cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dipolar Particles in General Relativity
Creators: name: Blanchet, Luc
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The dynamics of "dipolar particles", i.e. particles endowed with a four-vector mass dipole moment, is investigated using an action principle in general relativity. The action is a specific functional of the particle's world line, and of the dipole moment vector, considered as a dynamical variable. The first part of the action is inspired by that of a particle with spin moving on an arbitrary gravitational background. The second part is intended to describe, at some effective level, the internal non-gravitational force linking together the "microscopic" constituents of the dipole. We find that some solutions of the equations of motion and evolution of the dipolar particles correspond to an equilibrium state for the dipole moment in a gravitational field. Under some hypothesis we show that a fluid of dipolar particles, supposed to constitute the dark matter, reproduces the modified Newtonian dynamics (MOND) in the non relativistic limit. We recover the main characteristics of a recently proposed quasi-Newtonian model of "gravitational polarization".
description: 33 pages, 6 figures, to appear in Classical and Quantum Gravity
A model for auditory lateralization in non-stationary multi-source environments
Creators: name: Shu, Zhengjin
Publisher: name: University of British Columbia
Year: 2009

description: The problem addressed in this thesis is the determination of the positions of sound sources in non-stationary multi-source environments. This problem is approached by developing models that mimic the processing of sounds by the auditory system. It is well known that in the localization process the auditory system utilizes interaural intensity and time differences (lID and ITD) and the interaural envelope delay (lED). However, the way such cues are estimated and organized by the auditory system in non-stationary multi-source situations is not known. It is argued in this thesis that the auditory localization process can be divided into three serial processing stages: decomposition, localization, and integration (DLI). Specifically, the signals detected by the two ears are first decomposed into their spectro-temporal distributions as represented in the neural activities of the auditory nerve fibers. Short-time spatial attributes, in terms of the localization cues, are then determined from energy concentrations in these distributions. A spatial scene of acoustic events is finally built by integrating the energy concentrations according to their spatial attributes. A unique DLI model is proposed in which short-time cue estimation is realized by a process of pattern recognition and comparison using neural networks, and the spatial scene is represented by short-time cue distributions. Three implementations of the DLI model, which model separate auditory pathways responsible for three different types of cue sensitivity (11D, lTD. and lED) observed in the auditory system, are developed, and their performance in estimating short-time cue distributions are studied by computer simulation. It is shown that there are unexplored patterns in the neural signals carried by the auditory nerve fibers that are important for auditory localization. These patterns are shown to contain good indications of interaural differences, and can be used to obtain robust short-time cue estimates by training neural networks that have relatively simple structures. Furthermore, while such networks can be trained using the simplest types of inputs, they show the ability to generalize and perform well with more complex stimuli. It is demonstrated that the model works well in noise and in non-stationary multi-source situations. The same model structure can be trained to estimate different localization cues, suggesting that the underlying structure of the different pathways responsible for different types of cue sensitivities in the auditory system may not necessarily be different. The receptive connection patterns of the hidden neurons in the model indicate that the spectro-temporal response properties of binaural neurons in the auditory system may play an important role in auditory localization, and that excitatory and inhibitory inputs to the binaural neurons play equally important roles in localization.
Περιγραφή Οπτικοακουστικού Περιεχομένου και Τεχνικές Ανάλυσης
Creators: name: Στεργίου, Ευάγγελος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Πολυμεσικό Περιεχόμενο
Ανάλυση Βίντεο
Πρότυπο MPEG-7
Multimedia Content
Video Analysis
MPEG-7 Standard

description: Σκοπός της διατριβής ήταν η μελέτη των τεχνικών διαχείρισης καταγραφών πολυμεσικού περιεχομένου και συγκεκριμένα τα εργαλεία που περιγράφουν οπτικοακουστικό περιεχόμενο σύμφωνα με το MPEG-7 πρότυπο. Επίσης παρουσιάζονται οι τεχνικές περίληψης βίντεο και συγκεκριμένα η τεχνική της εξαγωγής των χαρακτηριστικών εικονοπλαισίων. Τέλος με την ανάπτυξη μιας εφαρμογής με βάση τη γλώσσα προγραμματισμού C++ παρουσιάζονται τα εργαλεία του MPEG-7 για την περιγραφή πολυμεσικού περιεχομένου που αφορά το βίντεο. Τα εξαγώμενα αποτελέσματα που προκύπτουν από την εφαρμογή αποθηκεύονται σε αρχεία .xml ή .txt και μπορούν να χρησιμοποιηθούν περαιτέρω για μεγαλύτερη ανάλυση και περιγραφή του πολυμεσικού περιεχομένου μέσα από την κατάλληλη εισαγωγή τους σε άλλες εφαρμογές.
description: The aim of the present thesis was to present the techniques of describing multimedia content and more specific the tools that describe the audio and visual characteristics based on MPEG-7 standard. Moreover, video summary techniques are analysed such as the key-frame extraction technique. MPEG’s – 7 tools that concern video, are included in an application based on C++ programming language with the results of the descriptors to be saved in txt or xml files for further analysis and description of the multimedia content.
description: Σε συνεργασία με το τμήμα Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
Phase information revealed by interferences in the ionization of rotational wave packets
Creators: name: Charron, Eric
name: Raoult, Maurice
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Time-resolved photoelectron spectra are proposed for the measurement of classical information recorded in the quantum phases of a molecular rotational wave packet. Taking Li2 as a prototypical system, we show that an interference arises from the electron-nuclei entanglement induced by the molecular anisotropy. This phenomenon is used to transfer the information that was stored initially in the nuclear rotational degree of freedom into the electronic degree of freedom.
Διεπιστημονική μελέτη και ερμηνεία της τοπικής αρχιτεκτονικής κληρονομίας από μαθητές Γ' γυμνασίου: διδακτικά προβλήματα και μαθησιακά επιτεύγματα
Creators: name: Καμαρινού, Δ.
name: Παπούλια-Τζελέπη, Π.
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1999

