cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Longitudinal magnetoresistance in Co-doped BaFe2As2 and LiFeAs single crystals: Interplay between spin fluctuations and charge transport in iron-pnictides
Creators: name: Rullier-Albenque, F.
name: Colson, D.
name: Forget, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The longitudinal in-plane magnetoresistance (LMR) has been measured in different Ba(Fe_(1-x)Co_x)2As2 single crystals and in LiFeAs. For all these compounds, we find a negative LMR in the paramagnetic phase whose magnitude increases as H^2. We show that this negative LMR can be readily explained in terms of suppression of the spin fluctuations by the magnetic field. In the Co-doped samples, the absolute value of the LMR coefficient is found to decrease with doping content in the paramagnetic phase. The analysis of its T dependence in an itinerant nearly antiferromagnetic Fermi liquid model evidences that the LMR displays a qualitative change of T variation with increasing Co content. The latter occurs at optimal doping for which the antiferromagnetic ground state is suppressed. The same type of analysis for the negative LMR measured in LiFeAs suggests that this compound is on the verge of magnetism.
description: 6 pages, 6 figures
title: Tourism landscapes in Nauplio: remaking Arvanitia
title: Τοπία τουρισμού στο Ναύπλιο: ανακατασκευάζοντας την Αρβανιτιά
Creators: name: Γιαννακη Κωνσταντινα
name: Μανωλεσακη Χριστινα
Publisher: name: Technical University of Crete
Year: 2019

description: Το Ναύπλιο είναι μία πόλη με ιδιαίτερο πολιτιστικό και ιστορικό ενδιαφέρον και συνεχώς αυξανόμενη τουριστική ανάπτυξη. Πιο συγκεκριμένα η περιοχή της Αρβανιτιάς συνδυάζει τα αποτυπώματα του μακρινού παρελθόντος με τις οχυρώσεις της Ακροναυπλίας, αλλά και το στίγμα του μοντέρνου κινήματος στην Ελλάδα. Το Ξενία του Τριανταφυλλίδη και το τουριστικό περίπτερο με τη παραλιακή διαμόρφωση του Κραντονέλλη, συνέβαλλαν στην άνθιση του τουρισμού την εποχή του ’60, αλλά πλέον στέκουν εγκαταλελειμμένα. Η παρούσα διπλωματική αποσκοπεί στην αξιοποίηση αυτού του κτιριακού δυναμικού, στην αναδιάρθρωση της παραλίας και στην επανένταξή τους σε ένα εναλλακτικό μοντέλο τουρισμού σε συνδυασμό με ένα νέο κτίριο. Προτείνεται η δημιουργία σχολής Καλών Τεχνών στη πλατεία της Αρβανιτιάς με δημόσια χρήση του δώματός της, ως ένας νέος χώρος εκτόνωσης για τη πόλη σε επαφή με τη φύση και τη τέχνη. Το περίπτερο μετατρέπεται σε βιβλιοθήκη, ενώ το Ξενία παραμένει ξενοδοχείο προσαρμοσμένο στις νέες ανάγκες. Η πρόταση αυτή αποσκοπεί στο να δημιουργήσει ένα πόλο έλξης στη περιοχή για τους κατοίκους και τους επισκέπτες και στην ενδυνάμωση ενός δικτύου με πολιτιστικό, αρχιτεκτονικό, ιστορικό και φυσικό ενδιαφέρον.
Decomposition rank of UHF-absorbing C*-algebras
Creators: name: Matui, Hiroki
name: Sato, Yasuhiko
Publisher: name: arXiv
Year: 2013
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L06, 46L35, 46L55

description: Let A be a unital separable simple C*-algebra with a unique tracial state. We prove that if A is nuclear and quasidiagonal, then A tensored with the universal UHF-algebra has decomposition rank at most one. Then it is proved that A is nuclear, quasidiagonal and has strict comparison if and only if A has finite decomposition rank. For such A, we also give a direct proof that A tensored with a UHF-algebra has tracial rank zero. Applying this characterization, we obtain a counter-example to the Powers-Sakai conjecture.
description: 19 pages, a counter example to the Powers-Sakai conjecture added
title: Μελέτη και υλοποίηση πλατφόρμας πειραμάτων λογικής σχεδίασης βασισμένη σε μικροελεγκτή AVR TM και γραφικής εφαρμογής σε JAVA
Creators: name: Κοττίκας Κωνσταντίνος-Γεώργιος
Publisher: name: Technical University of Crete
Year: 2009

description: Μη διαθέσιμο
title: Μελέτη θερμικής συμπεριφοράς κτιρίου με υλοποίηση ισοδύναμου κυκλωματικού μοντέλου στο Matlab/Simulink
Creators: name: Αντιφάκος Σταύρος
Publisher: name: Technical University of Crete
Year: 2009

description: Μη διαθέσιμο
title: Η χρήση του περιβάλλοντος εν "δυνάμει πραγματικότητας" στην διδασκαλία και έρευνα συστημάτων ελέγχου.
Creators: name: Πέτρου Αναστάσιος
Publisher: name: Technical University of Crete
Year: 2009

description: Μη διαθέσιμο
title: FPGA implementation of LISSOM bioalgorithm
title: Υλοποίηση σε αναδιατασσόμενη λογική του αλγορίθμου βιοπληροφορικής LISSOM
Creators: name: Κοντος Νικολαος
Publisher: name: Technical University of Crete
Year: 2017

