cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Η επίδραση της εμφάνισης των νωπών βιολογικών προϊόντων στην αποδοχή τους από τους καταναλωτές
Creators: name: Χρηστάνας, Γεώργιος Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Δειγματοληπτική έρευνα
Εμφάνιση
Προθυμία Πληρωμής
Sampling research
Appearance
Willingness To Pay

description: Συχνά, η εμφάνιση της βιολογικής παραγωγής δεν είναι τόσο καλή, λόγω των περιορισμένων μεθόδων αποφυγής ασθενειών των φυτών. Κύριος σκοπός διεξαγωγής της έρευνας αποτέλεσε ο προσδιορισμός των παραγόντων εκείνων οι οποίοι επηρεάζουν τις διαθέσεις, αντιλήψεις και προτιμήσεις των Ελλήνων καταναλωτών σε ότι αφορά τα βιολογικά νωπά φρούτα και λαχανικά. Για την επίτευξη του αντικειμενικού αυτού σκοπού, διενεργήθηκε έρευνα σε δείγμα του νομού Θεσσαλονίκης, όπου με τη χρήση δομημένου ερωτηματολογίου και μέσω προσωπικής συνέντευξης, συλλέχθηκαν 300 ερωτηματολόγια. Η διατριβή βασίστηκε σε πρωτογενή στοιχεία και υλοποιήθηκε με την ποσοτική έρευνα, η οποία πραγματοποιήθηκε με τη συλλογή ερωτηματολογίων. Το χρονικό διάστημα διεξαγωγής της έρευνας ήταν από τον Ιανουάριο έως το Μάρτιο του 2014. Για τη διερεύνηση της προθυμίας πληρωμής για τα βιολογικά νωπά φρούτα και λαχανικά με αρκετές κηλίδες στην εμφάνιση χρησιμοποιείται το μοντέλο probit. Σύμφωνα με τα αποτελέσματα της έρευνας, το μεγαλύτερο μέρος των καταναλωτών αξιολογεί θετικά τα βιολογικά νωπά φρούτα και λαχανικά, ενώ τα διαχωρίζει για την θρεπτική τους αξία και για την μεγαλύτερη ασφάλειά τους συγκριτικά με τα συμβατικά, σε ότι αφορά τις επιπτώσεις τους στη ανθρώπινη υγεία. Οι κύριοι παράγοντες τέλος, οι οποίοι φάνηκε να επηρεάζουν τις αγοραστικές τους συνήθειες και τις μελλοντικές τους προθέσεις σε ότι αφορά την επιλογή των βιολογικών προϊόντων, είναι μεταξύ άλλων η τιμή τους, η ποιότητα τους και τα συστατικά τους.
description: The appearance of organic produce is often less than perfect because of limited methods of avoiding plant diseases. The main purpose of the survey was to identify the factors that influence those moods, perceptions and preferences of Greek consumers concerning organic fresh fruits and vegetables. To achieve this objective purpose survey was conducted on a sample of Thessaloniki, using a structured questionnaire and through personal interviews, 300 questionnaires were collected. The study was based on primary data and implemented with the quantitative survey, conducted by collecting questionnaires. The sample research obtained between January and March 2014. For the investigation of willingness to pay for spotted organic fresh fruits and vegetables, it is used the probit model. According to the survey results, the majority of consumer appreciates organic fresh fruits and vegetables, while separating them for their nutritional value and greater safety than conventional, as regards their impact on human health. Finally, the main factors, which seemed to affect consumers’ purchasing habits and their future intentions regarding the selection of organic products, include their price, their quality and their components.
Η λύση της εμπορικής μίσθωσης:
Creators: name: Κοκκινίδης, Σοφοκλής Ανέστη
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Λύση
Μίσθωση
Καταγγελία
Termination
Lease
Complaint

description: Σκοπός της διατριβής ήταν η μελέτη του ιδιαίτερα ενδιαφέροντος στη θεωρία και τη νομολογία ζητήματος της λύσης της εμπορικής μίσθωσης. Εξετάσαμε την έννοια και τα βασικά χαρακτηριστικά της εμπορικής μίσθωσης, το νομοθετικό πλαίσιο από το οποίο διέπεται. Αναφερθήκαμε στους λόγους λύσης της εμπορικής μίσθωσης χωρίς την προηγούμενη άσκηση καταγγελίας. Περιγράψαμε τη νομική φύση της καταγγελίας της εμπορικής μίσθωσης. Αναλύσαμε λεπτομερώς τους λόγους καταγγελίας της εμπορικής μίσθωσης, που προβλέπονται τόσο στον Αστικό Κώδικα, όσο και στο π.δ. 34/1995, και τους διαχωρίσαμε με βάση το δικαιούχο της κάθε καταγγελίας, εκμισθωτή, μισθωτή ή και τα δύο συμβαλλόμενα μέρη.
description: The aim of the present thesis was a study of particular interesting in the theory and in case law issue of termination of commercial lease. We examined at the concept and basic characteristics of commercial lease, the legislative framework by which it is governed. We referred to the reasons for the termination of the commercial lease without any recourse to complaint. We described the legal nature of the complaint of commercial lease. We analyzed in detail the reasons of complaint of commercial lease, laid down both in the Civil Code and the Decree 34/1995 and separated them based on the beneficiary of every complaint, lessor, lessee or both contacting parties.
