cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Geometric analysis of nonlinear differential-algebraic equations via nonlinear control theory
Creators: name: Chen, Yahao
name: Respondek, Witold
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 34A09, 93B17, 93B27, 93C10

description: For nonlinear differential-algebraic equations (DAEs), we define two kinds of equivalences, namely, the external and internal equivalence. Roughly speaking, the word "external" means that we consider a DAE (locally) everywhere and "internal" means that we consider the DAE on its (locally) maximal invariant submanifold (i.e., where its solutions exist) only. First, we revise the geometric reduction method in DAEs solution theory and formulate an implementable algorithm to realize that method. Then a procedure named explicitation with driving variables is proposed to connect nonlinear DAEs with nonlinear control systems and we show that the driving variables of an explicitation system can be reduced under some involutivity conditions. Finally, due to the explicitation, we will use some notions from nonlinear control theory to derive two nonlinear generalizations of the Weierstrass form.
description: 38 pages
null fast method for mobile in-situ monitoring of optical properties in aquatic environments
Creators: name: Schima, Robert
Publisher: name: Universität Rostock
Year: 2018
Subjects: subject: 550 Earth sciences
subject: 620 Engineering & allied operations
subject: 621.3 Electrical Engineering, Electronics

description: In summary, this dissertation presents a fundamental sensor development according to newly formulated sampling theorem (Object Specific Exposure - OSE) from an ocean engineering perspective. It provides a fast method based on a service-oriented optical sensor system that allows reliable statements regarding the state of aquatic (eco-) systems (turbidity and dissolved organic carbon) with feasible sensor effort during the field measurement. The technological approach presented in this thesis helps to increase the informative value of sensor data while reducing the effort for the user.
The supergravity dual of 3d supersymmetric gauge theories with unquenched flavors
Creators: name: Canoura, Felipe
name: Merlatti, Paolo
name: Ramallo, Alfonso V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We obtain the supergravity dual of N=1 supersymmetric gauge theory in 2+1 dimensions with a large number of unquenched massless flavors. The geometries found are obtained by solving the equations of motion of supergravity coupled to a suitable continuous distribution of flavor branes. The background obtained preserves two supersymmetries. We find that when N_c\ge 2N_f the behavior of the solutions is compatible with having an asymptotically free dual gauge theory with dynamical quarks. On the contrary, when N_c<2N_f the theory develops a Landau pole in the UV. We also find a new family of (unflavored) backgrounds generated by D5-branes that wrap a three-cycle of a cone with G_2 holonomy.
description: 56 pages, 11 figures; v2: references added
Η έννοια του πόνου: Ομηρος-Ησίοδος-Αισχύλος
Creators: name: Ανδρόνικου, Μαρία Χ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2003

description: Η μελέτη αυτή παρακολουθεί τη συγκρότηση και την εξέλιξη της έννοιας του πόνου στο ομηρικό έπος, στο ησιόδειο έπος και στην αισχύλεια τραγωδία. Στα γραμματειακά αυτά είδη ο πόνος ορίζεται ως μια ενέργεια την οποία τα υποκείμενα οφείλουν ή επιδιώκουν να ολοκληρώσουν. Στην Ιλιάδα και στην Οδύσσεια ο πόνος συστήνεται αποκλειστικά ως έργο ανδρων εγγράφεται στο σώμα των ηρώων και στο χρόνο της δράσης τους και συνοδεύεται από νοητικές διεργασίες η θετική ή αρνητική κατάληξή του συνεπάγεται ανάλογα συναισθήματα και έχει αντίκτυπο στο κοινωνικό επίπεδο. Στη Θεογονία ο πόνος, ως κοσμογονική οντότητα, τοποθετείται στο επίκεντρο της σύγκρουσης των αρχών της δημιουργίας ως συνέχειας και της δημιουργίας ως τάξης. Στα Έργα ο πόνος συμβάλλει καθοριστικά στη διάκριση θεών και ανθρώπων και στην εγκατάσταση της γενεαλογίας των θνητών (Πανδώρα) συναρτάται με τις θετικές αξίες (εργασία, δικαιοσύνη, ευημερία) που αντιστοιχούν στην εξέλιξη και την οργάνωση της κοινωνίας. Στον Αισχύλο ο πόνος κληρονομείται από το γένος και εντάσσεται στον οικον. Η αντιμετώπισή του συναρτάται με το βαθμό εμπλοκής του οικου με την πόλιν και αντανακλά την πορεία του πολίτη από την αρχαϊκή πόλιν προς τη δημοκρατική Αθήνα
description: In this study the author focuses on the concept of ponos and traces its construction and evolution in the poems of Homer and Hesiod and the tragedies of Aeschylus. In the above works ponos is defined as an action, which the subjects ought to or aim to fulfil. In the Iliad and the Odyssey ponos is constructed as the accomplishment of andres exclusively. It is registered on the body of the heroes and in the duration of their action; furthermore it is accompanied by mental activity; its positive or negative conclusion results in analogous feelings and also resonates at a social level. In the Theogony ponos –as a cosmogonic entity– is placed at the epicentre of the conflict between the competing principles of creation as continuity and creation as order. In the Works ponos contributes definitively to the distinction between gods and mortals and the establishment of the genealogy of mortals (Pandora). It is associated with the positive values (labour, justice, prosperity), which correspond to the evolution and structure of society. In Aeschylus ponos is handed down from genos and "enlisted" into the oikos. Facing ponos is associated with the degree of interaction between oikos and polis and reflects the transition of the polites from the archaic polis to the democratic Athens.
Iterated Differential Forms V: C-Spectral Sequence on Infinite Jet Spaces
Creators: name: Vinogradov, A. M.
name: Vitagliano, L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 58A10, 58A20, 58J10

