cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Μελέτη της επίδρασης ανόργανων πυριτικών αργίλων στην κρυστάλλωση, θερμική διάσπαση και στο μεταπολυμερισμό στερεάς κατάστασης του πολύ(τερεφθαλικού αιθυλενεστέρα):
Creators: name: Καρανδρέα, Εύα Εμμανουήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Πολυ(τερεφθαλικός αιθυλενεστέρας)
Νανοσύνθετα
Πολυμερισμός Στερεάς Κατάστασης
Poly(ethylene terephthalate)
Nanocomposites
Solid State Polymerization

description: Στη παρούσα εργασία, παρασκευάστηκαν νανοσύνθετα υλικά πολυ(τερεφθαλικού αιθυλενεστέρα) (PET) με διαφορετικούς τύπους οργανοπυριτικών φυλλόμορφων νανοπρόσθετων με τη χρήση της τεχνικής ανάμιξης τήγματος. Δύο είδη εμπορικών ανόργανων πυριτικών άργιλων μελετήθηκαν (Λαπονίτης-συνθετικός εκτορίτης και Κουνίπια-Μοντμοριλλονίτης) μετά από κατιοανταλλαγή με βρωμιούχο εξαδεκυλτριμεθυλαμμώνιο (CTAB) καθώς και δύο εμπορικοί οργανικά τροποποιημένοι μοντομοριλλονίτες (Νανομερές Ι30Ε τροποποιημένο με ιόντα οκταδεκυλαμμωνίου και Cloisite 10A). Η δομή των νανοσύνθετων υλικών μελετήθηκε με κρυσταλλογραφία ακτίνων Χ (XRD), μετρήθηκε το ιξώδες τους και υπολογίστηκε το μοριακό τους βάρος πριν και μετά τον πολυμερισμό στερεάς κατάστασης (SSP), και έγινε ανάλυση ακραίων ομάδων. Επίσης μελετήθηκε η επίδραση των νανοπροσθέτων στις θερμικές ιδιότητες και στην κρυστάλλωση του PET με τη χρήση διαφορικής θερμιδομετρίας σάρωσης (DSC) και πολωτικής μικροσκοπίας. Τέλος, μελετήθηκε η επίδραση των προσθέτων στο μηχανισμό θερμικής αποικοδόμησης του PET με τη χρήση αέριας χρωματογραφίας συζευγμένης με φασματοσκοπία μαζών και πυρολύτη (Py-GC-MS).
description: In the current investigation, nanocomposites of poly(ethylene terephthalate) (PET) with different types of organo-clays were produced using the melt mixing technique. Two types of commercial inorganic clays (Laponite-synthetic hectorite and Kunipia-montmorillonite) were studied after cation-exchange with hexadecyltrimethylammonium bromide (CTAB) while two commercial organo-modified montmorillonite clays (Nanomer I.30E modified with primary octadecylammonium ions and Cloisite 10A modified with quaternary dimethyl benzyl hydrogenated-tallow ammonium ions) were also investigated. The structure of the nanocomposites was studied by X-ray diffraction measurements, the intrisic viscosity was measured and the molecular weight was calculated before and after solid state polymerization (SSP), and end-group analysis took place. Also the effect of the nanofillers on the thermal properties and the crystallization of PET was studied with Differential Scanning Calorimetry and Polarized Light Microscopy. Finally, the effect of the nanofillers on the mechanism of thermal degradation of PET was studied using a Pyrolizer-GC-MS system.
Learning Open Set Network with Discriminative Reciprocal Points
Creators: name: Chen, Guangyao
name: Qiao, Limeng
name: Shi, Yemin
name: Peng, Peixi
name: Li, Jia
name: Huang, Tiejun
name: Pu, Shiliang
name: Tian, Yonghong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Open set recognition is an emerging research area that aims to simultaneously classify samples from predefined classes and identify the rest as 'unknown'. In this process, one of the key challenges is to reduce the risk of generalizing the inherent characteristics of numerous unknown samples learned from a small amount of known data. In this paper, we propose a new concept, Reciprocal Point, which is the potential representation of the extra-class space corresponding to each known category. The sample can be classified to known or unknown by the otherness with reciprocal points. To tackle the open set problem, we offer a novel open space risk regularization term. Based on the bounded space constructed by reciprocal points, the risk of unknown is reduced through multi-category interaction. The novel learning framework called Reciprocal Point Learning (RPL), which can indirectly introduce the unknown information into the learner with only known classes, so as to learn more compact and discriminative representations. Moreover, we further construct a new large-scale challenging aircraft dataset for open set recognition: Aircraft 300 (Air-300). Extensive experiments on multiple benchmark datasets indicate that our framework is significantly superior to other existing approaches and achieves state-of-the-art performance on standard open set benchmarks.
description: ECCV 2020 (spotlight)
Wrapped M2/M5 Duality
Creators: name: Guica, Monica
name: Strominger, Andrew
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A microscopic accounting of the entropy of a generic 5D supersymmetric rotating black hole, arising from wrapped M2-branes in Calabi-Yau compactified M-theory, is an outstanding unsolved problem. In this paper we consider an expansion around the zero-entropy, zero-temperature, maximally rotating ground state for which the angular momentum J_L and graviphoton charge Q are related by J_L^2=Q^3. At J_L=0 the near horizon geometry is AdS_2 x S^3. As J_L^2 goes to Q^3 it becomes a singular quotient of AdS_3 x S^2: more precisely, a quotient of the near horizon geometry of an M5 wrapped on a 4-cycle whose self-intersection is the 2-cycle associated to the wrapped-M2 black hole. The singularity of the AdS_3 quotient is identified as the usual one associated to the zero-temperature limit, suggesting that the (0,4) wrapped-M5 CFT is dual near maximality to the wrapped-M2 black hole. As evidence for this, the microscopic (0,4) CFT entropy and the macroscopic rotating black hole entropy are found to agree to leading order away from maximality.
description: 10 pages, no figures
A comprehensive view of young stars with Chandra/HETG
Creators: name: Pradhan, Pragati
name: Huenemoerder, David
name: Guenther, Hans Moritz
name: Rihn Hong
Publisher: name: Zenodo
Year: 2021
Subjects: stars: coronae – stars: formation – stars: pre-main sequence – X-rays: stars

