cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Διδακτικές προσεγγίσεις στη Δευτεροβάθμια Εκπαίδευση: η περίπτωση των σχολείων εφαρμογής της πρακτικής άσκησης των φοιτητών του Α.Π.Θ.
Creators: name: Δημητριάδου, Κατερίνα
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The paper concerns an empirical research about the teaching methods, which are used in Greek secondary schools, especially the ones that participate in the teacher training practice of student teachers of the Department of Philosophy and Education, Aristotle University of Thessalonica. The results show that the established teaching styles and the classroom climate in general have a traditional, old-fashioned character and give little chance for structural innovations and significant educational reforms.
description: Παιδαγωγική Επιθεώρηση, Vol. 39 (2005)
Production of omega mesons at Large Transverse Momenta in p+p and d+Au Collisions at sqrt(s_NN) = 200 GeV
Creators: name: PHENIX Collaboration
name: Adler, S. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The PHENIX experiment at RHIC has measured the invariant cross section for omega-meson production at mid-rapidity in the transverse momentum range 2.5 < p_T < 9.25 GeV/c in p+p and d+Au collisions at sqrt(s_NN) = 200 GeV. Measurements in two decay channels (omega --> pi^0 pi^+ pi^- and omega --> pi^0 gamma) yield consistent results, and the reconstructed omega mass agrees with the accepted value within the p_T range of the measurements. The omega/pi^0 ratio is found to be 0.85 +/- 0.05(stat) +/- 0.09(sys) and 0.94 +/- 0.08(stat) +/- 0.12(sys) in p+p and d+Au collisions respectively, independent of p_T . The nuclear modification factor R_dA is 1.03 +/- 0.12(stat) +/- 0.21(sys) and 0.83 +/- 0.21(stat) +/- 0.17(sys) in minimum bias and central (0-20%) d+Au collisions, respectively.
description: 330 authors, 6 pages text, 4 figures, 1 table. Submitted to Phys. Rev. Lett. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html
A Novel Chaotic System for Text Encryption Optimized with Genetic Algorithm
Creators: name: Menon, Unnikrishnan
name: Menon, Anirudh Rajiv
name: Hudlikar, Atharva
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: With meteoric developments in communication systems and data storage technologies, the need for secure data transmission is more crucial than ever. The level of security provided by any cryptosystem relies on the sensitivity of the private key, size of the key space as well as the trapdoor function being used. In order to satisfy the aforementioned constraints, there has been a growing interest over the past few years, in studying the behavior of chaotic systems and their applications in various fields such as data encryption due to characteristics like randomness, unpredictability and sensitivity of the generated sequence to the initial value and its parameters. This paper utilizes a novel 2D chaotic function that displays a uniform bifurcation over a large range of parameters and exhibits high levels of chaotic behavior to generate a random sequence that is used to encrypt the input data. The proposed method uses a genetic algorithm to optimize the parameters of the map to enhance security for any given textual data. Various analyses demonstrate an adequately large key space and the existence of multiple global optima indicating the necessity of the proposed system and the security provided by it.
description: 7 pages, 5 figures, 1 table
Η έρευνα δράσης ως μέθοδος επιμόρφωσης των εκπαιδευτικών: ένα παράδειγμα
Creators: name: Αυγητίδου, Σοφία
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: This paper reports on an action research with mentors of student teachers within a teaching practice programme. It focuses on the processes of supporting teachers as researchers. The different stages of educating mentors in research methods and specifically in the action research spiral are critically analyzed. The role of the coordinator is proved to be influenced by the knowledge, capacities, worries and dynamics of the group involved in action research. The paper presents both the difficulties of enhancing teachers as researchers as well as the benefits from employing action research as an in-service education method.
description: Παιδαγωγική Επιθεώρηση, Vol. 39 (2005)
Additional file 1 of Ecto-GPR37: a potential biomarker for Parkinson’s disease
Creators: name: Morató, Xavier
name: Garcia-Esparcia, Paula
name: Argerich, Josep
name: Llorens, Franc
name: Zerr, Inga
name: Paslawski, Wojciech
name: Borràs, Eva
name: Sabidó, Eduard
name: Petäjä-Repo, Ulla E.
name: Fernández-Dueñas, Víctor
name: Ferrer, Isidro
name: Svenningsson, Per
name: Ciruela, Francisco
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Molecular Biology
subject: Neuroscience
subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 1. Supplementary Methods. Supplementary Figure S1. Correlations of CSF ecto-GPR37 levels with age in male and female Parkinson’s disease patients. The correlation coefficients (r) was calculated using the Spearman two-tailed correlation test. Supplementary Figure S2. Correlations of CSF ecto-GPR37 levels with disease duration (a), Unified Parkinson’s Disease Scale (UPDRS, n = 26) total (b) and part 3 (c), Hoehn & Yahr (H&Y) scale (n = 40) (d), Montreal Cognitive Assessment scores (MoCA, n = 28) evaluating the cognitive impairment (e), Hospital Anxiety and Depression scale (HADS, n = 26) (f) and L-dopa equivalent doses (LEDs, n = 28) (g). The correlation coefficients (r) was calculated using the Spearman two-tailed correlation test.
