cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Αξιολόγηση Περιβαλλοντικής Μελέτης ενός τεχνικού έργου
Creators: name: Σωτηράκου, Αναστασία Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Περιβαλλοντική Μελέτη
Ν. 1650/1986
Ν. 4014/2011
Environmental Assessment

description: Στην παρούσα διπλωματική εργασία με τίτλο «Αξιολόγηση Περιβαλλοντικής Μελέτης ενός τεχνικού έργου» εξετάζεται ο ρόλος των Περιβαλλοντικών Μελετών ως εργαλείο περιβαλλοντικής πολιτικής στην Ελλάδα. Η προστασία του περιβάλλοντος και η σωστή διαχείρισή του αποτελεί τον βασικό άξονα της διαμόρφωσης του νομοθετικού πλαισίου για την περιβαλλοντική συνέπεια που πρέπει να εμφανίζουν τα δημόσια έργα στην Ελλάδα. Στόχος της παρούσας εργασίας είναι η αξιολόγηση του θεσμικού πλαισίου που διέπει την περιβαλλοντική αδειοδότηση έργων και δραστηριοτήτων. Για την επίτευξη αυτού του στόχου έγινε αναφορά στα δύο κομβικά σημεία της περιβαλλοντικής νομοθεσίας, δηλαδή στον Ν. 1650/1986 και στον Ν. 4014/2011 και εξετάστηκαν οι αλλαγές που έχουν επέλθει στη διαδικασία περιβαλλοντικής αδειοδότησης και το κατά πόσο οι αλλαγές αυτές έχουν επιφέρει την ουσιαστική προστασία του περιβάλλοντος. Προκειμένου να αποκτηθεί μια πλήρης εικόνα του τι τελικά είναι Μελέτη Περιβαλλοντικών Επιπτώσεων και ποιος είναι ο τρόπος σύνταξης της σύμφωνα με την νομοθεσία που είναι σήμερα σε ισχύ, παρατίθεται στο τέλος της διπλωματικής εργασίας μια συνοπτική περιγραφή μιας Μελέτης Περιβάλλοντος για τροποποίηση ΑΕΠΟ ενός τεχνικού έργου, η οποία φέρει τον τίτλο «Μετατόπιση τμήματος της Επαρχιακής Οδού Φλώρινας – Αχλάδας στο τμήμα Τ.Κ. Μελίτης – Τ.Κ. Αχλάδας».
description: In the recent thesis with the title “Appraisal of an environmental assessment in a constructive project”, the role of Environmental Impact Assessment, as a tool in the formulation of environmental policy in Greece, is being examined. The protection of the environment as a whole and the correct management of the natural resources constitute the basis of the general legislative framework regarding the environmental consistency that public constructions in our country should have. The goal of this thesis is the appraisal of the institutional framework which governs the environmental licensing of constructive work and activities. For the achievement of the above, reference has been made to two basic points of the environmental law system, specifically law 1650/1986 and law 4014/2011. The changes that have been created in the process of environmental licensing have also been examined as well as whether these changes have been helpful or not in creating a substantial protection of the environment. In order to gain a clear image of what exactly an Environmental Impact Assessment is and how it is being redacted according to the presently active law, a summary description of an Environmental Impact Assessment has been analyzed in the end of this thesis, whose purpose is the amendment of a decision for approval of environmental terms of a specific constructive project which is being titled as “relocation of a part of the provincial road Flwrina - Axlada in the department of TK Meliti – TK Axlada”.
The Supernova Type Ia Rate Evolution with SNLS
Creators: name: Neill, J. D.
name: Sullivan, M.
name: Balam, D.
name: Pritchet, C. J.
name: Howell, D. A.
name: Perrett, K.
name: Astier, P.
name: Aubourg, E.
name: Basa, S.
name: Carlberg, R. G.
name: Conley, A.
name: Fabbro, S.
name: Fouchez, D.
name: Guy, J.
name: Hook, I.
name: Pain, R.
name: Palanque-Delabrouille, N.
name: Regnault, N.
name: Rich, J.
name: Taillet, R.
name: Aldering, G.
name: Antilogus, P.
name: Arsenijevic, V.
name: Balland, C.
name: Baumont, S.
name: Bronder, J.
name: Ellis, R. S.
name: Filiol, M.
name: Gonçalves, A. C.
name: Hardin, D.
name: Kowalski, M.
name: Lidman, C.
name: Lusset, V.
name: Mouchet, M.
name: Mourao, A.
name: Perlmutter, S.
name: Ripoche, P.
name: Schlegel, D.
name: Tao, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a progress report on a project to derive the evolution of the volumetric supernova Type Ia rate from the Supernova Legacy Survey. Our preliminary estimate of the rate evolution divides the sample from Neill et al. (2006) into two redshift bins: 0.2 < z < 0.4, and 0.4 < z < 0.6. We extend this by adding a bin from the sample analyzed in Sullivan et al. (2006) in the range 0.6 < z < 0.75 from the same time period. We compare the derived trend with previously published rates and a supernova Type Ia production model having two components: one component associated closely with star formation and an additional component associated with host galaxy mass. Our observed trend is consistent with this model, which predicts a rising SN Ia rate out to at least z=2.
