cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
SU(2) gauge theory of the Hubbard model and application to the honeycomb lattice
Creators: name: Hermele, Michael
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Motivated by recent experiments on the triangular lattice Mott-Hubbard system kappa-(BEDT-TTF)2Cu2(CN)3, we develop a general formalism to investigate quantum spin liquid insulators adjacent to the Mott transition in Hubbard models. This formalism, dubbed the SU(2) slave-rotor formulation, is an extension of the SU(2) gauge theory of the Heisenberg model to the case of the Hubbard model. Furthermore, we propose the honeycomb lattice Hubbard model (at half-filling) as a candidate for a spin liquid ground state near the Mott transition; this is an appealing possibility, as this model can be studied via quantum Monte Carlo simulation without a sign problem. The pseudospin symmetry of Hubbard models on bipartite lattices turns out to play a crucial role in our analysis, and we develop our formalism primarily for the case of a bipartite lattice. We also sketch its development for a general Hubbard model. We develop a mean-field theory and apply it to the honeycomb lattice. On the insulating side of the Mott transition, we find an SU(2) algebraic spin liquid (ASL), described by gapless S = 1/2 Dirac fermions (spinons) coupled to a fluctuating SU(2) gauge field. We construct a low-energy effective theory describing the ASL phase, the conducting semimetal phase and the Mott transition between them. This physics can be detected in numerical simulations via the simultaneous presence of substantial antiferromagnetic and valence-bond solid correlations. Our analysis suggests that both a third-neighbor electron hopping, and/or pseudospin-breaking terms such as a nearest-neighbor density interaction, may help to stabilize a spin liquid phase.
description: 30 pages, 5 figures. Final version, to appear in PRB
Ultra-Thin Absorber based on Phase Change Metamaterial Superlattice
Creators: name: Mastro, Michael A.
name: Wheeler, Virginia D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: In this paper, a superlattice VO2/SiO2 metamaterial on a lossy substrate is designed to create a near perfect absorber with tunability across the infrared spectrum. We selected VO2 as it presents a dielectric to metal-like phase change slightly above room temperature. Additionally, the slightly lossy nature of high-temperature VO2 presents comparable and small components (real and imaginary) of the complex refractive index across portions of the visible and infrared. Coupled with a limited conductivity substrate, VO2 has been employed to create highly absorbing/emitting structures where the thickness of the VO2 is ultra-thin (t << lambda/4n). Nevertheless, metal-like VO2 does not possess comparable and small components of the complex refractive index across the entire infrared spectrum, which limits the universality of this ultra-thin VO2 absorber design. Here we employ an ultra-thin superlattice of VO2/SiO2 to create a composite metamaterial that is readily designed for high absorbance across the infrared spectrum.
ALMA Resolves Giant Molecular Clouds in a Tidal Dwarf Galaxy
Creators: name: Querejeta, M.
name: Lelli, F.
name: Schinnerer, E.
name: Colombo, D.
name: Lisenfeld, U.
name: Mundell, C. G.
name: Bigiel, F.
name: García-Burillo, S.
name: Herrera, C. N.
name: Hughes, A.
name: Kruijssen, J. M. D.
name: Meidt, S. E.
name: Moore, T. J. T.
name: Pety, J.
name: Rigby, A. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Tidal dwarf galaxies (TDGs) are gravitationally bound condensations of gas and stars formed during galaxy interactions. Here we present multi-configuration ALMA observations of J1023+1952, a TDG in the interacting system Arp 94, where we resolve CO(2-1) emission down to giant molecular clouds (GMCs) at 0.64" ~ 45pc resolution. We find a remarkably high fraction of extended molecular emission (~80-90%), which is filtered out by the interferometer and likely traces diffuse gas. We detect 111 GMCs that give a similar mass spectrum as those in the Milky Way and other nearby galaxies (a truncated power law with slope of -1.76+/-0.13). We also study Larson's laws over the available dynamic range of GMC properties (~2 dex in mass and ~1 dex in size): GMCs follow the size-mass relation of the Milky Way, but their velocity dispersion is higher such that the size-linewidth and virial relations appear super-linear, deviating from the canonical values. The global molecular-to-atomic gas ratio is very high (~1) while the CO(2-1)/CO(1-0) ratio is quite low (~0.5), and both quantities vary from north to south. Star formation is predominantly taking place in the south of the TDG, where we observe projected offsets between GMCs and young stellar clusters ranging from ~50pc to ~200pc; the largest offsets correspond to the oldest knots, as seen in other galaxies. In the quiescent north, we find more molecular clouds and a higher molecular-to-atomic gas ratio (~1.5); atomic and diffuse molecular gas also have a higher velocity dispersion there. Overall, the organisation of the molecular ISM in this TDG is quite different from other types of galaxies on large scales, but the properties of GMCs seem fairly similar, pointing to near universality of the star-formation process on small scales.
description: 21 pages, 12 figures, accepted for publication in A&A
Low-energy sector of 8-dimensional General Relativity: Electro-Weak model and neutrino mass
Creators: name: Cianfrani, Francesco
name: Montani, Giovanni
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In a Kaluza-Klein space-time $V^{4}\otimes S^{3}$, we demonstrate that the dimensional reduction of spinors provides a 4-field, whose associated SU(2) gauge connections are geometrized. However, additional and gauge-violating terms arise, but they are highly suppressed by a factor $β$, which fixes the amount of the spinor dependence on extra-coordinates. The application of this framework to the Electro-Weak model is performed, thus giving a lower bound for $β$ from the request of the electric charge conservation. Moreover, we emphasize that also the Higgs sector can be reproduced, but neutrino masses are predicted and the fine-tuning on the Higgs parameters can be explained, too.
description: 14 pages, 1 figure, to appear on Int. J. Mod. Phys. D
MPEC 2024-T163 : 2024 TX3
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 TX3

