cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Characterization of very wide companion candidates to young stars with planets and disks
Creators: name: Majidi, F. Z.
name: Desidera, S.
name: Alcalá, J. M.
name: Frasca, A.
name: D'Orazi, V.
name: Bonnefoy, M.
name: Claudi, R.
name: Gratton, R.
name: Mesa, D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Discovering wide companions of stellar systems allows us to constrain the dynamical environment and age of the latter. We studied four probable wide companions of four different stellar systems. The central stars are V4046 Sgr, HIP 74865, HIP 65426, and HIP 73145, and their probable wide companions are 2MASS J18152222-3249329, 2MASS J15174874-3028484, 2MASS J13242119-5129503, and 2MASS J14571503-3543505 respectively. V4046 Sgr is a member of $β$-Pictoris Moving Group while the rest of the stellar systems are acknowledged as members of the Scorpius-Centaurus association. The selected stellar systems are particularly interesting because all of them are already known to possess a low-mass companion and/or a spatially resolved disk. Identifying wider companions of these stars can improve their eligibility as benchmarks for understanding the formation channels of various triple systems, and can help us to determine the orbits of their possibly undiscovered inner, wider companions in case of higher multiplicity. We find that 2MASS J15174874-3028484 (0.11 $M_{\odot}$, 7.4$\pm$0.5 Myr), an already recognized pre-main sequence (PMS) member of Scorpius-Centaurus association, is a highly probable wide companion of HIP 74865. 2MASS J13242119-5129503 (0.04 $M_{\odot}$, 16$\pm$2.2 Myr) is ruled out as a plausible wide companion of HIP 65426, but confirmed to be a new sub-stellar member of the Scorpius-Centaurus association. 2MASS J14571503-3543505 (0.02 $M_{\odot}$, 17.75$\pm$4.15 Myr) is a probable sub-stellar member of the same association, but we cannot confirm whether or not it is gravitationally bound to HIP 73145. 2MASS J18152222-3249329 (0.3 $M_{\odot}$, older than 150 Myr) is determined to be a mildly active main sequence (MS) star, much older than members of $β$-Pictoris Moving Group, and unbound to V4046 Sgr despite their similar kinematic features.
description: 13 pages, 9 figures, 8 tables
H λεπτή κινητικότητα μέσα από τη διαδικασία μάθησης Δραστηριοτήτων Καθημερινής Ζωής για παιδιά και εφήβους με μέτρια Νοητική Ανεπάρκεια:
Creators: name: Γκιουζένη, Αθηνά Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Νοητική ανεπάρκεια
λεπτή κινητικότητα
αντίληψη
Δ.Κ.Ζ. (Δραστηριότητες Καθημερινής Ζωής)
Mental retardation
fine motor skills
perception
activities of daily living

description: Σκοπός της διατριβής ήταν να αναλύσουμε δραστηριότητες καθημερινής ζωής και να τις επαναδομήσουμε ενσωματώνοντας στη διαδικασία εκτέλεσής τους, αντιληπτικές ασκήσεις, ασκήσεις λεπτής κινητικότητας, οπτικοκινητικού συντονισμού, οπτικής διάκρισης και διαχωρισμού και ασκήσεις αντίληψης σχέσεων στο χώρο. Μελετήσαμε συγκρίναμε μέσο του Κριτηρίου αντιληπτικής λειτουργίας την αποτελεσματικότητα αυτού του είδους παρέμβασης στην καθημερινή ζωή των ατόμων με μέτρια νοητική ανεπάρκεια. Τα ενθαρρυντικά αποτελέσματα , μας ενισχύουν στην άποψη για τη συγκρότηση ενός προγράμματος αποκατάστασης που σχεδόν όλες ή και πλήρως όλες οι σχολικές θεματικές ενότητες να συμπεριλαμβάνονται σε κατάλληλα δομημένες δραστηριότητες καθημερινής ζωής. Έτσι αποβλέπουμε σε μία αποκαταστασιακή πολιτική που ο ρόλος του σχολείου θα είναι επικουρικός και το βασικό πεδίο αποκατάστασης θα είναι χώρος μόνιμης διαμονής του ατόμου με μέτρια νοητική ανεπάρκεια δηλ. η κουζίνα, το μπάνιο, το υπνοδωμάτιο ή ο κήπος του σπιτιού τους.
description: The aim of this dissertation is the analysis of the activities of daily life and their reconstruction through the incorporation of perceptual, fine motor ,eye-hand coordination, visual discrimintaion and space rlationships perception exercises into the process of functioning. We have evaluated the effectiveness of such intervention in the everyday life of people with moderate mental retardation, using the Perceptual Function criteria..The encouraging results reinforce the idea of constructing an intervention programme where all the aspects of the school domains will be contained in appropriately structured every day activities. Thereby, we aim at a remediation policy where the role of the school will be subsidiary and the basic area of remediation will be the residenceof the persons with moderate retardation that is ,their bathroom, their kitchen, their bedroom and their house garden.