Three related topics on the periodic tables of elements
Creators: name: Maeno, Yoshiteru
name: Hagino, Kouichi
name: Ishiguro, Takehiko
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A large variety of periodic tables of the chemical elements have been proposed. It was Mendeleev who proposed a periodic table based on the extensive periodic law and predicted a number of unknown elements at that time. The periodic table currently used worldwide is of a long form pioneered by Werner in 1905. As the first topic, we describe the work of Pfeiffer (1920), who refined Werner's work and rearranged the rare-earth elements in a separate table below the main table for convenience. Today's widely used periodic table essentially inherits Pfeiffer's arrangements. Although long-form tables more precisely represent electron orbitals around a nucleus, they lose some of the features of Mendeleev's short-form table to express similarities of chemical properties of elements when forming compounds. As the second topic, we compare various three-dimensional helical periodic tables that resolve some of the shortcomings of the long-form periodic tables in this respect. In particular, we explain how the 3D periodic table "Elementouch" (Maeno 2001), which combines the s- and p-blocks into one tube, can recover features of Mendeleev's periodic law. Finally we introduce a topic on the recently proposed nuclear periodic table based on the proton magic numbers (Hagino and Maeno 2020). Here, the nuclear shell structure leads to a new arrangement of the elements with the proton magic-number nuclei treated like noble-gas atoms. We show that the resulting alignments of the elements in both the atomic and nuclear periodic tables are common over about two thirds of the tables because of a fortuitous coincidence in their magic numbers.
description: 14 pages. To appear in Foundations of Chemistry
André Gide en Italie, une étude de la réception critique et de la traduction des Faux-Monnayeurs.
Creators: name: Bianchini, MIchele Μπιανκίνι ΜΙκέλε Φερνάντο
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Aντρέ Ζιντ
Πρόσληψη
Μετάφραση
André Gide
Reception
Translation

description: Ο σκοπός της παρούσας εργασίας είναι η μελέτη της πρόσληψης στην Ιταλία και της μετάφρασης στην ομώνυμη γλώσσα του μυθιστορήματος οι Κυβδυλοποιοί του γάλλου συγγραφέα Αντρέ Ζιντ. Προκειμένου να κατανοήσουμε την αντίδραση των ιταλικών κριτικών αλλά και τους ορίζοντες των προσδοκιών ως προς το εν λόγω μυθιστόρημα, σκιαγραφήσαμε το μεθοδολογικό πλαίσιο στο οποίο βασίζεται το έργο μας και κάναμε μια γενική επισκόπηση του βιβλίου. Εν συνεχεία, αναλύσαμε την θέση του έργου του Ζιντ μεταξύ των δεκαετιών του '20 και του '40, εστιάζοντας ιδιαίτερα σε κάποιες από τις σημαντικότερες κριτικές, όπως αυτή του 1926, έτος δημοσίευσής του στη Γαλλία και του 1947, έτος δημοσίευσης της μετάφρασης στην Ιταλία. Τέλος, αναλύσαμε τη μετάφραση με στόχο την κατανόηση της θέσης του μεταφραστή ως προς τον κείμενο-πηγή, ακολουθώντας μια προοπτική της μεταφραστικής κριτικής.
description: The aim of the present thesis was the study of the reception and the translation of in Italy of the novel of the French writer André Gide: The Counterfeiters. In order to understand the reaction of the Italian critics and the horizons of expectation towards the novel, we outlined the methodological frame we based our work on, and we gave a general overview of the book. Then we analysed the presence of Gide’s work between the 20s and the 40s, focusing particularly on the critical reviews on The Counterfeiters in 1926, year of the publication in France and in 1947, year of the publication of the translation in Italy. Finally we analysed the translation with the aim of understanding the position of the translator towards the source-text, following a perspective of translation criticism.
description: Ce travail porte sur la réception en Italie et la traduction du roman d’André Gide Les Faux-Monnayeurs. Pour comprendre les réactions de la critique italienne ainsi que l’horizon d’attente à l’égard du roman, nous avons tout d’abord cerné les lignes méthodologiques sur lesquelles baser notre étude, tout en présentant les traits généraux du livre étudié. En suite nous avons analysé la pénétration de l’œuvre de Gide en Italie entre les années vingt et les années quarante, avec une particulière attention aux interventions critiques qui traitaient des Faux-Monnayeurs en 1926, moment de sa publication en France et en 1947, moment de la publication de la traduction en Italie. Enfin on a analysé la traduction pour comprendre quelle était la position du traducteur à l’égard du texte-source, selon une perspective de critique de la traduction.
description: Συνεργαζόμενα Τμήματα Γαλλικής Γλώσσας και Φιλολογίας Πανεπιστήμιο Alma Mater Μπολόνιας (Ιταλία) Πανεπιστήμιο Haute-Alsace Μυλούζ (Γαλλία) Πανεπιστήμιο Marc-Bloch Στρασβούργου (Γαλλία) Πανεπιστήμιο Chekir Anta Diop de Dakar (Σενεγάλη)
ОСОБЕННОСТИ ГОСУДАРСТВЕННОЙ КАДАСТРОВОЙ ОЦЕНКИ И СИСТЕМЫ НАЛОГООБЛОЖЕНИЯ В СЕВАСТОПОЛЕ
Creators: name: ФАЙЗУЛЛИН С.Ф.
name: МЕЛЬДЕБЕКОВ ИСКАНДЕР БУЛАТОВИЧ
name: ИВАНОВА А.А.
