cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Συγκριτική Προσέγγιση της Περιβαλλοντικής Εκπαίδευσης, μεταξύ των χωρών Αγγλίας και Ελλάδας, όπως παρουσιάζεται στο Εθνικό Αναλυτικό τους Πρόγραμμα της Πρωτοβάθμιας Εκπαίδευσης:
Creators: name: Καρακώστα, Στυλιανή Γρηγορίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Περιβαλλοντική Εκπαίδευση
Εκπαίδευση για την Αειφόρο Ανάπτυξη
Σύγκριση Αναλυτικών Προγραμμάτων
Environmental Education
Education for Sustainable Development
Comparing Curricula

description: Ο σκοπός της εργασίας είναι η συγκριτική διερεύνηση της Περιβαλλοντικής Εκπαίδευσης στην Ελλάδα και την Αγγλία. Βασικό μέσο μελέτης αποτέλεσε το ίδιο το Αναλυτικό Πρόγραμμα της Πρωτοβάθμιας Εκπαίδευσης κάθε χώρας καθώς και άλλα κυβερνητικά έντυπα, εξετάζοντας έτσι το περιεχόμενο και τη θέση που κατέχει η Περιβαλλοντική Εκπαίδευση σε εθνικό επίπεδο. Ταυτόχρονα, συνυπολογίστηκαν και άλλοι παράγοντες, κοινωνικοί, οικονομικοί και εν γένει για το εκπαιδευτικό σύστημα κάθε χώρας, ώστε να προκύψει μια περισσότερο ολοκληρωμένη εικόνα. Τα αποτελέσματα της σύγκρισης έδειξαν ότι αν και οι δύο χώρες διαφέρουν σε καίρια σημεία, ωστόσο, παρουσιάζουν κοινά προβλήματα στην εφαρμογή ποιοτικής Περιβαλλοντικής Εκπαίδευσης. Κυριότερος λόγος για αυτό αναδείχθηκε η ασυμφωνία των καινοτόμων χαρακτηριστικών και στόχων της Περιβαλλοντικής Εκπαίδευσης και της Εκπαίδευσης για την Αειφόρο Ανάπτυξη (π.χ. κριτική σκέψη, έρευνα, βιωματική προσέγγιση) με τα Αναλυτικά Προγράμματα και τα εκπαιδευτικά συστήματα, στα οποία καλούνται να ενταχθούν και τα οποία εξακολουθούν να εφαρμόζουν ένα περισσότερο παραδοσιακό και αναχρονιστικό εκπαιδευτικό παράδειγμα (π.χ. κάλυψη δεδομένης ύλης, πίεση λόγω εθνικών εξετάσεων).
description: Τhe primary goal of the study is to examine and compare Environmental Education between Greece and England. Each country’s National Primary Curriculum was selected as the primary resource in order to investigate the content and the role that environmental programs play at national level. Moreover, other social, economical and educational factors were also studied so as to have a more integrated scope for every country. The results from this comparative approach indicated that even though these two countries differ in vital parts, they do share common problems when it comes to establishing and implementing quality Environmental Education. The research showed that the main reason for these problems is the incompatibility between the progressive goals and characteristics of Environmental Education and Education for Sustainable Development (e.g. critical thinking, research, experiential approach) and the anachronistic and more traditional educational paradigm that the National Curriculum and educational system of both countries adopt (e.g. covering specific syllabus, pressure from national exams and standards).
Causality in the shock wave/turbulent boundary layer interaction
Creators: name: Sasaki, Kenzo
name: Barros, Diogo C.
name: Cavalieri, André V. G.
name: Larchevêque, Lionel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The mechanisms governing the low-frequency unsteadiness in the shock wave/turbulent boundary layer interaction at Mach 2 are considered. The investigation is conducted based on the numerical database issued from large-eddy simulations covering approximately 300 cycles of the low-frequency shock fluctuations. The evaluation of the spectrum in the interaction zone indicates that the broadband low-frequency unsteadiness is predominantly two-dimensional, and can be isolated via spanwise averaging. Empirically derived transfer functions are computed using the averaged flow field, and indicate the occurrence of a feedback mechanism between downstream flow regions and shock fluctuations. The transfer functions are also used as an estimation tool to predict the shock motion accurately; for the largest streamwise separation between input and output signals, correlations above 0.6 are observed between predicted and LES data. Computation of spectral proper orthogonal decomposition (SPOD) modes confirms the existence of upstream traveling waves in the leading spectral mode. Finally, the spectral modes obtained using selected flow regions downstream of the shock enable the reconstruction of a significant portion of the energy in the interaction zone. The current results shed further light on the physical mechanisms driving the shock motion, pointing towards a causal behavior between downstream areas and the characteristic unsteady fluctuations at the approximate shock position.
Rez. Gaius Plinius Secundus: Über Bäume. Lat./Dt., ausgew., hrsg. u. übers. v. B. Herzhoff (RUB 14252), Ditzingen: Reclam 2022, 208 Seiten
Creators: name: Doepner, Thomas
Publisher: name: Latein und Griechisch in Nordrhein-Westfalen
Year: 2023

description: Latein und Griechisch in Nordrhein-Westfalen, Bd. 4 Nr. 2 (2023): Übersetzen
A Review on Near Duplicate Detection of Images using Computer Vision Techniques
Creators: name: Thyagharajan, K. K.
name: Kalaiarasi, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences
subject: I.4.7; I.4.9; I.4.10; I.5.2; I.5.3; I.5.4; I.2.4; I.2.6; I.2.10; H.3.1; H.3.3

