cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Observation of 4- and 6-magnon bound-states in the spin-anisotropic frustrated antiferromagnet FeI$_2$
Creators: name: Legros, Anaëlle
name: Zhang, Shang-Shun
name: Bai, Xiaojian
name: Zhang, Hao
name: Dun, Zhiling
name: Phelan, W. Adam
name: Batista, Cristian D.
name: Mourigal, Martin
name: Armitage, N. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Spin-waves e.g. magnons are the conventional elementary excitations of ordered magnets. However, other possibilities exist. For instance, magnon bound-states can arise due to attractive magnon-magnon interactions and drastically impact the static and dynamic properties of materials. Here, we demonstrate a zoo of distinct multi-magnon quasiparticles in the frustrated spin-1 triangular antiferromagnet FeI$_2$ using time-domain terahertz spectroscopy. The energy-magnetic field excitation spectrum contains signatures of one-, two-, four- and six-magnon bound-states, which we analyze using an exact diagonalization approach for a dilute gas of interacting magnons. The two-magnon single-ion bound states occur due to strong anisotropy and the preponderance of even higher order excitations arises from the tendency of the single-ion bound states to themselves form bound states due to their very flat dispersion. This menagerie of tunable interacting quasiparticles provides a unique platform in a condensed matter setting that is reminiscent of the few-body quantum phenomena central to cold-atom, nuclear, and particle physics experiments.
Συγκριτικά Πλεονεκτήματα και Τάσεις Εξειδίκευσης στην Βιομηχανία της Κεντρικής Μακεδονίας:
Creators: name: Ανδρονίκου, Μαρία Ευστρατίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Συγκριτικά πλεονεκτήματα
Δείκτης εμπορικής απόδοσης
Κεντρική Μακεδονία
Comparative advantages
Trade performance index
Central Macedonia

description: Η παρούσα διπλωματική εργασία πραγματεύεται τα συγκριτικά πλεονεκτήματα και τις τάσεις εξειδίκευσης που φαίνεται να έχει η Βιομηχανία της Περιφέρειας της Κεντρικής Μακεδονίας. Ο προσδιορισμός τους επιχειρείται να γίνει μέσω των διεθνώς χρησιμοποιημένων δεικτών του Διεθνούς Κέντρου Εμπορίου (ITC) συγκρίνοντας την εικόνα που προκύπτει για την Κεντρική Μακεδονία με αυτήν της υπόλοιπης Ελλάδας. Η Περιφέρεια Κεντρικής Μακεδονίας διαθέτει σημαντική παραγωγική βάση σε κλάδους μεταποίησης σημειώνοντας υψηλά ποσοστά παραγωγής και εξαγωγών σε σχέση με άλλες περιφέρειες της Ελλάδος. Ο τομέας της βιομηχανίας αποτελεί βασική πηγή ανάπτυξης και βελτίωσης της ανταγωνιστικότητας της, από τον οποίο μπορούν να αναδυθούν σημαντικά ανταγωνιστικά πλεονεκτήματα για αυτήν. Τα ουσιώδη και διαρθρωτικά προβλήματα όμως που σαφώς υπάρχουν δυσκολεύουν την πλήρη ανάδειξη τους και προκειμένου να αναδειχθούν λύσεις προς αντιμετώπιση τους, καταλήγουμε σε μια σειρά από προτάσεις πολιτικής κινούμενες πρωτίστως στο πλαίσιο ανάπτυξης μέσω της καινοτομίας. Το κύριο ερώτημα πάντως που αναμένεται να απαντηθεί σε αυτήν την εργασία είναι πού κυρίως εντοπίζονται τα συγκριτικά πλεονεκτήματα της Περιφέρειας Κεντρικής Μακεδονίας και κατά πόσο αυτά με τις κατάλληλες αναπτυξιακές στρατηγικές μπορούν να την οδηγήσουν σε τροχιά μελλοντικής ανάπτυξης.
description: The present thesis is about the comparative advantages and the specialization trends that the Industry of Region of Central Macedonia is presented to have. It is attempted their determination to become via the internationally used indicators of International Centre of Trade (ITC) comparing the picture that results for Central Macedonia with that of remainder Greece. The Region of Central Macedonia has a significant production base in manufacturing sectors recording high rates of production and exports relative to other regions of Greece. The industrial sector is a key source of growth and competitiveness from which can emerge significant competitive advantages. However, the structural problems make it difficult to prove their existence and in order to identify solutions to these problems, various policy proposals are suggested, the majority of which are about growth through innovation. The main question that is expected to be answered in this dissertation is mainly where the comparative advantages of Central Macedonia may be detected and whether they can lead to a future growth path through development strategies.
