cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Από το χαρτί στην οθόνη: ζητήματα της ηλεκτρονικής λογοτεχνίας
Creators: name: Μπεχλιβάνου, Μαρία Αντωνίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Ηλεκτρονική λογοτεχνία
Κυβερνολογοτεχνία
Υπερκείμενο
Electronic literature
Cyber-literature
Hypertext

description: Η εργασία αυτή εξετάζει ορισμένα ζητήματα της ηλεκτρονικής λογοτεχνίας. Αρχικά, προσδιορίζεται η βάση της κυβερνολογοτεχνίας, το υπερκείμενο, και στη συνέχεια το περιβάλλον στο οποίο κυρίως αναπτύσσεται αυτή, το διαδίκτυο. Ιδιαίτερη έμφαση δίνεται στην προώθηση του οπτικού πολιτισμού μέσω του διαδικτύου, ενώ γίνεται προσπάθεια ένταξης του φαινομένου αυτού στη γενικότερη ψηφιακή επανάσταση που συντελείται τις τελευταίες δεκαετίες στο χώρο της τέχνης και ειδικότερα της λογοτεχνίας, προκειμένου να γίνουν κατανοητές οι συνθήκες γένεσης και ανάπτυξης του νέου αυτού λογοτεχνικού είδους. Στη συνέχεια εξετάζεται ο προβληματισμός διάφορων μελετητών της ηλεκτρονικής λογοτεχνίας (Hayles, Cicconi, Bolter, Viires κ.ά.) σχετικά με το θέμα του ορισμού και της τυπολογίας της. Επιπλέον τίθεται το θέμα της υβριδικότητας, μιας έννοιας που έχει οδηγήσει σε διάφορες απόψεις αναφορικά με τα χαρακτηριστικά, τη λογοτεχνικότητα και το μέλλον της ηλεκτρονικής λογοτεχνίας, καθώς και της σχέσης της με άλλα ψηφιακά μέσα, όπως τα ηλεκτρονικά παιχνίδια. Μέσα από τον παραπάνω προβληματισμό καταφαίνεται η ανάγκη για τη δημιουργία μιας σύνθετης θεωρητικής μεταγλώσσας, που θα λαμβάνει υπόψη τη διττή φύση των λογοτεχνικών κυβερνοκειμένων, ως λογοτεχνικών κατασκευών και συνάμα τεχνολογικών προϊόντων. Τέλος, επιχειρείται μια χαρτογράφηση της ελληνικής πραγματικότητας αναφορικά με την κυβερνολογοτεχνία.
description: This essay examines certain issues with regard to electronic literature. Initially, the theoretical premises of cyber-literature, the hypertext, and the environment in which it develops-the Internet- are specified. Special emphasis is given to the promotion of visual culture through the Internet, while there is an attempt to integrate this phenomenon into the recent digital revolution in art and, more specifically, in literature, in order to shed light on the conditions under which this new literary genre emerged and developed. Furthermore, the contributions of various electronic literature researchers (Hayles, Cicconi, Bolter, Viires etc.) concerning its definition and typology are examined. In addition, the issue of hybridity is discussed. This is a notion which has given rise to various inquiries concerning the characteristics, the literariness and the future of electronic literature, as well as the relation between cyber-literature and other digital media, such as video games. The aforementioned insights testify to the necessity of an analytical theoretical metalanguage which takes into consideration the twofold nature of literary cybertexts, as both literary constructions and technological products. Finally, a mapping of cyber-literature in Greece is undertaken.
Εύρεση και αξιοποίηση περιορισμών μεταξύ ετικετών σε δεδομένα πολλαπλών ετικετών
Creators: name: Παπαγιαννοπούλου, Χριστίνα Πρόδρομου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Περιορισμοί Ετικετών
Μηχανική Μάθηση
Δεδομένα Πολλαπλών Ετικετών
Label Constraints
Machine Learning
Multi-Label Data

description: Η διπλωματική εργασία έχει δύο κύριες κατευθύνσεις. Αρχικά, ασχολούμαστε με την εύρεση σχέσεων μεταξύ των ετικετών σε δεδομένα πολλαπλών ετικετών και έπειτα χρησιμοποιούμε τις σχέσεις αυτές για να βελτιώσουμε την απόδοση του μοντέλου μάθησης πάνω στα συγκεκριμένα δεδομένα. Σε ό,τι αφορά την εύρεση σχέσεων (περιορισμών) μεταξύ των ετικετών, εστιάζουμε την προσοχή μας σε δύο είδη σχέσεων: το πρώτο είδος αφορά στις αμοιβαία αποκλειόμενες ετικέτες, δηλαδή ετικέτες που δε συνυπάρχουν στο ίδιο παράδειγμα του συνόλου δεδομένων, και το δεύτερο είδος περιλαμβάνει τις ετικέτες που η ύπαρξη της μίας συνεπάγεται την ύπαρξη της άλλης σε κάθε παράδειγμα του συνόλου δεδομένων. Το δεύτερο κομμάτι αφορά στην αξιοποίηση των περιορισμών μεταξύ των ετικετών που βρέθηκαν σε ένα σύνολο δεδομένων. Πιο συγκεκριμένα, η πληροφορία που προκύπτει από τους περιορισμούς μεταξύ των ετικετών “εντάσσεται” στις πιθανότητες που μας δίνει ο αλγόριθμος μάθησης. Η αναπαράσταση των περιορισμών γίνεται με τη χρήση δικτύων Bayes και η “ένταξη” της πληροφορίας που προέκυψε από αυτούς γίνεται με τη βοήθεια Bayesian αλγορίθμων.
description: This thesis has two objectives. Initially, we focus on finding relationships (constraints) between the labels in multi-label datasets, and then we use these relations to improve the performance of the learning model on the specified data. We focus on two kinds of relations (constraints) between the labels. The first one concerns mutually exclusive labels, i.e. labels that do not coexist in the same instance of the dataset. The second one concerns the labels which the presence of one implies the existence of the other in each instance of a dataset. The second part concerns the exploitation of the constraints between the labels which are found in a dataset. More specifically, the information which is derived from the constraints between the labels is incorporated into the probabilities that the learning algorithm gives us. The constraints become Bayes networks and the "integration" of the information from them is made by means of Bayesian algorithms.
МЕТОДОЛОГИЯ РАЗВИТИЯ КРИТИЧЕСКОГО ОПЕРАТИВНОГО МЫШЛЕНИЯ ЧЕРЕЗ ПЕДАГОГИЧЕСКАЯ КОММУНИКАЦИЯ ПРИ ПРЕПОДАВАНИИ НАУКИ МЕДИЦИНСКОЙ РАДИОЛОГИИ В ВУЗАХ МЕДИЦИНСКОГО ОБРАЗОВАНИЯ.
Creators: name: Шукурова, Севара
Publisher: name: Zenodo
Year: 2024