Publisher: name: Имущественные отношения в Российской Федерации
Year: 2019
Subjects: ГОСУДАРСТВЕННАЯ КАДАСТРОВАЯ ОЦЕНКА В СЕВАСТОПОЛЕ
НОРМАТИВНАЯ СТОИМОСТЬ ЗЕМЛИ В СЕВАСТОПОЛЕ
ПЕРЕРЕГИСТРАЦИЯ ЗЕМЛИ
ВИДЫ РАЗРЕШЕННОГО ИСПОЛЬЗОВАНИЯ В УКРАИНЕ
ПЛАТА ЗА СЕРВИТУТ ОБЪЕКТОВ
STATE CADASTRAL VALUATION IN SEVASTOPOL
THE NORMATIVE VALUE OF LAND IN SEVASTOPOL
RE-REGISTRATION OF LAND
TYPES OF PERMITTED USE IN UKRAINE
FEE FOR SERVITUDE OF OBJECTS

description: В статье выявлены основные проблемы и особенности, с которыми сталкиваются исполнители работ по государственной кадастровой оценке в городе Севастополе в связи со сменой правового поля и изменениями норм законодательства о государственной кадастровой оценке. Проанализирована действующая в этом субъекте система налогообложения и даны предложения по ее улучшению.
Lattice Gauge Theory Approach to Spontaneous Symmetry Breaking from an Extra Dimension
Creators: name: Irges, N.
name: Knechtli, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present lattice simulation results corresponding to an SU(2) pure gauge theory defined on the orbifold space E_4 x I_1, where E_4 is the four-dimensional Euclidean space and I_1 is an interval, with the gauge symmetry broken to a U(1) subgroup at the two ends of the interval by appropriate boundary conditions. We demonstrate that the U(1) gauge boson acquires a mass from a Higgs mechanism. The mechanism is driven by two of the extra-dimensional components of the five-dimensional gauge field which play respectively the role of the longitudinal component of the gauge boson and a massive real physical scalar, the Higgs particle. Despite the non-renormalizable nature of the theory, we observe only a mild cut-off dependence of the physical observables. We also show evidence that there is a region in the parameter space where the system behaves in a way consistent with dimensional reduction.
description: 37 pages, 10 figures; references added; accepted for publication in Nucl. Phys. B
Coupled dynamics of electrons and phonons in metallic nanotubes: current saturation from hot phonons generation
Creators: name: Lazzeri, Michele
name: Mauri, Francesco
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We show that the self-consistent dynamics of both phonons and electrons is the necessary ingredient for the reliable description of the hot phonons generation during electron transport in metallic single-wall carbon nanotubes (SWNTs). We solve the coupled Boltzmann transport equations to determine in a consistent way the current vs. voltage (IV) curve and the phonon occupation in metallic SWNTs which are lying on a substrate. We find a good agreement with measured IV curves and we determine an optical phonon occupation which corresponds to an effective temperature of several thousands K (hot phonons), for the voltages typically used in experiments. We show that the high-bias resistivity strongly depends on the optical phonon thermalization time. This implies that a drastic improvement of metallic nanotubes performances can be achieved by increasing the coupling of the optical phonons with a thermalization source.
description: 6 pages, 5 figures
Cosmological dynamics of Scalar--Tensor Gravity
Creators: name: Carloni, S
name: Leach, J A
name: Capozziello, S
name: Dunsby, P K S
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the phase--space of FLRW models derived from Scalar--Tensor Gravity where the non--minimal coupling is $F(ϕ)=ξϕ^2$ and the effective potential is $V(ϕ)=λϕ^n$. Our analysis allows to unfold many feature of the cosmology of this class of theories. For example, the evolution mechanism towards states indistinguishable from GR is recovered and proved to depend critically on the form of the potential $V(ϕ)$. Also, transient almost--Friedmann phases evolving towards accelerated expansion and unstable inflationary phases evolving towards stable ones are found. Some of our results are shown to hold also for the String-Dilaton action.
description: 25 pages, 4 figures, 12 tables, submitted to CQG
Response to the Letter to the Editor
Creators: name: Spiegelman, Clifford
name: Sheather, S. J.
name: Tobin, W. A.
name: James, W. D.
name: Wexler, S.
name: Roundhill, D. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: This paper has attracted interest around the world from the media (both TV and newspapers). In addition, we have received letters, emails and telephone calls. One of our favorites was a voicemail message asking us to return a call to Australia at which point we would learn who really killed JFK. We welcome the opportunity to respond to the letter to the editor from Mr. Fiorentino. Mr. Fiorentino claims that our ``statement relating to the likelihood of a second assassin based on the premise of three or more separate bullets is demonstrably false.'' In response we would like to simply quote from page 327 of Gerald Posner's book Case Closed, one of the most well known works supporting the single assassin theory: ``If Connally was hit by another bullet, it had to be fired from a second shooter, since the Warren Commission's own reconstructions showed that Oswald could not have operated the bolt and refired in 1.4 seconds.'' Mr. Fiorentino also claims that the ``second fatal flaw is the use of a rather uncomplicated formula based on Bayes Theorem.'' Let $E$ denote the evidence and $T$ denote the theory that there were just two bullets (and hence a single shooter). We used Bayes Theorem to hypothetically calculate $P(T|E)$ from $P(E|T)$ and the prior probability $P(T)$. In order to make $P(T|E)$ ten times more likely than $P(\bar{T}|E)$, the ratio of the prior probabilities [i.e., $P(T) / P(\bar{T})$] would have to be greater than 15. Thus, we again conclude that this casts serious doubt on Dr. Guinn's conclusion that the evidence supported just two bullets. Sadly, this is far from the first time that probability has been misunderstood and/or misapplied in a case of public interest. A notable British example is the Clark case. See Nobles and Schiff (2005) for details. Finally, we welcome and, in fact, encourage members of the scientific community to provide alternative analyses of the data.