description: 6 pages, 1 figure, To appear in "The Multicoloured Landscape of Compact Objects and their Explosive Progenitors: Theory vs Observations" (Cefalu, Sicily, June 2006). Eds. L. Burderi et al. (New York: AIP)
Implementing non-scalar diffraction in Fourier optics via the Braunbek method
Creators: name: Harness, Anthony
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Fourier optics is a powerful and efficient tool for solving many diffraction problems, but relies on the assumption of scalar diffraction theory and ignores the three-dimensional structure and material properties of the diffracting element. Recent experiments of sub-scale starshade external occulters revealed that the inclusion of these physical properties is necessary to explain the observed diffraction at 1e-10 of the incident light intensity. Here, we present a methodology for implementing non-scalar diffraction while maintaining the efficiency and ease of standard Fourier optics techniques. Our methodology is based on that of Braunbek, in which the Kirchhoff boundary values are replaced with the exact field in a narrow seam surrounding the edge of the diffracting element. In this paper, we derive the diffraction equations used to implement non-scalar diffraction and outline the computational implementation used to solve those equations. We also provide experimental results that demonstrate our model can replicate the observational signatures of non-scalar diffraction in sub-scale starshades, in effect validating our model to better than 1e-10 in relative intensity. We believe this method to be an efficient tool for including additional physics to the models of coronagraphs and other optical systems in which a full electromagnetic solution is intractable.
description: 20 pages, 12 figures
Εκτροχιασμός σιδηροδρομικών οχημάτων: καταγραφή, ανάλυση και αξιολόγηση των μεθόδων ελέγχου σε εκτροχιασμό
Creators: name: Στρουμπούλης, Αστέριος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Εκτροχιασμός
Μέθοδοι ελέγχου εκτροχιασμού
Αξιολόγηση μεθόδων ελέγχου εκτροχιασμού
Derailment
Control methods in derailment
Evaluation of control methods in derailment

description: Η παρούσα Διπλωματική Εργασία με τίτλο «Εκτροχιασμός σιδηροδρομικών οχημάτων – καταγραφή, ανάλυση και αξιολόγηση των μεθόδων ελέγχου σε εκτροχιασμό» πραγματεύεται τις μεθόδους που προτείνονται στη διεθνή βιβλιογραφία για τον έλεγχο εκτροχιασμού στα σιδηροδρομικά οχήματα. Για την πληρέστερη κατανόηση του συγκεκριμένου ζητήματος κρίθηκε σκόπιμη, σε αρχικό στάδιο, η αναφορά στα τρία είδη εκτροχιασμού που υπάρχουν (εκτροχιασμός λόγω αναρρίχησης του τροχού, εκτροχιασμός λόγω εγκάρσιας μετατόπισης της γραμμής και εκτροχιασμός λόγω ανατροπής του οχήματος) καθώς και στις δυνάμεις που υπεισέρχονται σε αυτά. Ακολούθως, γίνεται εκτενής παρουσίαση και αξιολόγηση αναλυτικών μαθηματικών σχέσεων, λογισμικών και μεθόδων που χρησιμοποιούνται για τον έλεγχο σε εκτροχιασμό. Στο τελευταίο κεφάλαιο παρουσιάζονται τα συμπεράσματα της εργασίας αυτής.
description: The present Diploma Thesis entitled “Derailment of railway vehicles – recording, analysis and evaluation of control methods in derailment” addresses methods available in the international literature for controlling derailment of rail vehicles. In order to better understand this issue was considered appropriate, at an early stage, to refer to the three derailment types which are available (derailment due to wheel climbing, derailment due to displacement of the line and derailment due to rollover of the vehicle), as well as the forces that go into them. Subsequently, there is an extensive presentation and evaluation of the analytical mathematical relationships, software and methods being used in order to prevent derailment. The final chapter presents the conclusions.
A convective boundary layer model with time-adaptive grids
Creators: name: Rucker, Magdalena
Publisher: name: University of British Columbia
Year: 2009

description: This thesis presents the first implementation of time-adaptive non-uniform grid distributions in higher order turbulence closure modelling of the convective boundary layer. The aim was to introduce a vertical grid that resolves the surface and entrainment layers, but uses coarser resolution elsewhere. Two types of grid generating methods were examined with the Level 2.5 turbulence closure model (Mellor and Yamada, 1982; Yamada, 1983). The solution profiles of mean and turbulent quantities were compared to model results obtained with stationary grid distributions of the same mesh size as well as a reference solution obtained with a grid resolution of 10m.
Algebraic Approximations of a Polyhedron Correlation Function Stemming from its Chord Length Distribution
Creators: name: Ciccariello, Salvino
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics

description: An algebraic approximation, of order $K$, of a polyhedron correlation function (CF) can be obtained from $γ\pp(r)$, its chord-length distribution (CLD), considering first, within the subinterval $[D_{i-1},\, D_i]$ of the full range of distances, a polynomial in the two variables $(r-D_{i-1})^{1/2}$ and $(D_{i}-r)^{1/2}$ such that its expansions around $r=D_{i-1}$ and $r=D_i$ simultaneously coincide with left and the right expansions of $γ\pp(r)$ around $D_{i-1}$ and $D_i$ up to the terms $O\big(r-D_{i-1}\big)^{K/2}$ and $O\big(D_i-r\big)^{K/2}$, respectively. Then, for each $i$, one integrates twice the polynomial and determines the integration constants matching the resulting integrals at the common end points. The 3D Fourier transform of the resulting algebraic CF approximation correctly reproduces, at large $q$s, the asymptotic behaviour of the exact form factor up to the term $O(q^{-(K/2+4)})$. For illustration, the procedure is applied to the cube, the tetrahedron and the octahedron.
