cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Electronic Structure of LiMnO$_{2}$: A Comparative Study of the LSDA and LSDA+U methods
Creators: name: Shukla, Nitya Nath
name: Prasad, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A first-principles electronic structure study of orthorhombic, monoclinic and rhombohedral LiMnO$_{2}$ has been carried out using the full-potential linearized augmented plane-wave method. The exchange and correlations have been treated within the local spin-density approximation (LSDA) and the LSDA+U methods. In the LSDA, the stable ground state is antiferromagnetic insulator for the orthorhombic and monoclinic structures but is ferromagnetic metal for the rhombohedral structure. The LSDA+U, on the other hand, predicts the ground state to be an antiferromagnetic insulator for all structures. We find that strong correlations change the density of states dramatically around the Fermi level. The LSDA+U predicts the nature of band gap to be a mixture of charge transfer and Mn $d \leftrightarrow d$ like excitations for orthorhombic and monoclinic LiMnO$_{2}$ and Mott-insulator for rhombohedral LiMnO$_{2}$ in agreement with the available experimental results. The inclusion of U increases the magnetic moment on Mn and gives a value in better agreement with experiment. However, Mn valency is not affected by the inclusion of U. We have also calculated X-ray emission photoelectron spectra for the orthorhombic and monoclinic LiMnO$_{2}$ by the LSDA and the LSDA+U methods. We find that LSDA+U gives better agreement with the available experimental results.
description: 18 pages, 7 figures
Population Synthesis Studies of Close Binary Systems Using a Variable Common Envelope Efficiency Parameter: I. Dependence upon Secondary Mass
Creators: name: Politano, Michael
name: Weiler, Kevin P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We perform population synthesis calculations of present-day post common envelope binaries (PCEBs) and zero-age cataclysmic variables (ZACVs) using a common envelope efficiency parameter, alphaCE, that is a function of secondary mass, Ms. We investigate three basic possibilities: (1) a standard constant alphaCE prescription, with alphaCE = 1.0, 0.6, 0.3, 0.2, 0.1 and 0.05, to provide a baseline for comparison, (2) a power law dependence, alphaCE = (Ms)^n, with n = 0.5, 1.0 and 2.0, and (3) a dependence in which alphaCE approaches1 for large secondary masses and alphaCE = 0 below some assumed cutoff mass, alphaCE = 1 - Mcut/Ms, where Mcut is the cutoff mass and is equal to 0.0375, 0.075 and 0.15 solar mass. For each population, we compute orbital period, orbital separation, white dwarf mass and secondary mass distributions. We find that if alphaCE is less than ~0.2 in our constant alphaCE sequence, the predicted present-day ZACV population is significantly modified compared with our standard model (alphaCE = 1.0). In our variable alphaCE sequences for ZACVs, we find that for models in which alphaCE decreases very rapidly for small secondary masses, the orbital period distribution below the period gap differs significantly from our standard model. These differences are most evident in our power law sequence model with n = 2 and in our cutoff mass sequence model with Mcut = 0.15 solar mass. In these two models, the fraction of CVs forming with orbital periods below the gap is reduced significantly, the fraction forming in the gap is increased significantly, and both the short-period peak and the minimum period in the ZACV orbital period distribution shift to considerably longer orbital periods compared with our standard model.
description: 43 pages, 10 figures, 3 tables An error was found in the calculations; version 2 contains the revised manuscript with the corrections. This version has been acccepted and should be the one you download
In-plane anisotropy of the electronic structure for the charge/orbital-ordered state in half-doped manganite with layered structure
Creators: name: Lee, Y. S.
name: Onoda, S.
name: Arima, T.
name: Tokunaga, Y.
name: He, J. P.
name: Kaneko, Y.
name: Nagaosa, N.
name: Tokura, Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report on the in-plane anisotropy of the electronic response in the spin/charge/orbital ordered phase of a half-doped layered-structure manganite. The optical conductivity spectra for a single domain of Eu$_{1/2}$% Ca$_{3/2}$MnO$_{4}$ unambiguously show the anisotropic charge dynamics which well corresponds to the theoretical calculation: the optical conductivity with the polarization along the zigzag ferromagnetic chain direction exhibits a smaller gap and a larger intensity at lower energies than that of the perpendicular polarization mostly due to the charge/orbital ordering and the associated quantum interference effect.
description: 4 pages, 3 figures
Unbinned Angular Analysis of $B\to D^*\ell ν_\ell$ and the Right-handed Current
Creators: name: Huang, Zhuo-Ran
name: Kou, Emi
name: Lü, Cai-Dian
name: Tang, Ru-Ying
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this article, we perform a sensitivity study of an unbinned angular analysis of the $B\to D^*\ell ν_\ell$ decay, including the contributions from the right-handed current. We show that the angular observable can constrain very strongly the right-handed current without the intervention of the yet unsolved $V_{cb}$ puzzle.
description: 7 pages,2 figures; version accepted by PRD
Passives in Mandarin Chinese
Creators: name: Li, Erica Wen
Publisher: name: University of British Columbia
Year: 2009