Στατιστική ανάλυση fractal σημειακών διαδικασιών: εφαρμογή στη σεισμολογία
Creators: name: Κώττη, Ελευθερία Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Fractal εκθέτης
Νόμος δύναμης
Συσταδοποιημένες δομές
Fractal exponent
Power law
Clustering structures

description: Σκοπός της παρούσας μεταπτυχιακής διπλωματικής εργασίας είναι η μελέτη fractal σημειακών διαδικασιών με στόχο την ανίχνευση συσταδοποιημένων (ομαδοποιημένων), συσχετισμένων δομών. Πραγματοποιούμε μια εισαγωγή στα fractals, με έμφαση στην αυτοομοιότητα, στην κλιμάκωση και στη fractal διάσταση. Αναλύουμε τα στατιστικά μέτρα των fractal σημειακών διαδικασιών, όπως ιστόγραμμα μεταξύ διαδοχικών γεγονότων διαστημάτων, συντελεστής μεταβλητότητας, ρυθμός σύμπτωσης, Fano Factor, Allan Factor, εκθέτης Hurst. Επίσης, παρουσιάζουμε κάποιους από τους εκτιμητές των παραπάνω μέτρων. Εφαρμόζουμε στη Σεισμολογία επιλεγμένα στατιστικά μέτρα. Τα δεδομένα αφορούν τους σεισμούς μεγέθους μεγαλύτερου η ίσου του 4.1 που πραγματοποιήθηκαν στο Βόρειο Αιγαίο από το 1970 έως το 2011. Εκτός από την ακολουθία των πραγματικών δεδομένων χρησιμοποιείται η ακολουθία που προκύπτει από την κατανομή απότομης αποκοπής και από την κατανομή Poisson. Το τυχαίο δείγμα της κατανομής απότομης αποκοπής μπορεί να θεωρηθεί ως μια πραγματοποίηση μιας fractal σημειακής διαδικασίας, όπως είναι η ακολουθία των σεισμών, ενώ το τυχαίο δείγμα της Poisson χρησιμοποιείται για αντίθεση με τις δύο προηγούμενες ακολουθίες. Τέλος, υπολογίζουμε τις τιμές των εκθετών των προαναφερθέντων μέτρων και διατυπώνουμε τα συμπεράσματά μας.
description: The aim of the present Master thesis is the study of fractal stochastic point processes, the purpose of detecting clustering and correlated structures. We perform an introduction to fractals focusing on the properties of self-similarity, scaling and fractal dimension. We analyze the statistical measures of fractal point processes, such as interevent interval histogram, coefficient of variation, coincidence rate, Fano Factor, Allan Factor, Hurst exponent. Also, we present estimators of the aforementioned measures. Selected statistical measures are applied to Seismology. The data consists of earthquakes with magnitude equal or greater than 4.1, appearing in the Northern Aegean from 1970 to 2011. Apart from the sequence of actual data, we also use a sequence generated by abrupt cutoff and Poisson distributions. The random sample of abrupt cutoff can be considered as a realization of a fractal point process, such as the earthquake sequence, whereas a sample of the Poisson process is used for comparison purposes, against the previous two sequences. We calculate the values of the exponents of the previously mentioned measures and we state some conclusions.
High-speed observation of the piston effect near the gas-liquid critical point
Creators: name: Miura, Yuichi
name: Ohnishi, Mitsuru
name: Yoshihara, Shoichi
name: Honda, Katsuya
name: Matsumoto, Masahiro
name: Kawai, Jun
name: Ishikawa, Masamichi
name: Kobayashi, Hiroto
name: Onuki, Akira
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We measured high-speed sound propagation in a near-critical fluid using a ultra-sensitive interferometer to investigate adiabatic changes of fluids on acoustic timescales. A sound emitted by very weak continuous heating caused a stepwise adiabatic change at its front with a density change of order 10^{-7}g/cm^3 and a temperature change of order 10^{-5}deg. Very small heat inputs at a heater produced short acoustic pulses with width of order 10micro sec, which were broadened as they moved through the cell and encountered with the boundaries. The pulse broadening became enhanced near the critical point. We also examined theoretically how sounds are emitted from a heater and how applied heat is transformed into mechanical work. Our predictions well agree with our data.
description: 5 figures
A reduced model for shock and detonation waves. II. The reactive case
Creators: name: Maillet, Jean-Bernard
name: Soulard, Laurent
name: Stoltz, Gabriel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a mesoscopic model for reactive shock waves, which extends a previous model proposed in [G. Stoltz, Europhys. Lett. 76 (2006), 849]. A complex molecule (or a group of molecules) is replaced by a single mesoparticle, evolving according to some Dissipative Particle Dynamics. Chemical reactions can be handled in a mean way by considering an additional variable per particle describing a rate of reaction. The evolution of this rate is governed by the kinetics of a reversible exothermic reaction. Numerical results give profiles in qualitative agreement with all-atom studies.
Chirality Quantum Phase Transition in the Dirac oscillator
Creators: name: Bermudez, A.
name: Martin-Delgado, M. A.
name: Luis, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study a relativistic spin-1/2 fermion subjected to a Dirac oscillator coupling and a constant magnetic field. An interplay between opposed chirality interactions culminates in the appearance of a relativistic quantum phase transition, which can be fully characterized. We obtain analytical expressions for the energy gap, order parameter, and canonical quantum fluctuations across the critical point. Moreover, we also discuss the effect of this phase transition on the statistics of the chiral bosonic ensemble, where its super- or sub-Poissonian nature can be controled by means of external parameters. Finally, we study the entanglement properties between the degrees of freedom in the relativistic ground state, where an interesting transition between a bi-separable and a genuinely tripartite entangled state occurs.
description: RevTex4 file, color figures, submitted for publication
Personal problem-solving experiences: an exploratory study
Creators: name: Ayers, Stephen Michael
Publisher: name: University of British Columbia
Year: 2009

description: This study explored the nature of personal problem-solving experiences. These were defined as experiences which resolved personal problems in people's lives, and which occurred outside of a formal helping relationship. The data was collected with the help of five co-researchers, using a semi-structured interview method. A critical events analysis was employed to determine if a paradigmatic model of a problem-solving experience could be constructed. The variety of the experiences reported precluded constructing a model. However, a number of common elements emerged. Significant elements included (a) problem awareness, (b) distress about the problem, (c) spirituality, (d) openness, (e) prayer, (f) interdependence, (g) awareness of mortality, (h) symbolism, (i) coincidence or synchronicity, and (j) change in view of self and self-in-the-world. The theoretical and counselling implications of the significant elements were discussed. Support was found for the theoretical work of Carl Jung and George Kelly. Also supported was Willard Frick’s work on the Symbolic Growth Experience.