description: Abstract We present results from the archival analysis of all high resolution spectra of cool stars observed with Chandra/HETG. Thanks to the spectral resolution of HETG, we can study the individual emission lines from these stars and now have hundreds of observations to make a comprehensive study between the Classical T Tauri (CTTS) versus the Main Sequence (MS) stars possible. These emission lines reveal the physical conditions of the outer layers, which are expected to be different between active coronae and accreting young stars. Our preliminary results show that (i) in the R versus G plot, the prototypical CTTS TW Hydrae exhibit smaller density for longer wavelength lines (like Ne and O). (ii) We also perform temperature diagnostics by plotting the soft excess (i.e., H/He lines of Si, Mg, Ne and O) versus their respective line luminosities. We find a positive correlation between these two quantities. Interestingly, we also find that irrespective of whether the stars have undergone flaring during the Chandra observation or not, the trend remains the same. (iii) Finally, we report that the CTTS TW Hydrae can be distinguished as separate in the Ne X/ Ne IX versus the O VIII/O VII plot when compared against other MS stars. We discuss our findings in the light of the influence of accretion on these line formations.
Unified formalism for non-autonomous mechanical systems
Creators: name: Barbero-Liñán, María
name: a-Enríquez, Arturo Echeverrí
name: de Diego, David Martín
name: Muñoz-Lecanda, Miguel C.
name: Román-Roy, Narciso
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 37J05, 53D05, 55R10, 70H03, 70H05

description: We present a unified geometric framework for describing both the Lagrangian and Hamiltonian formalisms of regular and non-regular time-dependent mechanical systems, which is based on the approach of Skinner and Rusk (1983). The dynamical equations of motion and their compatibility and consistency are carefully studied, making clear that all the characteristics of the Lagrangian and the Hamiltonian formalisms are recovered in this formulation. As an example, it is studied a semidiscretization of the nonlinear wave equation proving the applicability of the proposed formalism.
description: 15 pp
Research on Intelligent Charging System Technology of Automobile Group
Creators: name: Yan, Kedi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper analyzes the smart charging system for dealing with issues related to large parking garages, and analyzes the relevant technical standards of intelligent charging piles application and comprehensive transportation hubs. It mainly includes the number, area and charging method of the charging piles installed in the garages. New forms of construction management is conceived, and the investment and construction are reinforced, apportioning all charging system property rights to investment parties. Simultaneously, the investors take full responsibility for the future management and operation, mainly including the collection of service fees and charging fees.
Towards Robust Atmospheric Retrievals for Cloudy L Dwarfs: Tests on T Dwarf Spectra
Creators: name: Rowland, Melanie
name: Morley, Caroline
name: Line, Michael
Publisher: name: Zenodo
Year: 2021
Subjects: Very low mass stars, brown dwarfs, stars: atmospheres, radiative transfer

description: Retrieving atmospheric properties from spectra is the only method through which properties of brown dwarf atmospheres can be determined since in situ measurements are impossible at astronomical distances. But to date, retrieval frameworks with clouds have not been robustly verified for accuracy despite the fact that clouds are abundant in cooling brown dwarfs. The overarching goal of my thesis work is to incorporate the more complex physics governing cloud formation into retrieval frameworks for cloudy L dwarf atmospheres and later for cloudy planetary atmospheres. Before this goal can be accomplished, we must first test a number of assumptions regarding thermal structure, chemical equilibrium, and uniform chemical abundances on the more straightforward and relatively cloud-free T dwarf emission spectra. Preliminary results for the benchmark T dwarf Gl 570D are presented.
Impurity Band Conduction in Si-doped \b{eta}-Ga2O3 Films
Creators: name: Rajapitamahuni, Anil Kumar
name: Thoutam, Laxman Raju
name: Ranga, Praneeth
name: Krishnamoorthy, Sriram
name: Jalan, Bharat
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: By combining temperature-dependent resistivity and Hall effect measurements, we investigate donor state energy in Si-doped \b{eta}-Ga2O3 films grown using metal-organic vapor phase epitaxy (MOVPE). High magnetic field Hall effect measurements (H = +/-90 kOe) showed non-linear Hall resistance for T < 150 K revealing two-band conduction. Further analyses revealed carrier freeze-out characteristics in both bands yielding donor state energies of ~ 33.7 and ~ 45.6 meV. The former is consistent with the donor energy of Si in \b{eta}-Ga2O3 whereas the latter suggests a residual donor state, likely associated with a DX center. This study provides a critical insight into the impurity band conduction and the defect energy states in \b{eta}-Ga2O3 using high-field magnetotransport measurements.
description: 14 pages
Spectral variability analysis of an XMM-Newton observation of Ark 564
Creators: name: Brinkmann, W.
name: Papadakis, I. E.
name: Raeth, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a spectral variability analysis of the X-ray emission of the Narrow Line Seyfert 1 galaxy Ark 564 using the data from a ~100 ks XMM-Newton observation. Taking advantage of the high sensitivity of this long observation and the simple spectral shape of Ark 564, we determine accurately the spectral variability patterns in the source. We use standard cross-correlation methods to investigate the correlations between the soft and hard energy band light curves. We also generated 200 energy spectra from data stretches of 500 s duration each and fitted each one of them with a power law plus a bremsstrahlung component (for the soft excess) and we investigated the correlations between the various best fit model parameter values. The ``power law plus bremsstrahlung'' model describes the spectrum well at all times. The iron line and the absorption features, which are found in the time-averaged spectrum of the source are too weak to effect the results of the time resolved spectral fits. We find that the power law and the soft excess flux are variable, on all measured time scales. The power law slope is also variable, and leads the flux variations of both the power law and the bremsstrahlung components. Our results can be explained in the framework of time-dependent Comptonization models. They are consistent with a picture where instabilities propagate through an extended X-ray source, affecting first the soft and then the hard photons producing regions. The soft excess could correspond to ionized disc reflection emission, in which case it responds fast to the primary continuum variations. The time scales are such that light travel times might additionally influence the observed variability structure.
description: 11 pages, 11 figures. accepted for publication by A&A
Gerichtliche Strafverfolgung im Freistaat Sachsen 2017
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Tübingen
Year: 2018
Subjects: subject: Strafverfolgung , Sachsen , Statistik
subject: 360