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
CANDELS Meets GSWLC: Evolution of the Relationship Between Morphology and Star Formation Since z = 2
Creators: name: Osborne, Chandler
name: Salim, Samir
name: Damjanov, Ivana
name: Faber, S. M.
name: Huertas-Company, Marc
name: Koo, David C.
name: Mantha, Kameswara Bharadwaj
name: McIntosh, Daniel H.
name: Primack, Joel R.
name: Tacchella, Sandro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Galaxy morphology and its evolution over the cosmic epoch hold important clues for understanding the regulation of star formation (SF). However, studying the relationship between morphology and SF has been hindered by the availability of consistent data at different redshifts. Our sample, combining CANDELS (0.8 < z < 2.5) and the GALEX-SDSS-WISE Legacy Catalog (GSWLC; z ~ 0), has physical parameters derived using consistent SED fitting with flexible dust attenuation laws. We adopt visual classifications from Kartaltepe et al. 2015 and expand them to z ~ 0 using SDSS images matching the physical resolution of CANDELS rest-frame optical images and deep FUV GALEX images matching the physical resolution of the CANDELS rest-frame FUV images. Our main finding is that disks with SF clumps at z ~ 0 make a similar fraction (~15%) of star-forming galaxies as at z ~ 2. The clumpy disk contribution to the SF budget peaks at z ~ 1, rather than z ~ 2, suggesting that the principal epoch of disk assembly continues to lower redshifts. Star-forming spheroids ("blue nuggets"), though less centrally concentrated than quenched spheroids, contribute significantly (~15%) to the SF budget at z ~ 1-2, suggesting that compaction precedes quenching. Among green valley and quiescent galaxies, the pure spheroid fraction drops since z ~ 1, whereas spheroids with disks (S0-like) become dominant. Mergers at or nearing coalescence are enhanced in SFR relative to the main sequence at all redshifts by a factor of ~2, but contribute $\lesssim$5% to the SF budget, with their contribution remaining small above the main sequence.
description: 26 pages, 13 figures, 3 tables, accepted for publication in ApJ
Graphs, free groups and the Hanna Neumann conjecture
Creators: name: Everitt, Brent
Publisher: name: arXiv
Year: 2007
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: A new bound for the rank of the intersection of finitely generated subgroups of a free group is given, formulated in topological terms, and very much in the spirit of Stallings. The bound is a contribution to (although unfortunately not a solution of) the strengthened Hanna Neumann conjecture.
description: J. Group Theory (to appear)
Thermal properties study of silicon nanostructures by photoacoustic techniques
Creators: name: Dubyk, K.
name: Nychyporuk, T.
name: Lysenko, V.
name: Termentzidis, K.
name: Castanet, G.
name: Lemoine, F.
name: Lacroix, D.
name: Isaiev, Mykola
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The photoacoustic method with piezoelectric detection for the simultaneous evaluation of the thermophysical properties is proposed. The approach is based on the settling of an additional heat sink for redistribution of heat fluxes deposited on the sample surface. Firstly, the approach was tested on the porous silicon with well-defined morphology and well-studied properties. Then, heat capacity and thermal conductivity of silicon nanowires arrays have been investigated by recovering the experimental data through numerical simulations. The decrease of heat capacity and effective thermal conductivity of the samples upon increasing thickness and porosity of the sample is observed. Such behavior could be caused by the increase of the structure heterogeneity. In particular, this can be related to larger disorder (increased density of broken nanowires and larger porosity) that appears during the etching process of the thick layers.
Development of a real-time advisory expert system as a training tool for copper flotation operators
Creators: name: Poirier, Philippe
Publisher: name: University of British Columbia
Year: 2009

description: An Expert System has been implemented to assist operators in applying knowledge about froth conditions in the control of the flotation circuit at Fiighland Valley Copper. For some time, the personnel at Fiighland Valley Copper have recognized that froth type is a useful indicator of good operating conditions. However, the operating strategy based on froth type recognition is an ad-hoc skill in which different operators use a variety of terms, features and procedures to identify and solve problems. This knowledge was brought into a real-time environment to advise the operators on the floor in identifying froth types and troubleshooting corrective action. This thesis describes the steps taken to acquire the knowledge, to design the required system, to implement the real-time advisory expert system and the trend analysis module and to evaluate its efficiency as a training tool.
Το ταφικό συγκρότημα του Αλανφούση της Αλεξάνδρειας, αναλυτική μελέτη
Creators: name: Alhossary, Mahmoud Hassan
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Αλεξάνδρεια
Νεκροταφεία
Αλανφούση
Alexandria
Cemeteries
Anfoushy