description: 14 pages, 7 figures
Sigma model from SU(1,1|2) spin chain
Creators: name: Bellucci, S.
name: Casteill, P. -Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive the coherent state representation of the integrable spin chain Hamiltonian with supersymmetry group $SU(1,1|2)$. By the use of a projected Hamiltonian onto bosonic states, we give explicitly the action of the Hamiltonian on $SU(2)\times SL(2)$ coherent states. Passing to the continuous limit, we find that the corresponding bosonic sigma model is the sum of the known SU(2) and SL(2) ones, and thus it gives a string spinning fast on $S^1_{ϕ_1}\times S^1_{ϕ_1}\times S^1_{ϕ_2}$ in $\rm{AdS}_5 \times S^5$. The full sigma model on the supercoset $SU(1,1|2)/SU(1|1)^2$ is given.
description: 20 pages, no figures, 4 tables, 1 appendix; typos corrected, references added
Lex mercatoria και Incoterms ως επιμέρους έκφανση αυτής. Έκδοση Incoterms® 2010 και ερμηνεία των όρων.
Creators: name: Νικολοπούλου, Χριστίνα Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Ρήτρες
Lex mercatoria
Incoterms
Terms

description: Αντικείμενο της παρούσης εργασίας είναι το φαινόμενο της lex mercatoria.Αφού έγινε μια προσπάθεια ορισμού της έννοιας, διατρέξαμε ιστορικά την εξέλιξη της στις διεθνείς συναλλαγές, ενώ αναφερθήκαμε στις πηγές της. Στη συνέχεια, παρουσιάστηκαν οι απόψεις της αλλοδαπής και ελληνικής θεωρίας για την έννοια, τη νομική φύση και τη δεσμευτικότητα της, αλλά και η αντιμετώπιση της από τα εθνικά δικαστήρια. Επιπρόσθετα έγινε αναφορά στους διεθνείς εμπορικούς όρους Incoterms, και συγκεκριμένα στη νομική φύση, στο τι ρυθμίζουν σε μια σύμβαση διεθνούς πώλησης κινητών πραγμάτων, αλλά και στο Διεθνές Εμπορικό Επιμελητήριο, ως φορέα θεσμοθέτησης τους. Τέλος παρουσιάστηκε η έκδοση Incoterms ® 2010 και έγινε προσπάθεια ερμηνείας των όρων σε σχέση και με το ελληνικό δίκαιο.
description: The present study has as subject the phenomenon of lex mercatoria. After we tried to define this notion, we made a historical reference to the development of this concept through international commercial transactions, and also, a reference to its legal sources. Subsequently we presented the foreign and Greek legal theoretical views for the phenomenon, its legal nature and its legal binding, but also how Greek Court of Justice came up against lex mercatoria. Additionally we mentioned International Commercial Terms and specifically their legal nature, what they deal with in an international sales contract, and International Chamber of Commerce as an organization who codifies and interprets international commercial usages. Last but not least, we presented the Incoterms ® 2010 edition and tried to interpret each term also in relation to Greek law.
Cooperativity and the origins of rapid, single-exponential kinetics in protein folding
Creators: name: Faisca, P. F. N.
name: Plaxco, K. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: The folding of naturally occurring, single domain proteins is usually well-described as a simple, single exponential process lacking significant trapped states. Here we further explore the hypothesis that the smooth energy landscape this implies, and the rapid kinetics it engenders, arises due to the extraordinary thermodynamic cooperativity of protein folding. Studying Miyazawa-Jernigan lattice polymers we find that, even under conditions where the folding energy landscape is relatively optimized (designed sequences folding at their temperature of maximum folding rate), the folding of protein-like heteropolymers is accelerated when their thermodynamic cooperativity enhanced by enhancing the non-additivity of their energy potentials. At lower temperatures, where kinetic traps presumably play a more significant role in defining folding rates, we observe still greater cooperativity-induced acceleration. Consistent with these observations, we find that the folding kinetics of our computational models more closely approximate single-exponential behavior as their cooperativity approaches optimal levels. These observations suggest that the rapid folding of naturally occurring proteins is, at least in part, consequences of their remarkably cooperative folding.
Role of continuum in nuclear direct reactions with one-neutron halo nuclei: a one-dimensional model
Creators: name: Moschini, Laura
name: Moro, Antonio M.
name: Vitturi, Andrea
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the evolution of a single-particle wave function during the collision of a one dimensional potential well by another well, which can be regarded as a simple model for the problem of the scattering of a one-neutron halo nucleus by another nucleus. This constitutes an effective three-body problem, whose solution in three dimensions can be extremely complicated, particularly when breakup and rearrangement channels are to be considered. Our one-dimensional model provides the essential three-body nature of this problem, and allows for a much simpler application and assessment of different methods of solution. To simplify further the problem, we assume that the potential well representing the projectile moves according to a predetermined classical trajectory, although the internal motion of the "valence" particle is treated fully quantum-mechanically. This corresponds to a semiclassical approach of the scattering problem. Different approaches are investigated to understand the dynamics involving one-body halo-like systems: the "exact" time-dependent solution of the Schrödinger equation is compared to a numerical continuum-discretized coupled-channels (CC) calculation presenting various model cases including different reaction channels. This framework allows us to discuss the reaction mechanism and the role of continuum, whose inclusion in the CC calculation results to be crucial to reproduce the "exact" solution, even when the initial and final states are well bound. We also link each dynamical situation with analogous problem solved in a three dimensional (3D) CC framework, discussing the main challenges experienced in the usual 3D models.