Universal Index Theorem on $Mob(S^1)\Diff_+(S^1)$
Creators: name: Teo, Lee-Peng
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: Primary 30C55 Secondary 58J52, 45B05

description: By conformal welding, there is a pair of univalent functions $(f,g)$ associated to every point of the complex Kähler manifold $\Mob(S^1)\bk\Diff_+(S^1)$. For every integer $n\geq 1$, we generalize the definition of Faber polynomials to define some canonical bases of holomorphic $1-n$ and $n$ differentials associated to the pair $(f,g)$. Using these bases, we generalize the definition of Grunsky matrices to define matrices whose columns are the coefficients of the differentials with respect to standard bases of differentials on the unit disc and the exterior unit disc. We derive some identities among these matrices which are reminiscent of the Grunsky equality. By using these identities, we showed that we can define the Fredholm determinants of the period matrices of holomorphic $n$ differentials $N_n$, which are the Gram matrices of the canonical bases of holomorphic $n$-differentials with respect to the inner product given by the hyperbolic metric. Finally we proved that $\det N_n =(\det N_1)^{6n^2-6n+1}$ and $\pa\bar{\pa}\log\det N_n$ is $-(6n^2-6n+1)/(6πi)$ of the Weil-Petersson symplectic form.
description: 46 pages
Which feedback mechanisms dominate in the high-pressure environment of the Central Molecular Zone?
Creators: name: Barnes, Ashley T.
name: Longmore, Steven N.
name: Dale, James E.
name: Krumholz, Mark R.
name: Kruijssen, J. M. Diederik
name: Bigiel, Frank
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Supernovae (SNe) dominate the energy and momentum budget of stellar feedback, but the efficiency with which they couple to the interstellar medium (ISM) depends strongly on how effectively early, pre-SN feedback clears dense gas from star-forming regions. There are observational constraints on the magnitudes and timescales of early stellar feedback in low ISM pressure environments, yet no such constraints exist for more cosmologically typical high ISM pressure environments. In this paper, we determine the mechanisms dominating the expansion of HII regions as a function of size-scale and evolutionary time within the high-pressure ($P/k_\rm{B}$~$10^{7-8}$K cm$^{-3}$) environment in the inner 100pc of the Milky Way. We calculate the thermal pressure from the warm ionised ($P_\rm{HII}$; 10$^{4}$K) gas, direct radiation pressure ($P_\rm{dir}$), and dust processed radiation pressure ($P_\rm{IR}$). We find that (1) $P_\rm{dir}$ dominates the expansion on small scales and at early times (0.01-0.1pc; $0.1$pc; $>1$Myr); (3) during the first ~1Myr of growth, but not thereafter, either $P_{\rm IR}$ or stellar wind pressure likely make a comparable contribution. Despite the high confining pressure of the environment, natal star-forming gas is efficiently cleared to radii of several pc within ~2Myr, i.e. before the first SNe explode. This `pre-processing' means that subsequent SNe will explode into low density gas, so their energy and momentum will efficiently couple to the ISM. We find the HII regions expand to a radius of 3pc, at which point they have internal pressures equal with the surrounding external pressure. A comparison with HII regions in lower pressure environments shows that the maximum size of all HII regions is set by pressure equilibrium with the ambient ISM.
description: 20+1 pages, 8 figures, 6 tables. A machine-readable version of Table A1 is available online. Accepted for publication in MNRAS
Magnetic field stabilization for high-accuracy mass measurements on exotic nuclides
Creators: name: Marie-Jeanne, M.
name: Alonso, J.
name: Blaum, K.
name: Djekic, S.
name: Dworschak, M.
name: Hager, U.
name: Herlert, A.
name: Nagy, Sz.
name: Savreux, R.
name: Schweikhard, L.
name: Stahl, S.
name: Yazidjian, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The magnetic-field stability of a mass spectrometer plays a crucial role in precision mass measurements. In the case of mass determination of short-lived nuclides with a Penning trap, major causes of instabilities are temperature fluctuations in the vicinity of the trap and pressure fluctuations in the liquid helium cryostat of the superconducting magnet. Thus systems for the temperature and pressure stabilization of the Penning trap mass spectrometer ISOLTRAP at the ISOLDE facility at CERN have been installed. A reduction of the fluctuations by at least one order of magnitude downto dT=+/-5mK and dp=+/-50mtorr has been achieved, which corresponds to a relative frequency change of 2.7x10^{-9} and 1.5x10^{-10}, respectively. With this stabilization the frequency determination with the Penning trap only shows a linear temporal drift over several hours on the 10 ppb level due to the finite resistance of the superconducting magnet coils.
description: 23 pages, 13 figures
Preperiodicity and systematic extraction of periodic orbits of the quadratic map
Creators: name: Gallas, Jason A. C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Iteration of the quadratic map produces sequences of polynomials whose degrees {\sl explode} as the orbital period grows more and more. The polynomial mixing all 335 period-12 orbits has degree $4020$, while for the $52,377$ period-20 orbits the degree rises already to $1,047,540$. Here, we show how to use preperiodic points to systematically extract exact equations of motion, one by one, with no need for iteration. Exact orbital equations provide valuable insight about the arithmetic structure and nesting properties of towers of algebraic numbers which define orbital points and bifurcation cascades of the map.
description: 13 pages, no figures, to appear in International Journal of Modern Physics C (World Scientific)
New Model of Higher-Spin Particle
Creators: name: Fedoruk, Sergey
name: Ivanov, Evgeny
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We elaborate on a new model of the higher-spin (HS) particle which makes manifest the classical equivalence of the HS particle of the unfolded formulation and the HS particle model with a bosonic counterpart of supersymmetry. Both these models emerge as two different gauges of the new master system. Physical states of the master model are massless HS multiplets described by complex HS fields which carry an extra U(1) charge q. The latter fully characterizes the given multiplet by fixing the minimal helicity as q/2. We construct the twistorial formulation of the master model and discuss symmetries of the new HS multiplets within its framework.