description: Η ανάπτυξη βιολογικών νευρωνικών μοντέλων αποτελεί ενδιαφέρον των ερευνητών εδώ και πολλά χρόνια. Στόχος είναι η καλύτερη κατανόηση του εγκεφάλου και των λειτουργιών του ώστε να μπορέσει να προσομοιωθεί με αρκετή ακρίβεια. Για αυτό τον λόγο αρκετά βιολογικά νευρωνικά μοντέλα έχουν αναπτυχθεί τα οποία καταφέρνουν να προσομοιώσουν σε μεγάλο βαθμό τον τρόπο επεξεργασίας και διάδοσης της πληροφορίας στα νευρωνικά δίκτυα.
Η συγκεκριμένη διπλωματική εργασία στοχεύει στην μελέτη του βιο-αλγορίθμου LISSOM. Το συγκεκριμένο μοντέλο βασίζεται στην λειτουργία των αυτο-οργανωτικών χαρτών για να προσομοιώσει τις λειτουργίες των νευρώνων και συγκεκριμένα την περιοχή V1 του οπτικού φλοιού. Λόγο του μεγάλου όγκου δεδομένων που χαρακτηρίζει το συγκεκριμένο μοντέλο αποφασίσαμε να χρησιμοποιήσουμε τον υβριδικό υπερ-υπολογιστή της Convey ο οποίος βασίζεται σε αναδιατασσόμενη λογική. Με αυτό τον τρόπο ήταν δυνατό να αποθηκευτούν τα δεδομένα μας στην εξωτερική μνήμη που μας παρέχει το σύστημα με υψηλό εύρος ζώνης των ελεγκτών της. Ταυτόχρονα εποφελούμαστε και από την αναδιατασσόμενη λογική για την ταχύτερη επεξεργασία των δεδομένων μας.
Συγκεκριμένα η σχεδίαση μας μπορεί να προσομοιώσει νευρωνικά δίκτυα μεγέθους μέχρι 192x192 νευρώνων. Το δίκτυο αποτελείται από δυο επίπεδα, την επιφάνεια του αμφιβληστροειδή, που λειτουργεί σαν είσοδος, και την περιοχή V1 και στηρίζεται σε δυο βασικές υποθέσεις: πως οι πλευρικές συνδέσεις είναι κυρίως ανασταλτικές σε μεγάλες αποστάσεις και διεγερτικές στις κοντινές και πως οι πλευρικές και οι εισάγων συνδέσεις προσαρμόζονται από τον ίδιο μηχανισμό Hebbian.
Τέλος τα αποτελέσματα στις πειραματικές μετρήσεις που έγιναν σε μία Virtex-6 LX760 έδειξαν πως η σχεδίαση μας μπορεί να τρέξει 2 φορές γρηγορότερα από μια συμβατική GPU προσομοιώνοντας μάλιστα μεγαλύτερου μεγέθους νευρωνικά δίκτυα και 3 φορές γρηγορότερα από την υλοποίηση στο Software. Όμως δεν καταφέρνει να ξεπεράσει τις επιδόσεις μιας πολύ καλής GPU όπως η GTX980 που χρησιμοποιήθηκε για τις συγκεκριμένες μετρήσεις.
Sensing Quantum Nature of Primordial Gravitational Waves Using Electromagnetic Probes
Creators: name: Arani, F. Shojaei
name: Harouni, M. Bagheri
name: Lamine, B.
name: Blanchard, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: 81V10

description: Based on optical medium analogy, we establish a formalism to describe the interaction between an electromagnetic (EM) system with gravitational waves (GWs) background. After a full discussion on the classical treatment of the EM-GW interaction and finding the EM field mode-functions in the presence of the magneto-dielectric media caused by GWs, the governing quantum interaction Hamiltonian is obtained. Investigation of the optical quadrature variance as well as the visibility of a laser field interacting with the multi-mode squeezed primordial gravitational waves imply that the inflationary primordial gravitational waves (PGWs) act as a decoherence mechanism that destroy EM coherency after a characteristic time scale, $τ_{c}$, which depends on the inflationary parameters $(β,β_s,r)$, or equivalently, the fractional energy density of PGWs, $Ω_{gw,0}$. The decoherency mechanism overcomes the coherent effects, such as revivals of optical squeezing, thus leaving their confirmation out of reach. Influenced by the continuum of the squeezed PGWs, the laser field suffers a line-width broadening by $γ= τ_{\text{c}}^{-1}$. The most peculiar property of the EM spectrum is the apparition of side bands at $ω\sim ω_0\pm 1.39 τ_c^{-1}$Hz, stemming from the squeezed nature of PGWs. The laser phase noise induced by the squeezed PGWs grows with time squarely, $Δϕ=(t/τ_c)^2$, that can most possibly be sensed within a finite flight time.
description: 14 pages, 4 figures
title: Data visualization framework using model driven software development
title: Εφαρμογή οπτικοποίησης δεδομένων με ανάπτυξη μοντελοστρεφούς λογισμικού
Creators: name: Σταθατος Στεφανος
Publisher: name: Technical University of Crete
Year: 2017