Gaussian approximation to single particle correlations at and below the picosecond scale for Lennard-Jones and nanoparticle fluids
Creators: name: van Zon, R.
name: Ashwin, S. S.
name: Cohen, E. G. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: To describe short-time (picosecond) and small-scale (nanometre) transport in fluids, a Green's function approach was recently developed. This approach relies on an expansion of the distribution of single particle displacements around a Gaussian function, yielding an infinite series of correction terms. Applying a recent theorem [Van Zon and Cohen, J. Stat. Phys. 123, 1-37 (2006)] shows that for sufficiently small times the terms in this series become successively smaller, so that truncating the series near or at the Gaussian level might provide a good approximation. In the present paper, we derive a theoretical estimate for the time scale at which truncating the series at or near the Gaussian level could be supposed to be accurate for equilibrium nanoscale systems. In order to numerically estimate this time scale, the coefficients for the first few terms in the series are determined in computer simulations for a Lennard-Jones fluid, an isotopic Lennard-Jones mixture and a suspension of a Lennard-Jones-based model of nanoparticles in a Lennard-Jones fluid. The results suggest that for Lennard-Jones fluids an expansion around a Gaussian is accurate at time scales up to a picosecond, while for nanoparticles in suspension (a nanofluid), the characteristic time scale up to which the Gaussian is accurate becomes of the order of five to ten picoseconds.
description: 21 pages, 3 figures, 4 tables. Accepted for publication in Nonlinearity
BAIKAL Experiment: main results obtained with the neutrino telescope NT200
Creators: name: Dzhilkibae, Zh. -A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Baikal Neutrino Telescope NT200 takes data since April 1998. On April 9th, 2005, the 10 Mton scale detector NT200$+$ was put into operation in Lake Baikal. Selected results obtained during 1998-2002 with the neutrino telescope NT200 are presented.
description: 6 pages, 7 figures, presented at 2nd VLVNT Workshop on Very Large Volume Neutrino Telescope (VLVNT2), Catania, Italy, 8-11 Nov. 2005
Experimental and numerical analysis to enhance the thermodynamic properties and biofuel stability: Sapindus mukorossi
Creators: name: Kota, Muninathan
name: Madhavan, Venkata Ramanan
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Microscale additives face challenges like sedimentation, conglomeration, and uneven size distribution, which can adversely impact biodiesel stability and thermochemical properties. This study investigates the stability and thermochemical properties of magnesium-doped calcium oxide (MdC) in Sapindus mukkarosi (SMBD25) biodiesel emulsified with antioxidants SPAN80 (SP80) and TWEEN80 (TW80) at different concentrations. 9 sets of experiments were carried out with the L9 OA as per the design matrix. Minitab 16 software was used to simplify the analysis of the results using the Taguchi method. Also, this research encompassed a comprehensive investigation by employing GCFID, SEM and XRD techniques. From the results, the heating value and cetane number for SMBD25 + 30 mg/L MdC + 30 mg/L TW80 + 30 mg/L SP80, surfactant and dispersant (1:1 ratio) biodiesel blend is improved. The enhanced absorbance and reduced transmittance for SMBD25 + 30 mg/L MdC + 30 mg/L TN80 + 30 mg/L SP80 were estimated to be 4.63 and 0.53%, respectively, while the heating value and cetane number were calculated to be 42.13 MJ/kg and 56, respectively. The Taguchi method revealed that SMBD27.8, 34ppm nanocatalyst, and 24ppm dispersant were optimum process parameters. The biodiesel blend is highly effective (71.18%) in controlling the optimal biodiesel thermochemical properties, followed by the dispersant (19.55%).
Το Κρητικό Ζήτημα από την ίδρυση του ελληνικού κράτους το 1830 έως την απόκτηση της αυτονομίας του νησιού το 1898 : ο ρόλος των πατριωτικών οργανώσεων.
Creators: name: Μαλανδρή, Μαρία Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Μεγάλη Ιδέα
Οργανώσεις
Αυτονομία
Great Idea
Organizations
Autonomy

description: Το θέμα της εργασίας είναι το Κρητικό Ζήτημα από την ίδρυση του ελληνικού κράτους το 1830, μέχρι την απόκτηση της αυτονομίας της Κρήτης το 1898 και συγκεκριμένα ο ρόλος των πατριωτικών οργανώσεων. Η παρούσα εργασία πραγματεύεται την ιστορία του νησιού της Κρήτης καθόλη τη διάρκεια του 19ου αιώνα και συγκεκριμένα ειδικεύεται στις οργανώσεις-σωματεία που έδρασαν ολόκληρο τον αιώνα. Στόχος της εργασίας είναι η ανάδειξη των εταιρειών αυτών, η δράση τους και η σχέση τους με την εκάστοτε εξουσία. Κινητήριος δύναμη για τη δημιουργία αυτών των οργανώσεων αποτέλεσε η Μεγάλη Ιδέα, ένα νεφελώδες, εθνικό πρόγραμμα, το οποίο μεταλλασσόταν καθόλη την περίοδο του 19ου αιώνα. Η εργασία βασίζεται σε αρχειακή έρευνα στο Ιστορικό Αρχείο Κρήτης, στο Μουσείο Μακεδονικού Αγώνα, σε εκτενή βιβλιογραφία, σε εφημερίδες, άρθρα περιοδίκων, εγκυκλοπαίδειες δίνοντας φως σε αθέατες πλευρές της ιστορίας του νησιού. Τέλος, αποδεικνύει τη ''μυστική'' δράση των σωματείων αλλά και τις υπόγειες συζητήσεις που διατηρούσαν με τις κυβερνήσεις, καθιστώντας τη δράση τους πολλές φορές διεκπεραιωτική.
