cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Deterministic single-atom source of quasi-superradiant $N$-photon pulses
Creators: name: Groiseau, Caspar
name: Elliott, Alexander E. J.
name: Masson, Stuart J.
name: Parkins, Scott
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a single-atom, cavity quantum electrodynamics system, compatible with recently demonstrated, fiber-integrated micro- and nano-cavity setups, for the on-demand production of optical number-state, $0N$-state, and binomial-code-state pulses. The scheme makes use of Raman transitions within an entire atomic ground-state hyperfine level and operates with laser and cavity fields detuned from the atomic transition by much more than the excited-state hyperfine splitting. This enables reduction of the dynamics to that of a simple, cavity-damped Tavis-Cummings model with the collective spin determined by the total angular momentum of the ground hyperfine level.
description: 14 pages, 10 figures
RISC micrprocessor verification
Creators: name: Nagar, Mitul S
name: Suthar, Haresh A
name: Panchal, Chintan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: Today's microprocessors have grown significantly in complexity and functionality. Most of today's processors provide at least three levels of memory hierarchy, are heavily pipelined, and support some sort of cache coherency protocol. These features are extremely complex and sophisticated, and present their own set of unique verification challenges. Verification is clearly not a point tool, but is part of a process that starts from initial product conception and is to some degrees complete when the product goes to market. Functional verification is necessary to verify the functionality at RTL level. Complex micro-processors like ARM are high performance, low cost and low power 32-bit RISC processors. In our paper complex microprocessor is ARM cortex M3, developed for the embedded applications having low interrupt latency, low gate count, 3- stage pipelining, branch prediction, THUMB and THUMB-2 instruction set. Functional verification is used to verify that the circuit full fills each abstract assertion under the implementation mapping. we explore several aspects of processor design, including caches, pipeline depth, ALUs, and bypass logic.The verification was done concurrently with the design implementation of the processor.
description: 4 pages, 7 images ans a table. ISBN No: 978-81-906220-3 -5
Iranis: A Large-scale Dataset of Farsi License Plate Characters
Creators: name: Tourani, Ali
name: Soroori, Sajjad
name: Shahbahrami, Asadollah
name: Akoushideh, Alireza
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: I.2; I.2.6; I.2.10; I.4

description: Providing huge amounts of data is a fundamental demand when dealing with Deep Neural Networks (DNNs). Employing these algorithms to solve computer vision problems resulted in the advent of various image datasets to feed the most common visual imagery deep structures, known as Convolutional Neural Networks (CNNs). In this regard, some datasets can be found that contain hundreds or even thousands of images for license plate detection and optical character recognition purposes. However, no publicly available image dataset provides such data for the recognition of Farsi characters used in car license plates. The gap has to be filled due to the numerous advantages of developing accurate deep learning-based systems for law enforcement and surveillance purposes. This paper introduces a large-scale dataset that includes images of numbers and characters used in Iranian car license plates. The dataset, named Iranis, contains more than 83,000 images of Farsi numbers and letters collected from real-world license plate images captured by various cameras. The variety of instances in terms of camera shooting angle, illumination, resolution, and contrast make the dataset a proper choice for training DNNs. Dataset images are manually annotated for object detection and image classification. Finally, and to build a baseline for Farsi character recognition, the paper provides a performance analysis using a YOLO v.3 object detector.
description: 9 pages, 4 figures, 2 tables
Influence of fast emissions and statistical de-excitation on the isospin transport ratio
Creators: name: Camaiani, A.
name: Piantelli, S.
name: Ono, A.
name: Casini, G.
name: Borderie, B.
name: Bougault, R.
name: Ciampi, C.
name: Duenas, J. A.
name: Frosin, C.
name: Frankland, J. D.
name: Gruyer, D.
name: LeNeindre, N.
name: Lombardo, I.
name: Mantovani, G.
name: Ottanelli, P.
name: Parlog, M.
name: Pasquali, G.
name: Upadhyaya, S.
name: Valdré, S.
name: Verde, G.
name: Vient, E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Isospin transport ratio is a powerful method to estimate the neutron-proton (n-p) equilibration in heavy-ion collisions, and extensively used to obtain information on the asy-stiffness of the nuclear Equation of State. In fact such a ratio is expected to bypass any perturbations introducing a linear transformation of the chosen observable. In particular, it is supposed to overcome contributions due to emission, either of dynamical or statistical nature, from the primary fragments formed during the collisions. In this paper we explore the validity of this assumption, looking at the quasi-projectile n-p ratio ($N/Z$) in peripheral and semi-peripheral events for Ca+Ca reactions at 35\amev{}, simulated via the Antisymmetrized Molecular Dynamics transport model, coupled to different statistical decay codes. The statistical de-excitation of the primary fragments introduces a linear transformation at relatively high excitation energies (above 2\amev{}) when the residue approaches the Evaporation Attractor Line, while some effect is produced at lower excitation energies due to the occurrence of some non-linearities. As for fast emissions after the end of the projectile-target interaction it is shown that they introduce a non-linear transformation too.
