cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Thermal lensing-induced soliton molecules in beta-phase Gallium Oxide
Creators: name: Dikandé, Alain M.
name: Aban, E. Chenui
name: Sunda-Meya, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In recent years, beta gallium oxide (beta-\ce{Ga2O3}) has become the most investigated isomorph of gallium oxide polymorphs, due to the great potential it represents for applications in optoelectronics and photonics for solar technology, particularly in blind ultraviolet photodetector solar cells (SBUV) designs. To optimize its use in these applications, and to identify possible new features, knowledge of its fundamental properties is relevant. In this respect, optical, thermal and electronic properties of beta-\ce{Ga2O3} have been studied expriementally, providing evidence of a wide-band inorganic and transparent semiconductor with a Kerr nonlinearity. Thermo-optical properties of the material, probed in SBUV sensing experiments, have highlighted a sizable heat diffusion characterized by a temperature gradient along the path of optical beams, quadratic in beam position and promoting a refractive-index change with temperature. The experimentally observed Kerr nonlinearity together with the thermally induced birefringence, point unambiguously to a possible formation of soliton molecules during propagation of high-intensity fields in beta-\ce{Ga2O3}. To put this conjecture on a firm ground we propose a theoretical analysis, based on the cubic nonlinear Schroedinger equation in 1+1 spatial dimension, in which thermal lensing creates an effective potential quadratic in the coordinate of beam position. Using the non-isospectral inverse-scattering transform method, the exact one-soliton solution to the propagation equation is obtained. This solution features a bound state of entangled pulses forming a soliton molecule, in which pulses are more or less entangled depending on characteristic parameters of the system.
description: 8 pages, 3 figures
Εφαρμογές κινητών τηλεφώνων για καταστάσεις κινδύνου/ έκτακτης ανάγκης - Πιλοτική ανάπτυξη σχετικής εφαρμογής: “Look App 4 Me!:
Creators: name: Παγώνης, Νικόλαος Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Εφαρμογή έκτακτης ανάγκης
Εντοπισμός θέσης
Εφαρμογή κινδύνου
Emergency application
GPS
Location-based application

description: Σκοπός της διατριβής ήταν η ανάπτυξη πιλοτικής εφαρμογής για μία κατάσταση έκτακτης ανάγκης. Αρχικά, εξετάσαμε τις τεχνολογίες που χρησιμοποιήθηκαν για τον εντοπισμό θέσης και την ανάπτυξη του λογισμικού μέσα από την πλατφόρμα του Android. Στη συνέχεια, παρουσιάσαμε συνοπτικά ενδεικτικές υπάρχουσες εφαρμογές σε κατηγοριοποιημένη μορφή για διάφορες καταστάσεις κινδύνου συνοδευόμενες από εικόνες. Η παρουσίαση αυτή αποτέλεσε μία ιδανική εισαγωγή στην παρουσίαση της εφαρμογής που αναπτύχθηκε στα πλαίσια της παρούσας εργασίας. Η εφαρμογή «Look App 4 Me!» αποτελεί ένα εργαλείο για το χρήστη που θα τον βοηθήσει να γνωστοποιήσει τη γεωγραφική του θέση σε καθορισμένους από εκείνον παραλήπτες, με το πάτημα ενός κουμπιού και μόνο. Μαζί με τη λειτουργία της λοιπόν, παρουσιάζεται επίσης η φιλοσοφία που οδήγησε στην ιδέα και το σκεπτικό που οδήγησε στην τελική μορφή της εφαρμογής. Η εργασία καταλήγει με συμπεράσματα που προέκυψαν από την έρευνα και μερικές προτάσεις επέκτασης της συγκεκριμένης εφαρμογής για το μέλλον, προκειμένου να αυξηθεί η λειτουργικότητά της.
description: The aim of the present thesis was to develop a pilot application for mobile phones to be used in case of an emergency. Initially, we examined the technologies used for positioning and the software development through the Android platform. Then, indicative existing applications were briefly presented categorized for different risk situations along with images. The presentation of these applications was an ideal introduction to the presentation of the application that was developed for the present dissertation. The application “Look App 4 Me!” is a tool that is going to help the user notify designated recipients about his geographical position, with just a single touch of a button. Furthermore, along with its function, the philosophy that led to the idea and the rationale that led to the final form of the application are also presented. The thesis ends up with conclusions and some suggestions for future expansion, in order to increase the application’s efficiency.
Η ρυμοτομική απαλλοτρίωση και η σχέση της με την αναγκαστική απαλλοτρίωση.:
Creators: name: Κατηρτζόγλου, Μαγδαληνή Χαραλάμπους
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: ρυμοτομική
απαλλοτρίωση
σχέδιο πόλεως
real property
expropriation
urban planning