description: Σκοπός της διατριβής ήταν η αναλυτική μελέτη του ταφικού συγκροτήματος του Αλανφούση της Αλεξάνδρειας, στο πλαίσιο των νεκροταφείων της Αλεξάνδρειας, καθώς και της σχέσης μεταξύ των δύο πολιτισμών, του πολιτισμού των αρχαίων Ελλήνων και των αρχαίων Αιγυπτίων. Αυτής της σχέσης, η οποία είχε δημιουργήσει ένα μοναδικό και κρίσιμο μείγμα στην μαγευτική πόλη της Αλεξάνδρειας πριν χιλιάδες χρόνια. Ως αποτέλεσμα αυτής της μακράς συνύπαρξης στην ίδια πόλη, Αιγύπτιοι και Έλληνες υπάγονταν στο ίδιο νομοθετικό σύστημα, το ίδιο κράτος και στην ίδια εξουσία των Πτολεμαίων. Επομένως, αυτό το μείγμα των δύο πολιτισμών είχε φτάσει στην κορυφή του, αρχίζοντας με την ζωή στην ίδια πόλη και φτάνοντας μέχρι τη λατρεία του ίδιου Θεού, του Σέραπη. Σαφώς όμως, ο αιγυπτιακός χαρακτήρας ήταν πιο κυρίαρχος. Έτσι, ήταν λογικό εκείνη την εποχή, το μείγμα που είχε δημιουργηθεί στην επίγεια ζωή, να δείξει τα ίχνη του και στην μετά θάνατον ζωή, μέσω των νεκροταφείων της Αλεξάνδρειας.
description: The aim of the present thesis was the analytical study of the Anfoushy tombs of Alexandria, in the framework of the cemeteries of Alexandria, as well as the relation between the two civilizations, the civilization of ancient Greeks and of ancient Egyptians. This relation had created a unique and crucial mixture at the magnificent city of Alexandria thousands of years ago. As a result of their long co-existence in the very same city, Egyptians and Greeks were subject to the same law system, the same government and the same authority of Ptolemies. Therefore, this unique mixture of civilizations had reached its peak, beginning with living in the same city and reaching the worship of the same God, Serapis. But clearly, the Egyptian character was more dominating. So, logically at that period, the mixture which was created in the earthly life, showed its traces in life after death, through the cemeteries of Alexandria.
ประสิทธิภาพป่าพรุพื้นที่ชุ่มน้ำตามธรรมชาติในการบำบัดน้ำเสียชุมชนบ้านไม้ขาว อำเภอถลาง จังหวัดภูเก็ต
Creators: name: สายธาร ทองพร้อม
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: ประสิทธิภาพ,พื้นที่ชุ่มน้ำ,ป่าพรุ,การบำบัดน้ำเสีย

description: 3, 7, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Simulating Spin Waves in Entropy Stabilized Oxides
Creators: name: Berlijn, Tom
name: Alvarez, Gonzalo
name: Parker, David S.
name: Hermann, Raphaël P.
name: Fishman, Randy S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The entropy stabilized oxide Mg$_{0.2}$Co$_{0.2}$Ni$_{0.2}$Cu$_{0.2}$Zn$_{0.2}$O exhibits antiferromagnetic order and magnetic excitations, as revealed by recent neutron scattering experiments. This observation raises the question of the nature of spin wave excitations in such disordered systems. Here, we investigate theoretically the magnetic ground state and the spin-wave excitations using linear spin-wave theory in combination with the supercell approximation to take into account the extreme disorder in this magnetic system. We find that the experimentally observed antiferromagnetic structure can be stabilized by a rhombohedral distortion together with large second nearest neighbor interactions. Our calculations show that the spin-wave spectrum consists of a well-defined low-energy coherent spectrum in the background of an incoherent continuum that extends to higher energies.
An ensemble learning approach for modeling the systems biology of drug-induced injury in human liver
Creators: name: Aguirre-Plans, Joaquim
name: Terezinha Souza
name: Piñero, Janet
name: Callegaro, Giulia
name: Kunnen, Steven J.
name: Furlong, Laura I.
name: Oliva, Baldo
name: Guney, Emre
Publisher: name: F1000 Research Limited
Year: 2019

description: Drug-induced liver injury (DILI) has a relatively high incidence rate, estimated to affect around 20 in 100,000 inhabitants worldwide each year. Many drugs ranging from pain killers to anti-tuberculous treatments can cause DILI. Despite DILI being one of the leading causes of acute liver failure, the pathophysiology of DILI is poorly understood and pinpointing the toxicity of compounds in human liver remains non-trivial. Accordingly, several methods have been proposed to predict the hepatotoxicity of compounds. Among these, machine learning models trained using drug estructural features have shown a good performance. Furthermore, the incorporation of gene- and pathway-level signatures from transcriptomics data has shown a high predictive accuracy using Deep Neural Networks. In this work, to predict DILI, we investigated combining gene expression data from the Connectivity Map (CMap), target binding information and chemical similarity of drugs upon drug treatment into ensemble learning methods using random forest classifiers and gradient boosting machines.
Hamiltonian Memory: An Erasable Classical Bit
Creators: name: Holtzman, Roi
name: Arwas, Geva
name: Raz, Oren
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Computations implemented on a physical system are fundamentally limited by the laws of physics. A prominent example for a physical law that bounds computations is the Landauer principle. According to this principle, erasing a bit of information requires a concentration of probability in phase space, which by Liouville's theorem is impossible in pure Hamiltonian dynamics. It therefore requires dissipative dynamics with heat dissipation of at least $k_BT\log 2$ per erasure of one bit. Using a concrete example, we show that when the dynamic is confined to a single energy shell it is possible to concentrate the probability on this shell using Hamiltonian dynamic, and therefore to implement an erasable bit with no thermodynamic cost.
description: 3 Figures, 14 pages
Αναδρομική μελέτη της χειρουργικής θεραπείας του καρκινώματος του πλακώδου επιθηλίου στα εξωτερικά γεννητικά όργανα στον σκύλο
Creators: name: Νάτσιος, Παύλος Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Aκανθοκυτταρικο καρκίνωμα
Εξωτερικά γεννητικά όργανα
Σκύλος
Squamous cell carcinoma
External genitalia
Dog