description: 13 pages, talk given by E. Ivanov at the XII International Conference on Symmetry Methods in Physics (SYMPHYS-XII), Yerevan, Armenia, July 03 - 08, 2006; to be published in the Proceedings
Nonlinear parametric model for Granger causality of time series
Creators: name: Marinazzo, Daniele
name: Pellicoro, Mario
name: Stramaglia, Sebastiano
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Machine Learning (cs.LG)
subject: Medical Physics (physics.med-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: We generalize a previously proposed approach for nonlinear Granger causality of time series, based on radial basis function. The proposed model is not constrained to be additive in variables from the two time series and can approximate any function of these variables, still being suitable to evaluate causality. Usefulness of this measure of causality is shown in a physiological example and in the study of the feed-back loop in a model of excitatory and inhibitory neurons.
description: 4 pages 5 figures
Οι οικονομικοτεχνικοί λόγοι ως λόγος καταγγελίας στη σύμβαση αορίστου και ορισμένου χρόνου:
Creators: name: Καραθόδωρου, Ελπίδα Θεοδώρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Οικονομικοτεχνικοί λόγοι
Καταγγελία
Σύμβαση εργασίας
Redundancy
Dismissal
Employment contract

description: Σκοπός αυτής της διπλωματικής εργασίας είναι να εξετάσει τους οικονομικοτεχνικούς λόγους ως αιτία καταγγελία της σύμβασης εργασίας τόσο αορίστου χρόνου όσο και ορισμένου. Οι οικονομικοτεχνικοί λόγοι αποτελούν λόγω της γενικότερης οικονομικής κρίσης τον συνηθέστερο λόγο καταγγελίας της σύμβασης εργασίας από την πλευρά του εργοδότη συνεπώς το εν λόγω ζήτημα είναι πιο επίκαιρο από ποτέ. Η παρούσα εργασία αναφέρεται πρώτα στην καταγγελία της σύμβασης αορίστου χρόνου, η οποία διακρίνεται σε τακτική και έκτακτη καθώς και στην καταγγελία στην σύμβαση ορισμένου χρόνου εν γένει. Μετά από τη γενική αυτή ανάλυση εστιάζει στην τακτική καταγγελία για οικονομικοτεχνικούς λόγους και στους ελέγχους που υπόκειται αυτή, αφού πρωτίστως γίνει μία διεξοδική ανάλυση της έννοιας των οικονομικοτεχνικών λόγων. Στη συνέχεια απαντάται το ερώτημα αν δικαιολογείται η καταγγελία για οικονομικοτεχνικούς λόγους στη σύμβαση ορισμένου χρόνου. Μετά από την απάντηση στο παραπάνω ζήτημα παρατίθεται μία περιπτωσιολογία των οικονομικοτεχνικών λόγων ως σπουδαίος λόγος. Από την εν λόγω περιπτωσιολογία ιδιαίτερο ενδιαφέρον παρουσιάζει η καταγγελία των συμβάσεων εργασίας ορισμένου χρόνου στις ΔΕΚΟ. Στο τέλος επιχειρείται μία σύγκριση τόσο με το γερμανικό δίκαιο της καταγγελίας όσο και με το βρετανικό.
description: The aim of this thesis was to examine redundancy as the cause of the dismissal of an employee both in the open – end employment contract and in fixed – term employment contract. Redundancy is the main cause of dismissals mainly due to the financial crisis. Thereby this issue is topical. The present thesis firstly refers to the dismissal of an employee of an open- end employment contract in general and then to the dismissal of an employee of a fixed – term employment contract. After this an analysis of the term of redundancy follows. Then the thesis focuses on the dismissal due to redundancy and on the controls that should take place. Finally this thesis examines if it is possible for the employer to dismiss the employee in a fixed – term employment contract and presents a number of cases that have been characterized as redundancy in fixed – term contracts the most important of which are dismissals of employees in government –owned corporations. In the end a comparison takes place between Greek and German law of dismissal on one hand and Greek and British law of dismissal on the other hand.
The ultraluminous X-ray source bubble in NGC 5585
Creators: name: Soria, Roberto
name: Pakull, Manfred
name: Motch, Christian
name: Miller-Jones, James
name: Schwope, Axel
name: Urquhart, Ryan
name: Ryan, Matthew
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Some ultraluminous X-ray sources (ULXs) are surrounded by collisionally ionized bubbles, larger and more energetic than supernova remnants: they are evidence of the powerful outflows associated with super-Eddington X-ray sources. We illustrate the most recent addition to this class: a huge (350 pc x 220 pc in diameter) bubble around a ULX in NGC 5585. We modelled the X-ray properties of the ULX (a broadened-disc source with L_X ~ 2-4 x 10^{39} erg/s) from Chandra and XMM-Newton, and identified its likely optical counterpart in Hubble Space Telescope images. We used the Large Binocular Telescope to study the optical emission from the ionized bubble. We show that the line emission spectrum is indicative of collisional ionization. We refine the method for inferring the shock velocity from the width of the optical lines. We derive an average shock velocity ~125 km/s, which corresponds to a dynamical age of ~600,000 years for the bubble, and an average mechanical power P_w ~ 10^{40} erg/s; thus, the mechanical power is a few times higher than the current photon luminosity. With Very Large Array observations, we discovered and resolved a powerful radio bubble with the same size as the optical bubble, and a 1.4-GHz luminosity ~10^{35} erg/s, at the upper end of the luminosity range for this type of source. We explain why ULX bubbles tend to become more radio luminous as they expand while radio supernova remnants tend to fade.