description:     The huge growth of Web in the last years has led to the demand for specialized applications, which operate in different devices, are secure and guarantee the constant provision of services to the user, under any circumstances. The model driven software development is a design technique which is based on model utilization and assists in the creation of software, which is extensible, reusable and comprehensible by different stakeholders. It contributes to the development of isolated modules with separated responsibilities.
      Another challenge of our time, is the daily touch with large amounts of complex data, which one must constantly study in order to draw conclusions and make decisions. Due to the way the human brain processes information, using charts or graphs to visualize data is easier than studying spreadsheets or reports.
    In this thesis, we developed a data visualization framework, which follows the principles of model driven programming. The hierarchical data format is utilized for storing complex multidimensional datasets. The framework consists of modules which contain generic code and are configurable
by other modules. The system functionality is expanded, either through the development of a new independent module or via the growth of an existing one. The framework presentation is implemented through the creation of a web application, which operates as a data visualization tool, for networks of users working on the same projects. The framework, as well as the application, are mainly developed in the JavaScript programming language.
Die Culturreste der Ebene zwischen dem Meerthal und dem Legionslager bei Neuss. a. Fundumstände und örtliche Bedeutung
Creators: name: Koenen, Constantin
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 101 (1897): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Die Culturreste der Ebene zwischen dem Meerthal und dem Legionslager bei Neuss. c. Die Töpferstempel der Sels’schen Sammlung
Creators: name: Oxé, August
name: Siebourg, Max
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 101 (1897): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Neue römische Funde vom Niederrhein
Creators: name: Oxé, August
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 102 (1898): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Berichte über die Thätigkeit der Provinzialkommission für die Denkmalpflege in der Rheinprovinz, der Provinzialmuseen zu Bonn und Trier, der rheinischen Altertums- und Geschichtsvereine und über die Vermehrung der städtischen und Vereinssammlungen innerhalb der Rheinprovinz 1897. Vorbemerkung
Creators: name: Clemen, Paul
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 102 (1898): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Surface angular momentum of light beams
Creators: name: Ornigotti, Marco
name: Aiello, Andrea
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Traditionally, the angular momentum of light is calculated for "bullet-like" electromagnetic wave packets, although in actual optical experiments "pencil-like" beams of light are more commonly used. The fact that a wave packet is bounded transversely and longitudinally while a beam has, in principle, an infinite extent along the direction of propagation, renders incomplete the textbook calculation of the spin/orbital separation of the angular momentum of a light beam. In this work we demonstrate that a novel, extra surface part must be added in order to preserve the gauge invariance of the optical angular momentum per unit length. The impact of this extra term is quantified by means of two examples: a Laguerre-Gaussian and a Bessel beam, both circularly polarized.
description: 14 pages, 1 figure
Law of the SLE tip
Creators: name: Butkovsky, Oleg
name: Margarint, Vlad
name: Yuan, Yizheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J67, 30C20, 60H10

description: We analyze the law of the SLE tip at a fixed time in capacity parametrization. We describe it as the stationary law of a suitable diffusion process, and show that it has a density which is a unique solution of a certain PDE. Moreover, we identify the phases in which the even negative moments of the imaginary value are finite. For the negative second and negative fourth moments we provide closed-form expressions.
Analysis of loss correction with the Gottesman-Kitaev-Preskill code
Creators: name: Hastrup, Jacob
name: Andersen, Ulrik L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Gottesman-Kitaev-Preskill (GKP) code is a promising bosonic quantum error-correcting code, encoding logical qubits into a bosonic mode in such a way that many physically relevant noise types can be corrected effectively. A particularly relevant noise channel is the pure loss channel, which the GKP code is known to protect against. In particular, it is commonly pointed out that losses can be corrected by the GKP code by transforming the losses into random Gaussian displacements through a quantum-limited amplification channel. However, implementing such amplification in practice is not ideal and could easily introduce an additional overhead of noise from associated experimental imperfections. Here, we analyse the performance of teleportation-based GKP error correction against loss in the absence of an amplification channel. We show that amplification is not required to perform GKP error correction, and that performing amplification actually worsens the performance for practically relevant parameter regimes.
description: 9 pages, 3 figures
title: Ανάλυση δεδομένων σε ένα πέρασμα στο RapidMiner
title: One-pass data analytics using RapidMiner
Creators: name: Κονταξακης Αντωνιος
Publisher: name: Technical University of Crete
Year: 2017

description: Στις μέρες μας δεδομένα παράγονται συνεχώς σε ασύλληπτους ρυθμούς και όλο
και περισσότερες επιχειρήσεις και οργανισμοί προσπαθούν να χρησιμοποιήσουν
όλα αυτά τα δεδομένα για να πάρουν κρίσιμες αποφάσεις. Η επεξεργασία και
ανάλυση δεδομένων για την λήψη αποφάσεων έχει μετατραπεί από πολυτέλεια σε
ανάγκη. Η διαχείριση δεδομένων απαιτεί την χρήση πολύπλοκων αλγορίθμων τους
οποίους οι περισσότεροι άνθρωποι δεν μπορούν να υλοποιήσουν. Για αυτό έχουν
δημιουργηθεί προγράμματα τα οποία προσφέρουν ένα φιλικό προς τον χρήστη
περιβάλλον για σχεδίαση αυτών περιπλοκών αλγοριθμικών διαδικασιών . Όμως τα
περισσότερα από αυτά είναι υλοποιημένα για να εκτελούν αυτούς τους
αλγόριθμους σε ένα υπολογιστή. Τι γίνεται όμως όταν ο όγκος των δεδομένων είναι
πολύ μεγάλος και απαιτείται μεγαλύτερη υπολογιστική ισχύς. Σε αυτήν την
περίπτωση είναι αναγκαία η χρήση ενός συμπλέγματος από υπολογιστές.
Σε αυτήν την εργασία, επιλέξαμε το RapidMiner, ένα σχεδιαστικό πρόγραμμα για
διαχείριση δεδομένων, ως use-case και το επεκτείναμε ώστε να έχει την
δυνατότητα να εκτελούνται οι διαδικασίες του σε ένα σύμπλεγμα υπολογιστών
που διαχειρίζεται από το Apache Spark.
title: Cloud-based virtual building management system
title: Εικονικό σύστημα διαχείρισης κτιρίων σε περιβάλλον νέφους
Creators: name: Παπαδημητριου Νικολαος
Publisher: name: Technical University of Crete
Year: 2017

description: Η παρούσα διπλωματική εργασία ασχολείται με ένα  σύστημα διαχείρισης κτιρίων σε περιβάλλον νέφους
title: Algorithms for automated multilateral negotiations
title: Αλγόριθμοι για αυτοματοποιημένες πολυμερείς διαπραγματεύσεις
Creators: name: Ξενου Κωνσταντια
Publisher: name: Technical University of Crete
Year: 2017