description: This thesis examines the syntactic properties of passive constructions in Mandarin Chinese within the framework of Government and Binding. The theoretical framework of analyzing passives is that of Baker, Johnson and Roberts (1989, henceforth BJR) and Hale and Keyser (1993). It is argued that what could be and should be analyzed as a passive in Mandarin Chinese is the construction characterized by the presence of bei, hence the so- called Jbei-construct ion. I further argue that this passive construction is derived by NP-movement, as is the case with English. I maintain BJR's proposal that Agent is always present in passives, be it null or overt. However, Chinese differs from English in that the overt NP is never realized as an adjunct, unlike the by NP phrase in English. A second goal of this thesis is to address the issue of what classes of verbs are eligible for passivization in Mandarin Chinese. I propose that by adopting the model of argument structure by Hale and Keyser (1993), and in particular, the idea that thematic structure of a predicate is represented syntactically in the lexicon, we can explain why passivization is restricted to certain transitive predicates. By proposing that the NP in [Spec VP] position is the target for passivization, the semantic notion of affected argument is captured syntactically.
Το δικαίωμα της θρησκευτικής ελευθερίας στο νομικό πλαίσιο λειτουργίας των ενόπλων δυνάμεων της ευρωπαϊκής ένωσης
Creators: name: Μπλάγας, Ιωάννης Βίκτωρος
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Ένοπλες δυνάμεις
Θρησκευτική ελευθερία
Ποιμαντική φροντίδα
armed forces
religious freedom
pastoral care

description: Η μεταπτυχιακή αυτή εργασία, αναφέρεται στο θέμα της θρησκευτικής ελευθερίας, τόσο στις ελληνικές ένοπλες δυνάμεις, όσο και στις ένοπλες δυνάμεις άλλων 19 ευρωπαϊκών χωρών. Μέσα από στοιχεία που παρατίθενται, γίνεται γνωστό ποια είναι τα δικαιώματα και οι υποχρεώσεις των στρατιωτών που ασπάζονται διαφορετική θρησκεία, από την επικρατούσα θρησκεία του κράτους στο οποίο υπηρετούν τη στρατιωτική τους θητεία. Επίσης, γίνεται ιδιαίτερος λόγος για την ποιμαντική φροντίδα στις ελληνικές ένοπλες δυνάμεις, αλλά και στον τρόπο που είναι οργανωμένο το σώμα των στρατιωτικών ιερέων στην Ελλάδα.
description: This master thesis, addresses the issue of religious freedom, both in the Greek armed forces, and the armed forces of other 19 European countries. Through data presented, it has been known what are the rights and obligations of the soldiers who believe in different religion, of the dominant religion of the state in which they serve their military service. Also, this project refer to the pastoral care of the Greek armed forces, but also in witch way it is organized the service of military priests in Greece.
Broadband dielectric microwave microscopy on $μ$m length scales
Creators: name: Tselev, Alexander
name: Anlage, Steven M.
name: Ma, Zhengkun
name: Melngailis, John
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We demonstrate that a near-field microwave microscope based on a transmission line resonator allows imaging in a substantially wide range of frequencies, so that the microscope properties approach those of a spatially-resolved impedance analyzer. In the case of an electric probe, the broadband imaging can be used in a direct fashion to separate contributions from capacitive and resistive properties of a sample at length scales on the order of one micron. Using a microwave near-field microscope based on a transmission line resonator we imaged the local dielectric properties of a Focused Ion Beam (FIB) milled structure on a high-dielectric-constant Ba_{0.6}Sr_{0.4}TiO_3 (BSTO) thin film in the frequency range from 1.3 GHz to 17.4 GHz. The electrostatic approximation breaks down already at frequencies above ~10 GHz for the probe geometry used, and a full-wave analysis is necessary to obtain qualitative information from the images.
description: 19 pages (preprint format), 5 figures; to be published in Review of Scientific Instruments
Το Οθωμανικό Λουτρό του Γαζή Εβρενός στα Γιαννιτσά: μελέτη αποκατάστασης και επανάχρησης
Creators: name: Μουζά, Βασιλική Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Λουτρό
Εβρενός
Γιαννιτσά
Bath
Evrenos
Giannitsa

description: Το Χαμάμ του Γαζή Εβρενός στα Γιαννιτσά χρονολογείται στα τέλη του 14ου αιώνα και αποτελεί διπλό χαμάμ με ξεχωριστές εισόδους για άντρες και γυναίκες, με χλιαρά και ζεστά δωμάτια, όπως και αίθουσες αποδυτηρίων. Η μελέτη του ακολούθησε τα ενδεδειγμένα στάδια που ορίζονται για την προστασία όλων των μνημείων. Αρχικά, το στάδιο της ιστορικής τεκμηρίωσης, στο οποίο αναζητήθηκαν γραπτές πηγές και αρχειακό εικονο-γραφικό υλικό και η βιβλιογραφική μελέτη για τον κτιριακό τύπο των λουτρών της εποχής. Στη συνέχεια, έγινε πλήρης αποτύπωση του κτιρίου σε αρχιτεκτονικά σχέδια, ώστε να διερευνηθούν οι κατασκευαστικές μέθοδοι και τα υλικά, να εντοπιστούν οι ιστορικές φάσεις και οι μεταγενέστερες επεμβάσεις και η παθολογία της σημερινής κατάστασης στην οποία βρίσκεται. Με βάση τα συμπεράσματα της ανάλυσης τεκμηρίωσης, ακολούθησε η πρόταση αποκατάστασης με τις προτεινόμενες επεμβάσεις στο κτίριο, ώστε να αναδειχθεί η αρχιτεκτονική του κτιρίου και να αντιμετωπιστούν τα προβλήματα απώλειας του κελύφους. Επίσης, η ένταξη μιας νέας χρήσης κρίθηκε απαραίτητη, ώστε να διασφαλιστεί η διατήρηση του μνημείου στο μέλλον και να επανατεθεί σε λειτουργία προς όφελος της κοινωνίας. Τέλος, η μελέτη του εντάχθηκε στο γενικότερο πλαίσιο της διατήρησης και ανάδειξης των σωζόμενων οθωμανικών μνημείων των Γιαννιτσών, που αποτελούν σημαντικές μαρτυρίες της ιστορίας της πόλης.
description: The Bath of Gazi Evrenos in Giannitsa dates from the end of the 14th century and forms a double hamam with separate entrances for men and women, warm and hot rooms, as well as changing rooms. The Bath’s study complied with the recommendable stages determined for the protection of monuments. Initially, at the stage of historical documentation, the written references, the pictorial archive material and the bibliography, regarding the building type of baths at that period, were quested. Consequently, a complete survey of the building into architectural drawings was composed, in order to study the methods of construction and the materials, to trace the historical phases and the later interventions as well as the pathology of the existing condition. Based on the results of the documentation review, the restoration proposal and suggested interventions followed, in order to highlight the building’s architecture and encounter the loss of the building’s shell. Moreover, a reuse is considered to be necessary, for the purpose of insuring the future conservation and operation of the monument, in the interests of the local community. Lastly, the building’s study was integrated in the general frame of the conservation of the existing ottoman monuments in Giannitsa, that constitute a tribute to the history of the town.
Jensen's inequality for conditional expectations
Creators: name: Hansen, Frank
Publisher: name: arXiv
Year: 2006
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 47A63; 26A51

