cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Saddle-shaped solar flare arcades
Creators: name: Lörinčík, Juraj
name: Dudík, Jaroslav
name: Aulanier, Guillaume
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Arcades of flare loops form as a consequence of magnetic reconnection powering solar flares and eruptions. We analyse the morphology and evolution of flare arcades that formed during five well-known eruptive flares. We show that the arcades have a common saddle-like shape. The saddles occur despite the fact that the flares were of different classes (C to X), occurred in different magnetic environments, and were observed in various projections. The saddles are related to the presence of longer, relatively-higher, and inclined flare loops, consistently observed at the ends of the arcades, which we term `cantles'. Our observations indicate that cantles typically join straight portions of flare ribbons with hooked extensions of the conjugate ribbons. The origin of the cantles is investigated in stereoscopic observations of the 2011 May 9 eruptive flare carried out by the Atmospheric Imaging Assembly (AIA) and Extreme Ultraviolet Imager (EUVI). The mutual separation of the instruments led to ideal observational conditions allowing for simultaneous analysis of the evolving cantle and the underlying ribbon hook. Based on our analysis we suggest that the formation of one of the cantles can be explained by magnetic reconnection between the erupting structure and its overlying arcades. We propose that the morphology of flare arcades can provide information about the reconnection geometries in which the individual flare loops originate.
description: 9 pages, 5 figures
The identification and characterization of genes in a candidate region for the Huntington’s disease gene
Creators: name: Collins II, Colin Conrad
Publisher: name: University of British Columbia
Year: 2009

description: Huntington’s disease (HD) is an autosomal dominant neurodegenerative disease affecting approximately 1/10,000 individuals. Progressive psychiatric disturbances, involuntary movement disorders, termed chorea, and dementia are clinical hallmarks of HD while, neuropathologically, a progressive loss of neurons throughout the central nervous system and in particular within the caudate nucleus of the basal ganglia is observed in HD. The gene responsible for HD was localized to chromosome band 4p16.3 in 1983, by genetic linkage and in situ hybridization studies. This thesis describes the delineation of a 50 kb HD gene candidate region, within chromosome 4p16.3, and the identification and characterization of two novel human genes mapping within that 50 kb interval. The chromosomes of a patient reported to carry a new mutation at the HD locus and those from 11 of her siblings were haplotyped revealing a distal 4pl6.3 recombination event in the affected individual. Because both new mutations at the HD locus, and distal 4p16.3 recombination events are rare, a hypothesis was formulated relating the recombination event to the occurrence of HD in the patient. In a test of this hypothesis a chromosome walk was performed to identify the site of postulated unequal recombination. In the course of the chromosome walk two restriction fragment length polymorphisms, informative in the sibship, were identified enabling a 500 kb HD candidate region, approximately 700 kb from the 4p telomere, to be narrowed to 80 kb. The molecular characterization of the 80 kb region ultimately reduced the interval to 50 kb and, moreover, revealed three putative CpG islands. Zoo blot analysis identified phylogenetically conserved DNA associated with two of these CpG islands suggesting the presence of encoded genes. The subsequent probing of cDNA libraries and Northern blots led to the identification and characterization of two genes encoding for the n-subunit of rod photoreceptor cGMP phosphodiesterase (PDEB) and a novel regulatory myosin light chain (MYL5). No evidence for an unequal recombination, within the 50 kb interval, was revealed by Southern blot analysis. Similarly, single strand conformational polymorphism (SSCP) analysis of PDEB and MYL5 genes failed to reveal evidence for the postulated mutation. These findings strongly suggest that the 4p16.3 recombination event is unrelated to the occurrence of HD in this sporadic case.
Η τέχνη και η καλλιέργεια του προφορικού λόγου του νηπίου στην προσχολική αγωγή
Creators: name: Λαμνή, Καλλιόπη Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ανάγνωση εικαστικών μορφών
Οπτικός αλφαβητισμός
Ανάπτυξη προφορικού λόγου
Reading visual forms
Visual Literacy
Development of spoken language

description: Η παρούσα εργασία ασχολείται με τη διδακτική προσέγγιση της τέχνης. Ο κύριος σκοπός της αποτελεί την καλλιέργεια του προφορικού λόγου του νηπίου, μέσα από την διδακτική προσέγγιση ανάγνωσης και ερμηνείας εικαστικού έργου τέχνης. Χρησιμοποιεί τη μεθοδολογική τεχνική του προγράμματος «Artful Thinking», του πανεπιστημίου του Harvard. Η πρωτοτυπία της εργασίας έγκειται στην επεξεργασία και των τριών πρώτων σταδίων ανάπτυξης της λειτουργίας της γλώσσας, καθώς και των τριών σταδίων ανάπτυξης της μεταλειτουργίας της γλώσσας. Η εργασία εκτείνεται σε τρία κεφάλαια, όπου στο πρώτο διερευνάται η τέχνη μέσα από τις ποικίλες λειτουργίες της, καθώς και η σύνδεση της με τις γνωστικές διεργασίες του ανθρώπου. Η τέχνη δεν είναι απλά μίμηση ή αντιγραφή, αλλά εννοιολογική συγκρότηση του κόσμου, έκφραση, λόγος και επικοινωνία. Ακριβώς τις ίδιες λειτουργίες αναπτύσσει και η γλώσσα, με την οποία ασχολείται το δεύτερο κεφάλαιο. Για τον λόγο αυτό στο τρίτο κεφάλαιο προτείνεται η σύνδεση τους, σε διδακτικές εκπαιδευτικές προσεγγίσεις. Ειδικά για την καλλιέργεια και όχι απλά την ανάπτυξη του προφορικού λόγου. Μέσα από την ανάγνωση των εικαστικών μορφών και του οπτικού αλφαβητισμού, ο λόγος υψώνεται σε υψηλές πνευματικά σφαίρες. Η εκπαίδευση μέσω τέχνης, αποτελεί το θέμα του τρίτου κεφαλαίου, στο οποίο αναφέρονται οι ωφέλειες από την ένταξη της τέχνης στους διδακτικούς σχεδιασμούς των εκπαιδευτικών και παρουσιάζεται μία διδακτική προσέγγιση καλλιέργειας του προφορικού λόγου, μέσα από την ανάγνωση εικαστικού έργου τέχνης στο Νηπιαγωγείο.