description: Die bundeseinheitlich durchgeführte Strafverfolgungsstatistik ist eine koordinierte Länderstatistik. Sie ist neben der Strafvollzugsstatistik und der Polizeilichen Kriminalstatistik eine der wichtigsten amtlichen Datensammlungen zur Betrachtung der Kriminalitätslage. Die Statistik gibt einen Überblick über die Entscheidungen der Strafgerichte und Entwicklung der gerichtlich registrierten Kriminalität. Als unverzichtbare Erkenntnisquelle für den Gesetzgeber, die Verwaltung, Öffentlichkeit und Wissenschaft dient sie zur Ermittlung der Ursachen, Erscheinungsformen und Entwicklung der Straffälligkeit. In der Strafverfolgungsstatistik werden alle Abgeurteilten nachgewiesen, gegen die rechtskräftig Strafbefehle erlassen wurden bzw. Strafverfahren nach Eröffnung des Hauptverfahrens durch Urteil oder Einstellungsbeschluss rechtskräftig abgeschlossen worden sind. Nicht erfasst werden Ordnungswidrigkeiten, Entscheidungen vor Eröffnung des Hauptverfahrens sowie Entscheidungen nach Rechtskraft des Urteils. Die Statistik berichtet ausführlich über die Art der Straftat, die Art und Höhe der erkannten Strafen sowie über angeordnete Maßnahmen und Maßregeln. Bei den Verurteilten werden detaillierte demographische Merkmale (z. B. Geschlecht, Alter zur Tatzeit, Staatsangehörigkeit) sowie kriminologische Besonderheiten (z. B. Untersuchungshaft, Vorstrafen, Täter-Opfer-Ausgleich) nachgewiesen. Das Datenmaterial wird über Zählkarten erhoben, die die Strafvollstreckungsbehörden (Staatsanwaltschaften, Amtsgerichte) bereitstellen. Die sächsischen Amtsgerichte übergeben die Daten des Jugendstrafrechts der Staatsanwaltschaft. Die Datenerfassung erfolgt generell bei der zuständigen Staatsanwaltschaft und wird in elektronischer Form monatlich über e-Core an das Statistische Landesamt übersendet. Im Anhang des Berichtes sind die Zählkarten der Erhebung zum allgemeinen Strafrecht und Jugendstrafrecht abgedruckt. Die in diesem Bericht dargestellten Tabellen (außer Tabelle 8) enthalten lediglich Kurzfassungen des Straftatenverzeichnisses. Sie werden nach Straftatengruppen strukturiert, die einerseits die Zusammenstellung der bis Mitte der 1990er Jahre bundesweit üblichen neun Hauptdeliktsgruppen ermöglichen. Andererseits gehen sie durch die erweiterte Darstellung stärker auf die Interessen der Datennutzer ein. Der vorliegende Statistische Bericht zur Strafverfolgungsstatistik erscheint mit der detaillierten Auswertung eines Berichtsjahres seit 2001. Hinweise und Anregungen zur weiteren Entwicklung des Statistischen Berichts werden gern entgegengenommen.
Οι κοινωνικές αναπαραστάσεις των εκπαιδευτικών για τους αλλοδαπούς μαθητές. Η διάσταση της αξιολόγησης και της ένταξής τους.
Creators: name: Πουρναρά, Μαρία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Κοινωνικές αναπαραστάσεις
Αλλοδαποί μαθητές, Διαπολιτισμική εκπαίδευση
Εκπαιδευτική αξιολόγηση, ένταξη
Social representations
Foreign students, Multicultural education
Evaluation, integration