description: Published in at http://dx.doi.org/10.1214/07-AOAS154 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Οι παράγοντες που επηρεάζουν τις ρυπογόνες εκπομπές αερίων, μια ex-post ανάλυση για τον τομέα των οδικών εμπορευματικών μεταφορών:
Creators: name: Παπαγιαννοπούλου, Αναστασία Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: εκπομπές
μεταφορές
εμπορευματικές
emissions
transport
freight

description: Το ερευνητικό ερώτημα της διπλωματικής εξετάζει ποιοι είναι οι καθοριστικοί παράγοντες για τις εκπομπές στον τομέα των οδικών εμπορευματικών μεταφορών στην Σουηδία και πρόκειται για μια ex-post ανάλυση. Κίνητρο αποτέλεσε η έλλειψη κατανόησης των καθοριστικών παραγόντων για τις εκπομπές στον τομέα των οδικών εμπορευματικών μεταφορών στην χώρα. Αυτό το κενό γνώσης είναι σημαντικό, επειδή τα σενάρια σχετικά με τη μελλοντική εξέλιξη των εκπομπών, καθώς και η αντίστοιχη ανάγκη για μέσα πολιτικής, εξαρτώνται ζωτικά από την κατανόηση των καθοριστικών παραγόντων των εκπομπών του παρελθόντος. Στα πλαίσια της έρευνας διεξήχθησαν συνεντεύξεις με αρμόδιους φορείς προκειμένου να να συλλεχθούν πληροφορίες και δεδομένα και παρατίθεται καθ’όλη την έκταση της εργασίας μια ανασκόπηση βιβλιογραφίας. Επιπλέον πραγματοποιήθηκε μια οικονομετρική ανάλυση χρονολογικών σειρών από το 2000-2012 ώστε να ποσοτικοποιηθούν οι καθοριστικοί παράγοντες για τις εκπομπές στον τομέα των οδικών εμπορευματικών μεταφορών στη Σουηδία. Από τα αποτελέσματα προκύπτει η ανάγκη για πιο λεπτομερή στοιχεία και δεδομένα.
description: The research question of the thesis examines what are the determining factors for emissions in road freight transport in Sweden and it is an ex-post analysis. The motivation of the study was the lack of understanding of the determinants of emissions in road freight transport in Sweden. This knowledge gap is important because the scenarios for the future development of emissions and the corresponding need for policy instruments crucially depend on understanding the determinants of emissions of the past. As part of the thesis interviews were conducted with relevant stakeholders in order to collect data and information. Also throughout the thesis there is a literature review for the subject. Moreover an econometric analysis of time series from 2000-2012 were conducted to quantify the determinants of emissions in road freight transport in Sweden. The results indicate the need for more detailed information and data.
What Do Electromagnetic Plasmas Tell Us about Quark-Gluon Plasma?
Creators: name: Mrowczynski, Stanislaw
name: Thoma, Markus H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Since the quark-gluon plasma (QGP) reveals some obvious similarities to the well-known electromagnetic plasma (EMP), an accumulated knowledge on EMP can be used in the QGP studies. After discussing similarities and differences of the two systems, we present theoretical tools which are used to describe the plasmas. The tools include: kinetic theory, hydrodynamic approach and diagrammatic perturbative methods. We consider collective phenomena in the plasma with a particular emphasis on instabilities which crucially influence temporal evolution of the system. Finally, properties of strongly coupled plasma are discussed.
description: 34 pages, submitted to Annual Review of Nuclear and Particle Science
First Principles Calculations of Shock Compressed Fluid Helium
Creators: name: Militzer, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The properties of hot dense helium at megabar pressures were studied with two first-principles computer simulation techniques, path integral Monte Carlo and density functional molecular dynamics. The simulations predicted that the compressibility of helium is substantially increased by electronic excitations that are present in the hot fluid at thermodynamic equilibrium. A maximum compression ratio of 5.24(4)-fold the initial density was predicted for 360 GPa and 150000 K. This result distinguishes helium from deuterium, for which simulations predicted a maximum compression ratio of 4.3(1). Hugoniot curves for statically precompressed samples are also discussed.
description: Accepted to publication in Physical Review Letters
Self--similar and charged radiating spheres: An anisotropic approach
Creators: name: Barreto, W.
name: Rodríguez, B.
name: Rosales, L.
name: Serrano, O.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Considering charged fluid spheres as anisotropic sources and the diffusion limit as the transport mechanism, we suppose that the inner space--time admits self--similarity. Matching the interior solution with the Reissner--Nordström--Vaidya exterior one, we find an extremely compact and oscillatory final state with a redistribution of the electric charge function and non zero pressure profiles.