description: This project deals with the didactic approach to art. The main purpose is the development of the spoken language of the infant, through the teaching of reading and interpreting visual art project approach. The art teaching approach using the Harvard’s University methodological technique programme «Artful Thinking». The originality of this project is the processing of all the three first development stages of language’s operation and of the three development stages of language’s post functions. The work consists of three chapters. The first explores art through her various functions and also her connections of the human cognitive processes. Art is not simply imitating or copying the images of the world, is conceptual constitution of the world, expression, speech and communication. Language develops exactly the same functions, in which the second chapter deals. Education through art is the subject of the third chapter, reflecting the benefits of the integration of art in teaching plans of teachers. Also presents a teaching art approach of spoken language development through visual art project, in Kindergarten. The reading visual art forms and visual literacy rises the spoken language to high spiritual realms.
Statistics of Complex Wigner Time Delays as a counter of S-matrix poles: Theory and Experiment
Creators: name: Chen, Lei
name: Anlage, Steven M.
name: Fyodorov, Yan V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study the statistical properties of the complex generalization of Wigner time delay $τ_\text{W}$ for sub-unitary wave chaotic scattering systems. We first demonstrate theoretically that the mean value of the $\text{Re}[τ_\text{W}]$ distribution function for a system with uniform absorption strength $η$ is equal to the fraction of scattering matrix poles with imaginary parts exceeding $η$. The theory is tested experimentally with an ensemble of microwave graphs with either one or two scattering channels, and showing broken time-reversal invariance and variable uniform attenuation. The experimental results are in excellent agreement with the developed theory. The tails of the distributions of both real and imaginary time delay are measured and are also found to agree with theory. The results are applicable to any practical realization of a wave chaotic scattering system in the short-wavelength limit.
description: 8 pages, 3 figures. Supplementary material added
Prism international
Creators: name: Prism International
Publisher: name: Vancouver : The Creative Writing Program of the University of British Columbia
Year: 2024

description: The following description is provided by the publisher:
CONTENTS
 PART I
 told names | 9 Morgan Christie | Poetry
10 sweet bows | Morgan Christie| Poetry
11 Photographs| Zehra Naqvi | Poetry
12 Living Time | Jin-Me Yoon| Photography
 13 Accuracy Exercises| Mark Foss | Creative Non-Fiction
19 Language is Thankless Service | Samuel Samba | Poetry
21 pikokonêwêpayiw | Jesse Desjarlais| Poetry
23 Joy Tales 1 | Peter Olude | Photography
24here you are living | ij peña | Creative Non-Fiction
PART II
31 Honouring the Feather and the Fiddle I Heather Simeney MacLeod | Poetry
32 Oceanleaving | Daze Jefferies | Poetry
33 HYBRID EROTICA | Danielle Douez | Poetry
34 Dear Post-Partum | Beth Suter | Poetry
35 Artefacts of affects | Ashleigh A. Allen| Poetry
37 Relato de un Suicidio | Tuxamee / Irving Segovia | Collage Artwork
38 I Have to Tell this Quickly Because I Don't Know how Long it will Last | Liedewij Vogelzang| Flash Fiction
40 Welcome to the world, dear [son/daughter name]! | Jordan Abel |Poetry/Creative Non-Fiction/Visual Art
PART III
57 Still Life with the Confederate Flag (Peru, Illinois) | Katana Smith | Poetry
58 Terra Nullius | Jordan Redekop-Jones | Poetry
60 You, Me, Plums, Icebox | Zhanpei Fang | Painting
61 Drinking with George, Drinking with Both Feet | Tyler Finley | Fiction
72 Polluted | Dr. Deidra Suwanee Dees | Poetry
 73 Everyone at this fake wedding is thinking of ending things | Nick Richardson | Poetry
74 Mad Fragmentations: Transmissions from the Lost Archives of Trans History | KI Cerankowski | Creative Non-Fiction
PART IV
83 Panic Attack at Crews & Tangos | Em Dial | Poetry
85 It is Our Job to Burn Toast | Hannah Jenkins| Poetry
86 The Urn | Jaewuk Kim| Fiction
98 Self-Baptism in My Great-Grandmother's Bathroom | Jayde Officer | Poetry
100 Photography, translated | Kyo Lee | Poetry
102 Phenomenon | Gillian Sze | Poetry
103 Alexandra Sandbäck | (IM)MEASURABLE | Mixed Media Photography
104 Edward Pimlico | Daryl Bruce| Fiction
I have never been on a long journey across open water| Dharani Persaud| Poetry
112 Historia de una Tensión | Tuxamee / Irving Segovia | Collage
113 Boxes | Denisha Naidoo | Poetry
114 Negative Space | Judy LeBlanc | Creative Non-Fiction
116 Contributors
Spin filtering on a ring with Rashba hamiltonian
Creators: name: Harmer, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider a quantum graph consisting of a ring with Rashba hamiltonian and an arbitrary number of semi-infinite wires attached. We describe the scattering matrix for this system and investigate spin filtering for a three terminal device.
