cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Αμυντικός σχεδιασμός και πολεμική προπαρασκευή του καθεστώτος της 4ης Αυγούστου (1936-1940)
Creators: name: Πολύχρους, Γεώργιος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ελλάδα-Μεταξάς
Ελλάδα-Παπάγος
Greece-Metaxas
Greece-Papagos

description: Σκοπός της παρούσας διπλωματικής εργασίας είναι να εξετάσει τους βασικότερους τομείς του αμυντικού σχεδιασμού και της πολεμικής προπαρασκευής της Ελλάδος κατά την χρονική περίοδο 1936-1940. Η έρευνα βασίστηκε στο Αρχείο της Διεύθυνσης Ιστορίας Στρατού, το Αρχείο Ιωάννου Μεταξά (Γενικά Αρχεία του Κράτους), καθώς και σε πλήθος δημοσιευμένων πηγών και βιβλιογραφίας. Αρχικά, εξετάζονται οι επαφές της Ελλάδας με τους δυνητικούς συμμάχους της και οι προσπάθειες της να εξασφαλίσει εξωτερική βοήθεια σε ενδεχόμενο πολέμου. Στη συνέχεια παρουσιάζεται η οργάνωση του ελληνικού στρατού, η οχύρωση των ελληνικών συνόρων και η προμήθεια πολεμικού υλικού. Τέλος, αναλύεται ο επιχειρησιακός σχεδιασμός και τα μέτρα εσωτερικού, τα οποία έλαβε η κυβέρνηση.
description: The aim of this postgraduate thesis is to examine the primary sectors of the defense planning and the war preparation of Greece during the period 1936-1940. The research was based on the Archive of Army History Directorate, the Archive of Ioannis Metaxas (General State Archives) and a large number of published sources and bibliography. First of all, the study examines the contacts of Greece with her potential allies and her attempts to secure external assistance in case of war. Subsequently, it presents the organization of hellenic army, the fortifications of the greek borders and the supply of war material. Finally, it analyzes the operational planning and the internal measures, which the government took.
Phantom field fluctuation induced Higgs effect
Creators: name: Patkos, A.
name: Szep, Zs.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Symmetry breaking solutions are investigated in the $N\to \infty$ limit for the ground state of a system consisting of a Lorentz-scalar, N component ``phantom'' field and an O(N) singlet. The most general form of O(N) x Z_2 invariant quartic interaction is considered. The non-perturbatively renormalised solution demonstrates the possibility for Z_2 symmetry breaking induced by phantom fluctuations. It becomes also evident that the strength of the ``internal'' dynamics of the N-component field tunes away the ratio of the Higgs condensate and the Higgs mass from its perturbative (nearly tree-level) expression.
description: 9 pages, uses elsart.cls, version to appear in Phys. Lett. B
Higher-order topological phases in tunable $C_3$-symmetric photonic crystals
Creators: name: Wang, Hai-Xiao
name: Liang, Li
name: Jiang, Bin
name: Hu, Junhui
name: Lu, Xiancong
name: Jiang, Jian-Hua
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate that multiple higher-order topological transitions can be triggered via the continuous change of the geometry in kagome photonic crystals composed of three dielectric rods. By tuning a single geometry parameter, the photonic corner and edge states emerge or disappear with the higher-order topological transitions. Two distinct higher-order topological insulator phases and a normal insulator phase are revealed. Their topological indices are obtained from symmetry representations. A photonic analog of fractional corner charge is introduced to distinguish the two higher-order topological insulator phases. Our predictions can be readily realized and verified in configurable dielectric photonic crystals.
An exact analytic spectrum of relic gravitational waves in an accelerating universe
Creators: name: Zhang, Yang
name: Er, XinZhong
name: Xia, TianYang
name: Zhao, Wen
name: Miao, HaiXing
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: An exact analytic calculation is presented for the spectrum of relic gravitational waves in the scenario of accelerating Universe $Ω_Λ+Ω_m = 1$. The spectrum formula contains explicitly the parameters of acceleration, inflation, reheating, and the (tensor/scalar) ratio, so that it can be employed for a variety of cosmological models. We find that the spectrum depends on the behavior of the present accelerating expansion. The amplitude of gravitational waves for the model $Ω_Λ=0.65$ is about $\sim 50 %$ greater than that of the model $Ω_Λ=0.7$, an effect accessible to the designed sensitivities of LIGO and LISA. The spectrum sensitively depends on the inflationary models with $a(τ) \propto |τ|^{1+β}$, and a larger $β$ yields a flatter spectrum, producing more power. The current LIGO results rule out the inflationary models of $β\geq -1.8$. The LIGO with its design sensitivity and the LISA will also be able to test the model of $β=-1.9$. We also examine the constraints on the spectral energy density of relic gravitational waves. Both the LIGO bound and the nucleosynthesis bound point out that the model $β=-1.8$ is ruled out, but the model $β=-2.0$ is still alive. The exact analytic results also confirm the approximate spectrum and the numerical one in our previous work.
description: 27 pages, 14figures, minor typos corrected
Local Atomic Structure of Martensitic Ni$_{2+x}$Mn$_{1-x}$Ga: An EXAFS Study
Creators: name: Bhobe, P. A.
name: Priolkar, K. R.
name: Sarode, P. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The local atomic structure of Ni$_{2+x}$Mn$_{1-x}$Ga with 0 $\le$ $x$ $\le$ 0.16 alloys was explored using Mn and Ga K-edge Extended X-ray Absorption Fine Structure (EXAFS) measurement. Inorder to study the atomic re-arrangements that occur upon martensitic transformation, room temperature and low temperature EXAFS were recorded. The changes occurring in the L2$_1$ unit cell and the bond lengths obtained from the analysis enables us to determine the modulation amplitudes over which the constituent atoms move giving rise to shuffling of the atomic planes in the modulated structure. The EXAFS analysis also suggests the changes in hybridization of Ga-$p$ and Ni-$d$ orbitals associated with the local symmetry breaking upon undergoing martensitic transition.