description: The aim of this research is to investigate the capabilities of Greek pupils of 9lh grade to study and explain the local architectural heritage in an interdisciplinary framework. The pa¬per presents the implementation of an innovative programme devised ad hoc as part of the environmental education, and the on going collaborate formative evaluation from cooperat¬ing teachers and the researcher. Finally the related leaching problems and learning achieve¬ment are discussed in relation to the conditions of the Greek educational systems and (he particular circumstances of the cooperating schools, In view findings, recommendations are presented concerning teaching interventions and organization of the curriculum.
description: Παιδαγωγική Επιθεώρηση, Vol. 29 (1999)
Curing the unphysical behaviour of NLO quarkonium production at the LHC and its relevance to constrain the gluon PDF at low scales
Creators: name: Lansberg, Jean-Philippe
name: Ozcelik, Melih Arslan
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We address the unphysical energy dependence of quarkonium-hadroproduction cross sections at Next-to-Leading Order (NLO) in alpha_S which we attribute to an over-subtraction in the factorisation of the collinear singularities inside the PDFs in the MSbar scheme. Such over- or under-subtractions have a limited phenomenological relevance in most of the scattering processes in particle physics. On the contrary, it is particularly harmful for P_T-integrated charmonium hadroproduction which renders a wide class of NLO results essentially unusable. Indeed, in such processes, alphaS is not so small, the PDFs are not evolved much and can be rather flat for the corresponding momentum fractions and, finally, some process-dependent NLO pieces are either too small or too large. We propose a scale-fixing criterion which avoids such an over-subtraction. We demonstrate its efficiency for eta(c,b) but also for a fictitious light elementary scalar boson. Having provided stable NLO predictions for eta(c,b) P_T-integrated cross sections, sigma^NLO(eta(Q)), and discussed the options to study eta(b) hadroproduction, we argue that their measurement at the LHC can help better determine the gluon PDF at low scales and tell whether the local minimum in conventional NLO gluon PDFs around x=0.001 at scales below 2 GeV is physical or not.
description: LaTeX, 23 pages, 58 figures, 1 table
Calculation of the two-photon decay width of the f_0(980) scalar meson
Creators: name: Lemmer, R. H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The applicability of the quasi-static approximation for calculating the two-photon annihilation rate of the scalar f_0(980) meson envisaged as a K\bar K molecule is critically re-examined. It is shown that the validity of this approximation depends on the detailed interplay between the momentum dependence of the annihilation amplitude and the momentum transform of the bound state wave function of the annihilating pair. The approximation becomes invalid when these two scales of variation are similar. An improved method of calculation based on the inclusion of electromagnetic corrections to the kernel of the Bethe-Salpeter equation for the interacting K\bar K pair is outlined to cover this case and applied to re-evaluate the two-photon decay width for f_0(980) in a one boson exchange model for the interkaon interaction. The corrections are significant and result in a much better agreement with experiment.
description: 14 pages, 3 figures. Fig.3 replaced. Additional remarks with references
Ιδιάζοντα λειτουργικά έθιμα της «Λαϊκής Λατρείας» της Κύπρου
Creators: name: Δαμιανού, Δαμιανός Χριστάκη
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Λαϊκή Λατρεία
Λειτουργικά Έθιμα
Κύπρος
Folk Worship
Liturgical customs
Cyprus