Condensates and anomaly cascade in vector-like theories
Creators: name: Anber, Mohamed M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the bilinear and higher-order fermion condensates in $4$-dimensional $SU(N)$ gauge theories with a single Dirac fermion in a general representation. Augmented with a mixed anomaly between the $0$-form discrete chiral, $1$-form center, and $0$-form baryon number symmetries (BC anomaly), we sort out theories that admit higher-order condensates and vanishing fermion bilinears. Then, the BC anomaly is utilized to prove, in the absence of a topological quantum field theory, that nonvanishing fermion bilinears are inevitable in infrared-gapped theories with $2$-index (anti)symmetric fermions. We also contrast the BC anomaly with the $0$-form anomalies and show that it is the former anomaly that determines the infrared physics; we argue that the BC anomaly lurks deep to the infrared while the $0$-form anomalies are just variations of local terms. We provide evidence of this assertion by studying the BC anomaly in vector-like theories compactified on a small spacial circle. These theories are weakly-coupled, under analytical control, and they admit a dual description in terms of abelian photons that determine the deep infrared dynamics. We show that the dual photons talk directly to the $1$-form center symmetry in order to match the BC anomaly, while the $0$-form anomalies are variations of local terms and are matched by fiat. Finally, we study the fate of the BC anomaly in the compactified theories when they are held at a finite temperature. The effective field theory that describes the low-energy physics is $2$-dimensional. We show that the BC anomaly cascades from $4$ to $2$ dimensions.
description: 29 pages, 2 figures
Η επίδραση του θεσμικού περιβάλλοντος στην αποδοτικότητα του εθνικού καινοτομικού συστήματος
Creators: name: Τσαουσίδου, Ευαγγελία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Καινοτομία
Θεσμοί
Κόστος συναλλαγών
Innovation
Institutions
Transaction costs

description: Η συμβολή της καινοτομίας στην οικονομική ανάπτυξη είναι αναμφισβήτητη, αλλά ένα θέμα που είναι υπό συζήτηση είναι ο ρόλος και η επιρροή των θεσμών στην καινοτομία. Το πρώτο βήμα είναι να μελετήσουμε το θεωρητικό πλαίσιο που αφορά την καινοτομία και τους θεσμούς ξεχωριστά. Μια ενδιαφέρουσα προσθήκη στην ανάλυση περιλαμβάνει την παρουσία του κόστους των συναλλαγών που θα λειτουργεί ως σύνδεσμος μεταξύ της θεσμικής δομής και της καινοτομικής επίδοσης. Αν θεωρήσουμε ως μονόδρομη σχέση την επιρροή των θεσμών, τότε μπορούν να συμβάλλουν στην κατανομή του κόστους συναλλαγών, που κατά συνέπεια, ενθαρρύνει ή καταστέλλει την πρωτοβουλία για καινοτομία. Εφορμώμενοι από αυτή τη σχέση την ερευνούμε και από εμπειρική πλευρά. Θα τεθεί υπό εξέταση μια μεγάλη ομάδα από θεσμικές παραμέτρους για να υπολογιστεί η δύναμη της επιρροής τους στην εθνική καινοτομική δραστηριότητα μέσω της εξέτασης των δεδομένων μιας ομάδας 81 χωρών για περίοδο 14 ετών από το 1995 έως το 2008. Τέλος, καταλήγουμε σε κάποια αξιόλογα αποτελέσματα για μη κοινότοπους παράγοντες εξακριβώνοντας την υπόθεσή μας για αλληλεπίδρασης μεταξύ της καινοτομίας και των θεσμών.
description: The contribution of innovation in economic growth is undisputable, but an issue that is under discussion is the role and influence of institutions to innovation. The first step is to study the theoretical framework that concerns innovation and institutions individually. An interesting addition to the analysis involves the presence of transaction costs that functions as a linkage between the institutional structure and the innovational performance. If we consider a one-way relationship the influence of the institutional form can reallocate the cost of the transactions, which consequently encourages or suppresses the national innovative initiative. Under this incentive we had to clarify it by its empirical side. We put under scrutiny a wide set of institutional parameters to figure out the power of their effect on national innovational activity via the examination of a panel data set of 81 countries for a 14-year period from 1995 to 2008. We came to an end with some remarkable results for not so common factors that verify our hypothesis of interaction between innovation and institutions.