description: Στην παρούσα εργασία μελετήθηκαν 6 σκύλοι με καρκίνωμα του πλακώδους επιθηλίουν των εξωτερικών γεννητικών οργάνων (ακροποσθία, όσχεο), που προσκομίστηκαν στο Τμήμα Κτηνιατρικής της Σχολής Επιστημών Υγείας του Αριστοτέλειου Πανεπιστημίου Θεσσαλονίκης την περίοδο Ιανουάριος 2000- Δεκέμβριος 2014. Όλα τα ζώα της μελέτης άνηκαν σε μεγαλόσωμες φυλές. Από τα 6 αυτά ζώα τα 2 εμφάνισαν αλλοιώσεις μόνο στην ακροποσθία, 2 στο όσχεο και 1 στην ακροποσθία και το όσχεο και 1 ζώο στην πόσθη και το όσχεο. Σε 3/6 ζώα η χειρουργική αντιμετώπιση έγινε με ακρωτηριασμό του πέους και του οσχέου με διενέργεια οσχεϊκής ουρηθροστομίας, σε 2/6 ζώα έγινε ορχεκτομή και οσχεκτομή, ενώ σε 1 περιστατικό πραματοποιήθηκε μερική εκτομή του πέους. Συχνότερη μετεγχειρητική επιπλοκή ήταν η αιμορραγία από την ουρηθροστομία ενώ σε 1 περιστατικό οπoυ έγινε ακρωτηριασμός του πέους παρατηρήθηκε διάσπαση και διαπύηση του τραύματος στο πρόσθιο άκρο της που αντιμετωπίστηκε συντηρητικά. Ο διάμεσος χρόνος επιβίωσης μετά την επέμβαση ήταν 13 μήνες. Σε 5/6 ζώα έγινε ευθανασία με απόφαση του ιδιοκτήτη ύστερα από υποτροπή του νεοπλάσματος, ενώ 1/6 ζώα κατέληξε σε προχωρημένη ηλικία χωρίς να παρουσιάσει υποτροπή.
description: In the present study 6 dogs with Squamous Cell Carcinoma (SCC) of the external genitalia were examined. All dogs were presented at the Small Animal Clinic of the Faculty of Veterinary Medicine of the Aristotle University of Thessaloniki during the period January 2000-December 2014. All patients were large-breed dogs. 2/6 dogs were diagnosed with SCC in the foreskin, 2/6 in the scrotum, 1/6 in the foreskin and scrotum and 1/6 in the foreskin and prepuce. 3/6 patients were treated with penis amputation and scrotum resection combined with scrotal urethrostomy, 2/6 dogs were treated with orchiectomy and scrotum resection and in one case partial penis amputation was performed. The complication most often occured was haemorrhage from the urethrostomy, while in one case with partial penis amputation suppuration was observed which was conservatively treated. The median survival time after surgery was 13 months. 5/6 animals were euthanized by decision of the owner after recurrence of the tumor, while 1/6 animals reached an advanced age without experiencing relapse.
ปัจจัยที่สัมพันธ์กับพฤติกรรมด้านทันตสุขภาพของผู้ใช้บริการทันตกรรม : กรณีศึกษาโรงพยาบาลสมเด็จพระยุพราชเวียงสระ
Creators: name: นิตยา เจริญกุล
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: พฤติกรรมด้านทันตสุขภาพผู้ใช้บริการทันตกรรม,ปัจจัยที่มีผลต่อพฤติกรรมด้านทันตสุขภาพ

description: 3, 7, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Lp-distributions on symmetric spaces
Creators: name: Ruzhansky, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Functional Analysis (math.FA)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 46F05; 46F10; 53C21; 53C35

description: The notion of $L^p$-distributions is introduced on Riemannian symmetric spaces of noncompact type and their main properties are established. We use a geometric description for the topology of the space of test functions in terms of the Laplace-Beltrami operator. The techniques are based on a-priori estimates for elliptic operators. We show that structure theorems, similar to $\Rn$, hold on symmetric spaces. We give estimates for the convolutions.
การสร้างเสริมสุขภาพนักศึกษาด้วยการออกกำลังกาย : การเต้นแอโรบิก
Creators: name: พวงน้อย แสงแก้ว
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: การสร้างเสริมสุขภาพ,การออกกำลังกาย,การเต้นแอโรบิก,สมรรถภาพทางกาย

description: 3, 7, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
China and the BRI Ten Years on:China and the BRI Ten Years on: Geopolitics and Development
Creators: name: Ganchev, Ivo
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 440808
subject: International relations
classificationCode: 440899
subject: Political science not elsewhere classified
classificationCode: 440803
subject: Comparative government and politics
classificationCode: 440807
subject: Government and politics of Asia and the Pacific

description: In this article, Dr. Ivo Ganchev builds on his interview with Martin Zubko on the IR thinker podcast, exploring the Belt and Road Initiative (BRI) a decade after its launch within the wider context of China’s growing global ambitions. Initially launched as China’s flagship infrastructure project, the BRI has become part of a larger strategic framework alongside the Global Development Initiative (GDI), Global Security Initiative (GSI), and Global Civilization Initiative (GCI). These initiatives signal China’s shift toward a more comprehensive global leadership role, encompassing economic development, security, and cultural diplomacy. Drawing on Dr. Ganchev’s research expertise and practical experience, this article examines the BRI’s geopolitical significance, its economic impact, and challenges such as debt sustainability and transparency. It also investigates how the BRI intersects with other global initiatives like the EU’s Global Gateway and multilateral platforms such as BRICS and the Shanghai Cooperation Organization (SCO). This article argues that despite financial challenges, the BRI remains a foundational element of China’s evolving global strategy, shedding light on China’s role in shaping global governance.
Εκτίμηση μέτρησης μήκους: Επιδόσεις και στρατηγικές των παιδιών
Creators: name: Γιακουμή, Μαρία Αντωνίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: εκτίμηση μέτρησης μήκους
τυπικές και άτυπες μονάδες μέτρησης
μαθητές/μαθήτριες δημοτικού
length measurement estimation
standard and nonstandard units of measurement
primary school students