description: 12 pages, 8 figures. To appear in Gen. Rel. Grav
Deep reinforcement learning with a particle dynamics environment applied to emergency evacuation of a room with obstacles
Creators: name: Zhang, Yihao
name: Chai, Zhaojie
name: Lykotrafitis, George
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: A very successful model for simulating emergency evacuation is the social-force model. At the heart of the model is the self-driven force that is applied to an agent and is directed towards the exit. However, it is not clear if the application of this force results in optimal evacuation, especially in complex environments with obstacles. Here, we develop a deep reinforcement learning algorithm in association with the social force model to train agents to find the fastest evacuation path. During training, we penalize every step of an agent in the room and give zero reward at the exit. We adopt the Dyna-Q learning approach. We first show that in the case of a room without obstacles the resulting self-driven force points directly towards the exit as in the social force model and that the median exit time intervals calculated using the two methods are not significantly different. Then, we investigate evacuation of a room with one obstacle and one exit. We show that our method produces similar results with the social force model when the obstacle is convex. However, in the case of concave obstacles, which sometimes can act as traps for agents governed purely by the social force model and prohibit complete room evacuation, our approach is clearly advantageous since it derives a policy that results in object avoidance and complete room evacuation without additional assumptions. We also study evacuation of a room with multiple exits. We show that agents are able to evacuate efficiently from the nearest exit through a shared network trained for a single agent. Finally, we test the robustness of the Dyna-Q learning approach in a complex environment with multiple exits and obstacles. Overall, we show that our model can efficiently simulate emergency evacuation in complex environments with multiple room exits and obstacles where it is difficult to obtain an intuitive rule for fast evacuation.
description: 30 pages, 8 figures, 6 supplemental figures
Συνοπτική και δυναμική μελέτη του φαινομένου της χιονόπτωσης στη Θεσσαλονίκη.:
Creators: name: Γιαννουλάκης, Ιωάννης Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: subject: Γεωλογία
subject: Θεσσαλονίκη
subject: Χιονόπτωση
subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Thessaloniki
subject: Snowfall

description: Γίνεται μια προσπάθεια μελέτης της συνοπτικής κατάστασης που ευνοεί το φαινόμενο της χιονόπτωσης στην περιοχή της Θεσσαλονίκης. Χρησιμοποιούνται χάρτες, για την ημέρα χιονόπτωσης (D), καθώς και για δύο ημέρες πριν (D-2), αλλά και μία ημέρα μετά (D+1), από την ημέρα χιονόπτωσης, για διάφορα ισοβαρικά επίπεδα από την επιφάνεια μέχρι και τα 300hPa για την χρονική περίοδο 1980-2011. Χρησιμοποιούνται επίσης δεδομένα που προέρχονται από ραδιοβολίσεις του Περιφερειακού Μετεωρολογικού Κέντρου Μακεδονίας στη Θεσσαλονίκη. Ιδιαίτερη έμφαση δίνεται στο επίπεδο παγοποίησης, στο πάχος στρώματος 500-1000hPa καθώς και σε άλλες παραμέτρους που συνδέονται με την σχετική υγρασία. To φαινόμενο της χιονόπτωσης οφείλεται σε συνοπτικές καταστάσεις, οι οποίες μελετούνται και ταξινομούνται με βάση την ένταση τους. Στη συνέχεια, τα αποτελέσματα αναλύονται με βάση τα θερμοδυναμικά και δυναμικά τους χαρακτηριστικά. Πιστεύεται ότι τα αποτελέσματα θα αποτελέσουν αντικείμενο περεταίρω μελέτης καθώς και ένα χρήσιμο προγνωστικό εργαλείο.
description: An attempt is made to study the synoptic situations which cause snowfall in the Thessaloniki area. Weather charts are used for the snowfall day and three days before and after the event, for various isobaric levels -from the surface to 300hPa- for the period 1980-2011. Additional data information is retrieved from radiosondes of the Regional Meteorological Center of Macedonia in Thessaloniki. Emphasis is given to the height of the freezing level, the 500-1000hPa thickness and parameters related to the relative humidity. The snow producing synoptic situations which are studied and classified in order to identify the most favorable ones. The resulted are further analyzed from the thermodynamic and dynamic point of view. It is believed that the concluded results will initiate further studies and provide a valuable and useful tool to forecasting skills.
Inerter-based technology for mitigating offshore wind turbine vibrations
Creators: name: Li, Yi-Yuan
name: Park, Semyung
name: Jiang, Jason Zheng
name: Lackner, Matthew
name: Neild, Simon
name: Ward, Ian
Publisher: name: Zenodo
Year: 2019
Subjects: Floating offshore wind turbines, Structural control, vibration mitigation, Inerter

description: Presentation at WESC 2019
Gravitational instability on the brane: the role of boundary conditions
Creators: name: Shtanov, Yuri
name: Viznyuk, Alexander
name: Sahni, Varun
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: An outstanding issue in braneworld theory concerns the setting up of proper boundary conditions for the brane-bulk system. Boundary conditions (BC's) employing regulatory branes or demanding that the bulk metric be nonsingular have yet to be implemented in full generality. In this paper, we take a different route and specify boundary conditions directly on the brane thereby arriving at a local and closed system of equations (on the brane). We consider a one-parameter family of boundary conditions involving the anisotropic stress of the projection of the bulk Weyl tensor on the brane and derive an exact system of equations describing scalar cosmological perturbations on a generic braneworld with induced gravity. Depending upon our choice of boundary conditions, perturbations on the brane either grow moderately (region of stability) or rapidly (instability). In the instability region, the evolution of perturbations usually depends upon the scale: small scale perturbations grow much more rapidly than those on larger scales. This instability is caused by a peculiar gravitational interaction between dark radiation and matter on the brane. Generalizing the boundary conditions obtained by Koyama and Maartens, we find for the Dvali-Gabadadze-Porrati model an instability, which leads to a dramatic scale-dependence of the evolution of density perturbations in matter and dark radiation. A different set of BC's, however, leads to a more moderate and scale-independent growth of perturbations. For the mimicry braneworld, which expands like LCDM, this class of BC's can lead to an earlier epoch of structure formation.