description: Accepted for publication in Physical Review B
A search for transiting companions in the J1407 (V1400 Cen) system
Creators: name: Barmentloo, S.
name: Dik, C.
name: Kenworthy, M. A.
name: Mamajek, E. E.
name: Hambsch, F. -J.
name: Reichart, D. E.
name: Rodriguez, J. E.
name: van Dam, D. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: In 2007, the young star 1SWASP J140747.93-394542.6 (V1400 Cen) underwent a complex series of deep eclipses over 56 days. This was attributed to the transit of a ring system filling a large fraction of the Hill sphere of an unseen substellar companion. Subsequent photometric monitoring has not found any other deep transits from this candidate ring system, but if there are more substellar companions and they are coplanar with the potential ring system, there is a chance that they will transit the star as well. This young star is active and the light curves show a 5% modulation in amplitude with a dominant rotation period of 3.2 days due to star spots rotating in and out of view. We model and remove the rotational modulation of the J1407 light curve and search for additional transit signatures of substellar companions orbiting around J1407. We combine the photometry of J1407 from several observatories, spanning a 19 year baseline. We remove the rotational modulation by modeling the variability as a periodic signal, whose periodicity changes slowly with time over several years due to the activity cycle of the star. A Transit Least Squares (TLS) analysis searches for any periodic transiting signals within the cleaned light curve. We identify an activity cycle of J1407 with a period of 5.4 years. A Transit Least Squares search does not find any plausible periodic eclipses in the light curve, from 1.2% amplitude at 5 days up to 1.9% at 20 days. This sensitivity is confirmed by injecting artificial transits into the light curve and determining the recovery fraction as a function of transit depth and orbital period. J1407 is confirmed as a young active star with an activity cycle consistent with a rapidly rotating solar mass star. With the rotational modulation removed, the TLS analysis rules out transiting companions with radii larger than about 1 Jupiter.
description: 8 pages, 9 figures, 3 tables, accepted for publication in Astronomy & Astrophysics. Reduced data and reduction scripts on github at https://github.com/StanBarmentloo/J1407_transit_search_activity
Additivity of Entangled Channel Capacity for Quantum Input States
Creators: name: Belavkin, V. P.
name: Dai, X.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An elementary introduction into algebraic approach to unified quantum information theory and operational approach to quantum entanglement as generalized encoding is given. After introducing compound quantum state and two types of informational divergences, namely, Araki-Umegaki (a-type) and of Belavkin-Staszewski (b-type) quantum relative entropic information, this paper treats two types of quantum mutual information via entanglement and defines two types of corresponding quantum channel capacities as the supremum via the generalized encodings. It proves the additivity property of quantum channel capacities via entanglement, which extends the earlier results of V. P. Belavkin to products of arbitrary quantum channels for quantum relative entropy of any type.
description: 17 pages. See the related papers at http://www.maths.nott.ac.uk/personal/vpb/research/ent_com.html
Electronic structure and correlations in pristine and potassium doped Cu-Phthalocyanine molecular crystals
Creators: name: Giovannetti, Gianluca
name: Brocks, Geert
name: Brink, Jeroen van den
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate the changes in the electronic structure of copper phthalocyanine (CuPc) crystals that is caused by intercalation with potassium. This is done by means of {\it ab initio} LSDA and LSDA+U calculations of the electronic structure of these molecular crystals. Pristine CuPc is found to be an insulator with local magnetic moments and a Pc-derived valence band with a width of 0.32 eV. In the intercalated compound $\rm K_2CuPc$ the additional electrons that are introduced by potassium are fully transferred to the $e_g$ states of the Pc-ring. A molecular low spin state results, preserving, however, the local magnetic moment on the copper ions. The degeneracy of the $e_g$ levels is split by a crystal field that quenches the orbital degeneracy and gives rise to a band splitting of 110 meV. Molecular electronic Coulomb interactions enhance this splitting in $\rm K_2CuPc$ to a charge gap of 1.4 eV. The bandwidth of the conduction band is 0.56 eV, which is surprisingly large for a molecular solid. This is line with the experimentally observation that the system with additional potassium doping, $\rm K_{2.75}{CuPc}$, is a metal as the unusually large bandwidth combined with the substantial carrier concentration acts against localization and polaron formation, while strongly promoting the delocalization of the charge carriers.