description: In the preceding note math.DG/0610917 the $Λ_{k-1}\mathcal{C}$--spectral sequence, whose first term is composed of \emph{secondary iterated differential forms}, was constructed for a generic diffiety. In this note the zero and first terms of this spectral sequence are explicitly computed for infinite jet spaces. In particular, this gives an explicit description of secondary covariant tensors on these spaces and some basic operations with them. On the basis of these results a description of the $Λ_{k-1}\mathcal{C}$--spectral sequence for infinitely prolonged PDE's will be given in the subsequent note.
description: 9 pages, to appear in Math. Dokl
Topic in narrative discource: the case of temporal otan-clauses in modern greek
Creators: name: Λαμπροπούλου, Στέλλα Η.
Publisher: name: Aristotle University of Thessaloniki
Year: 2003
Subjects: Συν-κείμενο/περι-κείμενο
Context

description: This thesis examines the discourse functions of "when" clauses in Greek narratives. The contextual contribution of "when" clauses is studied in the light of the "topic" approach to adverbial clauses, which is developed in view of werth's(1999) cognitive discourse grammar of "text worlds". Furthermore, "when"-clauses are studied in terms of their relationship with respect to the main clause. In this connection, the presuppositional status of the "when"-clause is shown to be of crucial importance. Specifically with the loss of the subordinate character of the "when"-clause
description: Στη διατριβή αυτή εξετάζονται οι κειμενικές λειτουργίες των "όταν"-προτάσεων που εμφανίζονται σε αφηγηματικά κείμενα. Η κειμενική συμβολή των "όταν"-προτάσεων μελετάται στο πλαίσιο της προσέγγισης των επιρρηματικών προτάσεων με βάση το "θέμα". Η συγκεκριμένη προσέγγιση αναπτύσσεται και επανεξετάζεται ενόψει της γνωσιακής κειμενικής γραμματικής του Werth(1999). Επιπλέον εξετάζεται η σχέση των "όταν"-προτάσεων με την κύρια πρόταση. Στο σημείο αυτό, ιδιαίτερο ρόλο παίζει η προϋποθετικότητα της "όταν"-πρότασης. Συγκεκριμένα, παρουσιάζονται περιπτώσεις όπου η απουσία προϋποθετικότητας συμβάλει στην απουσία υποτακτικού χαρακτήρα της "όταν"-πρότασης
Imaging of single infrared, optical, and ultraviolet photons using distributed tunnel junction readout on superconducting absorbers
Creators: name: Furlan, Miha
name: Kirk, Eugenie
name: Zehnder, Alex
Publisher: name: arXiv
Year: 2006
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Single-photon imaging spectrometers of high quantum efficiency in the infrared to ultraviolet wavelength range, with good timing resolution and with a vanishing dark count rate are on top of the wish list in earth-bound astronomy, material and medical sciences, or quantum information technologies. We review and present improved operation of a cryogenic detector system potentially offering all these qualities. It is based on a superconducting absorber strip read out with superconducting tunnel junctions. The detector performance is discussed in terms of responsivity, noise properties, energy and position resolution. Dynamic processes involved in the signal creation and detection are investigated for a basic understanding of the physics, and for possible application-specific modifications of device characteristics.
description: 7 pages, 4 figures
Ακριβής μέτρηση θερμικής αγωγιμότητας στερεών υλικών
Creators: name: Γιαλού, Κατερίνα Ε.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Θερμική αγωγιμότητα
Pyrex 7740
Pyroceram 9606
AISI 304L
Thermal conductivity

