Charles F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary 33C45, 33C80, Secondary 20F55

description: There is a commutative algebra of differential-difference operators, with two parameters, associated to any dihedral group with an even number of reflections. The intertwining operator relates this algebra to the algebra of partial derivatives. This paper presents an explicit form of the action of the intertwining operator on polynomials by use of harmonic and Jacobi polynomials. The last section of the paper deals with parameter values for which the formulae have singularities.
description: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Weierstrass semigroup at $m+1$ rational points in maximal curves which cannot be covered by the Hermitian curve
Creators: name: Castellanos, Alonso Sepúlveda
name: Bras-Amorós, Maria
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: Information Theory (cs.IT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: G.2.3; E.4
subject: 14Q05 Curves (computational aspects), 94B05 Linear codes, general

description: We determine the Weierstrass semigroup $H(P_\infty,P_1,\ldots,P_m)$ at several rational points on the maximal curves which cannot be covered by the Hermitian curve introduced by Tafazolian, Teherán-Herrera, and Torres. Furthermore, we present some conditions to find pure gaps. We use this semigroup to obtain AG codes with better relative parameters than comparable one-point AG codes arising from these curves.
Millisecond microwave spikes: statistical study and application for plasma diagnostics
Creators: name: Rozhansky, I. V.
name: Fleishman, G. D.
name: Huang, G. -L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyze a dense cluster of solar radio spikes registered at ~ 4.5 -- 6 GHz by the Purple Mountain Observatory spectrometer (Nanjing, China) operating in the 4.5 -- 7.5 GHz range with the 5 ms temporal resolution. To handle with the data from the spectrometer we developed a new technique utilizing a nonlinear multi-Gaussian spectral fit based on chi-squared criteria to extract individual spikes from the originally recorded spectra. Applying this method to the experimental raw data we eventually identified about 3000 spikes for this event, which allows for a detailed statistical analysis. Various statistical characteristics of the spikes have been evaluated, including intensity distributions, spectral bandwidth distributions, and distribution of the spike mean frequencies. The most striking finding of this analysis is distributions of the spike bandwidth, which are remarkably asymmetric. To reveal the underlaying microphysics we explore the local trap model with the renormalized theory of spectral profile of the electron cyclotron maser (ECM) emission peak in a source with random magnetic irregularities. The distribution of the solar spikes relative bandwidth calculated within the local trap model represents an excellent fit to the experimental data. Accordingly, the developed technique may offer a new tool of studying very low levels of the magnetic turbulence in the spike sources, when the ECM mechanism of the spike cluster is confirmed.
description: 27 pages, 15 figures, ApJ accepted
Spatial and Temporal Coherence in Strongly Coupled Plasmonic Bose-Einstein Condensates
Creators: name: Moilanen, Antti J.
name: Daskalakis, Konstantinos S.
name: Taskinen, Jani M.
name: Törmä, Päivi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We report first-order spatial and temporal correlations in strongly coupled plasmonic Bose-Einstein condensates. The condensate is large, more than twenty times the spatial coherence length of the polaritons in the uncondensed system and hundred times the healing length, making plasmonic lattices an attractive platform for studying long-range spatial correlations in two dimensions (2D). We find that both spatial and temporal coherence display non-exponential decay; the results suggest power-law or stretched exponential behaviour with different exponents for spatial and temporal correlation decays.
