cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Προστασία των προσωπικών δεδομένων των εργαζομένων
Creators: name: Σιώμου, Χρυσάνθη Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Προσωπικά δεδομένα
Ηλεκτρονική παρακολούθηση
Επιτήρηση στο χώρο εργασίας
Δικαιώματα εργαζομένων
Ιδιωτικότητα στον εργασιακό χώρο
Personal data
Electronic monitoring
Workplace surveillance
Employees rights
Privacy
Workplace privacy

description: Στην παρούσα εργασία τίθεται το θέμα της επιτήρησης των εργαζομένων στο χώρο εργασίας και κυρίως όσον αφορά τη χρήση του Διαδικτύου και του ηλεκτρονικού ταχυδρομείου. Εξετάζεται εάν και μέχρι ποιο σημείο είναι επιτρεπτός αυτός ο έλεγχος που πολύ συχνά διεισδύει στη προσωπική ζωή του εργαζομένου παραβιάζοντας την ιδιωτικότητα του, καθώς και πως μπορεί ο ίδιος να προστατευθεί. Επίσης γίνεται αναφορά στον τρόπο που αντιμετωπίζεται το ζήτημα σε ορισμένες χώρες της Ευρωπαϊκής Ενωσης, εστιάζοντας βέβαια στο νομοθετικό πλαίσιο της Ελλάδας.
description: This thesis is about employees' personal data protection at the workplace with more emphasis on the surveillance of the use of internet and electronic mail. It is well known that many times the employer's control invades employees' privacy and rights, so it is examined whether this control is acceptable and legal and how someone can protect himself. The second and the third part of the thesis refer to the relevant European countries' legislation and especially to the Greek one.
Anisotropic superconductivity and Fermi surface reconstruction in the spin-vortex antiferromagnetic superconductor CaK(Fe$_{0.95}$Ni$_{0.05}$)$_4$As$_4$
Creators: name: Llorens, José Benito
name: Herrera, Edwin
name: Barrena, Víctor
name: Wu, Beilun
name: Heinsdorf, Niclas
name: Borisov, Vladislav
name: Valentí, Roser
name: Meier, William R.
name: Bud'ko, Sergey
name: Canfield, Paul C.
name: Guillamón, Isabel
name: Suderow, Hermann
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: High critical temperature superconductivity often occurs in systems where an antiferromagnetic order is brought near $T=0K$ by slightly modifying pressure or doping. CaKFe$_4$As$_4$ is a superconducting, stoichiometric iron pnictide compound showing optimal superconducting critical temperature with $T_c$ as large as $38$ K. Doping with Ni induces a decrease in $T_c$ and the onset of spin-vortex antiferromagnetic order, which consists of spins pointing inwards to or outwards from alternating As sites on the diagonals of the in-plane square Fe lattice. Here we study the band structure of CaK(Fe$_{0.95}$Ni$_{0.05}$)$_4$As$_4$ (T$_c$ = 10 K, T$_N$ = 50 K) using quasiparticle interference with a Scanning Tunneling Microscope (STM) and show that the spin-vortex order induces a Fermi surface reconstruction and a fourfold superconducting gap anisotropy.
description: 5 pages, 4 figures, Supplemental Material on request
Auslander Bounds and Homological Conjectures
Creators: name: Wei, Jiaqun
Publisher: name: arXiv
Year: 2008
Subjects: subject: Rings and Algebras (math.RA)
subject: Commutative Algebra (math.AC)
subject: K-Theory and Homology (math.KT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 16E10, 16E30, 16E65

description: Inspired by recent works on rings satisfying Auslander's conjecture, we study invariants, which we call Auslander bounds, and prove that they have strong relations to some homological conjectures.
description: Comments are invited
Properties and solubility of chrome in iron alumina phosphate glasses containing high level nuclear waste
Creators: name: Huang, Wenhai
name: Day, Delbert E.
name: Ray, Chandra S.
name: Kim, Cheol-Woon
name: Reis, Signo T. D.
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2004
Subjects: subject: 660

description: Chemical durability, glass formation tendency, and other properties of iron alumina phosphate glasses containing 70 wt% of a simulated high level nuclear waste (HLW), doped with different amounts of Cr2O3, have been investigated. All of the iron alumina phosphate glasses had an outstanding chemical durability as measured by their small dissolution rate (1 ∙ 10^-9 g/(cm2 ∙ min)) in deionized water at 90 °C for 128 d, their low normalized mass release as determined by the Product Consistency Test (PCT) and a barely measurable corrosion rate of < 0.1 g/(m2 ∙ d) after 7 d at 200 °C by the Vapor Hydration Test (VHT). The solubility limit for Cr2O3 in the iron phosphate melts was estimated at 4.1 wt%, but all of the as-annealed melts contained a few percent of crystalline Cr2O3 that had no apparent effect on the chemical durability. The chemical durability was unchanged after deliberate crystallization, 48 h at 650 °C. These iron phosphate waste forms, with a waste loading of at least 70 wt%, can be readily melted in commercial refractory crucibles at 1250°C for 2 to 4 h, are resistant to crystallization, meet all current US Department of Energy requirements for chemical durability, and have a solubility limit for Cr2O3 which is at least three times larger than that for borosilicate glasses.
The Impact of Spatial Design on Perceptions of Visibility: A Case Study of a Neoliberal Library
Creators: name: Nabayan, Jaida
Publisher: name: University of Chicago
Year: 2020
Subjects: subject: University of Chicago
subject: library
subject: Joe and Rika Mansueto Library
subject: spatial design
subject: case study