description: Σκοπός της εργασίας μας ήταν η διερεύνηση των κοινωνικών αναπαραστάσεων των εκπαιδευτικών για τους αλλοδαπούς μαθητές. Συγκεκριμένα, παρουσιάζουμε θεωρητικά τις έννοιες της διαπολιτισμικής αγωγής, της σχολικής ένταξης του μαθητή, καθώς και την έννοια της αξιολόγησής του. Μετά τη μελέτη των κοινωνικών αναπαραστάσεων είκοσι εκπαιδευτικών σε οκτώ δημοτικά σχολεία του κέντρου της Αθήνας, παραθέτουμε τα αποτελέσματα της έρευνας. Τα αποτελέσματα παρουσιάζονται σε τρεις βασικούς άξονες, τις κοινωνικές αναπαραστάσεις για τον αλλοδαπό μαθητή, για την αξιολόγησή του, για την ένταξή του και τις πρακτικές που οι εκπαιδευτικοί προτείνουν για το σκοπό αυτό. Στην ανάλυση των συμπερασμάτων θίγεται η στάση των εκπαιδευτικών απέναντι στους αλλοδαπούς μαθητές και η δράση τους σε μία πολυπολιτισμική τάξη. Ακόμη, αναλύεται ο τρόπος με τον οποίο αξιολογούν οι εκπαιδευτικοί τους αλλοδαπούς μαθητές και οι παράγοντες που λαμβάνουν υπόψη για αυτήν την αξιολόγηση. Τέλος, αναλύονται οι κοινωνικές αναπαραστάσεις των εκπαιδευτικών για την ένταξη, τις ενταξιακές πρακτικές και τίθεται το θέμα της ανάγκης για επίμορφωση σε διαπολιτισμικά θέματα.
description: The aim of our survey was to study the teachers’ social representations towards foreign students. Specifically, we present the theoretical concepts of intercultural education, school integration and the students’ evaluation. Having interviewed twenty teachers of eight primary schools in central Athens, we present the results of our research. The results are being presented in three basic areas, the social representations regarding the foreign student, his evaluation, his integration, and the actions teachers propose aiming to this integration. Analyzing the findings, we present the teachers’ attitudes towards foreign students and their practices in a multicultural class. In addition, we analyze the way that teachers evaluate foreign students and the factors taken into account. Finally, we refer to the teachers’ social representations for integration, as well as to the issue of their need to be trained in intercultural issues.
description: Συνεργαζόμενα Τμήματα Πανεπιστήμιο Λε Μαν (Maine France, Γαλλία)
Givenness and the Licensing of Object-First Order in German: The Effect of Referential Form
Creators: name: Bader, Markus
name: Portele, Yvonne
Publisher: name: Universität Tübingen
Year: 2019
Subjects: subject: Wortstellung , Textlinguistik , Deutsch
subject: 400
subject: 430
subject: word order
subject: discourse status
subject: referential form
subject: German

description: This paper presents two experiments investigating how the referential form of the object NP affects the acceptability of German main clauses starting with either the subject or direct object. The main clause was always preceded by a context sentence introducing a human referent to which the object NP of the following sentence referred. Results show higher acceptability for SO order when the object is a personal pronoun, higher acceptability for OS order when the object is a d-pronoun, and equal acceptability for SO and OS order when the object is a demonstrative NP. We discuss the results in the context of current theories of how word order variation depends on properties of the preceding context.
Παραγωγή αναφορικών προτάσεων στην αναπτυξιακή δυσλεξία
Creators: name: Τούμπλαρη, Αιμιλία Πάνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Μαθησιακές δυσκολίες, δυσλεξία
Γλωσσικές δεξιότητες
Αναφορικές προτάσεις
Learning difficulties, dyslexia
Linguistic processes
Relative clauses

description: Ο εκπαιδευτικός κόσμος έχει αναπτύξει ένα έντονο ενδιαφέρον για τα προβλήματα μάθησης των μαθητών στο σχολείο. Τα συγκεκριμένα προβλήματα συχνά εμπίπτουν στην ευρύτερη κατηγορία των μαθησιακών δυσκολιών, όπως η δυσλεξία. Έτσι λοιπόν στο θεωρητικό μέρος της παρούσας εργασίας επιχειρείται η μελέτη της έννοιας της δυσλεξίας, των αιτιών της και της διασύνδεσης αυτής με τη γλωσσική ανάπτυξη των παιδιών και των δομών της ανάπτυξης αυτής. Στο ερευνητικό μέρος της εργασίας επιλέγεται ένα δείγμα 11 παιδιών με δυσλεξία και 11 παιδιών τυπικής ανάπτυξης, ενώ στη συνέχεια εφαρμόζονται στα συγκεκριμένα παιδιά δραστηριότητες σε σχέση με τα μορφολογικά και δομικά χαρακτηριστικά της γλώσσας, την παραγωγής μορφολογικών και συντακτικών δομών, την ανάκληση συντακτικών δομών, την ακρίβεια και ταχύτητα ανάγνωσης κειμένου και την παραγωγή αναφορικών προτάσεων υποκειμένου και αντικειμένου. Στη συνέχεια επιχειρείται η στατιστική ανάλυση των δεδομένων και η συζήτηση των αποτελεσμάτων αυτών, ενώ τέλος προτείνονται τρόποι ανάπτυξης της γλωσσικής δομής των παιδιών με δυσλεξία.
description: Educational society has developed an intense interest in learning problems of students in school. These problems often fall into the broader category of learning disabilities such as dyslexia. In the theoretical part of this thesis the concept of dyslexia, its causes and its relation to children's oral language development are studied. In the empirical part of this thesis a sample of 11 children with dyslexia and 11 children of typical development participated. Linguistic and reading tasks were administered to these participants in addition to a relative clause production task. Statistical analysis was performed on this data and the linguistic abilities of children with Dyslexia are discussed.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Νηπιαγωγών (Πανεπιστήμιο Δυτικής Μακεδονίας)
Mapping Irreality: Storyboards for Eliciting TAM Contexts
Creators: name: Von Prince, Kilu
name: Krajinović, Ana
name: Krifka, Manfred
name: Guérin, Valérie
name: Franjieh, Michael
Publisher: name: Universität Tübingen
Year: 2019
Subjects: subject: Modalität , Aktionsart , Konditionalsatz
subject: 400
subject: 490
subject: modality
subject: conditionals
subject: tense
subject: aspect