description: 5 pages, 7 figures embedded
Εφαρμογή προβλεπτικού ελέγχου σε κλειστή μορφή σε γραμμικά συστήματα
Creators: name: Παπαδοπούλου, Βασιλική Θεόδωρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Προβλεπτικός Έλεγχος
Πολύ-παραμετρικός τετραγωνικός προγραμματισμός
Γραμμικά συστήματα
Model Predictive Control
Multi-parametric quadratic programming
Linear systems

description: Το αντικείμενο της παρούσας διπλωματικής εργασίας είναι η εφαρμογή ενός Προβλεπτικού Ελεγκτή κλειστής μορφής σε γραμμικά συστήματα και η αξιολόγηση των αποτελεσμάτων της δυναμικής συμπεριφοράς του. Η επίλυση σε πραγματικό χρόνο του προβλήματος βελτιστοποίησης που προκύπτει στον Προβλεπτικό Έλεγχο, ενδεχομένως να οδηγήσει σε σημαντική καθυστέρηση στη λήψη αποφάσεων. Αυτό δημιουργεί σημαντική μείωση της απόδοσης του συστήματος ελέγχου. Ο Προβλεπτικός Έλεγχος σε κλειστή μορφή αποτελεί μια αποτελεσματική λύση στο πρόβλημα της καθυστέρησης. Περιλαμβάνει το διαχωρισμό του χώρου των καταστάσεων σε πολύεδρα με τη χρήση των ανισοτήτων που προκύπτουν από τις συνθήκες βελτιστοποίησης του θεωρήματος Karush-Kuhn-Tucker (ΚΚΤ). Χρησιμοποιώντας αυτή την προσέγγιση, επιτυγχάνεται η απόκτηση των μεταβλητών ελέγχου σαν συνάρτηση κλειστής μορφής των αρχικών συνθηκών και ο υπολογισμός του προβλήματος βελτιστοποίησης πραγματικού χρόνου περιορίζεται σε μια απλή συνάρτηση που υπολογίζει τις αντίστοιχες δράσεις ελέγχου για τις δοθέντες μεταβλητές κατάστασης, που αποτελούν τις αρχικές συνθήκες του προβλήματος στην παρούσα χρονική στιγμή.
description: The subject of this diploma thesis is the implementation of explicit Model Predictive Control (MPC) in linear systems and the evaluation of its dynamical behavior. The online solution of the optimization problem arising in Model Predictive Control, possibly leads to a significant delay in the procedure of making decisions. This creates significant reduction in the performance of the system control. Explicit Model Predictive Control is an effective solution to the delay problem. The latter problem’s solution contains the partitioning of the state space into polyhedral regions using the inequalities resulting from the first–order Karush-Kuhn-Tucker (KKT) optimality conditions. Thus, with this approach the control variables are obtained as an explicit function of the state variables and therefore the online optimization breaks down to a simple function to compute the corresponding control actions for the given state variables of the plant, which are the initial conditions of the problem in the current time.
MUAMMOLARNI HAL QILISH VA NIZOLARNI BOSHQARISHDA PSXOLOGIK YONDASHUV
Creators: name: Xudayberdiyeva, Nodira
Publisher: name: Zenodo
Year: 2025

description: Mazkur maqolada muammolarni hal qilish va nizolarni boshqarish jarayonida psixologik yondashuvlarning o‘rni va ahamiyati yoritilgan. Insonlararo munosabatlarda yuzaga keladigan ijtimoiy va shaxsiy ziddiyatlarni anglash, ularning sabablari va oqibatlarini tahlil qilish orqali samarali hal qilish yo‘llari tahlil etilgan. Psixologik nazariyalar asosida muammolarni hal qilishda empatiya, faol tinglash, emotsional intellekt va konstruktiv muloqotning o‘rni ko‘rsatib berilgan. Shuningdek, nizolarni boshqarishda individual va guruhiy psixologik xususiyatlarning hisobga olinishi zarurligi asoslab berilgan. Tadqiqot natijalari amaliyotda psixologik yondashuvlardan foydalanish orqali ijtimoiy muammolarni barqaror va ijobiy hal qilish imkonini berishini ko‘rsatadi.
Investigation of the depth and the broadness of the dependence among behavioral structures in adult education class networks
Creators: name: Τσόκας, Αρσένιος-Νικόλαος Γρηγορίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Δίκτυα
Εκπαίδευση Ενηλίκων
Δομές Συμπεριφοράς
Networks
Adult Education
Behavioral Structures

description: A complete network analysis had been carried out in two Adult High Schools in Trikala and Ampelokipoi, Thessaloniki. The goal of the present research is to introduce new measures in statistical analysis, the certainty depth and the certainty broadness and apply these measures in social network analysis. The aim is also to study the concentrationism of the relation types involved in network analysis, as well as the pervasiveness of the structures involved and reach conclusions about each one of them. The diffused influence is also studied and, here, the notions of pure certainty depth and pure certainty broadness are introduced.
description: Πλήρης δικτυακή ανάλυση είχε εφαρμοστεί σε εκπαιδευτικά ιδρύματα ενηλίκων στα Τρίκαλα και στους Αμπελοκήπους Θεσσαλονίκης. Στόχος της παρούσης έρευνας είναι η εισαγωγή νέων μέτρων στην στατιστική ανάλυση: η βεβαιότητα βάθους και η βεβαιότητα ευρύτητας, και η εφαμογή αυτών των μέτρων στην ανάλυση δικτύων των εκπαιδευτικών ιδρυμάτων. Στόχος επίσης είναι η μελέτη του συγκεντρωτισμού κάθε τύπου σχέσης η οποία εμπλέκεται στην δικτυακή ανάλυση καθώς και η διεισδυτικότητα κάθε εμπλεκόμενης δομής και η εξαγωγή συμπερασμάτων. Η διασπαρμένη επιρροή μελετάται επίσης και εδώ εισάγονται
Διδακτικές της πολυγλωσσίας και δίγλωσσο παιδί στην Ελλάδα
Creators: name: Κακάνη, Σωτηρία Πελάγιου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Δίγλωσσο παιδί-Ελλάδα
Bilingual child-Greece