description: In 2008, the University of Chicago began the construction of the Joe and Rika Mansueto Library, commonly referred to as Mansueto Library. One of the biggest reasons to construct this library was to store the growing book collection at the University of Chicago (Moser, 2019). After three years of construction and design processing, Mansueto Library debuted as a study space and library collection storage space attached to the main campus library, The Joseph Regenstein Library. Due to its unique design and utility, Mansueto Library has become a site of attraction for touring students, visitors, and global leaders.
Η διδασκαλία της τοπικής ιστορίας στην πρωτοβάθμια εκπαίδευση: θεωρητική και εμπειρική προσέγγιση
Creators: name: Ιερεμιάδου, Φωτεινή Χαραλάμπους
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Τοπική ιστορία
Ποιοτική ανάλυση περιεχομένου
Μικροϊστορία
Μακροϊστορία
Μέθοδος project
Local history
Qualitative content analysis
Microhistory
Project

description: Αντικείμενο της εργασίας είναι η διδασκαλία της τοπικής ιστορίας στην πρωτοβάθμια εκπαίδευση με την εφαρμογή σχετικών προγραμμάτων και ειδικότερα η διερεύνηση των απόψεων των δασκάλων για την εφαρμογή προγραμμάτων τοπικής ιστορίας στο δημοτικό σχολείο
description: This essay is about the teaching of local history in primary education and the implementation of local history projects. Through the use of qualitative content analysis, we make the effort of illustrating primary school teachers point of view about local history and relative projects which are implemented in greek primary schools
Kampling, Rainer (hrsg.): Dabru emet - redet Wahrheit: eine jüdische Herausforderung zum Dialog mit den Christen
Creators: name: Durst, Stefan
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 54 Nr. 4 (2005): Ökumenische Rundschau, Band 54, Heft 4
Search for Invisibly Decaying Higgs Bosons with Large Decay Width Using the OPAL Detector at LEP
Creators: name: The OPAL Collaboration
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: This paper describes a topological search for an invisibly decaying Higgs boson,H, produced via the Bjorken process (e+e- -> HZ). The analysis is based on data recorded using the OPAL detector at LEP at centre-of-mass energies from 183 to 209 GeV corresponding to a total integrated luminosity of 629pb-1. In the analysis only hadronic decays of the Z boson are considered. A scan over Higgs boson masses from 1 to 120 GeV and decay widths from 1 to 3000 GeV revealed no indication for a signal in the data. From a likelihood ratio of expected signal and Standard Model background we determine upper limits on cross-section times branching ratio to an invisible final state. For moderate Higgs boson decay widths, these range from about 0.07pb Mh = 60GeV) to 0.57pb (Mh = 114GeV). For decay widths above 200GeV the upper limits are of the order of 0.15pb. The results can be interpreted in general scenarios predicting a large invisible decay width of the Higgs boson. As an example we interpret the results in the so-called stealthy Higgs scenario. The limits from this analysis exclude a large part of the parameter range of this scenario experimentally accessible at LEP2.
description: 30 pages, 10 figures, Submitted to Eur. Phys. J
Νομοθετικά πλαίσια περιβαλλοντικής εκπαίδευσης στην πρωτοβάθμια εκπαίδευση
Creators: name: Τζήκας, Ιωάννης Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Νομοθεσία
Περιβαλλοντική εκπαίδευση
Ιστορική αναδρομή
Πρωτοβάθμια εκπαίδευση
Legislation
Environmental education
Primary education
Historical retrospection
Environmental programs

description: Η συστηματική ένταξη της περιβαλλοντικής εκπαίδευσης στο εκπαιδευτικό σύστημα συμπορεύτηκε με τη θέσπιση συγκεκριμένων κανόνων και ρυθμίσεων. Στη συγκεκριμένη εργασία επιχειρείται η παρουσίαση της βασικής νομοθεσίας της περιβαλλοντικής εκπαίδευσης, καθώς και του πλαισίου μέσα στο οποίο αναπτύχθηκε αυτή. Αρχικά, παρουσιάζεται η ιστορική εξέλιξη της περιβαλλοντικής εκπαίδευσης μέσα από τις αποφάσεις διεθνών συναντήσεων και συσκέψεων. Ακολουθεί η παρουσίαση της νομοθεσίας σε θεματικές ενότητες και έπειτα, το θεωρητικό πλαίσιο εφαρμογής των προγραμμάτων. Η εργασία ολοκληρώνεται με μια σειρά προτάσεων για τον επαναπροσανατολισμό της περιβαλλοντικής εκπαίδευσης.
description: The systematic integration of environmental education in the educational system co-headed with the establishment of concrete rules and regulations. In the particular thesis, the presentation of basic legislation of environmental education is attempted, as well as the frame in which it was developed. Initially, the historical development of environmental education through the decisions of international meeting and deliberations is presented. What follows is the presentation of legislation in thematic units as well as the theoretical frame within which the environmental programs are applied. The thesis is completed with a line of proposals for the reorientation of environmental education.
The Roles of Astronomers in the Astronomy Education Ecosystem: A Research-Based Perspective
Creators: name: Pompea, Stephen
name: Russo, Pedro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Physics Education (physics.ed-ph)
subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: Astronomers have played many roles in their engagement with the larger astronomy education ecosystem. Their activities have served both the formal and informal education communities worldwide, with levels of involvement from the occasional participant to the full-time professional. We discuss these many diverse roles, giving background, context, and perspective on their value in encouraging and improving astronomy education. This review covers the large amounts of new research on best practices for diverse learning environments. For the formal education learning environment, we cover pre-university roles and engagement activities. This evidence-based perspective can support astronomers in contributing to the broad astronomy education ecosystem in more productive and efficient ways and in identifying new niches and approaches for developing the science capital necessary for a science literate society and for greater involvement of underrepresented groups in the science enterprise.
description: 46 pages, 4 figures
Pintar al-Aflak : Integrasi Ilmu Islam dan STEM
Creators: name: Niri, Mohammaddin Abdul
Publisher: name: figshare
Year: 2021
Subjects: Education