Η επίδραση των Blogs στην αγοραστική απόφαση του καταναλωτή για προϊόντα υψηλής ανάμιξης. Μελέτη περίπτωσης του iPhone:
Creators: name: Καραγιαννίδης, Κωνσταντίνος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Αγοραστική απόφαση καταναλωτή
Ανάμιξη καταναλωτή
Κοινωνικά δίκτυα
Blogs
Κινητά τηλέφωνα
iPhone
Consumer purchase decision
High involvement
Social Media
Mobile phones

description: Σκοπός της παρούσας έρευνας είναι να μελετήσει πως επηρεάζουν τα τεχνολογικά blogs την αγοραστική απόφαση των καταναλωτών για προϊόντα υψηλής ανάμιξης και πιο συγκεκριμένα την πρόθεση αγοράς ενός καταναλωτή για ένα κινητό τηλέφωνο. Προκειμένου να απαντηθεί το συγκεκριμένο ερώτημα, επιλέχθηκαν η ποιοτική μεθοδολογία και ως εργαλείο συλλογής δεδομένων, οι σε βάθος συνεντεύξεις. Το δείγμα της έρευνας μας αποτελούνταν από 30 κατόχους κινητών τηλεφώνων iPhone της Apple, διαφορετικών ηλικιών, φύλου και μορφωτικού επιπέδου. Από την ανάλυση των δεδομένων, προέκυψε ότι επηρεάζεται η πρόθεση αγοράς ενός καταναλωτή για ένα κινητό τηλέφωνο σε ένα αρκετά μεγάλο βαθμό από τα σχόλια των άλλων χρηστών τα οποία διαβάζει σε διάφορα τεχνολογικά blogs. Επίσης, άλλοι παράγοντες που επηρεάζουν την πρόθεση αγοράς ενός καταναλωτή για ένα κινητό τηλέφωνο, είναι η διαδραστικότητα που έχει ένα blog και η αναγνωρισιμότητα της εμπορικής μάρκας του κινητού τηλεφώνου. Η παρούσα έρευνα με βάση την βιβλιογραφία στην οποία βασίστηκε, ασχολείται με παράγοντες (αξιοπιστία πληροφοριών, ποσότητα πληροφοριών, δομή και εμφάνιση ενός blog) οι οποίοι δεν έχουν μελετηθεί εκτενώς στο πως επηρεάζουν την πρόθεση αγοράς ενός καταναλωτή για ένα κινητό τηλέφωνο.
description: The purpose of this research is to study how technology blogs are affecting consumer’s purchase decision for high involvement products and particularly consumer’s purchase intention for a mobile phone. In order to answer this question, there has been selected the qualitative methodology and as a tool for data collection the in-depth interviews. The sample of our study consisted of 30 iPhone owners of different ages, gender and educational level. The analysis of the data revealed that the purchase intent of a consumer for a mobile phone has been affected to a fairly large extent by the comments of other users in various technology blogs. Also, other factors that affect a consumer's intention to purchase a mobile phone, is the interactivity that has a blog, and the visibility of the brand of the mobile phone. This research-based literature, addresses factors (reliability of information, quantity of information, structure and appearance of a blog) that have not been studied extensively so far.
Conserved charge fluctuations in the chiral limit
Creators: name: Sarkar, Mugdha
name: Kaczmarek, Olaf
name: Karsch, Frithjof
name: Lahiri, Anirban
name: Schmidt, Christian
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the signs of criticality in conserved charge fluctuations and related observables of finite temperature QCD at vanishing chemical potential, as we approach the chiral limit of two light quarks. Our calculations have been performed on gauge ensembles generated using Highly Improved Staggered Quark (HISQ) fermion action, with pion masses ranging from 140 MeV to 55 MeV.
description: 10 pages, 8 figures, Proceedings of workshop on Criticality in QCD and the Hadron Resonance Gas; 29-31 July 2020, Wroclaw, Poland
On the origin of the correlations between Gamma-Ray Burst observables
Creators: name: Dado, Shlomo
name: Dar, Arnon
name: De Rujula, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Several pairs of observable properties of Gamma Ray Bursts (GRBs) are known to be correlated. Many such correlations are straightforward predictions of the 'cannonball' model of GRBs. We extend our previous discussions of the subject to a wealth of new data, and to correlations between 'lag-time', 'variability' and 'minimum rise-time', with other observables. Schaefer's recent systematic analysis of the observations of many GRBs of known red-shift gives us a good and updated data-basis for our study.
description: Added Appendix. Accepted for publication in The Astrophysical Journal
O'KKLT
Creators: name: Kallosh, Renata
name: Linde, Andrei
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose to combine the quantum corrected O'Raifeartaigh model, which has a dS minimum near the origin of the moduli space, with the KKLT model with an AdS minimum. The combined effective N=1 supergravity model, which we call O'KKLT, has a dS minimum with all moduli stabilized. Gravitino in the O'KKLT model tends to be light in the regime of validity of our approximations. We show how one can construct models with a light gravitino and a high barrier protecting vacuum stability during the cosmological evolution.