description: This paper's subject is the Cretan Issue from the establishment of the Greek State in 1830, until the Cretan Autonomy in 1898 and more specifically the role of patriotic organizations in it. The present paper deals with the history of Crete throughout the 19th century and namely the organizations/guilds that were active during this period. The purpose of this research is the designation of these organizations, their actions and their relations with the present authorities. Their motivational force was the Great Idea, a misty national agenda, which kept developing throughout the Century. This paper is based in archival research at the Historical Archives of Crete and the Museum of Macedonian Struggle, in an extended bibliography, newspapers, articles and encyclopedias enlightening unseen aspects of Crete history. Finally, it proves the ''secret'' action of these guilds and also their secret discussions with the goverments, granting them an executive role.
Additional file 1 of Group versus individual treatment for substance use disorders: a study protocol for the COMDAT trial
Creators: name: Karsberg, Sidsel Helena
name: Pedersen, Mads Uffe
name: Hesse, Morten
name: Thylstrup, Birgitte
name: Pedersen, Michael Mulbjerg
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Appendix 1. Participant information (translated version). Appendix 2. Schedule of enrolment, interventions, and assessments.
Folha de código - Analise de conteúdo
Creators: name: Gomes, Walter
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 520501
subject: Community psychology
classificationCode: 520505
subject: Social psychology

description: Folha de código usada na analise de conteúdo para Revisão das publicações acadêmicas sobre Jornadas de Junho de 2013 no Brasil.
Exotic projective structures and quasifuchsian spaces II
Creators: name: Ito, Kentaro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 30F40, 57M50

description: Let $P(S)$ be the space of projective structures on a closed surface $S$ of genus $g >1$ and let $Q(S)$ be the subset of $P(S)$ of projective structures with quasifuchsian holonomy. It is known that $Q(S)$ consists of infinitely many connected components. In this paper, we will show that the closure of any exotic component of $Q(S)$ is not a topological manifold with boundary and that any two components of $Q(S)$ have intersecting closures.
description: 22 pages, 9 figures
Αιτιότητα κατά Granger σε μη-στάσιμες χρονικές σειρές με πολυμεταβλητά μοντέλα VECM – εφαρμογή σε κύριους διεθνείς δείκτες
Creators: name: Μπρίκου, Ελένη Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Μη-στάσιμες χρονικές σειρές
Αιτιότητα κατά Granger
VECM μοντέλα
Non-stationary time series
Granger causality
VECM models

description: Σκοπός της διατριβής ήταν η αναλυτική παρουσίαση της έννοιας της συνολοκλήρωσης και ο έλεγχος της αιτιότητας κατά Granger σε μη στάσιμες χρονικές σειρές. Οι επεκτάσεις του εν λόγω ελέγχου και τα εναλλακτικά μοντέλα αιτιότητας διευρύνουν την έρευνα και μέσα από την εμπειρική εφαρμογή γίνεται προσπάθεια διερεύνησης μακροχρόνιων και βραχυχρόνιων σχέσεων μεταξύ πολλών χρηματιστηριακών δεικτών με τη χρήση VECM υποδειγμάτων. Μέσω της εξέτασης τέτοιου είδους σχέσεων ανάμεσα σε κύριους διεθνείς χρηματιστηριακούς δείκτες, ελέγχεται και η υπόθεση της αποτελεσματικής αγοράς, η οποία αφορά στην πληροφοριακή αποτελεσματικότητα και συγκεκριμένα το επίπεδο της ασθενούς αποτελεσματικότητας.
description: In this project, the concept of integration and testing of Granger causality for non stationary time series is being presented. The study includes extensions of the Granger causality test and alternative models of causality and also empirical implementation is being investigated with the use of VECM models, long-term and short-term relationships between many stock indices. Through the examination of such relationships among indices, is being controlled the Efficient Market Hypothesis (EMH), which relates to the informational efficiency and the specific informational efficiency at the level of ‘patient’ effectiveness.
Delocalisation transition in quasi-1D models with correlated disorder
Creators: name: Tessieri, L.
name: Izrailev, F. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We introduce a new approach to analyse the global structure of electronic states in quasi-1D models in terms of the dynamics of a system of parametric oscillators with time-dependent stochastic couplings. We thus extend to quasi-1D models the method previously applied to 1D disordered models. Using this approach, we show that a ``delocalisation transition'' can occur in quasi-1D models with weak disorder with long-range correlations.
description: 33 pages, no figures
Εμπλεκόμενες δυναμικές στην εισαγωγή και εφαρμογή προγραμμάτων σπουδών της Προσχολικής Εκπαίδευσης: μια ερευνητική ματιά
Creators: name: Τσαλαγιώργου, Ελένη
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The paper discusses the introduction and implementation of the new language curriculum in Greek preschool education. It closely examines the 'actors and dynamics involved in this specific process of curriculum change. The dynamics that were identified by teachers and School Advisers as important in the process of change could be assigned to each of four different levels of the implementation procedure, i.e. the national, local, school and personal levels. The discussion focuses on special aspects of teachers' professional lives, such as teacher development, school culture, school leadership and teachers' personal theorizing. Special reference is made to the importance of local context and culture in a process of implementation.