description: Niri, M.A. (2020). Pintar al-Aflak Integrasi Ilmu Islam dan STEM. Dewan Kosmik, Kuala Lumpur: Dewan Bahasa dan Pustaka, Bil. 10, h. 24-25, ISBN : 9770128657134.
A non inflationary model with scale invariant cosmological perturbations
Creators: name: Peter, Patrick
name: Pinho, E. J. C.
name: Pinto-Neto, Nelson
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that a contracting universe which bounces due to quantum cosmological effects and connects to the hot big-bang expansion phase, can produce an almost scale invariant spectrum of perturbations provided the perturbations are produced during an almost matter dominated era in the contraction phase. This is achieved using Bohmian solutions of the canonical Wheeler-de Witt equation, thus treating both the background and the perturbations in a fully quantum manner. We find a very slightly blue spectrum ($n_{_\mathrm{S}}-1>0$). Taking into account the spectral index constraint as well as the CMB normalization measure yields an equation of state that should be less than $ω\lesssim 8\times 10^{-4}$, implying $n_{_\mathrm{S}}-1 \sim \mathcal{O}(10^{-4})$, and that the characteristic size of the Universe at the bounce is $L_0 \sim 10^3 \ell_\mathrm{Planck}$, a region where one expects that the Wheeler-DeWitt equation should be valid without being spoiled by string or loop quantum gravity effects.
description: 9 pages, 4 figures
Fabrication of SiO2 glass fibres by thermoplastic extrusion
Creators: name: Heiber, Juliane
name: Clemens, Frank
name: Graule, Thomas
name: Hülsenberg, Dagmar
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2004
Subjects: subject: 660

description: The fabrication of silica glass fibres by thermoplastie extrusion of nanosize and micron SiO2 powders has been investigated. The powders were mixed with a binder system, compounded for 3 h at 150 °C, and finally extruded through a die with a 500 μm-diameter die land. After debinding the green fibres at 500 °C, these were sintered for 1 h at 1100°C under air to yield glassy and crack-free silica fibres with a final diameter of 400 μm. The effect of the two different particle size distributions as well as the influence of varying powder loading (between 38 and 58 vol.%) on the rheological properties of the feedstocks were analysed using capillary rheometry. The debinding and sintering behaviour was also investigated using mercury intrusion porosimetry, thermal gravimetrie analysis and dilatometry.
Προγράμματα στατιστικής ανάλυσης ελεύθερου λογισμικού
Creators: name: Χατζηπέτρου, Παναγιώτα Μυριάνθη
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Ελεύθερα λογισμικά
Στατιστική
Assistat
Ezanova
Factor analysis
Knime
Microsiris
Winidams

