cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ανάπτυξη και υλοποίηση αλγόριθμων για τον υπολογισμό ολογραμμάτων σημειακών πηγών
Creators: name: Ντουάνογλου, Ελευθέριος Κ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Παράθλαση
Ολογράμματα σημειακών πηγών
Computer generated holograms
Point source holograms

description: Η διατριβή έχει ως αντικείμενο την ανάπτυξη αλγορίθμων για τον υπολογισμό ψηφιακών ολογραμμάτων σημειακών πηγών. Ενα από τα ζητούμενα στην περιοχή αυτή είναι η διατύπωση αλγορίθμων που θα καταφέρνουν να μειώσουν τον απαιτούμενο χρόνο υπολογισμού ενός ολογράμματος δίχως να αυξάνουν απαγορευτικά την απαιτούμενη βάση δεδομένων. Στα πλαίσια αυτής της εργασίας προτάθηκαν, αναπτύχθηκαν και δοκιμάστηκαν τρείς νέοι αλγόριθμοι, οι οποίοι αντιμετωπίζουν την ανταγωνιστική σχέση που υπάρχει μεταξύ αυτών των δυο απαιτήσεων, δίχως τη χρήση ειδικού υλικού. Η διατριβή περιλαμβάνει και τη θεωρητική ανάλυση ενός ολογράμματος σημειακής πηγής με σκοπό να ξεκαθαρίσει η επίδραση κρίσιμων παραμέτρων και τη διατύπωση μιας μεθοδολογίας αξιολόγησης των αλγρίθμων ως προς την ταχύτητα και την ποιότητα του ειδώλου που ανακατασκευάζεται από ολόγραμμα που υπολογίστηκε με τους προτεινόμενους αλγόριθμους
description: The subject of this doctoral thesis is the development of algorithms for computer generated holograms(CGH) based on the point source concept. First the hologram of a point source is developed for the analogue and the digital form. Three new algorithms are introduced where we neither need to calculate analytically each elementary hologram to store all the predeterminal elementary holograms in a look-up table. New methods for the evaluation of algorithms in computational speed and quality performance is also introduced
High speed and reconfigurable optronic neural network with digital nonlinear activation
Creators: name: Wu, Qiuhao
name: Liu, Jia
name: Sui, Xiubao
name: Wang, Liping
name: Chen, Qian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Emerging Technologies (cs.ET)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: With its unique parallel processing capability, optical neural network has shown low-power consumption in image recognition and speech processing. At present, the manufacturing technology of programmable photonic chip is not mature, and the realization of optical neural network in free-space is still a hot spot of intelligent optical computing. In this article, based on MNIST datasets and 4f system, three-layer optical neural networks are constructed, whose recognition accuracy can reach 93.66%. Our network is programmable, high speed, reconfigurable and is better than the existing free-space optical neural network in terms of spatial complexity.
Εξόρυξη δεδομένων για την δυναμική ενσωμάτωσης γνώσης σε πολυπρακτορικά συστήματα συστήματα
Creators: name: Συμεωνίδης, Ανδρέας Λ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Εξόρυξη δεδομένων
Πολυπρακτορικά συστήματα
Γνωσιακό μοντέλο
Εκπαίδευση πρακτόρων
Συμπεριφορά πρακτόρων
Κοινωνία πρακτόρων
Data mining
Multi-agent systems
Knowledge model
Agent training
Agent behaviour
Agent community

description: Στα πλαίσια της διατριβής αυτής παρουσιάζεται μια ενοποιημένη μεθοδολογία, η οποία επιτρέπει την εφαρμογή δυναμικών, σύνθετων και ανανεώσιμων κανόνων σε πολυπρακτορικά συστήματα. Οι κανόνες αυτοί εξάγονται με τη χρήση τεχνικών Εξόρυξης Δεδομένων(ΕΔ). Η μεθοδολογία αυτή αναγνωρίζει τρεις τύπους γνώσης, η οποία προέρχεται από την εφαρμογή τεχνικών ΕΔ, και ανάλογα διαφοροποιεί το μοντέλο διάχυσής της. Οι τρεις αυτοί τύποι γνώσης είναι : α)γνώση η οποία εξάγεται με τη χρήση τεχνικών ΕΔ σε ιστορικά δεδομένα μιας εφαρμογής β)γνώση η οποία εξάγεται με τη χρήση τεχνικών ΕΔ στα ιστορικά δεδομένα των συμπεριφορών των πρακτόρων μιας εφαρμογής και γ)γνώση η οποία εξάγεται με τη χρήση εξελικτικών τεχνικών τεχνικών ΕΔ σε πολυπρακτορικές κοινωνίες. Μελετώνται οι κυρίαρχες τεχνικές ΕΔ σε ένα ικανό αριθμό αντιπροσωπευτικών εφαρμογών και παρατίθενται τα συμπεράσματα
description: Within the context of this thesis a unified methodology for building agents and multi-agent systems is presented. Agents and agent systems developed following the proposed methodology have the ability of dynamically incorporating knowledge, extracted by the use of data mining (DM) techniques on application and agent data. Three types of knowledge are identified : a)knowledge extracted by the use of DM techniques on historical application data b)knowledge extracted by the use of DM techniques on agent behaviour data and c) knowledge extracted by the use of evolutionary DM techniques on multi-agent communities. The four dominant DM techniques are studied in order to investigate their applicability potential on an indicative number of multi-agent domains and the conclusions drawn summarized
Dynamical stability of the modified Tolman VII solution
Creators: name: Posada, Camilo
name: Hladík, Jan
name: Stuchlík, Zdeněk
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Studies of neutron stars are at their peak after the multi-messenger observation of the binary merger event GW170817, which strongly constraints the stellar parameters like tidal deformability, masses and radii. Although current and future observations will provide stronger limits on the neutron stars parameters, knowledge of explicit interior solutions to Einstein's equations, which connect observed parameters with the internal structure, are crucial to have a satisfactory description of the interior of these compact objects. A well known exact solution, which has shown a relatively good approximation to a neutron star, is the Tolman VII solution. In order to provide a better fitting for the energy density profile, with the realistic equations of state for neutron stars, recently Jiang and Yagi proposed a modified version of this model which introduces an additional parameter $α$ reflecting the interplay of the quadratic and the newly added quartic term in the energy density profile. Here we study the dynamical stability of this modified Tolman VII solution using the theory of infinitesimal and adiabatic radial oscillations developed by Chandrasekhar. For this purpose, we determine values of the critical adiabatic index, for the onset of instability, considering configurations with varying compactness and $α$. We found that the new models are stable against radial oscillations for a considerable range of values of compactness and the new parameter $α$, thus supporting their applicability as a physically plausible approximation of realistic neutron stars.
description: 10 pages, 7 figures. Updated Figs. 2 and 7. Few minor changes in presentation. Corrected some statements on the realistic EOSs in Sec. IV. Extended conclusions and discussion. Accepted for publication in PRD
Farming awareness based optimum interventions for crop pest control
Creators: name: Abraha, Teklebirhan
name: Basir, Fahad Al
name: Obsu, Legesse Lemecha
name: Torres, Delfim F. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Mathematics
subject: FOS: Biological sciences