description: Accepted by MNRAS on 2020 Dec 4. Nineteen pages, 7.9 MB
Alterations of the mitochondrial proteome caused by the absence of mitochondrial DNA: A proteomic view
Creators: name: Chevallet, Mireille
name: Lescuyer, Pierre
name: Diemer, Hélène
name: van Dorsselaer, Alain
name: Leize-Wagner, Emmanuelle
name: Rabilloud, Thierry
Publisher: name: arXiv
Year: 2006
Subjects: subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: The proper functioning of mitochondria requires that both the mitochondrial and the nuclear genome are functional. To investigate the importance of the mitochondrial genome, which encodes only 13 subunits of the respiratory complexes, the mitochondrial rRNAs and a few tRNAs, we performed a comparative study on the 143B cell line and on its Rho-0 counterpart, i.e., devoid of mitochondrial DNA. Quantitative differences were found, of course in the respiratory complexes subunits, but also in the mitochondrial translation apparatus, mainly mitochondrial ribosomal proteins, and in the ion and protein import system, i.e., including membrane proteins. Various mitochondrial metabolic processes were also altered, especially electron transfer proteins and some dehydrogenases, but quite often on a few proteins for each pathway. This study also showed variations in some hypothetical or poorly characterized proteins, suggesting a mitochondrial localization for these proteins. Examples include a stomatin-like protein and a protein sharing homologies with bacterial proteins implicated in tyrosine catabolism. Proteins involved in apoptosis control are also found modulated in Rho-0 mitochondria.
description: website publisher: http://www3.interscience.wiley.com/
Molecular chaperones: The modular evolution of cellular networks
Creators: name: Korcsmaros, Tamas
name: Kovacs, Istvan A.
name: Szalay, Mate S.
name: Csermely, Peter
Publisher: name: arXiv
Year: 2007
Subjects: subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: Molecular chaperones play a prominent role in signaling and transcriptional regulatory networks of the cell. Recent advances uncovered that chaperones act as genetic buffers stabilizing the phenotype of various cells and organisms and may serve as potential regulators of evolvability. Chaperones have weak links, connect hubs, are in the overlaps of network modules and may uncouple these modules during stress, which gives an additional protection for the cell at the network-level. Moreover, after stress chaperones are essential to re-build inter-modular contacts by their low affinity sampling of the potential interaction partners in different modules. This opens the way to the chaperone-regulated modular evolution of cellular networks, and helps us to design novel therapeutic and anti-aging strategies.
description: 7 pages, 3 tables, 3 figures
Statistical physics of complex information dynamics
Creators: name: Ghavasieh, Arsham
name: Nicolini, Carlo
name: De Domenico, Manlio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The constituents of a complex system exchange information to function properly. Their signalling dynamics often leads to the appearance of emergent phenomena, such as phase transitions and collective behaviors. While information exchange has been widely modeled by means of distinct spreading processes -- such as continuous-time diffusion, random walks, synchronization and consensus -- on top of complex networks, a unified and physically-grounded framework to study information dynamics and gain insights about the macroscopic effects of microscopic interactions, is still eluding us. In this article, we present this framework in terms of a statistical field theory of information dynamics, unifying a range of dynamical processes governing the evolution of information on top of static or time varying structures. We show that information operators form a meaningful statistical ensemble and their superposition defines a density matrix that can be used for the analysis of complex dynamics. As a direct application, we show that the von Neumann entropy of the ensemble can be a measure of the functional diversity of complex systems, defined in terms of the functional differentiation of higher-order interactions among their components. Our results suggest that modularity and hierarchy, two key features of empirical complex systems -- from the human brain to social and urban networks -- play a key role to guarantee functional diversity and, consequently, are favored.
description: 7 pages, 3 figures
Valorisation of Human Organic Waste for Sustainable Domestic Biogas and Fertilizer Synthesis
Creators: name: Yauo, Unaro
name: Betasolo, Mirzi
Publisher: name: Zenodo
Year: 2024

description: Thesis accepted November of 2021.  Hardcopy is available at the School of Civil Engineering, Postgraduate School, and Library of the Papua New Guinea University of Technology
Ανάπτυξη οπτικοακουστικού υλικού και πολυμεσικής εφαρμογής για την υποστήριξη της διδασκαλίας μεταπτυχιακών μαθημάτων με αντικείμενο τις τεχνολογίες του ήχου
Creators: name: Ζυμπερδίκα, Αντιγόνη Φωτίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Τεχνολογίες ήχου
Πολυμεσική εφαρμογή
Υποστήριξη διδασκαλίας
Sound technologies
Multimedia production
ICT

description: Η ραγδαία ανάπτυξη των τεχνολογιών πληροφορικής και επικοινωνιών τις τελευταίες δεκαετίες δε θα μπορούσε να αφήσει ανεπηρέαστο τον χώρο της εκπαίδευσης. Ήδη από τη δεκαετία του 1980 με την εξάπλωση των προσωπικών υπολογιστών, άρχισαν να διερευνώνται τρόποι εφαρμογής των τεχνολογικών επιτευγμάτων στην εκπαιδευτική διαδικασία. Στις μέρες μας, όχι μόνο τείνουν να γίνουν αναπόσπαστο κομμάτι του παραδοσιακού τρόπου διδασκαλίας, αλλά σε πολλές περιπτώσεις τον έχουν ήδη αντικαταστήσει. Η εκπαίδευση από απόσταση ως αυτόνομη διδακτική μέθοδος εξαπλώνεται συνεχώς. Η πρόσωπο με πρόσωπο διδασκαλία δεν έχει άλλη επιλογή από το να προσαρμοστεί στις επιταγές της νέας εποχής, ενσωματώνοντας στη διαδικασία της όποιο τεχνολογικό επίτευγμα φαίνεται ικανό να τη διευκολύνει. Ειδικότερα το εκπαιδευτικό πεδίο των τεχνολογιών ήχου που προσεγγίζεται στην παρούσα εργασία, λόγω της φύσης του αντικειμένου του, μοιάζει να έχει μεγαλύτερη ανάγκη υποστήριξης από σύγχρονα εκπαιδευτικά μέσα. Ο Albert Einstein είχε πει κάποτε: «Ό,τι δε μπορώ να το κάνω εικόνα, δε μπορώ να το καταλάβω». Γίνεται εύκολα αντιληπτό πόσο πιο αποτελεσματική και ευχάριστη θα ήταν η διαδικασία της μάθησης αν επιχειρούσαμε να οπτικοποιήσουμε μέρος της θεωρίας του ήχου συνοδευόμενη από σχετικά ηχητικά παραδείγματα με τη μορφή εικόνας.