description: We study conditional expectations generated by an abelian $ C^* $-subalgebra in the centralizer of a positive functional. We formulate and prove Jensen's inequality for functions of several variables with respect to this type of conditional expectations, and we obtain as a corollary Jensen's inequality for expectation values.
q-breathers in finite two- and three-dimensional nonlinear acoustic lattices
Creators: name: Ivanchenko, M. V.
name: Kanakov, O. I.
name: Mishagin, K. G.
name: Flach, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Nonlinear interaction between normal modes dramatically affects energy equipartition, heat conduction and other fundamental processes in extended systems. In their celebrated experiment Fermi, Pasta and Ulam (FPU, 1955) observed that in simple one-dimensional nonlinear atomic chains the energy must not always be equally shared among the modes. Recently, it was shown that exact and stable time-periodic orbits, coined $q$-breathers (QBs), localize the mode energy in normal mode space in an exponential way, and account for many aspects of the FPU problem. Here we take the problem into more physically important cases of two- and three-dimensional acoustic lattices to find existence and principally different features of QBs. By use of perturbation theory and numerical calculations we obtain that the localization and stability of QBs is enhanced with increasing system size in higher lattice dimensions opposite to their one-dimensional analogues.
description: 4 pages, 5 figures
Shapley Counterfactual Credits for Multi-Agent Reinforcement Learning
Creators: name: Li, Jiahui
name: Kuang, Kun
name: Wang, Baoxiang
name: Liu, Furui
name: Chen, Long
name: Wu, Fei
name: Xiao, Jun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Centralized Training with Decentralized Execution (CTDE) has been a popular paradigm in cooperative Multi-Agent Reinforcement Learning (MARL) settings and is widely used in many real applications. One of the major challenges in the training process is credit assignment, which aims to deduce the contributions of each agent according to the global rewards. Existing credit assignment methods focus on either decomposing the joint value function into individual value functions or measuring the impact of local observations and actions on the global value function. These approaches lack a thorough consideration of the complicated interactions among multiple agents, leading to an unsuitable assignment of credit and subsequently mediocre results on MARL. We propose Shapley Counterfactual Credit Assignment, a novel method for explicit credit assignment which accounts for the coalition of agents. Specifically, Shapley Value and its desired properties are leveraged in deep MARL to credit any combinations of agents, which grants us the capability to estimate the individual credit for each agent. Despite this capability, the main technical difficulty lies in the computational complexity of Shapley Value who grows factorially as the number of agents. We instead utilize an approximation method via Monte Carlo sampling, which reduces the sample complexity while maintaining its effectiveness. We evaluate our method on StarCraft II benchmarks across different scenarios. Our method outperforms existing cooperative MARL algorithms significantly and achieves the state-of-the-art, with especially large margins on tasks with more severe difficulties.
What's stopping sustainability?: examining the barriers to implementation of clouds of change
Creators: name: Moore, Jennie Lynn
Publisher: name: University of British Columbia
Year: 2009

description: Despite understanding the need to become sustainable, and knowing some of the actions required to reach this end, barriers exist that prevent individuals, and society, from adopting actions that support sustainability. To understand what some of these barriers are, the case of Vancouver's attempt to implement the 1990 Clouds of Change recommendations has been analysed. Councillors, civic staff, Task Force on Atmospheric Change members and citizens who participated in the Task Force's public participation process were asked to identify what they perceived as the barriers to action-taking by the City to implement the recommendations. Fifty-eight people were interviewed. The barriers identified fell within three categories: Perceptual/Behavioural, Institutional/Structural and Economic/Financial. Analysis reveals how the barriers functioned, which ones were perceived as causing the greatest impediment to implementation of the recommendations, what conditions facilitated implementation of some recommendations, and suggestions regarding how some barriers may be overcome in the future. The six most commonly cited barriers were: lack of understanding about the issues, perceived lack of empowerment, competing issues, inadequate funds, fear of losing constituent support and limitation of jurisdiction. Other important barriers were: differences in perception, inappropriate structure of government (vertical), weak linkages among the policies of civic and senior levels of government and weak communication linkages between government and its constituents. Many of the barriers identified contributed to a low degree of civic participation in the City. Suggestions for improving government effectiveness, in terms of its ability to implement the Clouds of Change recommendations focussed on ways of improving civic participation among citizens. Suggestions regarding the amendment of government structures and decision-making processes are also presented.
Αξιολόγηση του σχολικού βιβλίου αγγλικών της δ΄ δημοτικού
Creators: name: Κεσίδου, Ευγενία Αιμίλιου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Αξιολόγηση σχολικού βιβλίου
Αγγλικά δημοτικού
Ξένη γλώσσα στην Πρωτοβάθμια εκπαίδευση
School textbook evaluation
English in primary grades
Foreign language in Primary education