description: Κύριος στόχος αυτής της διπλωματικής εργασίας είναι να παρουσιάσει τα πιο διαδεδομένα ελεύθερα στατιστικά προγράμματα που κυκλοφορούν στο διαδίκτυο. Τα ελεύθερα στατιστικά προγράμματα που βρέθηκαν ήταν πολλά. Ωστόσο, μετά από εκτεταμένη έρευνα επιλέχθηκαν να μελετηθούν τα πιο εύχρηστα και φιλικά ως προς τον χρήστη λογισμικά. Ο αριθμός των στατιστικών αυτών πακέτων είναι έξι. Η διπλωματική αυτή χωρίστηκε σε δύο μέρη. Το πρώτο μέρος είναι το θεωρητικό κομμάτι, όπου παρουσιάζονται και περιγράφονται αναλυτικά και με παραδείγματα τα έξι ελεύθερα στατιστικά προγράμματα. Το δεύτερο μέρος αποτελεί μία πρακτική εφαρμογή ανάλυσης παλινδρόμησης από ένα από τα ελεύθερα στατιστικά πακέτα (Knime).
description: Main objective of this thesis is to presents the most popular free statistical programs that are on the internet. The free statistical programs that were found were many. However, after extensive research we select to study the most functional and friendly softwares. The number of these statistical analysis softwares is six.This thesis is separated in two parts. The first part is the theoretical part, where we present and describe analytically the six free statistical programs. The second part constitutes a practical application of analysis of regression with the free statistical analysis software Knime.
Transcription of a story about Indian devils
Creators: name: Parker, Verdena
name: Escamilla, Ramón
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio file VP-120510-03: Transcription of a story about Indian devils (file VP-131007-13), from 32:25 to the end of the story at 34:12.
Particle Swarm Optimization: Fundamental Study and its Application to Optimization and to Jetty Scheduling Problems
Creators: name: Sienz, Johann
name: Innocente, Mauro S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The advantages of evolutionary algorithms with respect to traditional methods have been greatly discussed in the literature. While particle swarm optimizers share such advantages, they outperform evolutionary algorithms in that they require lower computational cost and easier implementation, involving no operator design and few coefficients to be tuned. However, even marginal variations in the settings of these coefficients greatly influence the dynamics of the swarm. Since this paper does not intend to study their tuning, general-purpose settings are taken from previous studies, and virtually the same algorithm is used to optimize a variety of notably different problems. Thus, following a review of the paradigm, the algorithm is tested on a set of benchmark functions and engineering problems taken from the literature. Later, complementary lines of code are incorporated to adapt the method to combinatorial optimization as it occurs in scheduling problems, and a real case is solved using the same optimizer with the same settings. The aim is to show the flexibility and robustness of the approach, which can handle a wide variety of problems.
description: Preprint submitted to Trends in Engineering Computational Technology. arXiv admin note: text overlap with arXiv:2101.10933
The signature of the Seiberg-Witten surface
Creators: name: Malmendier, Andreas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The Seiberg-Witten family of elliptic curves defines a Jacobian rational elliptic surface $\Z$ over $\mathbb{C}\mathrm{P}^1$. We show that for the $\bar{\partial}$-operator along the fiber the logarithm of the regularized determinant $-1/2 \log \det' (\bar\partial^* \bar\partial)$ satisfies the anomaly equation of the one-loop topological string amplitude derived in Kodaira-Spencer theory. We also show that not only the determinant line bundle with the Quillen metric but also the $\bar{\partial}$-operator itself extends across the nodal fibers of $\mathrm{Z}$. The extension introduces current contributions to the curvature of the determinant line bundle at the points where the fibration develops nodal fibers. The global anomaly of the determinant line bundle then determines the signature of $\mathrm{Z}$ which equals minus the number of hypermultiplets.
description: 22 pages
NIHAO -- XXV. Convergence in the cusp-core transformation of cold dark matter haloes at high star formation thresholds
Creators: name: Dutton, Aaron A.
name: Buck, Tobias
name: Macciò, Andrea V.
name: Dixon, Keri L.
name: Blank, Marvin
name: Obreja, Aura
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use cosmological hydrodynamical galaxy formation simulations from the NIHAO project to investigate the response of cold dark matter (CDM) haloes to baryonic processes. Previous work has shown that the halo response is primarily a function of the ratio between galaxy stellar mass and total virial mass, and the density threshold above which gas is eligible to form stars, $n [{\rm cm}^{-3}]$. At low $n$ all simulations in the literature agree that dwarf galaxy haloes are cuspy, but at high $n\ge 100$ there is no consensus. We trace halo contraction in dwarf galaxies with $n\ge 100$ reported in some previous simulations to insufficient spatial resolution. Provided the adopted star formation threshold is appropriate for the resolution of the simulation, we show that the halo response is remarkably stable for $n\ge 5$, up to the highest star formation threshold that we test, $n=500$. This free parameter can be calibrated using the observed clustering of young stars. Simulations with low thresholds $n\le 1$ predict clustering that is too weak, while simulations with high star formation thresholds $n\ge 5$, are consistent with the observed clustering. Finally, we test the CDM predictions against the circular velocities of nearby dwarf galaxies. Low thresholds predict velocities that are too high, while simulations with $n\sim 10$ provide a good match to the observations. We thus conclude that the CDM model provides a good description of the structure of galaxies on kpc scales provided the effects of baryons are properly captured.
description: 15 pages, 10 figures, published in MNRAS
Induced crystallization of glass-forming melts : Part 1. Heterogeneous nucleation. Effect of noble metal microcrystals on the crystallization of calcium metaphosphate glasses
Creators: name: Guencheva, Victoria
name: Stoyanov, Emil
name: Gutzow, Ivan
name: Carl, Gunter
name: Rüssel, Christian
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2004
Subjects: subject: 660

description: The possibilities of initiating crystallization in glass-forming melts are analyzed, using experimental evidence, obtained with several model glass-forming systems. In the present Part 1 of the investigation the process of heterogeneous nucleation, catalyzed by insoluble crystallization cores is studied, using a new theoretieal thermodynamie model. The nucleation activity coefficient, Φ, of the aubstrates is described by the adhesion energy, β, at the interface crystallization core/overgrowing crystal. Lattice disregistry is accounted for as an additional correlation factor, influencing the thermodynamie work of adhesion. The crystallization of calcium metaphosphate glass-forming melts, initiated by noble metal microerystals (Ag, Au, Pd, Pt, Rh, Ru, Ir, Os), is studied by differential thermal analysis, optical and scanning electron microseopy. Ir microerystals show highest nucleation activity promoting intensive bulk crystallization in the Ca(PO3)2 systems investigated. The activity of other crystallization cores decreases in the following sequence: Ru > Rh > Os > Pt > Pd > Au > Ag. The above outlined thermodynamic theory of nucleation activity is used to correlate experimental data and to calculate activity coefficients, Φ, in dependence on the properties of the substrates employed. Under tangential stress, applied by pressure in extrusion experiments, the metal microcrystals in the glass samples are stratified in concentric rings with particle density increasing towards the sample surface. Thus a new method of formation of pre-oriented glass-ceramic materials is indicated. In Part 2 of the investigation the effect of soluble oxide additives on nucleation and crystallization in glass-forming melts is considered.
Wall thickness estimation based on modelling nonstationary heat transfer in a glass furnace
Creators: name: Vráble, Peter
name: Šimurka, Peter
name: Liška, Marek
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2004
Subjects: subject: 660