description: Σκοπός της παρούσας μεταπτυχιακής εργασίαςήταν η μελέτητων ιδιαζόντων λειτουργικών εθίμων της «Λαϊκής Λατρείας» της Κύπρου. Εξετάσαμε την ορολογία που χρησιμοποιείται για την έννοια της «Λαϊκής Λατρείας» τη σχέση λειτουργικών εθίμων και θεσμικής λατρείας καθώς και τις επιδράσεις στην καθ’ ημέρα ζωή καιτη λειτουργική βίωση. Στη συνέχεια παρουσιάσαμε αναλυτικά αυτά τα έθιμα στον Εορταστικό Κύκλο (Χριστούγεννα-Θεοφάνεια, Μεγάλη Τεσσαρακοστή-Πάσχα, Δεσποτικές Εορτές, Θεομητορικές Εορτές, εορτές Αγίων και Λαϊκές Αγρυπνίες), στα Άγια Μυστήρια (Γέννηση-Λοχείας, Βάπτιση και Γάμος) και στη Θεία Λειτουργία. Ακόμη αναφερθήκαμε αναλυτικά στα έθιμα περί των κεκοιμημένων όπου μας απασχόλησαν τα θέματα για τους ψυχορραγούντες, η περιποίηση του νεκρού σώματος, η νεκρώσιμος ακολουθία και ταφή καθώς και τα μνημόσυνα. Παρατηρήσαμε ότι ο σχηματισμός των διαφόρων λειτουργικών εθίμων έχει να κάνει κυρίως με τη βιωματική εμπειρία της κοινωνίας των πιστών σε εκκλησιολογική, λειτουργική και ευχαριστιακή βάση. Παράλληλα προς την θεσμοθετημένη ορθόδοξη λατρεία παρατηρούμε την ύπαρξη διαφόρων ιδιαζόντων λειτουργικών εθίμων και συνηθειών αλλά ταυτόχρονα την αλληλοπεριχώρησή τους και τον αλληλοεπηρεασμό. Η αλήθεια εντούτοις καθώς και το μήνυμα της πίστεως παραμένει ένα και το αυτό αναλλοίωτο σε όλες τις λειτουργικές εκφάνσεις.
description: The purpose of this thesis was to study the peculiar liturgical customs of "Folk Worship" of Cyprus. We examined the terminology used to the concept of "Folk Worship" the relationship of liturgical and institutional traditions of worship, and its effect in the all-day life and liturgical experienced. Then analytically presented these customs in Festive Circle (Christmas-Epiphany, Lent-Easter, Festal, Marian feasts, festivals and Folk Saints Vigil), the Holy Mysteries (Birth-maternity, Baptism and Marriage) and the Divine Liturgy. Even elaborated in customs for the departed where we dealt the issues for psychorragountes, the care of the dead body, the funeral and burial and memorial services. We observed that the formation of various liturgical customs has to do mainly with the living experience of the community of believers in ecclesiological, liturgical and Eucharistic basis. Alongside the institutionalized Orthodox worship, we observe that there are several peculiar liturgical customs and habits but also their inter-embracing and inter-effect. The truth, however, and the message of faith remains one and the same invariant in all liturgical aspects.
Οι νοητικές παραστάσεις των παιδιών ηλικίας 10 έως 14 ετών για τη θρέψη των φυτών και τη φωτοσύνθεση
Creators: name: Ζόγκα, Βασιλική
name: Οικονομοπούλου, Παναγιώτα
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1999

description: The conceptions of children 10-14 years of age regarding the subject of plant nutrition and photosynthesis have been elicited by a questionnaire survey addressed to 310 students of E' grade primary and A' and C grade of junior high school. The determination of the conceptions and misconceptions was conducted by two techniques, a multiple choice test and the solution of a problem concerning photosynthesis, the results of which were compared. Our findings show that very few students understand the whole procedure of photosynthesis and its role in plant food production. The main misconception we found is that plants obtain their food from the soil. The possible influence of the textbooks on the development of relevant misconceptions is also discussed.
description: Παιδαγωγική Επιθεώρηση, Vol. 29 (1999)
Modular Hamiltonians for the massless Dirac field in the presence of a boundary
Creators: name: Mintchev, Mihail
name: Tonni, Erik
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the modular Hamiltonians of an interval for the massless Dirac fermion on the half-line. The most general boundary conditions ensuring the global energy conservation lead to consider two phases, where either the vector or the axial symmetry is preserved. In these two phases we derive the corresponding modular Hamiltonian in explicit form. Its density involves a bi-local term localised in two points of the interval, one conjugate to the other. The associated modular flows are also established. Depending on the phase, they mix fields with different chirality or charge that follow different modular trajectories. Accordingly, the modular flow preserves either the vector or the axial symmetry. We compute the two-point correlation functions along the modular flow and show that they satisfy the Kubo-Martin-Schwinger condition in both phases. The entanglement entropies are also derived.
description: 49 pages, 3 figures
Modelling The Microbial Competition Of Listeria Monocytogenes And Selected Lactic Acid Bacteria Strains In Reconstituted Milk
Creators: name: Loforte, Yara
name: Cadavez, Vasco
name: Gonzales-Barron, Ursula
Publisher: name: Zenodo
Year: 2024
Subjects: Biopreservation; coculture; Monoculture; pH; Growth kinetics; Modelling; Predictive microbiology

description: Presented as Oral Presentation and in Book of Abstracts of the 5th International Electronic Conference on Foods. 28–30 October 2024 | Online.
Schemes of Propagation Models and Source Estimators for Rumor Source Detection in Online Social Networks: A Short Survey of a Decade of Research
Creators: name: Jin, Rong
name: Wu, Weili
Publisher: name: arXiv
Year: 2021
Subjects: subject: Social and Information Networks (cs.SI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recent years have seen various rumor diffusion models being assumed in detection of rumor source research of the online social network. Diffusion model is arguably considered as a very important and challengeable factor for source detection in networks but it is less studied. This paper provides an overview of three representative schemes of Independent Cascade-based, Epidemic-based, and Learning-based to model the patterns of rumor propagation as well as three major schemes of estimators for rumor sources since its inception a decade ago.
Dynamics of (SUSY) AdS Space Isometry Breaking
Creators: name: Love, S. T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Actions governing the dynamics of the Nambu-Goldstone modes resulting from the spontaneous breaking of the SO(4,2) and $SU(2,2|1)$ isometries of five dimensional anti-de Sitter space ($AdS_{5}$) and SUSY $AdS_{5}\times S_1$ spaces respectively due to a restriction of the motion to embedded four dimensional $AdS_{4}$ space and four dimensional Minkowski space ($M_4$) probe branes are presented. The dilatonic Nambu-Goldstone mode governing the motion of the $M_4$ space probe brane into the covolume of the SUSY $AdS_5\times S_1$ space is found to be unstable. No such instablility appears in the other cases. Gauging these symmetries leads to an Einstein-Hilbert action containing, in addition to the gravitational vierbein, a massive Abelian vector field coupled to gravity.
description: 6 pages, 0 figures, to appear in Proceedings of IRGAC 2006: 2nd International Conference on Quantum Theories and Renormalization Group in Gravity and Cosmology, Barcelona
Κυρτότητα και Εφαρμογές της
Creators: name: Κούρου, Μαρία Ευάγγελου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Κυρτότητα
Κυρτά Σώματα
Κυρτά Πολύτοπα
Convexity
Convex Bodies
Convex Polytopes