description: Το σχολικό βιβλίο αποτελεί, αφενός, ένα μέσο πολιτικό, πληροφοριακό και παιδαγωγικό ενώ, αφετέρου, ο ρόλος του είναι κεντρικός στη διδασκαλία και στη μάθηση. Σκοπός της παρούσας έρευνας, λοιπόν, είναι η αξιολόγηση του σχολικού βιβλίου των αγγλικών της δ’ δημοτικού σχολείου σε μια προσπάθεια ολόπλευρης ποιοτικής ανάλυσής του. Έτσι, ελέγχονται η εξωτερική εμφάνιση, τα δομικά και τεχνικά χαρακτηριστικά του, η παιδαγωγική καταλληλότητα αυτού και η σύνδεσή του με την επιστήμη της Αγωγής, η διδακτική και μεθοδολογική του καταλληλότητα, η σχέση του σχολικού βιβλίου με την επιστήμη αναφοράς αλλά και το πρόγραμμα σπουδών και τέλος, η συσχέτιση του βιβλίου με την κοινωνία και την ευρύτερη κοινωνική πραγματικότητα.
description: The school textbook can be act as a reference book which bears information on a specific subject (Informatorium) as well as political ideology and pedagogical thought (Politicum et Peadegogicum). Moreover, its role is prominent throughout the teaching and learning procedure. The main purpose of this research paper is the evaluation of the English textbook taught in the 4th grade of Greek Primary School with the aim of an overall, qualitative analysis of it. As a consequence, its main features and contents are analyzed on the basis of the principles of Pedagogy, Educational science, Methodology of Teaching English as a Foreign Language as well as the National Curriculum in order to examine whether this material is appropriate for teaching English in primary grades. Finally, the role of this schoolbook in the socialization of students is, also, studied.
On the cohomology algebra of some classes of geometrically formal manifolds
Creators: name: Grosjean, Jean-Francois
name: Nagy, Paul-Andi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C12, 53C24, 53C55

description: We investigate harmonic forms of geometrically formal metrics, which are defined as those having the exterior product of any two harmonic forms still harmonic. We prove that a formal Sasakian metric can exist only on a real cohomology sphere and that holomorphic forms of a formal Kähler metric are parallel w.r.t. the Levi-Civita connection. In the general Riemannian case a formal metric with maximal second Betti number is shown to be flat. Finally we prove that a six-dimensional manifold with $b_1 \neq 1, b_2 \geqslant 2$ and not having the cohomology algebra of $\mathbb{T}^3 \times S^3$ carries a symplectic structure as soon as it admits a formal metric.
description: Final version. Accepted in Proc.London Math.Soc
Η ασθενής ψυχή κατά τον Ιπποκράτη, Πλάτωνα και Αριστοτέλη
Creators: name: Κατσιούλης, Ευάγγελος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Ιπποκράτης
Πλάτωνας
Αριστοτέλης
Hippocrates
Plato
Aristotle

description: Σκοπός της διατριβής ήταν η μελέτη των θέσεων τριών κορυφαίων εκφραστών του αρχαίου ελληνικού πνεύματος για την ασθενή ψυχή. Εξετάσαμε την ορολογία που χρησιμοποιείται για τις διάφορες καταστάσεις ασθενούς ψυχής και τους ορισμούς που έχουν προταθεί. Στην συνέχεια παρουσιάσαμε αναλυτικά τα χαρακτηριστικά των ποικίλων καταστάσεων ασθενούς ψυχής, τις ποικίλες κλινικές εικόνες αυτών, καθώς και τους αναφερόμενους παθογενετικούς μηχανισμούς που υπεισέρχονται σε κάθε περίπτωση στη βάση της ποιοτικής και ποσοτικής σύστασης των χυμών του ανθρώπου. Ακόμη αναφερθήκαμε αναλυτικά στα προτεινόμενα μοντέλα κατανόησης των καταστάσεων ασθένειας της ψυχής και μας απασχόλησε η αιτιολογική προσέγγιση κάθε κατάστασης ασθενούς ψυχής. Ένα άλλο θέμα που θίξαμε ήταν η συγκριτική παρουσίαση και σχολιασμός των θέσεων των τριών ερευνητών για την ασθενή ψυχή. Ασχοληθήκαμε επιπλέον με την χρονική και ιστορική εξέλιξη των θέσεων περί ασθενούς ψυχής και διαπιστώσαμε την εγγύτητά τους με πολλές σύγχρονες προσεγγίσεις.
description: The aim of the present thesis was the study of the approaches of three exceptional representatives of the ancient Greek spirit about the sick soul. We examined the proposed terminology about the various presentations of the sick soul and the suggested definitions. Then we presented in detail the features of many presentations of the sick soul, the various clinical pictures of these presentations and the proposed causing mechanisms, which interfere with each presentation on the basis of the specific quality and quantity contents of human humes. Furthermore, we analyzed the models concerning the comprehension of the variety of sick soul presentations and we consider the understanding of the causing factors of each sick soul condition. We also examined the comparative presentation and commentary of the opinions of the three philosophers about sick soul. Another aim of this study was to examine the progressive and historical advancement of the thoughts on the sick soul and we confirmed their similarities with many current approaches.
Η αξιολόγηση επιμορφωτικών προγραμμάτων εκπαιδευτικών:
Creators: name: Δημοπούλου, Καλλιόπη Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Αξιολόγηση
Επιμόρφωση εκπαιδευτικών
Εκπαίδευση εκπαιδευτικών
Evaluation
Teachers’ training
Teachers’ education