description: Η διατριβή αναφέρεται στον ακριβή προσδιορισμό της θερμικής αγωγιμότητας επιλεγμένων στερεών υλικών, που αναφέρονται ως υλικά αναφοράς με την πειραματική μέθοδο του θερμαινόμενου σύρματος σε Μη-Μόνιμη κατάσταση και εντάσσεται στα πλαίσια της επιστήμης της Μετρολογίας, της επιστήμης της ακρίβειας των μετρήσεων. Παρουσιάζονται οι οργανισμοί που αναπτύσσουν διεθνή πρότυπα, οι μέθοδοι μέτρησης θερμικής αγωγιμότητας, η θεωρία της μεθόδου που χρησιμοποιήθηκε, η νέα πειραματική διάταξη και η μεθοδολογία που ακολουθήθηκε για τον υπολογισμό της θερμικής αγωγιμότητας των υλικών(Pyrex 7740, Pyroceram 9606, AISI 304L)
description: The PHD refers to the accurate measurement of the thermal conductivity of selected solid materials refered to as reference materials, with the transient Hot-Wire Method and it is part of Methodology, the science of the accurancy of measurement. The following are presented : Organisations for international standards, measurement methods of thermal conductivity, the transient Hot-Wire Method, the new experimental set up and the methodology used for the obtainment of the thermal conductivity of solid materials(Pyrex 7740, Pyroceram 9606, AISI 304L)
The Future of Ultracool Dwarf Science with JWST
Creators: name: Marley, Mark S.
name: Leggett, S. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Ultracool dwarfs exhibit a remarkably varied set of characteristics which hint at the complex physical processes acting in their atmospheres and interiors. Spectra of these objects not only depend upon their mass and effective temperature, but also their atmospheric chemistry, weather, and dynamics. As a consequence divining their mass, metallicity and age solely from their spectra has been a challenge. JWST, by illuminating spectral blind spots and observing objects with constrained masses and ages should finally unearth a sufficient number of ultracool dwarf Rosetta Stones to allow us to decipher the processes underlying the complex brown dwarf cooling sequence. In addition the spectra of objects invisible from the ground, including very low mass objects in clusters and nearby cold dwarfs from the disk population, will be seen for the first time. In combination with other ground- and space-based assets and programs, JWST will usher in a new golden era of brown dwarf science and discovery.
description: 23 pages, 9 figures, for publication in proceedings of "Astrophysics in the Next Decade: JWST and Concurrent Facilities", a meeting held Sept. 24-27 in Tucson, Arizona
Numerical solution of the Holstein polaron problem
Creators: name: Fehske, H.
name: Trugman, S. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We performed an extensive numerical analysis of the Holstein model. Combining variational Lanczos diagonalisation, density matrix renormalisation group, kernel polynomial expansion, and cluster perturbation theory techniques we solved for properties of the Holstein polaron and bipolaron problems. Numerical solution of the Holstein model means that we determined the ground-state and low-lying excited states with arbitrary precision in the thermodynamic limit for any dimension. Moreover, we calculated the spectral properties (e.g. photoemission and phonon spectra), optical response and thermal transport, as well as the dynamics of polaron formation. Our approach takes into account the full quantum dynamics of the electrons and phonons and yields unbiased results for all electron-phonon interaction strengths and phonon frequencies, but is of particular value in the intermediate-coupling regime, where perturbation theories and other analytical techniques fail.
description: 69 pages, 36 figures, revised version to be published in Polarons in Advanced Materials, Ed. A. S. Alexandrov (Canopus/Springer Publishing, Bristol) (2007)
Detecting and Understanding Branching Frequency Changes in Process Models
Creators: name: Lu, Yang
name: Chen, Qifan
name: Poon, Simon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Business processes are continuously evolving in order to adapt to changes due to various factors. One type of process changes are branching frequency changes, which are related to changes in frequencies between different options when there is an exclusive choice. Existing methods either cannot detect such changes or cannot provide accurate and comprehensive results. In this paper, we propose a method which takes both event logs and process models as input and generates a choice sequence for each exclusive choice in the process model. The method then identifies change points based on the choice sequences. We evaluate our method on a real-life event log. Results show that our method can identify branching frequency changes in process models and provide comprehensive results to users.
Βιολογία και οικολογία πληθυσμών του κορμοράνου(Phalacrocorax Carbo L. 1758) που φωλιάζουν και διαχειμάζουν σε ελληνικούς υγρότοπους
Creators: name: Λιόρδος, Βασίλειος Σ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004