description: Σκοπός της παρούσας εργασίας είναι η εξέταση της επίδοσης και των στρατηγικών που χρησιμοποιούν μαθητές/τριες δημοτικού κατά την εκτίμηση μέτρησης μήκους. Σε έρευνα που διεξήχθη, ζητήθηκε από 46 παιδιά Γ’ τάξης και 41 παιδιά Ε’ τάξης να εκτιμήσουν το μήκος αντικειμένων μέσα από έργα που αφορούσαν τέσσερις κατηγορίες ερωτήσεων: προσανατολισμού, οπτικής παρεμβολής, χωρικής διάστασης και αναπαραστάσεων. Η επίδοσή τους ήταν σε γενικές γραμμές φτωχή και επηρεάστηκε από την ηλικία, το είδος των μονάδων μέτρησης (τυπικές και άτυπες) και την κατηγορία ερωτήσεων. Επίσης, παρουσιάστηκε ένα μεγάλο εύρος στρατηγικών, η συχνότητα χρήσης των οποίων βρέθηκε να συσχετίζεται τόσο με το είδος των μονάδων μέτρησης όσο και με την ηλικία των παιδιών.
description: This thesis aims to examine the estimation performance and strategies used by primary school students when estimating linear measurements. In the empirical research that has been conducted, 46 third grade and 41 fifth grade students were asked to estimate the length of objects given in four different task contexts; object orientation, visual interference, spatial dimensionality and representations of standard units of measurement. Their performance was generally poor and dependent on their age, the type of measurement units (standard and nonstandard) and the task context. Moreover, the students used a wide range of strategies whose frequency of use was correlated with the type of measurement units as well as with the children’s age.
ผลของอุลตร้าโซนิคต่อการสกัดแอนโทไซยานินจากกระเจี๊ยบแดงด้วยวิธีพื้นผิวตอบสนอง
Creators: name: ณรงค์พันธุ์ รัตนปนัดดา
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: อุลตร้าโซนิค,กระเจี๊ยบแดง,แอนโทไซยานิน,การสกัด

description: 3, 7, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
ฤทธิ์คล้ายเอสโตรเจนและฤทธิ์คุมกำเนิดของกวาวเครือขาวที่เก็บไว้เป็นเวลา 25 ปีในหนูขาว
Creators: name: วสันต์ มะโนเรือง
Publisher: name: วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Year: 2557
Subjects: กวาวเครือขาว,ฤทธิ์คล้ายเอสโตรเจนและฤทธิ์คุมกำเนิด,หนูขาว

description: 3, 7, วารสารวิจัย มสด สาขาวิทยาศาสตร์และเทคโนโลยี
Το Ζήτημα της Γνώσης στη Μεταμοντέρνα Αναπαράσταση της Πραγματικότητας
Creators: name: Αντωνάκη, Ελένη Λεωνίδα
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Μεταμοντερνισμός
Μετανεωτερικότητα
Κοινωνία της Γνώσης
Postmodernism
Postmodernity
Knowledge Society

description: Σκοπός αυτής της εργασίας ήταν η εξέταση και ερμηνεία της επίδρασης της μεταμοντέρνας οπτικής αναφορικά προς τη γνώση, την επιστήμη, την υποκειμενικότητα, την ιστορία, εν τέλει την ίδια την κοινωνία. Εξετάστηκαν συνθήκες ανάδυσης του μεταμοντέρνου παραδείγματος, διερευνήθηκαν οι κεντρικές θεματικές της μεταμοντέρνας ιδεολογίας και η σχέση της με τη λεγόμενη κοινωνία της γνώσης. Με τη χρήση του εργαλείου της περιοδολόγησης ορίστηκαν οι φάσεις ανάπτυξης και διάχυσης των μεταμοντέρνων ιδεών, όπως και η επίδρασή τους στο κοινωνικό συγκείμενο. Αναφέρθηκαν οι βασικές αρχές και οι κύριοι εκφραστές του μεταμοντέρνου στοχασμού, όπως και οι συνέπειες του μεταμοντέρνου προτάγματος αναφορικά προς την εκπαίδευση, την επιστήμη και τη γνώση.
description: The aim of the present project was the study and examination of the impact that the postmodern perspective has had in reference to knowledge, science, subjectivity, history and to society as a whole. We examined the context of emergence of the postmodern ideology and the central themes of postmodernism in relation to the so-called knowledge society. Using the periodisation tool we defined the stages of development and diffusion of the postmodern ideas, as well as their impact upon the social context. We referred to the basic principles, the main axes and the central figures of the postmodern thought and its consequences in reference to education, science and knowledge.
A fully basis invariant Symmetry Map of the 2HDM
Creators: name: Bento, Miguel P.
name: Boto, Rafael
name: Silva, João P.
name: Trautner, Andreas
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive necessary and sufficient conditions for all global symmetries of the most general two Higgs doublet model (2HDM) scalar potential entirely in terms of reparametrization independent, i.e. basis invariant, objects. This culminates in what we call a "Symmetry Map" of the parameter space of the model and the fundamental insight that there are, in general, two algebraically distinct ways of how symmetries manifest themselves on basis invariant objects: either, basis invariant objects can be non-trivially related, or, basis covariant objects can vanish. These two options have different consequences on the resulting structure of the ring of basis invariants and on the number of remaining physical parameters. Alongside, we derive for the first time necessary and sufficient conditions for CP conservation in the 2HDM entirely in terms of CP-even quantities. This study lays the methodological foundation for analogous investigations of global symmetries in all other models that have unphysical freedom of reparametrization, most notably the Standard Model flavor sector.
description: 27 pages, 2 tables, 1 figure
Σεξουαλικότητα και νοητική αναπηρία: ο λόγος των εργαζομένων της πρωτοβάθμιας ειδικής εκπαίδευσης
Creators: name: Αρμένης, Νικόλαος Γεράσιμου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Σεξουαλικότητα
Νοητική αναπηρία
Πρωτοβάθμια Ειδική Εκπαίδευση
Sexuality
Mental disability
Primary special education