description: Η παρούσα μελέτη με θέμα την αξιολόγηση επιμορφωτικών προγραμμάτων εκπαιδευτικών οργανώνεται σε τρία μέρη. Στο πρώτο σκιαγραφείται ο χαρακτήρας της σύγχρονης εκπαιδευτικής πραγματικότητας, καθώς αυτή είναι προσδιοριστικός παράγοντας της θέσης και του ρόλου των επιμορφωτικών προγραμμάτων στην εκπαιδευτική διαδικασία. Ακολούθως τεκμηριώνεται η αναγκαιότητα των επιμορφωτικών προγραμμάτων ως μια από τις κύριες συνιστώσες της εκπαιδευτικής δραστηριότητας. Στο δεύτερο μέρος, που αποτελεί και τον πυρήνα της εργασίας, η μελέτη εστιάζεται στο θέμα της αξιολόγησης των επιμορφωτικών προγραμμάτων. Μετά την εννοιολογική οριοθέτηση του όρου αξιολόγηση εξετάζονται οι διάφορες μορφές της αξιολόγησης, οι κλίμακες μέτρησης, οι στρατηγικές συλλογής δεδομένων, τα κριτήρια και τα μοντέλα αξιολόγησης, παράμετροι δηλαδή που συνιστούν τα κύρια δομικά στοιχεία στο σχεδιασμό και την υλοποίηση μιας έγκυρης και αξιόπιστης αξιολόγησης. Ιδιαίτερη αναφορά γίνεται στην ανάδειξη της διευρυμένης, σε σχέση με το παρελθόν, ευθύνης του αξιολογητή, καθώς και στη σημασία της μετα-αξιολόγησης, για τον έλεγχο της ορθότητας της όλης αξιολογικής διαδικασίας. Στο τρίτο, τέλος, μέρος, σε μια μεταφορά της θεωρίας στην πράξη, παρουσιάζεται ένα παράδειγμα αξιολόγησης επιμορφωτικού προγράμματος.
description: The present study on the evaluation of in-service teachers’ training is organised in three parts. In the first one, the nature of the current educational reality is outlined, as this is the determinant of the position and the role of training programs in the educational procedure. Furthermore, the necessity of training programs is presented as one of the principal components of the educational activity. In the second part, which constitutes the core of this study, there is a focus on the issue of the evaluation of in-service teachers’ training. After the conceptual definition of the term “evaluation”, the various forms of evaluation, the measurement scales, the data collection strategies, the criteria and the evaluation models are examined, i.e. parameters that constitute the key elements in the design and implementation of a valid and reliable evaluation. Particular attention is given to the expanded -compared to the past- responsibility of the evaluator and to the significance of the metaevaluation, for the control of the correctness of the entire evaluation process. Finally, in the third part there is a transfer of theory into practice, by which an example of the evaluation of a teachers’ training program is presented.
Additional file 1 of The relationship of publication language, study population, risk of bias, and treatment effects in acupuncture related systematic reviews: a meta-epidemiologic study
Creators: name: Li, Jing
name: Hui, Xu
name: Yao, Liang
name: Shi, Anya
name: Yan, Peijing
name: Yao, Yuan
name: Wang, Qi
name: Ma, Yanfang
name: Wei, Dang
name: Lan, Lei
name: Chen, Lingxiao
name: Yan, Lijiao
name: Fang, Fang
name: Li, Huijuan
name: Feng, Xiaowen
name: Wu, Jingxi
name: Qiao, Yifan
name: Zhang, Wenhao
name: Esill, Janne
name: Qiao, Chengdong
name: Yang, Kehu
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy

description: Supplementary Material 1
Quantum entanglement
Creators: name: Horodecki, Ryszard
name: Horodecki, Pawel
name: Horodecki, Michal
name: Horodecki, Karol
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: All our former experience with application of quantum theory seems to say: {\it what is predicted by quantum formalism must occur in laboratory}. But the essence of quantum formalism - entanglement, recognized by Einstein, Podolsky, Rosen and Schrödinger - waited over 70 years to enter to laboratories as a new resource as real as energy. This holistic property of compound quantum systems, which involves nonclassical correlations between subsystems, is a potential for many quantum processes, including ``canonical'' ones: quantum cryptography, quantum teleportation and dense coding. However, it appeared that this new resource is very complex and difficult to detect. Being usually fragile to environment, it is robust against conceptual and mathematical tools, the task of which is to decipher its rich structure. This article reviews basic aspects of entanglement including its characterization, detection, distillation and quantifying. In particular, the authors discuss various manifestations of entanglement via Bell inequalities, entropic inequalities, entanglement witnesses, quantum cryptography and point out some interrelations. They also discuss a basic role of entanglement in quantum communication within distant labs paradigm and stress some peculiarities such as irreversibility of entanglement manipulations including its extremal form - bound entanglement phenomenon. A basic role of entanglement witnesses in detection of entanglement is emphasized.
description: 110 pages, 3 figures, ReVTex4, Improved (slightly extended) presentation, updated references, minor changes, submitted to Rev. Mod. Phys.
First experimental search for production of magnetic monopoles via the Schwinger mechanism
Creators: name: Acharya, B.
name: Alexandre, J.
name: Benes, P.
name: Bergmann, B.
name: Bertolucci, S.
name: Bevan, A.
name: Branzas, H.
name: Burian, P.
name: Campbell, M.
name: Cho, Y. M.
name: de Montigny, M.
name: De Roeck, A.
name: Ellis, J. R.
name: Sawy, M. El
name: Fairbairn, M.
name: Felea, D.
name: Frank, M.
name: Gould, O.
name: Hays, J.
name: Hirt, A. M.
name: Ho, D. L. J.
name: Hung, P. Q.
name: Janecek, J.
name: Kalliokoski, M.
name: Korzenev, A.
name: Lacarrère, D. H.
name: Leroy, C.
name: Levi, G.
name: Lionti, A.
name: Maulik, A.
name: Margiotta, A.
name: Mauri, N.
name: Mavromatos, N. E.
name: Mermod, P.
name: Millward, L.
name: Mitsou, V. A.
name: Ostrovskiy, I.
name: Ouimet, P. -P.
name: Papavassiliou, J.
name: Parker, B.
name: Patrizii, L.
name: Păvălaş, G. E.
name: Pinfold, J. L.
name: Popa, L. A.
name: Popa, V.
name: Pozzato, M.
name: Pospisil, S.
name: Rajantie, A.
name: de Austri, R. Ruiz
name: Sahnoun, Z.
name: Sakellariadou, M.
name: Santra, A.
name: Sarkar, S.
name: Semenoff, G.
name: Shaa, A.
name: Sirri, G.
name: Sliwa, K.
name: Soluk, R.
name: Spurio, M.
name: Staelens, M.
name: Suk, M.
name: Tenti, M.
name: Togo, V.
name: Tuszyński, J. A.
name: Upreti, A.
name: Vento, V.
name: Vives, O.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Schwinger showed that electrically-charged particles can be produced in a strong electric field by quantum tunnelling through the Coulomb barrier. By electromagnetic duality, if magnetic monopoles (MMs) exist, they would be produced by the same mechanism in a sufficiently strong magnetic field. Unique advantages of the Schwinger mechanism are that its rate can be calculated using semiclassical techniques without relying on perturbation theory, and the finite MM size and strong MM-photon coupling are expected to enhance their production. Pb-Pb heavy-ion collisions at the LHC produce the strongest known magnetic fields in the current Universe, and this article presents the first search for MM production by the Schwinger mechanism. It was conducted by the MoEDAL experiment during the 5.02 TeV/nucleon heavy-ion run at the LHC in November 2018, during which the MoEDAL trapping detectors (MMTs) were exposed to 0.235 nb$^{-1}$ of Pb-Pb collisions. The MMTs were scanned for the presence of magnetic charge using a SQUID magnetometer. MMs with Dirac charges 1$g_D$ $\leq$ $g$ $\leq$ 3$g_D$ and masses up to 75 GeV/c$^2$ were excluded by the analysis. This provides the first lower mass limit for finite-size MMs from a collider search and significantly extends previous mass bounds.
description: Minor fixes to the authorship list found during production
The classification of 2-compact groups
Creators: name: Andersen, Kasper K. S.
name: Grodal, Jesper
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Topology (math.AT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: Primary: 55R35; Secondary: 55P35, 55R37

description: We prove that any connected 2-compact group is classified by its 2-adic root datum, and in particular the exotic 2-compact group DI(4), constructed by Dwyer-Wilkerson, is the only simple 2-compact group not arising as the 2-completion of a compact connected Lie group. Combined with our earlier work with Moeller and Viruel for p odd, this establishes the full classification of p-compact groups, stating that, up to isomorphism, there is a one-to-one correspondence between connected p-compact groups and root data over the p-adic integers. As a consequence we prove the maximal torus conjecture, giving a one-to-one correspondence between compact Lie groups and finite loop spaces admitting a maximal torus. Our proof is a general induction on the dimension of the group, which works for all primes. It refines the Andersen-Grodal-Moeller-Viruel methods to incorporate the theory of root data over the p-adic integers, as developed by Dwyer-Wilkerson and the authors, and we show that certain occurring obstructions vanish, by relating them to obstruction groups calculated by Jackowski-McClure-Oliver in the early 1990s.
description: 47 pages
title: Humanities doctoral education for a relational future
title: a Change Laboratory research intervention
titleType: Subtitle
Creators: name: Hasted, Catherine
Publisher: name: Lancaster University
Year: 2019