description: 6 figures
Mutational and functional analysis of the SPT2 gene of Saccharomyces cerevisiae
Creators: name: Lefebvre, Louis
Publisher: name: University of British Columbia
Year: 2009

description: The Saccharomyces cerevisiae SPT2 gene was identified by mutants which are suppressors of Ty and δ insertional mutations at the HIS4 locus. The ability of spt2 mutations to suppress the transcriptional interference caused by the δ promoter insertion his4-912 δ correlates with an increase in wild-type HIS4 mRNA levels. The SPT2 gene is identical to SIN1, which codes for a factor genetically defined as a negative regulator of HO transcription. Mutations in SPT2/SIN1 suppress the effects of trans-acting mutations in SWI genes and of partial deletions in the C-terminal domain of the largest subunit of RNA polymerase II. Nuclear localization and protein sequence similarities suggested that the SPT2/SIN1 protein may be related to the nonhistone chromosomal protein HMG1. In order to assess the significance of this structural similarity and identify domains of SPT2 functionally important in the regulation of his4-912 δ I have studied recessive and dominant spt2 mutations created by in vitro mutagenesis. Several alleles carrying C-terminal deletions as well as point mutations in the C-terminal domain of the SPT2 protein exhibit a dominant suppressor phenotype. C-terminal basic residues necessary for wild-type SPT2 protein function which are absent from HMG1 have been identified. The competence of these mutant SPT2 proteins to interfere with the maintenance of the His⁻(Spt⁺) phenotype of a his4-912 δ strain is lost by deletion of internal HMG1-like sequences and is sensitive to the wild-type SPT2⁺ gene dosage. Using cross-reacting antipeptide polyclonal antibodies, I demonstrate that the intracellular level of the wild-type SPT2 protein is not affected in the presence of dominant mutations and furthermore that the reversion of the dominance by internal deletion of HMG1-like sequences is not mediated by altered production or stability of the mutant polypeptides. The results suggest that the products of dominant alleles directly compete with the wild-type protein. On the basis of primary sequence similarities, it is proposed that a HMG-box-like motif is required for SPT2 function in vivo and that this motif also is necessary for the dominant suppressor phenotype exhibited by some mutant SPT2 alleles.
Θωμάς Κοροβίνης, Θεσσαλονίκη 1912 – 2012: Μέσα στα στενά σου τα σοκάκια…: Ένα παράδειγμα λογοτεχνικού ημερολογίου.
Creators: name: Γερασοπούλου, Μαριάνθη Στέφανου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Θωμάς Κοροβίνης
Θεσσαλονίκη-Λογοτεχνικό ημερολόγιο
Thomas Korovinis
Thessaloniki-Literary journal

description: Σκοπός της διατριβής ήταν η καταγραφή των λογοτεχνικών κειμένων, πεζογραφίας και ποίησης, Ελλήνων συγγραφέων, οι οποίοι αναφέρονται στην πόλη της Θεσσαλονίκης. Το υλικό αυτό περιλαμβάνεται στο βιβλίο του Θωμά Κοροβίνη, Θεσσαλονίκη 1912 – 2012 : Μέσα στα στενά σου τα σοκάκια…, το οποίο έχει επετειακό χαρακτήρα και εκδόθηκε με αφορμή τη συμπλήρωση εκατό χρόνων από την απελευθέρωση της πόλης. Η εργασία, η οποία χωρίζεται σε δύο μέρη, επιχειρεί στο πρώτο μέρος μία θεωρητική προσέγγιση του θέματος, εξετάζοντας αρχικά τα γραμματειακά είδη του ημερολογίου και της ανθολογίας, ενώ στη συνέχεια γίνεται μια αναδρομή στη λογοτεχνική ιστορία της πόλης, καθώς και στην πόλης ως λογοτεχνικού τόπου, δηλαδή τη διερεύνηση του τρόπου με τον οποίο ο τόπος ως φυσικό μέγεθος περνάει στη λογοτεχνία. Στο δεύτερο μέρος της, τίθενται στο επίκεντρο τα λογοτεχνικά κείμενα, που ανθολογούνται στο βιβλίο του Θωμά Κοροβίνη, και ο τρόπος που αυτά «μιλούν» για την πόλη. Τέλος, γίνεται η αξιολόγηση της ανθολογίας στο σύνολό της βάσει επιστημονικών – φιλολογικών κριτηρίων.
description: The aim of the dissertation is the record of literary works such as prose and poetry about the city of Thessaloniki by Greek writers. The material used includes Thomas Korovinis’s book “Thessaloniki 1912 – 2012 : In your narrow alleys…”, which was published in the 100th anniversary of the liberation of Thessaloniki. The study is divided into two parts. In the first part, there is a theoretical approach of the issue while exploring literature genres such as journals and anthologies. What follows next is a flashback in time to investigate the literary history of the city as well as the city itself as a literary place (topos) and the way it is depicted in literature. In the second part, the literary texts, anthologized in Thomas Korovinis’s book, are in the centre of discussion along with the way they reflect upon the city. At the end, there is an evaluation of the anthology based on scientific and philological criteria.