description: Αρχικά παρουσιάσαμε το σύγχρονο ελληνικό σχολείο από άποψη γλωσσικής και πολιτισμικής ποικιλομορφίας, αλλά και από την άποψη των μέτρων που έχουν παρθεί από το κράτος για την αρμονική συνεύρεση των γλωσσών και των πολιτισμών αυτών στα πλαίσια του σχολείου. Ερευνώντας την υπάρχουσα βιβλιογραφία, αναλύσαμε βασικές έννοιες και όρους που χρησιμοποιήσαμε στην συνέχεια, δηλαδή στην προβληματική μας, στις υποθέσεις μας και στην έρευνα μας. Οι έννοιες αυτές αποτέλεσαν και το έναυσμα για την ενασχόληση με το συγκεκριμένο θέμα. Στη συνέχεια αναφερθήκαμε στους προβληματισμούς που μας οδήγησαν στην έρευνα, στις ερευνητικές υποθέσεις που προσπαθήσαμε να επαληθεύσουμε μέσω αυτής και στις τεχνικές και μεθόδους που χρησιμοποιήσαμε. Παρουσιάσαμε την ισχύουσα νομοθεσία και τις επίσημες οδηγίες του Υπουργείου Παιδείας, όσον αφορά στην διγλωσσία, στην πολυγλωσσία και στα κρατικά εκπαιδευτικά ιδρύματα που σχετίζονται με αυτές. Στόχος μας ήταν να δείξουμε ότι η «αφύπνιση στις γλώσσες» συνάδει σε γενικές γραμμές με τους στόχους της ελληνικής εκπαίδευσης. Στην συνέχεια παρουσιάσαμε την έρευνα που πραγματοποιήθηκε, τις δραστηριότητες που πραγματοποιήσαμε και τους στόχους, και τέλος τα δεδομένα που συλλέχθηκαν. Έπειτα αναλύσαμε ποιοτικά τα δεδομένα που συλλέξαμε. Ειδικότερα παρουσιάσαμε κάθε μαθητή από διαφορετικές οπτικές έτσι ώστε να μπορούμε να εξετάσουμε τις ερευνητικές μας υποθέσεις. Μέσα από την παραπάνω διαδρομή κατασταλάξαμε σε κάποια συμπεράσματα. Τέλος προτείναμε τρόπους εισαγωγής της αφύπνισης στις γλώσσες στο ελληνικό σχολείο.
description: We presented the modern Greek school in terms of its linguistic and cultural diversity, as well as in terms of the measures taken by the state aiming the harmonious coexistence of various languages and cultures within the school. Researching the existing bibliography, we analyzed the basic concepts and terms used in this thesis, in our issue, in our hypothesis and in our research. These concepts have been the motivation for this issue which led us to the research. We presented the research hypotheses we tried to verify, and the techniques and methods used. We examined the current legislation and the official regulations of the Ministry of Education on bilingualism, multilingualism and the public institutions associated with them. Our aim was to show that the "language awareness" is compatible with the Greek education aims. Then we presented the research conducted, the activities we performed and the goals, and finally the data we collected. Then we analyzed the qualitative data collected. In particular we presented each student from different perspectives so that we can test our research hypotheses. Through the above route we settled some conclusions. Finally we proposed ways of introduction of language awareness to Greek school.
description: Συνεργαζόμενα Τμήματα Πανεπιστήμιο Λε Μαν (Maine France, Γαλλία)
title: Analiza rezonansowego układu emisji impulsów pola elektromagnetycznego
Creators: name: Nowak, Mikołaj
name: Jakubiuk, Kazimierz
name: Kowalak, Daniel
name: Wołoszyn, Mirosław
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 97, 7-16
Procam Calibration from a Single Pose of a Planar Target
Creators: name: Lawal, Ghani O.
name: Greenspan, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A novel user friendly method is proposed for calibrating a procam system from a single pose of a planar chessboard target. The user simply needs to orient the chessboard in a single appropriate pose. A sequence of Gray Code patterns are projected onto the chessboard, which allows correspondences between the camera, projector and the chessboard to be automatically extracted. These correspondences are fed as input to a nonlinear optimization method that models the projector of the principle points onto the chessboard, and accurately calculates the intrinsic and extrinsic parameters of both the camera and the projector, as well as the camera's distortion coefficients. The method is experimentally validated on the procam system, which is shown to be comparable in accuracy with existing multi-pose approaches. The impact of the orientation of the chessboard with respect to the procam imaging places is also explored through extensive simulation.
description: 11 pages, 9 figures, 10 tables. Submitted to the VISAPP Conference. Stored in the SciTepress Digital Library: https://www.scitepress.org/PublicationsDetail.aspx?ID=rGG70YCQyOs=&t=1
title: Ulepszona metoda momentów vs. funkcje pakietu obliczeniowego MATLAB System Identification Toolbox w zakresie estymacji parametrów prostych modeli dynamicznych w niestacjonarnych zagadnieniach wiroprądowych
Creators: name: Dudziak, Konrad
name: Stawicki, Krzysztof
name: Brykalski, Andrzej
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 97, 17-28
Κοινωνικο-οικονομική κρίση στο πλαίσιο του Νεοφιλελευθερισμού και οι επιπτώσεις στην Πρωτοβάθμια Εκπαίδευση (2010-2015)
Creators: name: Γάτου, Κυριακή Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Κοινωνικο-οικονομική κρίση
Πρωτοβάθμια Εκπαίδευση
Νεοφιλελευθερισμός
Socio-economic crisis
Primary School
Neoliberalism

description: Σκοπός της εργασίας ήταν η μελέτη των επιπτώσεων της κοινωνικο-οικονομικής κρίσης στην ελληνική Πρωτοβάθμια Εκπαίδευση στο διάστημα 2010-2015 συσχετίζοντας το θέμα με τον νεοφιλελευθερισμό. Αρχικά, εξετάσθηκε ο νεοφιλελευθερισμός ως όρος στην οικονομία και στην εκπαίδευση. Στη συνέχεια, μελετήθηκαν τα μέτρα λιτότητας που ελήφθησαν στον τομέα της Πρωτοβάθμιας Εκπαίδευσης μετά το ξέσπασμα της κρίσης. Κατόπιν, περιγράφηκε η ποιοτική έρευνα με τη χρήση συνεντεύξεων που διεξήχθη σε δημοτικά σχολεία της Θεσσαλονίκης, με στόχο να αναδειχθούν οι επιπτώσεις της κρίσης στο σχολικό πλαίσιο και οι προσπάθειες αντιμετώπισης τους. Τέλος, παρουσιάσθηκαν τα συμπεράσματα της εργασίας.
