cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Εικονικές Κοινότητες και υποστήριξη εικονικών ομάδων με τη χρήση ομότιμων δικτύων (P2P). Η περίπτωση των Ξενοδοχειακών Μονάδων:
Creators: name: Κορδέλας, Γεώργιος Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Ομότιμο δίκτυο
Εικονικές κοινότητες
Πρωτόκολα JXTA
Peer network
Virtual communities
IXTA protocols

description: Στην διπλωματική αυτή σχεδιάστηκε, και αναπτύχθηκε μια εφαρμογή ομότιμου δικτύου. Το πεδίο αξιοποίησης της εντοπίζεται στην τουριστική αγορά καθώς τα μέλη που συμμετέχουν στο δίκτυο εκπροσωπούν είτε καταναλωτές είτε ξενοδοχειακές μονάδες. Το σύνολο των μελών που συμμετέχουν στο ομότιμο δίκτυο μπορεί να θεωρηθεί ότι συγκροτούν μία εικονική κοινότητα. Περιληπτικά, η εφαρμογή συμπεριλαμβάνει την ανακάλυψη των έτερων μελών του δικτύου, την δημιουργία σύνδεσης μεταξύ τους και έπειτα την διανομή και την ενημέρωση για τους διαθέσιμους πόρους των μελών. Ταυτόχρονα οι καταναλωτές έχουν την δυνατότητα να αναζητήσουν διαθέσιμα ξενοδοχεία από τους τουριστικούς εταίρους και οι εταίροι ανάλογα με την διαθεσιμότητα των πόρων και τις ανάγκες του καταναλωτή να τον εξυπηρετήσουν. Για να υλοποιηθούν οι προαναφερθείσες λειτουργίες αξιοποιείται η τεχνολογία JXTA, που αναπτύχθηκε από τη Sun Microsystems. Η τεχνολογία αυτή επιτρέπει στις συσκευές να συνδεθούν χωρίς να κρίνεται αναγκαία η γνώση της δικτυακής αρχιτεκτονικής τους.
description: In this diploma thesis was designed, and developed a peer network application. The field of exploitation lies in the tourist market while the members that participate in the network represent consumers or hotels. The members that participate in the peer network are considered to constitute a virtual community. Summarizing, the application includes the discovery of other network members, the establishment of connection between each other and then the distribution of the available members’ resources. Additionally, the consumers have the option to search for available hotel rooms from the tourist partners and then the partners depending on the availability of resources and the needs of consumer to serve them. The JXTA technology (developed by Sun Microsystems) is exploited in order to utilize the services mentioned before. This technology allows electronic devices to be connected in the peer network without prior knowledge of the network architecture.
Counter-intuitive results in acousto-elasticity
Creators: name: Gower, Artur L.
name: Destrade, Michel
name: Ogden, Ray W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present examples of body wave and surface wave propagation in deformed solids where the slowest and the fastest waves do not travel along the directions of least and greatest stretch, respectively. These results run counter to commonly accepted theory, practice, and implementation of the principles of acousto-elasticity in initially isotropic solids. For instance we find that in nickel and steel, the fastest waves are along the direction of greatest compression, not greatest extension (and vice-versa for the slowest waves), as soon as those solids are deformed. Further, we find that when some materials are subject to a small-but-finite deformations, other extrema of wave speeds appear in non-principal directions. Examples include nickel, steel, polystyrene, and a certain hydrogel. The existence of these ``oblique'', non-principal extremal waves complicates the protocols for the non-destructive determination of the directions of extreme strains.
High threshold universal quantum computation on the surface code
Creators: name: Fowler, Austin G.
name: Stephens, Ashley M.
name: Groszkowski, Peter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a comprehensive and self-contained simplified review of the quantum computing scheme of Phys. Rev. Lett. 98, 190504 (2007), which features a 2-D nearest neighbor coupled lattice of qubits, a threshold error rate approaching 1%, natural asymmetric and adjustable strength error correction and low overhead arbitrarily long-range logical gates. These features make it by far the best and most practical quantum computing scheme devised to date. We restrict the discussion to direct manipulation of the surface code using the stabilizer formalism, both of which we also briefly review, to make the scheme accessible to a broad audience.
description: 18 pages, 28 figures, state distillation section corrected
Η εκπαίδευση των κρατουμένων. Το παράδειγμα του σχολείου δεύτερης ευκαιρίας Διαβατών Θεσσαλονίκης.:
Creators: name: Παπαθανασίου, Νικόλαος Θεόδωρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Εκπαίδευση
Κρατούμενοι
Φυλακή
Education
Prisoners
Prison