ERICC Policy Brief _ Implementing the Myanmar Curriculum in Rohingya Camps: Overcoming Challenges and Barriers
Creators: name: ERICC Consortium
name: Saha, Proma
name: Haque, Ashraf
name: Hasan, Galib
name: Abedin, Mohosin
name: Dow, Jeffrey
name: Zaw, Htet Thiha
name: Diazgranados Ferráns, Silvia
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 390201
subject: Education policy

description: This policy brief draws from the findings of a comprehensive Education Research in Conflict and Protracted Crisis (ERICC) research study titled “Formative research on system coherence for quality and effective delivery of the Myanmar Curriculum in Cox’s Bazar” (forthcoming). The study was developed in response to existing gaps identified through a comprehensive evidence review1 and a country scan process that involved extensive consultations with stakeholders involved in the response to the Rohingya crisis in Cox’s Bazar2. The study aimed to identify factors affecting the implementation of the Myanmar Curriculum (MC) for Rohingya refugees in Cox’s Bazar, focusing on policy-level enablers and constraints, as well as local factors affecting education delivery.Implementation of the MC in Cox’s Bazar refugee camps marks a vital step towards delivering quality education to Rohingya refugee children. The review findings show that, while this initiative offers a structured curriculum that is culturally relevant, significant challenges remain, including a shortage of qualified teachers, language barriers and inadequate infrastructure. To ensure the sustainability of educational initiatives, it is imperative to address these challenges through comprehensive teacher training, mentorship programmes, language support and long-term and flexible funding.
Density waves theory of the capsid structure of small icosahedral viruses
Creators: name: Lorman, V. L.
name: Rochal, S. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We apply Landau theory of crystallization to explain and to classify the capsid structures of small viruses with spherical topology and icosahedral symmetry. We develop an explicit method which predicts the positions of centers of mass for the proteins constituting viral capsid shell. Corresponding density distribution function which generates the positions has universal form without any fitting parameter. The theory describes in a uniform way both the structures satisfying the well-known Caspar and Klug geometrical model for capsid construction and those violating it. The quasiequivalence of protein environments in viral capsid and peculiarities of the assembly thermodynamics are also discussed.
description: 8 pages, 3 figure
On weighted L^2 cohomology
Creators: name: Miller, John G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 58J22

description: Consider a complete orientable manifold with countably many components of bounded dimension. Suppose that its rational homology is infinitely generated in some degree. Then there is no choice of weight function for which the natural map from weighted L^2 cohomology to de Rham cohomology is surjective in that degree.
description: 7 pages. Published version. Improved introduction
Investigation of effects of dietary tryptophan supplementation on growth, physiology, immune response and disease resistance of juvenile channel catfish in stressed, unstressed and diseased conditions
Creators: name: Idowu, Abdullahi M
Publisher: name: Purdue University Graduate School
Year: 2024
Subjects: classificationCode: 310505
subject: Gene expression (incl. microarray and other genome-wide approaches)
classificationCode: 310507
subject: Genetic immunology
classificationCode: 310702
subject: Infectious agents
classificationCode: 310905
subject: Animal immunology
classificationCode: 310904
subject: Animal diet and nutrition
classificationCode: 310909
subject: Animal physiology - cell
classificationCode: 310910
subject: Animal physiology - systems
classificationCode: 310914
subject: Vertebrate biology

description: The aquaculture industry has experienced remarkable expansion over the past few decades, largely due to the development of modern technologies and intensive farming systems. However, as the industry continues to grow, farming-related and environmental stressors such as overcrowding, poor water conditions and handling have continued to pose major obstacles to the worldwide expansion of this sector. The presence of these stressors affect the growth potential and health of farmed animals leading to significant economic losses. Hence, efficient management of the stress response of farmed species via sustainable means is important to ensure continuous development of the aquaculture sector. This study, therefore, explores the potential of dietary tryptophan supplementation to mitigate stress and improve growth, immune response, and disease resistance in channel catfish (Ictalurus punctatus). The study comprised a 36-day feeding trial where juvenile catfish were fed a tryptophan-supplemented diet under stressed (cortisol-supplemented) and unstressed conditions, followed by a 72-hour disease challenge with Aeromonas hydrophila (vAh). At the end of the study, the results show tryptophan supplementation did not significantly enhance growth or nutrient utilization, likely due to its neuroendocrine effects on feed intake. However, tryptophan demonstrated potential in modulating stress physiology and immune responses, including upregulation of key immune-related genes post-infection and promoting survival against vAh infection. These findings suggest that while tryptophan may not directly improve growth in our specific experimental conditions, its role in stress and immune regulation warrants further investigation, particularly in optimizing its dosage and combination with other dietary additives.
Hyperfine Interactions in USb2 Crystal
Creators: name: Fathi, A.
name: Asadabadi, S. Jalali
name: Rad, M. G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The hyperfine interactions at the uranium site in the antiferromagnetic USb2 compound were calculated within the density functional theory (DFT) employing the augmented plane wave plus local orbital (APW+lo) method. We investigated the dependence of the nuclear quadruple interactions to the magnetic structure in USb2 compound. The investigation were performed applying the so called band correlated LDA+U theory self consistently. The self consistent LDA+U calculations were gradually added to the performed generalized gradient approximation (GGA) including scalar relativistic spin orbit interactions in a second variation scheme. The result, which is in agreement with experiment, shows that the 5f-electrons have the tendency to be hybridized with the conduction electrons in the ferromagnetic uranium planes.