description: Σκοπός της παρούσας εισήγησης είναι η παρουσίαση της έννοιας και της διαδικασίας εξέλιξης της ρυμοτομικής απαλλοτρίωσης ακινήτων στην Ελλάδα, όπως αυτή διαμορφώθηκε από την πολεοδομική νομοθεσία και τη νομολογία των πολιτικών και διοικητικών δικαστηρίων, καθώς και η σχέση της με την αναγκαστική απαλλοτρίωση ακινήτων. Αναπτύσσεται η διαδικασία κήρυξης και συντέλεσής της καθώς και το περιεχόμενο, ο τρόπος και οι προϋποθέσεις υπό τις οποίες χορηγείται η αποζημίωση στον ιδιοκτήτη του απαλλοτριούμενου ακινήτου. Παραπέρα περιγράφεται τόσο η διαδικασία της αυτοδίκαιης άρσης της ρυμοτομικής απαλλοτρίωσης, λόγω μη συντέλεσής της στα χρονικά πλαίσια, που τάσσει το Σύνταγμα και η σχετική νομοθεσία όσο και η ανάκληση μη συντελεσμένης ρυμοτομικής απαλλοτρίωσης καθώς και η, συνεπεία αυτών, πράξη τροποποίησης του ρυμοτομικού σχεδίου. Ακόμη γίνεται αναφορά στις προϋποθέσεις επανεπιβολής της ρυμοτομικής απαλλοτρίωσης αλλά και στις περιπτώσεις ανάκλησης αυτής αφού έχει συντελεστεί. Οι προαναφερθείσες διαδικασίες αναλύονται σε συσχετισμό με τις αντίστοιχες της αναγκαστικής απαλλοτρίωσης, όταν υφίστανται μεταξύ τους διαφορές, ενώ τέλος απαριθμούνται και μελετώνται τα ένδικα βοηθήματα, που ασκούνται στα αρμόδια δικαστήρια, για την επίλυση των διαφορών, που γεννώνται στα διάφορα στάδια εξέλιξης της κάθε διαδικασίας της ρυμοτομικής απαλλοτρίωσης καθώς και τα δικονομικά ζητήματα, που ενδεχομένως προκύπτουν.
description: The purpose of this study is to present the concept and the evolution of real property expropriation for urban planning purposes (from now on mentioned as expropriation for brevity΄s sake) as it was molded by the planning legislation and the case law of civil and administrative courts. The procedure of declaring and concluding the expropriation is presented as well as the content, the manner and the conditions under which compensation is paid to the owner involved (the owner of the expropriated real property). Furthermore the procedure of ipso jure lifting of the expropriation is described, in the event that it is not concluded within the time limits provided by the Constitution and the relevant legislation and also the revocation of a non concluded expropriation and the resultant modification of the urban plan. The conditions of re - imposing the expropriation and the cases of revoking it after being concluded are mentioned. The aforementioned procedures are presented in comparison to those of the compulsory expropriation for other (than urban planning) purposes, where there are differences between the two. Finally, the legal remedies before the competent courts are recited and studied, concerning the settlement of disputes raised during the various stages of the expropriation procedure, as well as the arising questions of procedure before courts.
ความชุกและปัจจัยเสี่ยงในการติดเชื้อเอชไอวีและซิฟิลิสในแรงงานข้ามชาติ ในอำเภอตะกั่วป่า จังหวัดพังงา
Creators: name: อภิษฎา รัศมี
Publisher: name: กองนวัตกรรมและวิจัย กรมควบคุมโรค
Year: 2562
Subjects: ซิฟิลิส
การติดเชื้อเอชไอวี
ความชุก
ปัจจัยเสี่ยงทางเพศ
แรงงานข้ามชาติ

description: วารสารควบคุมโรค, 45, 1, 75-84
Spectrum oscillations from features in the potential of single-field inflation
Creators: name: Dalianis, I.
name: Kodaxis, G. P.
name: Stamou, I. D.
name: Tetradis, N.
name: Tsigkas-Kouvelis, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study single-field inflationary models with steep step-like features in the potential that lead to the temporary violation of the slow-roll conditions during the evolution of the inflaton. These features enhance the power spectrum of the curvature perturbations by several orders of magnitude at certain scales and also produce prominent oscillatory patterns. We study analytically and numerically the inflationary dynamics. We describe quantitatively the size of the enhancement, as well as the profile of the oscillations, which are shaped by the number and position of the features in the potential. The induced tensor power spectrum inherits the distinctive oscillatory profile of the curvature spectrum and is potentially detectable by near-future space interferometers. The enhancement of the power specrtum by step-like features, though significant, may be insufficient to trigger the production of a sizeable number of primordial black holes if radiation dominates the energy density of the early universe. However, it can result in sufficient black hole production if the universe is dominated by non-relativistic matter. For the latter scenario, we find that deviations from the standard monochromatic profile of the mass spectrum of primordial black holes are possible because of the multiple-peak structure of the curvature power spectrum.
description: 37 pages, 14 figures. Journal Version
ผลของการพัฒนาระบบเฝ้าระวังควบคุมป้องกันโรคติดต่อและโรคอุบัติใหม่ ตามแนวชายแดนประเทศไทย-เมียนมา-สาธารณรัฐประชาธิปไตยประชาชนลาว จังหวัดเชียงราย ปี 2560-2561
Creators: name: เสาวณีย์ เปลี่ยนพานิช
Publisher: name: กองนวัตกรรมและวิจัย กรมควบคุมโรค
Year: 2562
Subjects: โรคติดต่อ โรคอุบัติใหม่
งานสาธารณสุขชายแดน