description: The following writing summarizes the development of a multimedia production in the field of sound technologies. It is divided in five sections. The first section presents the theoretical background of technological applications in education and alternative types of it, such as distance learning. The second part specifies the aims of the task, the target group and the functional requirements. The third part refers the software which was used in order to produce the development. The fourth part analyses the whole procedure of the application’s production. It describes analytical all the decisions and actions that took place during the pre-production, production and post-production steps. Finally, it is attempted a total evaluation of the application’s usability. The aim was to design an educational multimedia production which would be capable to support the process of teaching sound technologies to postgraduate students. It is developed by searching and producing the raw material, editing all of this and finally producing the ultimate application. The final product contains 6 webinars with total duration of almost 60 minutes, 6 presentations and 6 evaluation tests.
description: Σε συνεργασία με το τμήμα Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
Effective models of a semi-quark gluon plasma
Creators: name: Hidaka, Yoshimasa
name: Pisarski, Robert D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In the deconfined regime of a non-Abelian gauge theory at nonzero temperature, previously it was argued that if a (gauge invariant) source is added to generate nonzero holonomy, that this source must be linear for small holonomy. The simplest example of this is the second Bernoulli polynomial. However, then there is a conundrum in computing the free energy to $\sim g^3$ in the coupling constant $g$, as part of the free energy is discontinuous as the holonomy vanishes. In this paper we investigate two ways of generating the second Bernoulli polynomial dynamically: as a mass derivative of an auxiliary field, and from two dimensional ghosts embedded isotropically in four dimensions. Computing the holonomous hard thermal loop (HHTL) in the gluon self-energy, we find that the limit of small holonomy is only well behaved for two dimensional ghosts, with a free energy which to $\sim g^3$ is continuous as the holonomy vanishes.
description: 33 pages, 1 figure
Tearing instability in relativistic magnetically dominated plasmas
Creators: name: Komissarov, S. S.
name: Barkov, M.
name: Lyutikov, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Many astrophysical sources of high energy emission, such as black hole magnetospheres, superstrongly magnetized neutron stars (magnetars), and probably relativistic jets in Active Galactic Nuclei and Gamma Ray Bursts involve relativistically magnetically dominated plasma. In such plasma the energy density of magnetic field greatly exceeds the thermal and the rest mass energy density of particles. Therefore the magnetic field is the main reservoir of energy and its dissipation may power the bursting emission from these sources, in close analogy to Solar flares. One of the principal dissipative instabilities that may lead to release of magnetic energy is the tearing instability. In this paper we study, both analytically and numerically, the development of tearing instability in relativistically magnetically-dominated plasma using the framework of resistive magnetodynamics. We confirm and elucidate the previously obtained result on the growth rate of the tearing mode: the shortest growth time is the same as in the case of classical non-relativistic MHD, namely $τ=\sqrt{τ_a τ_d}$ where $τ_a$ is the \Alfven crossing time and $τ_d$ is the resistive time of a current layer.
description: Submitted to MNRAS, few typos corrected
The Massive M31 Cluster G1: Detailed Chemical Abundances from Integrated Light Spectroscopy
Creators: name: Sakari, Charli M.
name: Shetrone, Matthew D.
name: McWilliam, Andrew
name: Wallerstein, George
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: G1, also known as Mayall II, is one of the most massive star clusters in M31. Its mass, ellipticity, and location in the outer halo make it a compelling candidate for a former nuclear star cluster. This paper presents an integrated light abundance analysis of G1, based on a moderately high-resolution (R=15,000) spectrum obtained with the High Resolution Spectrograph on the Hobby-Eberly Telescope in 2007 and 2008. To independently determine the metallicity, a moderate resolution (R~4,000) spectrum of the calcium-II triplet lines in the near-infrared was also obtained with the Astrophysical Research Consortium's 3.5-m telescope at Apache Point Observatory. From the high-resolution spectrum, G1 is found to be a moderately metal-poor cluster, with [Fe/H]=-0.98+/-0.05. G1 also shows signs of alpha-enhancement (based on Mg, Ca, and Ti) and lacks the s-process enhancements seen in dwarf galaxies (based on comparisons of Y, Ba, and Eu), indicating that it originated in a fairly massive galaxy. Intriguingly, G1 also exhibits signs of Na and Al enhancement, a unique signature of GCs -- this suggests that G1's formation is intimately connected with GC formation. G1's high [Na/Fe] also extends previous trends with cluster velocity dispersion to an even higher mass regime, implying that higher mass clusters are more able to retain Na-enhanced ejecta. The effects of intracluster abundance spreads are discussed in a subsequent paper. Ultimately, G1's chemical properties are found to resemble other M31 GCs, though it also shares some similarities with extragalactic nuclear star clusters.