description: Η πρόσβαση στην εκπαίδευση αποτελεί βασικό δικαίωμα το οποίο παραμένει ισχυρό και κατά τη διάρκεια έκτισης στερητικών της ελευθερίας ποινών. Η εκπαίδευση των κρατουμένων έχει πολλαπλά οφέλη τόσο κατά τη διάρκεια της έκτισης της ποινής όσο και μετά την αποφυλάκιση. Η δυνατότητα ταχύτερης αποφυλάκισης, η πρόσβαση στη γνώση, το γέμισμα του χρόνου μέσα στη φυλακή, η απόκτηση τίτλων σπουδών αποτελούν μερικά από αυτά. Βιώνεται από τους εκπαιδευόμενους ως μια όαση ελευθερίας στην έρημο του εγκλεισμού και δίνει δυνατότητα για ομαλή επανένταξη των κρατουμένων μετά την αποφυλάκιση. Η παρούσα εργασία έχει ως στόχο να αναλύσει τη σημασία και το ρόλο της εκπαίδευσης των κρατουμένων, να εξετάσει το ισχύον νομικό πλαίσιο και να ψηλαφίσει τις δομές εκπαίδευσης που λειτουργούν στις ελληνικές φυλακές. Με την εμπειρική έρευνα που διεξήχθη ανάμεσα στους εκπαιδευτικούς και τους μαθητές του Σχολείου Δεύτερης Ευκαιρίας που λειτουργεί στο Γενικό Κατάστημα Κράτησης Θεσσαλονίκης επιχειρείται να αποκρυσταλλωθούν οι τάσεις των κρατουμένων που παρακολουθούν το σχολείο σε σχέση με την παρεχόμενη εκπαίδευση, τους λόγους της επιλογής τους να συνεχίσουν το σχολείο στη φυλακή, τις προσδοκίες τους, αλλά και τις δυσκολίες που αντιμετωπίζουν. Παρόλο που υπάρχουν ακόμη πράγματα που πρέπει να βελτιωθούν, βασικό συμπέρασμα της έρευνας είναι ότι το παράδειγμα του Σχολείου Δεύτερης Ευκαιρίας Διαβατών Θεσσαλονίκης φέρνει πολλά θετικά αποτελέσματα. Για το λόγο αυτό θα έπρεπε να γενικευτεί σε όλες τις φυλακές.
description: The access to education represents a fundamental right which is in force also during serving a sentence. Prison education has multiple benefits not only during serving a sentence, but also after release. The possibility of earlier release, the access to knowledge, the filling up of the time during imprisonment and the acquisition of qualifications are some of them. Students experience it as an oasis of freedom in the desert of confinement and it helps facilitate a normal reintegration of the prisoners after being released. This study aims at analysing the importance and the role of prison education, highlighting the legal framework currently in force and studying the educational structures in greek prisons. Through empirical research carried out among students and tutors of the Second Chance School which is placed at the General Department of Detention in Thessaloniki, it is attempted to unveil the tendencies of the prisoners attending school regarding the offered education, the reasons of choosing to go on with prison education, the expectations of the prisoners, but also the difficulties they are facing. Even though there are still improvements to be made, one may conclude by the study that the example of the Second Chance School in Diavata, Thessaloniki, entails various advantages. For that reason, it should be applied in all prisons.
An updated view of the oligosaccharyltransferase complex in Plasmodium and other protists
Creators: name: Tamana, Stella
name: Promponas, Vasilis
Publisher: name: F1000 Research Limited
Year: 2019

description: Asparagine-linked glycosylation is among the fundamental processes conserved throughout all domains of life and the oligosaccharyltransferase (OST) complex is a key enzyme in this process. The eukaryotic OST complex consists of 8 core subunits, integral to the endoplasmic reticulum (ER) membrane, with homologs identified across all eukaryotic phyla. Even though several genomes of malaria parasites have been sequenced and intensively annotated, the currently established notion is that only 4 subunits of the OST complex are present in Plasmodium. In this study, we provide unequivocal evidence that all components of the OST complex (with the exception of Swp1/Ribophorin II) are encoded in well-conserved syntenic regions across Plasmodium species with sequenced genomes in PlasmoDB. In addition, we provide preliminary evidence that several OST subunits reported to be absent from other protists can be potentially identified.
Tessellation and Lyubich-Minsky laminations associated with quadratic maps II: Topological structures of 3-laminations
Creators: name: Kawahira, Tomoki
Publisher: name: arXiv
Year: 2006
Subjects: subject: Dynamical Systems (math.DS)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 37F45