description: We develop a mathematical model, based on a system of ordinary differential equations, to the upshot of farming alertness in crop pest administration, bearing in mind plant biomass, pest, and level of control. Main qualitative analysis of the proposed mathematical model, akin to both pest-free and coexistence equilibrium points and stability analysis, is investigated. We show that all solutions of the model are positive and bounded with initial conditions in a certain significant set. The local stability of pest-free and coexistence equilibria is shown using the Routh-Hurwitz criterion. Moreover, we prove that when a threshold value is less than one, then the pest-free equilibrium is locally asymptotically stable. To get optimum interventions for crop pests, that is, to decrease the number of pests in the crop field, we apply optimal control theory and find the corresponding optimal controls. We establish existence of optimal controls and characterize them using Pontryagin's minimum principle. Finally, we make use of numerical simulations to illustrate the theoretical analysis of the proposed model, with and without control measures.
description: This is a preprint of a paper whose final and definite form is published Open Access in 'Mathematical Biosciences and Engineering', available in [https://doi.org/10.3934/mbe.2021272]. Please cite this article as: T. Abraha, F. Al Basir, L. L. Obsu and D. F. M. Torres, Farming awareness based optimum interventions for crop pest control, Math. Biosci. Eng. 18 (2021), no. 5, 5364--5391
Light MSSM Higgs boson scenario and its test at hadron colliders
Creators: name: Belyaev, Alexander
name: Cao, Qing-Hong
name: Nomura, Daisuke
name: Tobe, Kazuhiro
name: Yuan, C. -P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that in the Minimal Supersymmetric Standard Model, the possibility for the lightest CP-even Higgs boson to be lighter than $Z$ boson (as low as about 60 GeV) is, contrary to the usual belief, not yet excluded by LEP2 data or any other existing experimental data. The characteristic of the light Higgs boson scenario (LHS) is that the $ZZh$ coupling and the decay branching ratio ${\rm Br}(h/A\to b\bar{b})$ are simultaneously suppressed as a result of generic supersymmetric loop corrections. Consequently, the $W^\pm H^\mp h$ coupling has to be large due to the sum rule of Higgs couplings to weak gauge bosons. In addition to discussing the potential of the Tevatron and $B$-factories to test the LHS, we show that the associate neutral and charged Higgs boson production process, $pp\to H^\pm h (A)$, can completely probe LHS at the CERN Large Hadron Collider.
description: 4 pages, 2 figures, RevTex4
Toward a Redefinition of American Indian/Alaska Native Education
Creators: name: Hampton, Eber
Publisher: name: Canadian Journal of Native Education
Year: 2021

description: My name is Eber Hampton Jr. I was born in Talihina, Oklahoma and am a member of the Chickasaw nation as was my father Eber Hampton Sr. My mother Evelyn is white; her maiden name was Cowling. I have been educated in two cultural traditions. My white education was in public elementary and secondary schools, Westmont College, the University of California at Santa Barbara, and the Harvard Graduate School of Educa­ tion. My Indian education was different in both structure and content. While some of it was explicitly taught, I mostly felt as if I were acquiring my own knowledge with the assurance of elders who taught me a little of what they know of plants, ceremonies, and healing. ...
description: Canadian Journal of Native Education, Vol. 20 No. 2 (1993)
Oversampling errors in multimodal medical imaging are due to the Gibbs effect
Creators: name: Poggiali, Davide
name: Cecchin, Diego
name: Campi, Cristina
name: De Marchi, Stefano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 68U10, 65D05, 41A15