description: In multi-attribute negotiations, two or more intelligent automated agents sharing common or conflicting interests negotiate over various distinct issues, usually under uncertainty about the characteristics of their negotiating partners. Agents should be able to adaptively adjust their behavior during the negotiation process, by adopting efficient and effective automated negotiation techniques. This is a challenging process, since negotiators are not usually willing to reveal their private information and preferences, so as to avoid being exploited by the other participants during the negotiation.
To overcome these problems and boost agent performance, a modeling of opponents’ preferences and strategy is usually incorporated—with the understanding that uncertainty regarding opponent preferences always exists in real-world settings. Opponent modeling can be usually shown to assist the agent to achieve efficient agreements, and thus to significantly increase the quality of the negotiation outcome.  A multitude of negotiation strategies and opponent models have been coined and studied over the years; regardless, empirically comparing them to each other is not a straightforward exercise.
To this end, the international Autonomous Negotiation Agents Competition (ANAC) was initiated in 2009, and is conducted utilizing a “standard”, purpose-built, negotiation platform (“Genius”). Genius provides a uniform, accepted by all, way of comparing state-of-the-art agent strategies.
In this thesis, we systematically developed several different negotiating strategies, along with ac-companying opponent models. We employed concepts found in the literature, implemented known strategies, and proposed novel ones. This process resulted to the creation of thirteen (13) distinct agents. The developed agents were pitted against previous ANAC participants, and also against each other, with an extensive evaluation being conducted on Genius. One of our strategies was se-lected and participated in the international ANAC-2017 competition. Our thesis presents a detailed evaluation and analysis of the performance of all our agents.
Student of Games: A unified learning algorithm for both perfect and imperfect information games
Creators: name: Schmid, Martin
name: Moravcik, Matej
name: Burch, Neil
name: Kadlec, Rudolf
name: Davidson, Josh
name: Waugh, Kevin
name: Bard, Nolan
name: Timbers, Finbarr
name: Lanctot, Marc
name: Holland, G. Zacharias
name: Davoodi, Elnaz
name: Christianson, Alden
name: Bowling, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computer Science and Game Theory (cs.GT)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Games have a long history as benchmarks for progress in artificial intelligence. Approaches using search and learning produced strong performance across many perfect information games, and approaches using game-theoretic reasoning and learning demonstrated strong performance for specific imperfect information poker variants. We introduce Student of Games, a general-purpose algorithm that unifies previous approaches, combining guided search, self-play learning, and game-theoretic reasoning. Student of Games achieves strong empirical performance in large perfect and imperfect information games -- an important step towards truly general algorithms for arbitrary environments. We prove that Student of Games is sound, converging to perfect play as available computation and approximation capacity increases. Student of Games reaches strong performance in chess and Go, beats the strongest openly available agent in heads-up no-limit Texas hold'em poker, and defeats the state-of-the-art agent in Scotland Yard, an imperfect information game that illustrates the value of guided search, learning, and game-theoretic reasoning.
description: Published in Science Advances
$BKT$ transitions in classical and quantum long-range systems
Creators: name: Giachetti, Guido
name: Trombettoni, Andrea
name: Ruffo, Stefano
name: Defenu, Nicolò
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the past decades considerable efforts have been made in order to understand the critical features of both classical and quantum long-range interacting models. The case of the Berezinskii-Kosterlitz-Thouless (BKT) universality class, as in the $2d$ classical $XY$ model, is considerably complicated by the presence, for short-range interactions, of a line of renormalization group fixed points. In this paper we discuss a field theoretical treatment of the $2d$ $XY$ model with long-range couplings and we compare it with results from the self-consistent harmonic approximation. These methods lead to a rich phase diagram, where both power-law BKT scaling and spontaneous symmetry breaking appear for the same (intermediate) decay rates of long-range interactions. We also discuss the Villain approximation for the $2d$ $XY$ model with power-law couplings, providing hints that, in the long-range regime, it fails to reproduce the correct critical behavior. The obtained results are then applied to the long-range quantum XXZ spin chain at zero temperature. We discuss the relation between the phase diagrams of the two models and we give predictions about the scaling of the order parameter of the quantum chain close to the transition.
description: 15 pages, 3 figures
Patch-based Probabilistic Image Quality Assessment for Face Selection and Improved Video-based Face Recognition
Creators: name: Wong, Yongkang
name: Chen, Shaokang
name: Mau, Sandra
name: Sanderson, Conrad
name: Lovell, Brian C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: I.4.1; I.4.6; I.4.7; I.4.9; I.4.10; I.5.1; I.5.4; G.3

description: In video based face recognition, face images are typically captured over multiple frames in uncontrolled conditions, where head pose, illumination, shadowing, motion blur and focus change over the sequence. Additionally, inaccuracies in face localisation can also introduce scale and alignment variations. Using all face images, including images of poor quality, can actually degrade face recognition performance. While one solution it to use only the "best" subset of images, current face selection techniques are incapable of simultaneously handling all of the abovementioned issues. We propose an efficient patch-based face image quality assessment algorithm which quantifies the similarity of a face image to a probabilistic face model, representing an "ideal" face. Image characteristics that affect recognition are taken into account, including variations in geometric alignment (shift, rotation and scale), sharpness, head pose and cast shadows. Experiments on FERET and PIE datasets show that the proposed algorithm is able to identify images which are simultaneously the most frontal, aligned, sharp and well illuminated. Further experiments on a new video surveillance dataset (termed ChokePoint) show that the proposed method provides better face subsets than existing face selection techniques, leading to significant improvements in recognition accuracy.
title: Σκιαγραφώντας τον ιαπωνικό πολιτισμό. Η υπαινικτική ατμόσφαιρα στην παραδοσιακή αρχιτεκτονική της Ιαπωνίας
title: Studying the Japanese civilization. The allusive atmosphere in traditional Japanese architecture
Creators: name: Οικονομου Ναυσικα
Publisher: name: Technical University of Crete
Year: 2019