description: Furnaces in the glass industry suffer from refractory corrosion at specific positions. Knowledge of wall thickness of a furnace at the metal line is necessary information for a proper start of external cooling in order to prevent complete corrosion of refractory. An application of a noninvasive method for residual wall thickness estimation is presented in this paper. Combination of modelling and experimental surface temperature record of a nonstationary heat transfer is necessary in order to calculate the actual wall thickness. Α formula was derived for a temperature dependent effective heat transfer coefficient needed for calculation. Sensitivity analysis proved that the method is robust enough to get reliable results. The approach used was an example of reasonable exploitation of modelling in the glass industry.
Orbital Architectures of M Dwarf Systems: Building the P vs. e Diagram
Creators: name: Vrijmoet, Eliot Halley
name: Henry, Todd
name: Jao, Wei-Chun
name: Tokovinin, Andrei
name: Dieterich, Serge
name: Winters, Jennifer
name: Horch, Elliott
Publisher: name: Zenodo
Year: 2021
Subjects: Stellar systems, clusters, and associations
Binary stars
Orbits
M dwarfs
M dwarf stars
Low-mass stars

description: Comprising three out of every four stars, the M dwarfs form a unique sample that can host companions orbiting at Solar System scales and spanning a factor of 100,000 in mass. Targeting 120 M dwarf binaries within 25 parsecs, we are determining the period vs. eccentricity distribution for M dwarf stellar companions with orbital periods up to 6 years and semimajor axes up to 5 AU. This range is enabled by our combination of multiple observational methods: long-term astrometry from our RECONS program at the CTIO/SMARTS 0.9m is characterizing orbits on decades-long timescales, while our speckle interferometry survey at SOAR with HRCAM+SAM maps shorter orbits of systems identified from Gaia DR2, while also providing resolutions and masses for our long-period astrometric binaries. We will supplement these results with orbits from the literature, from both radial velocity and high-resolution imaging surveys, to ensure that our sample is rich with companions of all types orbiting within 5 AU. Initial results of this work so far suggest a notable paucity of M dwarf stellar companions with circular orbits greater than 5 years in period, showcasing the additional leverage provided by this combination of long-term astrometry and high-resolution imaging. Ultimately, when compared to the orbits of brown dwarf and planetary companions, such structures will be critical to understanding the formation mechanisms of these systems.
description: {"references": ["Bate, M. 2015, Living Together: Planets, Host Stars and Binaries, 496, 37", "Dupuy & Liu 2017, ApJS, 231, 15", "Raghavan, D., McAlister, H., Henry, T., et al. 2010, ApJS, 190, 1", "Tokovinin, A., Cantarutti, R., Tighe, R., et al 2016, PASP, 128, 125003"]}
The effect of a small bounded noise on the hyperbolicity for autonomous semilinear differential equations
Creators: name: Caraballo, Tomás
name: de Carvalho, Alexandre N.
name: Langa, José A.
name: Oliveira-Sousa, Alexandre N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37B55, 37B99, 34D09, 93D09

description: In this work we study permanence of hyperbolicity for autonomous differential equations under nonautonomous random/stochastic perturbations. For the linear case, we study robustness and existence of exponential dichotomies for nonautonomous random dynamical systems. Next, we establish a result on the persistence of hyperbolic equilibria for nonlinear differential equations. We show that for each nonautonomous random perturbation of an autonomous semilinear problem with a hyperbolic equilibrium there exists a bounded \textit{random hyperbolic solution} for the associated nonlinear nonautonomous random dynamical systems. Moreover, we show that these random hyperbolic solutions converge to the autonomous equilibrium. As an application, we consider a semilinear differential equation with a small nonautonomous multiplicative white noise, and as an example, we apply the abstract results to a strongly damped wave equation.
description: 33 pages
Δημιουργική λογιστική και μάνατζμεντ των κερδών
Creators: name: Μουτσιανάς, Κωνσταντίνος Απόστολου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Δημιουργική λογιστική
Διαχείριση κερδών
Παραποίηση οικονομικών καταστάσεων
Creative accounting
Earnings management
Fraudulent financial statements

