cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A study on French-Greek bilingual schoolchildren
Creators: name: Τέγου, Σουλτάνα Μιλτιάδη
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Γλωσσολογία
Διγλωσσία
Γαλλο-ελληνόφωνα παιδιά
Linguistics-Bilingualism
French-Greek bilingual children

description: Σκοπός της διατριβής ήταν η μελέτη της γλωσσικής επίδοσης μίας ομάδας 12 δίγλωσσων γαλλο-ελληνόφωνων παιδιών σχολικής ηλικίας, από 7 έως 11 ετών, σε τρεις γλωσσικές δοκιμασίες με στόχο την παραγωγή κλιτικών μορφών. Εξετάσαμε την επίδραση που έχει η εργαζόμενη μνήμη (working memory), η μη λεκτική νοημοσύνη (nonverbal intelligence) και το γλωσσικό υπόβαθρο των παιδιών (χρήση της γλώσσας και γραμματισμός (literacy)) στην επίδοσή τους στις γλωσσικές δοκιμασίες. Παρουσιάσαμε αναλυτικά πως τα δίγλωσσα γαλλο-ελληνόφωνα παιδιά τείνουν να παρουσιάζουν υψηλότερες επιδόσεις σε δοκιμασίες που αφορούν την εργαζόμενη μνήμη, σε σχέση με τα μονόγλωσσα παιδιά της ίδιας ηλικίας. Αναφερθήκαμε στην επίδραση που έχει ο συνεχής εγγραματισμός στην ανάπτυξη λεξιλογίου τόσο στα γαλλικά όσο και στα ελληνικά, στα δίγλωσσα παιδιά, ενώ επίσης αναλύσαμε το γεγονός ότι ο αναδυόμενος γραμματισμός παίζει σπουδαίο ρόλο στην πρώιμη ανάπτυξη λεξιλογίου όπως φάνηκε από τις επιδόσεις των μικρότερων σε ηλικία δίγλωσσων παιδιών. Τα μονόγλωσσα παιδιά είχαν υψηλότερες επιδόσεις από τα δίγλωσσα, στην παραγωγή κλιτικών. Τα δίγλωσσα παιδιά παρουσίασαν σημαντικά περισσότερα λάθη στη συμφωνία του γένους από τα μονόγλωσσα σε ορισμένες δοκιμασίες, ενώ παρατηρήθηκε υψηλός βαθμός παράλειψης του κλιτικού μορφήματος γ’ ενικού αιτιατικής, στην παραγωγή του γαλλικού κλιτικού συμπλέγματος από τα δίγλωσσα παιδιά.
description: In this paper we were concerned with the linguistic performance of a group of 12 French-Greek bilingual schoolchildren, aged 7 to 11 years old, in three clitic elicitation tasks. The effect that working memory, nonverbal intelligence and the children’s linguistic background (language use and literacy) have on their performance are the main issues discussed. Results about reflexive clitics and reflexive verb forms are also presented. It was found that French-Greek school-children tend to have higher working memory scores than Greek monolinguals. Current literacy practice is a predictor for higher vocabulary proficiency scores in both Greek and French in the bilingual children, while early literacy seems to be important for high vocabulary scores in younger bilingual children. The monolingual children scored higher in clitic production than the bilinguals. The bilingual group made significantly more gender errors than the monolinguals in certain tasks, and a high rate of omission of the 3rd person accusative clitic was found in the production of the French clitic cluster by the bilingual children.