Class elicitation session on lexical clarifications
Creators: name: Massoma, Achille
name: Hyman, Larry M.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: abb

description: Checking tones of verbs/some new nouns: 'beat', 'beg', 'begin', 'bite', 'break', 'branch' (v?), 'buy', 'call', 'read' (=fry), 'carve', 'catch', 'have', 'choose', 'arrive/come', 'want' ('I want..'), 'cough', 'count', 'cry', 'dance', 'descend', 'die', 'sand', 'tomb(s)', 'enter', 'feed', 'make fall', 'oil', 'pen', 'receive', 'finish', 'fly', 'give', 'leave', 'go away!', 'leave me!'; nouns: 'death', 'devil' (=good spirit), 'ghost', 'good spirit', 'good heart', 'distance', 'close' (intimate), 'close' (near), 'close' vs. 'far', 'dream'; checking new vocab from Greg and Rachele: 'slowly/small', 'fast', 'exceed/pass' (and some tense/aspect distinctions between stative vs. past tense of 'exceed/past'), 'add', 'bread', 'light'; new Vocab: 'dry season', 'rainy season', 'bean/pumpkin seed'(?)/'fish dish' (for 'egusi').
Additional file 1 of Peer support for carers and patients with inflammatory bowel disease: a systematic review
Creators: name: Adriano, Ada
name: Thompson, Dean M.
name: McMullan, Christel
name: Price, Malcolm
name: Moore, David
name: Booth, Lesley
name: Mathers, Jonathan
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Additional file 1: Supplementary Table 1. PRISMA 2020 Checklist. Supplementary Table 2. Search strategy for MEDLINE. Supplementary Table 3. Excluded studies and reason for exclusion. Supplementary Table 4. Risk of bias assessment. Supplementary Table 5. Health-related quality of life (HRQoL) in RCTs and non-randomised studies. Supplementary Table 6. Health-related quality of life (HRQoL) for before-and-after studies. Supplementary Table 7. Anxiety and depression in RCTs and non-randomised studies. Supplementary Table 8. Anxiety and depression in before-and-after studies. Supplementary Table 9. Patient education and knowledge about the illness. Supplementary Table 10. Other outcomes measured in RCTs. Supplementary Table 11. Other outcomes measured in before-and-after studies.
Μελέτη της αντοχής στην οξείδωση των εργαλειοχαλύβων Sleipner και Orvar με τη μέθοδο της Θερμικής Ανάλυσης και έλεγχος της διαβρωτικής τους συμπεριφοράς με Ηλεκτροχημικές Δοκιμές.
Creators: name: Μπέτα, Βασιλική Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Εργαλειοχάλυβες
Οξείδωση
Διάβρωση
Tool steels
Oxidation
Corrosion

description: Οι εργαλειοχάλυβες χρησιμοποιούνται ως κατασκευαστικά υλικά και η ευρεία εφαρμογή τους αποδίδεται στις ειδικές μηχανικές ιδιότητες τους σε συνδυασμό με το χαμηλό κόστος και τη μεγάλη τους διαθεσιμότητα. Ωστόσο, η έκθεσή τους σε έντονα οξειδωτικές και διαβρωτικές συνθήκες, έχει σαν συνέπεια την υποβάθμισή τους. Εξαιτίας των καλών μηχανικών τους ιδιοτήτων, οι εργαλειοχάλυβες χρησιμοποιούνται σε πολλές εφαρμογές όπου απαιτείται η αντίστασή τους στην οξείδωση και τη διάβρωση. Τέτοιες εφαρμογές είναι τα καλούπια χύτευσης, οι μήτρες σφυρηλάτησης και οι μήτρες διέλασης. Στόχος της παρούσας εργασίας, είναι να μελετηθεί ο μηχανισμός και η αντοχή στην οξείδωση των εργαλειοχαλύβων Sleipner και Orvar με τη μέθοδο της Θερμικής Ανάλυσης και να γίνει ο χαρακτηρισμός τους με Φασματοσκοπία IR, Περίθλαση Ακτίνων-Χ και Ηλεκτρονική Μικροσκοπία Σαρώσεως. Επιπλέον, πραγματοποιήθηκε και ο έλεγχος των δύο εργαλειοχαλύβων ως προς την διαβρωτική τους συμπεριφορά με Ηλεκτροχημικές Δοκιμές.
description: Tool steels are widely used as construction materials and their wide application is attributed to their special mechanical properties combined with low cost and high availability. However, exposure to highly oxidative and corrosive conditions, results in their degradation. Due to their good mechanical properties, tool steels are required in many mechanical devices. Moreover, the oxidation and corrosion resistance is also required in most of these applications, such as casting and forging dies, blades for hot shearing, and hot extrusion tools. The aim of this study is the examination of the oxidation performance and resistance of Sleipner and Orvar tool steels by thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction and scanning electron microscopy (SEM). Furthermore, both tool steels were examined for their corrosive behavior by Electrochemical Tests.
description: Σε συνεργασία με το Ινστιτούτο Τεχνολογίας Γκρενόμπλ (Γαλλία), το ΕΚΕΦΕ Δημόκριτος, και το CNRS (Centre National de la Researche Scientifique, Γαλλία)
MOESM2 of Immunogenicity analysis of genetically conserved segments in Plasmodium ovale merozoite surface protein-8
Creators: name: Zhang, Xinxin
name: Chu, Ruilin
name: Xu, Sui
name: Fu, Haitian
name: Tang, Jianxia
name: Chen, Limei
name: Shi, Xiaodan
name: Chen, Jing
name: Li, Yuhong
name: Zhu, Guoding
name: Han, Eun-Taek
name: Xuan, Yinghua
name: Cao, Jun
name: Cheng, Yang
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Evolutionary Biology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Additional file 2: Figure S1. Amino acid sequence alignment of P. ovale MSP-8 full length. a P. ovale curtisi. b P. ovale wallikeri.