description: 12 pages, 4 figures, a reference added, the version to appear in JHEP
A Qualitative Study of Application-level Caching
Creators: name: Mertz, Jhonny
name: Nunes, Ingrid
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Latency and cost of Internet-based services are encouraging the use of application-level caching to continue satisfying users' demands, and improve the scalability and availability of origin servers. Despite its popularity, this level of caching involves the manual implementation by developers and is typically addressed in an ad-hoc way, given that it depends on specific details of the application. As a result, application-level caching is a time-consuming and error-prone task, becoming a common source of bugs. Furthermore, it forces application developers to reason about a crosscutting concern, which is unrelated to the application business logic. In this paper, we present the results of a qualitative study of how developers handle caching logic in their web applications, which involved the investigation of ten software projects with different characteristics. The study we designed is based on comparative and interactive principles of grounded theory, and the analysis of our data allowed us to extract and understand how developers address cache-related concerns to improve performance and scalability of their web applications. Based on our analysis, we derived guidelines and patterns, which guide developers while designing, implementing and maintaining application-level caching, thus supporting developers in this challenging task that is crucial for enterprise web applications.
Cross-artform performance using networked interfaces: Last Man to Die's Vital LMTD
Creators: name: Martin, Charles
name: Forster, Benjamin
name: Cormick, Hanna
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: H.5.5

description: In 2009 the cross artform group, Last Man to Die, presented a series of performances using new interfaces and networked performance to integrate the three artforms of its members (actor, Hanna Cormick, visual artist, Benjamin Forster and percussionist, Charles Martin). This paper explains our artistic motivations and design for a computer vision surface and networked heartbeat sensor as well as the experience of mounting our first major work, Vital LMTD.
Science world roadshows : A study of effects in one community
Creators: name: Ritchie, Allisa Janet
Publisher: name: University of British Columbia
Year: 2009

description: This paper presents a review of the impact of SCIENCE WORLD'S travelling Roadshows program on one community. The Roadshows program is a non-formal science education program performed in school auditoriums for approximately 100 elementary students around British Columbia, Canada. In March, 1994 the Roadshows performed two Science Carnival Shows - a potpourri of fun science demonstrations for Kindergarten to Grade 3 students and one Arcs and Sparks show about electricity for Grade 4 to 7 students. The community in this study was a school in the Lower Mainland of British Columbia as well as the children, teachers, parents, administrators and surrounding libraries and toy stores. This study revealed that the Roadshows had a small impact on the community as a whole and a significant impact on several individuals. Through interviews of 12 Grade 5 students, their parents and teachers, it was found that discussion about the Roadshows continued over a 4 week period. Discussions took place between many different people in the study plus other family members not interviewed. Almost all of the comments about the Roadshows were positive. Students enjoyed the show and liked science more after the program. Many of them said they would "do more science" because of the Arcs and Sparks show and they said they knew more about science and learned a variety of specific things about electricity through the Roadshows presentation. They also learned about the dangers of electricity and three pieces of information about electricity which were taught in the show. Some parents felt that the program had a large impact on their sons or daughters. Parents saw changes in their children including an increase in self esteem, a new positive opinion of science, more discussion about science and interest in science fair projects on electricity. Most teachers felt the program was a positive experience for their students. This study shows that non-formal science education (sometimes referred to as informal science education) has its place in the world of science education.
Quantification of optical pulsed-plane-wave-shaping by chiral sculptured thin films
Creators: name: Geddes, J. B.
name: Lakhtakia, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The durations and average speeds of ultrashort optical pulses transmitted through chiral sculptured thin films (STFs) were calculated using a finite-difference time-domain algorithm. Chiral STFs are a class of nanoengineered materials whose microstructure comprises parallel helicoidal nanowires grown normal to a substrate. The nanowires are $\sim$10-300 nm in diameter and $\sim1-10 μ$m in length. Durations of transmitted pulses tend to increase with decreasing (free-space) wavelength of the carrier plane wave, while average speeds tend to increase with increasing wavelength. An increase in nonlinearity, as manifested by an intensity-dependent refractive index in the frequency domain, tends to increase durations of transmitted pulses and decrease average speeds. The circular Bragg phenomenon exhibited by a chiral STFs manifests itself in the frequency domain as high reflectivity for normally incident carrier plane waves whose circular polarization state is matched to the structural handedness of the film and whose wavelength falls in a range known as the Bragg regime; films of the opposite structural handedness reflect such plane waves little. This effect tends to distort the shapes of transmitted pulses with respect to the incident pulses, and such shaping can cause sharp changes in some measures of average speed with respect to carrier wavelength. A local maximum in the variation of one measure of the pulse duration with respect to wavelength is noted and attributed to the circular Bragg phenomenon. Several of these effects are explained via frequency-domain arguments. The presented results serve as a foundation for future theoretical and experimental studies of optical pulse propagation through causal, nonlinear, nonhomogeneous, and anisotropic materials.
description: To appear in Journal of Modern Optics
The extreme, red afterglow of GRB 060923A: Distance or dust?