GRID Architecture through a Public Cluster
Creators: name: Akbar, Z.
name: Handoko, L. T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: An architecture to enable some blocks consisting of several nodes in a public cluster connected to different grid collaborations is introduced. It is realized by inserting a web-service in addition to the standard Globus Toolkit. The new web-service performs two main tasks : authenticate the digital certificate contained in an incoming requests and forward it to the designated block. The appropriate block is mapped with the username of the block's owner contained in the digital certificate. It is argued that this algorithm opens an opportunity for any blocks in a public cluster to join various global grids.
description: 5 pages, Proceeding of the 2008 International Conference on Computer and Communication Engineering
Spontaneous superconductivity and optical properties of high-Tc cuprates
Creators: name: Chernodub, M. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We suggest that the high temperature superconductivity in cuprate compounds may emerge due to interaction between copper-oxygen layers mediated by in-plane plasmons. The strength of the interaction is determined by the c-axis geometry and by the ab-plane optical properties. Without making reference to any particular in-plane mechanism of superconductivity, we show that the interlayer interaction favors spontaneous appearance of the superconductivity in the layers. At a qualitative level the model describes correctly the dependence of the transition temperature on the interlayer distance, and on the number of adjacent layers in multilayered homologous compounds. Moreover, the model has a potential to explain (i) a mismatch between the optimal doping levels for critical temperature and superconducting density and (ii) a universal scaling relation between the dc-conductivity, the superfluid density, and the superconducting transition temperature.
description: 4.4 pages, 2 figures; v2 matches the published version (clarifying remarks and references are added)
Understanding the Memory Window Overestimation of 2D Materials Based Floating Gate Type Memory Devices by Measuring Floating Gate Voltage
Creators: name: Sasaki, Taro
name: Ueno, Keiji
name: Taniguchi, Takashi
name: Watanabe, Kenji
name: Nishimura, Tomonori
name: Nagashio, Kosuke
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The memory window of floating gate (FG) type non-volatile memory (NVM) devices is a fundamental figure of merit used not only to evaluate the performance, such as retention and endurance, but also to discuss the feasibility of advanced functional memory devices. However, the memory window of two dimensional (2D) materials based NVM devices is historically determined from round sweep transfer curves, while that of conventional Si NVM devices is determined from high and low threshold voltages (Vths), which are measured by single sweep transfer curves. Here, it is elucidated that the memory window of 2D NVM devices determined from round sweep transfer curves is overestimated compared with that determined from single sweep transfer curves. The floating gate voltage measurement proposed in this study clarifies that the Vths in round sweep are controlled not only by the number of charges stored in floating gate but also by capacitive coupling between floating gate and back gate. The present finding on the overestimation of memory window enables to appropriately evaluate the potential of 2D NVM devices.
Trust and faith in science versus obedience and following orders in Milgram's imagined online experiment
Creators: name: Grzyb, Tomasz
name: Dolinski, Dariusz
Publisher: name: OSF Registries
Year: 2024
Subjects: subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology

description: In the online study on the internet panel, we aim to verify how trust in science (measured by two statements in the questionnaire) will be related to behavior in the imagined Milgram experiment.
Braided homology of quantum groups
Creators: name: Hadfield, Tom
name: Kraehmer, Ulrich
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 58B32, 16W30, 19D55

description: We study braided Hochschild and cyclic homology of ribbon algebras in braided monoidal categories, as introduced by Baez and by Akrami and Majid. We compute this invariant for several examples coming from quantum groups and braided groups.
description: 25 pages, 12 figures. Final version, to appear in Journal of K-theory
FUNDAMENTOS TEÓRICOS Y METODOLÓGICOS PARA EL DESARROLLO DE LA COMPETENCIA COMUNICATIVA Y PRAGMÁTICA PROFESIONAL DE LOS JÓVENES DOCENTES.
Creators: name: Xamrakulova Barchinoy Abduraxmatovna, O'zDJTU,  katta o'qituvchi
Publisher: name: Zenodo
Year: 2024

description: El objetivo general de esta investigación se basa en analizar las competencias comunicativas como factor fundamental para el desarrollo social. La metodología empleada en esta investigación se efectúa través de un diseño no experimental, a través de una revisión sistemática y posee un nivel descriptivo cualitativo. 

Palabras claves: Competencia comunicativa; lingüística; capacidades; desarrollo.