description: Nowadays, digital content is widespread and simply redistributable, either lawfully or unlawfully. For example, after images are posted on the internet, other web users can modify them and then repost their versions, thereby generating near-duplicate images. The presence of near-duplicates affects the performance of the search engines critically. Computer vision is concerned with the automatic extraction, analysis and understanding of useful information from digital images. The main application of computer vision is image understanding. There are several tasks in image understanding such as feature extraction, object detection, object recognition, image cleaning, image transformation, etc. There is no proper survey in literature related to near duplicate detection of images. In this paper, we review the state-of-the-art computer vision-based approaches and feature extraction methods for the detection of near duplicate images. We also discuss the main challenges in this field and how other researchers addressed those challenges. This review provides research directions to the fellow researchers who are interested to work in this field.
description: 37 Pages, 7 figures, "For online first version, see https://link.springer.com/article/10.1007/s11831-020-09400-w"
Quantization of bosonic fields with two mass and spin states
Creators: name: Kruglov, S. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate bosonic fields possessing two mass and spin states. The density matrix in the first order formalism is obtained. The quantization of fields in the first order formulation is performed and propagators are found.
description: 9 pages
Adhesive Contact to a Coated Elastic Substrate
Creators: name: Barthel, Etienne
name: Perriot, Antoine
Publisher: name: arXiv
Year: 2007
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We show how the quasi-analytic method developed to solve linear elastic contacts to coated substrates (Perriot A. and Barthel E. {\em J. Mat. Res.}, {\bf 2004}, {\em 19}, 600) may be extended to adhesive contacts. Substrate inhomogeneity lifts accidental degeneracies and highlights the general structure of the adhesive contact theory. We explicit the variation of the contact variables due to substrate inhomogeneity. The relation to other approaches based on Finite Element analysis is discussed.
Altsprachlicher Unterricht in NRW und das Netzwerk Historische Schulbibliotheken
Creators: name: Magofsky, Benjamin
name: Nießen, Johannes Maximilian
name: Noeske, Felicitas
Publisher: name: Latein und Griechisch in Nordrhein-Westfalen
Year: 2023

description: Latein und Griechisch in Nordrhein-Westfalen, Bd. 4 Nr. 2 (2023): Übersetzen
Systematics of heavy quarkonia from Regge trajectories on $(n,M^2)$ and $(M^2,J)$ planes
Creators: name: Gershtein, S. S.
name: Likhoded, A. K.
name: Luchinsky, A. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we show that heavy quarckonium states, similar to light mesons, form Regge trajectories in $(n,M^2)$ and $(M^2,J)$ planes and the slope of these trajectories is independent on the quantum numbers of the mesons. This fact can be useful for the prediction of the masses of heavy quarkonia and the determination of the quantum numbers of the newly discovered states.
description: 10 pages, 2 figures, 2 tables; some refrences are added, comparison with QCD sum rules result is presented
Διερεύνηση των γνώσεων και αναπαραστάσεων των μαθητών της Ε΄ και Στ΄ τάξης δημοτικού σχολείου για το δασικό οικοσύστημα:
Creators: name: Ευαγγελίδης, Γεώργιος Ευαγγέλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Περιβάλλον-δασικό οικοσύστημα
Γνώσεις
Αναπαραστάσεις
Environment-forest ecosystem
Knowledge
Representations