description: In this paper we study temporal-modal distinctions in six Oceanic languages of Vanuatu. We carried out storyboard-based elicitations with several speakers per language to investigate the relation between tense and modality and the role of the realis/irrealis distinction. We found that this distinction plays an important role in all languages, but that some prioritise temporal over modal reference in certain contexts.
Τροποποίηση μοντέλου πρόβλεψης του δείκτη υπεριώδους ακτινοβολίας (UV index).:
Creators: name: Νάτσης, Αθανάσιος Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Δείκτης
Υπέρυθρης
Ακτινοβολίας
MODIS
TUV
ETOPO
Index
Ultraviolet
Radiation

description: Η πρόβλεψη του δείκτη υπεριώδους ακτινοβολίας που γίνεται από το εργαστήριο Φυσικής της Ατμόσφαιρας του τμήματος Φυσικής του Α.Π.Θ. είναι απαραίτητη για την ενημέρωση του κοινού. Εδώ, γίνεται βελτίωση του υπάρχοντος υπολογιστικού μοντέλου πρόβλεψης του δείκτη υπεριώδους ακτινοβολίας με την παροχή αντιπροσωπευτικότερων δεδομένων. Το τρέχων σύστημα βασίζεται στο μοντέλο TUV και έκανε χρήση κάποιων κατά προσέγγιση τιμών του οπτικού βάθους των αεροζόλ (AOD) και του υψομέτρου της επιφάνειας. Στη παρούσα εργασία αναπτύξαμε έναν μηχανισμό (στη γλώσσα προγραμματισμού R) υπολογισμού και απεικόνισης του AOD από τα δεδομένα του οργάνου MODIS και της εύρεσης του υψομέτρου κάθε τοποθεσίας από το ψηφιακό μοντέλο υψομέτρου (DEM) ETOPO. Με τις τροποποιήσεις μας, το μοντέλο μπορεί να εκτελείται με τιμές κοντύτερα στη πραγματικότητα και υπάρχουν διαθέσιμα τα υπολογιστικά εργαλεία για παρόμοιες εφαρμογές.
description: Forecasting of the UV index which is made by the Atmospheric Physics Laboratory of the Physics Department of A.U.TH. is necessary for infroming the public. Here, we improve the existing computational model predicting the UV index, by providing the more representative data. The current system is based on the TUV model and makes use of some approximate values for the aerosol optical depth (AOD) and the surface altitude. In this work we developed a mechanism (in the programming language R) of calculating and visualizing AOD data from the MODIS instrument and finding the altitude of each site from the digital elevation model (DEM) ETOPO. With these modifications the computational model can be performed with values closer to reality and the computational tools are made available for such applications.
Corpus Data in Experimental Linguistics
Creators: name: Börner, Alicia Katharina
name: Pieper, Jutta
name: Kiss, Tibor
Publisher: name: Universität Tübingen
Year: 2019
Subjects: subject: Adverbiale , Empirische Linguistik
subject: 400
subject: 430
subject: adverbial modification
subject: empirical adequacy

description: This contribution outlines a novel way of experimental item construction which aims at integrating as much realistic data as possible in experimental studies on phenomena that seem to ban extensive recourse to natural data. As a case in point, we discuss syntactic base positions. In Modified Stimulus Composition, semantically annotated corpus data are extracted and systematically modified so as to fit an indicative test surround. With that, we arrive at near-natural experimental items covering natural lexical variability, thus preventing bias and artificiality. As the systematic derivation is captured in an annotation scheme, the method in addition facilitates further analyses of surface-related phenomena.
BiLiMO: Bit-Limited MIMO Radar via Task-Based Quantization
Creators: name: Xi, Feng
name: Shlezinger, Nir
name: Eldar, Yonina C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Recent years have witnessed growing interest in reduced cost radar systems operating with low power. Multiple-input multiple-output (MIMO) radar technology is known to achieve high performance sensing by probing with multiple orthogonal waveforms. However, implementing a low cost low power MIMO radar is challenging. One of the reasons for this difficulty stems from the increased cost and power consumption required by analog-to-digital convertors (ADCs) in acquiring the multiple waveforms at the radar receiver. In this work we study reduced cost MIMO radar receivers restricted to operate with low resolution ADCs. We design bit-limited MIMO radar (BiLiMO) receivers which are capable of accurately recovering their targets while operating under strict resolution constraints. This is achieved by applying an additional analog filter to the acquired waveforms, and designing the overall hybrid analog-digital system to facilitate target identification using task-based quantization methods. In particular, we exploit the fact that the target parameters can be recovered from a compressed representation of the received waveforms. We thus tune the acquisition system to recover this representation with minimal distortion, from which the targets can be extracted in digital, and characterize the achievable error in identifying the targets. Our numerical results demonstrate that the proposed BiLiMO receiver operating with a bit budget of one bit per sample achieves target recovery performance which approaches that of costly MIMO radars operating with unlimited resolution ADCs, while substantially outperforming MIMO receivers operating only in the digital domain under the same bit limitations.
description: 14 pages, 11 figures
Δειγματοληπτική μελέτη της διαδικτυακής ευφυΐας:
Creators: name: Καραμίχος, Αναστάσιος Μιχαήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Διαδικτυακή ευφυΐα
Συντελεστής μεταβλητότητας
Συνάρτηση πυκνότητας πιθανότητας
Web intelligence
Coefficient of variation
Probability density function