description: To analyse multimodal 3-dimensional medical images, interpolation is required for resampling which - unavoidably - introduces an interpolation error. In this work we consider three segmented 3-dimensional images resampled with three different neuroimaging software tools for comparing undersampling and oversampling strategies and to identify where the oversampling error lies. The results indicate that undersampling to the lowest image size is advantageous in terms of mean value per segment errors and that the oversampling error is larger where the gradient is steeper, showing a Gibbs effect.
HST/ACS observations of shell galaxies: inner shells, shell colours and dust
Creators: name: Sikkema, G.
name: Carter, D.
name: Peletier, R. F.
name: Balcells, M.
name: del Burgo, C.
name: Valentijn, E. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: AIM:Learn more about the origin of shells and dust in early type galaxies. METHOD: V-I colours of shells and underlying galaxies are derived, using HST Advanced Camera for Surveys (ACS) data. A galaxy model is made locally in wedges and subtracted to determine shell profiles and colours. We applied Voronoi binning to our data to get smoothed colour maps of the galaxies. Comparison with N-body simulations from the literature gives more insight to the origin of the shell features. Shell positions and dust characteristics are inferred from model galaxy subtracted images. RESULT: The ACS images reveal shells well within the effective radius in some galaxies (at 1.7 kpc in the case of NGC 5982). In some cases, strong nuclear dust patches prevent detection of inner shells. Most shells have colours which are similar to the underlying galaxy. Some inner shells are redder than the galaxy. All six shell galaxies show out of dynamical equilibrium dust features, like lanes or patches, in their central regions. Our detection rate for dust in the shell ellipticals is greater than that found from HST archive data for a sample of normal early-type galaxies, at the 95% confidence level. CONCLUSIONS: The merger model describes better the shell distributions and morphologies than the interaction model. Red shell colours are most likely due to the presence of dust and/or older stellar populations. The high prevalence and out of dynamical equilibrium morphologies of the central dust features point towards external influences being responsible for visible dust features in early type shell galaxies. Inner shells are able to manifest themselves in relatively old shell systems.
description: accepted by A&A; 36 Figures, 25 pages. A version with full resolution Figures can be found here: http://www.astro.rug.nl/~sikkema/shells.ps
A Model-Based Approach to Synthetic Data Set Generation for Patient-Ventilator Waveforms for Machine Learning and Educational Use
Creators: name: van Diepen, A.
name: Bakkes, T. H. G. F.
name: De Bie, A. J. R.
name: Turco, S.
name: Bouwman, R. A.
name: Woerlee, P. H.
name: Mischi, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Although mechanical ventilation is a lifesaving intervention in the ICU, it has harmful side-effects, such as barotrauma and volutrauma. These harms can occur due to asynchronies. Asynchronies are defined as a mismatch between the ventilator timing and patient respiratory effort. Automatic detection of these asynchronies, and subsequent feedback, would improve lung ventilation and reduce the probability of lung damage. Neural networks to detect asynchronies provide a promising new approach but require large annotated data sets, which are difficult to obtain and require complex monitoring of inspiratory effort. In this work, we propose a model-based approach to generate a synthetic data set for machine learning and educational use by extending an existing lung model with a first-order ventilator model. The physiological nature of the derived lung model allows adaptation to various disease archetypes, resulting in a diverse data set. We generated a synthetic data set using 9 different patient archetypes, which are derived from measurements in the literature. The model and synthetic data quality have been verified by comparison with clinical data, review by a clinical expert, and an artificial intelligence model that was trained on experimental data. The evaluation showed it was possible to generate patient-ventilator waveforms including asynchronies that have the most important features of experimental patient-ventilator waveforms.
The quintic interaction vertex in light-cone gravity
Creators: name: Ananth, Sudarshan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider pure gravity in light-cone gauge and derive the complete quintic interaction vertex. Up to quartic order, the Kawai-Lewellen-Tye (KLT) relations can be made manifest at the level of the Einstein-Hilbert Lagrangian. The quintic interaction vertex represents an essential first step in further extending the off-shell validity of the KLT relations to higher order vertices.
description: 9 pages
Μακεδονική υαλουργία του 4ου αι. π.Χ.: το άχρωμο γυαλί
Creators: name: Ιγνατιάδου, Δέσποινα Ν.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Υαλουργία
Αχρωμο γυαλί
Αγγεία
Πεσσοί
Υαλοενθέματα
Glassworking
Colorless glass
Gaming counters
Glass inlays

description: Κατά το δεύτερο μισό του 4ου αι. π.Χ. η Μακεδονία έφθασε στο απόγειο της πολιτικής της ισχύος έναντι της υπόλοιπης Ελλάδας και έθεσε τα θεμέλια μιας τεράστιας αυτοκρατορίας στην Ασία και την Αίγυπτο. Οι τρέχουσες ανασκαφές αποκαλύπτουν το υψηλό πολιτιστικό επίπεδο της Μακεδονικής πατρώας γης. Μεταξύ άλλων πολύτιμων ευρημάτων εξαιρετικής τέχνης τέχνης ανευρίσκονται αγγεία, ενθέματα, κοσμήματα και πεσσοί επιτραπέζιων παιχνιδιών από άχρωμο γυαλί. Τα γυάλινα αυτά αντικείμενα αποκαλύπτουν μια εκτεταμένη και ποικίλη χρήση του άχρωμου γυαλιού χωρίς προηγούμενο στον αρχαίο κόσμο. Στη μελέτη αναλύονται τεχνοτροπικές παράμετροι, αλλά και ζητήματα υαλοτεχνίας, σε μια προσπάθεια να ενταχθούν τα προϊόντα και οι σχετικές ελάσσονες παράλληλες παραγωγές στο πολιτιστικό τους πλαίσιο. Στα παραρτήματα παρατίθενται ένα δίγλωσσο γλωσσάριο, η αρχαιομετρική έρευνα, καθώς και εκτεταμένος κατάλογος προελεύσεων και ανασκαφικών δεδομένων. Πολλοί παράγοντες υποδεικνύουν εντοπιότητα της υαλουργικής παραγωγής στη Μακεδονία, κατά τη διάρκεια της βασιλείας του Φιλίππου Β' και πιθανόν επίσης και του Αλεξάνδρου Γ'. Η τυπολογική και ποιτική συγγένεια των γυάλινων ευρημάτων με τα σύγχρονά τους από άλλο υλικό, υποδεικνύουν φανερά πως η υαλουργική τέχνη είναι ανάλογη του υψηλού καλλιτεχνικού επιπέδου της περιοχής
description: During the second half of the 4th century BC, Macedon reached the peak of its political power over the rest of Greece and laid the foundations of an immense empire over Asia and Egypt. Current excavations reveal the high cultural level of Mecedonian heartland. Among other finds of precious material and excellent craftsmanship, are unearthed vessels, inlays, jewelry and gaming counters made of colorless glass. These glass objects disclose an extensive and diverse use of colorless glass unprecedented in the ancient world. In the study are discussed stylistic aspects, as well as matters of glass technology, in an effort to place all products, and the relevant minor parallel productions, in cultural context. In the appendices appear a bilingual glossary, the archaemetric research, and an extensive list of all provenances and excavation data. There are many factors, which support the possibility of local glassworking in Macedonia, during the reign of Philip II and probably also Alexander III. The typological and qualitative proximity of the glass to their contemporaries in other materials clearly shows that the craft is in accordance with the high artistic and technological level of the region
Car Conversations
Creators: name: Hammond, Jon
name: Hicks, Lucille
name: Grant, Laura
name: Turner, Julie
name: Marine, Mandy
name: Tex, Carly
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: xaw