description: Στην εργασία αυτή γίνεται μία παρουσίαση των βασικών ιδιοτήτων των κυρτών συνόλων καθώς και εφαρμογών που προκύπτουν μέσω της κυρτότητας. Στο πρώτο κεφάλαιο, γίνεται μία εισαγωγή της κυρτότητας σε ομοπαραλληλικούς χώρους και στο δεύτερο κεφάλαιο, παρουσιάζονται θεωρήματα της Συνδυαστικής Γεωμετρίας, τα οποία είναι ιδιαιτέρως σημαντικά στη Θεωρία της Κυρτότητας. Το τρίτο κεφάλαιο περιέχει τον ορισμό της κυρτότητας σε Ευκλείδειους χώρους, ενώ, το τέταρτο κεφάλαιο αναφέρεται στη θεωρία των κυρτών σωμάτων. Στο πέμπτο κεφάλαιο, εξετάζονται προβλήματα και εφαρμογές των κυρτών σωμάτων και τέλος, το έκτο κεφάλαιο είναι αφιερωμένο στα κυρτά πολύτοπα και πολύεδρα, καθώς και στην εξίσωση του Euler, την οποία ικανοποιούν.
description: In this thesis, we present some basic properties of convex sets along with applications that derive from convexity. In the first chapter, there is an introduction of convexity on affine spaces and some useful definitions. The second chapter contains fundamental theorems of Convex and Combinatorial Geometry and in the third chapter, we introduce convexity on Euclidean spaces. Moreover, in the fourth chapter, we investigate convexity combined with compactness of sets. The fifth chapter deals with problems regarding convex bodies, such as the Brunn-Minkowski inequality and the isoperimetric inequality, whereas, in the sixth chapter, convex polytopes and polyhedra are examined. Moreover, the Euler formula is presented for convex polytopes of dimension three or higher.
Antiferromagnetism-induced second-order nonlinear optical responses of centrosymmetric bilayer CrI$_3$
Creators: name: Gudelli, Vijay Kumar
name: Guo, Guang-Yu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Antiferromagnetism (AF) in AB'-stacked centrosymmetric bilayer (BL) CrI$_3$ breaks both spatial inversion ($P$) and time-reversal ($T$) symmetries but maintains the combined $PT$ symmetry, thus inducing novel second-order nonlinear optical (NLO) responses such as second-harmonic generation (SHG), linear electric-optic effect (LEO) and bulk photovoltaic effect (BPVE). In this work, we calculate AF-induced NLO responses of the BL CrI$_3$ based on the density functional theory with the generalized gradient approximation (GGA) plus onsite Coulomb correlation (U), i.e., the GGA+U method. Interestingly, we find that the magnetic SHG, LEO and photocurrent in the AF BL CrI$_3$ are huge, being comparable or even larger than that of the well-known nonmagnetic noncentrosymmetric semiconductors. For example, the calculated SHG coefficients are in the same order of magnitude as that of MoS$_2$ monolayer (ML), the most promising 2D material for NLO devices. The calculated LEO coefficients are almost three times larger than that of MoS$_2$ ML. The calculated NLO photocurrent in the CrI$_3$ BL is among the largest values predicted so far for the BPVE materials. On the other hand, unlike nonmagnetic semiconductors, the NLO responses in the AF BL CrI$_3$ are nonreciprocal and also switchable by rotating magnetization direction. Therefore, our interesting findings indicate that the AF BL CrI$_3$ will not only provide a valuable platform for exploring new physics of low-dimensional magnetism but also have promising applications in magnetic NLO and LEO devices such as frequency conversion, electro-optical switches, and light signal modulators as well as high energy conversion efficiency photovoltaic solar cells.
description: 10 pages, 7 figures
Kaon Electromagnetic Form Factor within the $k_T$ Factorization Formalism and It's Light-Cone Wave Function
Creators: name: Wu, Xing-Gang
name: Huang, Tao
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a systematical study on the kaon electromagnetic form factors $F_{K^{\pm},K^0,\bar{K}^0}(Q^2)$ within the $k_T$ factorization formalism, where the transverse momentum effects, the contributions from the different helicity components and different twist structures of the kaon light-cone (LC) wave function are carefully analyzed for giving a well understanding of the hard contributions at the energy region where pQCD is applicable. The right power behavior of the hard contribution from the higher helicity components and from the higher twist structures can be obtained by keeping the $k_T$ dependence in the hard amplitude. Our results show that the $k_T$ dependence in LC wave function affects the hard and soft contributions substantially and the power-suppressed terms (twist-3 and higher helicity components) make an important contribution below $Q^2\sim several GeV^2$ although they drop fast as $Q^2$ increasing. The parameters of the proposed model wave function can be fixed by the first two moments of its distribution amplitude and other conditions. By varying the first two moments $a^K_1(1GeV)$ and $a^K_2(1GeV)$ with the region of $0.05\pm0.02$ and $0.10\pm 0.05$ respectively, we find that the uncertainty of the kaon electromagnetic form factor is rather small.
description: 25 pages, 8 figures. References updated. To be published in JHEP
Σύγχρονες τάσεις της ειδικής εκπαίδευσης στο διεθνή χώρο: πρόκληση για την εκπαίδευση των εκπαιδευτικών στο Πανεπιστήμιο Κύπρου
Creators: name: Φτιάκα, Ελένη
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1999