description: Η εργασία ασχολείται με τη δημιουργική λογιστική και τη διαχείρηση των κερδών που εφαρμόζουν οι managers προκειμένου να εμφανίσουν τα κέρδη με τον τρόπο που επιθυμούν αυτοί. Επίσης περιγράφονται τα κίνητρα που ωθούν τους managers στη διαχείρηση των κερδών. Η παραποίηση των οικονομικών καταστάσεων αποτελεί την πιο σημαντική συνέπεια της δημιουργικής λογιστικής και αναλύεται σε ξεχωριστή ενότητα. Τέλος, περιγράφονται μέθοδοι εντοπισμού του earning management και κάποια "λογιστικά τεχνάσματα".
description: The diplomatic work deals with the creative accounting and the earnings management that they applied by managers in order to present the profits with the way that they want. Also, are described the motives that prompt managers in the earnings management. The manipulation of financial statements constitutes the most important consequense of creative accounting, and is analyzed in separate unit. Finally, are described methods of detecting earnings management.
Basket Recommendation with Multi-Intent Translation Graph Neural Network
Creators: name: Liu, Zhiwei
name: Li, Xiaohan
name: Fan, Ziwei
name: Guo, Stephen
name: Achan, Kannan
name: Yu, Philip S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Retrieval (cs.IR)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The problem of basket recommendation~(BR) is to recommend a ranking list of items to the current basket. Existing methods solve this problem by assuming the items within the same basket are correlated by one semantic relation, thus optimizing the item embeddings. However, this assumption breaks when there exist multiple intents within a basket. For example, assuming a basket contains \{\textit{bread, cereal, yogurt, soap, detergent}\} where \{\textit{bread, cereal, yogurt}\} are correlated through the "breakfast" intent, while \{\textit{soap, detergent}\} are of "cleaning" intent, ignoring multiple relations among the items spoils the ability of the model to learn the embeddings. To resolve this issue, it is required to discover the intents within the basket. However, retrieving a multi-intent pattern is rather challenging, as intents are latent within the basket. Additionally, intents within the basket may also be correlated. Moreover, discovering a multi-intent pattern requires modeling high-order interactions, as the intents across different baskets are also correlated. To this end, we propose a new framework named as \textbf{M}ulti-\textbf{I}ntent \textbf{T}ranslation \textbf{G}raph \textbf{N}eural \textbf{N}etwork~({\textbf{MITGNN}}). MITGNN models $T$ intents as tail entities translated from one corresponding basket embedding via $T$ relation vectors. The relation vectors are learned through multi-head aggregators to handle user and item information. Additionally, MITGNN propagates multiple intents across our defined basket graph to learn the embeddings of users and items by aggregating neighbors. Extensive experiments on two real-world datasets prove the effectiveness of our proposed model on both transductive and inductive BR. The code is available online at https://github.com/JimLiu96/MITGNN.
description: Accepted to IEEE Bigdata 2020. Code is available online at https://github.com/JimLiu96/MITGNN
Black hole accretion: theoretical limits and observational implications
Creators: name: Heinzeller, D.
name: Duschl, W. J.
name: Mineshige, S.
name: Ohsuga, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recently, the issue of the role of the Eddington limit in accretion discs became a matter of debate. While the classical (spherical) Eddington limit is certainly an over-simplification, it is not really clear how to treat it in a flattened structure like an accretion disc. We calculate the critical accretion rates and resulting disc luminosities for various disc models corresponding to the classical Eddington limit by equating the attractive and repulsive forces locally. We also discuss the observational appearance of such highly accreting systems by analyzing their spectral energy distributions. Our calculations indicate that the allowed mass accretion rates differ considerably from what one expects by applying the Eddington limit in its classical form, while the luminosities only weakly exceed their classical equivalent. Depending on the orientation of the disc relative to the observer, mild relativistic beaming turns out to have an important influence on the disc spectra. Thus, possible super-Eddington accretion, combined with mild relativistic beaming, supports the idea that ultraluminous X-ray sources host stellar mass black holes and accounts partially for the observed high temperatures of these objects.
description: to appear in "Black Holes: from Stars to Galaxies" Proceedings IAU Symp. No. 238, eds. V. Karas & G. Matt; 4 pages, 2 figures, needs iaus.cls
Versatile wet deposition techniques for functional oxide coatings on glass
Creators: name: Pütz, Jörg
name: Aegerter, Michel A.
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2004
Subjects: subject: 660

description: Α wet chemieal processing based on sol-gel materials or nanopartieles opens the entire spectrum of wet coating techniques for the deposition of functional oxide coatings. In practice, however, an adaptation of the deposition techniques and the coating solutions or dispersions is required to cope with the peculiarities of substrates and applications. Examples of recent developments in this field are shown for the deposition of transparent conducting oxide (TCO) coatings, which represent a class of materials of significant technological relevance for display applications and antistatics. Α modified dip coating technique for the inside coating of glass tubes is presented, as well as the utilization of the spraying techniques for the manual or automated wet deposition on both shaped and large-area flat glass substrates. The employment of nanoparticles of indium tin oxide (ITO), moreover, paves the way to a most flexible and fast low-temperature processing of coatings. This way, not only tempered and pre-treated glass and plastic substrates can be coated, but also patterns can easily be realized.
Two years of pulsar observations with the Ultra-Wideband Receiver on the Parkes radio telescope
Creators: name: Johnston, Simon
name: Sobey, C.
name: Dai, S.
name: Keith, M.
name: Kerr, M.
name: Manchester, R. N.
name: Oswald, L. S.
name: Parthasarathy, A.
name: Shannon, R. M.
name: Weltevrede, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The major programme for observing young, non-recycled pulsars with the Parkes telescope has transitioned from a narrow-band system to an ultra-wideband system capable of observing between 704 and 4032 MHz. We report here on the initial two years of observations with this receiver. Results include dispersion measure (DM) and Faraday rotation measure (RM) variability with time, determined with higher precision than hitherto, flux density measurements and the discovery of several nulling and mode changing pulsars. PSR J1703-4851 is shown to be one of a small subclass of pulsars that has a weak and a strong mode which alternate rapidly in time. PSR J1114-6100 has the fourth highest |RM| of any known pulsar despite its location far from the Galactic Centre. PSR J1825-1446 shows variations in both DM and RM likely due to its motion behind a foreground supernova remnant.
description: Accepted for publication in MNRAS. This version fixes transcription errors in Table 4
Αξιολόγηση του προγράμματος "ένταξη παιδιών με νοητική καθυστέρηση στη γειτονιά": η οπτική των γονιών
Creators: name: Ρόμπα, Μαρία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Κοινωνική ένταξη
Νοητική καθυστέρηση
Οικογένεια παιδιών με ειδικές ανάγκες
Γειτονιά-Ενταξη
Εφηβος με ειδικές ανάγκες-νοητική υστέρηση
Αυτονομία
Social integration
Mental retardation
Family of children with special needs
Family
Adolescent with special needs
Autonomy