description: Accepted for publication in MNRAS
Κοινωνία και τελετουργία: η περίπτωση της λατρείας τής Ίσιδας κατά τη διάρκεια των ελληνορωμαϊκών χρόνων
Creators: name: Σηφάκης, Ιάκωβος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Κοινωνία
Τελετουργία
Πολιτισμός
Society
Ritual
Civilization

description: Η ανάδυση της τάξης στις δομές πολιτισμού. Η πορεία της ανθρωπότητας από το χάος στις εύτακτες δομές. Η στερέωση πολιτιστικών δομών και η εξέλιξη ηθικών συστημάτων. Τελετουργίες διάβασης: ο μετασχηματισμός τού υποκειμένου. Γνωσιακές προσεγγίσεις. Δυναμική, αμφίπλευρη και αμφοτερόσημη αλληλεπίδραση ατόμου – ατόμου, ατόμου – κοινωνίας, κοινωνίας – τελετουργίας. Κοινωνικοί σχηματισμοί. Κοινωνική κανονιστικότητα. Συμβολική και αλληγορική έκφραση και ερμηνεία. Συνεργατικές δομές και κοινωνική συνοχή. Εφαρμογή τής θεωρητικής προσέγγισης στην ελληνιστική εποχή. Χαρακτηριστικά τής εποχής και συναλληλία με το σήμερα. Η εξέλιξη της λατρείας τής Ίσιδας. Πλοιαφέσια και μυστήρια της Ίσιδας.
description: The rise of order in the structures of civilization. Rites of passage. Cognitive approach. Reaction between individuals, society and ritual. Social education through ritual. Cohesion and interpretations. The case of Isis’ cult during the Hellenistic era. Characteristics of adoration during the Hellenistic era.
Infrared behavior of gluon and ghost propagators from asymmetric lattices
Creators: name: Cucchieri, Attilio
name: Mendes, Tereza
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present a numerical study of the lattice Landau gluon and ghost propagators in three-dimensional pure SU(2) gauge theory. Data have been obtained using asymmetric lattices (V = 20^2 X 40, 20^2 X 60, 8^2 X 64, 8^2 X 140, 12^2 X 140 and 16^2 X 140) for the lattice coupling beta = 3.4, in the scaling region. We find that the gluon (respectively ghost) propagator is suppressed (respec. enhanced) at small momenta in the limit of large lattice volume V. By comparing these results with data obtained using symmetric lattices (V = 60^3 and 140^3), we find that both propagators suffer from systematic effects in the infrared region (p \lesssim 650 MeV). In particular, the gluon (respec. ghost) propagator is less IR-suppressed (respec. enhanced) than in the symmetric case. We discuss possible implications of the use of asymmetric lattices.
description: 6 pages, 6 figures and 3 tables; included some results on Gribov-copy effects; modified the introduction
Η ανάκτηση των παράνομων κρατικών ενισχύσεων:
Creators: name: Βοϊτσίδου, Αναστασία Μόσχου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Κρατική ενίσχυση
Επιτροπή
Ανάκτηση
State aid
Commission
Recovery

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη του πάντα επίκαιρου ζητήματος της ανάκτησης των παράνομων κρατικών ενισχύσεων. Μετά την εισαγωγική, συνοπτική παρουσίαση των λειτουργιών των κρατικών ενισχύσεων, στο πρώτο μέρος της εργασίας προχωρήσαμε στην εννοιολογική προσέγγιση και καταγραφή των τύπων εμφάνισης των τελευταίων, καθώς και στην ανάλυση του διαφορετικού τρόπου αντιμετώπισης των παράνομων ενισχύσεων, ανάλογα με την υφιστάμενη κάθε φορά μορφή της παρανομίας, ζήτημα που επίσης αναλύθηκε στο συγκεκριμένο κεφάλαιο. Επιπρόσθετα, στο δεύτερο μέρος της εργασίας προσεγγίσαμε αναλυτικά το ρόλο της Επιτροπής στη διαδικασία ανάκτησης, με την παρουσίαση των αρμοδιοτήτων της, του μηχανισμού ελέγχου των ενισχύσεων που ακολουθεί, των μορφών των αποφάσεων που λαμβάνει σχετικώς και των περιπτώσεων, κατά τις οποίες υφίσταται δυνατότητα του οργάνου της Ευρωπαϊκής Ένωσης να μη διατάξει την ανάκτηση παράνομης ενίσχυσης που χορηγήθηκε από κράτος μέλος. Επιπλέον, στο τρίτο μέρος παρουσιάζονται ο ρόλος των εθνικών διοικητικών αρχών που είχαν προχωρήσει στη χορήγηση της ενίσχυσης στη διαδικασία της ανάκτησής της κατόπιν της αποφάσεως της Επιτροπής και η εξωσυμβατική ευθύνη του κράτους για την χορήγηση των παράνομων οικονομικών πλεονεκτημάτων.
description: The aim of the present thesis was the study of the always current issue of recovery of illegal state aids. After the introductory, summary presentation of the functions of state aids, in the first part of the thesis we proceeded to the conceptual approach and the registration of the types of their appearance and to the analysis of the different way of treatment of illegal state aids, according to the type of illegality which exists. This issue was also analysed in this specific chapter. Furthermore, in the second part of the thesis, we approached the role of Commission in the process of the recovery analytically, as we presented its jurisdiction, the control mechanisms of the state aids which the Commission follows, the types of relative decisions which are taken by the body and the cases where the body of the European Union has the possibility not to order the recovery of the illegal state aid which was provided by the member State. Moreover, in the third part the role of the national administrative authorities who had granted the state aid after the decision of the Commission and member state liability for providing the illegal financial advantages are presented.