description: According to an analogy to quasi-Fuchsian groups, we investigate topological and combinatorial structures of Lyubich and Minsky's affine and hyperbolic 3-laminations associated with the hyperbolic and parabolic quadratic maps. We begin by showing that hyperbolic rational maps in the same hyperbolic component have quasi-isometrically the same 3-laminations. This gives a good reason to regard the main cardioid of the Mandelbrot set as an analogue of the Bers slices in the quasi-Fuchsian space. Then we describe the topological and combinatorial changes of laminations associated with hyperbolic-to-parabolic degenerations (and parabolic-to-hyperbolic bifurcations) of quadratic maps. For example, the differences between the structures of the quotient 3-laminations of Douady's rabbit, the Cauliflower, and $z \mapsto z^2$ are described. The descriptions employ a new method of tessellation inside the filled Julia set introduced in Part I that works like external rays outside the Julia set.
description: 68 pages, 29 figures
Dynamical structure of highly eccentric discs with applications to tidal disruption events
Creators: name: Lynch, Elliot M.
name: Ogilvie, Gordon I.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Whether tidal disruption events circularise or accrete directly as highly eccentric discs is the subject of current research and appears to depend sensitively on the disc thermodynamics. One aspect of this problem that has not received much attention is that a highly eccentric disc must have a strong, non-hydrostatic variation of the disc scale height around each orbit. As a complement to numerical simulations carried out by other groups, we investigate the dynamical structure of TDE discs using the nonlinear theory of eccentric accretion discs. In particular, we study the variation of physical quantities around each elliptical orbit, taking into account the dynamical vertical structure, as well as viscous dissipation and radiative cooling. The solutions include a structure similar to the nozzle-like structure seen in simulations. We find evidence for the existence of the thermal instability in highly eccentric discs dominated by radiation pressure. For thermally stable solutions many of our models indicate a failure of the $α-$prescription for turbulent stresses. We discuss the consequences of our results for the structure of eccentric TDE discs.
description: 19 pages, 20 figures, accepted in MNRAS
Deficiencies in numerical models of anisotropic nonlinearly elastic materials
Creators: name: Annaidh, Aisling Ni
name: Destrade, Michel
name: Gilchrist, Michael D.
name: Murphy, Jerry G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Incompressible nonlinearly hyperelastic materials are rarely simulated in Finite Element numerical experiments as being perfectly incompressible because of the numerical difficulties associated with globally satisfying this constraint. Most commercial Finite Element packages therefore assume that the material is slightly compressible. It is then further assumed that the corresponding strain-energy function can be decomposed additively into volumetric and deviatoric parts. We show that this decomposition is not physically realistic, especially for anisotropic materials, which are of particular interest for simulating the mechanical response of biological soft tissue. The most striking illustration of the shortcoming is that with this decomposition, an anisotropic cube under hydrostatic tension deforms into another cube instead of a hexahedron with non-parallel faces. Furthermore, commercial numerical codes require the specification of a `compressibility parameter' (or `penalty factor'), which arises naturally from the flawed additive decomposition of the strain-energy function. This parameter is often linked to a `bulk modulus', although this notion makes no sense for anisotropic solids; we show that it is essentially an arbitrary parameter and that infinitesimal changes to it result in significant changes in the predicted stress response. This is illustrated with numerical simulations for biaxial tension experiments of arteries, where the magnitude of the stress response is found to change by several orders of magnitude when infinitesimal changes in `Poisson's ratio' close to the perfect incompressibility limit of 1/2 are made.
Ultrafast electro-nuclear dynamics of H2 double ionization
Creators: name: Saugout, Sebastien
name: Cornaggia, Christian
name: Suzor-Weiner, Annick
name: Charron, Eric
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The ultrafast electronic and nuclear dynamics of H2 laser-induced double ionization is studied using a time-dependent wave packet approach that goes beyond the fixed nuclei approximation. The double ionization pathways are analyzed by following the evolution of the total wave function during and after the pulse. The rescattering of the first ionized electron produces a coherent superposition of excited molecular states which presents a pronounced transient H+H- character. This attosecond excitation is followed by field-induced double ionization and by the formation of short-lived autoionizing states which decay via double ionization. These two double ionization mechanisms may be identified by their signature imprinted in the kinetic-energy distribution of the ejected protons.
PROBLEMS WITH THE USE OF INNOVATION PROJECTS IN THE HOTEL BUSINESS
Creators: name: Kunnazarova Orazxan Karakalpak State University faculty of Economics 1st year Master student
Publisher: name: Zenodo
Year: 2024

description: This article analyzes the issues of effective use of innovative ideas in modern hotel business, and the article is based on international experience.

Keywords: innovation, tourism, hotel, business, advanced technology, startup
Victory Square : a case study in municipal planning for inner-city revitalization
Creators: name: Vaisbord, Peter Alexander
Publisher: name: University of British Columbia
Year: 2009

description: This case study provides an analysis and evaluation of a contemporary inner-city revitalization initiative, the subject case being the Victory Square planning process and subsequent draft Concept Plan released in June, 1995. The subject case is analyzed in terms of the impact of inner city "revitalization" initiatives on the low-income residents who live within districts targeted for revitalization, the fundamental question being: "Who benefits (or suffers) from revitalization efforts?" Evaluation of the subject case begins with the normative proposition that direct benefits from revitalization should accrue to the existing residents of affected low-income communities. The central research question involves identification of the key elements or characteristics of planning process and policy necessary to achieve the normatively defined outcome. These elements are employed as criteria against which the subject case is analyzed and evaluated. The thesis reviews the evolution of urban renewal/revitalization strategies in the post-war period, and parallel shifts in inner-city demographics as Vancouver continues its transition to a post-industrial economy. Gentrification trends, land use policies, and the senior government retreat from housing, are discussed in terms of their negative consequences for low-income inner-city residents.
LDA+DMFT computation of the electronic spectrum of NiO
Creators: name: Ren, X.
name: Leonov, I.
name: Keller, G.
name: Kollar, M.
name: Nekrasov, I.
name: Vollhardt, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The electronic spectrum, energy gap and local magnetic moment of paramagnetic NiO are computed by using the local density approximation plus dynamical mean-field theory (LDA+DMFT). To this end the noninteracting Hamiltonian obtained within the local density approximation (LDA) is expressed in Wannier functions basis, with only the five anti-bonding bands with mainly Ni 3d character taken into account. Complementing it by local Coulomb interactions one arrives at a material-specific many-body Hamiltonian which is solved by DMFT together with quantum Monte-Carlo (QMC) simulations. The large insulating gap in NiO is found to be a result of the strong electronic correlations in the paramagnetic state. In the vicinity of the gap region, the shape of the electronic spectrum calculated in this way is in good agreement with the experimental x-ray-photoemission and bremsstrahlung-isochromat-spectroscopy results of Sawatzky and Allen. The value of the local magnetic moment computed in the paramagnetic phase (PM) agrees well with that measured in the antiferromagnetic (AFM) phase. Our results for the electronic spectrum and the local magnetic moment in the PM phase are in accordance with the experimental finding that AFM long-range order has no significant influence on the electronic structure of NiO.
description: 15 pages, 6 figures, 1 table; published version
Short-time dynamics of polypeptides
Creators: name: Arashiro, Everaldo
name: de Felício, J. R. Drugowich
name: Hansmann, Ulrich H. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Quantitative Biology (q-bio.OT)
subject: FOS: Biological sciences