description: Μελετήθηκαν το μέγεθος των πληθυσμών, βιολογία αναπαραγωγής και η δίαιτα και οικολογία διατροφής του κορμοράνου(Phalacrocorax Carbo L.1758). Τα έτη 1999-2003 στις λίμνες Κερκίνη και Μικρή Πρέσπα, τα δέλτα του Εβρου και του Αξιού και τη Λιμνοθάλασσα Μεσολογγίου. Κατά την περίοδο διαχείμασης ο πληθυσμός των κορμοράνων μειώθηκε στη Βόρεια Ελλάδα πιθανώς εξαιτίας δυσμενών καιρικών συνθηκών. Κατά την περίοδο αναπαραγωγής, παρατηρήθηκαν αυξομειώσεις του πληθυσμού στη λίμνη Μικρή Πρέσπα και το Δέλτα του Αξιού και σημαντική αύξηση στη λίμνη Λερκίνη πιθανώς εξαιτίας καλύτερης ποιότητας βιοτόπων. Το μεγαλύτερο μήκος και πλάτος και ο μεγαλύτερος όγκος αβγών, αλλά και η μεγαλύτερη επιτυχία πτέρωσης και συνολική αναπαραγωγική επιτυχία που βρέθηκαν στη λίμνη Κερκίνη δείχνουν ότι πρόκειται για καλύτερης ποιότητας οικοσύστημα. Μεγάλη ποικιλία ψαριώνχαμηλής και μέτριας εμπορικής αξίας συμμετείχαν στη δίαιτα του κορμοράνου. Τα τροφικά του επίπεδα κυμάνθηκαν μεταξύ 3,50 και 4,50 δείχνοντας ότι πρόκειται για κορυφαίο θηρευτή των μεσογειακών υδάτινων οικοσυστημάτων
description: Population size, breeding biology and feeding ecology of the great cormorant(Phalacrocorax Carbo) were studied in greece during 1999-2003. The great cormorant population decreased in Northern Greece in winter due mainly to adverse weather conditions. Breeding pairs fluctuated in 1999-2003 at lake Mikri Prespa and Axios Delta, whereas the lake Kerkini population ingreased greatly, due possibly to better habitat quality. The larger egg size(length, breadth, volume) and greater fledging and overall breeding success observed ar lake Kerkini indicate a breeding habitat of better quality. A large variety of fish species of medium and low economic value was found in the diet of the great cormorant during the wintering and breeding seasons. Fractional trophic levels ranged between 3,50 and 4,50 indicating that the great cormorant is a top predator in the mediterranean aquatic ecosystems
Exact static solutions to a translationally invariant discrete $ϕ^4$ model
Creators: name: Dmitriev, Sergey V.
name: Kevrekidis, Panayotis G.
name: Khare, Avinash
name: Saxena, Avadh
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: For a discrete, translationally-invariant $ϕ^4$ model introduced by Barashenkov {\it et al.} [Phys. Rev. E {\bf 72}, 35602R (2005)], we provide the momentum conservation law and demonstrate how the first integral of the static version of the discrete model can be constructed from a Jacobi elliptic function (JEF) solution. The first integral can be written in the form of a nonlinear map from which {\it any} static solution supported by the model can be constructed. A set of JEF solutions, including the staggered ones, is derived. We also report on the stability analysis for the static bounded solutions and exemplify the dynamical behavior of the unstable solutions. This work provides a road-map, through this illustrative example, on how to fully analyze translationally-invariant models in terms of their static problem, its first integral, their full-set of static solutions and associated conservation laws.
description: submitted for publication
Broad Band Optical Polarimetric Study of IC 1805
Creators: name: Medhi, Biman J.
name: G., Maheswar
name: K., Brijesh
name: Pandey, J. C.
name: Kumar, T. S.
name: Sagar, Ram
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the BVR broad band polarimetric observations of 51 stars belonging to the young open cluster IC 1805. Along with the photometric data from the literature we have modeled and subtracted the foreground dust contribution from the maximum polarization (P_{max}) and colour excess (E_{B-V}). The mean value of the P_max for intracluster medium and the foreground are found to be 5.008 +/-0.005 % and 4.865 +/-0.022 % respectively. Moreover, the mean value of the wavelength of maximum polarization (lambda_{max}) for intracluster medium is 0.541 +/- 0.003 micro m, which is quite similar as the general interstellar medium (ISM). The resulting intracluster dust component is found to have negligible polarization efficiency as compared to interstellar dust. Some of the observed stars in IC 1805 have shown the indication of intrinsic polarization in their measurements.
description: 8 pages, 7 figures, Accepted for publication in MNRAS
Advanced Hough-based method for on-device document localization
Creators: name: Tropin, D. V.
name: Ershov, A. M.
name: Nikolaev, D. P.
name: Arlazarov, V. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The demand for on-device document recognition systems increases in conjunction with the emergence of more strict privacy and security requirements. In such systems, there is no data transfer from the end device to a third-party information processing servers. The response time is vital to the user experience of on-device document recognition. Combined with the unavailability of discrete GPUs, powerful CPUs, or a large RAM capacity on consumer-grade end devices such as smartphones, the time limitations put significant constraints on the computational complexity of the applied algorithms for on-device execution. In this work, we consider document location in an image without prior knowledge of the document content or its internal structure. In accordance with the published works, at least 5 systems offer solutions for on-device document location. All these systems use a location method which can be considered Hough-based. The precision of such systems seems to be lower than that of the state-of-the-art solutions which were not designed to account for the limited computational resources. We propose an advanced Hough-based method. In contrast with other approaches, it accounts for the geometric invariants of the central projection model and combines both edge and color features for document boundary detection. The proposed method allowed for the second best result for SmartDoc dataset in terms of precision, surpassed by U-net like neural network. When evaluated on a more challenging MIDV-500 dataset, the proposed algorithm guaranteed the best precision compared to published methods. Our method retained the applicability to on-device computations.
description: This is a preprint of the article submitted for publication in the journal "Computer Optics"
Κοινωνικές και πολιτιστικές δραστηριότητες πρωτοβουλίας στο χώρο της Θεσσαλονίκης
Creators: name: Τσιούμη, Ζαφειρία (Ρένια) Α.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Χορηγοί
Sponsors

description: Στη διδακτορική διατριβή εξετάζεται το θέμα της χορηγίας στο χώρο της Θεσσαλονίκης από μια σύντομη θεώρηση του θεσμού της χορηγίας από την αρχαιότητα ως τη σύγχρονη εποχή, ακολουθεί η παρουσίαση της νέας μορφής που πήρε η χορηγία στην τελευταία δεκαετία στην Ελλάδα. Η ενεργοποίηση των πολιτών σε κοινωνικά και πολιτιστικά θέματα είχε ως αποτέλεσμα τη δημιουργία πολλών φορέων με προσφορά στο κοινωνικό σύνολο, η λειτουργία των οποίων απαιτεί δαπάνες στις οποίες η Πολιτεία δεν μπορεί να ανταποκριθεί. Οι φορείς στρέφονται αναγκαστικά προς τους χορηγούς. Οι προσπάθειες είναι συχνά ανεπιτυχείς. Στη μελέτη διερευνώνται οι λόγοι για τους οποίους προκύπτουν προβλήματα με βάση συνεντεύξεις προς τις δυο πλευρές και ερμηνευτική προσέγγιση των απόψεων τους και της στρατηγικής τους
description: The subject of the dissertation is thw institution of sponsorship and its function in Thessaloniki. After a brief view of the sponsorship institution from the antiquity till the contemporary time they are researched the problems of the function of both sides, sponsors and organization. Theirs aspects and strategy are examined by the hermeneutic approach. After the results of the examination solutions are proposed for the better cooperations between the interesting sides
Το πρότυπο και η ποιητική του μεσαιωνικού μυθιστορήματος "Διήγησις εξαίρετος Βελθάνδρου του Ρωμαίου"
Creators: name: Χελιδώνη, Στεργιανή Σ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Πύραμος και Θίσβη
Pyramos and Thisbe