description: The purpose of the thesis was the study of the consequences that the socio-economic crisis has in the Greek First Degree Education during 2010-2015 in relation to neoliberalism. In the first place, neoliberalism was looked into as a term in the economy and education. Consecutively, the austerity measures which were taken in the sector of the First Degree Education after the outbreak of the crisis were studied. Next, the qualitative research was described with the use of interviews that took place in primary schools of Thessaloniki, with the aim to push forward the repercussions of the crisis in the school framework and their confrontation efforts. Finally, the conclusions of the thesis were presented.
Anisotropic $(p,q)$-equations with gradient dependent reaction
Creators: name: Papageorgiou, Nikolaos S.
name: Rădulescu, Vicenţiu D.
name: Repovš, Dušan D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J75, 35J60, 35J20

description: We consider a Dirichlet problem driven by the anisotropic $(p,q)$-Laplacian and a reaction with gradient dependence (convection). The presence of the gradient in the source term excludes from consideration a variational approach in dealing with the qualitative analysis of this problem with unbalanced growth. Using the frozen variable method and eventually a fixed point theorem, the main result of this paper establishes that the problem has a positive smooth solution.
The effect of an instructional program on the self-esteem of elementary school children
Creators: name: Hogan, Marcia E.
Publisher: name: University of British Columbia
Year: 2008

description: Research shows that the level of self-esteem which students bring to the learning environment influences their receptiveness to instruction. While high self-esteem creates a climate of empowerment, low self-esteem leads to dependency. Authors of self-esteem programs believe students can be taught self-esteem. Empirical research has only begun to test the validity of such beliefs. This study investigated the effectiveness of an instructional program designed to enhance self-esteem. It predicted a greater increase in self-esteem for those students receiving self-esteem instruction than for those who did not, a greater increase for students who began the program with low self-esteem than for those with average or high levels, and a high correlation between student self-reports and teacher ratings of student self-esteem. The subjects in the study were 107 students in four intact classes, two of Grade 5 and two of Grade 7, at an elementary school in Surrey, B.C. There was one Treatment group and one Comparison group at each grade level. The repeated measures design included a pretest, treatment, and a posttest. Treatment consisted of a12-lesson (nine week) self-esteem instructional program, based on the work of Michele Borba, for the treatment group. The Comparison group received regular class instruction. A mixed model ANOVA found no differences in self-esteem for the main effects of treatment and grade, but a significant increase in self-esteem mean scores for both Treatment and Comparison groups. An ANCOVA found no significant difference for the Treatment group by level of self-esteem on the pretest adjusted mean scores. Ecological factors, such as teacher behavior, may have confounded treatment effect. Teacher ratings of student self-esteem showed a weak correlation with student self-ratings. Item analysis of the Piers-Harris Indicated some effect due to instruction and suggested qualitative measures may more accurately assess short-term interventions. The results of this study indicate lack of empirical support for the effectiveness of self-esteem enhancement through instructional interventions. Future research should determine the effect of teacher behavior, isolate the ecological factors which contributed to increased self-esteem, establish effective qualitative measures, and plan furlong term follow-up.
Three clusters of the SMC from ACS/WFC HST archive data: NGC 265, K~29 and NGC 290 and their fields
Creators: name: Chiosi, E.
name: Vallenari, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We determine the age, metallicity and initial mass function of three clusters, namely NGC 265, K~29, NGC 290, located in the main body of the Small Magellanic Cloud. In addition, we derive the history of star formation in the companion fields. We make use of ACS/WFC HST archive data. For the clusters, the age and metallicity are derived fitting the integrated luminosity function with single synthetic stellar population by means of the $χ^2$ minimization. For the companion fields, the history of star formation is derived using the $χ^2$ minimization together with the downhill-simplex method.For the clusters we find the following ages and metallicities: NGC 265 has log(Age)=$8.5\pm0.3$ yr and metallicity $0.004\pm0.003$(or [Fe/H]=-0.62); \object{K~29} has log(Age)=$8.2\pm0.2$ yr and metallicity Z=$0.003\pm0.002$ (or [Fe/H]=-0.75); NGC 290 has log(Age)=$7.8\pm0.5$ yr and metallicity $0.003\pm0.002$(or [Fe/H]=-0.75). The superior quality of the data allows the study of the initial mass function down to M$ \sim$ 0.7 M$_\odot$. The initial mass function turns out to be in agreement with the standard Kroupa model. The comparison of the NGC 265 luminosity function with the theoretical ones from stellar models both taking overshoot from the convective core into account and neglecting it, seems to suggest that a certain amount of convective overshoot is required. The star formation rate of the field population presents periods of enhancements at 300-400 Myr, 3-4 Gyr and finally 6 Gyr. However it is relatively quiescent at ages older than 6 Gyr. This result suggests that at older ages, the tidal interaction between the Magellanic Clouds and the Milky Way was not able to trigger significant star formation events.
description: 20 pages. A&A accepted
title: Asymetria pola magnetycznego ekranowanego trójfazowego jednobiegunowego płaskiego toru wielkoprądowego
Creators: name: Kusiak, Dariusz
name: Szczegielniak, Tomasz
name: Piątek, Zygmunt
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 97, 29-37
Real symmetric random matrices and replicas
Creators: name: Cicuta, Giovanni M.