description: 13 pages, 16 figures
Identifying at-risk early primary students : global, academic and specific skills assessments
Creators: name: Francis, Rosalyn Frances
Publisher: name: University of British Columbia
Year: 2008

description: The primary purpose of this study is to investigate the extent to which teacher ratings are consistent in classifying kindergarten students when using measuring instruments that range from a broad global classification to a specific skills rating system. A secondary purpose of this study is to validate a Teacher-made Checklist of skills intended for kindergarten or early primary children. The problem that the study addressed was, if teachers apply their own standards in making global assessments of children's performance, to what extent are these ratings consistent with subsequent specific ratings using several global items or several specific ratings of skills and abilities? The study was conducted over three phases. In the first phase, the teachers were asked to categorize the students in one of their kindergarten classes as high, average or low. Secondly, teachers were asked to rate their students using the Academic Competence Questionnaire subtest from the Social Skills Rating System (Gresham & Elliott, 1990). In the third and final phase teachers were asked to rate their students using a skill specific Teacher-made Checklist. A total of 17 kindergarten teachers participated in the study. They rated 336 kindergarten students. A series of correlational analyses were computed in order to establish validity of the Teacher-made Checklist. As well, a procedure using Hierarchical Cluster Analysis was utilized in order to form homogeneous groups of students and to assist in making predictions of at-risk and low-risk groups. A series of one-way ANOVA's were computed to test if significant differences existed between the clusters and post hoc analysis using Tukey procedure was used to test for the extent of the difference between the groups. Cross-tabular analyses were performed to investigate differences in grouping patterns among the three phases. Although teachers initially categorized the students into three groups, four groups emerged using Cluster Analysis in Phases 2 and 3. The Teacher Checklist using the subscales appeared to identify the students into four groups most clearly. The data and analyses indicated that teachers are uniform in classifying students, however teachers need guidelines to assist them in identifying those students who may be at-risk for school learning problems. A follow-up study to further validate the Teacher Checklist is needed.
Βελτιστοποίηση συγκόλλησης δια τριβής με ανάδευση όμοιων και ανόμοιων κραμάτων αλουμινίου AA5083 και AA7075
Creators: name: Τσικρικώνης, Ιωάννης Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Συγκόλληση διά τριβής με ανάδευση
Ανόμοιες συγκολλήσεις
Κράματα AA5083 και AA7075
Friction stir welding
Dissimilar welds
Aluminum AA5083 and AA7075

description: Τα τελευταία χρόνια οι αυξανόμενες απαιτήσεις της βιομηχανίας για ελαφρά και ανθεκτικά υλικά οδήγησαν την έρευνα στη μελέτη διαφόρων κραμάτων αλουμινίου καθώς είναι σχετικά φθηνά κι έχουν υψηλό λόγο αντοχής προς βάρος. Τα κράματα αλουμινίου χρησιμοποιούνται σε διάφορους τομείς της βιομηχανίας όπως η αεροδιαστημική, η αυτοκινητοβιομηχανία και η ναυπηγική. Σε πολλές εφαρμογές τους απαιτείται συγκόλληση όμοιων είτε ανόμοιων κραμάτων οι οποίες με τις συμβατικές μεθόδους τήξης είτε είναι ανέφικτες είτε υποβαθμίζουν την ποιότητα της συγκόλλησης. Η συγκόλληση δια τριβής με ανάδευση, η οποία είναι τεχνική συγκόλλησης στερεάς κατάστασης, αποτελεί μια λύση η οποία γνωρίζει όλο και πιο ευρεία εφαρμογή διότι είναι φιλική προς το περιβάλλον, εξοικονομείται ενέργεια και αποφεύγονται συνήθη σφάλματα όπως η ρωγμή στερεοποίησης. Σκοπός της παρούσας εργασίας ήταν η εύρεση των βέλτιστων παραμέτρων ώστε να πραγματοποιηθούν επιτυχείς όμοιες και ανόμοιες συγκολλήσεις. Έτσι, πραγματοποιήθηκε σχεδίαση και κατασκευή τριών (3) εργαλείων για την εκτέλεση μετωπικών συγκολλήσεων λεπτών ελασμάτων κραμάτων 5083-H111 και 7075-T651. Έγινε βελτιστοποίηση των παραμέτρων και μελετήθηκε η μικροδομή των συγκολλήσεων με το οπτικό μικροσκόπιο. Τέλος, μετρήθηκε η μικροσκληρότητα στις βέλτιστες συγκολλήσεις.