description: The authors study the short-time dynamics of helix-forming polypeptide chains using an all-atom representation of the molecules and an implicit solvation model to approximate the interaction with the surrounding solvent. The results confirm earlier observations that the helix-coil transition in proteins can be described by a set of critical exponents. The high statistics of the simulations allows the authors to determine the exponents values with increased precision and support universality of the helix-coil transition in homopolymers and (helical) proteins.
description: 11 pages, 7 figures
Οικονομική σύγκλιση μεταξύ ευρωπαϊκών περιφερειών:
Creators: name: Χατζηγιάννης, Εμμανουήλ Φερδινάνδου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Β-σύγκλιση
Περιφερειακή οικονομική
Ευρωπαϊκές περιφέρειες
B-convergence
Regional economics
European regions

description: Υπάρχει ένα ευρύ φάσμα εμπειρικών εργασιών στην οικονομική μεγέθυνση και την πορεία οικονομικής σύγκλισης που παρουσιάζουν οι χώρες της Ε.Ε. Ωστόσο, παρόμοιες εργασίες σε Ευρωπαϊκό περιφερειακό επίπεδο είναι περιορισμένες κυρίως στα γεωγραφικά πλαίσια συγκεκριμένων χωρών ή μικρών ομάδων κρατών τα οποία παρουσιάζουν κοινά χαρακτηριστικά. Στην παρούσα εργασία εξετάζεται το φαινόμενο της β-σύγκλισης μεταξύ των περιφερειών της Ε.Ε.27 (271 NUTS II) για το χρονικό διάστημα 1995-2007. Από την ανάλυση τόσο του συνολικού δείγματος όσο και των υπό-περιόδων δεν προκύπτει απόλυτη σύγκλιση μεταξύ των περιφερειών της Ε.Ε.27 για την περίοδο 1995-2007. Βρίσκουμε ότι έχουν διαμορφωθεί διαφορετικές πορείες σύγκλισης μεταξύ τόσο της Ε.Ε.15 και των Νέων Μελών όσο και μεταξύ των μελών της Νομισματικής Ένωσης και των μη Μελών. Οι χώρες του Ευρωπαϊκού Νότου (PIGS) συγκλίνουν μεταξύ τους και δημιουργούν μια ξεχωριστή λέσχη σε σχέση με τις υπόλοιπες περιφέρειες της Ε.Ε.15. Αναφορικά με τις Μητροπολιτικές περιφέρειες της Ε.Ε.15 βρίσκουμε την ύπαρξη σύγκλισης μεταξύ των μη Μητροπολιτικών περιφερειών της ενώ βρίσκουμε την ύπαρξη σύγκλισης του κατά κεφαλήν ΑΕΠ στις Μητροπολιτικές περιφέρειες των Νέων Μελών της Ε.Ε.
description: There is a wide range of empirical work on economic growth and its convergence path between EU countries. However, similar work on European regional level is usually limited at the geographic boundaries of specific countries or small groups of countries that are geographically related. In this paper we examine the existence of β-convergence between regions of E.U.27 (271 NUTS II) during the period 1995-2007. In the analysis of both the total sample as well as the sub-periods absolute convergence does not exist between regions of E.U.27. We find different convergence paths between E.U.15 and the New members as well as between the members of the Economic and Monetary Union and the non-members. PIGS converge to each other forming a separate club in relation to the other members of the E.U. 15. Metropolitan regions of the New members experience significant convergence at the sub-periods as well as non-metropolitan regions in the E.U.15 present significant convergence rate.
SketchPatch: Sketch Stylization via Seamless Patch-level Synthesis
Creators: name: Fish, Noa
name: Perry, Lilach
name: Bermano, Amit
name: Cohen-Or, Daniel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Graphics (cs.GR)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: I.3.3