Deviations from the Infrared-Radio Correlation in Massive, Ultra-compact Starburst Galaxies
Creators: name: Petter, Grayson C.
name: Kepley, Amanda A.
name: Hickox, Ryan C.
name: Rudnick, Gregory H.
name: Tremonti, Christy A.
name: Diamond-Stanic, Aleksandar M.
name: Geach, James E.
name: Coil, Alison L.
name: Sell, Paul H.
name: Moustakas, John
name: Rupke, David S. N.
name: Perrotta, Serena
name: Whalen, Kelly E.
name: Davis, Julie D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Feedback through energetic outflows has emerged as a key physical process responsible for transforming star-forming galaxies into the quiescent systems observed in the local universe. To explore this process, this paper focuses on a sample of massive and compact merger remnant galaxies hosting high-velocity gaseous outflows ($|v| \gtrsim 10^{3}$ km s$^{-1}$), found at intermediate redshift ($z \sim 0.6$). From their mid-infrared emission and compact morphologies, these galaxies are estimated to have exceptionally large star formation rate (SFR) surface densities ($Σ_{SFR} \sim 10^{3}$ $\mathrm{M_{\odot}}$ yr$^{-1}$ kpc$^{-2}$), approaching the Eddington limit for radiation pressure on dust grains. This suggests that star formation feedback may be driving the observed outflows. However, these SFR estimates suffer from significant uncertainties. We therefore sought an independent tracer of star formation to probe the compact starburst activity in these systems. In this paper, we present SFR estimates calculated using 1.5 GHz continuum Jansky Very Large Array observations for 19 of these galaxies. We also present updated infrared (IR) SFRs calculated from WISE survey data. We estimate SFRs from the IR to be larger than those from the radio for 16 out of 19 galaxies by a median factor of 2.5. We find that this deviation is maximized for the most compact galaxies hosting the youngest stellar populations, suggesting that compact starbursts deviate from the IR-radio correlation. We suggest that this deviation stems either from free-free absorption of synchrotron emission, a difference in the timescale over which each indicator traces star formation, or exceptionally hot IR-emitting dust in these ultra-dense galaxies.
description: 15 pages, 9 figures, 2 tables; accepted for publication in ApJ
Η εκπαιδευτική πολιτική στον Πλάτωνα:
Creators: name: Παπανδρίτσα, 'Αρτεμη Θωμά
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Εκπαίδευση
Πολιτική Κοινωνία
Education
Policy
Society

description: Σκοπός της παρούσας διατριβής ήταν η μελέτη της εκπαιδευτικής διαδικασίας συναρτήσει της πολιτικής της διάστασης, όπως την οραματίστηκε και την αποτύπωσε στα έργα του ο Πλάτωνας, θεωρώντας την « ίαση» για όλα τα ζητήματα που σχετίζονται με την πολιτεία, καθώς ο γνωστότερος μαθητής του Σωκράτη συνέδεε απαρεγκλίτως την εκπαίδευση με την πολιτική αντιμετωπίζοντας τον άνθρωπο ως αναπόσπαστο τμήμα της κοινωνίας. Για το λόγο τούτο μελετήθηκαν τα έργα του Πλάτωνος : Πρωταγόρας , Μένων, Πολιτεία, Νόμοι με τη χρονολογική σειρά που ο ίδιος τα συνέθεσε κάποιο διάστημα της ζωής του. Εν συνεχεία, παρουσιάσαμε βραχυλογικά τις απόψεις του Πλάτωνα σε κάθε έργο του, που εγκύπτουν στο θέμα της εκπαιδευτικής πολιτικής, προσεγγίζοντας στον Πρωταγόρα και στο Μένωνα την αρετή, διαρθρώνοντας την ιδανική Πολιτεία σε τρεις τάξεις, δίνοντας έμφαση στη δικαιοσύνη των Νόμων και στο τελευταίο κεφάλαιο σκιαγραφήσαμε συμπερασματικά την Εκπαίδευση του Πλάτωνος υπό μία υποκειμενική και γενικότερη εποπτεία και εντέλει προέκυψαν τα απαραίτητα συμπεράσματα, από τα οποία διαμηνύεται πως η ολόπλευρη και σφαιρική παιδεία του Πλάτωνος και η πολιτική είναι έννοιες στενά συνυφασμένες και πως καμία από τις δύο δεν μπορεί να αυθυπάρξει, ώστε να υφίσταται αρμονία τόσο σε ατομικό όσο και σε συλλογικό επίπεδο.
description: The purpose of the present discourse has been the study of the educational process in relation to its political dimension, as it was dreamt of and recorded in Plato’s works. Plato considered the educational process to be the remedy for every kind of matter in connection with the city- state, as Socrates’s most well- known student unswervingly associated education with politics facing the man as an indispensable part of society. That was the reason why Plato’s works were studied, Protagoras, Menon, Politeia, Nomoi, in the chronological order that he himself composed them at some time in his life. Then, we briefly presented Plato’s views in all of his works, which address the matter of his educational policy, by approaching the quality of virtue in Protagoras and Menon, by structuring the ideal “city- state” into three classes and by laying emphasis on the justice of laws. In the last chapter, we delineated by inference Plato’s Education from a more subjective and general perspective. Conclusively, there emerged the necessary conclusions, which notify that Plato’s spherical education and policy comprise closely incident concepts and that neither of them can self- exist in order for harmony to exist in an individual as well as in a collective level.