description: Στη διατριβή προτείνεται μια νέα ανάγνωση του ελληνικού μεσαιωνικού μυθιστορήματος "Διήγησις εξαίρετος Βελθάνδρου του Ρωμαίου". Η εξέταση της χωροθεσίας της δράσης των ηρώων οδηγεί στην ανακάλυψη του μύθου που αποτελεί το πρότυπο βάσει του οποίου είναι οργανωμένη η ερωτική ιστορία του Βέλθανδρου και της Χρυσάντζας. Επίσης, ο σχολιασμός της ύπαρξης του μύθου στο κείμενο οδηγεί στην αναγνώριση της ποιητικής του κειμένου, τόσο στο επίπεδο του αφηγηματικού περιεχομένου όσο και στο επίπεδο του αφηγηματικού λόγου. Η πραγμάτευση καταλήγει σε μια νέα αποτίμηση του κειμένου ως λογοτεχνικού έργου. Επιπλέον, στο πλαίσιο της εξέτασης των ζητημάτων τα οποία συνιστούν τις απαραίτητες προϋποθέσεις προκειμένου να θεμελιωθεί η νέα πρόταση οργάνωσης του κειμένου προτείνονται 1)μια συνολική πραγμάτευση του Πύραμου και της Θίσβης, που καταλήγει στον προσδιορισμό της ταυτότητάς του, δηλ. στον προσδιορισμό της καταγωγής και στην ερμηνεία του 2)μια νέα, θεμελιωμένη άποψη όσον αφορά την ταυτότητα του Θεού Ερωτα ο οποίος εμφανίζεται στο μεσαιωνικό ελληνικό μυθιστόρημα, λόγιο και δημώδες και 3)μια συνολική περιγραφή του αινίγματος ως λόγου και ένας νέος ορισμός του. Ταυτοχρόνως, αντιμετωπίζονται ερμηνευτικά και εκδοτικά ζητήματα του κειμένουIn the thesis a new approach of the Greek medieval nove "the extraordinary tale of Velthandros the Roman" is proposed. The examination of where the action takes place ends up to discover the myth on which the erotic tale of Velthandros and Chrysantza is based. Furthermore, the analyse of the myth in the text leads to the recognition of the poetics both on the level of narrative discourse and narrative meaning. A close reading of the text leads us to a new evaluation of the text as a literary work. In addition through the examination of the issues that are the necessary conditions for establishing this new approach of the text a few suggestions are made 1) a complete study of the myth pf Pyramos and Thisbe whish resulted in the definition of its identity, i.e. the definition of the origin and the interpretation of the myth 2)a new well-founded view concerning the identity of the god Eros, who appears in the Greek medieval novel, scholorly and popular, and 3)a complete description of the enigma as discourse and a new definition of it. It must be noted that this deals also with interpretative as well as publication issues
Replacing vertical actions by mouse movements: A web-based paradigm for investigating vertical spatial associations
Creators: name: Schütt, Emanuel
name: Mackenzie, Ian G.
name: Kaup, Barbara
name: Dudschig, Carolin
Publisher: name: Zenodo
Year: 2021

description: The folder contains data and code associated with the project "Replacing vertical actions by mouse movements: A web-based paradigm for investigating vertical spatial associations".
The periodic orbit conjecture for steady Euler flows
Creators: name: Cardona, Robert
Publisher: name: arXiv
Year: 2021
Subjects: subject: Dynamical Systems (math.DS)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: The periodic orbit conjecture states that, on closed manifolds, the set of lengths of the orbits of a non-vanishing vector field all whose orbits are closed admits an upper bound. This conjecture is known to be false in general due to a counterexample by Sullivan. However, it is satisfied under the geometric condition of being geodesible. In this work, we use the recent characterization of Eulerisable flows (or more generally flows admitting a strongly adapted one-form) to prove that the conjecture remains true for this larger class of vector fields.
description: 12 pages, overall improvements, new title and new section 4
Electronic Instabilities in Shape-Memory Alloys
Creators: name: Lashley, J. C.
name: Schulze, R. K.
name: Mihaila, B.
name: Hults, W. L.
name: Smith, J. L.
name: Risenborogh, P. S.
name: Opeil, C. P.
name: Fisher, R. A.
name: Svietelskiy, O.
name: Suslov, A.
name: Planes, A.
name: Manosa, L.
name: Finlayson, T. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using a variety of thermodynamic measurements made in magnetic fields, we show evidence that the diffusionless transition (DT) in many shape-memory alloys is related to significant changes in the electronic structure. We investigate three alloys that show the shape-memory effect (In-24 at.% Tl, AuZn, and U-26 at.% Nb). We observe that the DT is significantly altered in these alloys by the application of a magnetic field. Specifically, the DT in InTl-24 at.% shows a decrease in the DT temperature with increasing magnetic field. Further investigations of AuZn were performed using an ultrasonic pulse-echo technique in magnetic fields up to 45 T. Quantum oscillations in the speed of the longitudinal sound waves propagating in the [110] direction indicated a strong acoustic de Haas-van Alphen-type effect and give information about part of the Fermi surface.
description: 5 figures
Ηρωας και πόλη: το παράδειγμα του Ηρακλή στην αρχαϊκή εικονογραφία της Κορίνθου
Creators: name: Αρβανιτάκη, Αννα
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Εικονογραφία
Iconography