description: This file, taken during a highway drive, consists of general conversation among the speakers as well as discussion of various sites seen along the road.
Αμφίπλευρος συντονισμός των κολυμβητικών κινήσεων και η σχέση του με το επίπεδο απόδοσης και τη συχνότητα κίνησης
Creators: name: Νικοδέλης, Θωμάς Κ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Αμφίπλευρος συντονισμός
Τρισδιάστατη ανάλυση
Συντονισμός στην κολύμβηση
Interlimb coordination
Swimming coordination
3D-DLT underwater

description: Ο σκοπός της εργασίας ήταν να εξεταστεί η επίδραση του επιπέδου απόδοσης και της κολυμβητικής ταχύτητας στην αμφίπλευρο συντονισμό των άνω άκρων στο ελεύθερο. Στην έρευνα συμμετείχαν 5 αθλητές υψηλού επιπέδου και 7 αρχάριοι. Κολύμπησαν 2 προσπάθειες των 25 μέτρων μια σε μέγιστη ένταση και μια σε ήρεμο ρυθμό. Εγινε 3D-DLT ανάλυση με τέσσερις κάμερες για την εξαγωγή των συντεταγμένων όλων των ανατομικών σημείων. Εξετάστηκε η χωρική και χρονική σχέση ανάμεσα στα άνω άκρα με τρεις μεθοδολογίες α) ποιοτική αξιολόγηση των τροχιών των μετακαρπίων. Εμφανίστηκε ομοιότητα ανάμεσα στις τροχιές β)τη μέγιστη τιμή του συντελεστή διαγώνιας συσχέτισης για τα μετακάρπια. Παρατηρήθηκε ισχυρή γραμμικότητα μεταξύ των μετακαρπίων σε κάθε περίπτωση. Ισχυρότερη ήταν η σύζευξη της στην μέγιστη ταχύτητα, ενώ δεν υπήρχαν διαφορές ανάμεσα στις ομάδες. Η χρονική διαφορά ήταν πάντα κοντά στα Omser γ) Το συνημίτονο της γωνίας των επιμέρους μελών τηων άνω άκρων ανά ζεύγη(παλάμες, πήχεις, βραχίονες). Η αύξηση της ταχύτητας μείωσε την μεταβλητότητα του τύπου συντονισμού και για τα τρία ζεύγη. Οι βραχίονες πλησίασαν προς μια αντισυμμετρική σύζευξη(180ο)
description: The purpose of the study was to examine the influence of skill level and swimming speed on interlimb coordination dynamics of freestyle swimming movements in relation to the intrinsic mti-phase model of coordination. Fire elite nad seven novice swimmers swim a sprint and a selfpaced trial. A 3D-DLT analysis was held. The spatiotemporal interlimb relationship was reflected in : a) a qualitative examination of the two hands' endroint trajectories b)the peak amplitute and the time lag of the cross correlation function between the hands' endpoint trajectories c) the cosine of the angle of the individual pairs of the segments comprising the upper limb. The intrinsic anti-phase interlimb relationship is strongly preserved despite the environmental influence of the water concerning the endpoints of the arms. The increase of movement speed results in a stronger interlimb coupling
Differential Density Statistics of Galaxy Distribution and the Luminosity Function
Creators: name: Albani, Vinicius V. L.
name: Iribarrem, Alvaro S.
name: Ribeiro, Marcelo B.
name: Stoeger, William R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper uses data obtained from the galaxy luminosity function (LF) to calculate two types of radial number densities statistics of the galaxy distribution as discussed in Ribeiro (2005), namely the differential density $γ$ and the integral differential density $γ^\ast$. By applying the theory advanced by Ribeiro and Stoeger (2003), which connects the relativistic cosmology number counts with the astronomically derived LF, the differential number counts $dN/dz$ are extracted from the LF and used to calculate both $γ$ and $γ^\ast$ with various cosmological distance definitions, namely the area distance, luminosity distance, galaxy area distance and redshift distance. LF data are taken from the CNOC2 galaxy redshift survey and $γ$ and $γ^\ast$ are calculated for two cosmological models: Einstein-de Sitter and an $Ω_{m_0}=0.3$, $Ω_{Λ_0}=0.7$ standard cosmology. The results confirm the strong dependency of both statistics on the distance definition, as predicted in Ribeiro (2005), as well as showing that plots of $γ$ and $γ^\ast$ against the luminosity and redshift distances indicate that the CNOC2 galaxy distribution follows a power law pattern for redshifts higher than 0.1. These findings bring support to Ribeiro's (2005) theoretical proposition that using different cosmological distance measures in statistical analyses of galaxy surveys can lead to significant ambiguity in drawing conclusions about the behavior of the observed large scale distribution of galaxies.
description: LaTeX, 37 pages, 6 tables, 10 figures. Accepted for publication in "The Astrophysical Journal"
A quantitative rigidity result for a two-dimensional Frenkel-Kontorova model
Creators: name: Dipierro, Serena
name: Poggesi, Giorgio
name: Valdinoci, Enrico
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider a Frenkel-Kontorova system of harmonic oscillators in a two-dimensional Euclidean lattice and we obtain a quantitative estimate on the angular function of the equilibria. The proof relies on a PDE method related to a classical conjecture by E. De Giorgi, also in view of an elegant technique based on complex variables that was introduced by A. Farina. In the discrete setting, a careful analysis of the reminders is needed to exploit this type of methodologies inspired by continuum models.
Θέματα υπερβολικής ανάλυσης (φράγματα παραγώγων των πυρήνων θερμότητας σε υπερβολικούς χώρους και για Kleinian ομάδες)
Creators: name: Τσελεπίδης, Θεόδωρος Ε.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Mathematical analysis
Φράγματα
Πυρήνας θερμότητας
Παράγωγος
Kleinian ομάδα
Τελεστής του Laplace
Bounds
Heat kernel
Derivative
Kleinian group
Laplace operator