description: Σκοπός της εργασίας ήταν να διαπιστωθεί σε πιο βαθμό η εφαρμογή προγραμμάτων ΠΕ σχετικά με το δάσος, σε μαθητές του δημοτικού σχολείου, συμβάλλει θετικά στην αύξηση των περιβαλλοντικών τους γνώσεων για το δασικό οικοσύστημα, στην κατανόηση των σχέσεων που αναπτύσσονται μέσα σε αυτό, κατά πόσο συμβάλλει θετικά στην αλλαγή των αντιλήψεων και στερεοτύπων για το ρόλο και τη χρησιμότητα διαφόρων ειδών του δασικού οικοσυστήματος και τέλος κατά πόσο συμβάλλει στην αναγνώριση των κοινωνικών παραμέτρων και στη σύνδεση τους με τις απειλές και την προστασία των δασών. Διαπιστώθηκε πως η εκπόνηση των προγραμμάτων ΠΕ για το δασικό οικοσύστημα δεν επέφερε σημαντική αύξηση στο επίπεδο των περιβαλλοντικών γνώσεων των μαθητών που συμμετείχαν σε αυτά. Δεν φαίνεται επίσης να βοήθησε τους μαθητές να αντιληφθούν πιο πολύπλοκες σχέσεις και αλληλεπιδράσεις στο δασικό οικοσύστημα. Τα αποτελέσματα έδειξαν πως οι περιβαλλοντικές γνώσεις των μαθητών για το δάσος κυμαίνονται σε μέτριο έως καλό επίπεδο, ανεξάρτητα από τη συμμετοχή ή μη σε πρόγραμμα ΠΕ, είναι αποσπασματικές, ενώ απουσιάζει η ολιστική αντίληψη των σχέσεων και αλληλεπιδράσεων που αναπτύσσονται στο δασικό οικοσύστημα. Η συμμετοχή των μαθητών σε προγράμματα ΠΕ δεν ενίσχυσε και τη σύνδεση του φυσικού οικοσυστήματος με παραμέτρους οικονομικές και κοινωνικές, πέρα από τις οικολογικές.
description: The purpose of this study was to assess to what extent the implementation of IP programs on the forest, primary pupils, contributes positively to increase their environmental knowledge on the forest ecosystem, understanding the relationships within it, whether it contributes positive change of attitudes and stereotypes about the role and usefulness of various types of forest ecosystem and finally whether it contributes to the recognition of social issues and their connection with the threats and the protection of forests. It was found that the development of IP programs for the forest ecosystem is not brought about a significant increase in the level of environmental knowledge of students enrolled in them. There also seems to help students understand more complex relationships and interactions within the forest ecosystem. The results showed that the environmental knowledge of students about the forest range from moderate to good level, regardless of participation or non-IP in a program is fragmented and lacks the holistic understanding of relationships and interactions that grow on the forest ecosystem. The participation of students in programs not supported IP and connecting the natural ecosystem and social economic factors beyond the green.
Modelling the Galactic very-high-energy $γ$-ray source population
Creators: name: Steppa, Constantin
name: Egberts, Kathrin
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The High Energy Stereoscopic System (H.E.S.S.) Galactic plane survey (HGPS) is to date the most comprehensive census of Galactic $γ$-ray sources at very high energies (VHE; $100\,\mathrm{GeV}\leq E\leq 100\,\mathrm{TeV}$). As a consequence of the limited sensitivity of this survey, the 78 detected $γ$-ray sources comprise only a small and biased subsample of the overall population. Still, numerical modelling allows us to study the VHE $γ$-ray source population in the Milky Way based on this sample. In this work, several azimuth-symmetric and spiral-arm models are compared for spatial source distribution. The luminosity and radius function of the population are derived from the source properties of the HGPS data set and are corrected for the sensitivity bias of the HGPS. Based on these models, VHE source populations are simulated and the subsets of sources detectable according to the HGPS are compared with HGPS sources. The power-law indices of luminosity and radius functions are determined to range between $-1.6$ and $-1.9$ for luminosity and $-1.1$ and $-1.6$ for radius. Azimuth-symmetric distributions and a distribution following a four-arm spiral structure without Galactic bar describe the HGPS data reasonably well. The total number of Galactic VHE sources is predicted to be in the range from 800 to 7000 with a total luminosity and flux of $(1.6-6.3) \cdot 10^{36}$~ph~s$^{-1}$ and $(3-15) \cdot 10^{-10}$~ph~cm$^{-2}$~s$^{-1}$, respectively. Depending on the model, the HGPS sample accounts for $(68-87)\%$ of the emission of the population in the scanned region. This suggests that unresolved sources represent a critical component of the diffuse emission measurable in the HGPS. With the foreseen jump in sensitivity of the Cherenkov Telescope Array, the number of detectable sources is predicted to increase by a factor between 5 - 9.
description: 11 pages, 11 figures, accepted for publication in Astronomy & Astrophysics
Bericht über die Landestagung des DAV-NRW vom 31.8. bis 1.9.2023
Creators: name: Plum, Philipp Ferdinand
Publisher: name: Latein und Griechisch in Nordrhein-Westfalen
Year: 2023

description: Latein und Griechisch in Nordrhein-Westfalen, Bd. 4 Nr. 2 (2023): Übersetzen
Pensare dal riconoscimento
Creators: name: Bergamo, Antonio
Publisher: name: Apulia Theologica
Year: 2025

description: Recensione sul testo di Raul Bufo edito da Inschibboleth, Roma 2023
description: Apulia Theologica, V. 10 N. 1 (2024): Apulia theologica vol. 10, fascicolo 1
Erste Griechischakademie NRW für Schülerinnen und Schüler in Bochum
Creators: name: Schulz, Christiane
Publisher: name: Latein und Griechisch in Nordrhein-Westfalen
Year: 2023

description: Latein und Griechisch in Nordrhein-Westfalen, Bd. 4 Nr. 2 (2023): Übersetzen
Ο ρόλος των αρχιτεκτονικών θεμάτων στην ελληνική σουρεαλιστική ζωγραφική:
Creators: name: Σφέτκου, Σοφία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: subject: Αρχιτεκτονική
subject: Σουρεαλισμός
subject: Ελληνική ζωγραφική
subject: Architecture
subject: FOS: Civil engineering
subject: Surrealism
subject: Greek painting