description: В медицине очень важна роль медицинских изображений в области радиологии. Точность медицинских изображений и высокое качество изображений очень важны для лечащего врача при постановке точного диагноза пациенту. Обработка, хранение, преобразование медицинских изображений, преобразование из аналоговой формы в цифровую.
Point-of-Interest Recommender Systems based on Location-Based Social Networks: A Survey from an Experimental Perspective
Creators: name: Sánchez, Pablo
name: Bellogín, Alejandro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Point-of-Interest recommendation is an increasing research and developing area within the widely adopted technologies known as Recommender Systems. Among them, those that exploit information coming from Location-Based Social Networks (LBSNs) are very popular nowadays and could work with different information sources, which pose several challenges and research questions to the community as a whole. We present a systematic review focused on the research done in the last 10 years about this topic. We discuss and categorize the algorithms and evaluation methodologies used in these works and point out the opportunities and challenges that remain open in the field. More specifically, we report the leading recommendation techniques and information sources that have been exploited more often (such as the geographical signal and deep learning approaches) while we also alert about the lack of reproducibility in the field that may hinder real performance improvements.
description: Submitted in Jul 2020 (revised in September 2021, accepted in January 2022, online January 2022)
Analysis of Two Binary Stars and a Blue Straggler in Messier 67
Creators: name: Brady, Kristin
name: Sneden, Chris
name: Pilachowski, Caty
name: Mace, Greg
name: Jaffe, Daniel
name: Gosnell, Natalie
name: Seifert, Richard
Publisher: name: Zenodo
Year: 2021

description: We report on the detailed analysis of three candidate blue straggler stars, S277, S997, and S1031, in the old open cluster M67 (NGC 2682), based on observations made with the high resolution Immersion GRating INfrared Spectrograph (IGRINS) at the McDonald Observatory 2.7m telescope at a resolving power of R~45,000. Species analyzed include C, Mg, Al, Si, S, Ca, Fe, and Ni from atomic features in the H and K bands.
The interaction of young massive stars with their environment: A millimeter and submillimeter line study of NGC6334 FIR II
Creators: name: Zhang, J. S.
name: Henkel, C.
name: Mauersberger, R.
name: Chin, Y. -N.
name: Menten, K. M.
name: Tieftrunk, A. R.
name: Belloche, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using the 15-m Swedish ESO Sub-millimeter Telescope (SEST), CO, HCN, and HCO+ observations of the galactic star-forming region NGC6334 FIR II are presented, complemented by [C I] 3^P_1--3^P_0 and 3^P_2--3^P_1 data from the Atacama Pathfinder Experiment (APEX 12-m telescope). Embedded in the extended molecular cloud and associated with the H II region NGC6334--D, there is a molecular "void". [C I] correlates well with 13^CO and other molecular lines and shows no rim brightening relative to molecular cloud regions farther off the void. While an interpretation in terms of a highly clumped cloud morphology is possible, with photon dominated regions (PDRs) reaching deep into the cloud, the data do not provide any direct evidence for a close association of [C I] with PDRs. Kinetic temperatures are ~40--50K in the molecular cloud and >=200K toward the void. CO and [C I] excitation temperatures are similar. A comparison of molecular and atomic fine structure line emission with the far infrared and radio continuum as well as the distribution of 2.2um H_2 emission indicates that the well-evolved H II region expands into a medium that is homogeneous on pc-scales. If the H_2 emission is predominantly shock excited, both the expanding ionization front (classified as subsonic, "D-type") and the associated shock front farther out (traced by H_2) can be identified, observationally confirming for the first time a classical scenario that is predicted by evolutionary models of H II regions. Integrated line intensity ratios of the observed molecules are determined, implying a mean C18^O/C17^O abundance ratio of 4.13+-0.13 that reflects the 18^O/17^O isotope ratio. This ratio is consistent with values determined in nearby clouds. Right at the edge of the void, however, the oxygen isotope ratio might be smaller.
description: 18 pages, 13 figures, 3 tables, A&A in press
Το τέμενος Ισκεντέρ Μπέη στα Γιαννιτσά: μελέτη τεκμηρίωσης και αποκατάστασης
Creators: name: Λουκμά, Μαρία Ανδρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Οθωμανική Αρχιτεκτονική
Τεμένος
Γιαννιτσά
Ottoman Architecture
Mosque
Giannitsa