description: Στη διατριβή αυτή βρίσκονται καινούργια φράγματα για τους πυρήνες θερμότητας στους υπερβολικούς χώρους και για τους πυρήνες θερμότητας για Kleinian ομάδες. Συγκεκριμένα βρίσκονται άνω φράγματα για τις παραγώγους του πυρήνα θερμότητας στον ΙΗ^(n+1) μέχρι δεύτερης τάξης(παράγωγος ως προς το χρόνο, κλίση, Εσσιανή και διπλή παράγωγος). Από αυτά, το φράγμα για την κλίση είναι και κάτω φράγμα, επομένως ακριβές. Επίσης βρίσκονται άνω φράγματα για τις ιδέες παραγώγους του πυρήνα θερμότητας για μια Kleinian ομάδα, η οποία δρα στον ΙΗ^(n+1). Σε όλα τα φράγματα περιέχεται το κατώτερο σημείο του φάσματος του αντίστοιχιυ τελεστή του Laplace
description: In this dissertation there are new bounds about the heat Kernels on kyperbolic spaces and the heat Kernels for Kleinian groups. Indeed, there are upper bounds for the derivatives of the heat Kernel on IH^(n+1) up to second order(time derivative, gradient, hessian and cross derivative). Among these, the bound for the gradient is a lower too, consequently it is sharp. Also, there are upper bounds for the same derivatives of the heat Kernel for a Kleinian group, which acts on IH^(n+1). All these bounds contain the bottom of the spectrum of the Laplace operator
The NIRVANDELS Survey: a robust detection of $α$-enhancement in star-forming galaxies at $z\simeq3.4$
Creators: name: Cullen, F.
name: Shapley, A. E.
name: McLure, R. J.
name: Dunlop, J. S.
name: Sanders, R. L.
name: Topping, M. W.
name: Reddy, N. A.
name: Amorin, R.
name: Begley, R.
name: Bolzonella, M.
name: Calabro, A.
name: Carnall, A. C.
name: Castellano, M.
name: Cimatti, A.
name: Cirasuolo, M/
name: Cresci, G.
name: Fontana, A.
name: Fontanot, F.
name: Garilli, B.
name: Guaita, L.
name: Hamadouche, M.
name: Hathi, N. P.
name: Mannucci, F.
name: McLeod, D. J.
name: Pentericci, L.
name: Saxena, A.
name: Talia, M.
name: Zamorani, G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present results from the NIRVANDELS survey investigating the gas-phase metallicity ($\mathrm{Z}_{\mathrm{gas}}$, tracing O/H) and stellar metallicity ($Z_{\star}$, tracing Fe/H) of 33 star-forming galaxies at redshifts $2.95 < z < 3.80$. Based on a combined analysis of deep optical and near-IR spectra, tracing the rest-frame far ultraviolet and rest-frame optical respectively, we present the first simultaneous determination of the stellar and gas-phase mass-metallicity relationships (MZRs) at $z\simeq3.4$. In both cases, we find that metallicity increases with increasing stellar mass ($M_{\star}$), and that the power-law slope at $M_{\star} \lesssim 10^{10} \mathrm{M}_{\odot}$ of both MZRs scales as $Z \propto M_{\star}^{0.3}$. Comparing the stellar and gas-phase MZRs, we present direct evidence for super-solar O/Fe ratios (i.e., $α$-enhancement) at $z>3$, finding $\mathrm{(O/Fe)}\simeq (2.54 \pm 0.38) \times \mathrm{(O/Fe)}_{\odot}$, with no clear dependence on $M_{\star}$.
description: 18 pages, 11 figures, MNRAS accepted
Confluences thematiques et techniques chez J. Giraudoux et E. Ionesco
Creators: name: Κοφίδου, Αγγελική Κ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Διακειμενικότητα
Θέατρο
Intertextuality
Theatre