description: Στόχος της παρούσας μεταπτυχιακής εργασίας είναι να ερευνήσει τη σημασία που αποκτούν οι αρχιτεκτονικές μορφές στη ελληνική σουρεαλιστική σκέψη, εξετάζοντας τον τρόπο και τη σκοπιμότητα της ενσωμάτωσής τους στην εικαστική έκφραση του κινήματος. Στην εισαγωγή γίνεται μια σύντομη αναφορά στις αφετηρίες και τη σχέση του διεθνούς σουρεαλισμού με την αρχιτεκτονική, αλλά και στις συνθήκες ανάπτυξης και την ιδιαίτερη μορφή με την οποία εμφανίζεται το κίνημα στον ελλαδικό χώρο. Στη συνέχεια, με άξονα την απουσία ή την παρουσία της ανθρώπινης μορφής τα παραδείγματα που μελετήθηκαν διαχωρίζονται σε δύο ομάδες, οργανώνοντας αντίστοιχα το κείμενο σε δύο κεφάλαια, με επιμέρους υποκεφάλαια που διαμορφώνονται με βάση το θέμα της σύνθεσης: εσωτερικά περιβάλλοντα, τοπιογραφία, πορτρέτα, πολυπρόσωπες αφηγηματικές συνθέσεις. Ακολουθούν τα συμπεράσματα που συνοψίζουν τα βασικά σημεία της εργασίας.
description: The aim of this thesis is to study the significance that architectural motifs acquire within Greek surrealist thought, by examining the mode and the purpose of their incorporation into the movement’s pictorial expression. The introduction refers briefly to the roots and the relationship of international Surrealism to architecture, as well as to the special conditions that affect the movement’s development and the particular form that it takes in Greece. Afterwards, based on the absence or presence of the human form the paintings that were chosen for this study are divided into two groups, thereby dividing also the main text in two chapters, which in turn are divided in subsections according to the subject of the painting: interiors, landscapes, portraits, multi-figure narrative compositions. The final part is the conclusions, which summarize the basic points of the study.
High-Precision Spectroscopy of Pulsating Stars
Creators: name: Aerts, C.
name: Hekker, S.
name: Desmet, M.
name: Carrier, F.
name: Zima, W.
name: Briquet, M.
name: De Ridder, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We review methodologies currently available to interprete time series of high-resolution high-S/N spectroscopic data of pulsating stars in terms of the kind of (non-radial) modes that are excited. We illustrate the drastic improvement of the detection treshold of line-profile variability thanks to the advancement of the instrumentation over the past two decades. This has led to the opportunity to interprete line-profile variations with amplitudes of order m/s, which is a factor 1000 lower than the earliest line-profile time series studies allowed for.
description: To appear in Precision Spectroscopy in Astrophysics, Eds . Pasquini, M. Romaniello, N.C. Santos, and A. Correia, Springer-Verlag series "ESO Astrophysics Symposia". 4 pages, 1 figure
Am Anfang war das Wort: Übersetzen in Theorie und Praxis bei Cicero und Hieronymus
Creators: name: Lukas, Randolf
Publisher: name: Latein und Griechisch in Nordrhein-Westfalen
Year: 2023

description: Latein und Griechisch in Nordrhein-Westfalen, Bd. 4 Nr. 2 (2023): Übersetzen
The dune size distribution and scaling relations of barchan dune fields
Creators: name: Durán, Orencio
name: Schwämmle, Veit
name: Lind, Pedro G.
name: Herrmann, Hans J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Barchan dunes emerge as a collective phenomena involving the generation of thousands of them in so called barchan dune fields. By measuring the size and position of dunes in Moroccan barchan dune fields, we find that these dunes tend to distribute uniformly in space and follow an unique size distribution function. We introduce an analyticalmean-field approach to show that this empirical size distribution emerges from the interplay of dune collisions and sand flux balance, the two simplest mechanisms for size selection. The analytical model also predicts a scaling relation between the fundamental macroscopic properties characterizing a dune field, namely the inter-dune spacing and the first and second moments of the dune size distribution.
description: 6 pages, 4 figures. Submitted for publication
Characterisation of a turbulent module for the MITHIC high-contrast imaging testbed
Creators: name: Vigan, A.
name: Postnikova, M.
name: Caillat, A.
name: Sauvage, J. -F.
name: Dohlen, K.
name: Hadi, K. El
name: Fusco, T.
name: Lamb, M.
name: N'Diaye, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Future high-contrast imagers on ground-based extremely large telescopes will have to deal with the segmentation of the primary mirrors. Residual phase errors coming from the phase steps at the edges of the segments will have to be minimized in order to reach the highest possible wavefront correction and thus the best contrast performance. To study these effects, we have developed the MITHIC high-contrast testbed, which is designed to test various strategies for wavefront sensing, including the Zernike sensor for Extremely accurate measurements of Low-level Differential Aberrations (ZELDA) and COronagraphic Focal-plane wave-Front Estimation for Exoplanet detection (COFFEE). We recently equipped the bench with a new atmospheric turbulence simulation module that offers both static phase patterns representing segmented primary mirrors and continuous phase strips representing atmospheric turbulence filtered by an AO or an XAO system. We present a characterisation of the module using different instruments and wavefront sensors, and the first coronagraphic measurements obtained on MITHIC.
description: Presented at SPIE Astronomical Instrumentation + Telescope 2016
Statistical mechanics of coil-hairpin transition in a single stranded DNA oligomer
Creators: name: Kumar, Sanjay
name: Giri, Debaprasad
name: Singh, Yashwant
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: A model of self-avoiding walk with suitable constraints on self-attraction is developed to describe the conformational behavior of a short RNA or a single stranded DNA molecule that forms hairpin structure and calculate the properties associated with coil-hairpin transition by enumerating all possible conformations of a chain of N monomers in two and three dimensions. The first and last five monomers of the chain have been allowed to pair and form the stem of the hairpin structure while the remaining monomers can form a loop. The coil-hairpin transition is found to be first order with large entropy change. While the rate of unzipping of the hairpin stem is found to be independent of the length of the loop and the dimensionality of the space, the rate of closing varies greatly with loop length and dimensionality of the space.
description: RevTeX v4, 10 pages with 5 eps figures
Neutron beta-decay, Standard Model and cosmology
Creators: name: Serebrov, A. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The precise value of the neutron lifetime is of fundamental importance to particle physics and cosmology. The neutron lifetime recently obtained, 878.5 +/- 0.7stat +/- 0.3sys s, is the most accurate one to date. The new result for the neutron lifetime differs from the world average value by 6.5 standard deviations. The impact of the new result on testing of Standard Model and on data analysis for the primordial nucleosynthesis model is scrutinized.
description: 14 pages, 3 figures
Semantic Access Control for Privacy Management of Personal Sensing in Smart Cities
Creators: name: Drozdowicz, Michał
name: Ganzha, Maria
name: Paprzycki, Marcin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Personal and home sensors generate valuable information that could be used in Smart Cities. Unfortunately, typically, this data is locked out and used only by application/system developer. While vendors are to blame, one should consider also the "binary nature" of data access. Specifically, either owner has full control over her data (e.g. in a "closed system"), or she completely looses control, when the data is "opened". In this context, we propose, a semantic technologies-based, authorization and privacy control framework that enables user to maintain flexible, yet manageable data access control policies. The proposed approach is described in detail, including implementation and testing.
description: in IEEE Transactions on Emerging Topics in Computing (Early Access), 2020
Plinius‘ Otium-Vorstellung: Ein Vorbild für uns? (Plin. epist. 10,36)
Creators: name: Krause, Larah
Publisher: name: Latein und Griechisch in Nordrhein-Westfalen
Year: 2023