description: Available online at: http://journals.iut.ac.ir/ijpr/fullv6n2y2006p123-136.pdf
Η διανομή οπτικοακουστικών έργων: η αρχή της χρονικά διαδοχικής εκμετάλλευσης και το μέλλον της στην εποχή των δικτύων
Creators: name: Βαλσαμάρας, Δημήτριος Δρόσου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: subject: Κινηματογράφος
subject: Διανομή
subject: Νομοθεσία
subject: Cinema
subject: Distribution
subject: Law
subject: FOS: Law

description: Σκοπός της διατριβής ήταν η μελέτη της νομοθεσίας που αφορά την διανομή οπτικοακουστικού υλικού. Εξέτασα την ορολογία που χρησιμοποιείται για τις παγιωμένες εκφράσεις και τους ορισμούς που έχουν προταθεί. Έπειτα, παρουσίασα μια περιληπτική χρονική αναδρομή της ιστορίας του κινηματογράφου παγκοσμίως για να καταλήξω να αναλύσω τις αιτίες που δημιούργησαν την κρίση του. Στη συνέχεια παρουσίασα αναλυτικά την ισχύουσα νομοθεσία για την διανομή των οπτικοακουστικών έργων στην Ευρώπη και κυρίως για την Γαλλία, αλλά και την Αμερική και στην αναλογική αλλά και στην ψηφιακή εποχή. Με ιστορική αναδρομή, πραγματοποίησα αναλυτική αναφορά της νομοθεσίας ξεχωριστά για κάθε νέο μέσο τεχνολογίας όπως DVD, BlueRay, Video on Demand, Pay per View αναλύοντας παράλληλα και τα τεχνικά χαρακτιριστικά τους. Ως τρόπο αντιμετώπισης της κρίσης του κινηματογράφου, παρουσίασα τις άδειες πνευματικών δικαιωμάτων creative commons. Η παρούσα πτυχιακή εργασία εκπονήθηκε στα πλαίσια του Μεταπτυχιακού Προγράμματος Σπουδών του Τμήματος Δημοσιογραφίας και ΜΜΕ του Αριστοτέλειου Πανεπιστημίου Θεσσαλονίκης κατά την περίοδο Ιούνιος 2010 - Ιούνιος 2012. Για την ολοκλήρωση της απαιτήθηκε ενδελεχής έρευνα κυρίως στο διαδίκτυο, σε πηγές επί το πλείστον Γαλλικής προέλευσης, αλλά και Αμερικάνικης και Ελληνικής.
description: The purpose of this study was to examine the law concerning the distribution of audiovisual material. Ι examined the terminology used and the definitions that have been proposed. Then, I presented a chronological review of the history of worldwide cinema to end with an analysis of the causes that created its crisis. Then, I presented in detail the current legislation on the distribution of audiovisual works in Europe and particularly France, and America, during the analog and digital era. In a historical order, I made a detailed reference for the laws of distribution in each new media technology such as DVD, BlueRay, Video on Demand, Pay per View and analyzed their technical details. As a way of addressing the crisis of cinema, I presented the copyright licenses of creative commons. The present study was carried out through the Graduate Program of the Department of Journalism and Mass Media, of Aristotle University of Thessaloniki during the period June 2010 - June 2012. To complete the required research, mostly internet sources were used in French, but also in English and Greek.
Anomalous doping evolution of superconductivity and quasiparticle interference in Bi2Sr2Ca2Cu3O10+δ trilayer cuprates
Creators: name: Hao, Zhenqi
name: Zou, Changwei
name: Luo, Xiangyu
name: Ji, Yu
name: Xu, Miao
name: Ye, Shusen
name: Zhou, Xingjiang
name: Lin, Chengtian
name: Wang, Yayu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use scanning tunneling microscopy to investigate Bi2Sr2Ca2Cu3O10+δ trilayer cuprates from the optimally doped to overdoped regime. We find that the two distinct superconducting gaps from the inner and outer CuO2 planes both decrease rapidly with doping, in sharp contrast to the nearly constant Tc. Spectroscopic imaging reveals the absence of quasiparticle interference in the antinodal region of overdoped samples, showing an opposite trend to that in single- and double-layer compounds. We propose that the existence of two types of inequivalent CuO2 planes and the intricate interaction between them are responsible for these highly anomalous observations in trilayer cuprates.
description: 13 pages, 4 figures
Celestial positions in radio and optical
Creators: name: Frey, S.
name: Veres, P.
name: Vida, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the importance of the direct link between the most accurate radio and optical reference frames that will become possible with the next-generation space astrometry missions in about a decade. The positions of more than 500 active galactic nuclei that are common in the precise Very Long Baseline Interferometry (VLBI) catalogues and the Sloan Digital Sky Survey (SDSS) Data Release 4 (DR4) are compared. While obtaining an ``independent'' estimate for the SDSS coordinate accuracies, we find indications that the assumption of spatially coincident brightness peaks for the same objects in radio and optical does not hold for each object.
description: 6 pages, 1 figure; to appear in the Publ. Astron. Dept. of the Eotvos Univ., Budapest, Hungary (PADEU Vol. 17, 2006, ed. E. Forgacs-Dajka et al.)