description: Παιδαγωγική Επιθεώρηση, Vol. 39 (2005)
Αποτίμηση και ανακατασκευή διατηρητέου πολυώροφου κτιρίου οπλισμένου σκυροδέματος
Creators: name: Μπατσικώστα, Ελένη Λάμπρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Αποτίμηση
Ανακατασκευή
Διατηρητέο κτίριο οπλισμένου σκυροδέματος
Assessment
Reconstruction
Historic reinforced concrete building

description: Αντικείμενο της παρούσας διπλωματικής εργασίας είναι η αποτίμηση υφιστάμενου διατηρητέου κτιρίου οπλισμένου σκυροδέματος, με εφαρμογή γραμμικών μεθόδων ανάλυσης σύμφωνα με τις σχετικές διατάξεις του Κανονισμού Επεμβάσεων (ΚΑΝ.ΕΠΕ.) και στη συνέχεια η ανακατασκευή αυτού. Αρχικά συγκεντρώθηκαν τα ιστορικά και κατασκευαστικά χαρακτηριστικά του κτιρίου ενώ έγινε επιλογή των κατάλληλων κανονιστικών διατάξεων του Κανονισμού Επεμβάσεων (ΚΑΝ.ΕΠΕ 2012, 1η Αναθεώρηση Ιουλίου 2013) σύμφωνα με τις οποίες πραγματοποιήθηκε η διαδικασία της αποτίμησης. Στη συνέχεια δημιουργήθηκε το υπολογιστικό προσομοίωμα του φορέα και αποτιμήθηκε η στατική του επάρκεια. Ως αποτέλεσμα, ακολούθησε η ανακατασκευή του εσωτερικού φέροντα οργανισμού του κτιρίου, θεωρώντας την καθαίρεση του υφιστάμενου, με διατήρηση των διατηρητέων όψεων και σύνδεσή τους με τα νέα δομικά στοιχεία σκυροδέματος. Για το σκοπό αυτό απαραίτητη ήταν η προσωρινή αντιστήριξη των όψεων αυτών. Στα πλαίσια της ανακατασκευής του κτιρίου και της προσωρινής αντιστήριξης των όψεων, συντάχθηκαν κατάλληλα κατασκευαστικά σχέδια. Τέλος, γίνεται μια προσπάθεια οικονομοτεχνικής αξιολόγησης της λύσης αυτής της ανακατασκευής του κτιρίου συγκρινόμενη με την λύση ανασχεδιασμού μέσω ενισχύσεων αυτού, που μελετήθηκε από την Πολιτικό Μηχανικό Ζησοπούλου Ε. κατά την μεταπτυχιακή διπλωματική της εργασία.
description: The scope of this thesis is the assessment of a listed reinforced concrete building applying linear methods of analysis, according to the Greek Structural Intervention Code (KAN.EPE.), and subsequently the reconstruction of the former. At first, historical and structural information of the building as well as the appropriate regulations of the Greek Structural Intervention Code( KAN.EPE. 2012 – 1st review of July 2013) were collected, according to which the assessment process was conducted. Thereafter, the computational model of the building was designed and its static adequacy was evaluated. As a result, the interior structure of the building was reconstructed, assuming that the old construction was demolished, while maintening the listed facades and connecting them with the new concrete components. For this purpose the temporary bracing of these facades was necessary. As part of the reconstruction of the building and the temporary retaining of the facades, construction drawings were designed. Finally, an attempt was made to evaluate the feasibility of this reconstruction solution compared with the redesign solution, which was studied by the Civil Engineer Zisopoulou E. at her postgraduate thesis.
Automatic classification of plasma regions in near-Earth space with supervised machine learning: application to Magnetospheric Multi Scale 2016-2019 observations
Creators: name: Breuillard, Hugo
name: Dupuis, Romain
name: Retino, Alessandro
name: Contel, Olivier Le
name: Amaya, Jorge
name: Lapenta, Giovanni
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: The proper classification of plasma regions in near-Earth space is crucial to perform unambiguous statistical studies of fundamental plasma processes such as shocks, magnetic reconnection, waves and turbulence, jets and their combinations. The majority of available studies have been performed by using human-driven methods, such as visual data selection or the application of predefined thresholds to different observable plasma quantities. While human-driven methods have allowed performing many statistical studies, these methods are often time-consuming and can introduce important biases. On the other hand, the recent availability of large, high-quality spacecraft databases, together with major advances in machine-learning algorithms, can now allow meaningful applications of machine learning to in-situ plasma data. In this study, we apply the fully convolutional neural network (FCN) deep machine-leaning algorithm to the recent Magnetospheric Multi Scale (MMS) mission data in order to classify ten key plasma regions in near-Earth space for the period 2016-2019. For this purpose, we use available intervals of time series for each such plasma region, which were labeled by using human-driven selective downlink applied to MMS burst data. We discuss several quantitative parameters to assess the accuracy of both methods. Our results indicate that the FCN method is reliable to accurately classify labeled time series data since it takes into account the dynamical features of the plasma data in each region. We also present good accuracy of the FCN method when applied to unlabeled MMS data. Finally, we show how this method used on MMS data can be extended to data from the Cluster mission, indicating that such method can be successfully applied to any in situ spacecraft plasma database.
description: 18 pages, 6 figures
Formation energy and interaction of point defects in two-dimensional colloidal crystals
Creators: name: DaSilva, L. C.