description: Latein und Griechisch in Nordrhein-Westfalen, Bd. 4 Nr. 2 (2023): Übersetzen
Ανάλυση μεθόδων αξιολόγησης και αξιοποίησης προϊόντων μετά τη λήξη διάρκειας ζωής τους (Reverse Logistics) και ανάπτυξη προσομοιωτικού προτύπου
Creators: name: Γκούτζου, Ηλιάνα Μιχαήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Αντίστροφη Εφοδιατική Αλυσίδα
Ανακατασκευή
Προσομοιωτικό πρότυπο με Arena
Reverse Logistics
Remanufacturing
Simulation model with Arena

description: Στην παρούσα εργασία εξετάζεται το ζήτημα του ελέγχου της ποιότητας και του διαχωρισμού των επιστρεφόμενων προϊόντων ανάλογα με το προϊόν και την κατάσταση του. Παρουσιάζονται σύντομα οι υφιστάμενες δραστηριότητες και εταιρικές πρακτικές στις αντίστροφες εφοδιαστικές αλυσίδες, οι μέθοδοι αξιολόγησης της ποιότητας των προϊόντων, και οι τρόποι ανάκτησης αξίας με αναφορά παραδειγμάτων διαφόρων επιχειρήσεων. Επιπλέον γίνεται μια ανασκόπηση σχετικά με τα μοντέλα που έχουν μελετηθεί στον προγραμματισμό παραγωγής και στη διαχείριση αποθεμάτων, και στη συνέχεια αναπτύσσεται ένα προσομοιωτικό πρότυπο που εξετάζει την επίπτωση της κατάστασης των επιστροφών και της ακρίβειας ελέγχου στην κατηγοριοποίηση των προϊόντων σύμφωνα με την ποιότητα, στο μέσο συνολικό κόστος της επιχείρησης. Παράλληλα εξετάζονται και δύο διαφορετικές πολιτικές αξιοποίησης των χρησιμοποιημένων εξαρτημάτων. Τέλος, συνοψίζονται αποτελέσματα της εργασίας και κάποιες προτάσεις για περαιτέρω έρευνα.
description: The thesis considers the issues of quality control and categorization of returned products according to their condition. The current activities and business practices in reverse supply chains regarding the collection, quality evaluation, and value recovery with reference to case studies for a diversity of businesses sectors are briefly presented. Moreover, a review of the existing reverse supply chain management literature on production planning and inventory management decisions is included. Subsequently, a simulation model is developed, considering a hybrid manufacturing / remanufacturing system. Assuming a relatively general problem setting (stochastic demand, returns and lead times), we examine the impact of the quality of returned products and the accuracy of classification of the returned products according to their quality on the average total cost of the enterprise. The aforementioned issues are examined under two alternative remanufacturing policies, which in general can be characterized as a pull and a push remanufacturing policies. Each policy is evaluated for different values of returns quality and classification accuracy as well as for alternative combinations of the cost parameters, in order to broaden the applicability of our findings. The results of the simulation model are reported along with some interesting insights obtained from the analysis. Finally, some recommendations for further research are made.
A non-Hermitian critical point and the correlation length of strongly correlated quantum systems
Creators: name: Nakamura, Yuichi
name: Hatano, Naomichi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a non-Hermitian generalization of quantum systems in which an imaginary vector potential is added to the momentum operator. In the tight-binding approximation, we make the hopping energy asymmetric in the Hermitian Hamiltonian. In a previous article, we conjectured that the non-Hermitian critical point where the energy gap vanishes is equal to the inverse correlation length of the Hermitian system and we confirmed the conjecture for two exactly solvable systems. In this article, we present more evidence for the conjecture. We also argue the basis of our conjecture by noting the dispersion relation of the elementary excitation.
description: 25 pages, 18 figures
Partial regularity for variational integrals with Morrey-Hölder zero-order terms, and the limit exponent in Massari's regularity theorem
Creators: name: Schmidt, Thomas
name: Schütt, Jule Helena
Publisher: name: arXiv
Year: 2024
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 49N60, 35B65 (primary), 49Q05, 53A10, 35J47, 35J93 (secondary)