Detergents and Chaotropes for Protein Solubilization before Two-Dimensional Electrophoresis
Creators: name: Rabilloud, Thierry
name: Luche, Sylvie
name: Santoni, Véronique
name: Chevallet, Mireille
Publisher: name: arXiv
Year: 2006
Subjects: subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: Because of the outstanding separating capabilities of two-dimensional electrophoresis for complete proteins, it would be advantageous to be able to apply it to all types of proteins. Unfortunately, severe solubility problems hamper the analysis of many classes of proteins, but especially membrane proteins. These problems arise mainly in the extraction and isoelectric focusing steps, and solutions are sought to improve protein solubility under the conditions prevailing during isoelectric focusing. These solutions deal mainly with chaotropes and new detergents, which are both able to enhance protein solubility. The input of these compounds in proteomics analysis of membrane proteins is discussed, as well as future directions.
description: link to publisher's site http://biomed.humanapress.com/
One-shot Text Field Labeling using Attention and Belief Propagation for Structure Information Extraction
Creators: name: Cheng, Mengli
name: Qiu, Minghui
name: Shi, Xing
name: Huang, Jun
name: Lin, Wei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Structured information extraction from document images usually consists of three steps: text detection, text recognition, and text field labeling. While text detection and text recognition have been heavily studied and improved a lot in literature, text field labeling is less explored and still faces many challenges. Existing learning based methods for text labeling task usually require a large amount of labeled examples to train a specific model for each type of document. However, collecting large amounts of document images and labeling them is difficult and sometimes impossible due to privacy issues. Deploying separate models for each type of document also consumes a lot of resources. Facing these challenges, we explore one-shot learning for the text field labeling task. Existing one-shot learning methods for the task are mostly rule-based and have difficulty in labeling fields in crowded regions with few landmarks and fields consisting of multiple separate text regions. To alleviate these problems, we proposed a novel deep end-to-end trainable approach for one-shot text field labeling, which makes use of attention mechanism to transfer the layout information between document images. We further applied conditional random field on the transferred layout information for the refinement of field labeling. We collected and annotated a real-world one-shot field labeling dataset with a large variety of document types and conducted extensive experiments to examine the effectiveness of the proposed model. To stimulate research in this direction, the collected dataset and the one-shot model will be released1.
description: 9 pages
NGC7538 IRS1 -- an O star driving an ionized jet and giant N-S outflow
Creators: name: Sandell, G.
name: Wright, M.
name: Güsten, R.
name: Wiesemeyer, H.
name: Reyes, N.
name: Mookerjea, B.
name: Corder, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: NGC 7538 IRS 1 is a very young embedded O star driving an ionized jet and accreting mass with an accretion rate > 10^-4 Msun/year, which is quenching the hypercompact HII region. We use SOFIA GREAT data, Herschel PACS and SPIRE archive data, SOFIA FORCAST archive data, Onsala 20m and CARMA data, and JCMT archive data to determine the properties of the O star and its outflow. IRS 1 appears to be a single O-star with a bolometric luminosity > 1 10^5 Lsun, i.e. spectral type O7 or earlier. We find that IRS 1 drives a large molecular outflow with the blue-shifted northern outflow lobe extending to ~ 280" or 3.6 pc from IRS 1. Near IRS 1 the outflow is well aligned with the ionized jet. The dynamical time scale of the outflow is ~ 1.3 10^5 yr. The total outflow mass is ~ 130 Msun. We determine a mass outflow rate of 1.0 10^-3 Msun/yr, roughly consistent with the observed mass accretion rate. We observe strong high velocity [CII] emission in the outflow, confirming that strong UV radiation from IRS 1 escapes into the outflow lobes and is ionizing the gas. Many O stars may form like low mass stars, but with a higher accretion rate and in a denser environment. As long as the accretion stays high enough to quench the HII region, the star will continue to grow. When the accretion rate drops, the HII region will rapidly start to expand.
description: 21 pages, 19 figures. Accepted for publication in The Astrophysical Journal
Discovery of a cluster of galaxies behind the Milky Way: X-ray and optical observations
Creators: name: de Oliveira, R. Lopes
name: Neto, G. B. Lima
name: de Oliveira, C. Mendes
name: Janot-Pacheco, E.
name: Motch, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of Cl 2334+48, a rich cluster of galaxies in the Zone of Avoidance, identified in public images from the XMM-Newton archive. We present the main properties of this cluster using the XMM-Newton X-ray data, along with new optical spectroscopic and photometric observations. Cl 2334+48 is located at z = 0.271 +/- 0.001, as derived from the optical spectrum of the brightest member galaxy. Such redshift agrees with a determination from the X-ray spectrum (z = 0.263 (+0.012/-0.010)), in which an intense emission line is matched to the rest wavelength of the Fe Kalpha complex. Its intracluster medium has a plasma temperature of 4.92 (+0.50/-0.48) keV, sub-solar abundance (0.38 +/- 0.12 Zsun), and a bolometric luminosity of 3.2 x 10^44 erg/s. A density contrast delta = 2500 is obtained in a radius of 0.5 Mpc/h70, and the corresponding enclosed mass is 1.5 x 10^14 Msun. Optical images show an enhancement of g'-i' > 2.5 galaxies around the central galaxy, as expected if these were cluster members. The central object is a luminous E-type galaxy, which is displaced ~ 40 kpc/h70 from the cluster X-ray center. In addition, it has a neighbouring arc-like feature (~ 22" or 90 kpc/h70 from it), probably due to strong gravitational lensing. The discovery of Cl 2334+48 emphasises the remarkable capability of the XMM-Newton to reveal new clusters of galaxies in the Zone of Avoidance.