description: Η παρούσα μελέτη έχει σαν στόχο τη συγκριτική αντιπαράθεση του έργου δυο δραματουργών, εκπροσώπων του σύγχρονου γαλλικού θεάτρου : του Ζαν Ζιρωντού και του Ευγένιου Ιονέσκο. Μέσα από τη συγκριτική αντιπαράθεση φιλοδοξούμε να αποδείξουμε ότι οι θεατρική αυτοί συγγραφείς, έγραψαν ένα "ποιητικό θέατρο" στα χνάρια εκείνων που μίλησαν για "ένα θέατρο της ποίησης" στις πρώτες δεκαετίες του 20ου αι. Πριν περάσουμε στην αντιπαράθεση των δραματικών έργων, παρουσιάζουμε βιογραφικά στοιχεία των δυο δραματουργών και κάνουμε μια λεπτομερή αναφορά στον ιστορικό-κοινωνικό τους περίγυρο. Ακολουθεί η συγκριτική μελέτη των θεατρικών τους έργων οι απ'οπου αναδύονται θεματικές και τεχνικές συγκλίσεις που συνδέουν το έργο των δυο θεατρικών συγγραφέων. Για να μπορέσουμε να καταλήξουμε σε ορθά συμπεράσματα κάνουμε μια σύντομη αναδρομή στις πηγές της γαλλικής θεατρικής παράδοσης. Η όλη μελέτη γίνεται με πρωταρχικό μεθοδολογικό εργαλείο τη διακειμενικότητα. Κατά ένα δεύτερο λόγο κάνουμε χρήση της κλασικής μεθόδου σύγκρισης. Κατόπιν τούτου, διατυπώνουμε μια συγκλίνουσα δραματική "ποιητική" με κριτήρια την "ποιοτικότητα" τη "λογοτεχνικότητα" και τη "θεατρικότητα" των έργων τους
description: The present study has a object to confront two great dramatists of the french modern theatre : Jean Giraudoux and Eugene Ionesco. Our ambition is to show that they wrote a "poetic theatre" the same way than others had talked about "a theatre of poetry" in the first years of the XX century. Before proceeding to the confrontation of the two dramatisits'plays we presented a biography of the two dramatists contenting historical and social elements of their area. Follows a comparative study prouving that there are confluences thematics and techniques between the two dramatists. Our methodological support is the intertextuality in the first place and in a second place the traditional comparatist methode. Finally we acced to a drama "art poetic" confluent for the two french dramatists, using the criteres of "poehrity", "litterarity" and "theatrality' in the plays of the two dramatists
Additional file 2: of Sodium new houttuyfonate suppresses metastasis in NSCLC cells through the Linc00668/miR-147a/slug axis
Creators: name: Jiang, Rilei
name: Hu, Cheng
name: Li, Qian
name: Cheng, Ziyu
name: Gu, Ling
name: Li, Hongxiao
name: Guo, Yuanyuan
name: Li, Qirui
name: Lu, Yueyang
name: Li, Ke
name: Chen, Meijuan
name: Zhang, Xu
Publisher: name: figshare
Year: 2019
Subjects: subject: Cell Biology
subject: Molecular Biology
subject: Pharmacology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer

description: Table S1. Primers for qRT-PCR. (PDF 36 kb)
Non-Abelian Vortices of Higher Winding Numbers
Creators: name: Eto, Minoru
name: Konishi, Kenichi
name: Marmorini, Giacomo
name: Nitta, Muneto
name: Ohashi, Keisuke
name: Vinci, Walter
name: Yokoi, Naoto
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We make a detailed study of the moduli space of winding number two (k=2) axially symmetric vortices (or equivalently, of co-axial composite of two fundamental vortices), occurring in U(2) gauge theory with two flavors in the Higgs phase, recently discussed by Hashimoto-Tong (hep-th/0506022) and Auzzi-Shifman-Yung (hep-th/0511150). We find that it is a weighted projective space WCP^2_(2,1,1)=CP^2/Z_2. This manifold contains an A_1-type (Z_2) orbifold singularity even though the full moduli space including the relative position moduli is smooth. The SU(2) transformation properties of such vortices are studied. Our results are then generalized to U(N) gauge theory with N flavors, where the internal moduli space of k=2 axially symmetric vortices is found to be a weighted Grassmannian manifold. It contains singularities along a submanifold.
description: 32 pages, 1 figure, the final version published in PRD
Human ceruloplasmin gene and cDNA
Creators: name: Wager, William R.
Publisher: name: University of British Columbia
Year: 2008

description: Ceruloplasmin is a 132Kda serum protein found in all vetebrates. The protein ismulti-functional. Functions include copper transport, serum and tissue anti-oxidant and anti-coagulation modulation. The cDNA of ceruloplasmin sharehomology with the cDNAs of factors V and VIII of the blood coagulation cascade,suggesting that the three genes evolved from a common ancestral gene. Thereare two ceruloplasmin specific mRNA transcripts, 3.7 and 4.4 Kb, produced bythe liver. Expression of the gene is regulated transcriptionally and post-transcriptionally. The initial aim of this study was to isolate the 3' end of the gene and todetermine the evolutionary relationship with the factor V and VIII genes.Further aims were to isolate and characterize the 5' and 3' ends of the cDNA inorder to determine their role in the regulation of gene expression. The gene for human ceruloplasmin is 38 Kbp in length and is composed of atleast 19 exons separated by 18 introns. The exact number of 5' and 3'untranslated exons is unclear at the present. The gene structure of ceruloplasminshares homology with the genes for factor V and VIII. The 4 amino acid additionreported by Yang et al., (1986) is produced by use of an alternate splice junctionat the 3' end of exon 18. A 5' cDNA clone that contained 114 by prior to theinitiator methionine was isolated. The clone is produced by splicing of theprimary heteronuclear transcript. The origin of the 5' end of the clone isunmapped at the present. A series of 3' cDNA clones was isolated. All the clonesencode the COOH-terminus of the protein, but differ from the 3' genomicsequence at points beyond the stop codon. The clones diverge from the genomicsequence at splice junction consensus site. The origin of the 3' untranslated sequence is unmapped at the present. One 3'clone hybridizes only to the 4.4 Kb transcript. The ceruloplasmin gene probably diverged from the ancestral gene before thedivergence of the genes for factor V and VIII. The two different length mRNAtranscripts are a result of both 5' and 3' untranslated sequence additions to thecoding mRNA. The role of these untranslated sequences in regulation ofceruloplasmin gene expression is unclear at the present.
Gravity in $d=2+ε$ dimensions and realizations of the diffeomorphisms group
Creators: name: Martini, Riccardo
name: Ugolotti, Alessandro
name: Del Porro, Francesco
name: Zanusso, Omar
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss two distinct realizations of the diffeomorphism group for metric gravity, which give rise to theories that are classically equivalent, but quantum mechanically distinct. We renormalize them in $d=2+ε$ dimensions, developing a new procedure for dimensional continuation of metric theories and highlighting connections with the constructions that previously appeared in the literature. Our hope is to frame candidates ultraviolet completions of quantum gravity in $d>2$ and give some perturbative mean to assess its existence in $d=4$, but also to speculate on some potential obstructions in the continuation of such candidates to finite values of $ε$. Our results suggest the presence of a conformal window in $d$ which seems to extend to values higher than four.
description: 17 pages, 1 figure; v2: improved draft in response to feedback
L'activite des services culturels des musees francais depuis 1958 dans l'art et la litterature
Creators: name: Βεργή, Ζηνοβία Μ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Πολιτιστικές υπηρεσίες
Λογοτεχνία
Cultural services
Literature