description: Pressure to change the design of the doctorate is increasing, causing a tension between a politically driven emphasis to prepare PhD researchers for mobility beyond academia and current, scholarship-oriented, practices of traditional doctoral education. Research typically advocates that doctoral students need support to mobilise their expertise across boundaries, but there is a paucity of empirical studies investigating how such support could be provided and how different aspects of the required expertise might be developed. In this thesis, I therefore seek to understand and intervene in the development of boundary crossing collaborations, focusing on developing the forms of expertise required to prepare students for a relational future. My analysis draws on data from an 8-month long Change Laboratory research-intervention, which brought humanities doctoral students from a university together with non-academic professionals working for a UK charity. Applying relational working as an analytical framework, I trace the extent to which common knowledge, relational expertise and relational agency developed over the course of the intervention and highlight aspects of the intervention design that were most influential on that development. The findings suggest that incorporating additional practitioners, external but connected to the host organisation’s activity system, stimulated the development of common knowledge. Additionally, introducing the mediating stimulus of an activity system model, which participants perceived to be a ‘neutral’ focus for discussion, supported relational applications of individual expertise. Furthermore, the shared responsibility for producing data encouraged throughout the intervention seemingly fostered the internal and external verification of researcher expertise. Overall, I propose that interventions of this kind have the potential to become a new pedagogic medium, the Relational Change Laboratory (RCL), whose aim is to stimulate accelerated reciprocal learning within humanities doctoral education. Such an intervention, I argue, can alter the boundary crossing practices and outcomes for both students and host organisations.
Testing the Bethe ansatz with large N renormalons
Creators: name: Marino, Marcos
name: Miravitllas, Ramon
name: Reis, Tomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The ground state energy of integrable asymptotically free theories can be conjecturally computed by using the Bethe ansatz, once the theory has been coupled to an external potential through a conserved charge. This leads to a precise prediction for the perturbative expansion of the energy. We provide a non-trivial test of this prediction in the non-linear sigma model and its supersymmetric extension, by calculating analytically the associated Feynman diagrams at next-to-leading order in the $1/N$ expansion, and at all loops. By investigating the large order behaviour of the diagrams, we locate the position of the renormalons of the theory and we obtain an analytic expression for the large $N$ trans-series associated to each. As a spin-off of our calculation, we provide a direct derivation of the beta function of these theories, at next-to-leading order in the $1/N$ expansion.
description: 39 pages, 8 figures
Study of Phonon Modes in Germanium Nanowires
Creators: name: Wang, Xi
name: Shakouri, Ali
name: Yu, Bin
name: Sun, Xuhui
name: Meyyappan, Meyya
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The observation of pure phonon confinement effect in germanium nanowires is limited due to the illumination sensitivity of Raman spectra. In this paper we measured Raman spectra for different size germanium nanowires with different excitation laser powers and wavelengths. By eliminating the local heating effect, the phonon confinement effect for small size nanowires was clearly identified. We have also fitted the Raman feature changes to estimate the size distribution of nanowires for the first time.
description: 11 pages,15 figures
Anomalous Electrodynamics and Quantum Geometry in the Dirac-Harper model for a Graphene Bilayer
Creators: name: Timmel, Abigail
name: Mele, E. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Graphene bilayers with layer antisymmetric strains are studied using the Dirac-Harper model for a pair of single layer Dirac Hamiltonians coupled by a one-dimensional moiré-periodic interlayer tunneling amplitude. This model hosts low energy, nearly dispersionless bands near charge neutrality that support anomalous polarizations of its charge multipole distributions. These are analyzed introducing a generalized Berry curvature that encodes the field-induced dynamics of multipole fields allowed in a chiral medium with time reversal symmetry. The formulation identifies a reciprocity relation between responses to layer-symmetric and layer-antisymmetric in-plane electric fields and reveals momentum-space quantum oscillations produced by a spatial pattern of band inversions on the moiré scale.
description: 11 pages, 10 figures
title: Automated testing and interactive construction of unavoidable sets for graph classes of small path‐width
Creators: name: Bachtler, Oliver
name: Heinrich, Irene
Publisher: name: Wiley
Year: 2024

description: Let G be a class of graphs with a membership test, k∈N , and let Gk be the class of graphs in G of path-width at most k. We present an interactive framework that finds an unavoidable set for Gk, which is a set of graphs U such that any graph in Gk contains an isomorphic copy of a graph in U. At the core of our framework is an algorithm that verifies whether a set of graphs is, indeed, unavoidable for Gk. While obstruction sets are well-studied, so far there is no general theory or algorithm for finding unavoidable sets. In general, it is undecidable whether a finite set of graphs is unavoidable for a given graph class. However, we give a criterion for termination: our algorithm terminates whenever G is locally checkable of bounded maximum degree and U is a finite set of connected graphs. For example, l-regular graphs, l-colourable graphs, and H-free graphs are locally checkable classes. We put special emphasis on the case that G is the class of cubic graphs and tailor the algorithm to this case. In particular, we introduce the new concept of high-degree-first path-decompositions, which enables highly efficient pruning techniques. We exploit our framework to prove a new lower bound on the path-width of cubic graphs. Moreover, we determine the extremal girth values of cubic graphs of path-width for all and all smallest graphs which take on these extremal girth values. Further, we present a new constructive characterisation of the extremal cubic graphs of path-width 3 and girth 4.
A structural approach to default modelling with pure jump processes
Creators: name: Aguilar, Jean-Philippe
name: Pesci, Nicolas
name: James, Victor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pricing of Securities (q-fin.PR)
subject: FOS: Economics and business
subject: 60E07, 60E10, 62P05, 91G30, 91G40