description: The paper that follows is built on two levels. First comes the level of general debate and then that of practical choices. At the first level, I present an ideological conflict which has dominated special education in the international and particularly the Anglo-saxon world for over SO years now. The conflict is between those who speak of integration of children with special needs in the mainstream school, and those who share a dream of inclusive schooling. This part also serves as a theoretical background to the paper. On the second level. I discuss how this conflict is transported to Cypriot reality influencing both educational policy planning and initial teacher training in Cyprus. The University of Cyprus finds itself in front of the dilemma, faced with the responsibility of having to evaluate the various philosophies and take the best possible decision for Cypriot
description: Παιδαγωγική Επιθεώρηση, Vol. 29 (1999)
Objekte der Erinnerung
Creators: name: Gruber, Elisabeth
name: Schichta, Gabriele
name: Vennebusch, Jochen Hermann
name: Kirchhoff, Chassica
name: Lange-Krach, Heidrun
name: Emmendörffer, Christoph
name: Hauptmann, Christoph
name: Sallacz, Ilja
name: Theune, Claudia
name: Winkelbauer, Iris
name: Stainer, Nina
Publisher: name: Institut fuer Realienkunde des Mittelalters und der fruehen Neuzeit
Year: 2019
Subjects: Fruehe Neuzeit
Mittelalter
Kunstgeschichte
Geschichte
Maximilian I.
Memoria
History
Art History
interdisziplinaer
interdisciplinary
Materielle Kultur
Realienkunde
material culture studies
Middle Ages
Early Modern Period

description: Die vorliegende Ausgabe nimmt den 500. Todestag Kaiser Maximilians I. zum Anlass, das Thema „Gedächtnis und Gedenken“ aufzugreifen. In ihr versammeln sich Forschungsbeiträge aus den Bereichen Kunstgeschichte, Bauforschung, Museumswissenschaften, Archäologie und Geschichtswissenschaft, die sich mit der Funktion von Objekten als Medien der Erinnerung in historischen Kontexten auseinandersetzen. Mit Beiträgen von Heidrun Lange-Krach, Christoph Emmendörffer, Christoph Hauptmann, Ilja Sallacz, Chassica Kirchhoff, Nina Stainer, Jochen Vennebusch, Claudia Theune und Iris Winkelbauer. Elisabeth Gruber, Gabriele Schichta: Editorial; Jochen Hermann Vennebusch: „Du, geliebter Leser, erbarme dich zugleich unser“ – Der „Hillinus-Codex“ (Cod. 12) als mehrschichtiges Erinnerungsobjekt; Chassica Kirchhoff: Memories in Steel and Paper: A Spectacular Armor and its Representation In Early Modern Augsburg; Heidrun Lange-Krach, Christoph Emmendörffer, Christoph Hauptmann, Ilja Sallacz: Ein neuer Weg zur Stadtgeschichte – Virtual Reality im Maximilianmuseum; Claudia Theune, Iris Winkelbauer: Erinnerung an Maximilian I. auf Schloss Hanfelden in der Steiermark; Nina Stainer: Der Weg der Zeichnung. Die Handzeichnung als Medium der Kommunikation, Erinnerung und Selbstzeugnis des Bildhauers im 17. Jahrhundert;
description: MEMO Medieval and Early Modern Material Culture Online; Volume 2019 (4); Seitenzahl: x; ISSN: 2523-2932
The Hall instability of weakly ionized, radially stratified, rotating disks
Creators: name: Liverts, E.
name: Mond, M.
name: Chernin, A. D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Cool weakly ionized gaseous rotating disk, are considered by many models as the origin of the evolution of protoplanetary clouds. Instabilities against perturbations in such disks play an important role in the theory of the formation of stars and planets. Thus, a hierarchy of successive fragmentations into smaller and smaller pieces as a part of the Kant-Laplace theory of formation of the planetary system remains valid also for contemporary cosmogony. Traditionally, axisymmetric magnetohydrodynamic (MHD), and recently Hall-MHD instabilities have been thoroughly studied as providers of an efficient mechanism for radial transfer of angular momentum, and of density radial stratification. In the current work, the Hall instability against nonaxisymmetric perturbations in compressible rotating fluids in external magnetic field is proposed as a viable mechanism for the azimuthal fragmentation of the protoplanetary disk and thus perhaps initiating the road to planet formation. The Hall instability is excited due to the combined effect of the radial stratification of the disk and the Hall electric field, and its growth rate is of the order of the rotation period.
description: 15 pages, 2 figures
A Framework for Relative Biosignature Yields from Future Direct Imaging Missions
Creators: name: Tuchow, Noah
name: Wright, Jason
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence
Exoplanets
Biosignatures