PIERES: A Playground for Network Interrupt Experiments on Real-Time Embedded Systems in the IoT
Creators: name: Bender, Franz
name: Brune, Jan Jonas
name: Keutel, Nick Lauritz
name: Behnke, Ilja
name: Thamsen, Lauritz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences
subject: I.6.7; B.8.1

description: IoT devices have become an integral part of our lives and the industry. Many of these devices run real-time systems or are used as part of them. As these devices receive network packets over IP networks, the network interface informs the CPU about their arrival using interrupts that might preempt critical processes. Therefore, the question arises whether network interrupts pose a threat to the real-timeness of these devices. However, there are few tools to investigate this issue. We present a playground which enables researchers to conduct experiments in the context of network interrupt simulation. The playground comprises different network interface controller implementations, load generators and timing utilities. It forms a flexible and easy to use foundation for future network interrupt research. We conduct two verification experiments and two real world examples. The latter give insight into the impact of the interrupt handling strategy parameters and the influence of different load types on the execution time with respect to these parameters.
description: The Ninth International Workshop on Load Testing and Benchmarking of Software Systems (LTB 2021)
Αίθουσες εστιάσεων και συμποσίων αρχαϊκής περιόδου σε ελληνικά ιερά
Creators: name: Τεκίδου, Ειρήνη Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: εστιατόριον
αίθουσες εστιάσεων
αίθουσες συμποσίων
hestiatorion
dining rooms
symposium

description: Αντικείμενο της εργασίας αποτελούν οι αίθουσες εστιάσεων και συμποσίων των αρχαϊκών χρόνων στα ιερά της μητροπολιτικής Ελλάδας και των νησιών. Συγκεκριμένα, αναλύονται τα πρωιμότερα παραδείγματα αυτής της κατηγορίας αιθουσών και οικοδομημάτων που πρωτοεμφανίζονται κατά την αρχαϊκή εποχή, με σκοπό να εξεταστούν οι απαρχές των αρχιτεκτονικών τύπων και της τελετουργίας της συνεστίασης.
description: The object of the thesis concerns the dining and symposia halls of the archaic sanctuaries in the mainland and islands of Greece. Specifically, it analyses the earliest examples of this category of rooms, halls and buildings which first appear during the archaic period in order to examine the origins of their architectural types and the ritual of banqueting.
Magnetic Field Seeding by Galactic Winds
Creators: name: Bertone, Serena
name: Vogt, Corina
name: Ensslin, Torsten
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The origin of intergalactic magnetic fields is still a mystery and several scenarios have been proposed so far: among them, primordial phase transitions, structure formation shocks and galactic outflows. In this work we investigate how efficiently galactic winds can provide an intense and widespread "seed" magnetisation. This may be used to explain the magnetic fields observed today in clusters of galaxies and in the intergalactic medium (IGM). We use semi-analytic simulations of magnetised galactic winds coupled to high resolution N-body simulations of structure formation to estimate lower and upper limits for the fraction of the IGM which can be magnetised up to a specified level. We find that galactic winds are able to seed a substantial fraction of the cosmic volume with magnetic fields. Most regions affected by winds have magnetic fields in the range -12 < Log B < -8 G, while higher seed fields can be obtained only rarely and in close proximity to wind-blowing galaxies. These seed fields are sufficiently intense for a moderately efficient turbulent dynamo to amplify them to the observed values. The volume filling factor of the magnetised regions strongly depends on the efficiency of winds to load mass from the ambient medium. However, winds never completely fill the whole Universe and pristine gas can be found in cosmic voids and regions unaffected by feedback even at z=0. This means that, in principle, there might be the possibility to probe the existence of primordial magnetic fields in such regions.