name: Candido, L.
name: Costa, L. da F.
name: Oliveira, O. N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The manipulation of individual colloidal particles using optical tweezers has allowed vacancies to be created in two-dimensional (2d) colloidal crystals, with unprecedented possibility of real-time monitoring the dynamics of such defects (Nature {\bf 413}, 147 (2001)). In this Letter, we employ molecular dynamics (MD) simulations to calculate the formation energy of single defects and the binding energy between pairs of defects in a 2d colloidal crystal. In the light of our results, experimental observations of vacancies could be explained and then compared to simulation results for the interstitial defects. We see a remarkable similarity between our results for a 2d colloidal crystal and the 2d Wigner crystal (Phys. Rev. Lett. {\bf 86}, 492 (2001)). The results show that the formation energy to create a single interstitial is $12% - 28%$ lower than that of the vacancy. Because the pair binding energies of the defects are strongly attractive for short distances, the ground state should correspond to bound pairs with the interstitial bound pairs being the most probable.
description: 5 pages, 2 figures
Οι ιδέες των μαθητών για την ιστοσελίδα και η σημασία τους για την διδασκαλία
Creators: name: Σπηλιωτοπούλου, Βάσω
name: Καρατράντου, Ανθή
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: This paper focuses on secondary student's experiences about internet. Students experience a technological reality in their everyday life and they also are taught about it in their schools. As a result, they develop thoughts and beliefs concerning the different services provided by internet. We study, here students' conceptualizations of the World Wide Web and more specifically of the use of WebPages. This is part of their curriculum of the subject called informatics. Students' experiences and conceptualizations are studied by means of two research tasks that used before the typical school teaching. Models and categories of aspects in their answers are presented and discussed. Students seem to have some knowledge form everyday experience or from previous teaching, but their ideas are fragmented and deficient. The specific characteristics that students' thinking presents and observations based on the content of their books led to the development of a teaching intervention that is based on the introduction of the concept of "system". First experiences from the use of this intervention in the classroom, are also discussed.
description: Παιδαγωγική Επιθεώρηση, Vol. 39 (2005)
Research and economic evaluation of the impact of current challenges and threats on the functioning of economic systems
Creators: name: Britchenko, Igor
name: Bezpartochnyi, Maksym
name: Bezpartochna, Olesia
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 460904
subject: Information security management
classificationCode: 380101
subject: Agricultural economics
classificationCode: 380399
subject: Economic theory not elsewhere classified

description: Resilience to withstand the destructive impact of the external environment and modern challenges contributes to ensure the economic security of the company. The consequences of the pandemic, military actions in Ukraine, rising inflation, and the transformation of geopolitical processes in the European Union have negatively affected the economic security of insurance companies in Slovakia. The purpose 10 of the study is to assess the economic security of Slovak insurance companies. The study is based on the analysis of profitability, assets and liabilities, premiums, claims and expenses of insurance companies in Slovakia. The forecasting methodology is applied and various scenarios of further functioning of insurance companies in Slovakia, proposed by the National Bank of Slovakia, are analyzed. Insurance companies in Slovakia have sufficient capital, losses in the forecast period can be covered by current profits, and the growth of insurance claims can be transferred to reinsurers. The study found that insurance companies in Slovakia to ensure stability and economic security, and have prospects for further operation and development.
The microscopic origins of stretched exponential relaxation in two model glass-forming liquids as probed by simulations in the isoconfigurational ensemble
Creators: name: Vela, Daniel Diaz
name: Simmons, David S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The origin of stretched exponential relaxation in supercooled glass-forming liquids is one of the central questions regarding the anomalous dynamics of these fluids. The dominant explanation for this phenomenon has long been the proposition that spatial averaging over a heterogeneous distribution of locally exponential relaxation processes leads to stretching. Here we perform simulations of model polymeric and small-molecule glass-formers in the isoconfigurational ensemble to show that stretching instead emerges from a combination of spatial averaging and locally nonexponential relaxation. Results indicate that localities in the fluid exhibiting faster-than-average relaxation tend to exhibit locally stretched relaxation, whereas slower-than-average relaxing domains exhibit compressed exponential relaxation. We show that local stretching is predicted by loose local caging, as measured by the Debye-Waller factor, and vice versa. This phenomenology in the local relaxation of in-equilibrium glasses parallels the dynamics of out of equilibrium under-dense and over-dense glasses, which likewise exhibit an asymmetry in their degree of stretching vs compression. On the basis of these results, we hypothesize that local stretching and compression in equilibrium glass-forming liquids results from evolution of particle mobilities over a single local relaxation time, with slower particles tending towards acceleration and vice versa. In addition to providing new insight into the origins of stretched relaxation, these results have implications for the interpretation of stretching exponents as measured via metrologies such as dielectric spectroscopy: measured stretching exponents cannot universally be interpreted as a direct measure of the breadth of an underlying distribution of relaxation times.