description: Σκοπός της μεταπτυχιακής διπλωματικής εργασίας ήταν η μελέτη τεκμηρίωσης και αποκατάστασης ενός οθωμανικού κτιρίου δημόσιας χρήσης, του τεμένους Ισκεντέρ Μπέη που βρίσκεται στην πόλη των Γιαννιτσών του νομού Πέλλας. Το κτίριο του τεμένους που υπάρχει στις ημέρες μας θεωρούμε ότι κατασκευάστηκε στις αρχές του 16ου αιώνα για να καλύψει τις θρησκευτικές ανάγκες των κατοίκων της περιοχής. Με το πέρασμα όμως των αιώνων η μορφή του αλλοιώθηκε και όταν έπαψε πια να καλύπτει τις ανάγκες αυτές των κατοίκων, απαξιώθηκε και μετατράπηκε σε αποθηκευτικό χώρο. Η αρχική του μορφή δυστυχώς δεν σώζεται, ωστόσο διατηρούνται κάποια δομικά και αρχιτεκτονικά στοιχεία, που μπορούν να δώσουν πληροφορίες για την εικόνα που είχε.
description: The aim of the present postgraduate thesis was the study and documentation of an Ottoman public building, “Iskender Bey mosque” which is located in the town of Giannitsa of Pella. The building of the mosque which survives in our days is considered to be constructed in the early 16th century in order to meet the religious needs of local residents. Over the centuries its form was altered. So when the initial need stopped to exist it was demissioned and converted into storage space. The change brought about significant changes in structure. Its original form unfortunately does not exists, but some structural and architectural elements are retained, which can provide information about its original shape.
THE SUBTERAHERTZ SOLAR CYCLE: POLAR AND EQUATORIAL RADII DERIVED FROM SST AND ALMA
Creators: name: Menezes, Fabian
Publisher: name: Zenodo
Year: 2021
Subjects: Solar atmosphere, Center to limb observations, Time series analysis, Solar radio emission

description: At subterahertz frequencies – i.e., millimeter and submillimeter wavelengths – there is a gap of mea- surements of the solar radius as well as other parameters of the solar atmosphere. As the observational wavelength changes, the radius varies because the altitude of the dominant electromagnetic radiation is produced at different heights in the solar atmosphere. Moreover, radius variations throughout long time series are indicative of changes in the solar atmosphere that may be related to the solar cycle. Therefore, the solar radius is an important parameter for the calibration of solar atmospheric models enabling a better understanding of the atmospheric structure. In this work we use data from the So- lar Submillimeter-wave Telescope (SST) and from the Atacama Large Millimeter/submillimeter Array (ALMA), at the frequencies of 100, 212, 230, and 405 GHz, to measure the equatorial and polar radii of the Sun. The radii measured with extensive data from the SST agree with the radius-vs-frequency trend present in the literature. The radii derived from ALMA maps at 230 GHz also agree with the radius-vs-frequency trend, whereas the 100-GHz radii are slightly above the values reported by other authors. In addition, we analyze the equatorial and polar radius behavior over the years, by determin- ing the correlation coefficient between solar activity and subterahertz radii time series at 212 and 405 GHz (SST). The variation of the SST-derived radii over 13 years are correlated to the solar activity when considering equatorial regions of the solar atmosphere, and anticorrelated when considering polar regions. The ALMA derived radii time series for 100 and 230 GHz show very similar behaviors with those of SST.
Έλεγχος ελαστικότητας σε NoSQL βάσεις δεδομένων σε περιβάλλοντα νέφους με χρήση μεθόδων ελέγχου μοντέλων
Creators: name: Νάσκος, Αθανάσιος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: ελαστικότητα
περιβάλλον νέφους
έλεγχος μοντέλων
elasticity
cloud
model checking

description: Τα περιβάλλοντα νέφους μπορούν να χαρακτηριστούν ως Computing as a Service (CaaS), όπου το λογισμικό και το εικονοποιημένο (virtualised) υλικό είναι διαθέσιμα κατά βούληση με βάση πολιτικών κοστολόγησης των παρόχων, κατά τις οποίες η πληρωμή των πόρων γίνεται μόνο κατά την χρήση τους (pay-as-you-go). Η ελαστική φύση των περιβαλλόντων νέφους επιτρέπει στους χρήστες να προσαρμόζουν, αυξομειώνοντας δυναμικά τους παρεχόμενους πόρους, ανάλογα με τις διακυμάνσεις των απαιτήσεων των συστημάτων τους. Πλέον αποτελούν τη βασική επιλογή για επεξεργασία τεράστιων όγκων δεδομένων από μικρές, μεσαίες ή μεγάλες επιχειρήσεις και οργανισμούς, καθώς η ελαστικότητα που προσφέρουν προβάλλει οικονομικά ευνοϊκή, σε σύγκριση με την επένδυση μεγάλων ποσών σε υποδομές βάσει των υψηλότερων αναμενόμενων απαιτήσεων σε πόρους. Στα περιβάλλοντα αυτά, οι λεγόμενες NoSQL Βάσεις Δεδομένων αποδεικνύονται πολύ πρακτικές. Ένα σύστημα ανοιχτού κώδικα που συνδυάζει τις δυνατότητες υπολογισμού νέφους και NoSQL βάσεων δεδομένων είναι το TIRAMOLA. Η παρούσα μεταπτυχιακή διπλωματική εργασία ασχολείται με την ελαστική διαχείριση των πόρων των περιβαλλόντων νέφους στα οποία εκτελούνται διάφορες λειτουργίες σε NoSQL βάσεις δεδομένων, κάνοντας χρήση διαδικασιών ελέγχου μοντέλων. Στόχος της εργασίας αποτελεί ο εμπλουτισμός του συστήματος TIRAMOLA με τη χρήση του εργαλείου ελέγχου πιθανοκρατικών μοντέλων Prism.
description: Cloud computing can be succinctly described as computing as a service where software, platforms and virtualised hardware are available on-demand on a pay-as-you-go basis from a cloud provider. The elastic nature of the cloud enables customers to adapt service usage to meet fine-grained variations of their resource requirements by dynamically scaling their computing services up or down. Small, medium and large companies and organizations prefer cloud for massive data management, as the elasticity it provides seems economically favorable in comparison to making large initial investments on infrastructure based on requirements for peak demand. NoSQL databases applied on cloud environments have proved to be very practical. TIRAMOLA, is a fully modular cloud-enabled open-source framework that can adaptively resize NoSQL clusters according to user-defined policies and incoming load. This master thesis deals with the elastic resource management of cloud environments running NoSQL databases utilizing model checking techniques. The main goal of this thesis is the enrichment of TIRAMOLA framework with the utilization of the probabilistic model checking tool Prism.
Stellar Rotation in the Gaia Era: Revised Open Clusters Sequences
Creators: name: Godoy-Rivera, Diego
name: Pinsonneault, Marc H.
name: Rebull, Luisa M.
Publisher: name: Zenodo
Year: 2021
Subjects: Stellar systems, clusters, and associations
Cool Stars on the main sequence