description: Η σεξουαλικότητα των μαθητών με νοητική αναπηρία είναι ένα θέμα που απασχολεί ιδιαίτερα το προσωπικό της πρωτοβάθμιας ειδικής εκπαίδευσης. Στην παρούσα έρευνα, μέσα από μια σειρά ποιοτικών συνεντεύξεων, επιχειρήσαμε να αναδείξουμε τον λόγο των εργαζομένων σε σχέση με τη σεξουαλικότητα και τη νοητική αναπηρία.για την ανάλυση των δεδομένων χρησιμοποιήσαμε την θεματική ανάλυση περιεχομένου και τα θεματικά δίκτυα της Attride-Stirling. Στα αποτελέσματα της έρευνας διαφάνηκαν οι δυσκολίες που αντιμετωπίζει το προσωπικό στη διαχείριση της σεξουαλικής έκφρασης των μαθητών με νοητική αναπηρία. Το σχολείο θεωρείται κατάλληλο πλαίσιο για την εφαρμογή σεξουαλικής εκπαίδευσης, ωστόσο το προσωπικό αισθάνεται ανεπαρκές για να εφαρμόσει αντίστοιχα προγράμματα. Η σεξουαλικότητα περιγράφεται ως δικαίωμα κι ως κάτι θετικό για τα άτομα με νοητική αναπηρία .Ταυτόχρονα περιγράφεται κι ως απειλή για το άτομο και την οικογένεια ειδικά όταν συνδέεται με την αναπαραγωγή και την γονεϊκότητα. Αυτή η έρευνα υποστηρίζει ότι η εφαρμογή επίσημων προγραμμάτων σεξουαλικής εκπαίδευσης θα διευκόλυνε τις ανάγκες τόσο του προσωπικού όσο και των μαθητών.
description: Sexuality of students with intellectual disabilities is a matter of particular concern to the staff of primary special education. In this research , through a series of qualitative interviews, we tried to highlight the discourse of employees in relation to sexuality and mental disability. For data analysis we used the thematic content analysis and thematic networks of Attride-Stirling. The results of the survey emerged the difficulties faced by staff in the management of sexual expression of students with intellectual disabilities. The school is considered appropriate framework for the implementation of sex education, but the staff feels inadequate to support similar programs. Sexuality is described as a right and as something positive for people with intellectual disabilities. Simultaneously sexuality isdescribed as a threat to the individual and the family, especially when associated with reproduction and parenthood. This research argues that the application of formal sex education programs would facilitate the needs of both staff and students.
Computationally-efficient Expressions for the Collision Efficiency Between Electrically Charged Aerosol Particles and Cloud Droplets
Creators: name: Tripathi, S. N.
name: Vishnoi, S.
name: Kumar, S.
name: Harrison, R. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: A multifactor parameterization is described to permit the efficient calculation of collision efficiency (E) between electrically charged aerosol particles and neutral cloud droplets in numerical cloud and climate models. The four parameter representation summarizes the results obtained from a detailed microphysical model of collision efficiency, which accounts for the different forces acting on the aerosol in the path of falling cloud droplets. The parameterizations range of validity is for aerosol particle radius 0.4 to 10 micron, aerosol particle density 1 to 2.0 g.cm-3, aerosol particle charge from neutral to 100 elementary charges and drop radii 18.55-142 micron. It yields collision efficiencies well within an order of magnitude of the detailed models values, from a data set of of 3978 E values. 95 percent of these values have modeled to parameterized ratios between 0.5 and 1.5 for aerosol particle size range 0.4 to 2 micron and about 96 percent in the second size range. This parameterization speeds up the collision efficiency calculation by a factor of about 103, as compared with the original microphysical model, permitting the inclusion of electric charge effects in numerical cloud and climate models. In the following pages parameterization code in C language is provided for readymade use.
Well-posedness of a highly nonlinear shallow water equation on the circle
Creators: name: Mutlubas, Nilay Duruk
name: Geyer, Anna
name: Quirchmayr, Ronald
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q35 (Primary), 35L30 (Secondary)

description: We present a comprehensive introduction and overview of a recently derived model equation for waves of large amplitude in the context of shallow water waves and provide a literature review of all the available studies on this equation. Furthermore, we establish a novel result concerning the local well-posedness of the corresponding Cauchy problem for space-periodic solutions with initial data from the Sobolev space $H^s$ on the circle for $s>3/2$.
Precision measurement of pion-proton absolute differential cross sections at energies spanning the delta resonance
Creators: name: Pavan, Marcello Maurizio
Publisher: name: University of British Columbia
Year: 2009