Ultracold Bosons in a Tilted Multi-level Double-Well Potential
Creators: name: Dounas-Frazer, D. R.
name: Hermundstad, A. M.
name: Carr, L. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The N -body problem in a double well requires new features for quantum information processing, macroscopic quantum superposition, and other fundamental studies of quantum many body physics in ultracold atoms. One needs (a) tilt, and (b) to go beyond the single-particle ground state in each well, i.e., to two or more energy levels. For (a), we show that a small potential difference between the wells, or tilt, causes the decoherence of Schrodinger cat states. However, these states reappear when the tilt can be compensated by atom-atom interactions; these tilted cat states constitute partial cats that are protected from decoherence by the many body wavefunction. For (b), we provide explicit criteria for when two energy levels are needed to describe the state space. For typical experimental parameters, two levels are indeed required for creation of cat states.
description: 4 pages, 3 figures
New aspects of the purity and information of an entangled qubit pair
Creators: name: Metwally, Nasser
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this article, we investigate the purity dynamics of entangled 2 two-level atoms interacting with a single quantized electromagnetic field. We show that the purity of the qubit pairs depends on the initial state of the atomic system. It is found that the superposition case is the best choice to generate entangled states with high purity and hence high entanglement. It is clear that the purity of one qubit can be purified at the expense of the other pair through the phenomena of purity swapping. The mean photon number plays an important role in increasing the purity. The robustness of the quantum channel is investigated in the presence of individual attacks, where we study the separability of these channels and evaluate its fidelity. Finally, we use the partial entangled states as quantum channels to perform the original coding protocol. We find that Bob can obtain the coded information with reasonable percentage. The inequality of security is tested, where we determine the interval of times in which Alice and Bob can communicatesecurely. These intervals depend on the type of error and the structure of the initial atomic system
Holographic currents in first order Gravity and finite Fefferman-Graham expansions
Creators: name: Banados, Maximo
name: Miskovic, Olivera
name: Theisen, Stefan
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the holographic currents associated to Chern-Simons theories. We start with an example in three dimensions and find the holographic representations of vector and chiral currents reproducing the correct expression for the chiral anomaly. In five dimensions, Chern-Simons theory for AdS group describes first order gravity and we show that there exists a gauge fixing leading to a finite Fefferman-Graham expansion. We derive the corresponding holographic currents, namely, the stress tensor and spin current which couple to the metric and torsional degrees of freedom at the boundary, respectively. We obtain the correct Ward identities for these currents by looking at the bulk constraint equations.
description: 21 pages; version published in JHEP
Small Instantons in $CP^1$ and $CP^2$ Sigma Models
Creators: name: Lian, Yaogang
name: Thacker, H. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The anomalous scaling behavior of the topological susceptibility $χ_t$ in two-dimensional $CP^{N-1}$ sigma models for $N\leq 3$ is studied using the overlap Dirac operator construction of the lattice topological charge density. The divergence of $χ_t$ in these models is traced to the presence of small instantons with a radius of order $a$ (= lattice spacing), which are directly observed on the lattice. The observation of these small instantons provides detailed confirmation of Lüscher's argument that such short-distance excitations, with quantized topological charge, should be the dominant topological fluctuations in $CP^1$ and $CP^2$, leading to a divergent topological susceptibility in the continuum limit. For the $\CP$ models with $N>3$ the topological susceptibility is observed to scale properly with the mass gap. These larger $N$ models are not dominated by instantons, but rather by coherent, one-dimensional regions of topological charge which can be interpreted as domain wall or Wilson line excitations and are analogous to D-brane or ``Wilson bag'' excitations in QCD. In Lorentz gauge, the small instantons and Wilson line excitations can be described, respectively, in terms of poles and cuts of an analytic gauge potential.
description: 33 pages, 12 figures
MHD Simulations of Accretion onto Sgr A*: Quiescent Fluctuations, Outbursts, and Quasi-Periodicity
Creators: name: Chan, Chi-kwan
name: Liu, Siming
name: Fryer, Christopher L.
name: Psaltis, Dimitrios
name: Ozel, Feryal
name: Rockefeller, Gabriel
name: Melia, Fulvio
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: High resolution observations of Sgr A* have revealed a wide variety of phenomena, ranging from intense rapid flares to quasi-periodic oscillations, making this object an ideal system to study the properties of low luminosity accreting black holes. In this paper, we use a pseudo-spectral algorithm to construct and evolve a three-dimensional magnetohydrodynamic model of the accretion disk in Sgr A*. Assuming a hybrid thermal-nonthermal emission scheme, we show that the MHD turbulence can by itself only produce factor of two fluctuations in luminosity. These amplitudes in variation cannot explain the magnitude of flares observed in this system. However, we also demonstrate that density perturbations in the disk do produce outbursts qualitatively similar to those observed by XMM-Newton in X-rays and ground-based facilities in the near infrared. Quasi-periodic oscillations emerge naturally in the simulated lightcurves. We attribute these to non-axisymmetric density perturbations that emerge as the disk evolves back toward its quiescent state.
description: 13 pages including 12 figures, submitted to ApJ, comments welcome
Sub-wavelength imaging at infrared frequencies using an array of metallic nanorods
Creators: name: Silveirinha, Mario G.
name: Belov, Pavel A.
name: Simovski, Constantin R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We demonstrate that an array of metallic nanorods enables sub-wavelength (near-field) imaging at infrared frequencies. Using an homogenization approach, it is theoretically proved that under certain conditions the incoming radiation can be transmitted by the array of nanorods over a significant distance with fairly low attenuation. The propagation mechanism does not involve a resonance of material parameters and thus the resolution is not strongly affected by material losses and has wide bandwidth. The sub-wavelength imaging with $λ/10$ resolution by silver rods at 30 THz is demonstrated numerically using full-wave electromagnetic simulator.