name: Orland, Henri
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Various ensembles of random matrices with independent entries are analyzed by the replica formalism in the large-N limit. A result on the Laplacian random matrix with Wigner-rescaling is generalized to arbitrary probability distribution.
description: 17 pages
title: Redukcja natężenia pola elektrycznego i magnetycznego w otoczeniu napowietrznej linii elektroenergetycznej
Creators: name: Król, Krzysztof
name: Machczyński, Wojciech
name: Budnik, Krzysztof
name: Szymenderski, Jan
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 97, 49-62
Η επίδραση ενός προγράμματος γιόγκα στη λειτουργική ικανότητα και στο άγχος ασθενών με χρόνια καρδιακή ανεπάρκεια
Creators: name: Ανδρεάδου, Στυλιανή Στυλιανού
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Γιόγκα
Άγχος Και Καρδιοπαθείς
Λειτουργική ικανότητα και Καρδιοπαθείς
Yoga
Anxiety and patients with chronic heart failure
Functional capacity and patients with chronic heart failure

description: Οι ασθενείς με χρόνια καρδιακή ανεπάρκεια χαρακτηρίζονται από περιορισμένη λειτουργική ικανότητα η οποία επηρεάζει άμεσα την ψυχοσυναισθηματική τους κατάσταση όπως είναι το άγχος. Η γιόγκα ως άσκηση, αναμένεται να δώσει λύση στο πρόβλημα καθώς αποτελεί έναν ασφαλή τρόπο γύμνασης στον οποίο επιτυγχάνεται ο απόλυτος συνδυασμός βελτίωσης τόσο των ψυχοσυναισθηματικών όσο και των βιολογικών δεικτών. Σκοπός της έρευνας αυτής ήταν η εκτίμηση της επίδρασης ενός προγράμματος γιόγκα, στη λειτουργική ικανότητα και στα επίπεδα άγχους των ασθενών με Χρόνια Καρδιακή Ανεπάρκεια. Από τα αποτελέσματα της έρευνας φάνηκε ότι η εξάμηνη άσκηση γιόγκα συνέβαλε αποτελεσματικά στην βελτίωση της λειτουργικής ικανότητας των ασθενών, διαφοροποίησε την υποκειμενική αντίληψη του άγχους όπως αυτό εκτιμήθηκε με το ερωτηματολόγιο και τέλος βελτίωσε την αγωγιμότητα η οποία αποτελεί αντικειμενικό δείκτη στα επίπεδα του άγχους που νιώθουν οι ασθενείς με χρόνιες καρδιοπάθειες. Συμπεραίνεται ότι ένα εξάμηνο πρόγραμμα άσκησης με γιόγκα είναι εφικτό και αποτελεσματικό στη διαχείριση του άγχους που εμφανίζουν οι ασθενείς με χρόνια καρδιακή ανεπάρκεια.
description: Patients with chronic heart failure are characterized by limited functional capacity which directly affects their psycho-emotional state such as stress. Yoga as a mode of training is expected to help solving this problem, as it is proved to be a safe way to improve both psycho-emotional and biological markers in healthy individuals. The purpose of this study was to evaluate the effects of a yoga program, on functional capacity and stress levels of patients with Chronic Heart Failure (CHF). The results of the present study indicated that the 6-month yoga training program, contribute effectively to the functional capacity. Diversified its subjective perception of stress as assessed by questionnaire and finally improved conductivity which is an objective index in stress levels experienced by patients with chronic heart diseases.
title: Badania i analiza wybranych lamp LED z gwintem E27 w zakresie generowania odkształceń harmonicznych
Creators: name: Putz, Łukasz
name: Nawrowski, Ryszard
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 97, 87-96
title: Analiza hybrydowych filtrów EMI dla wysokiego poziomu zaburzeń przewodzonych generowanych przez falownik
Creators: name: Pasko, Marian
name: Szymczak, Marek
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 97, 97-108
Testing chiral effective theory with quenched lattice QCD
Creators: name: Giusti, L.
name: Hernandez, P.
name: Necco, S.
name: Pena, C.
name: Wennekers, J.
name: Wittig, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We investigate two-point correlation functions of left-handed currents computed in quenched lattice QCD with the Neuberger-Dirac operator. We consider two lattice spacings a~0.09,0.12 fm and two different lattice extents L~ 1.5, 2.0 fm; quark masses span both the p- and the epsilon-regimes. We compare the results with the predictions of quenched chiral perturbation theory, with the purpose of testing to what extent the effective theory reproduces quenched QCD at low energy. In the p-regime we test volume and quark mass dependence of the pseudoscalar decay constant and mass; in the epsilon-regime, we investigate volume and topology dependence of the correlators. While the leading order behaviour predicted by the effective theory is very well reproduced by the lattice data in the range of parameters that we explored, our numerical data are not precise enough to test next-to-leading order effects.
description: 29 pages, 10 figures
Coincidence Problem in YM Field Dark Energy Model
Creators: name: Zhao, Wen
name: Zhang, Yang
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The coincidence problem is studied in the effective Yang-Mills condensate dark energy model. As the effective YM Lagrangian is completely determined by quantum field theory, there is no adjustable parameter in this model except the energy scale, and the cosmic evolution only depends on the initial conditions. For generic initial conditions with the YM condensate subdominant to the radiation and matter, the model always has a tracking solution, the Universe transits from matter-dominated into the dark energy dominated stage only recently $z\sim 0. 3$, and evolve to the present state with $Ω_{y}\sim 0.73$ and $Ω_m\sim 0.27$.
description: 10 pages including 4 figures. Only style is revised
Noise Limited Computational Speed
Creators: name: Gammaitoni, Luca
Publisher: name: arXiv
Year: 2007
Subjects: subject: Hardware Architecture (cs.AR)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences
subject: B.1.3; B.7.0; B.8.1; B.8.2

description: In modern transistor based logic gates, the impact of noise on computation has become increasingly relevant since the voltage scaling strategy, aimed at decreasing the dissipated power, has increased the probability of error due to the reduced switching threshold voltages. In this paper we discuss the role of noise in a two state model that mimic the dynamics of standard logic gates and show that the presence of the noise sets a fundamental limit to the computing speed. An optimal idle time interval that minimizes the error probability, is derived.