description: Η εργασία ασχολείται με την κορινθιακή εικονογραφία του 7ου και 6ου αι. π.χ. και πιο συγκεκριμένα με τις μυθολογικές παραστάσεις όπου πρωταγωνιστεί ο Ηρακλής. Συλλέχθηκαν όλες οι παραστάσεις που φέρουν θέματα αντλημένα από τη ζωή του ήρωα. Η μελέτη του σχετικού υλικού έγινε σε δύο επίπεδα : ένα πρώτο εικονογραφημένο και ένα δεύτερο εικονολογικό. Για την εικονογραφική μελέτη λήφθηκαν υπόψη τρεις κυρίως παράμετροι : η σύγχρονη κορινθιακή τέχνη, η τέχνη άλλων εργαστηρίων και τα σωζόμενα γραπτά κείμενα. Κατά την εικονολογική μελέτη του υλικού εντάχθηκαν οι παραστάσεις μέσα στο γενικότερο πλαίσιο της κοινωνίας που τις φιλοτέχνησε. Σ'αυτό το δεύτερο μέρος τα δύο κύρια ερωτήματα που τέθηκαν αφορούν, πρώτον, την αναγνώριση των βασικών ζητημάτων που πραγματεύονταν οι μύθοι με ήρωα τον Ηρακλή που απαντούν στην κορινθιακή εικονογραφία της αρχαϊκής περιόδου και δεύτερον πως συνδέονταν αυτά τα ζητήματα με την ελληνική πραγματικότητα της αρχαϊκής εποχής και ειδικότερα με την αρχαϊκή κοινωνική, πολιτική και πολιτιστική ζωή της Κορίνθου
description: The corinthian iconography of the 7th and 6th c. B.C. and more specifically the mythological scenes on corinthian vases, in which Heracles is the protagonist, constitute the subject of this thesis. The study was focused mainly on the iconographical examination of these corinthian vase painting and on the attempt to investigate their connections to the social, political and cultural reality of Corinth during the archaic period
Τηλεοπτική διαφήμιση και παιδί προσχολικής ηλικίας στην Ελλάδα
Creators: name: Σεμεντεριάδης, Θεμιστοκλής
Publisher: name: Aristotle University of Thessaloniki
Year: 2004

description: Σκοπός της έρευνας είναι η διερεύνηση της σχέσης παιδικής τηλεοπτικής διαφήμισης-παιδιού προσχολικής ηλικίας. Το δείγμα της έρευνας αποτελείται από 210 παιδικές διαφημίσεις και από 369 παιδιά και τους γονείς τους. Μελετούμε από τη μια πλευρά το περιεχόμενο των διαφημίσεων και από την άλλη τη χρήση τους από τα παιδιά. Οι μέθοδοι που χρησιμοποιούμε είναι η ανάλυση περιεχομένων το ερωτηματολόγιο και η συνέντευξη. Συμπερασματικά διαπιστώσαμε πως η σχέση διαφήμισης παιδιού έχει το χαρακτήρα δυναμικής αλληλεπίδρασης
description: The scope of the research is the investigation of the relation between children tv commercials and the preschoolers. The sample of the research include 210 children commercials and 369 children with their parents. On the one hand, we study the content of the commercial and on the other their usage by the childern. The method we use is content analysis, questionnaires and interview. In conclusion we determined that the relation between commercials and children take the form of dynamic interaction
Local-global principles for representations of quadratic forms
Creators: name: Ellenberg, Jordan
name: Venkatesh, Akshay
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We prove the local-global principle holds for the problem of representations of quadratic forms by quadratic forms, in codimension $\geq 7$. The proof uses the ergodic theory of $p$-adic groups, together with a fairly general observation on the structure of orbits of an arithmetic group acting on integral points of a variety.
description: TeX clash causing O to appear as \emptyset fixed
Yang-Baxter deformations of WZW model on the Heisenberg Lie group
Creators: name: Eghbali, Ali
name: Parvizi, Tayebe
name: Rezaei-Aghdam, Adel
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The Yang-Baxter (YB) deformations of Wess-Zumino-Witten (WZW) model on the Heisenberg Lie group ($H_4$) are examined. We proceed to obtain the nonequivalent solutions of (modified) classical Yang-Baxter equation ((m)CYBE) for the $ h_4$ Lie algebra by using its corresponding automorphism transformation. Then we show that YB deformations of $H_4$ WZW model are split into ten nonequivalent backgrounds including metric and $B$-field such that some of the metrics of these backgrounds can be transformed to the metric of $H_{4}$ WZW model while the antisymmetric $B$-fields are changed. The rest of the deformed metrics have a different isometric group structure than the $H_{4}$ WZW model metric. As an interesting result, it is shown that all new integrable backgrounds of the YB deformed $ H_4$ WZW model are conformally invariant up to two-loop order. In this way, we obtain the general form of the dilaton fields satisfying the vanishing beta-function equations of the corresponding $σ$-models.
description: 24 pages, some references are added
Sociolinguistic survey
Creators: name: UCL
name: Baclawski, Kenneth
name: Sikhara (Đàng Thanh Quốc Thuận)
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: cjm