description: The period versus mass diagrams (i.e., rotational sequences) of open clusters provide crucial constraints for angular momentum evolution studies. However, their memberships are often heavily contaminated by field stars, which could potentially bias the interpretations. In this work, we use data from Gaia DR2 to re-assess the memberships of seven open clusters with rotational data, and present an updated view of stellar rotation as a function of mass and age. We use the Gaia astrometry to identify the cluster members in phase-space, and applying our membership analysis to the rotational sequences reveals that: 1) the contamination in clusters observed from the ground can reach up to $\sim$ 35%; 2) the overall fraction of rotational outliers decreases substantially when the field contaminants are removed, but some outliers still persist; 3) there is a sharp upper edge in the rotation periods at young ages; 4) stars in the 1.0–0.6 $M_{\odot}$ range inhabit a global maximum in terms of rotation periods, potentially providing an optimal window for habitable planets. Additionally, we see clear evidence for a strongly mass-dependent spin-down process. In the regime where rapid rotators are leaving the saturated domain, the rotational distributions broaden (in contradiction with popular models), which we interpret as evidence that the torque must be lower for rapid rotators than for intermediate ones. The cleaned rotational sequences from ground-based observations can be as constraining as those obtained from space.
Control of Plasmons in Topological Insulators via Local Perturbations
Creators: name: Guan, Yuling
name: Jiang, Zhihao
name: Haas, Stephan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We use a fully quantum mechanical approach to demonstrate control of plasmonic excitations in prototype models of topological insulators by molecule-scale perturbations. Strongly localized surface plasmons are present in the host systems, arising from the topologically non-trivial single-particle edge states. A numerical evaluation of the RPA equations for the perturbed systems reveals how the positions and the internal electronic structure of the added molecules affect the degeneracy of the locally confined collective excitations, i.e., shifting the plasmonic energies of the host system and changing their spatial charge density profile. In particular, we identify conditions under which significant charge transfer from the host system to the added molecules occurs. Furthermore, the induced field energy density in the perturbed topological systems due to external electric fields is determined.
description: 10 pages, 12 figures
Additional file 1 of Assessment of a training project of English as a media of instruction(EMI) using Kirkpatrick model
Creators: name: Zhao, Wenlan
name: Liu, Zixian
name: Wang, Tong
name: Yin, Xiaohan
name: Sun, Yanchun
name: Zhang, Xuemei
name: Yang, Hui
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Biotechnology
subject: Science Policy
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Mental Health

description: Supplementary Material 1
Self-trapping of polychromatic light in nonlinear photonic lattices
Creators: name: Motzek, Kristian
name: Sukhorukov, Andrey A.
name: Kivshar, Yuri S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study dynamical reshaping of polychromatic beams due to collective nonlinear self-action of multiple-frequency components in periodic photonic lattices and predict the formation of polychromatic discrete solitons facilitated by localization of light in spectral gaps. We show that the self-trapping efficiency and structure of emerging polychromatic gap solitons depends on the spectrum of input beams due to the lattice-enhanced dispersion, including the effect of crossover from localization to diffraction in media with defocusing nonlinearity.
description: 4 pages, 3 figures
Atomistic calculations of charged point defects at grain boundaries in SrTiO$_3$
Creators: name: Tao, Cong
name: Mutter, Daniel
name: Urban, Daniel F.
name: Elsässer, Christian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Oxygen vacancies have been identified to play an important role in accelerating grain growth in polycrystalline perovskite-oxide ceramics. In order to advance the fundamental understanding of growth mechanisms at the atomic scale, classical atomistic simulations were carried out to investigate the atomistic structures and oxygen vacancy formation energies at grain boundaries in the prototypical perovskite-oxide material SrTiO$_3$. In this work, we focus on two symmetric tilt grain boundaries, namely $Σ$5(310)[001] and $Σ$5(210)[001]. A one-dimensional continuum model is adapted to determine the electrostatic potential induced by charged lattice planes in atomistic structure models containing grain boundaries and point defects. By means of this model, electrostatic artifacts, which are inherent to supercell models with periodic or open boundary conditions, can be taken into account and corrected properly. We report calculated formation energies of oxygen vacancies on all the oxygen sites across boundaries between two misoriented grains, and we analyze and discuss the formation-energy values with respect to local charge densities at the vacant sites.
description: 31 pages, 12 figures
Διερεύνηση επιμορφωτικών αναγκών φιλολόγων σε πολυπολιτισμικά σχολεία
Creators: name: Καραμπάσης, Νικόλαος Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Διερεύνηση επιμορφωτικών αναγκών
Πολιτισμική ετερότητα
Διαπολιτισμική ικανότητα
Training needs' assessment
Cultural diversity
Intercultural competence