description: A measurement of the absolute differential cross section in the π±p elastic reaction for incident pion laboratory kinetic energies of Tx = 141.2, 168.8, 193.2, 218.1, 240.9, and 267.3 MeV is described. Measurements where the scattered pion and recoil proton were detected in coincidence with the incident pion beam were taken at all energies. These measurements obtained data at six laboratory pion angles from 600 to 1550. Single arm measurements, where only the scattered pions were detected at six near— forward angles from 200 to 700, were performed at the lowest four energies. Both the single arm and coincidence measurements employed a flat—walled supercooled liquid hydrogen target. The uncertainty in the proton density of this target was 0.5%. Solid CH₂ targets were also employed for coincidence measurements at the lowest four en ergies. The proton density uncertainties of these targets was 1%. Numerous mea surements were performed to test the reproducibility of the cross sections under a variety of experimental conditions, and to elucidate potential sources of systematic uncertainty. Excellent consistency was found amongst all these data sets. In partic ular, the results obtained with the LH₂ and CH₂ targets were consistent at all energies. The final π⁺p data have typically 1-1.5% statistical and 1% normalization uncertain ties, whereas these uncertainties are typically 1.5-2% and 1.5%, respectively, for the π⁻p data. At incident pion energies above 190 MeV, there is reasonable agreement between the results from these measurements and those of Bussey et aL. The agreement with the data of Sadler et al. at 263 MeV is excellent. Below 190 MeV, the data presented here are systematically below the data of Bussey et al. , well outside the stated nor malization uncertainties. The data are consistent within the stated uncertainties with the Brack et a). results near 140 MeV, although the latter results are systematically a few percent lower. At all energies and angles, the results from this work are in agreement within one standard deviation with the predictions of the Virginia Polytechnic Institute SP95 par tial wave analysis (PWA) solution, although the data were not included in the analysis. Consequently, the work presented here adds support to this PWA which concludes that the pion nucleon coupling constant g²/4π = 13.7, and that the mass of the A res onance is 1233.7 MeV, in disagreement with earlier results of partial wave analyses from other groups.
ULAS J234311.93-005034.0: A gravitational lens system selected from UKIDSS and SDSS
Creators: name: Jackson, Neal
name: Ofek, Eran O.
name: Oguri, Masamune
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of a new gravitational lens system. This object, ULAS J234311.93-005034.0, is the first to be selected by using the new UKIRT Infrared Deep Sky Survey (UKIDSS), together with the Sloan Digital Sky Survey (SDSS). The ULAS J234311.93-005034.0 system contains a quasar at redshift 0.788 which is doubly imaged, with separation 1.4". The two quasar images have the same redshift and similar, though not identical, spectra. The lensing galaxy is detected by subtracting point-spread functions from R-band images taken with the Keck telescope. The lensing galaxy can also be detected by subtracting the spectra of the A and B images, since more of the galaxy light is likely to be present in the latter. No redshift is determined from the galaxy, although the shape of its spectrum suggests a redshift of about 0.3. The object's lens status is secure, due to the identification of two objects with the same redshift together with a lensing galaxy. Our imaging suggests that the lens is found in a cluster environment, in which candidate arc-like structures, that require confirmation, are visible in the vicinity. Further discoveries of lenses from the UKIDSS survey are likely as part of this programme, due to the depth of UKIDSS and its generally good seeing conditions.
description: Accepted by MNRAS
Imaging algorithms in radio interferometry
Creators: name: Sault, R. J.
name: Oosterloo, T. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The paper reviews progress in imaging in radio interferometry for the period 1993-1996. Unlike an optical telescope, the basic measurements of a radio interferometer (correlations between antennas) are indirectly related to a sky brightness image. In a real sense, algorithms and computers are the lenses of a radio interferometer. In the last 20 years, whereas interferometer hardware advances have resulted in improvements of a factor of a few, algorithm and computer advances have resulted in orders of magnitude improvement in image quality. Developing these algorithms has been a fruitful and comparatively inexpensive method of improving the performance of existing telescopes, and has made some newer telescopes possible. In this paper, we review recent developments in the algorithms used in the imaging part of the reduction process. What constitutes an `imaging algorithm'? Whereas once there was a steady `forward' progression in the reduction process of editing, calibrating, transforming and, finally, deconvolving, this is no longer true. The introduction of techniques such as self-calibration, and algorithms that go directly from visibilities to final images, have made the dividing lines less clear. Although we briefly consider self-calibration, for the purposes of this paper calibration issues are generally excluded. Most attention will be directed to the steps which form final images from the calibrated visibilities.
description: 30 pages, 4 figures; ISBN 0198565321
Οθωμανικοί Στάβλοι ιππικού στο στρατόπεδο Παύλου Μελά
Creators: name: Ψυλλάκη, Στυλιανή Αντωνίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: οθωμανικοί
στρατώνες
σταβλοι
ottoman
barracks
stables