description: 12 pages, 16 figures, submitted to PRB
Face processing limitation to own species in primates: a comparative study in brown capuchins, Tonkean macaques and humans
Creators: name: Dufour, Valerie
name: Pascalis, Olivier
name: Petit, Odile
Publisher: name: arXiv
Year: 2007
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Most primates live in social groups which survival and stability depend on individuals' abilities to create strong social relationships with other group members. The existence of those groups requires to identify individuals and to assign to each of them a social status. Individual recognition can be achieved through vocalizations but also through faces. In humans, an efficient system for the processing of own species faces exists. This specialization is achieved through experience with faces of conspecifics during development and leads to the loss of ability to process faces from other primate species. We hypothesize that a similar mechanism exists in social primates. We investigated face processing in one Old World species (genus Macaca) and in one New World species (genus Cebus). Our results show the same advantage for own species face recognition for all tested subjects. This work suggests in all species tested the existence of a common trait inherited from the primate ancestor: an efficient system to identify individual faces of own species only.
Αντισταθμιστική αγωγή και διαπολιτισμική εκπαίδευση: συγκλίσεις και αποκλίσεις στο δημοτικό σχολείο
Creators: name: Μαρίνη, Μαρία Θεόδωρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Αντισταθμιστική αγωγή
Διαπολιτισμική εκπαίδευση
Δημοτικό σχολείο
Compensatory agoge
Intercultural education
Primary school

description: H παρούσα εργασία, αποτελεί μια προσπάθεια σύγκρισης μεταξύ της Αντισταθμιστικής αγωγής και της Διαπολιτισμικής εκπαίδευσης. Εντός της εργασίας, παρατίθενται λεπτομερώς, τα χαρακτηριστικά καθεμιάς εκ των δύο, ενώ απώτερος σκοπός της έρευνάς μας είναι η διαπίστωση των μεταξύ τους συγκλίσεων και αντιθέσεων. Είναι γεγονός, ότι οι συνεχώς μεταβαλλόμενες κοινωνικο- οικονομικές συνθήκες επηρεάζουν και την μορφή της εκπαίδευσης. Για τον λόγο αυτό, επιχειρείται η εξέταση των συνθηκών που καθορίζουν την εξέλιξη και την πρόοδο των μαθητών με στόχο την πρόταση μιας λύσης που θα προϋποθέτει την καλύτερη δυνατή αξιοποίηση των μέσων που δίνονται στους εκπαιδευτικούς . Επιπλέον στο ερευνητικό μέρος της εργασίας, επιχειρείται μια πιο σφαιρική προσέγγιση του θέματος, καθώς οι εκπαιδευτικοί καλούνται να σχηματίσουν το προφίλ κάθε τύπου εκπαίδευσης και μάλιστα μέσω αυτής της διαδικασίας διαφαίνεται η στάση που υιοθετούν σε κάθε περίπτωση.
description: This paper is an attempt to compare Compensatory education and Intercultural education. Within the framework of this study, the characteristics of each type are recorded in detail, while the ultimate goal of our research is to discover the convergences and contrasts between them. It is a fact that the constantly changing socio-economic conditions influence the form of education as well. For this reason, an effort to examine the conditions that determine the development and progress of pupils is made, with a view to proposing a solution that presupposes the best possible use of resources given to teachers. In addition to the research part, we attempt a more global approach to the matter, as teachers are required to form the outline of each type of teaching, and, through this process, the attitude they adopt in each situation is shown.
Συγκριτική μελέτη αμφιβόλων με φασματοσκοπικές μεθόδους
Creators: name: Σεραφειμίδου, Φωτεινή Συμεών
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Αμφίβολοι
Ορυκτά
Φασματοσκοπικές μέθοδοι
Amphiboles
Minerals
Spectroscopic methods

description: Αντικείμενο της παρούσας διπλωματικής εργασίας είναι η μελέτη αμφιβόλων, δηλαδή ορυκτών με διάφορες φασματοσκοπικές μεθόδους όπως είναι η Ηλεκτρονική Μικροσκοπία Σάρωσης (SEM), η Φασματοσκοπία Υπερύθρου με Μετασχηματισμό Fourier (FTIR) και η Περίθλαση Ακτίνων Χ (XRD). Η Οπτική Μικροσκοπία , η μελέτη της μικρο-μορφολογίας και η στοιχειακή ανάλυση των δειγμάτων πραγματοποιήθηκε στο Εργαστήριο Ηλεκτρονικής Μικροσκοπίας Σάρωσης (SEM).Οι μετρήσεις με την τεχνική της Φασματοσκοπίας Υπερύθρου (FTIR) πραγματοποιήθηκαν στο Εργαστήριο Φασματοσκοπίας του Τμήματος Φυσικής ενώ οι μετρήσεις με την τεχνική Περίθλασης Ακτίνων Χ πραγματοποιήθηκαν στο Εργαστήριο Ακτίνων Χ του Τμήματος Φυσικής. Εξετάστηκαν τέσσερα είδη ορυκτών τα οποία τα χαρακτηρίσαμε μακροσκοπικά και αργότερα τα πιστοποιήσαμε με βάση τα αποτελέσματα που λήφθηκαν απο τις παραπάνω μεθόδους. Κάθε μέθοδος μελετήθηκε ξεχωριστά και το σύνολο των αποτελεσμάτων σχολιάζεται και εξάγεται στα αντίστοιχα συμπεράσματα.
description: The subject of this Diploma Thesis is the study of amphiboles with spectroscopic methods such as SEM, FTIR and XRD. The study of optical microscopy, micro-morphology and elemental analysis of the samples was performed at the Scanning Electron Microscopy Laboratory (SEM). Measurements with the technique of micro-FTIR spectroscopy were performed at the Laboratory of Spectroscopy of Physics Department and measurements of diffraction X-rays were performed at Laboratory of X-rays of Physics Department. Four minerals were examined which are described from their external appearance firstly, and then they are identified by the results of the above mentioned methods. Each method is studied separately and all the results discussed and exported in the corresponding conclusions.