description: วารสารควบคุมโรค, 45, 1, 85-96
Method Development and Validation of Pregabalin in Bulk and Tablet Dosage forms by UV Spectroscopy
Creators: name: A.Raja Reddy, L. Noel Shepherd, T.Rama Rao
Publisher: name: Zenodo
Year: 2024

description: For determining Pregabalin in bulk and pharmaceutical formulations, a straightforward and accurate UVspectrophotometric method was created and verified. Distilled water was used as the solvent in the estimation. It wasdetermined that the absorbance was 210 nm. A correlation coefficient of 0.997 indicated that the method's range waslinear, between 2 and 10 μg/ml. 98.12–101.17% was the recovery rate determined. There was less than a 2-foldrelative standard deviation found. Assay, robustness, ruggedness, quantitation limit, accuracy, and precision were allevaluated in the validation process. It has been discovered that this UV spectrophotometric approach isstraightforward, exact, accurate, repeatable, and reasonably priced. In the bulk and pharmaceutical formulationssectors, the method can be helpful for routine daily analysis carried out by quality control departments.
Torsion of SU(2)-structures and Ricci curvature in dimension 5
Creators: name: Bedulli, Lucio
name: Vezzoni, Luigi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C10, 53C25, 53C15, 53D15

description: In anlogy with the work of R. Bryant on the Ricci tensor of a G$_2$-structure, we study the intrinsic torsion of an SU$(2)$-structure on a 5-dimensional manifold deriving an explicit expression for the Ricci and the scalar curvature in terms of torsion forms and its derivative. As a consequence of this formula we prove that the $α$-Einstein condition forces some special SU(2)-structures to be Sasaki-Einstein.
description: 18 pages, The main formula has been corrected
title: “I know few people who seem so qualified to do so…” A Letter of Recommendation for Siegfried Landshut
Creators: name: Gerlach, Lisa
Publisher: name: Institute for the History of the German Jews
Year: 2019
Subjects: subject: Scholarship
subject: Antisemitism and Persecution

description: Letters of recommendation combine the personal micro-level with the macro-level of social habits and circumstances in a given time period. This two-page letter of March 5, 1936 for the sociologist Siegfried Landshut which his former supervisor Eduard Heimann sent from his New York exile to [Hans] Kohn in order to help Landshut get a position at the Hebrew University clearly illustrates this combination. The letter opens with a short introduction and then turns to Siegfried Landshut’s curriculum vitae. Landshut, born in 1897 in Strasbourg in Alsace, began his studies after his voluntary service in the First World War. After briefly describing Landshut’s life and studies, Heimann proceeds to explain his relation with Landshut, who had been Eduard Heimann's research assistant at the sociological faculty at Hamburg University since 1927. The letter also describes how Landshut lost his employment at Hamburg University and then embarked on an international odyssey with his family that, according to Heimann, ended in Cairo in disastrous circumstances. In Siegfried Landshut's case, this letter helped significantly in getting him temporary employment at the Hebrew University. In a very personal and immediate way it reveals not only how National Socialism interrupted careers and lives at German universities, but it also sheds light on the networks within which letters of recommendation were written, which migration paths Jews followed, how being Jewish was relevant in professional contexts and the argumentative space friendship and a sense of responsibility occupy in such letters.
Modeling time delays in the X-ray spectrum of the Seyfert galaxy MCG-6-30-15
Creators: name: Goosmann, R. W.
name: Czerny, B.
name: Karas, V.
name: Ponti, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose a reflection model of the time delays detected during an exceptionally bright, single flare in MCG-6-30-15. We consider a scenario in which the delays of the hard X-rays with respect to the soft X-rays are caused by the presence of the delayed reflection component. We employ a model of the flare, which is accompanied by reprocessed emission. We consider two geometries/thermal states of the reprocessing medium: a partially ionized accretion disk surface and a distribution of magnetically confined, cold blobs. The reprocessing by cold blobs predicts positive time delays and a saturation in the time delay -- energy relation, which is likely present in the data. The model requires a strong reflection component and relies on the apparent pivoting of the combined primary and reflected spectrum. The reflection by the ionized disk surface does not reproduce the observed delays. We discuss the relation between the two reflection scenarios and argue that they are both present in MCG-6-30-15.
description: 11 pages, 8 figures, accepted by Astronomy & Astrophysics
Additional file 1 of Curcumin inhibits the migration of osteoclast precursors and osteoclastogenesis by repressing CCL3 production
Creators: name: Liang, Zhengeng
name: Xue, Yan
name: Wang, Tao
name: Xie, Qi
name: Lin, Jiafu
name: Wang, Yu
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer

description: Additional file 1.
Climate change projects and youth engagement: Empowerment and contested knowledge.
Creators: name: STAVRIANAKIS, KOSTAS
name: A. E. Nielsen, Jacob
name: Morrison, Zoe
Publisher: name: Zenodo
Year: 2025