description: The paradigm of image-to-image translation is leveraged for the benefit of sketch stylization via transfer of geometric textural details. Lacking the necessary volumes of data for standard training of translation systems, we advocate for operation at the patch level, where a handful of stylized sketches provide ample mining potential for patches featuring basic geometric primitives. Operating at the patch level necessitates special consideration of full sketch translation, as individual translation of patches with no regard to neighbors is likely to produce visible seams and artifacts at patch borders. Aligned pairs of styled and plain primitives are combined to form input hybrids containing styled elements around the border and plain elements within, and given as input to a seamless translation (ST) generator, whose output patches are expected to reconstruct the fully styled patch. An adversarial addition promotes generalization and robustness to diverse geometries at inference time, forming a simple and effective system for arbitrary sketch stylization, as demonstrated upon a variety of styles and sketches.
description: SIGGRAPH Asia 2020
Measurement of double beta decay of 100Mo to excited states in the NEMO 3 experiment
Creators: name: Arnold, R.
name: Augier, C.
name: Baker, J.
name: Barabash, A. S.
name: Bongrand, M.
name: Broudin, G.
name: Brudanin, V.
name: Caffrey, A. J.
name: Egorov, V.
name: Etienvre, A. I.
name: Fatemi-Ghomi, N.
name: Hubert, F.
name: Hubert, Ph.
name: Jerie, J.
name: Jollet, C.
name: Jullian, S.
name: King, S.
name: Kochetov, O.
name: Konovalov, S. I.
name: Kovalenko, V.
name: Lalanne, D.
name: Lamhamdi, T.
name: Leccia, F.
name: Lemi`ere, Y.
name: Longuemare, C.
name: Lutter, G.
name: Marquet, Ch.
name: Mauger, F.
name: Nachab, A.
name: Ohsumi, H.
name: Perrot, F.
name: Piquemal, F.
name: Reyss, J. L.
name: Ricol, J. S.
name: Saakyan, R.
name: Sarazin, X.
name: Simard, L.
name: Simkovic, F.
name: Shitov, Yu.
name: Smolnikov, A.
name: S"oldner-Rembold, S.
name: Stekl, I.
name: Suhonen, J.
name: Sutton, C. S.
name: Szklarz, G.
name: Thomas, J.
name: Timkin, V.
name: Tretyak, V.
name: Umatov, V.
name: V'ala, L.
name: Vanyushin, I.
name: Vasiliev, V.
name: Vorobel, V.
name: Vylov, Ts.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The double beta decay of 100Mo to the 0^+_1 and 2^+_1 excited states of 100Ru is studied using the NEMO 3 data. After the analysis of 8024 h of data the half-life for the two-neutrino double beta decay of 100Mo to the excited 0^+_1 state is measured to be T^(2nu)_1/2 = [5.7^{+1.3}_{-0.9}(stat)+/-0.8(syst)]x 10^20 y. The signal-to-background ratio is equal to 3. Information about energy and angular distributions of emitted electrons is also obtained. No evidence for neutrinoless double beta decay to the excited 0^+_1 state has been found. The corresponding half-life limit is T^(0nu)_1/2(0^+ --> 0^+_1) > 8.9 x 10^22 y (at 90% C.L.). The search for the double beta decay to the 2^+_1 excited state has allowed the determination of limits on the half-life for the two neutrino mode T^(2nu)_1/2(0^+ --> 2^+_1) > 1.1 x 10^21 y (at 90% C.L.) and for the neutrinoless mode T^(0nu)_1/2(0^+ --> 2^+_1) > 1.6 x 10^23 y (at 90% C.L.).
description: 23 pages, 7 figures, 4 tables, submitted to Nucl. Phys
Modified GR and Helium Nucleosynthesis
Creators: name: Al-Rawaf, A. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that a previously proposed cosmological model based on general relativity with non vanishing divergence for the energy-momentum tensor is consistent with the observed values for the nucleosynthesis of helium for some values of the arbitrary parameter $α$ presented in this model. Further more values of $α$ can be accommodated if we adopt the Randall-Sundrum single brane model.
description: 5 pages
Ερευνα ανάπτυξης των έργων επίτευξης του υδρολογικού σκοπού στις λεκάνες απορροής των χειμάρρων του ΝΑ Πάικου:
Creators: name: Τατσίδου, Χρυσούλα Τάκη
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Ορος Πάικο
Λεκάνη απορροής
Paiko mountain
Drainage basin