description: Σε συνεργασία με το Ινστιτούτο Τεχνολογίας Γκρενόμπλ (Γαλλία), το ΕΚΕΦΕ Δημόκριτος, και το CNRS (Centre National de la Researche Scientifique, Γαλλία)
Nonlinear spectroscopy of photons bound to one atom
Creators: name: Schuster, I.
name: Kubanek, A.
name: Fuhrmanek, A.
name: Puppe, T.
name: Pinkse, P. W. H.
name: Murr, K.
name: Rempe, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Optical nonlinearities typically require macroscopic media, thereby making their implementation at the quantum level an outstanding challenge. Here we demonstrate a nonlinearity for one atom enclosed by two highly reflecting mirrors. We send laser light through the input mirror and record the light from the output mirror of the cavity. For weak laser intensity, we find the vacuum-Rabi resonances. But for higher intensities, we find an additional resonance. It originates from the fact that the cavity can accommodate only an integer number of photons and that this photon number determines the characteristic frequencies of the coupled atom-cavity system. We selectively excite such a frequency by depositing at once two photons into the system and find a transmission which increases with the laser intensity squared. The nonlinearity differs from classical saturation nonlinearities and is direct spectroscopic proof of the quantum nature of the atom-cavity system. It provides a photon-photon interaction by means of one atom, and constitutes a step towards a two-photon gateway or a single-photon transistor.
description: 7 figures, Nature Physics
Formation of dwarf galaxies and small-scale problems of CDM
Creators: name: Gnedin, Oleg Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The concordance cosmological model based on cold dark matter makes definitive predictions for the growth of galaxies in the Universe, which are being actively studied using numerical simulations. These predictions appear to contradict the observations of dwarf galaxies. Dwarf dark matter halos are more numerous and have steeper central density profiles than the observed galaxies. The first of these small-scale problems, the "missing satellites problem", can be resolved by accounting for the low efficiency of gas cooling and star formation in dwarf halos. A newly-discovered class of HyperVelocity Stars will soon allow us to test another generic prediction of CDM models, the triaxial shapes of dark matter halos. Measuring the proper motions of HVS will probe the gravitational potential out to 100 kpc and will constrain the axis ratios and the orientation of the Galactic halo.
description: invited talk at IAU Symposium 235, Prague, August 2006
Criticality and Scaling Relations in a Sheared Granular Material
Creators: name: Hatano, Takahiro
name: Otsuki, Michio
name: Sasa, Shin-ichi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate a rheological property of a dense granular material under shear. By a numerical experiment of the system with constant volume, we find a critical volume fraction at which the shear stress and the pressure behave as power-law functions of the shear strain rate. We also present a simple scaling argument that determines the power-law exponents. Using these results, we interpret a power-law behavior observed in the system under constant pressure.
description: 4 pages, 4 figures
Partially Massless Spin 2 Electrodynamics
Creators: name: Deser, S.
name: Waldron, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose that maximal depth, partially massless, higher spin excitations can mediate charged matter interactions in a de Sitter universe. The proposal is motivated by similarities between these theories and their traditional Maxwell counterpart: their propagation is lightlike and corresponds to the same Laplacian eigenmodes as the de Sitter photon; they are conformal in four dimensions; their gauge invariance has a single scalar parameter and actions can be expressed as squares of single derivative curvature tensors. We examine this proposal in detail for its simplest spin 2 example. We find that it is possible to construct a natural and consistent interaction scheme to conserved vector electromagnetic currents primarily coupled to the helicity 1 partially massless modes. The resulting current-current single ``partial-photon'' exchange amplitude is the (very unCoulombic) sum of contact and shorter-range terms, so the partial photon cannot replace the traditional one, but rather modifies short range electromagnetic interactions. We also write the gauge invariant fourth-derivative effective actions that might appear as effective corrections to the model, and their contributions to the tree amplitude are also obtained.
description: 15 pages, LaTeX
Second-Order Elliptic Integro-Differential Equations: Viscosity Solutions' Theory Revisited
Creators: name: Barles, Guy
name: Imbert, Cyril
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35D99, 35J60, 35B05, 47G20

description: The aim of this work is to revisit viscosity solutions' theory for second-order elliptic integro-differential equations and to provide a general framework which takes into account solutions with arbitrary growth at infinity. Our main contribution is a new Jensen-Ishii's Lemma for integro-differential equations, which is stated for solutions with no restriction on their growth at infinity. The proof of this result, which is of course a key ingredient to prove comparison principles, relies on a new definition of viscosity solution for integro-differential equation (equivalent to the two classical ones) which combines the approach with test-functions and sub-superjets.