description: This study investigated youths’ empowerment through EU-funded climate change projects (CCPs) and the role that social research and public engagement through environmental education have in that process. The importance of considering youth empowerment in a time of climate change is increasingly recognised. Youths are exposed to interrelated health, social, economic, and political vulnerabilities caused by climate change, but they often have limited resources to address and navigate these changes. To help address these issues youth empowerment holds the potential to give youth a greater influence over their life in the context of evolving climate change. EU-funded CCPs play a crucial role in EU’s climate mitigation and adaptation policies, while the implementation of these projects can have widespread implications for youth across the EU. However, despite this, there is little research that explores the local youth implications of EU-funded CCPs and how they engage with such projects. In this paper, we begin addressing this knowledge gap by exploring how youth empowerment was facilitated, shaped, and restrained over a year-long collaboration with 15-year-old school students in Greece.  This collaboration was within the context of an EU Horizon 2020 project on social acceptance of Carbon Capture and Utilisation (CCUS) technologies. This school engagement was based on a series of workshops, including a role-playing game and a session of a PlayDecide game on climate change. The findings indicate that the activities provided the students with opportunities to explore and express different types of concerns, knowledges and perspectives on issues related to climate change, social acceptance and CCUS technologies. However, the empowering potential of these activities was also shaped by power differentials and contestations around what types of knowledge matter and the source of that knowledge.
Kinks in the dispersion of strongly correlated electrons
Creators: name: Byczuk, K.
name: Kollar, M.
name: Held, K.
name: Yang, Y. -F.
name: Nekrasov, I. A.
name: Pruschke, Th.
name: Vollhardt, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The properties of condensed matter are determined by single-particle and collective excitations and their interactions. These quantum-mechanical excitations are characterized by an energy E and a momentum \hbar k which are related through their dispersion E_k. The coupling of two excitations may lead to abrupt changes (kinks) in the slope of the dispersion. Such kinks thus carry important information about interactions in a many-body system. For example, kinks detected at 40-70 meV below the Fermi level in the electronic dispersion of high-temperature superconductors are taken as evidence for phonon or spin-fluctuation based pairing mechanisms. Kinks in the electronic dispersion at binding energies ranging from 30 to 800 meV are also found in various other metals posing questions about their origins. Here we report a novel, purely electronic mechanism yielding kinks in the electron dispersions. It applies to strongly correlated metals whose spectral function shows well separated Hubbard subbands and central peak as, for example, in transition metal-oxides. The position of the kinks and the energy range of validity of Fermi-liquid (FL) theory is determined solely by the FL renormalization factor and the bare, uncorrelated band structure. Angle-resolved photoemission spectroscopy (ARPES) experiments at binding energies outside the FL regime can thus provide new, previously unexpected information about strongly correlated electronic systems.
description: 8 pages, 5 figures
Next-to-Next-to-Leading-Order QCD Prediction for the Photon-Pion Form Factor
Creators: name: Gao, Jing
name: Huber, Tobias
name: Ji, Yao
name: Wang, Yu-Ming
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We accomplish the complete two-loop computation of the leading-twist contribution to the photon-pion transition form factor $γ\, γ^{\ast} \to π^0$ by applying the hard-collinear factorization theorem together with modern multi-loop techniques. The resulting predictions for the form factor indicate that the two-loop perturbative correction is numerically important. We also demonstrate that our results will play a key role in disentangling various models of the twist-two pion distribution amplitude thanks to the envisaged precision at Belle II.
description: Published version in Physical Review Letters. Coefficient functions in the electronic form are given in the ancillary file
AGN Jet Mass Loading and Truncation by Stellar Winds
Creators: name: Hubbard, Alexander
name: Blackman, Eric G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Active Galactic Nuclei can produce extremely powerful jets. While tightly collimated, the scale of these jets and the stellar density at galactic centers implies that there will be many jet/star interactions, which can mass-load the jet through stellar winds. Previous work employed modest wind mass outflow rates, but this does not apply when mass loading is provided by a small number of high mass-loss stars. We construct a framework for jet mass-loading by stellar winds for a broader spectrum of wind mass-loss rates than has been previously considered. Given the observed stellar mass distributions in galactic centers, we find that even highly efficient (0.1 Eddington luminosity) jets from supermassive black holes of masses $M_{BH} \la 10^4M_{\odot}$ are rapidly mass loaded and quenched by stellar winds. For $10^4 M_{\odot}
description: 13 pages, 2 figures
Global attractors for Cahn-Hilliard equations with non constant mobility
Creators: name: Schimperna, Giulio
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 35K55, 35B41, 35B45