Creators: name: Tanvir, N. R.
name: Levan, A. J.
name: Rol, E.
name: Starling, R. L. C.
name: Gorosabel, J.
name: Priddey, R. S.
name: Malesani, D.
name: Jakobsson, P.
name: O'Brien, P. T.
name: Jaunsen, A. O.
name: Hjorth, J.
name: Fynbo, J. P. U.
name: Melandri, A.
name: Gomboc, A.
name: Milvang-Jensen, B.
name: Fruchter, A. S.
name: Jarvis, M.
name: Fernandes, C. A. C.
name: Wold, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gamma-ray bursts are powerful probes of the early universe, but locating and identifying very distant GRBs remains challenging. We report here the discovery of the K-band afterglow of Swift GRB 060923A, imaged within the first hour post-burst, and the faintest so far found. It was not detected in any bluer bands to deep limits, making it a candidate very high redshift burst (z>11). However, our later-time optical imaging and spectroscopy reveal a faint galaxy coincident with the GRB position which, if it is the host, implies a more moderate redshift (most likely z<2.8) and therefore that dust is the likely cause of the very red afterglow colour. This being the case, it is one of the few instances so far found of a GRB afterglow with high dust extinction.
description: Submitted to MNRAS (revised in light of referee's comments)
Η ποιότητα ζωής των εφήβων και νέων με νοητική ανεπάρκεια:
Creators: name: Καρατάσιου, Ελένη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Νοητική υστέρηση
Ποιότητα ζωής
Κοινωνική ένταξη
Mental retardation
Quality of life
Social inclusion

description: Η παρούσα εργασία εξετάζει τα γενικά χαρακτηριστικά ανθρώπων με Νοητική Ανεπάρκεια, το επίπεδο ποιότητας της ζωής τους, τον βαθμό αυτοπροσδιορισμού τους και το εύρος των κοινωνικών σχέσεων που μπορούν να αναπτύξουν τα άτομα αυτά. Εξετάζεται, ακόμη, ο συσχετισμός της ποιότητας ζωής τους με οκτώ τομείς σύμφωνα με τον Schalock (1996): 1) συναισθηματική ποιότητα ζωής, (2) διαπροσωπικές σχέσεις, (3) υλική ποιότητα ζωής, (4) προσωπική εξέλιξη, (5) σωματική ποιότητα, (6) αυτό-προσδιορισμός, (7) κοινωνική ένταξη, (8) δικαιώματα. Στο πλαίσιο αυτό η παρούσα έρευνα, η οποία διενεργήθηκε με χρήση ερωτηματολογίου το σχολικό έτος 2013-2014 σε ειδικές σχολικές μονάδες της Θεσσαλονίκης, διερευνά την ποιότητα ζωής σε έφηβους και νέους ηλικίας 14 έως 24 ετών σε τέσσερις διαφορετικούς άξονες: ικανοποίηση, επάρκεια/παραγωγικότητα, ενδυνάμωση/ανεξαρτησία, ένταξη στην κοινότητα. Από τα ευρήματα της έρευνας συμπεραίνουμε πως γενικά υπάρχει ένα ικανοποιητικό επίπεδο ζωής για την κατηγορία των ατόμων αυτών.
description: The present study examines the general characteristics of people with Mental Retardation, the level of quality of life, the degree of self-determination and the extent to which they can develop social relationships. It also examines the correlation of quality of life with eight areas, according to Schalock (1996): 1) emotional quality of life, (2) interpersonal relations, (3) material quality of life, (4) personal development, (5) physical quality (6) self-determination, (7) social inclusion, (8) rights. In this context the present study, which was conducted by use of a questionnaire during the school year 2013-2014 in special schools in Thessaloniki, explores the quality of life of adolescents and young people aged 14-24 in four different areas: satisfaction, efficiency/productivity, empowerment/independence, and integration into the community. The research findings show that this category of people with MR has a satisfactory quality of life.
Influence of lasers propagation delay on the sensitivity of atom interferometers
Creators: name: Gouët, J. Le
name: Cheinet, P.
name: Kim, J.
name: Holleville, D.
name: Clairon, A.
name: Landragin, A.
name: Santos, F. Pereira Dos
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In atom interferometers based on two photon transitions, the delay induced by the difference of the laser beams paths makes the interferometer sensitive to the fluctuations of the frequency of the lasers. We first study, in the general case, how the laser frequency noise affects the performance of the interferometer measurement. Our calculations are compared with the measurements performed on our cold atom gravimeter based on stimulated Raman transitions. We finally extend this study to the case of cold atom gradiometers.