Επίδραση κλιματικής αλλαγής στην παράκτια ζώνη
Creators: name: Μαργώνης, Αντώνιος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Κλιματική Αλλαγή
Παράκτια ζώνη
Άγιος Νικήτας
Climate Change
Coastal zone
Agios Nikitas

description: Στα πλαίσια της παρούσας διπλωματικής εργασίας εξετάστηκε η επίδραση της κλιματικής αλλαγής στην παράκτια ζώνη. Η κλιματική αλλαγή θεωρείται πλέον αποδεδειγμένη από την επιστημονική κοινότητα λόγω των μεγάλων παρατηρούμενων παγκόσμιων μεταβολών στις τελευταίες δεκαετίες. Οι εκτιμήσεις κάνουν λόγο για αύξηση της θερμοκρασίας του πλανήτη που θα οδηγήσει σε αύξηση της στάθμης θάλασσας,κυρίως λόγω του λιώσιμου των πάγων, αποτελώντας άμεσο κίνδυνο για τις παράκτιες περιοχές. Επιπροσθέτως, αλλαγές στην συχνότητα, διεύθυνση και ένταση των ανέμων που έχουν ήδη ξεκινήσει να γίνονται αισθητές, προκαλούν αλλαγές στην κυματική κυκλοφορία και τη δημιουργία παράκτιων ρευμάτων και άρα την παράκτια στερεομεταφορά. Για την εκπόνηση της διπλωματικής χρησιμοποιήθηκαν υπολογιστικά μοντέλα τα οποία προσομοιώνουν το κυματικό καθεστώς και τη στερεοπαροχή μιας παράκτιας περιοχής. Τα μοντέλα αυτά βασίζονται στις προσεγγιστικές λύσεις γνωστών εξισώσεων όπως τις εξισώσεις συνέχειας και ισορροπίας. Τοποθεσία εφαρμογής επιλέχθηκε η παράκτια ζώνη του Άγιου Νικήτα που βρίσκεται στις βορειοδυτικές ακτές της νήσου Λευκάδας και αντιμετωπίζει τις τελευταίες δεκαετίες έντονο πρόβλημα διάβρωσης. Ως δεδομένα για την προσομοίωση των μελλοντικών συνθηκών που θα επικρατούν στην περιοχή χρησιμοποιήθηκαν οι εκτιμήσεις που παρουσιάστηκαν στο ερευνητικό έργο ΘΑΛΗΣ, αποτέλεσμα συνεργασίας πολλών ελληνικών πανεπιστημίων. Τέλος, προτάθηκε έργο προστασίας της ακτής του Αγ. Νικήτα με την κατασκευή κυματοθραυστών και ελέγχθηκε η αποτελεσματικότητά του με τη βοήθεια των υπολογιστικών μοντέλων.
description: In this work the impact of Climate Change in the coastal zone was examined. Climate Change is now considered proven by the scientific community due to the numerous globally observed climate changes in the last decades. Estimates show a rise in global temperature which leads to sea level rise, mostly due to ice melting, constituting immediate danger to coastal areas. Additionally, changes in the frequency, intension and direction of winds, that has already been perceptible, cause changes in wave circulation and coastal currents and thus coastal sediment. For the purpose of this study specific computational models were used that simulate wave system and sediment of a coastal zone. These models are based on approximate solutions of known equations as the equation of continuity and equilibrium. The study area for this work was the coastal zone of Agios Nikitas, located on the northwest coast of the island of Lefkada, experiencing intense erosion problems within the last decades. Input used for the simulation of future conditions in the area was the estimate datasets presented in the research project “THALES CCSEAWAVS”, a collaboration of several Greek universities. Finally, a coastal management project was proposed, including a construction of four breakwaters, and was tested for efficiency using computational models.
Στάσεις, πρακτικές και προσδοκίες γονέων πολιτισμικά διαφερόντων μαθητών και εκπαιδευτικών για τον συμβουλευτικό ρόλο του εκπαιδευτικού σε ζητήματα γονικής εμπλοκής
Creators: name: Ηλιάκη, Μαρία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: γονείς πολιτισμικά διαφερόντων μαθητών
γονική εμπλοκή
συμβουλευτικός ρόλος του εκπαιδευτικού
cultural diverse parents
parental involvement
teacher as consultant

description: Σκοπός της διατριβής ήταν η μελέτη της εμπλοκής γονέων πολιτισμικά διαφερόντων μαθητών στην εκπαίδευση των παιδιών τους και του συμβουλευτικού ρόλου του εκπαιδευτικού σε ζητήματα γονικής εμπλοκής. Εξετάσαμε τις στάσεις και τις πρακτικές των γονέων πολιτισμικά διαφερόντων μαθητών, των Ελλήνων γονέων και των εκπαιδευτικών σε θέματα γονικής εμπλοκής. Επίσης εξετάσαμε τις προσδοκίες των γονέων των πολιτισμικά διαφερόντων μαθητών, των Ελλήνων γονέων και των εκπαιδευτικών αναφορικά με τον συμβουλευτικό ρόλο του εκπαιδευτικού για μια αποτελεσματική επικοινωνία μεταξύ σχολείου και οικογένειας. Στη συνέχεια παρουσιάσαμε αναλυτικά τις στάσεις, τις πρακτικές και τις προσδοκίες τους. Ακόμη αναφερθήκαμε αναλυτικά στην ύπαρξη διαφοροποιήσεων ως προς τις στάσεις, πρακτικές και προσδοκίες μεταξύ των γονέων και μεταξύ των γονέων των πολιτισμικά διαφερόντων μαθητών και των εκπαιδευτικών. Ένα άλλο θέμα που θίξαμε ήταν διαμόρφωση του προφίλ του εκπαιδευτικού ως συμβούλου σε ζητήματα γονικής εμπλοκής.
description: The aim of the present thesis was the study of the involvement of cultural diverse parents in their children’s education and the teacher’ s role as consultant in issue of parental involvement. We examined the cultural diverse patents’, Greek parents’ and teachers’ attitudes and practices towards parental involvement. Furthermore, we studied the cultural diverse parents’, Greek parents’ and teachers’ expectations about the teacher as consultant in order to achieve an effective communication between school and family. Then we presented the features of their attitudes, practices and expectations. Another aim of this study was to analyze the existence of variable concerning the attitudes, practices and expectations between parents and between cultural diverse parents and teachers. We also examined the formulation of the teachers’ profile as consultant in subject of parental involvement.