description: Στην εργασία αυτή παρουσιάζονται τα αποτελέσματα και η επίδραση ενός προγράμματος που πραγματοποιήθηκε στο 4ο Δημοτικό σχολείο ειδικής αγωγής Θεσσαλονίκης με τίτλο "Κοινωνική ένταξη παιδιών με νοητική καθυστέρηση στην οικογένεια, τη γειτονιά και την πόλη" σύμφωνα με τις απόψεις και τις εκτιμήσεις των γονιών. Σύμφωνα με τα αποτελέσματα της έρευνας που πραγματοποιήθηκε με συνεντεύξεις, όλοι οι γονείς δηλώνουν ικανοποιημένοι από το πρόγραμμα για πολλούς κια διαφορετικούς λόγους.
description: This study presents the results and the effect of a program that took place in the 4th Primary school of Special Education in Thessaloniki and was named "Social integration of children with mental retardation in the family, the neibourhood and the town" according to the opinions and estimation of the parents of the children that took place in the program. According to the results of the study that was conducted with interviews, all parents were satisfied by the program for different and many reasons.
UV light induced photoreduction in phosphate and fluoridephosphate glasses doped with Ni2+, Ta5+, Pb2+, and Ag+ compounds
Creators: name: Möncke, Doris
name: Ehrt, Doris
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2004
Subjects: subject: 660

description: The photoreduction of polyvalent ions was studied in high purity fluoride-phosphate and metaphosphate glasses doped with Ni2+ (3d8), Ta5+ (5d0), Pb2+ (6d2), and Ag+ (3d10). Compared to the undoped base glasses all doped samples display different electronic transitions in the UV at the irradiation wavelength. Glass samples containing 50 to 5000 ppm dopants were irradiated with excimer lasers at 193 and 248 nm, respectively. The subsequent defect centers, formed at ppm levels, were characterized by EPR and optical UV-VIS spectroscopy. The observed laser induced transmission losses in the UV and visible range increased in the order Ni, Ta, Pb to Ag. Extrinsic electron centers are formed by photoreduction of the dopants. (Ni2+)- is characterized by an optical transition with a maximum at 355 nm and an EPR signal around g ≈ 2.07. The maxima of the optical transitions of the (Pb2+)- -EC are positioned at 395 and 500 nm, of the (Ta5+)- -EC at 465 nm. The photoionization products of silver depend strongly on the silver concentration. At a silver content of 50 ppm only the (Ag+)- -EC is formed, visible in the optical spectra with a maximum around 450 nm. Α second silver species, (Ag+)2 -, which absorbs at 305 nm, is additionally observed in the sample doped with a silver concentration of 500 ppm. In the sample doped with 5000 ppm silver a third defect, the photooxidized (Ag+)+ -HC, with an optical band maximum at 405 nm and an EPR signal around g ≈ 2.3 is observed as well. The formation of extrinsic electron centers causes in all glasses an increase in the formation of intrinsic hole centers and often a decrease in the formation of intrinsic electron centers. Defect generation curves show that a very rapid darkening in the glasses is initiated by the addition of any of these dopants. The recovery rates of the defeets formed depend strongly on the dopant, not on the glass matrix.
Sparticle Masses in Higgsed Gauge Mediation
Creators: name: Gorbatov, Elie
name: Sudano, Matthew
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We generalize the gauge sector of gauge-mediated supersymmetry breaking to allow for an arbitrary gauge group with an arbitrary supersymmetric Higgsing. The sparticle masses are computed to leading order in the gauge coupling. The generic effect on the MSSM spectrum from additional Higgsed gauge structure is to increase the sfermion masses relative to the gaugino masses.
description: typos in formulas in the appendix corrected
[Rezension von: Nach Gott im Leben fragen, ökumenische Einführung in das Christentum, Ulrike Link-Wieczorek ...]
Creators: name: Hailer, Martin
name: Link-Wieczorek, Ulrike
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 54 Nr. 4 (2005): Ökumenische Rundschau, Band 54, Heft 4
Η λευκή ψήφος ως παράδειγμα της ειδικής θεσμικής αρμοδιότητας του ΑΕΔ δικαστικού ελέγχου παραβάσεων σχετικών με την ενέργεια των εκλογών
Creators: name: Κυβέλος, Σωτήριος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Λευκή ψήφος
Ελεγχος του κύρους των εκλογών
Ανώτατο Ειδικό Δικαστήριο (ΑΕΔ)
Απόφαση 12/2005 ΑΕΔ
Ελεγχος συνταγματικότητας εκλογικού συστήματος
Εκλογικό δίκαιο
Voto blank
Judicial review
Supreme Court
Greek elections
Elections law