description: 17 pages, 6 figures
Η Έννοια της Εξουσίας και η προβληματική για το Κράτος στον Καρλ Μαρξ:
Creators: name: Κανδυλανάπτης, Νικόλαος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Μαρξ
Εξουσία
Κράτος
Marx
Authority
State

description: Σκοπός της διατριβής ήταν η μελέτη των θέσεων του Μαρξ για την εξουσία και το κράτος. Εκκινούμε από τις φιλοσοφικές επιρροές που οδήγησαν τον Μαρξ από τον ιδεαλισμό στον υλισμό με αποκορύφωμα τη διατύπωση της θεωρίας του ιστορικού υλισμού. Κατόπιν η μελέτη λαμβάνει χρονολογική-ιστορική μορφή. Ανιχνεύονται οι βασικές πολιτικές θέσεις του Μαρξ από τα έργα της νεότητας του μέχρι αυτά της ωριμότητας. Ο χωρισμός των έργων σε χρονολογικές περιόδους δε γίνεται με τη λογική της τομής. Άλλωστε σκοπός της εργασίας είναι η κατάδειξη της συνέχειας στη σκέψη του Μαρξ και η απόρριψη της άποψης περί ασυνέχειας, την οποία υιοθετούν πολλοί φιλόσοφοι και μελετητές. Στην πρώτη περίοδο διαμορφώνονται οι βασικές θέσεις του Μαρξ, οι οποίες στη βάση τους δεν αλλάζουν στο μέλλον. Στη δεύτερη περίοδο οι θέσεις αυτές εμπλουτίζονται και ενισχύονται από τις επισταμένες οικονομικές μελέτες του φιλοσόφου. Στην τελευταία περίοδο, χωρίς να αλλάζει το περιεχόμενο των θέσεων του, το έργο του αποκτά έναν περισσότερο επαναστατικό, από πολιτική άποψη, χαρακτήρα. Επιμέρους θέματα που εξετάζονται στην εργασία είναι η ατομική ιδιοκτησία, η αστική κοινωνία, ο καπιταλισμός, η επανάσταση, η απελευθέρωση της εργασίας, ο σοσιαλισμός-κομμουνισμός, η δημοκρατία κ.α.
description: The aim of the present treatise was the study of the Marxian ideas on authority and state. We begin with the philosophical influences that led Marx from idealism to materialism till the expression of the theory of historical materialism. Afterwards, the form of the study becomes chronological-historical. We search the basic political theses of Marx starting with the works of his youth to reach these of his maturity. We distinguish in his work chronological periods that do not have a character of separated sections. Besides, an aim of the study is the demonstration of the continuity of the Marxian thought and the rejection of the opposite thesis, which support many philosophers and scholars. In the first period, we have the formation of the basic Marxian political ideas, that do not change in the future. In the second period, Marx enriches and reinforces his theory as he studies economy in depth. Finally, in the third period, although the content remains the same, his work takes a more, politically, revolutionary character. Other specific matters we examine here are, among others, individual property, civil society, capitalism, revolution, liberation of work, socialism-communism,democracy.
Το μυστήριο του Θεού στους Θεολογικούς Λόγους του αγίου Συμεών του Νέου Θεολόγου.:
Creators: name: Ιωαννίδου, Σοφία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Το μυστήριο του Θεού
Θεολογικοί Λόγοι
άγιος Συμεών ο Νέος Θεολόγος
The mystery of God
Theological Orations
Saint Symeon the New Theologian.

description: Σκοπός της παρούσας διπλωματικής εργασίας ήταν η προσέγγιση του μυ¬στηρίου του Θεού, έχοντας ως βασική πηγή, τους τρεις Θεολογικούς Λόγους του αγίου Συμεών του Νέου Θεολόγου. Στο συγκεκριμένο σημείο, είναι αναγ¬καίο να σημειωθεί, πως ο ιερός πατέρας, μέσω της συγγραφής των τριών Θε¬ολο¬γικών του Λόγων, προβάλλει ξεκάθαρα την επικίνδυνη δύναμη του ορθο¬λογισμού εκείνης της εποχής, να ερευνά ακόμη και το ακατάληπτο του Θεού, προ¬σπα-θώντας να εξηγήσει με τη λογική τις ενδοτριαδικές σχέσεις των τριών Υπο-στάσεων. Παράλληλα, στη παρούσα εργασία παρατίθεται αναλυτικά η τρι¬αδική ομολογία πίστεως του αγίου Συμεών. Επίσης, δε λησμονείται η σταδιακή κατα-γραφή των προϋποθέσεων εκείνων, που απαιτούνται από την πλευρά του αν-θρώπου, για να τεθεί σε σωστές βάσεις η αληθινή γνώση περί του Θεού.
description: The purpose of this dissertation was to approach the mystery of God, having as a main source the three Theological Orations of Saint Symeon the New Theologian. At this point, it is important to note, that the holy father, through the writing of his three Theological Orations, points out explicitly the dangerous power of rationalism of his age, which investigated even the incomprehensible of God trying to explain through the use of logic the inter-Triadic relations of the three Hypostases. At the same time, this thesis presents in detail the Trinitarian confession of faith of Saint Symeon. Moreover, it includes the subject of the gradual registration of the presuppositions required by man in order the true knowledge of God to be placed on a proper foundation.