description: Διάφορες τάσεις την κοινωνικοπολιτιστική πολιτικής έχουν δώσει ένα νέο χαρακτήρα και ιδιαίτερο ρόλο στα γαλλικά μουσεία. Με καινούργιες τάσεις προτάσεις για τον τρόπο λειτουργία τους το γαλλικό μουσείο γίνεται ένας χώρος όπου το κοινό έρχεται σ'επαφή με το έργο τέχνης με σκοπό να πληροφορηθεί, να διδαχθεί και να ψυχαγωγηθεί. Οι καινούργιες δραστηριότητες, σε σχέση με τον αρχικό ρόλο του μουσείου : την έκθεση και την επιμόρφωση, αλλάζουν την φυσιογνωμία του γαλλικού μουσείου μέσα στην καταναλωτική κοινωνία . Το μουσείο περνά από την μουσειοποίηση στον πολιτισμό της μάζας. Μέσα στο γαλλικό μουσείο, η ιστορικότητα, που δείχνει μια εικόνα του παρελθόντος και μια ματεριαλιστική ιστορικότητα, με έναν ιδεαλισμό για τον θαυμασμό στα αριστουργήματα, περνά σε μια άλλη στρατηγική που οδηγεί στην αύξηση του πλήθους. Το μουσείο γίνεται μέσο διάδοσης, πληροφόρησης του πολιτισμού με τα εκπαιδευτικά και πολιτισμικά μέσα, την τεχνολογία και τα μέσα ενημέρωσης
description: Various trends of sociocultural policy have given a new character and special role in French museums with new trends and proposal for their way of operation, the French museums becomes a place where the public is in contact with the objects of all in order to be informed, to be taught and to be entertained. The new archives in relation with the initial role of the museum : the collection, the exposition and the education, change the physiognomy of french museum within the consumer's society. The museum passes from the museisation to the mass culture. In the French museums, the historicity, which which shows an image of the pair and an imperialistic historicity, within an idealism for tha admiration for the masterpieces, passes to another strategy, which leads to increase of crowd. The museum becomes a transmission means for culture information with educational and cultural means, the technology and information means
ASMNet: a Lightweight Deep Neural Network for Face Alignment and Pose Estimation
Creators: name: Fard, Ali Pourramezan
name: Abdollahi, Hojjat
name: Mahoor, Mohammad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Active Shape Model (ASM) is a statistical model of object shapes that represents a target structure. ASM can guide machine learning algorithms to fit a set of points representing an object (e.g., face) onto an image. This paper presents a lightweight Convolutional Neural Network (CNN) architecture with a loss function being assisted by ASM for face alignment and estimating head pose in the wild. We use ASM to first guide the network towards learning a smoother distribution of the facial landmark points. Inspired by transfer learning, during the training process, we gradually harden the regression problem and guide the network towards learning the original landmark points distribution. We define multi-tasks in our loss function that are responsible for detecting facial landmark points as well as estimating the face pose. Learning multiple correlated tasks simultaneously builds synergy and improves the performance of individual tasks. We compare the performance of our proposed model called ASMNet with MobileNetV2 (which is about 2 times bigger than ASMNet) in both the face alignment and pose estimation tasks. Experimental results on challenging datasets show that by using the proposed ASM assisted loss function, the ASMNet performance is comparable with MobileNetV2 in the face alignment task. In addition, for face pose estimation, ASMNet performs much better than MobileNetV2. ASMNet achieves an acceptable performance for facial landmark points detection and pose estimation while having a significantly smaller number of parameters and floating-point operations compared to many CNN-based models.
description: Accepted at CVPR 2021 Biometrics Workshop, jointly with the Workshop on Analysis and Modeling of Faces and Gestures
Εφαρμογές τεχνικών ιστοκαλλιέργειας στην αγριοκερασιά Prunus avium L.
Creators: name: Mahmoud, Samir M. Said
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Prunus avium L.