description: We present a general framework for the estimation of corporate default based on a firm's capital structure, when its assets are assumed to follow a pure jump Lévy processes; this setup provides a natural extension to usual default metrics defined in diffusion (log-normal) models, and allows to capture extreme market events such as sudden drops in asset prices, which are closely linked to default occurrence. Within this framework, we introduce several pure jump processes featuring negative jumps only and derive practical closed formulas for equity prices, which enable us to use a moment-based algorithm to calibrate the parameters from real market data and to estimate the associated default metrics. A notable feature of these models is the redistribution of credit risk towards shorter maturity: this constitutes an interesting improvement to diffusion models, which are known to underestimate short term default probabilities. We also provide extensions to a model featuring both positive and negative jumps and discuss qualitative and quantitative features of the results. For readers convenience, practical tools for model implementation and GitHub links are also included.
description: V3 (final version): correction of minor typos and bibliographical references
Multi-band study of NGC 7424 and its two newly-discovered ULXs
Creators: name: Soria, R.
name: Kuncic, Z.
name: Broderick, J. W.
name: Ryder, S. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have studied the face-on, barred spiral NGC 7424 (site of the rare Type IIb SN 2001ig) with Chandra, Gemini and the Australia Telescope Compact Array. After giving revised X-ray colours and luminosity of the supernova, here we focus on some other interesting sources in the galaxy: in particular, our serendipitous discovery of two ultraluminous X-ray sources (ULXs). The brighter one (~ 10^{40} erg/s) has a power-law-like spectrum with photon index Gamma ~ 1.8. The other ULX shows a spectral state transition or outburst between the two Chandra observations, 20 days apart. Optical data show that this ULX is located in a young (age ~ 7-10 Myr), bright complex rich with OB stars and clusters. An exceptionally bright, unresolved radio source (0.14 mJy at 4.79 GHz, implying a radio luminosity twice as high as Cas A) is found slightly offset from the ULX (~ 80 pc). Its radio spectral index alpha ~ -0.7 suggests optically-thin synchrotron emission, either from a young supernova remnant or from a radio lobe powered by a ULX jet. An even brighter, unresolved radio source (0.22 mJy at 4.79 GHz) is found in another young, massive stellar complex, not associated with any X-ray sources: based on its flatter radio spectral index (alpha ~ -0.3), we suggest that it is a young pulsar wind nebula, a factor of 10 more radio luminous than the Crab.
description: 12 pages, 11 figures. Accepted by MNRAS. High-resolution colour images of NGC 7424 from the Gemini observations are available at http://www.gemini.edu/2001igpr
Η επικοινωνία του σύγχρονου ελληνικού πρωτοβάθμιου σχολείου και αλλοδαπών οικογενειών: απόψεις εκπαιδευτικών πρωτοβάθμιας εκπαίδευσης για τη συνεργασία σχολείου – οικογένειας
Creators: name: Πέρου, Καλλιόπη Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Συνεργασία σχολείου–οικογένειας
Επικοινωνία μεταξύ σχολείου και αλλοδαπών οικογενειών
Διαπολιτισμική εκπαίδευση
Collaboration between school and foreign pupils’ families
Interaction between school and foreign pupils’ families
Intercultural education

description: Η παρούσα εργασία αποτελεί ποιοτική διερεύνηση των σχέσεων που αναπτύσσονται μεταξύ των εκπαιδευτικών της Πρωτοβάθμιας εκπαίδευσης και των αλλοδαπών γονέων των μαθητών τους στην Ελληνική κοινωνία και πραγματικότητα. Αφετηρία του προβληματισμού ήταν η διαπίστωση ότι το σχολείο και οικογένεια, ως οι πιο σημαντικοί θεσμοί κοινωνικοποίησης του νέου ανθρώπου, μοιράζονται κοινούς σκοπούς. Η έρευνα εστίασε στη διερεύνηση των παραγόντων που διαμορφώνουν το φαινόμενο της επικοινωνίας και συνεργασίας εκπαιδευτικών και γονέων στην Πρωτοβάθμια Εκπαίδευση, στην περιγραφή των μορφών που παίρνει, στις συνθήκες κάτω από τις οποίες πραγματοποιείται και στις αντιλήψεις εκπαιδευτικών και γονέων σχετικά με προοπτικές διεύρυνσης της μεταξύ τους επικοινωνίας και συνεργασίας. Βασική αρχή της ερευνητικής εργασίας αποτελεί η πεποίθηση ότι ένας γνήσιος δημοκρατικός και διαπολιτισμικός προσανατολισμός του πολυεθνικού ελληνικού σχολείου, δεν μπορεί να πραγματωθεί χωρίς τη μετεξέλιξη και διεύρυνση της παιδαγωγικής αλληλεπίδρασης και επικοινωνίας των εκπαιδευτικών με τους μαθητές τους, καθώς και με τις οικογένειες των μαθητών.
description: The current dissertation constitutes a qualitative research of the relations developing between the primary school teachers and the foreign pupils’ parents within the current Greek society. It derives from the acknowledgement that both school and family share common goals. The research focuses on the investigation of the factors which form both the communication and the collaboration between teachers and parents in Primary School, the description of its forms, the conditions on which it is held and the teachers’ beliefs in relation to the potential perspective of searching the in between communication and cooperation. The primary principle of the dissertation is the conviction that a genuine democratic and cross-cultural orientation of the multinational Greek school cannot be achieved without developing and broadening the educational interaction and communication between teachers and their pupils as well as their pupils’ families.
Stability and selective extinction in complex mutualistic networks
Creators: name: Lee, Hyun Woo
name: Lee, Jae Woo
name: Lee, Deok-Sun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We study species abundance in the empirical plant-pollinator mutualistic networks exhibiting broad degree distributions, with uniform intra-group competition assumed, by the Lotka-Volterra equation. The stability of a fixed point is found to be identified by the signs of its non-zero components and those of its neighboring fixed points. Taking the annealed approximation, we derive the non-zero components to be formulated in terms of degrees and the rescaled interaction strengths, which lead us to find different stable fixed points depending on parameters, and we obtain the phase diagram. The selective extinction phase finds small-degree species extinct and effective interaction reduced, maintaining stability and hindering the onset of instability. The non-zero minimum species abundances from different empirical networks show data collapse when rescaled as predicted theoretically.
description: 7 figures