Tailoring the anomalous Hall effect of SrRuO$_3$ thin films by strain: a first principles study
Creators: name: Samanta, Kartik
name: Ležaić, Marjana
name: Blügel, Stefan
name: Mokrousov, Yuriy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Motivated by the recently observed unconventional Hall effect in ultra-thin films of ferromagnetic SrRuO$_3$ (SRO) we investigate the effect of strain-induced oxygen octahedral distortion in the electronic structure and anomalous Hall response of the SRO ultra-thin films by virtue of density functional theory calculations. Our findings reveal that the ferromagnetic SRO films grown on SrTiO$_3$ (in-plane strain of $-$0.47$\%$) have an orthorhombic (both tilting and rotation) distorted structure and with an increasing amount of substrate-induced compressive strain the octahedral tilting angle is found to be suppressed gradually, with SRO films grown on NdGaO$_3$ (in-plane strain of $-$1.7$\%$) stabilized in the tetragonal distorted structure (with zero tilting). Our Berry curvature calculations predict a positive value of the anomalous Hall conductivity of $+$76\,S/cm at $-$1.7$\%$ strain, whereas it is found to be negative ($-$156\,S/cm) at $-$0.47$\%$ strain. We attribute the found behavior of the anomalous Hall effect to the nodal point dynamics in the electronic structure arising in response to tailoring the oxygen octahedral distortion driven by the substrate-induced strain. We also calculate strain-mediated anomalous Hall conductivity as a function of reduced magnetization obtained by scaling down the magnitude of the exchange field inside Ru atoms finding good qualitative agreement with experimental observations, which indicates a strong impact of longitudinal thermal fluctuations of Ru spin moments on the anomalous Hall effect in this system.
description: 8 pages, 4 figures. arXiv admin note: text overlap with arXiv:2002.05393
5566.pdf
Creators: name: Serohi, Ajay
Publisher: name: figshare
Year: 2021
Subjects: subject: 150309 Logistics and Supply Chain Management
subject: FOS: Economics and business

description: This section assesses a four-tier vehicle production network comprising government, electric / gas vehicle manufacturers, retailers and customers. The goal is to understand how government sponsorship should be designated to extend the overall benefit of the entire store network. A numeric model was developed by adopting the Stackelberg hypothesis which relies on the state of defect data. The results show that some of the subsidies in the electric vehicle production network should first be allocated to electric vehicle customers. In particular in early development organizations, if subsidized spending plans are restricted, all items should be made available to purchasers of electric vehicle customers. With sponsorship spending plans increasing, there is a greater share of ordinary electric vehicle manufacturers. However, increased funding does not encourage the gradual purchase of electric vehicles, as roofs are available for electric vehicles. In future development organizations, sponsorship may not be important in promoting the popularity of electric vehicles
Formal and rigid geometry: an intuitive introduction, and some applications
Creators: name: Nicaise, Johannes
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14G22; 14D15; 14B05

description: We give an informal introduction to formal and rigid geometry over complete discrete valuation rings, and we discuss some applications in algebraic and arithmetic geometry and singularity theory, with special emphasis on recent applications to the Milnor fibration and the motivic zeta function by J. Sebag and the author.
description: Minor errors corrected. For the final version, please consult the published article
Reducing Wastage In Manufacturing Through Digitalization: An Adaptive Solution Approach For Process Efficiency
Creators: name: Dausch, Valesko
name: Beckschulte, Sebastian
name: Huebser, Louis
name: Schulze, Tobias
name: Schmitt, Robert H.
name: Kreimeyer, Matthias
Publisher: name: Hannover : publish-Ing.
Year: 2023
Subjects: subject: Digitalization
subject: Efficiency
subject: Cost-benefit analysis
subject: Adaptive approach
subject: Wastage reduction
subject: Process Mapping
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: The transformation to digital manufacturing has become increasingly critical for companies to remain competitive and achieve efficient manufacturing processes. However, manufacturing operations are often plagued by suboptimal allocation of resources, which can lead to higher costs and lower productivity. Digitalization has the potential to address these challenges by enabling real-time data monitoring, reducing quality costs, and improving product quality. Previous studies have shown that digital manufacturing can improve the efficiency of manufacturing processes and lead to productivity increases in organizations. However, despite these advantages, many digital innovation projects in manufacturing fall short of their initial ambitions, often resulting in incremental improvements to an existing manufacturing system. This is partly due to the challenges faced by manufacturing companies in quantifying the added value versus the costs of digitization technologies. Therefore, the objective of this paper is to propose an adaptive solution approach that addresses the need of aiding the decision process in selecting and assessing digital technologies to reduce wastage in manufacturing processes. The approach combines the 'Makigami' methodology, an 'Activity Diagram' (AD) modelling methodology, and a simplified 'Flow Chart', representing an aggregated view of the more detailed AD via a custom modelling schema, into one coherent framework. We further introduce the 'Methods-Misallocation-Measure' (3M-Graph) framework, which maps methods onto elements of wastage and misallocation, and subsequently assigns potential countermeasures. This tripartite mapping facilitates the identification of wastage during process analysis, the allocation of digital optimization measures and eases the assessment of cost effectiveness. The proposed approach aims to improve process efficiency and reduce wastage in manufacturing through digitalization. We conduct a case study of the approach and its application to an industrial assembly station, comparing the initial and then optimized processes. Future work includes the identification of further improvements and extending the framework by methodologies for estimating cost effectiveness more concisely.