description: 35 pages, 9 figures, an appendix and references added, version to be published in Classical and Quantum Gravity
Ο λόγος για την κοινωνική αλλαγή σε συνθήκες κρίσης. Ελλάδα 2010-2013:
Creators: name: Κούτση, Διονυσία Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Κοινωνική αλλαγή
Οικονομική κρίση
Κοινωνική σταθερότητα
Social change
Financial crisis
Social stability

description: Στην παρούσα έρευνα μελετήσαμε τον λόγο των Ελλήνων πολιτών για την κοινωνική αλλαγή. Χωρίσαμε την μελέτη της κοινωνικής αλλαγής σε δύο ενότητες, σ' αυτήν που έχει ήδη συντελεστεί με αφορμή την οικονομική κρίση και σ΄ αυτήν που θα μπορούσε να συμβεί στο μέλλον. Επιπλέον, εστιάσαμε την ανάλυση μας στο υποκείμενο και στα μέσα επίτευξης της αλλαγής τόσο στο παρόν όσο και στο μέλλον. Για την συλλογή των δεδομένων μας, πραγματοποιήσαμε 10 ημι- δομιμένες συνεντεύξεις με Έλληνες πολίτες ηλικίας από 25-45 ετών, ενώ χρησιμοποιήσαμε την θεματική ανάλυση για να εντοπίσουμε τα θέματα που αναδεικνύονται στην περιγραφή της κοινωνικής αλλαγής. Από την ανάλυση μας φάνηκε ότι στην περιγραφή της συντελεσμένης αλλαγής η οικονομική ύφεση αποτελεί κεντρικό θέμα, ενώ το υποκείμενο της αλλαγής είναι είτε ο ελληνικός λαός, είτε οι πολιτικές ηγεσίες είτε και οι δύο μαζί. Στην περιγραφή του μέλλοντος, είδαμε ότι η αλλαγή μπορεί να επιτευχθεί είτε από μια νέα ηγεσία που θα ακολουθήσει διαφορετικές πολιτικές είτε από τον λαό μέσα από την συλλογική δράση.
description: In this study, we explore the Greek people's discourse about social change . We separated this study in two section; the first one refers to social change that has already occurred because of financial crisis and the second one to social change that could be happen in the future. We collected our data by conducting 10 semi-structured interviews with Greek citizens between 25 to 45 years old. We applied thematic analysis to our data in order to define the themes that are used in the description of social change. Analysis revealed that, in the description of social change has already occurred, economic recession was central, and that Greek people and Greek politicians, separately or both of them, are responsible for that change. As for the description of future social change, that could be achieved either by a new leadership that will apply different politics or by people through collective action.
The Mystery of Bloom-Gilman Duality: A Light Front Holographic QCD Perspective
Creators: name: Sheckler, Aiden B.
name: Miller, Gerald A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Light front wave functions motivated by holographic constructions are used to study Bloom-Gilman duality of deep inelastic scattering. Separate expressions for structure functions in terms of quark and hadronic degrees of freedom are presented, with a goal of relating the two expressions. A two-parton model is defined and resonance transition form factors are computed using previously derived light front wave functions. A new form of global duality is derived from the valence quark-number sum rule. Using a complete set of hadronic states is necessary for this new global duality to be achieved. Previous original work does not provide such a set. This is remedied by amending the model to include a longitudinal confining potential, and the resulting complete set is sufficient to carry out the study of Bloom-Gilman duality. Expressions for transition form factors are obtained and all are shown to fall asymptotically as 1/Q2. The Feynman mechanism dominates the asymptotic behavior of the model. These transition form factors are used to assess the validity of the global and local duality sum rules, with the result that both neither are satisfied. Evaluations of the hadronic expression for q(x,Q2) provide more details about this lack. This result shows that the observed validity of both global and local forms of duality for deep inelastic scattering must be related to a feature of QCD that is deeper than completeness. Our simple present model suggests a prediction that Bloom-Gilman duality would not be observed if deep inelastic scattering experiments were to be made on the pion. The underlying origin of the duality phenomenon in deep inelastic scattering is deeply buried within the confinement aspects of QCD, and remains a mystery.
Non-resonant Raman response of inhomogeneous structures in the electron doped $t-t'$ Hubbard model
Creators: name: Valenzuela, Belén
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We calculate the non-resonant Raman response, the single particle spectra and the charge-spin configuration for the electron doped $t-t'$ Hubbard model using unrestricted Hartree-Fock calculations. We discuss the similarities and differences in the response of homogeneous versus inhomogeneous structures. Metallic antiferromagnetism dominates in a large region of the $U-n$ phase diagram but at high values of the on-site interaction and for intermediate doping values, inhomogeneous configurations are found with lower energy. This result is in contrast with the case of hole doped cuprates where inhomogeneities are found already at very low doping. The inhomogeneities found are in-phase stripes compatible with inelastic neutron scattering experiments. They give an incoherent background in the Raman response. The $B_{2g}$ signal can show a quasiparticle-like component even when no Fermi surface is found in the nodal direction.
description: 8 pages, 10 figures, accepted for publication in Phys. Rev. B
Analyzing the Capacity of Distributed Vector Representations to Encode Spatial Information
Creators: name: Mirus, Florian
name: Stewart, Terrence C.
name: Conradt, Jorg
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Vector Symbolic Architectures belong to a family of related cognitive modeling approaches that encode symbols and structures in high-dimensional vectors. Similar to human subjects, whose capacity to process and store information or concepts in short-term memory is subject to numerical restrictions,the capacity of information that can be encoded in such vector representations is limited and one way of modeling the numerical restrictions to cognition. In this paper, we analyze these limits regarding information capacity of distributed representations. We focus our analysis on simple superposition and more complex, structured representations involving convolutive powers to encode spatial information. In two experiments, we find upper bounds for the number of concepts that can effectively be stored in a single vector.