description: We revisit the partial $\mathrm{C}^{1,α}$ regularity theory for minimizers of non-parametric integrals with emphasis on sharp dependence of the Hölder exponent $α$ on structural assumptions for general zero-order terms. A particular case of our conclusions carries over to the parametric setting of Massari's regularity theorem for prescribed-mean-curvature hypersurfaces and there confirms optimal regularity up to the limit exponent.
Maximizing the Probability of Delivery of Multipoint Relay Broadcast Protocol in Wireless Ad Hoc Networks with a Realistic Physical Layer
Creators: name: Ingelrest, François
name: Simplot-Ryl, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: It is now commonly accepted that the unit disk graph used to model the physical layer in wireless networks does not reflect real radio transmissions, and that the lognormal shadowing model better suits to experimental simulations. Previous work on realistic scenarios focused on unicast, while broadcast requirements are fundamentally different and cannot be derived from unicast case. Therefore, broadcast protocols must be adapted in order to still be efficient under realistic assumptions. In this paper, we study the well-known multipoint relay protocol (MPR). In the latter, each node has to choose a set of neighbors to act as relays in order to cover the whole 2-hop neighborhood. We give experimental results showing that the original method provided to select the set of relays does not give good results with the realistic model. We also provide three new heuristics in replacement and their performances which demonstrate that they better suit to the considered model. The first one maximizes the probability of correct reception between the node and the considered relays multiplied by their coverage in the 2-hop neighborhood. The second one replaces the coverage by the average of the probabilities of correct reception between the considered neighbor and the 2-hop neighbors it covers. Finally, the third heuristic keeps the same concept as the second one, but tries to maximize the coverage level of the 2-hop neighborhood: 2-hop neighbors are still being considered as uncovered while their coverage level is not higher than a given coverage threshold, many neighbors may thus be selected to cover the same 2-hop neighbors.
Übersetzen aus dem Griechischen: Kurzbericht aus der Praxis
Creators: name: Aretz, Susanne
Publisher: name: Latein und Griechisch in Nordrhein-Westfalen
Year: 2023

description: Latein und Griechisch in Nordrhein-Westfalen, Bd. 4 Nr. 2 (2023): Übersetzen
Local Clustering and Global Spreading of Receptors for Optimal Spatial Gradient Sensing
Creators: name: Alonso, Albert
name: Endres, Robert G.
name: Kirkegaard, Julius B.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Information Theory (cs.IT)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Spatial information from cell-surface receptors is crucial for processes that require signal processing and sensing of the environment. Here, we investigate the optimal placement of such receptors through a theoretical model that minimizes uncertainty in gradient estimation. Without requiring a priori knowledge of the physical limits of sensing or biochemical processes, we reproduce the emergence of clusters that closely resemble those observed in real cells. On perfect spherical surfaces, optimally placed receptors spread uniformly. When perturbations break their symmetry, receptors cluster in regions of high curvature, massively reducing estimation uncertainty. This agrees with mechanistic models that minimize elastic preference discrepancies between receptors and cell membranes. We further extend our model to motile receptors responding to cell-shape changes and external fluid flow, demonstrating the relevance of our model in realistic scenarios. Our findings provide a simple and utilitarian explanation for receptor clustering at high-curvature regions when high sensing accuracy is paramount.
description: This version has been accepted for publication in Physical Review Letters. The final version is available at https://doi.org/10.1103/PhysRevLett.134.158401. Title has changed
Benedire il peccato?
Creators: name: Gallo, Marco
name: Massaro, Roberto
Publisher: name: Apulia Theologica
Year: 2025

description: La pubblicazione della dichiarazione Fiducia supplicans ha suscitato un notevole clamore che ha avviato un dibattito importante sia sulle questioni liturgiche che su quelle etiche. Il presente contributo cerca di mettere insieme queste istanze, riflettendo, da un lato, sul nuovo sviluppo nella vita della chiesa per ampliare e arricchire la comprensione classica delle benedizioni, dall’altro, sulle implicazioni e le urgenze che la questione omosessuale richiama alla riflessione etico-teologica. Ne emerge un tentativo interdisciplinare che, si spera, possa avviare ulteriori discussioni e approfondimenti per una chiesa sempre più capace di accoglienza e inclusività.
description: Apulia Theologica, V. 10 N. 1 (2024): Apulia theologica vol. 10, fascicolo 1
Thermalization in Heavy-Ion Collisions
Creators: name: Anchishkin, Dmitry
name: Yezhov, Stanislav
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We propose a model for isotropization and corresponding thermalization in a nucleon system created in the collision of two nuclei. The model is based on the assumption: during the fireball evolution, two-particle elastic and inelastic collisions give rise to the randomization of the nucleon-momentum transfer which is driven by a proper distribution. As a first approximation, we assume a homogeneous distribution where the values of the momentum transfer is bounded from above. These features have been shown to result in a smearing of the particle momenta about their initial values and, as a consequence, in their partial isotropization and thermalization. The nonequilibrium single-particle distribution function and single-particle spectrum which carry a memory about initial state of nuclei have been obtained.
description: 12 pages, 4 figures; added references, corrected typos, added explanatory figures, extended discussion
title: The Impact of Subjective Norms Upon Faculty Reporting of College Student Plagiarism: A Theory of Planned Behaviour Approach
Creators: name: Harwood, Linda
Publisher: name: University of Liverpool Repository
Year: 2024