description: Η παρούσα εργασία επιδιώκει την ερμηνεία της ατμόσφαιρας της σκιάς στην παραδοσιακή αρχιτεκτονική της Ιαπωνίας, μέσω της διερεύνησης της σχέσης των συμβολισμών που ενυπάρχουν στην ατμόσφαιρα αυτή με την ιαπωνική φιλοσοφία και αισθητική. Αντικείμενο της εργασίας αποτέλεσαν οι βασικές αρχές που διέπουν τον ιαπωνικό πολιτισμό και ιδιαίτερα η επιρροή του Ζεν Βουδισμού στην ιαπωνική κουλτούρα, αλλά και αισθητική, τα ιδεώδη της οποίας αναφέρονται σε μια ομορφιά που αναδεικνύεται στις αποχρώσεις των σκιών. Έννοιες που σχετίζονται με την παροδικότητα, την πρωτόγονη απλότητα, την ατέλεια και την πατίνα του χρόνου αποτελούν θεμελιώδεις αξίες της φιλοσοφίας του ιαπωνικού λαού οι οποίες συνάδουν με την αίσθηση της ασάφειας που αποδίδει το ημίφως, αισθητική που αποτυπώνεται τόσο στην παραδοσιακή αρχιτεκτονική, όσο και μεταγραμμένη σε σύγχρονα αρχιτεκτονικά έργα Ιαπώνων.
Local discrete velocity grids for deterministic rarefied flow simulations
Creators: name: Brull, Stéphane
name: Mieussens, Luc
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Most of numerical methods for deterministic simulations of rarefied gas flows use the discrete velocity (or discrete ordinate) approximation. In this approach, the kinetic equation is approximated with a global velocity grid. The grid must be large and fine enough to capture all the distribution functions, which is very expensive for high speed flows (like in hypersonic aerodynamics). In this article, we propose to use instead different velocity grids that are local in time and space: these grids dynamically adapt to the width of the distribution functions. The advantages and drawbacks of the method are illustrated in several 1D test cases.
description: 2nd revised version, accepted for publication in the JCP
The maximal curves and heat flow in fully affine geometry
Creators: name: Yang, Yun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53A15, 53A55, 53E40, 35K52

description: In Euclidean geometry, the shortest distance between two points is a straight line. Chern made a conjecture in 1977 that an affine maximal graph of a smooth, locally uniformly convex function on two-dimensional Euclidean space $\mathbb{R}^2$ must be a paraboloid. In 2000, Trudinger and Wang completed the proof of this conjecture in affine geometry. (Caution: in these literatures, the term "affine geometry" refers to "equi-affine geometry".) A natural problem arises: Whether the hyperbola is the fully affine maximal curve in $\mathbb{R}^2$? In this paper, by utilizing the evolution equations for curves, we obtain the second variational formula for fully affine extremal curves in $\mathbb{R}^2$, and show the fully affine maximal curves in $\mathbb{R}^2$ are much more abundant and include the explicit curves $y=x^α~\left(α\;\text{is a constant and}\;α\notin\{0,1,\frac{1}{2},2\}\right)$ and $y=x\log x$. At the same time, we generalize the fundamental theory of curves in higher dimensions, equipped with $\text{GA}(n)=\text{GL}(n)\ltimes\mathbb{R}^n$. Moreover, in fully affine plane geometry, an isoperimetric inequality is investigated, and a complete classification of the solitons for fully affine heat flow is provided. We also study the local existence, uniqueness, and long-term behavior of this fully affine heat flow. A closed embedded curve will converge to an ellipse when evolving according to the fully affine heat flow is proved.
description: 47 pages
Bilevel Optimization with a Lower-level Contraction: Optimal Sample Complexity without Warm-start
Creators: name: Grazzi, Riccardo
name: Pontil, Massimiliano
name: Salzo, Saverio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We analyse a general class of bilevel problems, in which the upper-level problem consists in the minimization of a smooth objective function and the lower-level problem is to find the fixed point of a smooth contraction map. This type of problems include instances of meta-learning, equilibrium models, hyperparameter optimization and data poisoning adversarial attacks. Several recent works have proposed algorithms which warm-start the lower-level problem, i.e.~they use the previous lower-level approximate solution as a staring point for the lower-level solver. This warm-start procedure allows one to improve the sample complexity in both the stochastic and deterministic settings, achieving in some cases the order-wise optimal sample complexity. However, there are situations, e.g., meta learning and equilibrium models, in which the warm-start procedure is not well-suited or ineffective. In this work we show that without warm-start, it is still possible to achieve order-wise (near) optimal sample complexity. In particular, we propose a simple method which uses (stochastic) fixed point iterations at the lower-level and projected inexact gradient descent at the upper-level, that reaches an $ε$-stationary point using $O(ε^{-2})$ and $\tilde{O}(ε^{-1})$ samples for the stochastic and the deterministic setting, respectively. Finally, compared to methods using warm-start, our approach yields a simpler analysis that does not need to study the coupled interactions between the upper-level and lower-level iterates.
description: Corrected Remark 18 + other small edits. Code at https://github.com/CSML-IIT-UCL/bioptexps
Trapping massless Dirac particles in a rotating saddle
Creators: name: Nilsson, Johan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study particle motion in rotating saddle-shaped potentials. It is known that such rotating potentials can generate bounded motion for particles with a parabolic dispersion law through the combination of potential, centrifugal and Coriolis forces in the rotating frame. When applied to massless Dirac particles, for example electrons in graphene, such a potential is shown to lead to eigenstates that are spatially localized near the center of the saddle at certain energies. Although other states also exist at these energies, they have non-overlapping support in the oscillator basis, which tend to give the localized states a substantial life-time also when imperfections are present.
description: 4 pages, 3 figures
title: Επαναπροσδιορισμός του δημόσιου χώρου στη συμβολή της οδού Πειραιώς με την Ιερά Οδό
title: Redefining the public space at the junction of Piraeus street and Iera Odos
Creators: name: Αλυσανδρατου Δημητρα
name: Οικονομου Ναυσικα
Publisher: name: Technical University of Crete
Year: 2019