description: Αντικείμενο της παρούσας μεταπτυχιακής διατριβής αποτελεί η διερεύνηση της βέλτιστης εφαρμογής της υδρολογικής αρχής στους χειμάρρους–ρέματα της περιοχής του Α-ΝΑ όρους Πάικου, γνωστή και ως Παιονία (στο νομό Κιλκίς). Για το λόγο αυτό πραγματοποιήθηκε ανάλυση μορφομετρικών και υδρογραφικών παραμέτρων των υδρολογικών λεκανών των επτά κύριων ρεμάτων της περιοχής, με τη χρήση Γεωγραφικών Συστημάτων Πληροφοριών (ΓΣΠ). Επιπλέον μελετήθηκαν οι τέσσερις βασικοί παράγοντες χειμαρρικότητας (κλίμα, βλάστηση, ανάγλυφο, γεωλογικό υπόθεμα), υπολογίστηκαν οι μέγιστες υδατοστερεοπαροχές, και ερευνήθηκε το υδατικό δυναμικό των επτά λεκανών απορροής. Ολοκληρώνοντας προτείνεται η εφαρμογή των έργων της υδρολογικής αρχής, κατά λεκάνη, με σκοπό τη δημιουργία ενός υποβάθρου ανάπτυξης έργων, τα οποία θα αντιμετωπίζουν τα υδατικά προβλήματα και θα εξυπηρετούν τις υφιστάμενες υδατικές ανάγκες της περιοχής.
description: The present master thesis deals with the study of the optimum application of hydrologic principle in the torrents–streams of the E-SE Paiko mountain, a region known also as Peonia (located at the prefecture of Kilkis). For this reason, a morphometric and hydrographic feature analysis of the drainage basins, of the region’s seven main streams, was carried out with use of Geographic Information Systems (GIS). Moreover, the four basic torrential factors (climate, vegetation, relief, geological substrate) were determined, the highest expected water flow and the highest expected sediment discharge were calculated and a water balance research for the seven basins was gathered. Finally, for each basin, a proposal of works, which promote the hydrologic principal, was made, in order to create a basis of development, which will deal the water problems and will serve the existing water needs of the region.
Morphogenesis through elastic phase separation in a pneumatic surface
Creators: name: Siéfert, Emmanuel
name: Roman, Benoît
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We report a phenomenon of phase separation that relates in many aspects to Yves Couder's work: an inflatable architectured elastomer plate, expected to expand homogeneously in its plane, buckles instead widely out-of-plane into very complex shape when internal pressure is applied. We show that this morphogenetic pattern formation is due to a two-dimensional elastic phase separation, which induces incompatible patchy non-Euclidean reference metric.
Extracting Semantic Concepts and Relations from Scientific Publications by Using Deep Learning
Creators: name: AL-Aswadi, Fatima N.
name: Chan, Huah Yong
name: Gan, Keng Hoon
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: With the large volume of unstructured data that increases constantly on the web, the motivation of representing the knowledge in this data in the machine-understandable form is increased. Ontology is one of the major cornerstones of representing the information in a more meaningful way on the semantic Web. The current ontology repositories are quite limited either for their scope or for currentness. In addition, the current ontology extraction systems have many shortcomings and drawbacks, such as using a small dataset, depending on a large amount predefined patterns to extract semantic relations, and extracting a very few types of relations. The aim of this paper is to introduce a proposal of automatically extracting semantic concepts and relations from scientific publications. This paper suggests new types of semantic relations and points out of using deep learning (DL) models for semantic relation extraction.
description: Proposal
Phosphorus Pentamers: Floating Nanoflowers form a 2D Network
Creators: name: Zhang, Wei
name: Enriquez, Hanna
name: Tong, Yongfeng
name: Mayne, Andrew J.
name: Bendounan, Azzedine
name: Dappe, Yannick J.
name: Kara, Abdelkader
name: Dujardin, Gérald
name: Oughaddou, Hamid
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present an experimental investigation of a new polymorphic 2D single layer of phosphorus on Ag(111). The atomically-resolved scanning tunneling microscopy (STM) images show a new 2D material composed of freely-floating phosphorus pentamers organized into a 2D layer, where the pentamers are aligned in close-packed rows. The scanning tunneling spectroscopy (STS) measurements reveal a semiconducting character with a band gap of 1.20 eV. This work presents the formation at low temperature (LT) of a new polymorphic 2D phosphorus layer composed of a floating 2D pentamer structure. The smooth curved terrace edges and a lack of any clear crystallographic orientation with respect to the Ag(111) substrate at room temperature indicates a smooth potential energy surface that is reminiscent of a liquid-like growth phase. This is confirmed by density functional theory (DFT) calculations that find a small energy barrier of only 0.17 eV to surface diffusion of the pentamers (see Supplemental Material). The formation of extended, homogeneous domains is a key ingredient to opening a new avenue to integrate this new 2D material into electronic devices.
L’enseignement de la danse contemporaine comme éducation à l’empathie
Creators: name: Benedetti, Davia
Publisher: name: Antropologia e Teatro. Rivista di Studi
Year: 2019
Subjects: danza contemporanea; empatia; educazione; soggettività incorporata; Grounded Theory

description: Ce texte étudie l’empathie à partir de la pièce chorégraphique Entre chien et loup (2008) créée par Rodolphe Foulliot pour la Compagnie du Jeune Ballet Corse. Il montre comment la danse contemporaine met des danseurs animés d’une même intentionnalité de production, en situation d’interactions sensorimotrices et d’expression de leur ipséité. Leur relationnel dansé relève d’un processus empathique où s’exerce une réciprocité d’écoute kinesthésique et sensorielle fondée sur un savoir capter la subjectivité des partenaires.
description: Antropologia e Teatro. Rivista di Studi, No 10 (2019)
Failure avalanches in fiber bundles for discrete load increase
Creators: name: Hemmer, Per C.
name: Pradhan, Srutarshi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The statistics of burst avalanche sizes $n$ during failure processes in a fiber bundle follows a power law, $D(n)\sim n^{-ξ}$, for large avalanches. The exponent $ξ$ depends upon how the avalanches are provoked. While it is known that when the load on the bundle is increased in a continuous manner, the exponent takes the value $ξ=5/2$, we show that when the external load is increased in discrete and not too small steps, the exponent value $ξ=3$ is relevant. Our analytic treatment applies to bundles with a general probability distribution of the breakdown thresholds for the individual fibers. The pre-asymptotic size distribution of avalanches is also considered.
description: 4 pages 2 figures
Current distribution in a slit connecting two graphene half-planes
Creators: name: Pershoguba, Sergey S.
name: Young, Andrea F.
name: Glazman, Leonid I.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the joint effect of viscous and Ohmic dissipation on electric current flow through a slit in a barrier dividing a graphene sheet in two. In the case of the no-slip boundary condition, we find that the competition between the viscous and Ohmic types of the charge flow results in the evolution of the current density profile from a concave to convex shape. We provide a detailed analysis of the evolution and identify favorable conditions to observe it in experiment. In contrast, in the case of the no-stress boundary condition, there is no qualitative difference between the current profiles in the Ohmic and viscous limits. The dichotomy between the behavior corresponding to distinct boundary conditions could be tested experimentally.
description: v1. 11 pages, 3 figures. Corresponds to published version
THE ANALYSIS OF COGNITIVE PSYCHOLOGY IN LINGUISTICS IN HIGHER EDUCATION AMONG LEARNERS OF ENGLISH
Creators: name: Раимова Камола Бахрамовна,  старший преподаватель ТИУ
Publisher: name: Zenodo
Year: 2024

description: This article analyzes the role of cognitive psychology in linguistics, specifically among learners of English in higher education. The study focuses on the cognitive mechanisms involved in language acquisition, including working memory, attention, and long-term memory, and how these processes affect linguistic proficiency in academic contexts. The article also explores the challenges ESL learners face, such as cognitive overload and language anxiety, and emphasizes the importance of metacognitive strategies for self-regulation and improved language learning. The integration of cognitive psychology insights into language education can enhance learning outcomes and facilitate more effective teaching methods for English learners.