description: Τα τελευταία χρόνια η ανάπτυξη του Web είναι ραγδαία. Αυτό έχει ως συνέπεια, μέσω του Web, κάποιος να έχει πρόσβαση σε τεράστιο όγκο δεδομένων. Σε αυτό βοηθούν πολύ οι μηχανές αναζήτησης. Σήμερα υπάρχουν πολλές μηχανές αναζήτησης όπως η Google, Bing, Yahoo, κλπ. Χρησιμοποιώντας κάποιος τις παραπάνω μηχανές αναζήτησης μπορεί να δίνει ερωτήσεις χρησιμοποιώντας λέξεις- κλειδιά και να έχει απάντηση στα παραπάνω ερωτήματα σε ελάχιστο χρονικό διάστημα. Στην παρούσα διπλωματική, σε ένα δείγμα 64 μαθητών δίδονται δέκα (10) ερωτήσεις. Στη συνέχεια, υπολογίζουμε το χρόνο που έκανε ο μαθητής για να βρει την απάντηση, καθώς επίσης και τον αριθμό των βημάτων που ακολούθησε για να φτάσει στην απάντηση. Ως αριθμό βημάτων ορίζομε τον αριθμό των χτυπημάτων (κλικ) που πραγματοποιεί ο χρήστης έως ότου βρει την απάντηση. Για κάθε μία από τις παραπάνω δύο τυχαίες μεταβλητές υπολογίζεται η μέση τιμή, η διακύμανση, η τυπική απόκλιση και ο συντελεστής μεταβλητότητας. Μέσω του συντελεστή μεταβλητότητας υπολογίζεται η συνάρτηση πυκνότητας πιθανότητας (σ.π.π). Στη συνέχεια, γίνεται σύγκριση των θεωρητικών τιμών συχνοτήτων της παραπάνω συνάρτησης με τις παρατηρούμενες τιμές με χρήση του Chi-Square test.
description: In the last years the Web has grown rapidly. As a result, someone, using the Web can have access to a huge amount of data. Τo achieve this, the search engines play an important role. Today there are many search engines like Google, Bing, Yahoo, etc. Using one of these search engines someone may give key words as questions and have answers to these questions in minimum time. In this thesis a sample of sixty four (64) students are given ten (10) questions. Then, we calculate the time the students made to find the answer as well as the number of steps followed to reach the answer. As a number of steps we define the number of clicks a user types until he or she finds the answer. For each of the above two random variables we calculate the mean value, the variance, standard deviation and the coefficient of variation. Through the coefficient of variation we estimate the probability density function. Finally, we compare the theoretical frequency values of the above function with the observed values using the Chi-Square test.
Proton G_E/G_M from beam-target asymmetry
Creators: name: Jones, M. K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The ratio of the proton's electric to magnetic form factor, G_E/G_M, can be extracted in elastic electron-proton scattering by measuring either cross sections, beam-target asymmetry or recoil polarization. Separate determinations of G_E/G_M by cross sections and recoil polarization observables disagree for Q^2 > 1 (GeV/c)^2. Measurement by a third technique might uncover an unknown systematic error in either of the previous measurements. The beam-target asymmetry has been measured for elastic electron-proton scattering at Q^2 = 1.51 (GeV/c)^2 for target spin orientation aligned perpendicular to the beam momentum direction. This is the largest Q^2 at which G_E/G_M has been determined by a beam-target asymmetry experiment. The result, \muG_E/G_M = 0.884 +/- 0.027 +/- 0.029, is compared to previous world data.
description: 8 pages, 6 figures, Updated to be version published in Physical Review C
Dissecting the super-critical filaments embedded in the 0.5 pc subsonic region of Barnard 5
Creators: name: Schmiedeke, Anika
name: Pineda, Jaime E.
name: Caselli, Paola
name: Arce, Héctor G.
name: Fuller, Gary A
name: Goodman, Alyssa A.
name: Maureira, María José
name: Offner, Stella S. R.
name: Segura-Cox, Dominique
name: Seifried, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We characterize in detail the two ~0.3 pc long filamentary structures found within the subsonic region of Barnard 5. We use combined GBT and VLA observations of the molecular lines NH$_3$(1,1) and (2,2) at a resolution of 1800 au, as well as JCMT continuum observations at 850 and 450 $μ$m at a resolution of 4400 au and 3000 au, respectively. We find that both filaments are highly super-critical with a mean mass per unit length, $M/L$, of ~80 M$_\odot$ pc$^{-1}$, after background subtraction, with local increases reaching values of ~150 M$_\odot$ pc$^{-1}$. This would require a magnetic field strength of ~500 $μ$G to be stable against radial collapse. We extract equidistant cuts perpendicular to the spine of the filament and fit a modified Plummer profile as well as a Gaussian to each of the cuts. The filament widths (deconvolved FWHM) range between 6500-7000 au (~0.03 pc) along the filaments. This equals ~2.0 times the radius of the flat inner region. We find an anti-correlation between the central density and this flattening radius, suggestive of contraction. Further, we also find a strong correlation between the power-law exponent at large radii and the flattening radius. We note that the measurements of these three parameters fall in a plane and derive their empirical relation. Our high-resolution observations provide direct constraints of the distribution of the dense gas within super-critical filaments showing pre- and protostellar activity.
description: Accepted for publication in ApJ. 23 pages, 14 figures, 3 tables
title: Lagunitas Creek Bridge Replacement Project (04-0G642)
titleType: AlternativeTitle
title: Endangered Species Act Section 7(a)(2) Biological Opinion and Magnuson–Stevens Fishery Conservation and Management Act Essential Fish Habitat Response for the Lagunitas Creek Bridge Replacement Project (04-0G642)
Creators: name: United States. National Marine Fisheries Service. West Coast Region
Publisher: name: United States. National Marine Fisheries Service. West Coast Region
Year: 2025