On The Problem of Constraints In Nonextensive Formalism: A Quantum Mechanical Treatment
Creators: name: Bagci, Gokhan B.
name: Arda, Altug
name: Sever, Ramazan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Relative entropy (divergence) of Bregman type recently proposed by T. D. Frank and Jan Naudts is considered and its quantum counterpart is used to calculate purity of the Werner state in nonextensive formalism. It has been observed that two different expressions arise due to two different forms of quantum divergences. It is then argued that the difference is due to the fact that the relative entropy of Bregman type is related to the first choice thermostatistics whereas the one of Csiszàr type is related to the third choice thermostatistics. The superiority of the third choice thermostatistics to the first choice thermostatistics has been deduced by noticing that the expression obtained by using the Bregman type leads to negative values for q$\in (0,1)$ and fidelity F smaller than 1 whereas the one obtained by using Csiszàr type is free from such anomalies. Moreover, it has been noted that these two measures show different qualitative behavior with respect to F. Contrary to the classical case, the violation of the positive definiteness of the relative entropy immediately results in a choice between the two constraints without any need of more abstract Shore-Johnson axioms. The possibility of writing a relative entropy of Bregman type compatible with the third choice has been investigated further. The answer turns out to be negative as far as the usual transformation from ordinary probabilities to the escort probabilities are considered.
Functionalized CdTe Fluorescence Nanosensor for the Sensitive Detection of Water Borne Environmentally Hazardous Metal Ions
Creators: name: Pooja
name: Chowdhury, Papia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: In this work, we have investigated the possibility of using COOH functionalized CdTe quantum dots (QDs) as fluorescent nanosensor for the detection of some environmentally hazardous metal ions ($\rm{Cr^{3+}}$, $\rm{Pb^{2+}}$, $\rm{Cu^{2+}}$, $\rm{Zn^{2+}}$ and $\rm{Co^{2+}}$) in aqueous phase. COOH-CdTe QDs are prepared in aqueous medium and characterized by UV-visible, photo luminescence and FTIR spectrometry. Optical response of CdTe nanosensor is observed to be time and temperature dependent. A strong "Turn-Off" fluorescence response of CdTe is observed in presence of all metals ions ($\rm{X^{n+}}$). The output of Stern volmer relation, graphical Job's plot and FTIR data established the existence of strong 1:1 complexation ($\rm{X^{n+}: ^{-}OOC-CdTe)}$ between CdTe and metal ions. CdTe shows its efficient sensing ability for $\rm{Pb^{2+}}$, $\rm{Cr^{3+}}$ and $\rm{Cu^{2+}}$ ions up to concentration $\rm{10^{-14}}$ M which was established by its low detection of limit (LOD)validation. Further, strong appearance of $\frac{F-F_{0}}{F_{0}}$ establishes the better sensing capability of CdTe QDs for $\rm{Cr^{3+}}$, $\rm{Pb^{2+}}$, $\rm{Cu^{2+}}$ ions which are far better than the existing fluorescent sensors available in industry. The proposed optical techniques and principal component analysis of sensing were successfully applied for testing of dissolved metal ions in real samples like: paint, river water, rain water etc which validates the applicability of COOH functionalized CdTe nanosensor as a effective successful optical sensor for water dissolved metal ions which are responsible for water pollution.
description: The selectivity and optical sensing ability of COOH-CdTe fluorescence nanosensor for the detection of different water borne environmentally hazardous metal ions have been tested
Intermittent random walks for an optimal search strategy: One-dimensional case
Creators: name: Oshanin, G.
name: Wio, H. S.
name: Lindenberg, K.
name: Burlatsky, S. F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study the search kinetics of an immobile target by a concentration of randomly moving searchers. The object of the study is to optimize the probability of detection within the constraints of our model. The target is hidden on a one-dimensional lattice in the sense that searchers have no a priori information about where it is, and may detect it only upon encounter. The searchers perform random walks in discrete time n=0,1,2, ..., N, where N is the maximal time the search process is allowed to run. With probability αthe searchers step on a nearest-neighbour, and with probability (1-α) they leave the lattice and stay off until they land back on the lattice at a fixed distance L away from the departure point. The random walk is thus intermittent. We calculate the probability P_N that the target remains undetected up to the maximal search time N, and seek to minimize this probability. We find that P_N is a non-monotonic function of α, and show that there is an optimal choice α_{opt}(N) of αwell within the intermittent regime, 0 < α_{opt}(N) < 1, whereby P_N can be orders of magnitude smaller compared to the "pure" random walk cases α=0 and α= 1.