description: 11 pages, 12 figures. This article has been submitted to the Journal of Chemical Physics. After it is published, it will be found at https://aip.scitation.org/journal/jcp
Εισοδηματικές Ανισότητες και η Αραβική Άνοιξη. Μια εμπειρική διερεύνηση
Creators: name: Πρόιος Χρήστος, Μιχαήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Αραβική Άνοιξη
Ανισότητα
Οικονομική Μεγέθυνση
Arab Spring
Inequality
Economic Growth

description: Η Αραβική άνοιξη γεννήθηκε κυρίως από την έντονη ανισοκατανομή του εισοδήματος, η οποία δημιούργησε πολιτική αστάθεια με αποτέλεσμα την ανατροπή των αυταρχικών καθεστώτων. Στην παρούσα εργασία θα αναφερθούμε στις διαστάσεις της ανισότητας στις οικονομίες της Βορείου Αφρικής και Μέσης Ανατολής (ΧΒΑΜΑ) και θα επικεντρωθούμε στις εισοδηματικές ανισότητες καθώς και στους τρόπους μέτρησης αυτών. Αρχικά χρησιμοποιώντας δυο οικονομετρικά υποδείγματα με panel data θα δείξουμε πρώτον ότι υψηλή ανισοκατανομή του εισοδήματος οδηγεί σε πολιτική αστάθεια. Στην συνέχεια θα δείξουμε ότι η πολιτική αστάθεια έχει αρνητική επίπτωση στην οικονομική μεγέθυνση, όχι μόνο σε ανεπτυγμένες οικονομίες, αλλά και σε αναπτυσσόμενες οικονομίες της Βορείου Αφρικής και Μέσης Ανατολής (ΧΒΑΜΑ), όπως οι χώρες Αίγυπτος, Συρία, Τυνησία και Υεμένη.
description: The Arab Spring was born mainly by strong inequalities of income, which created political instability resulting in the overthrow of authoritarian regimes. In this paper we will refer to the dimensions of inequality in the economies of North Africa and Middle East (CΝΑΜΑ) and we will focus on income inequality and the ways we can measure it. Initially, using two econometrical models with panel data, we will show firstly that highly unequal distribution of income leads to political instability. Then, we will prove that the political instability has a negative impact on economic growth, not only in developed economies but also in developing economies of North Africa and Middle East (CΝΑMA), such as Egypt, Syria, Tunisia and Yemen.
Reply to Comments of Bassi, Ghirardi, and Tumulka on the Free Will Theorem
Creators: name: Conway, John
name: Kochen, Simon
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that the authors in the title have erred in claiming that our axiom FIN is false by conflating it with Bell locality. We also argue that the predictions of quantum mechanics, and in particular EPR, are fully Lorentz invariant, whereas the Free Will Theorem shows that theories with a mechanism of reduction, such as GRW, cannot be made fully invariant.
description: We sharpen our theorem by replacing axiom FIN by a weaker axiom MIN to answer the above authors' objections
Cohomological gauge theory, quiver matrix models and Donaldson-Thomas theory
Creators: name: Cirafici, Michele
name: Sinkovics, Annamaria
name: Szabo, Richard J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study the relation between Donaldson-Thomas theory of Calabi-Yau threefolds and a six-dimensional topological Yang-Mills theory. Our main example is the topological U(N) gauge theory on flat space in its Coulomb branch. To evaluate its partition function we use equivariant localization techniques on its noncommutative deformation. As a result the gauge theory localizes on noncommutative instantons which can be classified in terms of N-coloured three-dimensional Young diagrams. We give to these noncommutative instantons a geometrical description in terms of certain stable framed coherent sheaves on projective space by using a higher-dimensional generalization of the ADHM formalism. From this formalism we construct a topological matrix quantum mechanics which computes an index of BPS states and provides an alternative approach to the six-dimensional gauge theory.
description: 65 pages, 1 figure; v2: References added; v3: Definitions of moduli spaces clarified, references added; Final version to be published in Nuclear Physics B
One and two-dimensional NMR characterization of organofunctionalized silica gels
Creators: name: Aroca, Patricia Paulina
Publisher: name: University of British Columbia
Year: 2009

description: An alternative preparation is proposed in this thesis for the synthesis of organofunctionalized silica gels based on the copolymerization of tetraethoxysilane (TEOS) and an organofunctionalized triethoxysilane. The principal analytical techniques used to determine the integrity and distribution of the functionality in the copolymer matrix were solution and solid state NMR. The model copolymer chosen for these studies is methyltriethoxysilane (MTES)/TEOS. One-dimensional 29Si solid state NMR was used to establish the integrity of the system and relative proportions of the different silicon environments present. Two-dimensional ¹H-29Si heteronuclear correlation NMR experiments unambiguously demonstrated that the monomers in the copolymer were “mixed and not phase-separated. To quantify the extent of mixing of the two monomers in the copolymer, kinetic studies were undertaken with the objective of determining reactivity ratios for each monomer. The acid catalyzed hydrolysis and dimer formation reactions of the TEOS and MTES monomers were characterized at a number of catalyst concentrations in order to determine the pH independent kinetic rate constants. With both homopolymers well characterized, the hydrolysis and dimer formation kinetic rate constants were determined for the copolymer. From these kinetic data reactivity ratios were calculated which suggest that the MTES/TEOS system tends to form a random copolymer. One interesting possible application of organofunctionalized silica gels is in the manufacturing of low temperature functionalized glasses. The synthesis of large pieces of glasses from the copolymerization of TEOS and MTES requires the usage of a drying chemical control agent (DCCA) to prevent cracking. The most commonly used DCCA is formamide. Solution NMR was used to determine the integrity and interaction of formamide in the polymerization process. Another step taken to characterize the suitability of these compounds for the manufacturing of low temperature functionalized glasses was to characterize the thermal stability of numerous organic functionalities by thermal analysis techniques and NMR. Of all the functionalities studied the methyl group had the highest thermal stability, up to 700°C when thermally treated under nitrogen, showing promise for the synthesis of methyl functionalized glasses. The cross polarization (CP) dynamics of a number of MTES/TEOS copolymers were then studied, to determine the distance range between the methyl group and the fully condensed unfunctionalized silane (Si(OSi)4). These results further support the conclusion that the functionality in the MTES/TEOS copolymer is quite evenly distributed throughout the copolymer matrix. [Scientific formulae used in this abstract could not be reproduced.]