description: Η παρούσα εργασία αφορά στο σχεδιασμό δημόσιου χώρου στο κέντρο της Αθήνας. Πιο συγκεκριμένα η περιοχή βρίσκεται στο σημείο όπου συγκλίνουν η οδός Πειραιώς με την Ιερά Οδό. Πρόκειται για μία περιοχή μεγάλου πολιτιστικού ενδιαφέροντος στην οποία συναντώνται σημεία διαφορετικού χαρακτήρα, όπως ο αρχαιολογικός χώρος του Κεραμεικού, στην απόληξη της οδού Ερμού και η Τεχνόπολις του Δήμου Αθηναίων (Γκάζι) προσελκύοντας μεγάλο αριθμό επισκεπτών. Πρόκειται παράλληλα και για μία ευρύτερη περιοχή κατοικίας στην οποία ενώ παρατηρούνται προσπάθειες εξευγενισμού, ταυτόχρονα είναι και μία περιοχή που συγκεντρώνει ειδικές ομάδες πληθυσμού (μετανάστες, άστεγοι και ουσιοεξαρτώμενα άτομα). Στο συγκεκριμένο σημείο του άξονα της οδού Πειραιώς παρατηρείται η έναρξη διάσπασης του αστικού ιστού και η εμφάνιση μεγάλων ανοιχτών, αδόμητων χώρων  χωρίς χρήση. Όλα τα στοιχεία αυτά διαμορφώνουν έναν  χαρακτήρα πολύπλοκο και ετερογενή. Ως εκ τούτου η εργασία επιχειρεί  επεμβάσεις αστικού χαρακτήρα που αφορούν τον σχεδιασμό των  οικοδομικών τετραγώνων στο σημείο σύγκλισης των οδικών αξόνων που προαναφέρθηκαν. Πιο συγκεκριμένα επιχειρείται ο σχεδιασμός ενός αδόμητου οικοδομικού τετραγώνου και η σύνδεση του με την Τεχνόπολις. Ακόμα γίνεται μια πρόταση επανάχρησης ενός νεοκλασικού διατηρητέου κτηρίου μαζί με τον επανασχεδιασμό του οικοδομικού τετραγώνου στο οποίο βρίσκεται με στόχο τη δημιουργία αλλά και την ενοποίηση κλιμακούμενων δημόσιων χώρων σε μια προσπάθεια αναβάθμισης και ανάδειξης της περιοχής αλλά και της ομαλής συνύπαρξης των παραπάνω στοιχείων.
Energy in the Relativistic Theory of Gravity
Creators: name: Koivisto, Tomi
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: The more precise definition and the more fundamental understanding of the concepts of time, energy, entropy and information are building upon the new, relativistic foundation of gravity. This lecture is an attempt to explain the basic principles that underpin this progress, by focusing on the simple but subtle universal definition of energy. The principles are unearthed from Einstein's theory and Noether's theorems, beneath a century of misconceptions.
description: 7 pages; contribution to the Special Issue of the International Journal of Geometric Methods in Modern Physics dedicated to the conference Geometric Foundations of Gravity in Tartu 2021
Coupling between annual and ENSO timescales in the malaria-climate association in Colombia
Creators: name: Poveda, Germán
name: Rojas, William
name: Quiñones, Martha L.
name: Vélez, Iván D.
name: Mantilla, R. I.
name: Ruiz Carrascal, Carlos Daniel
name: Zuluaga, Juan S.
name: Rúa, Guillermo L.
Publisher: name: Columbia University
Year: 2001
Subjects: Malaria
Malaria--Environmental aspects
Malaria--Epidemiology
Climatic changes
Plasmodium falciparum
Plasmodium vivax

description: We present evidence that the El Niño phenomenon intensifies the annual cycle of malaria cases for Plasmodium vivax and Plasmodium falciparum in endemic areas of Colombia as a consequence of concomitant anomalies in the normal annual cycle of temperature and precipitation. We used simultaneous analyses of both variables at both timescales, as well as correlation and power spectral analyses of detailed spatial (municipal) and temporal (monthly) records. During "normal years," endemic malaria in rural Colombia exhibits a clear-cut "normal" annual cycle, which is tightly associated with prevalent climatic conditions, mainly mean temperature, precipitation, dew point, and river discharges. During historical El Niño events (interannual time scale), the timing of malaria outbreaks does not change from the annual cycle, but the number of cases intensifies. Such anomalies are associated with a consistent pattern of hydrological and climatic anomalies: increase in mean temperature, decrease in precipitation, increase in dew point, and decrease in river discharges, all of which favor malaria transmission. Such coupling explains why the effect appears stronger and more persistent during the second half of El Niño's year (0), and during the first half of the year (+1). We illustrate this finding with data for diverse localities in Buenaventura (on the Pacific coast) and Caucasia (along the Cauca river floodplain), but conclusions have been found valid for multiple localities throughout endemic regions of Colombia. The identified coupling between annual and interannual timescales in the climate-malaria system shed new light toward understanding the exact linkages between environmental, entomological, and epidemiological factors conductive to malaria outbreaks, and also imposes the coupling of those timescales in public health intervention programs.
การศึกษาระบบการบริหารผลการดำเนินงานขององค์กรรัฐวิสาหกิจ ตามแนวทาง Balanced Scorecards
Creators: name: ปาริชาติ มณีมัย
name: สุธิภรณ์ ตรึกตรอง
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2021
Subjects: ระบบการบริหารผลการดําเนินงาน
Balanced Scorecards
รัฐวิสาหกิจ