description: WCRO-2024-01269
Towards Working Technicolor: Effective Theories and Dark Matter
Creators: name: Gudnason, Sven Bjarke
name: Kouvaris, Chris
name: Sannino, Francesco
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A fifth force, of technicolor type, responsible for breaking the electroweak theory is an intriguing extension of the Standard Model. Recently new theories have been shown to feature walking dynamics for a very low number of techniflavors and are not ruled out by electroweak precision measurements. We identify the light degrees of freedom and construct the associated low energy effective theories. These can be used to study signatures and relevant processes in current and future experiments. In our theory the technibaryons are pseudo Goldstone bosons and their masses arise via extended technicolor interactions. There are hypercharge assignments for the techniquarks which renders one of the technibaryons electrically neutral. We investigate the cosmological implications of this scenario and provide a component of dark matter.
description: RevTeX, 17 pages, 2 figures. V2: more precise explanation of formula (33)
Anomalous Hydrodynamics in One Dimensional Electronic Fluid
Creators: name: Protopopov, I. V.
name: Samanta, R.
name: Mirlin, A. D.
name: Gutman, D. B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We construct multi-mode viscous hydrodynamics for one dimensional spinless electrons. Depending on the scale, the fluid has six (shortest lengths), four (intermediate, exponentially broad regime), or three (asymptotically long scales) hydrodynamic modes. Interaction between hydrodynamic modes leads to anomalous scaling of physical observables and waves propagating in the fluid. In a four-mode regime, all modes are ballistic and acquire KPZ-like broadening with asymmetric power-law tails. "Heads" and "tails" of the waves contribute equally to thermal conductivity, leading to $ω^{-1/3}$ scaling of its real part. In a three-mode regime, the system is in the universality class of classical viscous fluid[9,24]. Self-interaction of the sound modes results in KPZ-like shape, while the interaction with the heat mode results in asymmetric tails. The heat mode is governed by Levy flight distribution, whose power-law tails give rise to $ω^{-1/3}$ scaling of heat conductivity.
description: 6+13 pages
Scattering of Gravitational Radiation: Intensity Fluctuations
Creators: name: Macquart, Jean-Pierre
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The effect of gravitational microlensing on the intensity of gravitational radiation as it propagates through an inhomogeneous medium containing small-scale structure is considered. Lensing by both stars and a power law spectrum of density perturbations is examined. The long wavelengths characteristic of gravitational radiation mandate a statistical, physical-optics approach to treat the effect of stellar microlensing. A model for the mass power spectrum of a starfield, including the effects of clustering and allowing for a distribution of stellar masses, is constructed and used to determine both the amplitude of fluctuations in the gravitational wave strain and its associated temporal fluctuation spectrum. For a uniformly distributed starfield the intensity variance scales linearly with stellar density, sigma, but is enhanced by a factor >sigma r_F^2 when clustering is important, where r_F is the Fresnel scale. The effect of lensing by a power law mass spectrum is also considered. For spectra with indices steeper than -2 the wave amplitude exhibits rms fluctuations 1.3 < Delta Sigma^2 >^0.25 (D_eff/1 Gpc)^0.5 %, where is the variance in the mass surface density measured in M_sun^2 pc^-4 and D_eff is the effective distance to the lensing medium. For shallower spectra the amplitude of the fluctuations depends additionally on the inner length scale and power law index of the density fluctuations. The intensity fluctuations are dominated by temporal fluctuations on too long a timescale to be observable.
description: A&A accepted
A Rigorous Treatment of Energy Extraction from a Rotating Black Hole
Creators: name: Finster, Felix
name: Kamran, Niky
name: Smoller, Joel
name: Yau, Shing-Tung
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The Cauchy problem is considered for the scalar wave equation in the Kerr geometry. We prove that by choosing a suitable wave packet as initial data, one can extract energy from the black hole, thereby putting supperradiance, the wave analogue of the Penrose process, into a rigorous mathematical framework. We quantify the maximal energy gain. We also compute the infinitesimal change of mass and angular momentum of the black hole, in agreement with Christodoulou's result for the Penrose process. The main mathematical tool is our previously derived integral representation of the wave propagator.
description: 19 pages, LaTeX, proof of Propositions 2.3 and 3.1 given in more detail
Η αρχή της προστασίας της δικαιολογημένης εμπιστοσύνης στο σύγχρονο κοινωνικό κράτος και η ερμηνεία της μέσα από τη νομολογία του Συμβουλίου της Επικρατείας:
Creators: name: Παλληκάρη, Δήμητρα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Δικαιολογημένη εμπιστοσύνη
Γενικές αρχές
Διοικητικό
Legitimate expectations
General principles
Administrative

description: Η αρχή της προστασίας της δικαιολογημένης εμπιστοσύνης του πολίτη προς το κράτος ανήκει στις γενικές αρχές του δημοσίου και ειδικότερα του διοικητικού δικαίου. Σκοπός της παρούσας εργασίας είναι η ανάλυση της αρχής της δικαιολογημένης εμπιστοσύνης. Συγκεκριμένα, αρχικά γίνεται η περιγραφή των προϋποθέσεων εφαρμογής καθώς και η ανάλυση των θεωριών περί νομικής θεμελίωσης. Στη συνέχεια, αναφέρεται η ιστορική εξέλιξη της εμφάνισης της αρχής στη νομολογία του Συμβουλίου της Επικρατείας και η πορεία προς την αναγνωρισμένη πλέον συνταγματική ισχύ. Τέλος, αναλύεται το πεδίο εφαρμογής της αρχής της δικαιολογημένης εμπιστοσύνης μέσω των δικαστικών αποφάσεων καθώς και οι συνέπειες από την τυχόν παραβίασή της.
description: The principle of protection of legitimate expectations of the citizen towards the state is one of the general principles of public law and in particular, administrative law. The purpose of this paper is the analysis of the principle of legitimate expectations. Specifically, firstly we describe the conditions for its application and the theories on legal foundation. Then, we refer to the historical evolution of its appearance in the jurisprudence of the Council of State and the path towards its recognized constitutional power. Finally, we analyze the scope of the principle of legitimate expectations through court decisions and the consequences in case of violation.
Minimal supergravity radiative effects on the tri-bimaximal neutrino mixing pattern
Creators: name: Hirsch, M.
name: Ma, Ernest
name: Romao, J. C.
name: Valle, J. W. F.
name: del Moral, A. Villanova
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the stability of the Harrison-Perkins-Scott (HPS) mixing pattern, assumed to hold at some high energy scale, against supersymmetric radiative corrections. We work in the framework of a reference minimal supergravity model (mSUGRA) where supersymmetry breaking is universal and flavor-blind at unification. The radiative corrections considered include both RGE running as well as threshold effects. We find that in this case the solar mixing angle can only increase with respect to the HPS reference value, while the atmospheric and reactor mixing angles remain essentially stable. Deviations from the solar angle HPS prediction towards lower values would signal novel contributions from physics beyond the simplest mSUGRA model.
description: 13 pages, 3 figures; added reference; final version for publication
Mega-MUSCLES
Creators: name: Wilson, David
name: Collaboration, The Mega-MUSCLES
Publisher: name: Zenodo
Year: 2021
Subjects: Cool Stars on the main sequence, Very low mass stars, TRAPPIST-1