Discovering novel cancer bio-markers in acquired lapatinib resistance using Bayesian methods
Creators: name: Azad, AKM
name: Alyami, Salem
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Genes/Proteins do not work alone within our body, rather as a group they perform certain activities indicated as pathways. Signalling transduction pathways (STPs) are some of the important pathways that transmit biological signals from protein-to-protein controlling several cellular activities. However, many diseases such as cancer target some of these signalling pathways for their growth and malignance, but demystifying their underlying mechanisms are a very complicated tasks. In this study, we use a fully Bayesian approach to develop methodologies in discovering novel driver bio-markers in aberrant STPs given two-conditional high-throughput gene expression data. This project, namely PathTurbEr (Pathway Perturbation Driver), is applied on a global gene expression dataset derived from the lapatinib (an EGFR/HER dual inhibitor) sensitive and resistant samples from breast cancer cell lines (SKBR3). Differential expression analysis revealed 512 differentially expressed genes (DEGs) and their signalling pathway enrichment analysis revealed 22 singalling pathways as aberrated including PI3K-AKT, Hippo, Chemokine, and TGF-beta singalling pathway as highly dysregulated in lapatinib resistance. Next, we model the aberrant activities in TGF-beta STP as a causal Bayesian network (BN) from given observational datasets using three Markov Chain Monte Carlo (MCMC) sampling methods, i.e. Neighbourhood sampler (NS) and Hit-and-Run (HAR) sampler, which has already proven to have more robust inference with lower chances of getting stuck at local optima and faster convergence compared to other state-of-art methods. Next, we examined the structural features of the optimal BN as a statistical process that generates the global structure using, $p_1$-model, a special class of Exponential Random Graph Models (ERGMs) and MCMC methods for their hyper-parameter sampling....
Μορφολογία της κυριλλικής γραφής στις επιγραφές από την εμφάνισή της έως τα τέλη του 12ου αιώνα
Creators: name: Kostic, Elena (Κόστιτς, Ελενα) Tihomir
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Κυριλλική
Επιγραφική
Μορφολογία
Cyrillic
Epigraphy
Morphology

description: Η εργασία έχει ως θέμα τη μορφολογία της γραφής στις αυτοχρονολογούμενες κυριλλικές επιγραφές από τα τέλη του 9ου έως τα τέλη του 12ου αιώνα σε όλη την επικράτεια της εξάπλωσής της κυριλλικής γραφής. Περιλαμβάνει 27 επιγραφές οι οποίες για πρώτη φορά μελετήθηκαν ως ένα αδιάσπαστο σύνολο. Από τη μελέτη προκύπτουν οι χρονολογικοί πίνακες οι οποίοι περιλαμβάνουν τους βασικούς τύπους χαρακτήρων απ’ όλες τις επιγραφές κατά χρονολογική σειρά με στόχο τη συνεισφορά σε ποικίλες αρχαιολογικές εκτιμήσεις, καθώς και στην κατά προσέγγιση χρονολογική ένταξη άλλων αχρονολόγητων μνημείων που φέρουν επιγραφές.
description: The subject of the present dissertation is the morphology of the scripture in self-dated Cyrillic inscriptions from the late 9th to the end of 12th century coming from the area where Cyrillic alphabet was spread. It includes 27 inscriptions, studied for first time as an inseparable ensemble. The study contains chronological tables which include basic character types from all inscriptions set on a chronological basis, in order to be used as archaeological indications, as well as to contribute to the dating of non – dated monuments which preserve inscriptions.
Realizing highly entangled states in asymmetrically coupled three NV centers at room temperature
Creators: name: Mahony, Declan
name: Bhattacharyya, Somnath
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Despite numerous efforts the coupling between randomly arranged multi-NV centers and also resonators has not been improved significantly mainly due to our limited knowledge of their entanglement times (2t_ent). Here, we demonstrate a very strong coupling between three-NV centers by using a simulated triple electron-electron resonance experiment based on a new quantum (U_C) gate on IBM quantum simulator with 2t_ent ~12.5 microsecond arranged is a triangular configuration. Interestingly through breaking the symmetry of couplings an even lower 2t_ent ~6.3 μs can be achieved. This simulation not only explains the luminescence spectra in recently observed three-NV centers [Haruyama, Nat. Commun. 2019] but also shows a large improvement of the entanglement in artificially created structures through a cyclic redistribution of couplings. Realistically disordered coupling configurations of NV centers qubits with short time periods and high (0.89-0.99) fidelity of states clearly demonstrate possibility of accurate quantum registers operated at room temperature.