description: A faculty member’s decision whether to report college student plagiarism is shaped by many considerations that can be categorized into the three main psychosocial categories of the theory of planned behaviour: personal attitudes and beliefs, subjective norms, and perceived behavioural control about performing the target behaviour. This research study sought to explore the impact of subjective norms on reporting student plagiarism in different School contexts within the same institution by first describing the reporting context of each School in terms of its members’ values (a background factor), attitudes, subjective norms, perceived behavioural control, and reporting praxis, and then by focusing on peripatetic faculty members’ perceptions of each School’s subjective norms and reporting behaviour within each. Because these faculty members’ values, attitudes, and perceived behavioural control would remain the same, their reporting behaviour in different School contexts could suggest the impact of subjective norms in each. Consequently, an advanced embedded convergent mixed-methods approach was used. This study’s purpose was to contribute to the understanding of the complexity of student plagiarism management and its related policy operationalisation.
Faculty members from three Schools within the same rural college in western Canada were surveyed, in part one for their ranking of life-guiding values using the Short Schwartz Values Survey (SSVS), and in part two for their specific attitudes, subjective norms, perceived behavioural control, and reporting intention and actual reporting behaviour. To answer the first two research questions about each School’s reporting context, I combined the survey results with the data collected from the semi-structured interviews of School Chairs to describe each School’s reporting context. To answer the third research question about the impact of subjective norms on reporting behaviour, seven peripatetic faculty were interviewed about their experiences with policy operationalization within their home and non-home Schools, and the data was thematically analyzed through a modified TPB lens. It was found that these subjective norms did impact peripatetic faculty in their reporting intention and behaviour across Schools and that the majority did adjust their response to what constituted reportable student plagiarism within each School context. This finding indicates that a School Chair’s team-building leadership can play a vital role in shaping subjective norms about an issue, thereby influencing a target behaviour. This thesis also acknowledges artificial intelligence platforms, such as ChatGPT, as potentially the next major issue in student plagiarism management and concludes that faculty must teach and encourage authentic writing skills to mitigate its misuse and thereby to continue to promote academic integrity.
Non-Abelian Gauged Chiral Boson with a Generalized Faddevian Regularization
Creators: name: Rahaman, Anisur
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider non-Abelian gauged version of chiral boson with a generalized Faddeevian regularization. It is a second class constrained theory. We quantize the theory and analyze the phase space. It is shown that in spite of the lack of manifest Lorentz invariance in the action, it has a consistent and Poincare' invariant phase space structure.
description: 10 pages latex file
Crystallographic groups, strictly tessellating polytopes, and analytic eigenfunctions
Creators: name: Rowlett, Julie
name: Blom, Max
name: Nordell, Henrik
name: Thim, Oliver
name: Vahnberg, Jack
Publisher: name: arXiv
Year: 2020
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 51F15, 20H15, 26E05, 35C09, 47A75

description: The mathematics of crystalline structures connects analysis, geometry, algebra, and number theory. The planar crystallographic groups were classified in the late 19th century. One hundred years later, Bérard proved that the fundamental domains of all such groups satisfy a very special analytic property: the Dirichlet eigenfunctions for the Laplace eigenvalue equation are all trigonometric functions. In 2008, McCartin proved that in two dimensions, this special analytic property has both an equivalent algebraic formulation, as well as an equivalent geometric formulation. Here we generalize the results of Bérard and McCartin to all dimensions. We prove that the following are equivalent: the first Dirichlet eigenfunction for the Laplace eigenvalue equation on a polytope is real analytic, the polytope strictly tessellates space, and the polytope is the fundamental domain of a crystallographic Coxeter group. Moreover, we prove that under any of these equivalent conditions, all of the eigenfunctions are trigonometric functions. In conclusion, we connect these topics to the Fuglede and Goldbach conjectures and give a purely geometric formulation of Goldbach's conjecture.
description: This is the Author's Original Manuscript. A significantly revised version has been accepted for publication in the American Math Monthly
Inverse melting in lattice-gas models
Creators: name: Prestipino, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Inverse melting is the phenomenon, observed in both Helium isotopes, by which a crystal melts when cooled at constant pressure. I investigate discrete-space analogs of inverse melting by means of two instances of a triangular-lattice-gas system endowed with a soft-core repulsion and a short-ranged attraction. To reconstruct the phase diagram, I use both transfer-matrix and Monte Carlo methods, as well as low-temperature series expansions. In one case, a phase behavior reminiscent of Helium emerges, with a loose-packed phase (which is solid-like for low temperatures and liquid-like for high temperatures) extending down to zero temperature for low pressures and the possibility of melting the close-packed solid by isobaric cooling. At variance with previous model studies of inverse melting, the driving mechanism of the present phenomenon is mainly geometrical, related to the larger free-energy cost of a ``vacancy'' in the loose-packed solid than in the close-packed one.
description: 10 pages, 12 figures
Ein innovatives Übersetzungsgespräch: Kooperativ, differenzierend schülergeleitet, digital
Creators: name: Rüth, Melina
name: Tschakert, Sebastian
Publisher: name: Latein und Griechisch in Nordrhein-Westfalen
Year: 2023