description: 9 pages, 11 figures, Accepted for publication in A&A (on July 12, 2006)
First phase space portrait of a hierarchical stellar structure in the Milky Way
Creators: name: Dalessandro, E.
name: Varri, A. L.
name: Tiongco, M.
name: Vesperini, E.
name: Fanelli, C.
name: Mucciarelli, A.
name: Origlia, L.
name: Bellazzini, M.
name: Saracino, S.
name: Oliva, E.
name: Sanna, N.
name: Fabrizio, M.
name: Livernois, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the first detailed observational picture of a possible ongoing massive cluster hierarchical assembly in the Galactic disk as revealed by the analysis of the stellar full phase-space (3D positions and kinematics and spectro-photometric properties) of an extended area ($6^{\circ}$ diameter) surrounding the well-known $\it h$ and $χ$ Persei double stellar cluster in the Perseus Arm. Gaia-EDR3 shows that the area is populated by seven co-moving clusters, three of which were previously unknown, and by an extended and quite massive ($M\sim10^5 M_{\odot}$) halo. All stars and clusters define a complex structure with evidence of possible mutual interactions in the form of intra-cluster over-densities and/or bridges. They share the same chemical abundances (half-solar metallicity) and age ($t\sim20$ Myr) within a small confidence interval and the stellar density distribution of the surrounding diffuse stellar halo resembles that of a cluster-like stellar system. The combination of these evidences suggests that stars distributed within a few degrees from $\it h$ and $χ$ Persei are part of a common, sub-structured stellar complex that we named LISCA I. Comparison with results obtained through direct $N$-body simulations suggest that LISCA I may be at an intermediate stage of an ongoing cluster assembly that can eventually evolve in a relatively massive (a few $10^5 M_{\odot}$) stellar system. We argue that such cluster formation mechanism may be quite efficient in the Milky Way and disk-like galaxies and, as a consequence, it has a relevant impact on our understanding of cluster formation efficiency as a function of the environment and redshift.
description: 19 pages, 8 figures, 1 table; accepted for publication in ApJ
ALEPH Tau Spectral Functions and QCD
Creators: name: Davier, Michel
name: Hoecker, Andreas
name: Zhang, Zhiqing
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Hadronic $τ$ decays provide a clean laboratory for the precise study of quantum chromodynamics (QCD). Observables based on the spectral functions of hadronic $τ$ decays can be related to QCD quark-level calculations to determine fundamental quantities like the strong coupling constant, quark and gluon condensates. Using the ALEPH spectral functions and branching ratios, complemented by some other available measurements, and a revisited analysis of the theoretical framework, the value $\asm = 0.345 \pm 0.004_{\rm exp} \pm 0.009_{\rm th}$ is obtained. Taken together with the determination of \asZ from the global electroweak fit, this result leads to the most accurate test of asymptotic freedom: the value of the logarithmic slope of $α_s^{-1}(s)$ is found to agree with QCD at a precision of 4%. The value of \asZ obtained from $τ$ decays is $\asZ = 0.1215 \pm 0.0004_{\rm exp} \pm 0.0010_{\rm th} \pm 0.0005_{\rm evol} = 0.1215 \pm 0.0012$.
description: 14 pages, 5 figures, invited talk at the Tau06 International Workshop, Pisa, September 19-22 2006
Adult offspring of alcoholic parents: development and investigation of the psychometric properties of the behavior role scale
Creators: name: Schneider, John Donald
Publisher: name: University of British Columbia
Year: 2009

description: The primary objective of this study was the development and investigation of the psychometric properties of a measurement instrument based on the integrated model of behavior roles of offspring of alcoholic parents (Schneider, 1989,1995). The Behavior Role Scale was developed utilizing Crocker and Algina's (1986) 10 step instrument development process and deals directly with the concepts of the original models of behavior roles of offspring of alcoholic parents (Black, 1981; Booz-Allen & Hamilton, 1974; Deutsch, 1983; Kritzberg, 1985; Wegscheider, 1981). The first three steps of the instrument development were completed in an earlier investigation (Schneider, 1989). In this investigation, steps 4 - 8 were completed. The following activities were undertaken: step 4, the construction of an initial pool of items; step 5, the review and revision of the items with the assistance of a panel of experts; step 6, a preliminary tryout of the items in a pilot test; step 7, a field test of the instrument with a nonclinical sample of offspring of alcoholic parents and offspring of nonalcoholic parents; and, step 8, initial investigation of the psychometric properties of the behavior role scale. This investigation contributed the following findings. The field test yielded reliability estimates of .72 for the Caretaker, .67 for the Super Achiever, .86 for the Invisible One, .89 for the Jester, .78 for the Rebel, and an overall alpha of .88. Initial validity was indicated by the emergence of a five factor model as the most interpretable factor analysis solution. The performance of the Behavior Role Scale was also investigated using six validity issues identified in the literature. Offspring of alcoholic parents, offspring of nonalcoholic parents who had experienced a significant family disruption, and offspring of nonalcoholic parents who had not experienced a significant family disruption had significantly different scores with the Super Achiever, Invisible One, and Rebel roles. The three groups did not demonstrate significant differences with the Caretaker or Jester roles. Additional significant differences were discovered with the Jester and Rebel roles among offspring of alcoholic fathers when they were compared according to their fathers' pattern of drinking. The findings of this investigation add to the research evidence which suggests that refinements need to be made to improve the clinical and psycho-educational uses of the behavior roles of offspring of alcoholic parents. Recommendations for future research include submitting the Behavior Role Scale to construct validation studies in order to further refine its ability to measure behavior roles and to be of assistance to researchers seeking to unravel the complexities of life for more than 28 million offspring of alcoholic parents.