Ζητήματα διγραμματισμού: Η ανταπόκριση παιδιών στην ταυτόχρονη εκμάθηση διαφορετικών αλφαβητικών συστημάτων. Μία μελέτη περίπτωση παιδιών αλβανικής μεταναστευτικής καταγωγής
Creators: name: Οικονόμου, Σωτηρία Αχιλλέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Ταυτόχρονος διγραμματισμός
Γραφικό σύστημα
Παιδιά αλβανικής μεταναστευτικής καταγωγής
Simultaneous biliteracy
Writing system
Immigrant children of albanian origin

description: Σκοπός της διατριβής ήταν η μελέτη της πορείας που ακολουθούν τα παιδιά τα οποία αναπτύσσουν ταυτόχρονα το γραμματισμό σε δύο γλώσσες. Εξετάστηκε η ορολογία που χρησιμοποιείται για το διγραμματισμό, καθώς και οι σημαντικότερες από τις θεωρητικές προσεγγίσεις που έχουν προταθεί σχετικά. Η έρευνας εστίασε στην παρατήρησης της πρώτης τάξης του αλβανικού σχολείου του Συλλόγου Μεταναστών Θεσσαλονίκης «Μητέρα Τερέζα» και πιο συγκεκριμένα σε δεκαέξι παιδιά τα οποία μάθαιναν την αλβανική γλώσσα (γλώσσα της χώρας καταγωγής) ταυτόχρονα με την ελληνική (γλώσσα της χώρας υποδοχής). Η μελέτη προσπαθεί να απαντήσει στα ερωτήματα εξής: πώς μικρά παιδιά ανταποκρίνονται στο καθήκον της ταυτόχρονης εκμάθησης περισσότερων του ενός γραφικών συστημάτων; Είναι δυνατόν να συνδυάσουν τις εμπειρίες γραμματισμού που αντλούν από διαφορετικά περιβάλλοντα ή, όπως ευρύτερα πιστεύεται, μια τέτοια μίξη οδηγεί σε σύγχυση και αποτυχία; Και αν είναι δυνατός ένας τέτοιος συνδυασμός, σε ποιο βαθμό οι δύο γλώσσες αλληλεπιδρούν μεταξύ τους και πώς οι νεαροί χρήστες της γλώσσας αντιμετωπίζουν τα ζητήματα αυτά;
description: The aim of this dissertation was to study the way children evolve when becoming literate in two languages simultaneously. The issues examined were the terminology related to biliteracy as well as the most important already suggested approaches. The research was focused on monitoring the first grade students of the Albanian school of the Thessaloniki Immigrants Organization 'Mother Teresa' and more specifically the sixteen children learning the Albanian language (which is the language spoken in the origin country) in parallel with the Greek language (which is the language spoken in the host country). The study attempts to answer to questions like: how can young children respond to learning two writing systems at the same time? Is it possible to combine the literacy experiences gained by different environments or does such a combination lead to confusion and failure as it is widely believed? And if such a combination is possible, to what extent do the two languages interact and how do young learners cope with these issues?
Non-local spin Seebeck effect in the bulk easy-plane antiferromagnet NiO
Creators: name: Hoogeboom, Geert R.
name: van Wees, Bart J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the observation of magnon spin currents generated by the Spin Seebeck effect (SSE) in a bulk single crystal of the easy-plane antiferromagnet NiO. A magnetic field induces a non-degeneracy and thereby an imbalance in the population of magnon modes with opposite spin. A temperature gradient then gives rise to a non-zero magnon spin current. This SSE is measured both in a local and a non-local geometry at 5$\,$K in bulk NiO. The magnetic field dependence of the obtained signal is modelled by magnetic field splitting of the low energy magnon modes, affecting the spin Seebeck coefficient. The relevant magnon modes at this temperature are linked to cubic anisotropy and magnetic dipole-dipole interactions. The non-local signal deviates from the expected quadratic Joule heating by saturating at a current from around 75$\,μA$ in the injector. The magnon chemical potential does not decay exponentially with distance and inhomogeneities may be the result of local magnon accumulations.
Y(2175): Distinguish Hybrid State from Higher Quarkonium
Creators: name: Ding, Gui-Jun
name: Yan, Mu-Lin
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The possibility of Y(2175) as a $2{^3D_1}$ $s\bar{s}$ meson is studied. We study the decay of $2{^3D_1}$ $s\bar{s}$ from both the $^3P_0$ model and the flux tube model, and the results are similar in the two models. We show that the decay patterns of $1^{--}$ strangeonium hybrid and $2{^3D_1}$ $s\bar{s}$ are very different. The experimental search of the decay modes $KK$, $K^{*}K^{*}$, $K(1460)K$, $h_1(1380)η$ is suggested to distinguish the two pictures. Measuring the $K^{*}K^{*}$ partial width ratios is crucial to discriminate the $2{^3D_1}$ from the $3{^3S_1}$ $s\bar{s}$ assignment.
description: 13 pages, 8 figures
Exploring the Galaxy's halo and very metal-weak thick disk with SkyMapper and Gaia DR2
Creators: name: Cordoni, G.
name: Da Costa, G. S.
name: Yong, D.
name: Mackey, A. D.
name: Marino, A. F.
name: Monty, S.
name: Nordlander, T.
name: Norris, J. E.
name: Asplund, M.
name: Bessell, M. S.
name: Casey, A. R.
name: Frebel, A.
name: Lind, K.
name: Murphy, S. J.
name: Schmidt, B. P.
name: Gao, X. D.
name: Xylakis-Dornbusch, T.
name: Amarsi, A. M.
name: Milone, A. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this work we combine spectroscopic information from the \textit{SkyMapper survey for Extremely Metal-Poor stars} and astrometry from Gaia DR2 to investigate the kinematics of a sample of 475 stars with a metallicity range of $ -6.5 \leq \rm [Fe/H] \leq -2.05$ dex. Exploiting the action map, we identify 16 and 40 stars dynamically consistent with the \textit{Gaia Sausage} and \textit{Gaia Sequoia} accretion events, respectively. The most metal-poor of these candidates have metallicities of $\rm [Fe/H]=-3.31$ and $\rm [Fe/H]=-3.74$, respectively, helping to define the low-metallicity tail of the progenitors involved in the accretion events. We also find, consistent with other studies, that $\sim$21\% of the sample have orbits that remain confined to within 3~kpc of the Galactic plane, i.e., |Z$_{max}$| $\leq$ 3~kpc. Of particular interest is a sub-sample ($\sim$11\% of the total) of low |Z$_{max}$| stars with low eccentricities and prograde motions. The lowest metallicity of these stars has [Fe/H] = --4.30 and the sub-sample is best interpreted as the very low-metallicity tail of the metal-weak thick disk population. The low |Z$_{max}$|, low eccentricity stars with retrograde orbits are likely accreted, while the low |Z$_{max}$|, high eccentricity pro- and retrograde stars are plausibly associated with the \textit{Gaia Sausage} system. We find that a small fraction of our sample ($\sim$4\% of the total) is likely escaping from the Galaxy, and postulate that these stars have gained energy from gravitational interactions that occur when infalling dwarf galaxies are tidally disrupted.