description: Future exoplanet direct imaging missions, such as HabEx and LUVOIR, will select target stars to maximize the number of Earth-like exoplanets that can have their atmospheric compositions characterized. Because one of these missions' aims is to detect biosignatures, they should also consider the expected biosignature yield of planets around these stars. In this work, we develop a method of computing relative biosignature yields among potential target stars, given a model of habitability and biosignature genesis, and using a star's habitability history. As an illustration and first application of this method, we use MESA stellar models to calculate the time evolution of the habitable zone, and examine three simple models for biosignature genesis to calculate the relative biosignature yield for different stars. We find that the relative merits of K stars versus F stars depend sensitively on model choice. In particular, use of the present-day habitable zone as a proxy for biosignature detectability favors young, luminous stars lacking the potential for long-term habitability. Biosignature yields are also sensitive to whether life can arise on Cold Start exoplanets that enter the habitable zone after formation, an open question deserving of more attention. Using the case study of biosignature yields calculated for Theta Cygni and 55 Cancri, we find that robust mission design and target selection for HabEx and LUVOIR depends on: choosing a specific model of biosignature appearance with time; the terrestrial planet occurrence rate as a function of orbital separation; precise knowledge of stellar properties; and accurate stellar evolutionary histories.
description: ADS page for our paper: https://ui.adsabs.harvard.edu/abs/2020ApJ...905..108T/abstract
Les représentations sociales des enseignants sur l'engagement parental: les cas de l'engagement des parents d'origine ethnique différente
Creators: name: Τουλούπη, Κωνσταντίνα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Γονεϊκή εμπλοκή
Κοινωνικές αναπαραστάσεις
Γονείς διαφορετικής εθνικής καταγωγής
Parental involvement
Social representations
Parents of different ethnic origin

description: Ο σκοπός της συγκεκριμένης εργασίας ήταν η μελέτη των κοινωνικών αναπαραστάσεων για τη γονεϊκή εμπλοκή και ιδιαίτερα την περίπτωση της εμπλοκής των γονέων διαφορετικής εθνικής καταγωγής. Εξετάσαμε τις αναπαραστάσεις των εκπαιδευτικών για τις εμπειρίες τους από τη γονεϊκή εμπλοκή, για το βαθμό εμπλοκής των γονέων, για τις σχέσεις που υπάρχουν μεταξύ γονέων και εκπαιδευτικών, καθώς και για τις διαφορές μεταξύ ελλήνων γονέων και γονέων διαφορετικής εθνικής καταγωγής. Έπειτα, μελετήσαμε τους τρόπους εμπλοκής των γονέων, τις πρακτικές που χρησιμοποιούν για να εμπλέξουν τους γονείς αλλά και τα προβλήματα της γονεϊκής εμπλοκής. Τέλος, δώσαμε έμφαση στον αντίκτυπο της γονεϊκής εμπλοκής όσον αφορά στη σχολική επίδοση και τη σχολική συμπεριφορά των μαθητών.
description: The aim of the present research was the study of teachers’ social representations for the parental involvement and particularly the case of the involvement of parents of different ethnic origin. We examined the teachers’ representations about their experiences of the parental involvement, the degree of parental involvement, the relationships between parents and teachers, as well as about the differences between Greek parents and parents of different ethnic origin. Then we studied the ways of parental involvement, the practices that teachers use to engage them, and the problems of parental involvement. Finally we focused on the impact of parental involvement on students’ school performance and school behavior.
description: Συνεργαζόμενα Τμήματα Πανεπιστήμιο Λε Μαν (Maine France, Γαλλία)
Simultaneous description of four positive and four negative parity bands
Creators: name: Raduta, A. A.
name: Raduta, Al. H.
name: Raduta, C. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The extended coherent state model is further extended in order to describe two dipole bands of different parities. The formalism provides a consistent description of eight rotational bands. A unified description for spherical, transitional and deformed nuclei is possible. Projecting out the angular momentum and parity from a sole state, the $K^π=1^+$ band acquires a magnetic character, while the electric properties prevail for the other band. Signatures for a static octupole deformation in some states of the dipole bands are pointed out. Some properties which distinguish between the dipole band states and states of the same parity but belonging to other bands are mentioned. Interesting features concerning the decay properties of the two bands are found. Numerical applications are made for $^{158}$Gd, $^{172}$Yb, $^{228,232}$Th, $^{226}$Ra, $^{238}$U and $^{238}$Pu, and the results are compared with the available data.
description: 36 pages, 13 figures, 12 tables
Pressure-induced transition from Jeff=1/2 to S=1/2 states in CuAl2O4
Creators: name: Cho, Hwanbeom
name: Kim, Choong H.
name: Lee, Yongmoon
name: Komatsu, Kazuki
name: Cho, Byeong-Gwan
name: Cho, Deok-Yong
name: Kim, Taehun
name: Kim, Chaebin
name: Kim, Younghak
name: Koo, Tae Yeong
name: Noda, Yukio
name: Kagi, Hiroyuki
name: Khomskii, Daniel I.
name: Seoung, Donghoon
name: Park, Je-Geun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The spin-orbit entangled (SOE) Jeff-state has been a fertile ground to study novel quantum phenomena. Contrary to the conventional weakly correlated Jeff=1/2 state of 4d and 5d transition metal compounds, the ground state of CuAl2O4 hosts a Jeff=1/2 state with a strong correlation of Coulomb U. Here, we report that surprisingly Cu2+ ions of CuAl2O4 overcome the otherwise usually strong Jahn-Teller distortion and instead stabilize the SOE state, although the cuprate has relatively small spin-orbit coupling. From the x-ray absorption spectroscopy and high-pressure x-ray diffraction studies, we obtained definite evidence of the Jeff=1/2 state with a cubic lattice at ambient pressure. We also found the pressure-induced structural transition to a compressed tetragonal lattice consisting of the spin-only S=1/2 state for pressure higher than Pc=8 GPa. This phase transition from the Mott insulating Jeff=1/2 to the S=1/2 states is a unique phenomenon and has not been reported before. Our study offers a rare example of the SOE Jeff-state under strong electron correlation and its pressure-induced transition to the S=1/2 state.
description: 13 pages, 4 figures
Coping with increasing student numbers and decreasing resources in applied bioinformatics laboratory classes
Creators: name: Gaeta, Bruno Andre
Publisher: name: F1000 Research Limited
Year: 2019