description: Σκοπός της διατριβής ήταν η διερεύνηση των επιμορφωτικών αναγκών των φιλολόγων που υπηρετούν σε σχολεία με πολυπολιτισμική σύνθεση του μαθητικού δυναμικού. Στο πρώτο τμήμα της παρουσιάστηκε η πολιτισμική ετερότητα των μαθητών στο σύγχρονο σχολείο, τα αίτια και οι συνέπειες. Στη συνέχεια ορίστηκε ο όρος «Διαπολιτισμική ικανότητα» και καταδείχθηκε η ανάγκη κατοχής της από τους εκπαιδευτικούς στις σύγχρονες πολυπολιτισμικές κοινωνίες. Έπειτα, παρουσιάστηκαν οι φάσεις σχεδιασμού ενός προγράμματος διαπολιτισμικής εκπαίδευσης και κατάρτισης, με έμφαση στη φάση της Διερεύνησης Επιμορφωτικών Αναγκών, καθώς επίσης και μοντέλα διερεύνησης αναγκών. Στο δεύτερο τμήμα παρουσιάστηκε η διαδικασία και μεθοδολογία της έρευνας, τα αποτελέσματα και οι συσχετίσεις μεταξύ των μεταβλητών, καθώς επίσης και η σύγκριση μεταξύ ρητών και άρρητων αναγκών.
description: The aim of the present thesis was the Training Needs’ Assessment of Literature, Language and History teachers who work in multicultural schools. In the first part, students’ cultural diversity was presented, its causes and consequences as well. Furthermore, the term “Intercultural competence” was defined and the need of its possession from teachers in contemporary multicultural societies was demonstrated. The design phases of an In-Service training program were also presented and Training Needs’ Assessment was emphasized. In addition, we presented several TNA models. In the second part, we presented the research’s process and methodology, the results and the correlations. Lastly, we made a comparison between the expressed and non-expressed needs
Ανάπτυξη και αξιολόγηση ενός ενεργειακά αποδοτικού υβριδικού ευρυζωνικού δικτύου πρόσβασης
Creators: name: Μελίδης, Παναγιώτης Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Εξοικονόμηση ενέργειας
Ενεργειακά αποδοτική δρομολόγηση
Υβριδικά δίκτυα πρόσβασης
Power saving
Energy efficient routing
Hybrid access networks

description: Στην παρούσα διπλωματική εργασία μελετήθηκαν και εφαρμόστηκαν τεχνικές εξοικονόμησης ενέργειας σε ένα υβριδικό ευρυζωνικό δίκτυο πρόσβασης. Παρουσιάστηκε ένας αλγόριθμος αδρανοποίησης, για την αδρανοποίηση των συσκευών του δικτύου που υπολειτουργούν, και ένας αλγόριθμος ενεργειακής δρομολόγησης, ο οποίος μετάγει την κίνηση του δικτύου από τα μονοπάτια με τον μικρότερο υπολειπόμενο φόρτο. Προκειμένου να αξιολογηθούν οι δυνατότητες των τεχνικών εξοικονόμησης ενέργειας, αναπτύχθηκε στην OMNeT++ ένας προσομοιωτής του προτύπου ITU-T G.984 (GPON), ένας προσομοιωτής του προτύπου IEEE 802.11 (Wi-Fi), και ένας τελικός προσομοιωτής για το υβριδικό δίκτυο πρόσβασης με την χρήση των παραπάνω προτύπων. Στις προσομοιώσεις που διεξήχθησαν αξιολογήθηκε η απόδοση και η ενεργειακή αποδοτικότητα του δικτύου.
description: In this thesis energy efficient techniques have been studied and developed in a hybrid broadband access network. A power-off scheme, in which underutilized network devices are shut down, and an energy routing algorithm, in which traffic is routed through the paths with the least residual capacity, are presented. In order to evaluate these techniques a series of simulators have been developed in OMNeT++, a simulator for the standard ITU-T G.984 (GPON), a simulator for the standard IEEE 802.11 (Wi-Fi), and a simulator for the access network combining these two standards. In the simulations that have been conducted, energy efficiency is evaluated in conjunction with the throughput of the network.
(De)quantization of black hole charges
Creators: name: Kobakhidze, Archil
name: McKellar, Bruce H. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We argue that magnetic and electric charges of the Reissner-Nordstrom black hole are quantized in CP conserving theories. Dequantization phenomenon occurs when CP is broken either explicitly or effectively, and, as a result, pure magnetic black holes are not possible. Two examples illustrating this phenomenon are discussed. One is the electric charge induced by the neutral pion field in a magnetically charged black hole, and another is the electric charge induced due to the massive spin-two field emerging from possible higher curvature terms.
description: 8 pp
Vacuum stability with radiative Yukawa couplings
Creators: name: Gabrielli, Emidio
name: Marzola, Luca
name: Müürsepp, Kristjan
name: Ouyang, Ruiwen
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We explore the electroweak vacuum stability in the framework of a recently proposed paradigm for the origin of Yukawa couplings. These arise as low energy effective couplings radiatively generated by portal interactions with a hidden, or dark, sector at the one-loop level. Possible tree-level Yukawa couplings are forbidden by a new underlying symmetry, assumed to be spontaneously broken by the vacuum expectation value of a new scalar field above the electroweak scale. As a consequence, the top Yukawa interaction ceases to behave as a local operator at energies above the new sector scale and, therefore, cannot contribute to the running of the quartic Higgs coupling at higher energies. By studying two complementary scenarios, we explicitly show that the framework can achieve the stability of the electroweak vacuum without particular tuning of parameters. The proposed mechanism requires the existence of a dark sector and new portal messenger scalar interactions that, connecting the Standard Model to the dark sector fields, could be tested at the LHC and future collider experiments.
description: 27 pages, 4 figures, new results and one figure added, improved text, revised version as published one
Discovery of an Extremely Short Duration 'Building Block' Flare from Proxima Centauri
Creators: name: MacGregor, Meredith
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence
Stellar activity and flares