description: 14 pages, 5 figures. Accepted for publications by MNRAS. A high resolution version of the paper is available at http://astronomy.sussex.ac.uk/~sb207/Papers/bb.ps.gz
Many Electrons and the Photon Field -- The many-body structure of nonrelativistic quantum electrodynamics
Creators: name: Buchholz, Florian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Recent experimental progress in the field of cavity quantum electrodynamics allows to study the regime of strong interaction between quantized light and complex matter systems. Due to the coherent coupling between photons and matter-degrees of freedom, polaritons -- hybrid light-matter quasiparticles -- emerge, which can significantly influence matter properties and complex processes such as chemical reactions (strong coupling). In this thesis we propose a way to overcome these problems by reformulating the coupled electron-photon problem in an exact way in a different, purpose-build Hilbert space, where no longer electrons and photons are the basic physical entities but the polaritons. Representing an N-electron-M-mode system by an N-polariton wave function with hybrid Fermi-Bose statistics, we show explicitly how to turn electronic-structure methods into polaritonic-structure methods that are accurate from the weak to the strong-coupling regime. We elucidate this paradigmatic shift by a comprehensive review of light-matter coupling, as well as by highlighting the connection between different electronic-structure methods and quantum-optical models. This extensive discussion accentuates that the polariton description is not only a mathematical trick, but it is grounded in a simple and intuitive physical argument: when the excitations of a system are hybrid entities a formulation of the theory in terms of these new entities is natural. Finally, we discuss in great detail how to adopt standard algorithms of electronic-structure methods to adhere to the new hybrid Fermi-Bose statistics. Guaranteeing the corresponding nonlinear inequality constraints in practice requires a careful development, implementation and validation of numerical algorithms. This extra numerical complexity is the price we pay for making the coupled matter-photon problem feasible for first-principle methods.
description: doctoral thesis
Magnetic and structural properties of GeMn films: precipitation of intermetallic nanomagnets
Creators: name: Ahlers, S.
name: Bougeard, D.
name: Sircar, N.
name: Abstreiter, G.
name: Trampert, A.
name: Opel, M.
name: Gross, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We present a comprehensive study relating the nanostructure of Ge_0.95Mn_0.05 films to their magnetic properties. The formation of ferromagnetic nanometer sized inclusions in a defect free Ge matrix fabricated by low temperature molecular beam epitaxy is observed down to substrate temperatures T_S as low as 70 deg. Celsius. A combined transmission electron microscopy (TEM) and electron energy-loss spectroscopy (EELS) analysis of the films identifies the inclusions as precipitates of the ferromagnetic compound Mn_5Ge_3. The volume and amount of these precipitates decreases with decreasing T_S. Magnetometry of the films containing precipitates reveals distinct temperature ranges: Between the characteristic ferromagnetic transition temperature of Mn_5Ge_3 at approximately room temperature and a lower, T_S dependent blocking temperature T_B the magnetic properties are dominated by superparamagnetism of the Mn_5Ge_3 precipitates. Below T_B, the magnetic signature of ferromagnetic precipitates with blocked magnetic moments is observed. At the lowest temperatures, the films show features characteristic for a metastable state.
description: accepted for publication in Phys. Rev. B 74 (01.12.2006). High resolution images ibidem
Fast acquisition of spin-wave dispersion by compressed sensing
Creators: name: Kainuma, Ryo
name: Matsumoto, Keita
name: Satoh, Takuya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: For the realization of magnonic devices, spin-wave dispersions need to be identified. Recently, the time-resolved pump-probe imaging method combined with the Fourier transform was demonstrated for obtaining the dispersions in the lower-wavenumber regime. However, the measurement takes a long time when the sampling rate is sufficiently high. Here, we demonstrated the fast acquisition of spin-wave dispersions by using the compressed sensing technique. Further, we quantitatively evaluated the consistency of the results. Our results can be applied to other various pump-probe measurements, such as observations based on the electro-optical effects.
description: 5 pages, 4 figures
Signatures for right-handed neutrinos at the Large Hadron Collider
Creators: name: Huitu, Katri
name: Khalil, Shaaban
name: Okada, Hiroshi
name: Rai, Santosh Kumar
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We explore possible signatures for right-handed neutrinos in TeV scale B-L extension of the Standard Model (SM) at the Large Hadron Collider (LHC). The studied four lepton signal has a tiny SM background. We find the signal experimentally accessible at LHC for the considered parameter regions.