description: UNSW Sydney (The University of New South Wales) has been offering undergraduate degrees in bioinformatics since 2001, including a Bachelor of Engineering (Bioinformatics Engineering) and more recently a Bachelor of Science (Bioinformatics). These degrees include a number of dedicated bioinformatics courses, some of which are focused on the application of bioinformatics towards biological research, with the others emphasizing the theory and engineering of bioinformatics software systems. The applied bioinformatics courses have made heavy use of supervised computer lab sessions where students get to apply and compare a range of bioinformatics software tools and approaches.

With the increase of popularity in these courses, supervised labs have become increasingly impractical due to lack of resources, including large enough computer laboratories and qualified tutors to supervise and mark the lab reports. This is driving a shift towards blended learning and “flipped” laboratory sessions. The supervised lab sessions are gradually being replaced by self-guided computer exercises followed by a laboratory-based consultation session where students can bring their questions to the lecturers. The self-guided exercises are implemented using the Moodle Learning Management System, allowing automatic marking and efficient student feedback at a much larger scale than in supervised laboratories.
Νεοτερικότητα μορφές λογικής και επιρροές στις διαδικασίες συγκρότησης της σχολικής γνώσης
Creators: name: Λαμνίας, Κώστας
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1999

description: In this article an attempt is being made to consider the possibility of the social construction and decentralization of rationality within the historical frame of modernity In modern western societies the, rationalization - modernization process is characterized the expansion of purposive-formal rationality which constitutes their dominant form Additionally, the uncoupling and internal differentiation of cultural value spheres shapes distinct and in Weber's terms substantive forms of rationality. However, according to Habermas, the alternative forms of rationality, through a complementary function, contributes to the construction of communicative rationality and undermines the over development of formal-purposive rationality. The above optimistic position, which pushes forward Haberma’s notions of understanding and consensus, could create possibilities for alternative functions within Bernstein’s mainly deterministic conceptual system. The multiplicity of the intermediations, that Bernstein's concept of recontextualization offers, contributes to a complementary function of alternative forms of rationality in the process of construction of school knowledge. These complementary functions indicate the concept of communicative rationality which could decrease the absolutism of formal purposive rationality in any level of the recontextualization process.
description: Παιδαγωγική Επιθεώρηση, Vol. 29 (1999)
Diffractive parton distributions from H1 data
Creators: name: Martin, A. D.
name: Ryskin, M. G.
name: Watt, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyse the latest H1 large rapidity gap data to obtain diffractive parton distributions, using a procedure based on perturbative QCD, and compare them with distributions obtained from the simplified Regge factorisation type of analysis. The diffractive parton densities and structure functions are made publically available.
description: 9 pages, 2 figures. Fortran code for diffractive parton densities and structure functions can be found at http://durpdg.dur.ac.uk/hepdata/mrw.html . Version to appear in Phys. Lett. B; final paragraph added, with curves from H1 incl.+dijet fit added to Fig.2
Είναι αποτελεσματική η διδασκαλία του ''σκέφτομαι και γράφω''
Creators: name: Παπασταμάτης, Αδαμάντιος Ι.
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1998

description: This article briefly presents the main mythological shortcomings of teaching children's writing in the Greek primary school and, adopting the social-cognitive model of teaching writing, makes the following recommendations for overcoming these shortcomings: a) Tasks from children's personal experiences, b) more available time for writing, c) planning and organization of the content, d) more instruction to children, el redrafting children's work, f) assessment of children's work, g) publishing children's work, and h) reorganization of teachers training and retraining in teaching writing.
description: Παιδαγωγική Επιθεώρηση, Vol. 29 (1999)
Ultrafast transfer and transient entrapment of photoexcited Mg electron in Mg@C60
Creators: name: Madjet, Mohamed El-Amine
name: Ali, Esam
name: Carignano, Marcelo
name: Vendrell, Oriol
name: Chakraborty, Himadri S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Electron relaxation is studied in endofullerene Mg@C60, after an initial localized photoexcitation in Mg, by nonadiabtic molecular dynamics simulations. To ensure reliability, two methods are used: i) an independent particle approach with a DFT description of the ground state and ii) HF ground state with many-body effects for the excited state dynamics. Both methods exhibit similar relaxation times leading to an ultrafast decay and charge transfer from Mg to C60 within tens of femtoseconds. Method (i) further elicits a robust transient-trap of the transferred electron that can delay the electron-hole recombination. Results shall motivate experiments to probe these ultrafast processes by two-photon transient absorption spectroscopy in gas phase, in solution, or as thin films.
description: 4,25 pages + References, 4 figures, Submitted to the Journal
Νομικές προεκτάσεις και συγκριτική μελέτη του Ισλαμικού και του συμβατικού χρηματοπιστωτικού συστήματος
Creators: name: Βασιλειάδου, Ελπίδα-Νικολέτα
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Ισλαμικό χρηματοπιστωτικό δίκαιο
Συμβατικό Τραπεζικό δίκαιο
Χρηματοπιστωτικές κρίσεις
Sharia Law
Islamic banking
Islamic derivatives