description: At a distance of only 1.3 pc, Proxima Cen is the closest exoplanetary system orbiting an M-type flare star, making it a benchmark case to explore the properties and potential effects of stellar activity on exoplanet atmospheres. Here, we present the discovery of an extreme flaring event from Proxima Cen by the Australian Square Kilometre Array Pathfinder (ASKAP), the Atacama Large Millimeter/submillimeter Array (ALMA), the Transiting Exoplanet Survey Satellite (TESS), the du Pont telescope at Las Campanas, and the Hubble Space Telescope (HST). In the millimeter and FUV, this flare is the brightest ever detected, brightening by a factor of >1000 and >14000 as seen by ALMA and HST, respectively. The millimeter and FUV continuum emission trace each other closely during the flare, suggesting that millimeter emission could serve as a proxy for FUV emission from stellar flares and become a powerful new tool to constrain the high-energy radiation environment of exoplanets. Optical emission is decoupled, peaking at a much lower level with a time delay. The extremely short duration of this event indicates that it could originate from a single flare loop or 'building block.' These are the first results from a larger campaign executed in April-July 2019 consisting of roughly 40 hours of simultaneous observations of Proxima Cen spanning radio to X-ray wavelengths.
Rechtspolitik im Kontext der Globalisierung
Creators: name: Malko, Alexander
Publisher: name: Trier University
Year: 2014
Subjects: subject: Rechtspolitik
subject: Globalisierung
subject: legal policy
subject: globalization

description: Der vorliegende Artikel ist das Manuskript des Vortrages zum Thema "Rechtspolitik im Kontext der Globalisierung", der anlässlich der jährlichen Zeugnisvergabe an die Absolventen der Fachspezifischen Fremdsprachenausbildung im Juli 2014 an der Universität Trier gehalten wurde. Er verdeutlicht die wachsende Bedeutung der vergleichenden Rechtspolitik in einer globalisierten Welt. Besonders bei integrativen Prozessen, wie sie auf Ebene der Europäischen Union und der Eurasischen Wirtschaftsunion stattfinden, sei die Forschung im Bereich der vergleichenden Rechtspolitik von großer Bedeutung, weshalb der Autor eine aktivere Zusammenarbeit verschiedener rechtspolitischer Forschungseinrichtungen anregt.
SOuLMuSiC: Predicting Protein Solubility Changes upon point Mutations
Creators: name: Bourgeas, Raphaël
name: Pucci, Fabrizio
name: Rooman, Marianne
Publisher: name: F1000Research
Year: 2015

description: Many fields of science and industry depend on efficient production of active protein using heterologous expression in Escherichia coli. Thus, the prediction of protein solubility have already been widely developped in many studies mainly based on amino acid sequence (e.g. : PROSO II, SolPRO). Here, we deepened the field of protein engineering by the analysis of protein solubility changes upon point mutations (Δs). This analysis is based on a series of statistical potentials which are solubility-dependent. They have been extracted from datasets (built from the eSOL database) in which only proteins with certain values of solubility are considered and thus reflect their solubility properties.
In the first steps we made a statistical analysis of the mean force potentials aimed to understand the contribution of the different amino acid interactions to the free solvation energies. We also carefully analyzed and discussed the contribution of the secondary structure conformations as well as the solvent accessibility of the given residues to the solubility properties of the proteins.
In the successive step, we built a tool that uses as input the three-dimensional structure of the wild type protein to predict Δs. Here, the newly developed solubility-dependent potentials are combined with the help of an artificial neural network. The different parameters have been identified minimizing the standard deviation between the experimental and the predicted values of the Δs for a dataset of 108 mutations that belong to 18 proteins that have been collected manually from the original literature.
Su(3) Algebraic Structure of the Cuprate Superconductors Model based on the Analogy with Atomic Nuclei
Creators: name: Jin, Shuo
name: Xie, Bing-Hao
name: Pan, Feng
name: Birman, Joseph L.
name: Ge, Mo-Lin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: A cuprate superconductor model based on the analogy with atomic nuclei was shown by Iachello to have an $su(3)$ structure. The mean-field approximation Hamiltonian can be written as a linear function of the generators of $su(3)$ algebra. Using algebraic method, we derive the eigenvalues of the reduced Hamiltonian beyond the subalgebras $u(1)\bigotimes u(2)$ and $so(3)$ of $su(3)$ algebra. In particular, by considering the coherence between s- and d-wave pairs as perturbation, the effects of coherent term upon the energy spectrum are investigated.
Giant planets around young active stars
Creators: name: , Heitzmann
name: , Marsden
name: , Petit
name: , Mengel
Publisher: name: Zenodo
Year: 2021
Subjects: Young stars, Exoplanets, Hot Jupiters, Radial velocity, Doppler imaging, Gaussian processes, Bayesian inference