description: We address, in a three-dimensional spatial setting, both the viscous and the standard Cahn-Hilliard equation with a nonconstant mobility coefficient. As it was shown in J.W. Barrett and J.W. Blowey, Math. Comp., 68 (1999), 487-517, one cannot expect uniqueness of the solution to the related initial and boundary value problems. Nevertheless, referring to J. Ball's theory of generalized semiflows, we are able to prove existence of compact quasi-invariant global attractors for the associated dynamical processes settled in the natural "finite energy" space. A key point in the proof is a careful use of the energy equality, combined with the derivation of a "local compactness" estimate for systems with supercritical nonlinearities, which may have an independent interest. Under growth restrictions on the configuration potential, we also show existence of a compact global attractor for the semiflow generated by the (weaker) solutions to the nonviscous equation characterized by a "finite entropy" condition.
Catalytic Transformations of Pure Entangled States
Creators: name: Kondra, Tulja Varun
name: Datta, Chandan
name: Streltsov, Alexander
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum entanglement of pure states is usually quantified via the entanglement entropy, the von Neumann entropy of the reduced state. Entanglement entropy is closely related to entanglement distillation, a process for converting quantum states into singlets, which can then be used for various quantum technological tasks. The relation between entanglement entropy and entanglement distillation has been known only for the asymptotic setting, and the meaning of entanglement entropy in the single-copy regime has so far remained open. Here we close this gap by considering entanglement catalysis. We prove that entanglement entropy completely characterizes state transformations in the presence of entangled catalysts. Our results imply that entanglement entropy quantifies the amount of entanglement available in a bipartite pure state to be used for quantum information processing, giving asymptotic results an operational meaning also in the single-copy setup.
description: 5+2 pages, 2 figures. Accepted for publication in Physical Review Letters
Efficient evaluation of the Fourier Transform over products of Slater-type orbitals on different centers
Creators: name: Niehaus, T. A.
name: López, R.
name: Rico, J. F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using the shift-operator technique, a compact formula for the Fourier transform of a product of two Slater-type orbitals located on different atomic centers is derived. The result is valid for arbitrary quantum numbers and was found to be numerically stable for a wide range of geometrical parameters and momenta. Details of the implementation are presented together with benchmark data for representative integrals. We also discuss the assets and drawbacks of alternative algorithms available and analyze the numerical efficiency of the new scheme.
description: Revised version
Υποκειμενική ευημερία: μια βιβλιογραφική επισκόπηση:
Creators: name: Ουζούνη, Αικατερίνη Αγγελου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Υποκειμενική ευημερία
Ικανοποίηση από τη ζωή
Ευτυχία
Subjective well-being
Life satisfaction
Happiness

description: Τι κάνει τους ανθρώπους ευτυχισμένους; Το βασικό αυτό ερώτημα που παραδοσιακά απασχόλησε την επιστήμη της ψυχολογίας, τα τελευταία πενήντα περίπου χρόνια συνδέθηκε και με την οικονομική επιστήμη. Η αποσύνδεση της έννοιας της Ευημερίας (Well-Being) από τη στενή, μέχρι πρόσφατα, σχέση της με την οικονομική ανάπτυξη και η διαπίστωση πως ο δείκτης του Ακαθάριστου Εγχώριου Προϊόντος δεν αποτελεί επαρκές μέτρο της Ευημερίας (Well-Being) των ατόμων, συνιστούν τους σημαντικότερους λόγους που η Ευημερία έχει προσελκύσει το ενδιαφέρον των οικονομολόγων και οδηγούν στην έρευνα για τον καθορισμό των παραγόντων οι οποίοι την επηρεάζουν. Η παρούσα εργασία στο πρώτο κεφάλαιο ορίζει την εννοιολογική σημασία της Ευημερίας και των διάφορων διαστάσεων της (Subjective Well-Being) καθώς και τις σημαντικότερες διαφορές τους. Στο δεύτερο κεφάλαιο, η εργασία επικεντρώνεται στην επισκόπηση της βιβλιογραφίας για την Υποκειμενική Ευημερία και ιδιαίτερα στους παράγοντες, τόσο σε επίπεδο χώρας όσο και σε ατομικό επίπεδο, που την επηρεάζουν. Στο τρίτο κεφάλαιο αναλύονται οι τρόποι μέτρησης της Υποκειμενικής Ευημερίας (Subjective Well-Being). Τέλος, στο τέταρτο κεφάλαιο παρουσιάζονται τα συμπεράσματα της παρούσας εργασίας και κάποιες προτάσεις πολιτικής και μελλοντικής έρευνας.
description: What makes people happy? This basic question that traditionally occupied the science of psychology, was connected with the economics only the last fifty years. The disconnection of the notion of Well-Being from its dependence on economic development and the fact that the Gross Domestic Product is not an adequate measure of Well-Being, constitute the major reasons why Well-Being has attracted the attention of economists and has led to the investigation of the factors that influence it. The first chapter of this paper defines the conceptual meaning of Well-Being and its different dimensions as well as the major differences between them. The second chapter focuses on the literature review of subjective Well-being and particularly on the factors, both at country and at individual level, that influence it. The third chapter analyzes the measures of subjective Well-being. Finally, the fourth chapter presents the conclusions of this paper and recommendations for policy and future research.
Canonical self-affine tilings by iterated function systems
Creators: name: Pearse, Erin P. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Metric Geometry (math.MG)
subject: Dynamical Systems (math.DS)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 28A80, 28A75, 52A20, 52C22 (Primary), 49Q15, 51F99, 51M20, 51M25, 52A22, 52A38, 52A39, 53C65 (Secondary)