description: 19 pages, 5 figures; submitted to Journal of Physics: Condensed Matter; special issue on Chemical Kinetics Beyond the Textbook: Fluctuations, Many-Particle Effects and Anomalous Dynamics, eds. K.Lindenberg, G.Oshanin and M.Tachiya
Myth versus reality : attitudes, expections, and expectation-experience discrepancies in first-time mothers
Creators: name: Regev, Michal
Publisher: name: University of British Columbia
Year: 2009

description: A qualitative paradigm was employed in this study to explore the experience of becoming a mother for the first time. More specifically, this study was designed to explore attitudes, expectations, and expectation-experience discrepancies in firsttime mothers. Twelve pregnant women who were to become first time mothers were each interviewed twice. Once during the last trimester of their pregnancy, and once 8-10 weeks after they have had the baby. An interview guide technique has been employed in both interviews. The interviews included questions which were drawn from the current literature on the Myth of Motherhood and on the phenomenon of expectation-experience discrepancy. The results of this study indicated that the participants attitudes and expectations of motherhood reflected the myth of motherhood as it is described in the literature with minor changes. Furthermore, it was found that most of the participants had expectation-experience discrepancy in a few areas. In addition, women who reported more positive and less negative expectation-experience discrepancies also reported to be generally in a good mood, whereas women who reported more negative and less positive expectation-experience discrepancies also reported to be generally in a bad mood.
Extremal metrics on blow ups
Creators: name: Arezzo, C.
name: Pacard, F.
name: Singer, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58E11; 32C17

description: Given a compact Kahler manifold with an extremal metric (M,ω), we give sufficient conditions on finite sets points p_1,...,p_n and weights a_1,...a_n for which the blow up of M at p_1,...,p_n has an extremal metric in the Kahler class π^*[ω] - ε(a_1 PD[E_1] + .. + a_n PD[E_n]) for all εsufficiently small. In particular our result implies that if (M,ω) is a toric manifold and p_1,...,p_n is any subset of the fixed locus of the torus action, then such metrics exist for any choice of the weights. The relationship with previous constructions of the first two authors for Kahler constant scalar curvature metrics is discussed.
description: 39 pages
Comparative genomic analysis in Leishmania spp. reveals new insights into their metabolism and genome regulation
Creators: name: J. Eduardo Martínez Hernández
name: Molina, Cristian
name: Correia, Bruno
name: Maracaja-Coutinho, Vinicius
name: Martin, Alberto M.
Publisher: name: F1000 Research Limited
Year: 2019

description: In this work we investigate the relation between the metabolism and gene regulation of Leishmania species
Vector semi-Fredholm Toeplitz operators and mean winding numbers
Creators: name: Yakubovich, Dmitry V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Functional Analysis (math.FA)
subject: Complex Variables (math.CV)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 47B35 (Primary), 47A53 (Secondary)

description: For a continuous complex-valued function g on the real line without zeros, several notions of a mean winding number are introduced. We give necessary conditions for a Toeplitz operator with matrix-valued symbol G to be semi-Fredholm in terms of mean winding numbers of det G. The matrix function G is assumed to be continuous on the real line, and no other apriori assumptions on it are made.
description: Third version: 17 pages. Close to the final one. TO appear in Nagoya Math. J
Review of the ${\mathbf Λ}$(1405): A curious case of a strange-ness resonance
Creators: name: Mai, Maxim
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: During its long-lasting history, the $Λ(1405)$ has become a benchmark for our understanding of the $\rm SU(3)$ hadron dynamics. Starting with its theoretical prediction and later experimental verification, until the most recent debates on the existence of the second broad pole, it emerged as a fruitful research area sparking many theoretical and experimental developments. This review intends to provide the reader with the current status of research on the $Λ(1405)$-resonance, reflecting on historical, experimental and theoretical developments. A common database for experimental results and a comparison of most recent theoretical approaches will be provided in the last two parts of this manuscript.
description: Invited contribution to the EPJST. (21 pages, 7 figures)
$B \to ππ$ decays: branching ratios and CP asymmetries
Creators: name: Kaidalov, A. B.
name: Vysotsky, M. I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Theoretically motivated smallness of the penguin amplitude in $B \to ππ$ decays allowes to calculate the value of the unitarity triangle angle $α(ϕ_2)$ with good accuracy. The relatively large branching ratio of the decay into $π^0 π^0$ is explained by the large value of FSI phase difference between $ΔI = 1/2$ and $ΔI = 3/2$ tree amplitudes.
description: Analysis of direct CPV asymmetries is expanded; the relation with that in $K\pi$ decays is discussed. Submitted to Yad. Fiz
Quantifying bid-ask spreads in the Chinese stock market using limit-order book data: Intraday pattern, probability distribution, long memory, and multifractal nature
Creators: name: Gu, Gao-Feng
name: Chen, Wei
name: Zhou, Wei-Xing
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: The statistical properties of the bid-ask spread of a frequently traded Chinese stock listed on the Shenzhen Stock Exchange are investigated using the limit-order book data. Three different definitions of spread are considered based on the time right before transactions, the time whenever the highest buying price or the lowest selling price changes, and a fixed time interval. The results are qualitatively similar no matter linear prices or logarithmic prices are used. The average spread exhibits evident intraday patterns consisting of a big L-shape in morning transactions and a small L-shape in the afternoon. The distributions of the spread with different definitions decay as power laws. The tail exponents of spreads at transaction level are well within the interval $(2,3)$ and that of average spreads are well in line with the inverse cubic law for different time intervals. Based on the detrended fluctuation analysis, we found the evidence of long memory in the bid-ask spread time series for all three definitions, even after the removal of the intraday pattern. Using the classical box-counting approach for multifractal analysis, we show that the time series of bid-ask spread does not possess multifractal nature.
description: 8 EPJ pages including 7 eps figures