gut microbiome of CRC
Creators: name: 郭健
Publisher: name: CNGB
Year: 2024
Subjects: Genome sequencing and assembly
Metabolome
Multiisolate

description: In this study, we investigated the composition and functions of microbes and metabolites in individuals with healthy and colorectal cancer. We observed significant differences in the overall composition and function of gut microbiota and intestinal metabolites in individuals with colorectal cancer. Through metabolomics and correlation analysis using 16S ribosomal RNA gene sequencing, we discovered a notable decrease in tyrosol concentrations in CRC patients.
Two stripped envelope supernovae with circumstellar interaction -- but only one really shows it
Creators: name: Sollerman, J.
name: Fransson, C.
name: Barbarino, C.
name: Fremling, C.
name: Horesh, A.
name: Kool, E.
name: Schulze, S.
name: Sfaradi, I.
name: Yang, S.
name: Bellm, E. C.
name: Burruss, R.
name: Cunningham, V.
name: De, K.
name: Drake, A. J.
name: Golkhou, V. Z.
name: Green, D. A.
name: Kasliwal, M.
name: Kulkarni, S.
name: Kupfer, T.
name: Laher, R. R.
name: Masci, F. J.
name: Rodriguez, H.
name: Rusholme, B.
name: Williams, D. R. A.
name: Yan, L.
name: Zolkower, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present SN 2019tsf (ZTF19ackjszs) and SN 2019oys (ZTF19abucwzt). These two stripped envelope Type Ib supernovae suddenly showed a (re-)brightening in their late light curves. We investigate this in the context of circumstellar material (CSM) interaction with previously ejected material, a phenomenon that is unusual among SE SNe. We analyse observational data, consisting of optical light curves and spectra. For SN 2019oys we also have detections in radio as well as limits from UV and X-rays. Both light curves show spectacular re-brightening after about 100 days. In the case of SN 2019tsf, the re-brightening is followed by a new period of decline, and the spectra never show signs of narrow emission lines that would indicate CSM interaction. On the contrary, SN 2019oys made a spectral makeover from a Type Ib to a spectrum clearly dominated by CSM interaction at the light curve brightening phase. Deep spectra reveal a plethora of narrow high ionization lines, including coronal lines, and the radio observations show strong emission. The rather similar light curve behaviour indicate CSM interaction as the powering source. For SN 2019oys the evidence for a phase where the ejecta hit H-rich material, likely ejected from the progenitor star, is conspicuous. We observe strong narrow lines of H and He, but also a plethora of high ionization lines, including coronal lines, revealing shock interaction. Spectral simulations of SN 2019oys show two distinct density components, one with density > 1e9/cm3, dominated by somewhat broader, low ionization lines of H I, He I, Na I and Ca II, and one with narrow, high ionization lines at a density about 1e6 /cm3. The former is strongly affected by electron scattering. The evidence for CSM interaction in SN 2019oys is corroborated by detections in radio. On the contrary, for SN 2019tsf, we find little evidence in the spectra for any CSM interaction.
description: Resubmitted to A&A after first referee report
What is the Inverse of Repeated Square and Multiply Algorithm?
Creators: name: Gadiyar, H. Gopalkrishna
name: Maini, K M Sangeeta
name: Padma, R.
name: Romsy, Mario
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: Cryptography and Security (cs.CR)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 11Y16

description: It is well known that the repeated square and multiply algorithm is an efficient way of modular exponentiation. The obvious question to ask is if this algorithm has an inverse which would calculate the discrete logarithm efficiently. The technical hitch is in fixing the right sign of the square root and this is the heart of the discrete logarithm problem over finite fields of characteristic not equal to 2. In this paper a couple of probabilistic algorithms to compute the discrete logarithm over finite fields are given by bypassing this difficulty. One of the algorithms was inspired by the famous 3x+1 problem.
description: 15 pages
Spin dynamics in the regime of hopping conductivity
Creators: name: Lyubinskiy, I. S.
name: Dmitriev, A. P.
name: Kachorovskii, V. Yu.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider spin dynamics in the impurity band of a semiconductor with spin-split spectrum. Due to the splitting, phonon-assisted hops from one impurity to another are accompanied by rotation of the electron spin, which leads to spin relaxation. The system is strongly inhomogeneous because of exponential variation of hopping times. However, at very small couplings an electron diffuses over a distance exceeding the characteristic scale of the inhomogeneity during the time of spin relaxation, so one can introduce an averaged spin relaxation rate. At larger values of coupling the system is effectively divided into two subsystems: the one where relaxation is very fast and another one where relaxation is rather slow. In this case, spin decays due to escape of the electrons from one subsystem to another. As a result, the spin dynamics is non-exponential and hardly depends on spin-orbit coupling.