Neutrino Mixings and Leptonic CP Violation from CKM Matrix and Majorana Phases
Creators: name: Agarwalla, S. K.
name: Parida, M. K.
name: Mohapatra, R. N.
name: Rajasekaran, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The high scale mixing unification hypothesis recently proposed by three of us (R. N. M., M. K. P. and G. R.) states that if at the seesaw scale, the quark and lepton mixing matrices are equal then for quasi-degenerate neutrinos, radiative corrections can lead to large solar and atmospheric mixings and small reactor angle at the weak scale in agreement with data. Evidence for quasi-degenerate neutrinos could, within this framework, be interpreted as a sign of quark-lepton unification at high scale. In the current work, we extend this model to show that the hypothesis works quite successfully in the presence of CP violating phases (which were set to zero in the first paper). In the case where the PMNS matrix is identical to the CKM matrix at the seesaw scale, with a Dirac phase but no Majorana phase, the low energy Dirac phase is predicted to be ($\simeq 0.3^{\circ}$) and leptonic CP-violation parameter $J_{CP} \simeq (4 - 8)\times 10^{-5}$ and $θ_{13} = 3.5^{\circ}$. If on the other hand, the PMNS matrix is assumed to also have Majorana phases initially, the resulting theory damps radiative magnification phenomenon for a large range of parameters but nevertheless has enough parameter space to give the two necessary large neutrino mixing angles. In this case, one has $θ_{13} = 3.5^{\circ} - 10^{\circ}$ and $|J_{CP}|$ as large as $0.02-0.04$ which are accessible to long baseline neutrino oscillation experiments.
description: 15 pages and 10 figures, typo corrected
Pierre Auger Data, Photons, and Top-Down Cosmic Ray Models
Creators: name: Busca, Nicolas
name: Hooper, Dan
name: Kolb, Edward W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the ultra-high energy cosmic ray (UHECR) spectrum as measured by the Pierre Auger Observatory. Top-down models for the origin of UHECRs predict an increasing photon component at energies above about $10^{19.7}$eV. Here we present a simple prescription to compare the Auger data with a prediction assuming a pure proton component or a prediction assuming a changing primary component appropriate for a top-down model. We find that the UHECR spectrum predicted in top-down models is a good fit to the Auger data. Eventually, Auger will measure a composition-independent spectrum and will be capable of either confirming or excluding the quantity of photons predicted in top-down models.
description: 8 pages, 3 figures
Strike on Stage: a percussion and media performance
Creators: name: Martin, Charles
name: Lai, Chi-Hsia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Sound (cs.SD)
subject: Human-Computer Interaction (cs.HC)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper describes Strike on Stage, an interface and corresponding audio-visual performance work developed and performed in 2010 by percussionists and media artists Chi-Hsia Lai and Charles Martin. The concept of Strike on Stage is to integrate computer visuals and sound into an improvised percussion performance. A large projection surface is positioned directly behind the performers, while a computer vision system tracks their movements. The setup allows computer visualisation and sonification to be directly responsive and unified with the performers' gestures.
Evidence for mass renormalization in LaNiO$"" sub 3_: an in situ soft x-ray photoemission study of epitaxial films
Creators: name: Horiba, K.
name: Eguchi, R.
name: Taguchi, M.
name: Chainani, A.
name: Kikkawa, A.
name: Senba, Y.
name: Ohashi, H.
name: Shin, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the electronic structure of high-quality single-crystal LaNiO$_3$ (LNO) thin films using in situ photoemission spectroscopy (PES). The in situ high-resolution soft x-ray PES measurements on epitaxial thin films reveal the intrinsic electronic structure of LNO. We find a new sharp feature in the PES spectra crossing the Fermi level, which is derived from the correlated Ni 3$d$ $e_g$ electrons. This feature shows significant enhancement of spectral weight with decreasing temperature. From a detailed analysis of resistivity data, the enhancement of spectral weight is attributed to increasing electron correlations due to antiferromagnetic fluctuations.
description: 4 pages, 4 figures. submitted to Phys. Rev. B
Random, but not so much: A parameterization for the returns and correlation matrix of financial time series
Creators: name: Martins, Andre C. R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: A parameterization that is a modified version of a previous work is proposed for the returns and correlation matrix of financial time series and its properties are studied. This parameterization allows easy introduction of non-stationarity and it shows several of the characteristics of the true, observed realizations, such as fat tails, volatility clustering, and a spectrum of eigenvalues of the correlation matrix that can be understood as an extension of Random Matrix Theory results. The predicted behavior of this parameterization for the eigenvalues is compared with the eigenvalues of Brazilian assets and it is shown that those predictions fit the data better than Random Matrix Theory.
description: 4 pages, 3 figures
Aluminum depletion induced by complex co-segregation of carbon and boron in a Σ 5 [3 1 0] bcc-iron grain boundary
Creators: name: Ahmadian, Ali
name: Scheiber, Daniel
name: Zhou, Xuyang
name: Gault, Baptiste
name: Liebscher, Christian H.
name: Romaner, Lorenz
name: Dehm, Gerhard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The local variation of grain boundary atomic structure and chemistry caused by segregation of impurities influences the macroscopic properties of poylcrystalline materials. Here, the effect of co-segregation of carbon and boron on the depletion of aluminum at a $Σ5\,(3\,1\,0\,) [0\,0\,1]$ tilt grain boundary in a $α-$Fe-$4~at.~\%$Al bicrystal was studied by combining atomic resolution scanning transmission electron microscopy, atom probe tomography and density functional theory calculations. The atomic grain boundary structural units mostly resemble kite-type motifs and the structure appears disrupted by atomic scale defects. Atom probe tomography reveals that carbon and boron impurities are co-segregating to the grain boundary reaching levels of >1.5 at.\%, whereas aluminum is locally depleted by approx. 2~at.\%. First-principles calculations indicate that carbon and boron exhibit the strongest segregation tendency and their repulsive interaction with aluminum promotes its depletion from the grain boundary. It is also predicted that substitutional segregation of boron atoms may contribute to local distortions of the kite-type structural units. These results suggest that the co-segregation and interaction of interstitial impurities with substitutional solutes strongly influences grain boundary composition and with this the properties of the interface.