description: Το διδακτορικό σύστησε ένα ολοκληρωμένο πρωτόκολλο για το πολλαπλασιασμό της αγριοκερασιάς με την τεχνική της ιστοκαλλιέργειας
description: A full protocol on the propagation of Prunus avium L. was recomended and observed by tissue culture
Dynamical symmetry of isobaric analog 0+ states in medium mass nuclei
Creators: name: Sviratcheva, K. D.
name: Georgieva, A. I.
name: Draayer, J. P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: An algebraic sp(4) shell model is introduced to achieve a deeper understanding and interpretation of the properties of pairing-governed 0+ states in medium mass atomic nuclei. The theory, which embodies the simplicity of a dynamical symmetry approach to nuclear structure, is shown to reproduce the excitation spectra and fine structure effects driven by proton-neutron interactions and isovector pairing correlations across a broad range of nuclei.
description: 7 pages, 5 figures
Η κυρωτική αρμοδιότητα της Επιτροπής Κεφαλαιαγοράς και ο δικαστικός της έλεγχος
Creators: name: Παγώνη, Σοφία Δ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Επιτροπή Κεφαλαιαγοράς
Κατάχρηση αγοράς
Χειραγώγηση αγοράς
Σύγκρουση συμφερόντων
Capital Market Commission
Market abuse
Market manipulation
Conflict of interestes

description: Η Ελληνική Επιτροπή Κεφαλαιαγορά είναι αυτόνομη εποπτική αρχή που λειτουργεί με τη Μορφή Νομικού Προσώπου Δημοσίου Δικαίου. Οι αρμοδιότητες και η λειτουργία της διέπονται κυρίως από τους νόμους 1969/91, 2396/96, το π.δ. 25/2003 και το νόμο 3152/2003. Ως νομικό πρόσωπο του δημόσιου τομέα, η Επιτροπή Κεφαλαιαγοράς τελεί υπό την εποπτεία του Υπουργείου Οικονομίας και Οικονομικών. Στόχοι της εποπτείας της Κεφαλαιαγοράς από την Επιτροπή Κεφαλαιαγοράς είναι η διασφάλιση της ομαλής και εύρυθμης λειτουργίας της Κεφαλαιαγοράς, η ενίσχυση της εμπιστοσύνης κοινού με την προώθηση της διαφάνειας και την πρόληψη και καταστολή χρηματιστηριακών παραβάσεων. Για την επίτευξη των στόχων αυτών, η Επιτροπή Κεφαλαιαγοράς δύναται να θέτει κανόνες λειτουργίας της αγοράς και να λαμβάνει τα απαραίτητα μέτρα για την αφαρμογή των νόμων και των κανόνων που έχουν θεσπισθεί, καθώς και να επιβάλλει κυρώσεις σε περιπτώση παραβάσεων. Το ελληνικό δίκαιο της Κεφαλαιαγοράς πρόκειται να προσαρμοστεί σε όλες τις νέες σχετικές Ευρωπαϊκές Οδηγίες(2003/6/ΕΚ, 2003/71/ΕΚ, 2004/39/ΕΚ)
description: The Hellenic Capital Market Commission(HCMC) is an independent decision-making body, in the form of a Public Law Legal Entity operating under the supervision of the Ministry of National Economy. The law 1969/91, 2396/96, 25/2003 and 3152/2003 regulate its operation. Its main objective is to promote the establishment of sound conditions for the operation of the capital market and to enhance public confidence both in the quality of supervision and behavior. In order to achieve this objective the Capital market Commission sets the general terms and conditions governing the organization and operation of the capital market issues instructions on compliance procedures. It also introduces the measures that are useful for ensuring the proper functioning of the market. The Greek capital market law has to be harmonized with all the new directives of the European Union(2003/6/EC, 2003/71/EC, 2004/39/EC)
No H_0 Assistance from Assisted Quintessence
Creators: name: Sabla, Vivian I.
name: Caldwell, Robert R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Early dark energy, as a proposed solution to the Hubble tension, faces an additional "why now" problem. Why should dark energy emerge just prior to recombination, billions of years before the onset of cosmic acceleration? Assisted quintessence explains this connection by positing that multiple scaling fields build up over time to drive the present-day cosmic acceleration. In this framework, early dark energy is inevitable. Yet, we show that scaling also leads to the demise of the scenario: the same feature that solves the coincidence problem then spoils a concordance of the Hubble constant inferred from the cosmic microwave background with that from the local distance ladder. The failure of the model offers a novel lesson on the ability of new physics to resolve the Hubble tension.
description: 18 pages, 10 figures; minor changes to match published version; Data available at https://doi.org/10.5281/zenodo.4708308
Loop Quantum Cosmology in Bianchi Type I Models: Analytical Investigation
Creators: name: Chiou, Dah-Wei
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The comprehensive formulation for loop quantum cosmology in the spatially flat, isotropic model was recently constructed. In this paper, the methods are extended to the anisotropic Bianchi I cosmology. Both the precursor and the improved strategies are applied and the expected results are established: (i) the scalar field again serves as an internal clock and is treated as emergent time; (ii) the total Hamiltonian constraint is derived by imposing the fundamental discreteness and gives the evolution as a difference equation; and (iii) the physical Hilbert space, Dirac observables and semi-classical states are constructed rigorously. It is also shown that the state in the kinematical Hilbert space associated with the classical singularity is decoupled in the difference evolution equation, indicating that the big bounce may take place when any of the area scales undergoes the vanishing behavior. The investigation affirms the robustness of the framework used in the isotropic model by enlarging its domain of validity and provides foundations to conduct the detailed numerical analysis.
description: 53 pages, 2 figures; more typos corrected; HyperTeX enabled
Isospin symmetry breaking in an algebraic pairing Sp(4) model
Creators: name: Sviratcheva, K. D.
name: Georgieva, A. I.
name: Draayer, J. P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: An exactly solvable sp(4) algebraic approach extends beyond the traditional isospin conserving nuclear interaction to bring forward effects of isospin symmetry breaking and isospin mixing resulting from a two-body nuclear interaction that includes proton-neutron (pn) and like-particle isovector pairing correlations plus significant isoscalar pn interactions. The model yields an estimate for the extent to which isobaric analog 0+ states in light and medium mass nuclei may mix with one another and reveals possible, but still extremely weak, non-analog beta-decay transitions.
description: 8 pages, 2 figures