description: Word list & sentences, brief narrative; located in a cafe with ambient music. Note: no recording #2.
Linkage studies of x-linked cleft palate and ankyloglossia in a British Columbia native kindred
Creators: name: Gorski, Sharon M.
Publisher: name: University of British Columbia
Year: 2008

description: Human craniofacial malformations are a class of common congenital anomalies. Their etiology is heterogeneous and often poorly understood. To elucidate the nature of craniofacial defects at the molecular level, one approach is to study the exceptional examples of malformations which segregate in families as single gene disorders. This study employs such an approach: it is directed toward the isolation of a locus responsible for cleft palate and ankyloglossia which segregate as a single X-linked trait (CPX) in a British Columbia (B.C.) Native kindred. The original description (Lowry 1970) of the clefting defect in the B.C. kindred included submucous cleft palate and bifid or absent uvula. Sixty-three of the B.C. family members were clinically reevaluated and it was observed that some of the affected males and carrier females also present with ankyloglossia (tongue-tie). Ankyloglossia previously has been associated with X-linked cleft palate in an Icelandic kindred in which a locus responsible for cleft palate was provisionally assigned to the Xq21.3-q22 region (Moore et al. 1987; Ivens et al. 1988). This thesis describes linkage analyses in the B.C. kindred which were initiated with DNA markers from the Xq21-q22 region and were later expanded to include markers from the Xq13 region. No recombination was observed between CPX and the DNA markers DXS447 (peak lod score [Zmax ] = 9.38), DXS72 (Zmax = 7.74; Gorski et al. 1992) and DXS326 (Zmax = 2.27). A new polymorphic DNA marker, X850A/L-7, was generated and mapped to the Xq21.1-q21.3 region. X850A/L-7 was found to be partially informative in the B.C. family and also nonrecombinant with respect to CPX (Zmax = 1.91). Recombination was observed between CPX and PGK1 (Zmax = 7.63 at recombination fraction [θ̂̂̂] = 0.03) and between CPX and DXYS1 (Zmax = 5.59 at θ =0.04). These results localize B.C. CPX between PGK1 and DXYS1 in the Xq13.3-q21.31 region.
On the stability of conservative discontinuous Galerkin/Hermite spectral methods for the Vlasov-Poisson system
Creators: name: Bessemoulin-Chatard, Marianne
name: Filbet, Francis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We study a class of spatial discretizations for the Vlasov-Poisson system written as an hyperbolic system using Hermite polynomials. In particular, we focus on spectral methods and discontinuous Galerkin approximations. To obtain L 2 stability properties, we introduce a new L 2 weighted space, with a time dependent weight. For the Hermite spectral form of the Vlasov-Poisson system, we prove conservation of mass, momentum and total energy, as well as global stability for the weighted L 2 norm. These properties are then discussed for several spatial discretizations. Finally, numerical simulations are performed with the proposed DG/Hermite spectral method to highlight its stability and conservation features.
description: arXiv admin note: text overlap with arXiv:2004.02685
An ns-3 Implementation of a Bursty Traffic Framework for Virtual Reality Sources
Creators: name: Lecci, Mattia
name: Zanella, Andrea
name: Zorzi, Michele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: Next-generation wireless communication technologies will allow users to obtain unprecedented performance, paving the way to new and immersive applications. A prominent application requiring high data rates and low communication delay is Virtual Reality (VR), whose presence will become increasingly stronger in the years to come. To the best of our knowledge, we propose the first traffic model for VR applications based on traffic traces acquired from a commercial VR streaming software, allowing the community to further study and improve the technology to manage this type of traffic. This work implements ns-3 applications able to generate and process large bursts of packets, enabling the possibility of analyzing APP-level end-to-end metrics, making the source code as well as the acquired VR traffic traces publicly available and open-source.
description: 9 pages, 6 figures. Please cite it as: M. Lecci, A. Zanella, M. Zorzi, "An ns-3 Implementation of a Bursty Traffic Framework for Virtual Reality Sources," in Workshop on ns-3 (WNS3), Jun. 2021, Virtual Event, US
On Equivalence between Optimality Criteria and Projected Gradient Methods with Application to Topology Optimization Problem
Creators: name: Ananiev, Sergey
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 65K99

description: The paper demonstrates the equivalence between the optimality criteria (OC) method, initially proposed by Bendsoe & Kikuchi for topology optimization problem, and the projected gradient method. The equivalence is shown using Hestenes definition of Lagrange multipliers. Based on this development, an alternative formulation of the Karush-Kuhn-Tucker (KKT) condition is suggested. Such reformulation has some advantages, which will be also discussed in the paper. For verification purposes the modified algorithm is applied to the design of tension-only structures.
description: 12 pages
Διερεύνηση της γενετικής δομής τριών ειδών του γένους Trachurus με τη χρήση DNA δεικτών
Creators: name: Καραϊσκου, Νικολέττα
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Γενετική ταυτοποίηση
Genetic identification