description: 26 pages, 10 Figures, 1 Table
Green function formalism for resonant interaction of x-rays with nuclei in structured media
Creators: name: Kong, Xiangjin
name: Chang, Darrick E.
name: Pálffy, Adriana
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The resonant interaction between x-ray photons and nuclei is one of the most exciting subjects of the burgeoning field of x-ray quantum optics. A resourceful platform used so far are thin-film x-ray cavities with embedded layers or Mössbauer nuclei such as $^{57}\mathrm{Fe}$. A new quantum optical model based on the classical electromagnetic Green's function is developed to investigate theoretically the nuclear response inside the x-ray cavity. The model is versatile and provides an intuitive picture about the influence of the cavity structure on the resulting spectra. We test its predictive powers with the help of the semiclassical coherent scattering formalism simulations and discuss our results for increasing complexity of layer structures.
description: 11 pages, 6 figures
Measuring and testing dependence by correlation of distances
Creators: name: Székely, Gábor J.
name: Rizzo, Maria L.
name: Bakirov, Nail K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G10 (Primary) 62H20 (Secondary)

description: Distance correlation is a new measure of dependence between random vectors. Distance covariance and distance correlation are analogous to product-moment covariance and correlation, but unlike the classical definition of correlation, distance correlation is zero only if the random vectors are independent. The empirical distance dependence measures are based on certain Euclidean distances between sample elements rather than sample moments, yet have a compact representation analogous to the classical covariance and correlation. Asymptotic properties and applications in testing independence are discussed. Implementation of the test and Monte Carlo results are also presented.
description: Published in at http://dx.doi.org/10.1214/009053607000000505 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
The Beale-Kato-Majda criterion to the 3D Magneto-hydrodynamics equations
Creators: name: Chen, Qionglei
name: Miao, Changxing
name: Zhang, Zhifei
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 76W05, 35B65

description: We study the blow-up criterion of smooth solutions to the 3D MHD equations. By means of the Littlewood-Paley decomposition, we prove a Beale-Kato-Majda type blow-up criterion of smooth solutions via the vorticity of velocity only, i. e. $\sup_{j\in\Z}\int_0^T\|Δ_j(\na\times u)\|_\infty dt$, where $Δ_j$ is a frequency localization on $|ξ|\approx 2^j$.
description: 12pages
Multimedia innovation in higher education : An exploratory case study
Creators: name: Ajayi, Ajibola O.
Publisher: name: University of British Columbia
Year: 2009

description: This study investigated a professor's first attempt at incorporating multimedia technology as an instructional tool in a first-year level Astronomy course at the University of British Columbia. The issues explored were the kinds of planning, organization, and implementation that were undertaken, as well as the effects of the technology on teaching and learning. A qualitative case study research methodology was employed in this investigation. The theoretical frame that informed the study was a holistic world view of education. The analyzed records consist of fieldnotes and videotaped records of the planning stages, observations, tutorial and lecture sessions, and interviews with the instructor and four volunteer students. The emergent issues were categorized into two major themes, practical and pedagogical issues. Issues of convenience, technical knowledge, software and time were four categories identified within the practical theme. Interest and motivation, and concept development were the two categories identified within the pedagogical theme. Recommendations for the successful implementation of multimedia technology as an instructional tool arising from the analysis of these six categories are provided.
NICER Observation of the Temporal and Spectral Evolution of Swift J1818.0-1607: a Missing Link between Magnetars and Rotation Powered Pulsars
Creators: name: Hu, Chin-Ping
name: Begicarslan, Beste
name: Guver, Tolga
name: Enoto, Teruaki
name: Younes, George
name: Sakamoto, Takanori
name: Ray, Paul S.
name: Strohmayer, Tod E.
name: Guillot, Sebastien
name: Arzoumanian, Zaven
name: Palmer, David M.
name: Gendreau, Keith C.
name: Malacaria, C.
name: Wadiasingh, Zorawar
name: Jaisawal, Gaurava K.