Spin-dependent Rotating Wigner Molecules in Quantum dots
Creators: name: Dai, Zhensheng
name: Zhu, Jia-Lin
name: Yang, Ning
name: Wang, Yuquan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The spin-dependent trial wave functions with rotational symmetry are introduced to describe rotating Wigner molecular states with spin degree of freedom in four- and five-electron quantum dots under magnetic fields. The functions are constructed with unrestricted Hartree-Fock orbits and projection technique in long-range interaction limit. They highly overlap with the exact-diagonalized ones and give the accurate energies in strong fields. The zero points, i.e. vortices of the functions have straightforward relations to the angular momenta of the states. The functions with different total spins automatically satisfy the angular momentum transition rules with the increase of magnetic fields and explicitly show magnetic couplings and characteristic oscillations with respect to the angular momenta. Based on the functions, it is demonstrated that the entanglement entropies of electrons depend on the z-component of total spin and rise with the increase of angular momenta.
title: Optymalizacja parametrów obciążenia generatora magnetokumulacyjnego
Creators: name: Wołoszyn, Mirosław
name: Kowalak, Daniel
name: Jakubiuk, Kazimierz
name: Nowak, Mikołaj
Publisher: name: Publishing House of Poznan University of Technology
Year: 2019

description: Poznan University of Technology Academic Journals: Electrical Engineering, 97, 125-132
Το ζήτημα της αξιολόγησης των εκπαιδευτικών στην ελληνική γενική εκπαίδευση κατά την περίοδο 1982 – 2004. Οι προθέσεις του κράτους και οι θέσεις των εκπαιδευτικών.
Creators: name: Ρουκούδη, Χριστίνα Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: νομοθεσία για την αξιολόγηση των εκπαιδευτικών
αξιολόγηση των εκπαιδευτικών
αντίσταση κατά της αξιολόγησης των εκπαιδευτικών
Teacher evaluation legislation
Teacher evaluation
Resistance against teacher evaluation

description: Σκοπός της εργασίας είναι η μελέτη του ζητήματος της αξιολόγησης των εκπαιδευτικών κατά την περίοδο 1982 – 2004. Μελετώνται οι προθέσεις του Κράτους και οι θέσεις των εκπαιδευτικών κατά τη συγκεκριμένη περίοδο. Παρουσιάζεται θεωρία γύρω από τα μοντέλα της αξιολόγησης και την κοινωνική της λειτουργία αλλά και ορισμοί γύρω από την έννοια «εκπαιδευτικό έργο». Στη συνέχεια, παρουσιάζονται οι τάσεις της αξιολόγησης των εκπαιδευτικών στην Ευρώπη και τις Η.Π.Α. εντός του πολιτικού τους πλαισίου. Έπειτα, γίνεται εκτενής περιγραφή της συζήτησης που διαμορφώθηκε ανάμεσα στο Κράτος και τις ομοσπονδίες των εκπαιδευτικών για το είδος της αξιολόγησης των εκπαιδευτικών και τις προθέσεις των δύο πλευρών. Τέλος, διατυπώνονται συμπεράσματα ως προς το είδος και τον χαρακτήρα της αξιολόγησης που υποστήριζε η κάθε πλευρά και διαπιστώνονται οι παράγοντες που εμπόδισαν την εφαρμογή της αξιολόγησης των εκπαιδευτικών τη συγκεκριμένη περίοδο.
description: The aim of the present dissertation is the study of the issue of teacher evaluation over the period from 1982 to 2004. We examine the state’s plan and teachers’ reaction over these years. We present theoretical framework about different models of evaluation and the social function of evaluation and the definitions given for the expression “educational work”. Furthermore, we present the tendency of teacher evaluation in Europe and U.S.A. considering the political framework. Moreover, we provide extensive analysis of the conversation between the state and the teachers’ federations about the type of teacher evaluation and the propositions of both sides. Finally, we outline our conclusions about the type of evaluation each side suggested and we ascertain the factors that prevented the implementation of teacher evaluation during this period.
Reluctant realists: the Pacific Northwest lumber industry, federal labor standards and union legislation during the New Deal
Creators: name: Knight, Simon A.
Publisher: name: University of British Columbia
Year: 2008

description: The relationship between government and business during the New Deal can best be understood as one based on mutual dependence rather than endemic hostility. This is demonstrated with reference to the Northwest lumber industry and its response to New Deal labor standards and labor union legislation. The Northwest lumber industry during the 1920s and 1930s was beset by the problems of overproduction and cut throat competition which plagued much of American industry during the Great Depression. Industry leaders strove for ways in which to regulate a fiercely competitive marketplace. Attempts to foist higher production standards on marginal competitors through the promotion of voluntary trade associations failed because of the absence of enforcement mechanisms within the associational structure. The National Recovery Administration (NRA) similarly failed to provide a disciplined framework for competition in the region because the federal government failed to fulfill its role as an enforcement agent, although the experience of the NRA did suggest to the industry the potential benefits of stabilizing the marketplace through the regulation of labor costs, which were such a significant and vulnerable item in the business calculations of lumber operations. The problem of enforcement, however, remained. Labor unions had a record under the NRA and in the coal and clothing industries as an effective regulator of labor standards, but the memory of radical unionism in the early lumber industry combined with a concern for managerial prerogatives to forestall any voluntary support on the part of Northwest lumber leaders for unionisation in the region. The elevation of unions under the National Labor Relations Act, however, prompted versatile lumber executives to use the empowered unions for their own regulatory purposes. Never entirely comfortable with the potential costs of strong unions, the Northwest lumber industry turned to the federal regulation offered under the Fair Labor Standards Act as an additional, effective and less risky method of securing much needed stability in the industry.