description: An iterated function system $Φ$ consisting of contractive similarity mappings has a unique attractor $F \subseteq \mathbb{R}^d$ which is invariant under the action of the system, as was shown by Hutchinson [Hut]. This paper shows how the action of the function system naturally produces a tiling $\mathcal{T}$ of the convex hull of the attractor. More precisely, it tiles the complement of the attractor within its convex hull. These tiles form a collection of sets whose geometry is typically much simpler than that of $F$, yet retains key information about both $F$ and $Φ$. In particular, the tiles encode all the scaling data of $Φ$. We give the construction, along with some examples and applications. The tiling $\mathcal{T}$ is the foundation for the higher-dimensional extension of the theory of \emph{complex dimensions} which was developed for the case $d=1$ in ``Fractal Geometry, Complex Dimensions, and Zeros of Zeta Functions,'' by Michel L. Lapidus and Machiel van Frankenhuijsen.
description: 16 pages, 8 figures, referee comments incorporated, new counterexample
Outflows of very ionized gas in the center of Seyfert galaxies: kinematics and physical conditions
Creators: name: Rodriguez-Ardila, Alberto
name: Prieto, M. A.
name: Viegas, S.
name: Gruenwald, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Mid-resolution spectra are used to deduce the size and kinematics of the coronal gas in a sample of Seyfert galaxies by means of observations of the [FeXI], [FeX], [FeVII], [SiVI] and [SiVII] lines. These coronal lines (CL) extend from the unresolved nucleus up to a few tens to a few hundreds of parsecs. The region of the highest ionized ions studied, [FeXI] and [FeX], is the least spatially extended, and concentrates at the center; intermediate ionization lines extend from the nucleus up to a few tens to a few hundred parsecs; lower [OIII]-like ions are known to extendin the kpc range. All together indicates a stratification in the ionized gas, usually interpreted in terms of nuclear photoionization as the driving ionization mechanism. However, CL profiles show various peculiarities: they are broader by a factor of two than lower ionization lines, the broadening being in terms of asymmetric blue wings, and their centroid position at the nucleus is blueshifted by a few hundreds of km/s. Moreover, in NGC1386 and NGC1068, a double peak [FeVII] line is detected in the nuclear and extended coronal region, this being the first report in of such type of profile in CL in active galactic nuclei. If interpreted as outflow signatures, the total broadening of the lines at zero intensity levels implies gas velocities up to 2000 km/s. Although the stratification of ions across the coronal region means that photoionization is the main power mechanism, the high velocities deduced from the profiles, the relatively large spatial extension of the emission, and the results from photoionization models indicate that an additional mechanism is at work. We suggest that shocks generated by the outflow could provide the additional required power for line formation.
description: Accepted for publication in the Astrophysical Journal. 40 pages, 15 figures. Minor changes made on the affiliation of one co-author
Angle-resolved photoemission spectroscopy of band tails in lightly doped cuprates
Creators: name: Alexandrov, A. S.
name: Reynolds, K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We amend ab initio strongly-correlated band structures by taking into account the band-tailing phenomenon in doped charge-transfer Mott-Hubbard insulators. We show that the photoemission from band tails accounts for sharp "quasi-particle" peaks, rapid loss of their intensities in some directions of the Brillouin zone ("Fermi-arcs") and high-energy "waterfall" anomalies as a consequence of matrix-element effects of disorder-localised states in the charge-transfer gap of doped cuprates.
description: 4 pages, 4 figures
A Late-Time Galaxy-Targeted Search for the Radio Counterpart of GW190814
Creators: name: Alexander, K. D.
name: Schroeder, G.
name: Paterson, K.
name: Fong, W.
name: Cowperthwaite, P.
name: Gomez, S.
name: Margalit, B.
name: Margutti, R.
name: Berger, E.
name: Blanchard, P.
name: Chornock, R.
name: Eftekhari, T.
name: Laskar, T.
name: Metzger, B. D.
name: Nicholl, M.
name: Villar, V. A.
name: Williams, P. K. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: GW190814 was a compact object binary coalescence detected in gravitational waves by Advanced LIGO and Advanced Virgo that garnered exceptional community interest due to its excellent localization and the uncertain nature of the binary's lighter-mass component (either the heaviest known neutron star, or the lightest known black hole). Despite extensive follow up observations, no electromagnetic counterpart has been identified. Here we present new radio observations of 75 galaxies within the localization volume at $Δt\approx 35-266$ days post-merger. Our observations cover $\sim32$% of the total stellar luminosity in the final localization volume and extend to later timescales than previously-reported searches, allowing us to place the deepest constraints to date on the existence of a radio afterglow from a highly off-axis relativistic jet launched during the merger (assuming that the merger occurred within the observed area). For a viewing angle of $\sim46^{\circ}$ (the best-fit binary inclination derived from the gravitational wave signal) and assumed electron and magnetic field energy fractions of $ε_e=0.1$ and $ε_B=0.01$, we can rule out a typical short gamma-ray burst-like Gaussian jet with isotropic-equivalent kinetic energy $2\times10^{51}$ erg propagating into a constant density medium $n\gtrsim0.01$ cm$^{-3}$. These are the first limits resulting from a galaxy-targeted search for a radio counterpart to a gravitational wave event, and we discuss the challenges, and possible advantages, of applying similar search strategies to future events using current and upcoming radio facilities.
description: Accepted to ApJ; text and figures updated to match accepted version. 20 pages, 6 figures, 1 table
Neutrinos in flat extra dimension: towards a realistic scenario
Creators: name: Abada, Asmaa
name: Dey, Paramita
name: Moreau, Grégory
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the simple extension of the Standard Model in which an additional right handed neutrino propagates along a flat extra dimension, while the Standard Model fields are confined on a 3-brane. The fifth dimension is $S^1/Z_2$ orbifold compactified. In this scenario, the neutrino mass can be naturally suppressed. By studying systematically the fundamental parameter space, we show that the strong phenomenological constraints on mixing angles between active and sterile neutrinos (especially those derived from the SNO experiment data) do not conflict with the possibility of generating a realistic neutrino mass spectrum. As a second step, we explore the possibility of a successful leptogenesis through the decays of the Kaluza-Klein excitations of the right handed neutrino.
description: 16 pages, 2 ps figures
A study into the regulation of ovarian follicular dynamics by progestins in the bovine
Creators: name: Taylor, Christopher C.
Publisher: name: University of British Columbia
Year: 2009