description: Το Σύνταγμα έχει αναθέσει στο Α.Ε.Δ. την αποκλειστική αρμοδιότητα δικαστικού ελέγχου παραβάσεων σχετικά με την ενέργεια των εκλογών. Με αφορμή την προβληματική της λευκής ψήφου και την απόφαση υπ΄ αριθ. 12/2005 του Α.Ε.Δ. τέθηκε ζήτημα σχετικά με τα όρια της θεσμικής αρμοδιότητας του ΑΕΔ να ελέγχει το κύρος των εκλογών. Το Α.Ε.Δ. εν προκειμένω συνήγαγε κανόνα συνταγματικής περιωπής, ο οποίος συνίστατο στην «υποχρεωτική παροχή της δυνατότητας έστω συνεκτίμησης της λευκής ψήφου στο εκλογικό αποτέλεσμα» και όχι στην εκ των προτέρων εξομοίωση της με την άκυρη ψήφο. Ακολούθως ενόψει του ανωτέρω κανόνα, το Α.Ε.Δ. παραμέρισε την ακολουθούμενη ερμηνευτική πρακτική (λόγω απουσίας ρητής νομοθετικής διατάξεως) και «δικαιοθέτησε» κατασκευάζοντας στην ουσία νέα εκλογική διάταξη αριθμητικού συνυπολογισμού της λευκής ψήφου στις έγκυρες ψήφους. Τίθεται ως εκ τούτου ζήτημα υπέρβασης της αρμοδιότητας του Α.Ε.Δ. αφού οι τεχνικές εκλογικές διατάξεις εναπόκεινται στην αποκλειστική διακριτική ευχέρεια του εκλογικού Νομοθέτη. Ο ρόλος όμως του Α.Ε.Δ. ως Εκλογοδικείου συνίσταται στο να «καθοδηγεί» διαπαιδαγωγεί τον εκλογικό Νομοθέτη για τις ορθές εκλογικές ρυθμίσεις, διεπόμενο από τάσεις αυτοσυγκράτησης και όχι να τον υποκαθιστά. Εξίσου ο εκλογικός Νομοθέτης οφείλει να συνεκτιμά τον θεσμικό συμβουλευτικό ρόλο του Α.Ε.Δ. και να μην αγνοεί τις ουσιαστικές κρίσεις που αυτό διατυπώνει με τελικό σκοπό την ισορροπία του κοινοβουλευτικού συστήματος.
description: Vote blank has political sence. Supreme Court has the possibility to review violations in relation to the elections.
Semi-analytic calculation of the monopole order parameter in QCD
Creators: name: Di Giacomo, Adriano
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The monopole order parameter of QCD is computed in terms of gauge invariant field strength correlators. Both quantities are partially known from numerical simulations on the lattice. A new insight results on the structure of the confining vacuum.
description: Talk presented at QCD06, Montpellier 3-7 July 2006. To appear in the proceedings
Εταιρική διακυβέρνηση επιμέρους λύσεις-προοπτικές προσέγγισης
Creators: name: Τσιλιγκερίδης, Κωνσταντίνος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Εταιρική διακυβέρνηση
Διοικητικό συμβούλιο
Εποπτικό συμβούλιο
Γενική Συνέλευση Μετόχων
Corporate governance
Supervisory board
Director's board
Shokesholder's general meeting
Stokeholder

description: Περιγραφή των συστημάτων εταιρικής διακυβέρνησης των δυο κυριοτέρων οικογενειών δικαίου, του common law και του civil law, καθώς και αιτιολόγηση των λόγων της μεταξύ τους απόκλισης. Στη συνέχεια γίνεται η περιγραφή των λύσεων που προτείνει η Ευρωπαϊκή Ενωση καθώς και ο Οργανισμός για την Οικονομική Συνεργασία και Ανασυγκρότηση. Τέλος, εξετάζονται οι προοπτικές σύγκλησης των συστημάτων εταιρικής διακυβέρνησης είτε μέσω κανονιστικής παρέμβασης, είτε μέσω της δυναμικής των αγορών.
description: Description of corporate systems of the mail families law, common law and civil law and an explaination why the solutions that they give are different. In adddition follows the description of two supernatural models this of the European Community and this of Organization for the Economic Cooproretion and Development. This past part includes the possibilities of de jure or defacto harmonization of corporate Governance codes and quidelines.
UV laser radiation for microstructuring of photostructurable glasses
Creators: name: Brokmann, Ulrike
name: Harnisch, Alf
name: Ertel-Ingrisch, Werner
name: Hülsenberg, Dagmar
Publisher: name: Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Year: 2004
Subjects: subject: 660

description: Photostructurable glasses are important materials for applications in microsystems. They enable structures with high aspect ratios and a high dependability of mechanical, optical and chemical properties in a large range of temperatures. The exposure of photostructurable glasses to UV laser radiation, as a rapid prototyping technique, is an alternative method to the exposure by a mask aligner. Α photostructurable glass (FS21) was exposed to UV laser radiation of the wavelengths 248, 308 and 355 nm. Investigated was the influenee of the exposure parameters wavelength of laser radiation and energy density on structuring results such as crystallization depth, lateral geometry of crystallized areas, structure of crystallized areas and etch angle for single pulse exposure.
Ising-Based Louvain Method: Clustering Large Graphs with Specialized Hardware
Creators: name: Kalehbasti, Pouya Rezazadeh
name: Ushijima-Mwesigwa, Hayato
name: Mandal, Avradip
name: Ghosh, Indradeep
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: I.2.6

description: Recent advances in specialized hardware for solving optimization problems such quantum computers, quantum annealers, and CMOS annealers give rise to new ways for solving real-word complex problems. However, given current and near-term hardware limitations, the number of variables required to express a large real-world problem easily exceeds the hardware capabilities, thus hybrid methods are usually developed in order to utilize the hardware. In this work, we advocate for the development of hybrid methods that are built on top of the frameworks of existing state-of-art heuristics, thereby improving these methods. We demonstrate this by building on the so called Louvain method, which is one of the most popular algorithms for the Community detection problem and develop and Ising-based Louvain method. The proposed method outperforms two state-of-the-art community detection algorithms in clustering several small to large-scale graphs. The results show promise in adapting the same optimization approach to other unsupervised learning heuristics to improve their performance.
description: 12 pages, 2 figures, submitted to IDA2021
Average cluster size inside sediment left after droplet desiccation
Creators: name: Zolotarev, Pavel
name: Kolegov, Konstantin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In this work, we continue to study the formation of particle chains (clusters) inside the annular sediment during the drying of a colloidal droplet on a substrate. The average value of the cluster size was determined after processing experimental data from other authors. We performed a series of calculations and found the value of the model parameter allowed to get numerical results agreed with the experiment. Also, a modification of the previously proposed algorithm is analyzed here.
description: International Conference on Computer Simulation in Physics and beyond 2020