Observation of B+ -> Phi Phi K+ and evidence for B0 -> Phi Phi K0 below Eta_C threshold
Creators: name: The BABAR Collaboration
name: Aubert, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report measurements of the decays B+ -> Phi Phi K+ and B0 -> hi Phi K0 using a sample of 231 million BBbar pairs collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. The branching fractions are measured to be Br(B+ -> Phi Phi K+) = (7.5 +/- 1.0 stat. +/- 0.7 syst.) * 10^-6 and Br(B0 -> Phi Phi K0) = (4.1 +1.7/-1.4 stat. +/- 0.4 syst.) * 10^-6 for a Phi Phi invariant mass below 2.85 GeV/c2.
description: 7 pages, 2 postscript figues, published in Physical Review Letters
Μετάφραση και φύλο: Μια σχολιασμένη μετάφραση του άρθρου της Michela Zucca “L’eresia delle femmine ribelli
Creators: name: Κυριλλίδου, Βαρβάρα Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Φεμινιστική Μετάφραση
Σπουδές Φύλου
Κυνήγι Μαγισσών
Feminist Translation
Gender Studies
Witch Hunt

description: Στην παρούσα μεταπτυχιακή διατριβή επιχειρήθηκε ένα μεταφραστικό πείραμα, η σχολιασμένη μεταφορά στην ελληνική γλώσσα του, γραμμένου στα ιταλικά, άρθρου, της Michela Zucca, με τίτλο L’eresia delle femmine ribelli – Donne delle foreste e delle montagne, σύμφωνα με τις μεταφραστικές στρατηγικές που προτείνονται από το θεωρητικό πεδίο της φεμινιστικής μετάφρασης. Σκοπός του εγχειρήματος ήταν η δημιουργία ρωγμών στον κυρίαρχο λόγο και, ειδικότερα, στον τρόπο που αυτός συνδράμει στην κοινωνική κατασκευή της γυναικείας ταυτότητας φύλου. Εισαγωγικά έγινε αναφορά στο περιεχόμενο και στις εκδόσεις του πρωτότυπου κειμένου, στη συγγράφισσά του και στο έργο της, στις αιτίες που επιλέχθηκε και στη συνεισφορά του όλου εγχειρήματος στην Επιστήμη της Μετάφρασης. Στη συνέχεια εξετάστηκαν αναλυτικά οι συγκυρίες της συνάντησης μετάφρασης και φύλου: η θεωρητική έκφραση των φεμινιστικών κινημάτων, η συμβολή του Jacques Derrida και η γυναικεία γραφή (écriture féminine). Ακόμη έγινε εκτενή αναφορά στις θεωρητικές συνιστώσες της φεμινιστικής μετάφρασης, με έμφαση στην Σχολή του Κεμπέκ, καθώς και στις μεταφραστικές στρατηγικές που προτείνει. Επιπλέον παρουσιάστηκε η μεθοδολογία της μεταφραστικής διαδικασίας και εξετάστηκαν διεξοδικά επιλεγμένα ζητήματα μεταφραστικών προκλήσεων μέσα από εφαρμογές φεμινιστικής μετάφρασης.
description: The aim of the present master thesis was to present a translation experiment, an annotated translation into Greek of Michela Zucca’s article, originally written in Italian, L'eresia delle femmine ribelli - Donne delle foreste e delle montagne, according to the translation strategies proposed in the field of feminist translation theory. The aim of the project was to rupture the dominant discourse, specifically the way in which it contributes to the social construction of female gender identity. Introductory reference was made to the content and publications of the original text, to the auther and her work, to the reasons it was chosen and to the project’s contribution to the Translasion Studies. The broader contexts of translation and gender were then analyzed: the theory of feminist movements, the contribution of Jacques Derrida and feminine writing (écriture féminine). Extensive reference was made to the various components of feminist translation theory, with emphasis on the Quebec School and the translation strategies it suggests. The methodology of the translation process was also presented and specific translation issues were thoroughly examined through the lens of feminist translation.
Metamagnetism of few layer topological antiferromagnets
Creators: name: Lei, C.
name: Heinonen, O.
name: MacDonald, A. H.
name: McQueeney, R. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: MnBi$_2$Te$_4$ (MBT) is a promising antiferromagnetic topological insulator whose films provide access to novel and technologically important topological phases, including quantum anomalous Hall states and axion insulators. MBT device behavior is expected to be sensitive to the various collinear and non-collinear magnetic phases that are accessible in applied magnetic fields. Here, we use classical Monte Carlo simulations and electronic structure models to calculate the ground state magnetic phase diagram as well as topological and optical properties for few layer films with thicknesses up to six septuple layers. Using magnetic interaction parameters appropriate for MBT, we find that it is possible to prepare a variety of different magnetic stacking sequences, some of which have sufficient symmetry to disallow non-reciprocal optical response and Hall transport coefficients. Other stacking arrangements do yield large Faraday and Kerr signals, even when the ground state Chern number vanishes.
description: 8 pages, 5 figures