description: 4 pages, 6 figures. Published version
Διδακτικοί σκοποί και στόχοι του ισχύοντος Προγράμματος Σπουδών για το μάθημα της Μουσικής στο Δημοτικό και Γυμνάσιο
Creators: name: Κωνσταντινίδης, Αντώνιος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Μουσική-Αναλυτικά Προγράμματα
Διδακτική Ανάλυση
Music-Curriculum
Didactical Analysis

description: Η Μουσική Τέχνη και ειδικότερα το μάθημα της Μουσικής θεωρείται αναπόσπαστο στοιχείο στα Αναλυτικά Προγράμματα που αφορούν την υποχρεωτική εκπαίδευση. Ειδικότερες μελέτες έρχονται να τεκμηριώσουν επιστημονικά τη συνεισφορά της Μουσικής παιδείας στη δόμηση της προσωπικότητας του παιδιού και την άμεση σύνδεσή της με τη γνωστική, συναισθηματική και ψυχοκινητική του ανάπτυξη. Το μάθημα της Μουσικής στο ισχύον Αναλυτικό Πρόγραμμα Σπουδών της Πρωτοβάθμιας και Δευτεροβάθμιας εκπαίδευσης, έχει εργαστηριακό προσανατολισμό, βασίζεται στη βιωματική προσέγγιση των μουσικών εννοιών και περιλαμβάνει ένα συνδυασμό θεωρητικής γνώσης, πρακτικών δεξιοτήτων και δημιουργικών διαδικασιών. Η ιδιαίτερα αποκαλυπτική στην εξέλιξη της, διερεύνηση των επιπέδων μάθησης και μαζί η ανάδειξη των διδακτικών διαστάσεων του Αναλυτικού Προγράμματος της Μουσικής, από θεωρητική και μαθηματική οπτική, αποτέλεσαν το αντικείμενο της παρούσης έρευνας. Με τη χρήση της "Γεωμετρικής Διδακτικής Ανάλυσης" (GE. DI. AN) μιας νέας και πρωτότυπης μεθόδου Ανάλυσης Δεδομένων, κατέστη δυνατή η ποσοτική σύζευξη ποιοτικών παραμέτρων, όπως οι ταξινομίες των διδακτικών στόχων, η ερμηνευτική προσέγγιση ποσοτήτων, η οπτική τους απεικόνιση και η συσχέτισή τους, οδηγώντας την έρευνά μας σε αξιοσημείωτα συμπεράσματα.
description: This present postgraduate thesis was carried out in order to analyze the current Curriculum of Music regarding the educational aims of that. Regarding the curricula of the obligatory education, the subject of Music is supposed to be an essential element. A number of researches and special studies confirm and establish scientifically the contribution of musical education in the child's personality and the direct connection of that with his cognitive, emotional and psychokinetic development. In the modern Greek educational society, we can observe that the current Curriculum for the subject of Music in the primary and secondary education, has a practical form and orientation and includes a combination of theoretical knowledge, practical abilities and prolific procedures. This specially revealing probe of the educational levels together with the emergence of the educational side of the curriculum regarding the subject of Music both from a practical and a mathematical point of view, compromised our scientific field. With the use of Geometrical Didactical Analysis (Ge. Di. An.), which is a new and original method of Data Analysis it was made possible for us to combine some qualitative parameters such as the classification of the educational goals and the expository approach of some qualities as well as their visual depiction through the linkage of characteristics and classifications. Finally, the specific results from the usage of Ge. Di. An. in the current Curriculum of Music are presented in our probe.
Template banks based on $\mathbb{Z}^n$ and $A_n^*$ lattices
Creators: name: Allen, Bruce
name: Shoom, Andrey A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Matched filtering is a traditional method used to search a data stream for signals. If the source (and hence its $n$ parameters) are unknown, many filters must be employed. These form a grid in the $n$-dimensional parameter space, known as a template bank. It is often convenient to construct these grids as a lattice. Here, we examine some of the properties of these template banks for $\mathbb{Z}^n$ and $A_n^*$ lattices. In particular, we focus on the distribution of the mismatch function, both in the traditional quadratic approximation and in the recently-proposed spherical approximation. The fraction of signals which are lost is determined by the even moments of this distribution, which we calculate. Many of these quantities we examine have a simple and well-defined $n\to\infty$ limit, which often gives an accurate estimate even for small $n$. Our main conclusions are the following: (i) a fairly effective template-based search can be constructed at mismatch values that are shockingly high in the quadratic approximation; (ii) the minor advantage offered by an $A_n^*$ template bank (compared to $\mathbb{Z}^n$) at small template separation becomes even less significant at large mismatch. So there is little motivation for using template banks based on the $A_n^*$ lattice.