description: In recent years, the growing demands of the industry for lightweight and durable materials have led to research into the study of various aluminum alloys as they are relatively inexpensive and have a high strength-to-weight ratio. Aluminum alloys are used in various sectors of the industry such as aerospace, automotive and shipbuilding. Many of their applications require the welding of similar or dissimilar alloys which by conventional fusion methods are either impossible or degrade the quality of the weld. Friction Stir welding, which is a solid state welding technique, is a solution that is becoming more and more widely used because it is environmentally friendly, saves energy and avoids common errors such as solidification crack. The aim of this work was to find the optimal parameters to perform successful similar and dissimilar welds. Thus, three (3) tools were designed and manufactured to perform similar and dissimilar butt welds of thin alloy plates 5083-H111 and 7075-T651. The parameters were optimized and the microstructure of the welds was studied with the optical microscope. Finally, micro-hardness measurements of the optimal welds were made.
Multi-frequency characterisation of remnant radio galaxies in the Lockman Hole field
Creators: name: Jurlin, N.
name: Brienza, M.
name: Morganti, R.
name: Wadadekar, Y.
name: Ishwara-Chandra, C. H.
name: Maddox, N.
name: Mahatma, V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Remnant radio galaxies represent an important phase in the life-cycle of radio active galactic nuclei. It is suggested that in this phase, the jets have switched off and the extended emission is fading rapidly. This phase is not well-studied due to the lack of statistical samples observed at both low and high frequencies. In this work, we study a sample of 23 candidate remnant radio galaxies previously selected using the Low Frequency Array at 150 MHz in the Lockman Hole field. We examine their morphologies and study their spectral properties to confirm their remnant nature and revise the morphological and spectral criteria used to define the initial sample. We present new observations with the Karl G. Jansky Very Large Array at 6000 MHz at both high and low resolution. These observations allowed us to observe the presence or absence of cores and study the spectral curvature and steepness of the spectra of the total emission expected at these high frequencies for the remnant candidates. We confirm 13 out of 23 candidates as remnant radio sources. This corresponds to 7% of the full sample of active, restarted, and remnant candidates from the Lockman Hole field. Surprisingly, only a minority of remnants reside in a cluster (23%). The remnant radio galaxies show a range of properties and morphologies. The majority do not show detection of the core at 6000 MHz and their extended emission often shows ultra-steep spectra (USS). However, there are also remnants with USS total emission and a detection of the core at 6000 MHz, possibly indicating a variety of evolutionary stages in the remnant phase. We confirm the importance of the combination of morphological and spectral criteria and this needs to be taken into consideration when selecting a sample of remnant radio sources.
description: 24 pages, 7 figures, 7 tables, A&A accepted
Rank-preserving module maps
Creators: name: Meng, Bin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: In this paper, we characterize rank one preserving module maps on a Hilbert $C^\ast-$module and study its applications on free probability theory.
THE IMPORTANCE OF ENCOURAGING STUDENTS TO LEARN LANGUAGES.
Creators: name: Buronova, Gulhayo
name: Ravshanova, Muhayyo
Publisher: name: Zenodo
Year: 2023

description: People have several different reasons to learn a foreign language; people often learn a language for practical reasons while others have a particular love for the language and its people. So in this article gives information about the importance of encouraging students to learn languages.