description: Στα ευρωπαϊκά ύδατα συναντιούνται τρία είδη του γένους Trachurus : το T. Trachurus, το Τ.Mediterraneus και το T. Picturatus. Στην παρούσα εργασία αναλύθηκαν δείγματα και των τριών ειδών από 12 δειγματοληπτικές περιοχές. Προσδιορίστηκε η πρωτοταγής δομή του κυτοχρώματος b του MtDNA σε σύνολο 84 δειγμάτων και των τριών ειδών. Προσδιορίστηκαν 22 απλότυποι και ειδο-ειδικές θέσεις που επιτρέπουν την διάκριση των τριών ειδών. Αναπτύχθηκε PCR-RFLP μεθοδολογία για τη διάκριση/ταυτοποίηση των τριών ειδών. Επίσης έγινε ανάλυση SSCP και προσδιορίστηκε η πρωτοταγής δομή σε 40 δείγματα για την περιοχή του 16SrRNA του MtDNA. Εγινε ταυτοποίηση αυγών του γένους Trachurus με ποσοστό επιτυχίας 100% όταν τα αυγά ήταν συντηρημένα σε αιθανόλη. Επίσης, ενισχύθηκε το SsrRNA που φάνηκε ικανό να διακρίνει τα τρία είδη. Τέλος, αναλύθηκε η περιοχή της D-loop του MtDNA και οι πληθυσμιακές αναλύσεις δείχνουν ότι οι ευρωπαϊκοί πληθυσμοί των τριών ειδών να αποτελούν ένα παμμικτικό πληθυσμό και μόνοι οι πληθυσμοί T. Trachurus της Αφρικής να αποτελούν ξεχωριστό υποείδος
description: Three species of the genous Trachurus are present in european waters : T. Trachurus, T. Mediterraneus and T. Picturatus. In the present study, samples of the three species from 12 different areas were analysed. Sequence analysis of cytochrome b of MtDNA was determined for 84 individuals of all the three species. 22 haplotypes and species-specific species were determined which allow the discrimination of the three species PCR-RFLP methodology was developed to indentify the three species. Additionally, SSCP analysis of cytocrome b was used and sequence analysis of 16srRNA was obtained for 40 individuals. Trachurus eggs preserved in ethanol were identified with 100% of sucess. Furthermore, the SsrRNA gene was capable to identify the three species. Finally, RELP analysis of D-loop region revealed no genetic structure of european population while african T. Trachurus populations belong to different suspecies
Ansatzfunktionen auf dem logarithmischen Raum: die Log-FE-Methode [Abstract]
Creators: name: Schröppel, Christian
name: Wackerfuß, Jens
Publisher: name: Universität Kassel
Year: 2015
Subjects: subject: 620
subject: Logarithmus
subject: Finite-Elemente-Methode
subject: Mehrgitterverfahren

description: Abstract eines Vortrages gehalten auf dem "Forschungskolloquium Baustatik-Baupraxis 2015", 15. – 18.09.2015, organisiert durch Prof. Yuri Petryna, TU Berlin.
Nonlocal symmetries of integrable two-field divergent evolutionary systems
Creators: name: Meshkov, A. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Nonlocal symmetries for exactly integrable two-field evolutionary systems of the third order have been computed. Differentiation of the nonlocal symmetries with respect to spatial variable gives a few nonevolutionary systems for each evolutionary system. Zero curvature representations for some new nonevolution systems are presented.
Evaluating Perceived Usefulness and Ease of Use of CMMN and DCR
Creators: name: Jalali, Amin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: 68Mxx

description: Case Management has been gradually evolving to support Knowledge-intensive business process management, which resulted in developing different modeling languages, e.g., Declare, Dynamic Condition Response (DCR), and Case Management Model and Notation (CMMN). A language will die if users do not accept and use it in practice - similar to extinct human languages. Thus, it is important to evaluate how users perceive languages to determine if there is a need for improvement. Although some studies have investigated how the process designers perceived Declare and DCR, there is a lack of research on how they perceive CMMN. Therefore, this study investigates how the process designers perceive the usefulness and ease of use of CMMN and DCR based on the Technology Acceptance Model. DCR is included to enable comparing the study result with previous ones. The study is performed by educating master level students with these languages over eight weeks by giving feedback on their assignments to reduce perceptions biases. The students' perceptions are collected through questionnaires before and after sending feedback on their final practice in the exam. Thus, the result shows how the perception of participants can change by receiving feedback - despite being well trained. The reliability of responses is tested using Cronbach's alpha, and the result indicates that both languages have an acceptable level for both perceived usefulness and ease of use.
Resonant tunneling diode with spin polarized injector
Creators: name: Slobodskyy, A.
name: Gould, C.
name: Slobodskyy, T.
name: Schmidt, G.
name: Molenkamp, L. W.
name: Sanchez, D.
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 investigate the current-voltage characteristics of a II-VI semiconductor resonant-tunneling diode coupled to a diluted magnetic semiconductor injector. As a result of an external magnetic field, a giant Zeeman splitting develops in the injector, which modifies the band structure of the device, strongly affecting the transport properties. We find a large increase in peak amplitude accompanied by a shift of the resonance to higher voltages with increasing fields. We discuss a model which shows that the effect arises from a combination of three-dimensional incident distribution, giant Zeeman spin splitting and broad resonance linewidth.
description: 10 pages, 4 figures
Elementary invariants for centralizers of nilpotent matrices
Creators: name: Brown, Jonathan
name: Brundan, Jonathan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B35

description: We construct an explicit set of algebraically independent generators for the center of the universal enveloping algebra of the centralizer of a nilpotent matrix in the Lie algebra gl_N(C). In particular, this gives a new proof of the freeness of the center, a result first proved by Panyushev, Premet and Yakimova (math.RT/0610049).
description: 12 pages