description: Ovarian follicles grow and regress in a wave-like pattern during the luteal phase of the estrous cycle in the bovine. Each wave of follicular growth gives rise to a dominant follicle. What causes non ovulatory dominant follicles to stop growing, become atretic, and regress is not understood. The synthetic progestin, norgestomet, has been shown to induce the maintenance of dominant follicles in the absence of a corpus luteum in the bovine. This provides an excellent model for studying the regulation of dominant follicle growth, maintenance and regression. A series of in vivo experiments using norgestomet and progesterone (P₄) were undertaken to determine how progestins modulate dominant follicle growth, maintenance, and regression. In addition, in vitro experiments were conducted to determine the effects of P₄ on steroidogenesis at the granulosa cell level. The results indicate that in the absence of a corpus luteum norgestomet induces the maintenance of dominant follicles and new follicular growth is arrested. This is the result of persistent high-frequency luteinizing hormone (LH) pulses from the pituitary gland. When the circulating concentration of progestin is increased, either with norgestomet or P₄, circulating LH decreases, the maintained dominant follicle regresses and new follicular growth is restored. Administration of exogenous P₄ early in the estrous cycle, a period normally characterized by low plasma P₄ concentrations and high-frequency LH pulses, induces premature regression of the first wave dominant follicle. Thus, high circulating P₄ and low circulating LII is permissive to normal follicle turnover. The in vitro results suggest that P₄ may enhance bovine granulosa cell estradiol-17ß and P₄ production. Progesterone had no suppressive effects on granulose cell steroidogenesis, even at very high concentrations (10.6 M). Taken as a whole, the results suggest that progestins modulate dominant follicle growth, maintenance and regression by regulating pituitary LH release. High-frequency LH pulses induce the maintenance of dominant follicles. A normal pattern of follicular growth and regression is restored with a decrease in LH pulse frequency and decreased circulating LH. These results may have important implications for improving estrus synchronization and superovulatory protocols and lead to a better understanding of some reproductive disorders in cattle such as cystic ovary condition. The norgestomet induced maintained dominant follicle model may also provide a valuable tool for conducting research into the establishment, maintenance and loss of follicular dominance.
Απόψεις των νηπιαγωγών για την εφαρμογή ενός ερευνητικού εργαλείου αξιολόγησης των νηπίων σε δεξιότητες Πληροφορικής
Creators: name: Παπαδημητρίου, Σταματία Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: Νηπιαγωγοί
Εκπαιδευτικό λογισμικό
Αξιολόγηση
Kindergarten teachers
Educational software
Assessment