A scheduling algorithm for networked control systems
Creators: name: Kundu, Atreyee
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper deals with the design of scheduling logics for Networked Control Systems (NCSs) whose shared communication networks have limited capacity. We assume that among \(N\) plants, only \(M\:(< N)\) plants can communicate with their controllers at any time instant. We present an algorithm to allocate the network to the plants periodically such that stability of each plant is preserved. The main apparatus for our analysis is a switched systems representation of the individual plants in an NCS. We rely on multiple Lyapunov-like functions and graph-theoretic arguments to design our scheduling logics. The set of results presented in this paper is a continuous-time counterpart of the results proposed in [15]. We present a set of numerical experiments to demonstrate the performance of our techniques.
description: 15 pages, 3 figures. A continuous-time counterpart of our earlier result on scheduling of networked control systems. arXiv admin note: substantial text overlap with arXiv:1901.08353, arXiv:2010.08447
Adaptive pruning-based optimization of parameterized quantum circuits
Creators: name: Sim, Sukin
name: Romero, Jonathan
name: Gonthier, Jerome F.
name: Kunitsa, Alexander A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Variational hybrid quantum-classical algorithms are powerful tools to maximize the use of Noisy Intermediate Scale Quantum devices. While past studies have developed powerful and expressive ansatze, their near-term applications have been limited by the difficulty of optimizing in the vast parameter space. In this work, we propose a heuristic optimization strategy for such ansatze used in variational quantum algorithms, which we call "Parameter-Efficient Circuit Training" (PECT). Instead of optimizing all of the ansatz parameters at once, PECT launches a sequence of variational algorithms, in which each iteration of the algorithm activates and optimizes a subset of the total parameter set. To update the parameter subset between iterations, we adapt the dynamic sparse reparameterization scheme by Mostafa et al. (arXiv:1902.05967). We demonstrate PECT for the Variational Quantum Eigensolver, in which we benchmark unitary coupled-cluster ansatze including UCCSD and k-UpCCGSD, as well as the low-depth circuit ansatz (LDCA), to estimate ground state energies of molecular systems. We additionally use a layerwise variant of PECT to optimize a hardware-efficient circuit for the Sycamore processor to estimate the ground state energy densities of the one-dimensional Fermi-Hubbard model. From our numerical data, we find that PECT can enable optimizations of certain ansatze that were previously difficult to converge and more generally can improve the performance of variational algorithms by reducing the optimization runtime and/or the depth of circuits that encode the solution candidate(s).
Λεκτική επιθετικότητα των καθηγητών Τριτοβάθμιας Εκπαίδευσης
Creators: name: Μπεκιάρη, Αλεξάνδρα
name: Κουστέλιος, Αθανάσιος
name: Κοκαρίδας, Δημήτρης
name: Σακελαρίου, Κίμων
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The purpose of this study was to examine teachers' use of verbal aggressiveness in Universities as perceived by the students. The sample constituted of 327 undergraduate students (144 men and 183 women) from the University of Athens, Greece. Verbal aggressive behavior was examined in terms of attacks on competence, character or background, teasing, ridicule, threats, swearing, profanity and nonverbal emblems, the findings of the study revealed an increased level of verbal aggression that exists among teachers in Greek Universities. Future research in nationwide sample is needed in order to explain better the concept of verbal aggression among Greek University teachers.
description: Παιδαγωγική Επιθεώρηση, Vol. 39 (2005)
Gravitational Faraday Rotation in Binary Pulsar Systems
Creators: name: Ruggiero, Matteo Luca
name: Tartaglia, Angelo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the gravitational Faraday rotation, on linearly polarized light rays emitted by a pulsar, orbiting another compact object. We relate the rotation angle to the orbital phase of the emitting pulsar, as well as to other parameters describing its orbit and the orientation of the angular momentum of the binary companion. We give numerical estimates of the effect for the double-pulsar system PSR J0737-3039, and we note that the expected magnitude is exceedingly small, making the effect unlikely to be observed with present technology. It is however interesting per se, since in this phenomenon, gravito-magnetism plays a leading role, unlike what happens, for instance, when studying light bending or gravitational time delay, where it appears as a correction to the gravito-electric contribution. Also, we envisage the possibility that this effect could be relevant, at least in principle, for a pulsar orbiting a non charged black-hole.
description: 6 pages, 3 figures, minor revision; to appear in MNRAS
Παρέμβαση με χρήση μικρών δομημένων ιστοριών για τη βελτίωση των δεξιοτήτων συγγραφής μιας σύντομης έκθεσης ιδεών από ένα παιδί με Asperger
Creators: name: Κωνσταντίνου, Κλέα
name: Αγγελίδης, Παναγιώτης
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: Asperger syndrome was only officially recognized as a disorder in 1994 when it was included in the Diagnostic and Statistical Manual of Mental Disorders published by the American Psychiatric Association. Therefore, it is not surprising that little research has been conducted on appropriate and effective treatments of this unique population. Educational interventions for children with Asperger were designed as these children were autistic. However, it is clear in the research literature that children with Asperger have different characteristics and different needs from children with autism. This paper presents the use of a small structured story intervention to improve the skills of writing a short essay by a child with Asperger Syndrome. Presenting problems, history and assessment of the child are analyzed, the intervention program is explained and the results of this intervention are described. Finally, an evaluation of the program, implications for intervention and recommendations for practitioners are included.
description: Παιδαγωγική Επιθεώρηση, Vol. 39 (2005)