Keywords:  Cognitive psychology, linguistics, working memory, attention, language acquisition, ESL learners, higher education, metacognition, language proficiency, cognitive overload, language anxiety
Target space duality and moduli stabilization in String Gas Cosmology
Creators: name: Chatrabhuti, Auttakit
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Motivated by string gas cosmology, we investigate the stability of moduli fields coming from compactifications of string gas on torus with background flux. It was previously claimed that moduli are stabilized only at a single fixed point in moduli space, a self-dual point of T-duality with vanishing flux. Here, we show that there exist other stable fixed points on moduli space with non-vanishing flux. We also discuss the more general target space dualities associated with these fixed points.
description: 12 pages, 1 figure
A Novel Approach to Radiometric Identification
Creators: name: Nigmatullin, Raoul
name: Dorokhin, Semyon
name: Ivchenko, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: Multimedia (cs.MM)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This paper demonstrates that highly accurate radiometric identification is possible using CAPoNeF feature engineering method. We tested basic ML classification algorithms on experimental data gathered by SDR. The statistical and correlational properties of suggested features were analyzed first with the help of Point Biserial and Pearson Correlation Coefficients and then using P-values. The most relevant features were highlighted. Random Forest provided 99% accuracy. We give LIME description of model behavior. It turns out that even if the dimension of the feature space is reduced to 3, it is still possible to classify devices with 99% accuracy.
description: 7 pages, 3 figures, 2 tables
The origin of mass,spin and interaction
Creators: name: Sidharth, Burra G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: We argue that a non commutative geometry at the Compton scale is at the root of mass, Quantum Mechanical spin and QCD and electromagnetic interactions. It also leads to a reconciliation of linearized General Relativity and Quantum Theory.
description: 11 pages, tex Talk at the Eight International Symposium on the Frontiers of Fundamental Physics, Madrid, October, 2006
Protein Structure Prediction: The Next Generation
Creators: name: Prentiss, Michael C.
name: Hardin, Corey
name: Eastwood, Michael P.
name: Zong, Chenghong
name: Wolynes, Peter G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: Over the last 10-15 years a general understanding of the chemical reaction of protein folding has emerged from statistical mechanics. The lessons learned from protein folding kinetics based on energy landscape ideas have benefited protein structure prediction, in particular the development of coarse grained models. We survey results from blind structure prediction. We explore how second generation prediction energy functions can be developed by introducing information from an ensemble of previously simulated structures. This procedure relies on the assumption of a funnelled energy landscape keeping with the principle of minimal frustration. First generation simulated structures provide an improved input for associative memory energy functions in comparison to the experimental protein structures chosen on the basis of sequence alignment.
Identification of Methyl Isocyanate and Other Complex Organic Molecules in a Hot Molecular Core, G31.41+0.31
Creators: name: Gorai, Prasanta
name: Das, Ankan
name: Shimonishi, Takashi
name: Sahu, Dipen
name: Mondal, Suman Kumar
name: Bhat, Bratati
name: Chakrabarti, Sandip K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: G31.41+0.31 is a well known chemically rich hot molecular core (HMC). Using Band 3 observations of Atacama Large Millimeter Array (ALMA), we have analyzed the chemical and physical properties of the source. We have identified methyl isocyanate (CH3NCO), a precursor of prebiotic molecules, towards the source. In addition to this, we have reported complex organic molecules (COMs) like methanol (CH3OH), methanethiol (CH3SH), and methyl formate (CH3OCHO). Additionally, we have used transitions from molecules like HCN, HCO+, SiO to trace the presence of infall and outflow signatures around the star-forming region. For the COMs, we have estimated the column densities and kinetic temperatures, assuming molecular excitation under local thermodynamic equilibrium (LTE) conditions. From the estimated kinetic temperatures of certain COMs, we found that multiple temperature components may be present in the HMC environment. Comparing the obtained molecular column densities between the existing observational results toward other HMCs, it seems that the COMs are favourably produced in the hot-core environment ($\sim 100$ K or higher). Though the spectral emissions towards G31.41+0.31 are not fully resolved, we find that CH$_3$NCO and other COMs are possibly formed on the grain/ice phase and populate the gas environment similar to other hot cores like Sgr B2, Orion KL, and G10.47+0.03, etc.
description: 28 pages, 21 figures, 6 tables. Accepted for publication in the Astrophysical Journal
A Ruelle Operator for continuous time Markov Chains
Creators: name: Baraviera, Alexandre
name: Exel, Ruy
name: Lopes, Artur O.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 37A05