description: 23 pages, 15 figures, accepted for publication in MNRAS
Viewing angle effects in quasar application to cosmology
Creators: name: Prince, Raj
name: Czerny, Bozena
name: Pollo, Agnieszka
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The symmetry axes of active galactic nuclei (AGN) are randomly distributed in space but highly inclined sources are heavily obscured and are not seen as quasars with broad emission lines. The obscuring torus geometry determines the average viewing angle, and if the torus geometry changes with the redshift, this average viewing angle will also change. Thus the ratio between the isotropic luminosity and observed luminosity may change systematically with redshift. Therefore, if we use quasars to measure the luminosity distance by evaluating the isotropic absolute luminosity and measuring the observed flux, we can have a redshift-dependent bias which can propagate to cosmological parameters. We propose a toy model for testing the effect of viewing angle uncertainty on measurement of the luminosity distance. The model is based on analytical description of the obscuring torus applied to one-parameter observational data. It illustrates the possible change of the torus covering factor between the two chosen redshift ranges. We have estimated the possible error on specific cosmological parameters (H0,Omega_m) for the flat Lambda-CDM cosmology if a method is calibrated at low redshift and applied to the higher redshift. The errors on cosmological parameters due to potential dependence of viewing angle on redshift are found to be potentially significant, and the effect will have to be accommodated in the future in all quasar-based cosmological methods. A careful systematic study of AGN mean viewing angle across redshift is necessary, with the use of appropriate samples and models which uniquely determine the inclination of each source.
description: 15 pages, 10 figures, Accepted for publication in ApJ
Axial exchange currents and nucleon spin
Creators: name: Barquilla-Cano, D.
name: Buchmann, A. J.
name: Hernandez, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the hypercharge and flavor singlet axial couplings related to the spin of the nucleon in a constituent quark model. In addition to the standard one-body axial currents, the model includes two-body axial exchange currents. The latter are necessary to satisfy the Partial Conservation of Axial Current (PCAC) condition. For both axial couplings we find significant corrections to the standard quark model prediction. Exchange currents reduce the valence quark contribution to the nucleon spin and afford an interpretation of the missing nucleon spin as orbital angular momentum carried by nonvalence quark degrees of freedom.
description: 14 pages, 1 figure
Η εμπράγματη ασφάλεια στο βυζαντινό δίκαιο (ιδίως οι σχέσεις μεταξύ περισσότερων ενεχυρούχων δανειστών)
Creators: name: Μόσχου, Ηλίας Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Εμπράγματη ασφάλεια
Βυζαντινό Δίκαιο
Ενέχυρο/Υποθήκη
Real security
Byzantine Law
Pledge/Mortgage

description: Σκοπός της εργασίας είναι η παρουσίαση των νομοθετικών ρυθμίσεων της εμπράγματης ασφάλειας στο βυζαντινό δίκαιο και της εφαρμογής τους από τα βυζαντινά δικαστήρια. Το ζήτημα τίθεται με αφορμή τους προβληματισμούς που δημιουργεί μια δικαστική απόφαση που περιέχεται στην Πείρα Ευσταθίου του Ρωμαίου, που αφορά τη σειρά ικανοποίησης περισσότερων ενυπόθηκων δανειστών. Στo πρώτο κεφάλαιο γίνεται μια σύντομη επισκόπηση των κανόνων του ρωμαϊκού δικαίου σχετικά με την εμπράγματη ασφάλεια. Στα επόμενα κεφάλαια παρουσιάζονται αναλυτικά οι βυζαντινές νομοθετικές ρυθμίσεις για την εμπράγματη ασφάλεια με έμφαση στη νομοθεσία του Ιουστινιανού, των Ισαύρων και των Μακεδόνων αυτοκρατόρων και στην Εξάβιβλο του Αρμενόπουλου. Ένα άλλο θέμα που θίγεται είναι ερμηνεία που δινόταν στη νομοθεσία από τους βυζαντινούς νομομαθείς και η επίδραση της ερμηνείας αυτής στην περαιτέρω εξέλιξη της νομοθεσίας και στη δικαστηριακή πράξη. Με βάση τα πορίσματα της ανάπτυξης που προηγήθηκε, επιχειρείται η έρευνα για το δίκαιο που εφάρμοσε η απόφαση της Πείρας. Επιπλέον παρακολουθείται η εξέλιξη της νομολογίας για την εμπράγματη ασφάλεια μέσω της παρουσίασης αποφάσεων του Πατριαρχικού δικαστηρίου της Κωνσταντινούπολης στην υστεροβυζαντινή εποχή. Στο τέλος της εργασίας γίνεται μια κριτική αποτίμηση της νομοθεσίας για την εμπράγματη ασφάλεια και της εφαρμογής της στη δικαστηριακή πράξη.