description: Although our understanding of how planetary systems come to exist has drastically improved over the last two decades, there is still plenty of research to be made around the formation and evolution of massive, short-orbit exoplanets e.g. hot Jupiters, warm Neptunes. Do they form through migration mechanism or through in-situ formation? By better understanding the occurrence rates of these types of planets in every stage of a star’s life, we can better understand their fate and hope to favour one formation/evolution mechanism over another. In this context, it is crucial to estimate the population of these weird planets around young stars. Unfortunately, probing young stars is notoriously difficult due to their strong magnetic activity (or ‘jitter’) inducing spurious radial velocity (RV) signals that often mask the planet(s) RV signature(s) used to detect them. In Heitzmann et al. 2021 (in prep), we attempted to recover simulated planetary signatures hidden behind real stellar RV data exhibiting large jitter. We used two distinct activity-filtering techniques (Doppler imaging and Gaussian process) and found that it is possible to hunt for short-orbit gas giants in existing data, gathered using non-stabilised spectrograph in the scope of stellar surveys.
Equilibration time in many-body quantum systems
Creators: name: Lezama, Talía L. M.
name: Torres-Herrera, E. Jonathan
name: Pérez-Bernal, Francisco
name: Lev, Yevgeny Bar
name: Santos, Lea F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Isolated many-body quantum systems quenched far from equilibrium can eventually equilibrate, but it is not yet clear how long they take to do so. To answer this question, we use exact numerical methods and analyze the entire evolution, from perturbation to equilibration, of a paradigmatic disordered many-body quantum system in the chaotic regime. We investigate how the equilibration time depends on the system size and observables. We show that if dynamical manifestations of spectral correlations in the form of the correlation hole ("ramp") are taken into account, the time for equilibration scales exponentially with system size, while if they are neglected, the scaling is better described by a power law with system size, though with an exponent larger than what is expected for diffusive transport.
description: Journal version; 10 pages, 4 figures
Multi-species integration of miRNA binding site data to improve target prediction accuracy for synaptic miRNAs
Creators: name: Heron, Samuel
name: T. Ian Simpson
Publisher: name: F1000Research
Year: 2015

description: Micro-RNAs (miRNA) are thought to play an important role in the modulation of synaptic strength during activity dependent synaptic plasticity by regulating protein synthesis. Identifying the target mRNAs of the miRNAs involved is a crucial part of understanding how this regulation takes place, but is confounded by the small size and sequence variability of miRNA binding sites (typically as few as 6-8 nucleotides). Recent studies have attempted to improve the identification of miRNA targets by isolating miRNAs and their mRNA targets as part of the RISC complex using antibodies raised against the Arg2 protein in both human and mice and sequencing the resulting RNA pools. We used data produced by this technique, in addition to other cross-species information, to produce a classification procedure for improving microRNA target prediction in the rat.
Breeding bird communities and habitat associations in the grasslands of the Chilcotin Region, British Columbia
Creators: name: Hooper, Tracey D
Publisher: name: University of British Columbia
Year: 2009

description: The objectives of this study were (1) to characterize breeding bird communities in the grasslands around Riske Creek, in the Chilcotin Region of British Columbia, (2) to identify associations between grassland habitat characteristics and breeding bird diversity and species abundances, (3) to determine the relationship between food resource availability and grassland bird diversity and species abundances, and (4) to elucidate the potential impacts of livestock grazing on breeding birds and their grassland habitats. Point—counts and spot—mapping methods were used to census birds. Habitat characteristics measured were vegetation height, vertical cover, and patchiness, horizontal cover of different physiognomic features, arthropod abundances, and site slope, aspect, elevation. The season, intensity, and grazing by livestock and California bighorn sheep within th study area were also determined. Principal component, multiple correlation, and cluster analyses were used to analyze bird/habitat associations. Eleven species of birds were common throughout the study area. They were, in order of decreasing abundance: horned lark (Eremophila alestris), vesper sparrow (Pooecetes gramineus), European starling (Sturnus vulgaris), western meadowlark (Sturnella neglecta), long—billed curlew (Numenius americanus), Brewer’s blackbird (Euihagus cyanocephalus), tree swallow (Tachycineta bicolor), mountain bluebird (Sialia currucoides), American crow (Corvus brachyrhynchos), savannah sparrow (Passerculus sandwichensis), and red crossbill (Loxia curvirostra). Three red—listed (i.e., threatened or endangered) species (upland sandpiper (Bartramia lonciicauda), Sprague’s pipit (Anthus spragueii), Brewer’s sparrow (Spizella breweri)) and two blue-listed (vulnerable) species (sharp-tailed grouse (Tympanuchus phasianellus) and short—eared owl (Asio flammeus)), were also recorded. Over 13 study sites, bird density ranged from 0.82 to 1.24 pairs/ha and Shannon’s species diversity indices ranged from 0.71 to 1.38. Vegetation structure and patchiness, horizontal cover, topographic features, and grazing characteristics combined, explained 15-96% of the variability in bird diversity and species abundances. Topographic features were most often associated with bird diversity and species abundances, possibly due to correlations between topography and vegetation structure. Vegetation structural components were the second most common features associated with birds. Although arthropod abundances explained 15—72% of variability in bird diversity and species abundances, associations between birds and food resources were often unclear. Associations between birds and grazing were also unclear.
Return of the Boltzmann Brains
Creators: name: Page, Don N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Linde in hep-th/0611043 shows that some (though not all) versions of the global (volume-weighted) description avoid the "Boltzmann brain" problem raised in hep-th/0610079 if the universe does not have a decay time less than 20 Gyr. Here I give an apparently natural version of the volume-weighted description in which the problem persists, highlighting the ambiguity of taking the ratios of infinite volumes that appear to arise from eternal inflation.
description: 7 pages, LaTeX
Intelligent techniques to support online mental health communities - resource recommendations for 4 levels of stepped care
Creators: name: Pretorius, C
name: Coyle, D
name: Chambers, D
Publisher: name: Zenodo
Year: 2018