description: Στα τέλη του 19ου αιώνα και ενώ ακόμα η Θεσσαλονίκη τελεί υπό οθωμανική κυριαρχία, κατασκευάζονται στην πόλη μεγάλοι στρατώνες. Ένας από αυτούς είναι και ο στρατώνας πυροβολικού στην περιοχή του Στρατοπέδου Παύλου Μελά, κατασκευασμένος μεταξύ των ετών 1890 και 1905. Το συγκρότημα των στάβλων του στρατώνα αποτελείται από τρία επιμήκη παράλληλα μεταξύ τους κτίρια τα οποία είναι κατασκευασμένα με φέρουσα λιθοδομή ενώ ήταν στεγασμένα με ξύλινη κεραμοσκεπή στέγη που στηριζόταν σε διπλή σειρά ξύλινων υποστυλωμάτων. Μέχρι πριν λίγα χρόνια τα κτίρια σώζονταν με μικρές αλλοιώσεις. Όμως σήμερα, δύο από αυτά έχουν αλλοιωθεί ανεπανόρθωτα μετά από φωτιά. Η διπλωματική εργασία περιλαμβάνει την αποτύπωση (τοπογραφική - γεωμετρική) των στάβλων, την ανάλυση και τεκμηρίωση των ιστορικών αυτών κτιρίων καθώς και την πρόταση αποκατάστασης και επανάχρησης τους - ένταξης νέας χρήσης. Από το δήμο Παύλου Μελά προτείνεται η χρήση των κτιρίων των στάβλων ως ενότητα χώρων γραφειακών – εμπορικών για την προώθηση της νεανικής επιχειρηματικότητας στον τομέα των τεχνών, του πολιτισμού και των υπηρεσιών. Κύριος στόχος της νέας αρχιτεκτονικής πρότασης είναι να βρεθεί εκείνος ο συνδετικός παράγοντας που θα διατηρήσει τη σημαντική ιστορική μνήμη που φέρει ο χώρος, προσδίδοντας ταυτόχρονα την απαιτούμενη ζωντάνια που θα αντικατοπτρίζει τη νέα χρήση του συγκροτήματος. Ο αρχιτεκτονικός σχεδιασμός του συγκροτήματος των στάβλων έχει ως αφετηρία τον σεβασμό της επίδρασης του χρόνου στα κτίρια. Οι νέες επεμβάσεις θεωρούνται ένα επιπλέον στρώμα στην μακρόχρονη ζωή του κτιρίου.
description: In the late 19th century, while Thessaloniki is still under Ottoman occupation, large army camps are constructed. One of them is the artillery army camp of Pavlou Mela, constructed between 1890 and 1905. The stable complex consists of three mutually parallel similar buildings that are constructed with load-bearing masonry and had tiled roof made by wood supported on a double row of wooden columns. Until a few years ago the buildings survived with minor alterations. But today, two of them have been irretrievably altered after fire. The thesis includes the survey, the analysis and documentation and the proposed restoration and reuse of these historic buildings. The municipality of Pavlos Melas proposed to reuse the buildings as a unity of office and commercial spaces for the promotion of youth entrepreneurship in the arts, culture and services. The main goal of this new architectural proposal is to find the connecting link between preserving the important historical value of the place and giving the complex the necessary vitality that its new use reflects.
Η ελευθερία της λατρείας με αφορμή τους μάρτυρες του Ιεχωβά.
Creators: name: Μήτρα, Αικατερίνη Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2013
Subjects: ελευθερία της λατρείας
ίδρυση ναού
Μανουσάκης
freedom of worship
church founding
Manousakis

description: Η παρούσα εργασία πραγματεύεται το ζήτημα της θρησκευτικής ελευθερίας και συγκεκριμένα την ελευθερία της λατρείας. Στο πρώτο μέρος αναπτύσσεται το ζήτημα της ίδρυσης ναού και ευκτήριου οίκου σύμφωνα με τις διατάξεις του ελληνικού Συντάγματος και τις διατάξεις της Ευρωπαϊκής Σύμβασης των Δικαιωμάτων του Ανθρώπου. Στη συνέχεια αναφέρονται οι περιορισμοί του εν λόγω δικαιώματος στην ελληνική και ευρωπαϊκή έννομη τάξη. Τέλος, αναλύεται η απόφαση του Ευρωπαϊκού Δικαστηρίου Ανθρωπίνων Δικαιωμάτων Μανουσάκης κατά Ελλάδος, καθώς και άλλες παρόμοιες.
description: This paper is dealing with the issue of religious freedom and in particular the freedom of worship. In the first part is developed the issue of founding a church and house of worship in accordance with the provisions of the Greek Constitution and the provisions of the European Convention on Human Rights. Then, it follows an essential reference to limitations placed on this right in Greek and European law. Finally, is analyzed the decision of the European Court of Human Rights Manousakis v. Greece and other similar.
Identifying the 3FHL Catalog. IV. Swift Observations of Unassociated Fermi-LAT 3FHL Sources
Creators: name: Silver, Ross
name: Marchesi, Stefano
name: Marcotulli, Lea
name: Kaur, Aman
name: Rajagopal, Meenakshi
name: Ajello, Marco
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Fermi Large Area Telescope (Fermi-LAT) 3FHL catalog is the latest catalog of >10 GeV sources and will remain an important resource for the high-energy community for the foreseeable future. Therefore, it is crucial that this catalog is made complete by providing associations for most sources. In this paper, we present the results of the X-ray analysis of 38 3FHL sources. We found a single bright X-ray source in 20 fields, two sources each in two fields and none for the remaining 16. The analysis of the properties of the 22 3FHL fields with X-ray sources led us to believe that most (19/22) are of extra-galactic origin. A machine-learning algorithm was used to determine the source type and we find that 15 potential blazars are likely BL Lacertae objects (BL Lacs). This is consistent with the fact that BL Lacs are by far the most numerous population detected above >10 GeV in the 3FHL.