description: Latein und Griechisch in Nordrhein-Westfalen, Bd. 4 Nr. 2 (2023): Übersetzen
Lower bounds on concurrence and separability conditions
Creators: name: de Vicente, Julio I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We obtain analytical lower bounds on the concurrence of bipartite quantum systems in arbitrary dimensions related to the violation of separability conditions based on local uncertainty relations and on the Bloch representation of density matrices. We also illustrate how these results complement and improve those recently derived [K. Chen, S. Albeverio, and S.-M. Fei, Phys. Rev. Lett. 95, 040504 (2005)] by considering the Peres-Horodecki and the computable cross norm or realignment criteria.
description: 5 pages, 1 figure; minor changes, references added; final version: minor correction in proof of lemma 1, scope of theorem 2 clarified, to appear in PRA; mistake in proof of lemma 1 of published version corrected, results unchanged
Σύνθεση και μελέτη της δομής τριοργανοκασσιτερικών ενώσεων 2,3-διυποκατεστημένου κινοξαλινο-6-καρβοξυλικού οξέος:
Creators: name: Γιαννουχίδου, Αικατερίνη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: οργανοκασσιτερικές ενώσεις
κινοξαλίνες
σύμπλοκα κινοξαλινών
organotin compounds
quinoxalines
quinoxaline complexes

description: Παρασκευάστηκαν και μελετήθηκαν 2,3-διυποκατεστημένα παράγωγα της 6-καρβοξυ κινοξαλίνης με μεθυλο, φαινυλο και πυριδυλο υποκαταστάτες αντίστοιχα. Η καρβοξυλική ομάδα των μορίων αυτών σχηματίζει τριοργανο-κασσιτερικούς εστέρες, από τους οποίους συντέθηκαν και μελετήθηκαν οι μεθυλο, βουτυλο και φαινυλο. Ο συγκερασμός των φασματοσκοπικών δεδομένων υπερύθρου και Mössbauer για τις οργανοκασσιτερικές ενώσεις φανερώνει ότι σε αρκετές (σε όλες τις μεθυλο και σε κάποια φαινυλο) συναρμόζεται Η2Ο δίνοντας στη στερεή φάση περιβάλλον με αριθμό συναρμογής 5 για τον κασσίτερο. Το περιβάλλον αυτό δε διατηρείται σε διάλυμα, όπως έδειξαν οι μετρήσεις 1H και 13C NMR. Οι βουτυλο ενώσεις είναι υγρές και το περιβάλλον του κασσιτέρου στα διαλύματά τους είναι μεταξύ τετραεδρικού και κάποιου με μεγαλύτερο αριθμό συναρμογής, πιθανόν μέσω αλληλεπιδράσεων με τα ετεροκυκλικά άτομα Ν γειτονικών μορίων. Η συναρμογή του νερού για τα μεθυλο παράγωγα καθώς και για το τριφαινυλο της 2,3-διμεθυλο υποκατεστημένης κινοξαλίνης επιβεβαιώθηκε με την επίλυση των κρυσταλλικών δομών τους. Τα φάσματα ορατού των ενώσεων εμφανίζουν ταινίες μεταφοράς φορτίου στην περιοχή των χαμηλών ενεργειών, η ύπαρξη των οποίων επιβεβαιώνεται με ημιεμπειρικούς κβαντοχημικούς υπολογισμούς όπου έχει καταγραφεί η ύπαρξη μετωπικών τροχιακών που είναι εντοπισμένα σε περιορισμένες περιοχές των μορίων, μεταξύ αυτών και στην περιοχή του κασσιτέρου.
description: 2,3-bis methyl, phenyl and pyridyl substituted derivatives of 6-carboxy-quinoxaline are synthesized and studied. The carboxylic group of the ligands forms triorganotin esters of which the methyl, butyl and phenyl have been studied. The coalescence of spectroscopic data from infrared and Mössbauer spectra for the organotin compounds reveals that in several cases (all the methyl and some phenyl esters) H2O is coordinated giving, in the solid state, tin environments with coordination number 5. This has been observed not to be retained in solution as 1H and 13C NMR measurements indicate. The butyl esters are oils and in solution the tin environment is predicted to be intermediate between tetrahedral and one with higher coordination number probably through some interaction with heterocyclic nitrogen atoms from neighboring units. The coordination of water has been verified by X-ray structural studies for the methyl esters and the phenyl ester of the 2,3-dimethyl quinoxaline. The visible spectra of the compounds present low energy bands which can be assigned to charge transfer excitations. The assignment is supported by semiempirical computations in which the resulting frontier orbitals appear to be localized in various sites of the ligands and in some cases located on the organotin fragment.
A Wearables-Driven Attack on Examination Proctoring
Creators: name: Heya, Tasnia Ashrafi
name: Serwadda, Abdul
name: Griswold-Steiner, Isaac
name: Matovu, Richard
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Multiple choice questions are at the heart of many standardized tests and examinations at academic institutions allover the world. In this paper, we argue that recent advancements in sensing and human-computer interaction expose these types of questions to highly effective attacks that today's proctor's are simply not equipped to detect. We design one such attack based on a protocol of carefully orchestrated wrist movements combined with haptic and visual feedback mechanisms designed for stealthiness. The attack is done through collaboration between a knowledgeable student (i.e., a mercenary) and a weak student (i.e., the beneficiary) who depends on the mercenary for solutions. Through a combination of experiments and theoretical modeling, we show the attack to be highly effective. The paper makes the case for an outright ban on all tech gadgets inside examination rooms, irrespective of whether their usage appears benign to the plain eye.
description: Published in 2021 18th International Conference on Privacy, Security and Trust (PST)