description: The objective of the research project is to develop an online tool that facilitates help-seeking for young people. It is intended that the tool will provide a positive experience and make it easier for young people to find suitable support relative to their need.
Impulse data models for the inverse problem of electrocardiography
Creators: name: Peng, Tommy
name: Malik, Avinash
name: Bear, Laura R.
name: Trew, Mark L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Machine Learning (cs.LG)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: The proposed method re-frames traditional inverse problems of electrocardiography into regression problems, constraining the solution space by decomposing signals with multidimensional Gaussian impulse basis functions. Impulse HSPs were generated with single Gaussian basis functions at discrete heart surface locations and projected to corresponding BSPs using a volume conductor torso model. Both BSP (inputs) and HSP (outputs) were mapped to regular 2D surface meshes and used to train a neural network. Predictive capabilities of the network were tested with unseen synthetic and experimental data. A dense full connected single hidden layer neural network was trained to map body surface impulses to heart surface Gaussian basis functions for reconstructing HSP. Synthetic pulses moving across the heart surface were predicted from the neural network with root mean squared error of $9.1\pm1.4$%. Predicted signals were robust to noise up to 20 dB and errors due to displacement and rotation of the heart within the torso were bounded and predictable. A shift of the heart 40 mm toward the spine resulted in a 4\% increase in signal feature localization error. The set of training impulse function data could be reduced and prediction error remained bounded. Recorded HSPs from in-vitro pig hearts were reliably decomposed using space-time Gaussian basis functions. Predicted HSPs for left-ventricular pacing had a mean absolute error of $10.4\pm11.4$ ms. Other pacing scenarios were analyzed with similar success. Conclusion: Impulses from Gaussian basis functions are potentially an effective and robust way to train simple neural network data models for reconstructing HSPs from decomposed BSPs. The HSPs predicted by the neural network can be used to generate activation maps that non-invasively identify features of cardiac electrical dysfunction and can guide subsequent treatment options.
description: Accepted by IEEE Journal of Biomedical and Health Informatics
Coupled Effects in Quantum Dot Nanostructures with Nonlinear Strain and Bridging Modelling Scales
Creators: name: Melnik, Roderick V. N.
name: Mahapatra, Roy
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We demonstrate that the conventional application of linear models to the analysis of optoelectromechanical properties of nanostructures in bandstructure engineering could be inadequate. The focus of the present paper is on a model based on the coupled Schrodinger-Poisson system where we account consistently for the piezoelectric effect and analyze the influence of different nonlinear terms in strain components. The examples given in this paper show that the piezoelectric effect contributions are essential and have to be accounted for with fully coupled models. While in structural applications of piezoelectric materials at larger scales, the minimization of the full electromechanical energy is now a routine in many engineering applications, in bandstructure engineering conventional approaches are still based on linear models with minimization of uncoupled, purely elastic energy functionals with respect to displacements. Generalizations of the existing models for bandstructure calculations are presented in this paper in the context of coupled effects.
description: 24 pages, 1 table, 15 figures
Η Βιομηχανική Πολιτική της Αυστρίας
Creators: name: Μαυρίδου, Χαρίκλεια Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Βιομηχανική Πολιτική
Αυστρία
Industrial Policy
Austria

description: Στην παρούσα διπλωματική εργασία αναλύεται η επίδραση τριών βασικών μεταβλητών του διεθνούς εμπορίου στις εξαγωγές της Αυστρίας. Είναι γεγονός ότι οι εξαγωγές αποτελούν καίριο βήμα για την οικονομική ανάπτυξη των αναπτυσσόμενων οικονομιών. Θα εξετάσουμε δηλαδή αν η παραγωγικότητα, το μισθολογικό βάρος και οι δαπάνες για Έρευνα και Ανάπτυξη, οι οποίες διαμορφώνονται από το Αυστριακό κράτος κυρίως μέσω της Βιομηχανικής Πολιτικής, επηρεάζουν τις Αυστριακές εξαγωγές. Η επιλογή της χώρας βασίζεται στην επιθυμία ανάλυσης μιας εύρωστης οικονομίας της Ευρωπαϊκής Ένωσης που έχει παρόμοια δομή με την μεγαλύτερη εξαγωγική δύναμη της Ευρώπης, τη Γερμανία. Η διαμόρφωση της Αυστριακής Βιομηχανικής Πολιτικής έλαβε υπόψη της τις διεθνείς εξελίξεις και συνθήκες γύρω από την παγκοσμιοποίηση των αγορών, τις μεταβολές στα πρότυπα ανταγωνισμού, τις ριζικές τεχνολογικές αλλαγές και τις υπερεθνικές ολοκληρώσεις. Επιπλέον, η χάραξη της Βιομηχανικής Πολιτικής έγινε με γνώμονα τους περιορισμούς ως προς τα διαθέσιμα εργαλεία πολιτικής που απορρέουν από τη συμμετοχή της Αυστρίας στην Ευρωπαϊκή Ένωση. Τα αποτελέσματα της Εμπειρικής μας μελέτης αποδεικνύουν ότι ο λόγος R&D/Turnover είναι στατιστική σημαντική μεταβλητή για τον προσδιορισμό των εξαγωγών της Αυστρίας.
description: This study analyzes the effect of three key variables of international trade in exports of Austria. It is fact that exports are a key step for the economic growth of developing economies. We will consider that if the productivity, wage burden and costs for research and development, which are formed by the Austrian state mainly through the Industrial Policy, are affecting Austrian exports. The choice of the country is based on the desire of analyzing a robust economy in the European Union that has a similar structure as the largest export power of Europe, Germany .The configuration of the Austrian Industrial Policy took account of international developments and circumstances surrounding the globalization of markets, changes in competition standards, the radical technological changes and supranational integration. Moreover, the formulation of industrial policy was driven restrictions on the available policy tools arising from the participation of Austria in the European Union. The results of our empirical study show that the ratio of R & D / Turnover is statistically significant variable in determining exports of Austria.