description: Σκοπός της παρούσας έρευνας είναι η διερεύνηση και καταγραφή των απόψεων των νηπιαγωγών μετά από την εφαρμογή στην τάξη ενός συγκεκριμένου εργαλείου αξιολόγησης δεξιοτήτων Πληροφορικής των νηπίων (10 εκπαιδευτικά παιχνίδια). Συμμετείχαν 20 νηπιαγωγεία στους Νομούς Θεσπρωτίας και Ιωαννίνων. Τα δεδομένα συλλέχτηκαν με ημιδομημένες συνεντεύξεις νηπιαγωγών και το περιεχόμενο τους μελετήθηκε με την τεχνική της ανάλυσης περιεχομένου. Τα αποτελέσματα ανέδειξαν ότι το συγκεκριμένο λογισμικό κρίθηκε κατάλληλο για να εφαρμοστεί στο νηπιαγωγείο και επισημάνθηκαν τα σημεία που χρειάζονταν βελτίωση. Το λογισμικό κινείται στα πλαίσια του ΔΕΠΠΣ, ανταποκρίνεται στο αναπτυξιακό επίπεδο των νηπίων και αναδεικνύει διαφορές στα επιτεύγματά τους, οι οποίες σχετίζονται κυρίως με τη χρήση υπολογιστή στο σπίτι. Συμβάλλει στην συνεργατική και εξατομικευμένη μάθηση και ενσωματώνει την αξιολόγηση στο καθημερινό πρόγραμμα. Ο ρόλος των νηπιαγωγών ήταν καθοριστικός στην εφαρμογή και αξιοποίηση του λογισμικού στην διδακτική πράξη.
description: The aim of the present research is to investigate and record the attitudes of kindergarten teachers on a particular computer skills assessment tool for toddlers (10 educational games) after its implementation in the classroom. Twenty kindergartens of Thesprotia and Ioannina Prefectures participated in this study. Semi-structured interviews of kindergarten teachers and the technique of content analysis were used for data collection and content study respectively. Research findings revealed that this software was considered appropriate to apply to kindergarten and pointed out a few of its areas that need further improvement. The software is in line with the National Curriculum, meets young children’s developmental levels and highlights achievement differences, mainly related to computer use at home. It also provides a contribution to collaborative and individualized learning and incorporates assessment into the daily curriculum. Kindergarten teachers were instrumental in the implementation and utilization of this software in teaching practice.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Νηπιαγωγών (Πανεπιστήμιο Δυτικής Μακεδονίας)
Non-adiabatic single-electron pump in a dopant-free GaAs/AlGaAs 2DEG
Creators: name: Buonacorsi, B.
name: Sfigakis, F.
name: Shetty, A.
name: Tam, M. C.
name: Kim, H. S.
name: Harrigan, S. R.
name: Hohls, F.
name: Reimer, M. E.
name: Wasilewski, Z. R.
name: Baugh, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have realized quantized charge pumping using non-adiabatic single-electron pumps in dopant-free GaAs two-dimensional electron gases (2DEGs). The dopant-free III-V platform allows for ambipolar devices, such as p-i-n junctions, that could be combined with such pumps to form electrically-driven single photon sources. Our pumps operate at up to 0.95 GHz and achieve remarkable performance considering the relaxed experimental conditions: one-gate pumping in zero magnetic field and temperatures up to 5K, driven by a simple RF sine waveform. Fitting to a universal decay cascade model yields values for the figure of merit $δ$ that compare favorably to reported modulation-doped GaAs pumps operating under similar conditions. The devices reported here are already suitable for optoelectronics applications, and with further improvement could offer a route to a current standard that does not require sub-Kelvin temperatures and high magnetic fields.
description: 4 pages + references, 4 figures. Version 3: Updated Figure 2 with higher resolution data. Minor revisions in main text. Conclusions and arguments unchanged. Added Supplementary Material file. Version 2: Main results and analysis unchanged, minor revisions in presentation. Included new figure about fabrication details and expanded relevance of results to quantum optoelectronic applications
Constraints on a strong X-ray flare in the Seyfert galaxy MCG-6-30-15
Creators: name: Goosmann, R. W.
name: Czerny, B.
name: Karas, V.
name: Dovciak, M.
name: Ponti, G.
name: Mouchet, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss implications of a strong flare event observed in the Seyfert galaxy MCG-6-30-15 assuming that the emission is due to localized magnetic reconnection. We conduct detailed radiative transfer modeling of the reprocessed radiation for a primary source that is elevated above the disk. The model includes relativistic effects and Keplerian motion around the black hole. We show that for such a model setup the observed time-modulation must be intrinsic to the primary source. Using a simple analytical model we then investigate time delays between hard and soft X-rays during the flare. The model considers an intrinsic delay between primary and reprocessed radiation, which measures the geometrical distance of the flare source to the reprocessing sites. The observed time delays are well reproduced if one assumes that the reprocessing happens in magnetically confined, cold clouds.
description: 4 pages, 2 figures, proceedings of a talk given at the symposium 238 at the IAU General Assembly 2006
Non-local reparametrization action in coupled Sachdev-Ye-Kitaev models
Creators: name: Milekhin, Alexey
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We continue the investigation of coupled Sachdev-Ye-Kitaev(SYK) models without Schwarzian action dominance. Like the original SYK, at large N and low energies these models have an approximate reparametrization symmetry. However, the dominant action for reparametrizations is non-local due to the presence of irrelevant local operator with small conformal dimension. We semi-analytically study different thermodynamic properties and the 4-point function and demonstrate that they significantly differ from the Schwarzian prediction. However, the residual entropy and maximal chaos exponent are the same as in Majorana SYK. We also discuss chain models and finite N corrections.
description: v1: 48 pages, 24 figures. v2: typos corrected, references added
Topological types of real regular jacobian elliptic surfaces
Creators: name: Bihan, Frédéric
name: Mangolte, Frédéric
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14P25, 14J27

description: We present the topological classification of real parts of real regular elliptic surfaces with a real section.
description: 17 pages, 7 figures, to appear in Geometriae Dedicata
Statistical mechanics of one-dimensional quantum droplets
Creators: name: Mithun, T.
name: Mistakidis, S. I.
name: Schmelcher, P.
name: Kevrekidis, P. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Other Condensed Matter (cond-mat.other)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the statistical mechanics and the dynamical relaxation process of modulationally unstable one-dimensional quantum droplets described by a modified Gross-Pitaevskii equation. To determine the classical partition function thereof, we leverage the semi-analytical transfer integral operator (TIO) technique. The latter predicts a distribution of the observed wave function amplitudes and yields two-point correlation functions providing insights into the emergent dynamics involving quantum droplets. We compare the ensuing TIO results with the probability distributions obtained at large times of the modulationally unstable dynamics as well as with the equilibrium properties of a suitably constructed Langevin dynamics. We find that the instability leads to the spontaneous formation of quantum droplets featuring multiple collisions and by which are found to coalesce at large evolution times. Our results from the distinct methodologies are in good agreement aside from the case of low temperatures in the special limit where the droplet widens. In this limit, the distribution acquires a pronounced bimodal character, exhibiting a deviation between the TIO solution and the Langevin dynamics.
description: 12 pages, 10 figures