description: M dwarf stars have emerged as ideal targets for exoplanet observations. Their small radii aids planetary discovery, their close-in habitable zones allow short observing campaigns, and their red spectra provide opportunities for transit spectroscopy with JWST. The potential of M dwarfs has been underlined by remarkable systems such as the seven Earth-sized planets orbiting TRAPPIST-1 and the habitable-zone planet around Proxima Centauri. Assessing the characteristics of such planets requires a firm understanding of how M dwarfs differ from the Sun, beyond just their smaller size and mass. Of particular importance are the time-variable, high-energy ultraviolet and x-ray regions of the M dwarf spectral energy distribution (SED), which can influence the chemistry and lifetime of exoplanet atmospheres, as well as their surface radiation environments. Unfortunately, those wavebands are extremely faint for most M dwarfs, requiring too large an investment of telescope time to obtain data at most stars. The Measurements of the Ultraviolet Spectral Characteristics of Low-mass Exoplanetary Systems (Mega-MUSCLES) Treasury project, together with the precursor MUSCLES project, will produce full SEDs of a representative sample of M dwarfs, covering a wide range of stellar mass, age, and planetary system architecture. We have obtained x-ray and ultraviolet data for 12 stars using the Hubble, Chandra and XMM space telescopes, along with state-of-the-art DEM modelling to fill in the unobservable extreme ultraviolet regions. Our completed SEDs will be available as a community resource, with the aim that a close MUSCLES analogue should exist for most M dwarfs of interest.
CAPTURE: A continuum imaging pipeline for the uGMRT
Creators: name: Kale, Ruta
name: H., Ishwara-Chandra C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the first fully automated pipeline for making images from the interferometric data obtained from the upgraded Giant Metrewave Radio Telescope (uGMRT) called CAsa Pipeline-cum-Toolkit for Upgraded Giant Metrewave Radio Telescope data REduction - CAPTURE. It is a python program that uses tasks from the NRAO Common Astronomy Software Applications (CASA) to perform the steps of flagging of bad data, calibration, imaging and self-calibration. The salient features of the pipeline are: i) a fully automatic mode to go from the raw data to a self-calibrated continuum image, ii) specialized flagging strategies for short and long baselines that ensure minimal loss of extended structure, iii) flagging of persistent narrow band radio frequency interference (RFI), iv) flexibility for the user to configure the pipeline for step-by-step analysis or special cases and v) analysis of data from the legacy GMRT. CAPTURE is available publicly on github (https://github.com/ruta-k/uGMRT-pipeline, release v1.0.0). The primary beam correction for the uGMRT images produced with CAPTURE is made separately available at https://github.com/ruta-k/uGMRTprimarybeam. We show examples of using CAPTURE on uGMRT and legacy GMRT data. In principle, CAPTURE can be tailored for use with radio interferometric data from other telescopes.
description: 15 pages, 5 figures, 3 tables, Accepted for publication in Experimental Astronomy
Open Source 3-D Filament Diameter Sensor for Recycling, Winding and Additive Manufacturing Machines
Creators: name: Petsiuk, Aliaksei L.
name: Pearce, Joshua M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: To overcome the challenge of upcycling plastic waste into 3-D printing filament in the distributed recycling and additive manufacturing systems, this study designs, builds, tests and validates an open source 3-D filament diameter sensor for recycling and winding machines. The modular system for multi-axis optical control of the diameter of the recycled 3-D-printer filament makes it possible to analyze the surface structure of the processed filament, save the history of measurements along the entire length of the spool, as well as mark defective areas. The sensor is developed as an independent module and integrated into a recyclebot. The diameter sensor was tested on different kinds of polymers (ABS, PLA) different sources of plastic (recycled 3-D prints and virgin plastic waste) and different colors including clear plastic. The results of the diameter measurements using the camera were compared with the manual measurements, and the measurements obtained with a one-dimensional digital light caliper. The results found that the developed open source filament sensing method allows users to obtain significantly more information in comparison with basic one-dimensional light sensors and using the received data not only for more accurate diameter measurements, but also for a detailed analysis of the recycled filament surface. The developed method ensures greater availability of plastics recycling technologies for the manufacturing community and stimulates the growth of composite materials creation. The presented system can greatly enhance the user possibilities and serve as a starting point for a complete recycling control system that will regulate motor parameters to achieve the desired filament diameter with acceptable deviations and even control the extrusion rate on a printer to recover from filament irregularities.
description: 25 pages, 16 figures, 2 tables