description: Τhe aim of the dissertation is to present the legislation about real security in Byzantine law and its application by the Byzantine courts. The question rises from a judicial decision contained in the Peira of Eustathius the Roman, concerning the order by which the claims of several creditors holding pledges are settled. In the first chapter there is a brief overview of the rules of Roman law on real security. In the next chapters the Byzantine regulations for real security are presented in detail with emphasis on the laws of Justinian, Isaurian and Macedonian emperors and in the Hexabiblos law book of Armenopoulos. Another issue raised is the interpretation that was given in legislation by Byzantine jurists and the effect of that interpretation in the further development of legislation and in judicial practice. Taking into account the analysis that preceded, it is then attempted to reconstruct the law applied by the decision in Peira. Moreover the development of jurisprudence for real security is monitored by presenting decisions of the Patriarchical court in Constantinople in the late Byzantine era. The essay is completed by an assessment of real security legislation and its practical judicial application.
Problems in the derivations of the renormalization group equation for the low momentum nucleon interactions
Creators: name: Harada, Koji
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We carefully examine all the four derivations of the renormalization group equation (RGE) for the so-called $\Vlk$ potential, given by Bogner, \textit{et. al.}[nucl-th/0111042]. Two derivations based on the ``semi-group composition law'' are shown to be unjustified, while the other two based on the completeness relation of the model space must be modified if there are bound states. It is however shown that the RGE is unchanged if the bound state wavefunctions in the reduced theory are required to have the same low-momentum components as those in the original theory. Several aspects of the $\Vlk$ approach are also discussed.
description: 16 pages, no figure; (ver.3) A significant revision is made; the condition under which the extra terms in the RGE cancel is clarified (ver.4) some expressions modified; it is emphasized that the numerical works in the literature are not affected by this paper
Four Billion Year Stability of the Earth-Mars Belt
Creators: name: Huang, Yukun
name: Gladman, Brett
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Previous work has demonstrated orbital stability for 100 Myr of initially near-circular and coplanar small bodies in a region termed the 'Earth-Mars belt' from 1.08 au $< a
description: 8 pages, 4 figures. Accepted for publication in MNRAS
Use of upper bound delay estimate in stability analysis and robust control compensation in networked control systems
Creators: name: Georges, Jean-Philippe
name: Vatanski, Nikolai
name: Rondeau, Eric
name: Jounela, Sirkka-Liisa Jämsä
Publisher: name: arXiv
Year: 2006
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Recent interest in networked control systems (NCS) has instigated research in various areas of both communication networks and control. The analysis of NCS has often been performed either from the network, or the control point of view and not many papers exist were the analysis of both is done in the same context. Here a simple overall analysis is presented. In the paper the procedure of obtaining the upper bound delay value in the switched Ethernet network is proposed and the obtained delay estimate is used in stability analysis of the feedback loop and in the control compensation. The upper bound delay algorithm is based on the network calculus theory, the stability analysis uses the small gain theorem, and control compensating strategy is based on Smith predictor, where however the upper bound delay is utilised in obtaining the delay estimate.
description: 6 pages
Generation of magnetic field by dynamo action in a turbulent flow of liquid sodium
Creators: name: Monchaux, R.
name: Berhanu, M.
name: Bourgoin, M.
name: Moulin, M.
name: Odier, Ph.
name: Pinton, J. -F.
name: Volk, R.
name: Fauve, S.
name: Mordant, N.
name: Petrelis, F.
name: Chiffaudel, A.
name: Daviaud, F.
name: Dubrulle, B.
name: Gasquet, C.
name: Marie, L.
name: Ravelet, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We report the observation of dynamo action in the VKS experiment, i.e., the generation of magnetic field by a strongly turbulent swirling flow of liquid sodium. Both mean and fluctuating parts of the field are studied. The dynamo threshold corresponds to a magnetic Reynolds number Rm \sim 30. A mean magnetic field of order 40 G is observed 30% above threshold at the flow lateral boundary. The rms fluctuations are larger than the corresponding mean value for two of the components. The scaling of the mean square magnetic field is compared to a prediction previously made for high Reynolds number flows.
description: 4 pages, 5 figures
Post-selection Inference in Regression Models for Group Testing Data
Creators: name: Shen, Qinyan
name: Gregory, Karl
name: Huang, Xianzheng
Publisher: name: arXiv
Year: 2025
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: We develop methodology for valid inference after variable selection in logistic regression when the responses are partially observed, that is, when one observes a set of error-prone testing outcomes instead of the true values of the responses. Aiming at selecting important covariates while accounting for missing information in the response data, we apply the expectation-maximization algorithm to compute maximum likelihood estimators subject to LASSO penalization. Subsequent to variable selection, we make inferences on the selected covariate effects by extending post-selection inference methodology based on the polyhedral lemma. Empirical evidence from our extensive simulation study suggests that our post-selection inference results are more reliable than those from naive inference methods that use the same data to perform variable selection and inference without adjusting for variable selection.