Constraints on the abundance of primordial black holes with different mass distributions from lensing of fast radio bursts
Creators: name: Zhou, Huan
name: Li, Zhengxiang
name: Huang, Zhiqi
name: Gao, He
name: Huang, Lu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Primordial black holes (PBHs) has been considered to form a part of dark matter for a long time but the possibility has been poorly constrained over a wide mass range, including the stellar mass range ($1-100~M_{\odot}$). However, due to the discovery of merger events of black hole binaries by LIGO-Virgo gravitational wave observatories, the interest for PBHs in the stellar mass window has been aroused again. Fast radio bursts (FRBs) are bright radio transients with millisecond duration and very high all-sky occurrence rate. Lensing effect of these bursts has been proposed as one of the optimal probes for constraining the abundance of PBHs in the stellar mass range. In this paper, we first investigate constraints on the abundance of PBHs from the latest $593$ FRB observations for both the monochromatic mass distribution and three other popular extended mass distributions related to different formation mechanisms of PBHs. It is found that constraints from currently public FRB observations are relatively weaker than those from existing gravitational wave detections. Furthermore, we forecast constraining power of future FRB observations on the abundance of PBHs with different mass distributions of PBHs and different redshift distributions of FRBs taken into account. Finally, We find that constraints of parameter space on extended mass distributions from $\sim10^5$ FRBs with $\overline{Δt}\leq1 ~\rm ms$ would be comparable with what can be constrained from gravitational wave events. It is foreseen that upcoming complementary multi-messenger observations will yield considerable constraints on the possibilities of PBHs in this intriguing mass window.
description: 13 pages, 8 figures, Accepted by MNRAS
Continuous measurements enhanced self-trapping of degenerate ultra-cold atoms: Nonlinear Quantum Zeno Effect
Creators: name: Li, WeiDong
name: Liu, Jie
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: In the present paper we investigate the influence of measurements on the quantum dynamics of degenerate Bose atoms gases in a symmetric double-well. We show that continuous measurements enhance asymmetry on the density distribution of the atoms and broaden the parameter regime for self-trapping. We term this phenomenon as nonlinear quantum Zeno effect in analog to the celebrated Zeno effect in a linear quantum system. Under discontinuous measurements, the self-trapping due to the atomic interaction in the degenerate bosons is shown to be destroyed completely. Underlying physics is revealed and possible experimental realization is discussed.
description: 8 pages, 8 figures
Astronomy, Astrophysics, and Space Physics in Greece
Creators: name: Charmandaris, V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the present document I review the current organizational structure of Astronomy, Astrophysics and Space Physics in Greece. I briefly present the institutions where professional astronomers are pursuing research, along with some notes of their history, as well as the major astronomical facilities currently available within Greece. I touch upon topics related to graduate studies in Greece and present some statistics on the distribution of Greek astronomers. Even though every attempt is made to substantiate all issues mentioned, some of the views presented have inevitably a personal touch and thus should be treated as such.
description: Paper to be published in ``Organizations and Strategies in Astronomy -- Vol. 7, Ed. A. Heck, 2006, Springer, Dordrecht". Higher resolution version available at http://www.physics.uoc.gr/~vassilis/papers/AstroInGreece.pdf
New signals of a R-parity violating model of neutrino mass at the Tevatron
Creators: name: Datta, Amitava
name: Poddar, Sujoy
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In a variety models of neutrino masses and mixings the lighter top squark decays into competing R - parity violating and R - parity conserving channels. Using Pythia we have estimated in a model independent way the minimum value of P $\equiv$ BR($\widetilde t_1 \to c \widetilde χ_1^0 $) $\times$ BR($\widetilde t_1 \to l^+_i b$), where $l_i = e^+$ and $μ^+$, corresponding to an observable signal involving the final state 1$l$ + jets +$\met$ (carried by the neutrinos from the $\tilde χ_1^0$ decay) at Tevatron Run II. For the kinematical cuts designed in this paper P depends on $m_{\widetilde t_1}$ only. We then compute P for representative choices of the model parameters constrained by the oscillation data and find that over a significant region of the allowed parameter space P is indeed larger than $P_{min}$. This signal is complementary to the dilepton + dijet signal studied in several earlier experimental and phenomenological analyses and may be observed even if BR($\widetilde t_1 \to l^+_i b$) is an order of magnitude smaller than BR($\widetilde t_1 \to c \widetilde χ_1^0$). The invariant mass distribution of the hardest lepton and the hardest jet may determine $m_{\widetilde t_1}$ and reveal the lepton number violating nature of the underlying interaction. The invariant mass distribution of the two lowest energy jets may determine $m_{\widetilde χ_1^0}$.
description: Some minor changes in language are made at pages 1,2,8 and 18 respectively