description: วารสารบริหารธุรกิจ JBA, 44, 170 (เม.ย.-มิ.ย. 64), 1
Implementation of Malaria Dynamic Models in Municipality Level Early Warning Systems in Colombia. Part I: Description of Study Sites
Creators: name: Ruiz Carrascal, Carlos Daniel
name: Cerón, Viviana
name: Molina, Adriana M.
name: Quiñones, Martha L.
name: Jiménez, Mónica M.
name: Ahumada, Martha
name: Gutiérrez, Patricia
name: Osorio, Salua
name: Mantilla, Gilma
name: Connor, Stephen J.
name: Thomson, Madeleine C.
Publisher: name: Columbia University
Year: 2014
Subjects: Malaria
Malaria--Prevention
Malaria--Epidemiology
Long-range weather forecasting

description: As part of the Integrated National Adaptation Pilot project and the Integrated Surveillance and Control System, the Colombian National Institute of Health is working on the design and implementation of a Malaria Early Warning System framework, supported by seasonal climate forecasting capabilities, weather and environmental monitoring, and malaria statistical and dynamic models. In this report, we provide an overview of the local ecoepidemiologic settings where four malaria process-based mathematical models are currently being implemented at a municipal level. The description includes general characteristics, malaria situation (predominant type of infection, malaria-positive cases data, malaria incidence, and seasonality), entomologic conditions (primary and secondary vectors, mosquito densities, and feeding frequencies), climatic conditions (climatology and long-term trends), key drivers of epidemic outbreaks, and non-climatic factors (populations at risk, control campaigns, and socioeconomic conditions). Selected pilot sites exhibit different ecoepidemiologic settings that must be taken into account in the development of the integrated surveillance and control system.
[Der Altsprachliche Unterricht, Heft 6/98 / Der Altsprachliche Unterricht. Latein und Griechisch, Heft 1/99]
Creators: name: Schulz, Hartmut
Publisher: name: Forum Classicum
Year: 2017

description: -
description: Forum Classicum, Nr. 1 (1999): Forum Classicum
Catull, An Lesbia. Ein Liebesdichter mit europäischer Ausstrahlung, bearbeitet von Friedrich Maier
Creators: name: Baader-Schnapper, Ursula
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Catull, An Lesbia. Ein Liebesdichter mit europäischer Ausstrahlung, bearbeitet von Friedrich Maier (Antike und Gegenwart. Lateinische Texte zur Erschließung europäischer Kultur) Bamberg (Buchner) 1998.
description: Forum Classicum, Nr. 1 (1999): Forum Classicum
Laboratory estimation of the effects of increasing temperatures on the duration of gonotrophic cycle of Anopheles albimanus (Diptera: Culicidae)
Creators: name: Rúa, Guillermo L.
name: Quiñones, Martha L.
name: Vélez, Iván D.
name: Zuluaga, Juan S.
name: Rojas, William
name: Poveda, Germán
name: Ruiz Carrascal, Carlos Daniel
Publisher: name: Columbia University
Year: 2005
Subjects: Malaria
Malaria--Environmental aspects
Climatic changes
Anopheles
Mosquitoes as carriers of disease

description: The increase of malaria transmission in the Pacific Coast of Colombia during the occurrence of El Niño warm event has been found not to be linked to increases in the density of the vector Anopheles albimanus, but to other temperature-sensitive variables such as longevity, duration of the gonotrophic cycle or the sporogonic period of Plasmodium. The present study estimated the effects of temperature on duration of the gonotrophic cycle and on maturation of the ovaries of An. albimanus. Blood fed adult mosquitoes were exposed to temperatures of 24, 27, and 30 degrees C, held individually in oviposition cages and assessed at 12 h intervals. At 24, 27, and 30 degrees C the mean development time of the oocytes was 91.2 h (95% C.I.: 86.5-96), 66.2 h (61.5-70.8), and 73.1 h (64-82.3), respectively. The mean duration of the gonotrophic cycle for these three temperatures was 88.4 h (81.88-94.9), 75 h (71.4-78.7), and 69.1 h (64.6-73.6) respectively. These findings indicate that both parameters in An. albimanus are reduced when temperatures rose from 24 to 30 degrees C, in a nonlinear manner. According to these results the increase in malaria transmission during El Niño in Colombia could be associated with a shortening of the gonotrophic cycle in malaria vectors, which could enhance the frequency of man-vector contact, affecting the incidence of the disease.
โครงสร้างตลาดและมาตรการพัฒนาธุรกิจกองทุนรวมในประเทศไทย จากอดีตสู่ยุคหลัง Covid-19
Creators: name: อัญชดา เจริญรุกข์
name: พันทิศา ภาวบุตร
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2021
Subjects: นโยบายการออม
ธุรกิจกองทุนรวม
กฏเกณฑ์และมาตรการเกี่ยวกับบริษัทจัดการกองทุนรวม