Valeurs algebriques de fonctions transcendantes
Creators: name: Surroca, Andrea
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11J81; 11J25

description: We study the set of algebraic numbers of bounded height and bounded degree where an analytic transcendental function takes algebraic values.
description: 25 pages; to appear in International Mathematics Research Notices
Smarter Password Guessing Techniques Leveraging Contextual Information and OSINT
Creators: name: Kanta, Aikaterini
name: Coisel, Iwen
name: Scanlon, Mark
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: In recent decades, criminals have increasingly used the web to research, assist and perpetrate criminal behaviour. One of the most important ways in which law enforcement can battle this growing trend is through accessing pertinent information about suspects in a timely manner. A significant hindrance to this is the difficulty of accessing any system a suspect uses that requires authentication via password. Password guessing techniques generally consider common user behaviour while generating their passwords, as well as the password policy in place. Such techniques can offer a modest success rate considering a large/average population. However, they tend to fail when focusing on a single target -- especially when the latter is an educated user taking precautions as a savvy criminal would be expected to do. Open Source Intelligence is being increasingly leveraged by Law Enforcement in order to gain useful information about a suspect, but very little is currently being done to integrate this knowledge in an automated way within password cracking. The purpose of this research is to delve into the techniques that enable the gathering of the necessary context about a suspect and find ways to leverage this information within password guessing techniques.
Hopf solitons and Hopf Q-balls on S^3
Creators: name: Sanchez-Guillen, J.
name: Adam, C.
name: Wereszczynski, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Field theories with a $S^2$-valued unit vector field living on $S^3 \times \RR$ space-time are investigated. The corresponding eikonal equation, which is known to provide an integrable sector for various sigma models in different spaces, is solved giving static as well as time-dependent multiply knotted configurations on $S^3$ with arbitrary values of the Hopf index. Using these results, we then find a set of hopfions with topological charge $Q_H=m^2$, $m \in \mathbf{Z}$, in the integrable subsector of the pure $CP^1$ model. In addition, we show that the $CP^1$ model with a potential term provides time-dependent solitons. In the case of the so-called "new baby Skyrme" potential we find, e.g., exact stationary hopfions, i.e., topological $Q$-balls. Our results further enable us to construct exact static and stationary Hopf solitons in the Faddeev--Niemi model with or without the new baby Skyrme potential. Generalizations for a large class of models are also discussed.
description: 26 pages
Parametrization of the surface energy in the ETF approximation
Creators: name: Furtado, Ubiratãn José
name: Gulminelli, Francesca
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We perform extended Thomas-Fermi calculations in the Wigner-Seitz cell below and above neutron drip with realistic functionals. The resulting energy density is decomposed as a sum of bulk terms and a surface term, and a compressible liquid drop analytical formula is used to fit the surface tension. The effect of curvature terms and neutron skin is studied in detail. A very good reproduction of the microscopic data is obtained using an expression that depends only on the mass and charge of the cluster, showing that the in-medium modifications of the nuclear energy in the presence of an external neutron gas can be effectively accounted for in the isospin dependence of the surface tension. In this first application, aimed at establishing the fitting protocol, we concentrate on the Sly4 energy functional, but the study can be easily generalized to different functionals, and the resulting parametrizations can be used for direct applications in pasta calculations in neutron star crusts and supernova matter.
description: 44 pages, 17 figures, 5 tables
KASBGA YO'NALTIRILGAN CHET TILLARNI O'QITISH MAQSAD VA VAZIFALARI
Creators: name: Khazratova Kunduz Mamaraimovna, English teacher of the Uzbekistan State World Languages University, TTU Tashkent
Publisher: name: Zenodo
Year: 2024

description: The article is devoted to the issues of using the possibilities of a foreign language in the educational process, the tasks of professionally oriented teaching of foreign languages are considered. The analysis of the methodological literature on this issue shows that there is an increased interest in the methods of teaching communication activities, the formation of listening and speaking skills in students.

Key words: foreign language, teaching methods, using modern technology, interactive learning methods
Global Compton heating and cooling in hot accretion flows
Creators: name: Yuan, Feng
name: Xie, Fuguo
name: Ostriker, Jeremiah P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The hot accretion flow is usually optically thin in the radial direction, therefore the photons produced at one radius can travel for a long distance without being absorbed. These photons thus can heat or cool electrons at other radii via Compton scattering. This effect has been ignored in most previous works on hot accretion flows and is the focus of this paper. If the mass accretion rate is described by $\dot{M}=\dot{M}_0(r/r_{\rm out})^{0.3}$ and $r_{\rm out}=10^4r_{\rm s}$, we find that the Compton scattering will play a cooling and heating role at $r\la 5\times 10^3 r_{\rm s}$ and $r\ga 5\times 10^3 r_{\rm s}$, respectively. Specifically, when $\dot{M}_0>0.1L_{\rm Edd}/c^2$, the Compton cooling rate is larger than the local viscous heating rate at certain radius; therefore the cooling effect is important. When $\dot{M}_0>2L_{\rm Edd}/c^2$, the heating effect at $r_{\rm out}$ is important. We can obtain the self-consistent steady solution with the global Compton effect included only if $\dot{M}_0\la L_{\rm Edd}/c^2$ for $r_{\rm out}=50r_{\rm s}$, which corresponds to $L\la 0.02L_{\rm Edd}$. Above this rate the Compton cooling is so strong at the inner region that hot solutions can not exist. On the other hand, for $r_{\rm out}= 10^5r_{\rm s}$, we can only get the self-consistent solution when $\dot{M}_0\la L_{\rm Edd}/c^2$ and $L<0.01L_{\rm Edd}$. Above this accretion rate the equilibrium temperature of electrons at $r_{\rm out}$ is higher than the virial temperature as a result of strong Compton heating, so the accretion is suppressed. In this case the activity of the black hole will likely "oscillate" between an active and an inactive phases, with the oscillation timescale being the radiative timescale of the gas at $r_{\rm out}$.
description: 7 pages, 3 figures; accepted by ApJ