name: Majid, Walid A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the hard X-ray burst and the first ~100 days NICER monitoring of the soft X-ray temporal and spectral evolution of the newly-discovered magnetar Swift J1818.0-1607. The burst properties are typical of magnetars with a duration of $T_{90}=10\pm4$ ms and a temperature of $kT=8.4\pm0.7$ keV. The 2--8 keV pulse shows a broad, single peak profile with a pulse fraction increasing with time from 30% to 43%. The NICER observations reveal strong timing noise with $\dotν$ varying erratically by a factor of 10, with an average long-term spin-down rate of $\dotν=(-2.48\pm0.03)\times10^{-11}$~s$^{-2}$, implying an equatorial surface magnetic field of $2.5\times10^{14}$ G and a young characteristic age of $\sim$470 yr. We detect a large spin-up glitch at MJD 58928.56 followed by a candidate spin-down glitch at MJD 58934.81, with no accompanying flux enhancements. The persistent soft X-ray spectrum of Swift~J1818.0-1607 can be modeled as an absorbed blackbody with a temperature of ~1 keV. Its flux decayed by ~60% while the modeled emitting area decreased by ~30% over the NICER observing campaign. This decrease, coupled with the increase in the pulse fraction points to a shrinking hot spot on the neutron star surface. Assuming a distance of 6.5 kpc, we measure a peak X-ray luminosity of $1.9\times10^{35}$ erg/s, lower than its spin-down luminosity of $7.2\times10^{35}$ erg/s. Its quiescent thermal luminosity is $\lesssim 1.7\times10^{34}$ erg/s, lower than those of canonical young magnetars. We conclude that Swift J1818.0-1607 is an important link between regular magnetars and high magnetic field rotation powered pulsars.
description: 13 pages, 4 figures, 2tables, accepted for publication in ApJ
Automation of application-level caching in a seamless way
Creators: name: Mertz, Jhonny
name: Nunes, Ingrid
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Meeting performance and scalability requirements while delivering services is a critical issue in web applications. Recently, latency and cost of Internet-based services are encouraging the use of application-level caching to continue satisfying users' demands and improve the scalability and availability of origin servers. Application-level caching, in which developers manually control cached content, has been adopted when traditional forms of caching are insufficient to meet such requirements. Despite its popularity, this level of caching is typically addressed in an ad hoc way, given that it depends on specific details of the application. Furthermore, it forces application developers to reason about a crosscutting concern, which is unrelated to the application business logic. As a result, application-level caching is a time-consuming and error-prone task, becoming a common source of bugs. Among all the issues involved with application-level caching, the decision of what should be cached must frequently be adjusted to cope with the application evolution and usage, making it a challenging task. In this paper, we introduce an automated caching approach to automatically identify application-level cache content at runtime by monitoring system execution and adaptively managing caching decisions. Our approach is implemented as a framework that can be seamlessly integrated into new and existing web applications. In addition to the reduction of the effort required from developers to develop a caching solution, an empirical evaluation showed that our approach significantly speeds up and improves hit ratios with improvements ranging from 2.78% to 17.18%.
Generation of spin current by Coulomb drag
Creators: name: Pustilnik, M.
name: Mishchenko, E. G.
name: Starykh, O. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Coulomb drag between two quantum wires is exponentially sensitive to the mismatch of their electronic densities. The application of a magnetic field can compensate this mismatch for electrons of opposite spin directions in different wires. The resulting enhanced momentum transfer leads to the conversion of the charge current in the active wire to the spin current in the passive wire.
Large Deviations of Extreme Eigenvalues of Random Matrices
Creators: name: Dean, David S.
name: Majumdar, Satya N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We calculate analytically the probability of large deviations from its mean of the largest (smallest) eigenvalue of random matrices belonging to the Gaussian orthogonal, unitary and symplectic ensembles. In particular, we show that the probability that all the eigenvalues of an (N\times N) random matrix are positive (negative) decreases for large N as \exp[-βθ(0) N^2] where the parameter βcharacterizes the ensemble and the exponent θ(0)=(\ln 3)/4=0.274653... is universal. We also calculate exactly the average density of states in matrices whose eigenvalues are restricted to be larger than a fixed number ζ, thus generalizing the celebrated Wigner semi-circle law. The density of states generically exhibits an inverse square-root singularity at ζ.
description: 4 pages Revtex, 4 .eps figures included, typos corrected, published version
Design and Simulation of Voltage Amplidyne System using Robust Control Technique
Creators: name: Jibril, Mustefa
name: Tadese, Messay
name: Tadese, Eliyas Alemayehu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, modelling designing and simulation of a simple voltage amplidyne system is done using robust control theory. In order to increase the performance of the voltage amplidyne system with H optimal control synthesis and H optimal control synthesis via-iteration controllers are used. The open loop response of the voltage amplidyne system shows that the system can amplify the input 7 times. Comparison of the voltage amplidyne system with H optimal control synthesis and H optimal control synthesis via-iteration controllers to track a desired step input have been done. Finally, the comparative simulation results prove the effectiveness of the proposed voltage amplidyne system with H optimal control synthesis controller in improving the percentage overshoot and the settling time.
Statistics of SU(5) D-Brane Models on a Type II Orientifold
Creators: name: Gmeiner, Florian
name: Stein, Maren
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We perform a statistical analysis of models with SU(5) and flipped SU(5) gauge group in a type II orientifold setup. We investigate the distribution and correlation of properties of these models, including the number of generations and the hidden sector gauge group. Compared to the recent analysis hep-th/0510170 of models with a standard model-like gauge group, we find very similar results.
description: 4 pages, 7 figures, revtex; v2: version to be published in prd, minor extension of flipped SU(5) discussion, plots updated