description: วารสารบริหารธุรกิจ JBA, 44, 170 (เม.ย.-มิ.ย. 64), 18
Alain Martin / Oliver Primavesi: L ’Empedocle de Strasbourg. Introduction, edition et commentaire (with an English summary)
Creators: name: Munding, Heinz
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Alain Martin / Oliver Primavesi: L ’Empedocle de Strasbourg. Introduction, edition et commentaire (with an English summary). Berlin-New York: de Gruyter 1999, 336 S. DM 78,- (ISBN 3-11- 015129-4).
description: Forum Classicum, Nr. 3 (1999): Forum Classicum
Fractal nature of high-order time crystal phases
Creators: name: Giachetti, Guido
name: Solfanelli, Andrea
name: Correale, Lorenzo
name: Defenu, Nicolò
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Discrete Floquet time crystals (DFTC) are characterized by the spontaneous breaking of the discrete time-translational invariance characteristic of Floquet driven systems. In analogy with equilibrium critical points, also time-crystalline phases display critical behaviour of different order, i.e., oscillations whose period is a multiple $p > 2$ of the Floquet driving period. Here, we introduce a new, experimentally-accessible, order parameter which is able to unambiguously detect crystalline phases regardless of the value of $p$ and, at the same time, is a useful tool for chaos diagnostic. This new paradigm allows us to investigate the phase diagram of the long-range (LR) kicked Ising model to an unprecedented depth, unveiling a rich landscape characterized by self-similar fractal boundaries. Our theoretical picture describes the emergence of DFTCs phase both as a function of the strength and period of the Floquet drive, capturing the emergent $\mathbb{Z}_p$ symmetry in the Floquet-Bloch waves.
Traversability, Reconfiguration, and Reachability in the Gadget Framework
Creators: name: Ani, Hayashi
name: Demaine, Erik
name: Diomidova, Jenny
name: Hendrickson, Dylan
name: Lynch, Jayson
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: Consider an agent traversing a graph of "gadgets", each with local state that changes with each traversal by the agent. We characterize the complexity of universal traversal, where the goal is to traverse every gadget at least once, for DAG gadgets, one-state gadgets, and reversible deterministic gadgets. We also study the complexity of reconfiguration, where the goal is to bring the system of gadgets to a specified state, proving many cases PSPACE-complete, and showing in some cases that reconfiguration can be strictly harder than reachability (where the goal is for the agent to reach a specified location), while in other cases, reachability is strictly harder than reconfiguration.
description: Full version of article appearing in WALCOM 2022. 23 pages, 14 figures
title: Πειραματική αξιολόγηση απόδοσης μερικώς αναδιατασσόμενου συστήματος για εφαρμογές αντοχής σε σφάλματα
Creators: name: Ανάργυρος Ηλίας
Publisher: name: Technical University of Crete
Year: 2009

description: Μη διαθέσιμο
Wiesehöfer, Josef: Das frühe Persien. Geschichte eines antiken Weltreiches
Creators: name: Wölke, Hansjörg
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Wiesehöfer, Josef: Das frühe Persien. Geschichte eines antiken Weltreiches. München: Beck 1998. 128 S., 14,80 DM (Beck Wissen in der Beck ’schen Reihe. 2107; ISBN3-406-43307-3).
description: Forum Classicum, Nr. 3 (1999): Forum Classicum
Generalized Schur-Weyl dualities for quantum affine symmetric pairs and orientifold KLR algebras
Creators: name: Appel, Andrea
name: Przezdziecki, Tomasz
Publisher: name: arXiv
Year: 2022
Subjects: subject: Representation Theory (math.RT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 81R50, 17B37, 16T25

description: Let $\mathfrak{g}$ be a complex simple Lie algebra and $U_qL\mathfrak{g}$ the corresponding quantum affine algebra. We construct a functor ${}^θ{\sf F}$ between finite-dimensional modules over a quantum symmetric pair of affine type $U_q\mathfrak{k}\subset U_qL{\mathfrak{g}}$ and an orientifold KLR algebra arising from a framed quiver with a contravariant involution, providing a boundary analogue of Kang-Kashiwara-Kim-Oh generalized Schur-Weyl duality. With respect to their construction, our combinatorial model is further enriched with the poles of a trigonometric K-matrix intertwining the action of $U_q\mathfrak{k}$ on finite-dimensional $U_qL{\mathfrak{g}}$-modules. By construction, ${}^θ{\sf F}$ is naturally compatible with the Kang-Kashiwara-Kim-Oh functor in that, while the latter is a functor of monoidal categories, ${}^θ{\sf F}$ is a functor of module categories. Relying on a suitable isomorphism à la Brundan-Kleshchev-Rouquier, we prove that ${}^θ{\sf F}$ recovers the Schur-Weyl dualities due to Fan-Lai-Li-Luo-Wang-Watanabe in quasi-split type $\sf AIII$.
description: Final version. Substantial revision: new examples of enhanced J-quivers of Dynkin type have been added in Section 6; the material of the former Sections 6,7, and 11 from v2 has been removed and it will be included in a separate paper. 50 pages
Liquid-activated quantum emission from pristine hexagonal boron nitride for nanofluidic sensing
Creators: name: Ronceray, Nathan
name: You, Yi
name: Glushkov, Evgenii
name: Lihter, Martina
name: Rehl, Benjamin
name: Chen, Tzu-Heng
name: Nam, Gwang-Hyeon
name: Borza, Fanny
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Roke, Sylvie
name: Keerthi, Ashok
name: Comtet, Jean
name: Radha, Boya
name: Radenovic, Aleksandra
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Liquids confined down to the atomic scale can show radically new properties. However, only indirect and ensemble measurements operate in such extreme confinement, calling for novel optical approaches enabling direct imaging at the molecular level. Here, we harness fluorescence originating from single-photon emitters at the surface of hexagonal boron nitride (hBN) for molecular imaging and sensing in nanometrically confined liquids. The emission originates from the chemisorption of organic solvent molecules onto native surface defects, revealing single-molecule dynamics at the interface through spatially correlated activation of neighboring defects. Emitter spectra further offer a direct readout of local dielectric properties, unveiling increasing dielectric order under nanometer-scale confinement. Liquid-activated native hBN defects bridge the gap between solid-state nanophotonics and nanofluidics, opening new avenues for nanoscale sensing and optofluidics.
description: Supplementary data available on Zenodo