description: Αντικείμενο της διπλωματικής διατριβής είναι οι νομικές προεκτάσεις και η συγκριτική μελέτη του Ισλαμικού και του Συμβατικού Χρηματοπιστωτικού Συστήματος. Με την παρούσα μελέτη επιχειρείται η διεξοδική διερεύνηση και η συνολική ανάλυση των δυο μοντέλων καθώς επίσης και η καταγραφή όλων των αναφυόμενων προβλημάτων κυρίως του συμβατικού τραπεζικού συστήματος και των εν γένει χρηματοπιστωτικών κρίσεων που αυτό προκαλεί. Εκτίθενται επίσης και αναλύονται τα ακόλουθα θέματα: Οι βασικές αρχές του ισλαμικού τραπεζικού συστήματος, τα επιτρεπτά ισλαμικά χρηματοοικονομικά εργαλεία, η τιτλοποίηση στο Ισλάμ, καθώς επίσης και τα ισλαμικά παράγωγα. Τέλος, επιχειρείται η διεξοδική μελέτη του συστήματος χρηματοπιστωτικής διαμεσολάβησης. Στο πλαίσιο αυτό γίνεται μια συνολική καταγραφή των χρηματοπιστωτικών κρίσεων ως απόρροια του δυτικού τραπεζικού συστήματος, εκθέτοντας και αναλύοντας τα αίτια και τους παράγοντες που οδήγησαν σε αυτές, αλλά και τις συνέπειες τους.
description: The aim of this dissertation is to present the legal aspects and comparative study of the Islamic and the Western-type Banking System. This study attempts to thoroughly investigate and profoundly analyze and record all problems resulting from both aforementioned models of banking. In other words, this study attempts an overall understanding of both Islamic and conventional banking, while displaying and analyzing the financial crises it generates. The following issues are also set out and analyzed: Basic principles of Islamic Banking, Islamic financial engineering, Islamic securitization and Islamic derivatives. Finally this study attempts to analyse both Islamic and conventional financial intermediation. Within this context, it records not only the impact of financial crises, but also the way they are induced by our western-type banking system, their causes and components.
Non-Local Finite-Size Effects in the Dimer Model
Creators: name: Izmailian, Nickolay Sh.
name: Priezzhev, Vyatcheslav B.
name: Ruelle, Philippe
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the finite-size corrections of the dimer model on $\infty \times N$ square lattice with two different boundary conditions: free and periodic. We find that the finite-size corrections depend in a crucial way on the parity of $N$, and show that, because of certain non-local features present in the model, a change of parity of $N$ induces a change of boundary condition. Taking a careful account of this, these unusual finite-size behaviours can be fully explained in the framework of the $c=-2$ logarithmic conformal field theory.
description: This is a contribution to the Proc. of the O'Raifeartaigh Symposium on Non-Perturbative and Symmetry Methods in Field Theory (June 2006, Budapest, Hungary), published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
The effect of cooling on the accretion of circumprimary discs inmerging supermassive black hole binaries
Creators: name: Fontecilla, Camilo
name: Lodato, Giuseppe
name: Cuadra, Jorge
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: At the final stages of a supermassive black hole coalescence, the emission of gravitational waves will efficiently remove energy and angular momentum from the binary orbit, allowing the separation between the compact objects to shrink. In the scenario where a circumprimary disc is present, a squeezing phase will develop, in which the tidal interaction between the disc and the secondary black hole could push the gas inwards, enhancing the accretion rate on to the primary and producing what is known as an electromagnetic precursor. In this context, using 3D hydrodynamic simulations, we study how an adiabatic circumprimary accretion disc responds to the varying gravitational potential as the secondary falls onto the more massive object. We included a cooling prescription controlled by the parameter β= Ωt_{cool}, which will determine how strong the final accretion rate is: a hotter disc is thicker, and the tidal interaction is suppressed for the gas outside the binary plane. Our main results are that for scenarios where the gas cannot cool fast enough (β>30) the disc becomes thick and renders the system invisible, while for β<10 the strong cooling blocks any leakage on to the secondary's orbit, allowing an enhancement in the accretion rate two orders of magnitude stronger than the average through the rest of the simulation.
description: to be published in MNRAS
Το ηλιακό σύστημα στη σκέψη των παιδιών
Creators: name: Χαραλαμπόπουλος, Σπύρος
name: Σπηλιωτοπούλου, Βάσω
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 1998

description: Παιδαγωγική Επιθεώρηση, Vol. 28 (1998)