description: We consider a generalization of the Ruelle theorem for the case of continuous time problems. We present a result which we believe is important for future use in problems in Mathematical Physics related to $C^*$-Algebras We consider a finite state set $S$ and a stationary continuous time Markov Chain $X_t$, $t\geq 0$, taking values on S. We denote by $Ω$ the set of paths $w$ taking values on S (the elements $w$ are locally constant with left and right limits and are also right continuous on $t$). We consider an infinitesimal generator $L$ and a stationary vector $p_0$. We denote by $P$ the associated probability on ($Ω, {\cal B}$). This is the a priori probability. All functions $f$ we consider bellow are in the set ${\cal L}^\infty (P)$. From the probability $P$ we define a Ruelle operator ${\cal L}^t, t\geq 0$, acting on functions $f:Ω\to \mathbb{R}$ of ${\cal L}^\infty (P)$. Given $V:Ω\to \mathbb{R}$, such that is constant in sets of the form $\{X_0=c\}$, we define a modified Ruelle operator $\tilde{\cal L}_V^t, t\geq 0$. We are able to show the existence of an eigenfunction $u$ and an eigen-probability $ν_V$ on $Ω$ associated to $\tilde{\cal L}^t_V, t\geq 0$. We also show the following property for the probability $ν_V$: for any integrable $g\in {\cal L}^\infty (P)$ and any real and positive $t$ $$ \int e^{-\int_0^t (V \circ Θ_s)(.) ds} [ (\tilde{\cal L}^t_V (g)) \circ θ_t ] d ν_V = \int g d ν_V$$ This equation generalize, for the continuous time Markov Chain, a similar one for discrete time systems (and which is quite important for understanding the KMS states of certain $C^*$-algebras).
Εφαρμογή τεχνικών εξόρυξης δεδομένων για την πρόβλεψη της κατανάλωσης σε ηλεκτρικά δίκτυα χαμηλής τάσης
Creators: name: Κομνηνού, Μυρσίνη Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Εξόρυξη δεδομένων
Καταναλωτές χαμηλής τάσης
Πρόβλεψη κατανάλωσης
Data mining
Low-voltage customers
Load forecasting

description: Στην παρούσα διπλωματική εργασία γίνεται μια προσπάθεια πρόβλεψης του φορτίου των καταναλωτών χαμηλής τάσης και συγκεκριμένα των νοικοκυριών, που ως απώτερο στόχο έχει, εν όψει της εφαρμογής της απελευθέρωσης αγοράς ηλεκτρικής ενέργειας και στο πεδίο της χαμηλής τάσης της Ελλάδος – δώδεκα ολόκληρα χρόνια μετά την θεσμική απελευθέρωσή της- να προσφέρει στους προμηθευτές ηλεκτρικής ενέργειας χρήσιμες πληροφορίες για τους εν δυνάμει πελάτες τους. Για το σκοπό αυτό γίνεται αρχικά επιλογή, από μια πληθώρα διαθέσιμων μεταβλητών που αφορούν στις ηλεκτρικές συνήθειες των νοικοκυριών αλλά και δεδομένα τύπου συμβολαίου, εκείνων των μεταβλητών που σχετίζονται περισσότερο με την έξοδο. Έπειτα, εφαρμόζεται σε αυτές μέσω διαφόρων αλγορίθμων η τεχνική της εξόρυξης γνώσης από δεδομένα, Data Mining, για την εξαγωγή του βέλτιστου δυνατού μοντέλου πρόβλεψης φορτίου. Τα αποτελέσματα που πήραμε ήταν αρκετά ικανοποιητικά. Καταλήξαμε στο συμπέρασμα ότι η επιλογή field indices σε συνδυασμό με a priori indices και η χρήση meta και ensemble σχημάτων δίνουν τα καλύτερα αποτελέσματα- correlation coefficient της τάξης του 0,79. Τα δεδομένα που χρησιμοποιήθηκαν προέρχονται από μια βάση δεδομένων των νοικοκυριών των Η.Π.Α., καθώς αντίστοιχη βάση με ελληνικά δεδομένα δεν είναι διαθέσιμη.
description: This thesis concerns an attempt for load forecasting of low-voltage electricity customers, and particularly of residential housing units. The ultimate goal, considering the deregulation of the electricity market in Greece – twelve years after its institutional deregulation- is to provide valuable information for electricity suppliers about their potential customers. For this purpose, attribute selection is performed firstly and then data mining techniques are applied, in order to extract a model that better predicts energy conumption. The data used are real and come from the Residential Energy Consumption Survey (RECS) of U.S. These are data concerning the use of energy in residential housing units including physical housing unit types, appliances utilized, demographics, fuels, and other energy use information. The results obtained were quite satisfactory. We concluded that the selection of both a priori and field indices, and the use of meta and ensemble techniques give the best results – correlation coefficient 0,79.
description: Σε συνεργασία με το τμήμα Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
THEME: GOTHIC CLASSICS IN THE WORKS AND POETRY OF EDGAR ALLAN POE
Creators: name: Hasanova, Gavharhon
Publisher: name: Zenodo
Year: 2024

description: There is a strong chance that you will have heard the name, Edgar Allan Poe, however, not everyone has read his work or understands his lasting impact, so if you’re new to Poe or classic horror, allow me to help you explore the shadows of the genre and get to know its icons. Just like any good story, let’s start at the very beginning, with the birth of Gothic Literature. Gothic Literature is the strange and awkward love child of the Romantic movement, born in the late 18th century. The genre has captivated readers in the centuries since its conception with its moody, darkly mysterious, and often chilling tales. In its black heart, this literary tradition harbors a deep fascination with the macabre.