description: 17 pages, 8 figures
K-->pipi amplitudes from lattice QCD with a light charm quark
Creators: name: Giusti, L.
name: Hernandez, P.
name: Laine, M.
name: Pena, C.
name: Wennekers, J.
name: Wittig, H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We compute the leading-order low-energy constants of the DeltaS=1 effective weak Hamiltonian in the quenched approximation of QCD with up, down, strange, and charm quarks degenerate and light. They are extracted by comparing the predictions of finite volume chiral perturbation theory with lattice QCD computations of suitable correlation functions carried out with quark masses ranging from a few MeV up to half of the physical strange mass. We observe a large DeltaI=1/2 enhancement in this corner of the parameter space of the theory. Although matching with the experimental result is not observed for the DeltaI=1/2 amplitude, our computation suggests large QCD contributions to the physical DeltaI=1/2 rule in the GIM limit, and represents the first step to quantify the role of the charm quark-mass in K-->pipi amplitudes.
description: 4 pages, 1 figure. Minor modifications. Final version to appear on PRL
Elliptic parameters and defining equations for elliptic fibrations on a Kummer surface
Creators: name: Kuwata, Masato
name: Shioda, Tetsuji
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J27; 14J28

description: We pose the problem to determine explicit defining equations of various elliptic fibrations on a given $K3$ surface, and study the case of the Kummer surfaces of the product of two elliptic curves.
description: 34 pages, 17 figures; section 6 added, typos corrected
The first GeV flare of the radio-loud narrow-line Seyfert 1 galaxy PKS 2004-447
Creators: name: Gokus, Andrea
name: Paliya, Vaidehi S.
name: Wagner, Sarah M.
name: Buson, Sara
name: D'Ammando, Filippo
name: Edwards, Philip G.
name: Kadler, Matthias
name: Meyer, Manuel
name: Ojha, Roopesh
name: Stevens, Jamie
name: Wilms, Jörn
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: On 2019 October 25, the Fermi-Large Area Telescope observed the first gamma-ray flare from the radio-loud narrow-line Seyfert 1 (NLSy 1) galaxy PKS 2004$-$447 ($z=0.24$). We report on follow-up observations in the radio, optical-UV, and X-ray bands that were performed by ATCA, the Neil Gehrels Swift observatory, XMM-Newton, and NuSTAR, respectively, and our multi-wavelength analysis. We study the variability across all energy bands and additionally produce $γ$-ray light curves with different time binnings to study the variability on short timescales during the flare. We examine the X-ray spectrum from 0.5$-$50 keV by describing the spectral shape with an absorbed power law. We analyse multi-wavelength datasets before, during, and after the flare and compare these with a low activity state of the source by modelling the respective SEDs with a one-zone synchrotron inverse Compton radiative model. Finally, we compare our results to gamma-ray flares previously observed from other $γ$-loud NLSy 1 galaxies. At gamma-ray energies (0.1$-$300 GeV) the flare reached a total maximum flux of $(2.7\pm0.6)\times10^{-6}$~ph~cm$^{-2}$~s$^{-1}$ in 3-hour binning. With a photon index of $Γ_{0.1-300\mathrm{GeV}}=2.42\pm0.09$ during the flare, this corresponds to an isotropic gamma-ray luminosity of $(2.9\pm0.8)\times10^{47}\,\mathrm{erg}\,\mathrm{s}^{-1}$. The $γ$-ray, X-ray, and optical-UV light curves covering the end of September to the middle of November show significant variability, and we find indications for flux-doubling times of $\sim 2.2$~hours at $γ$-ray energies. During the flare, the SED exhibits large Compton dominance. While the increase in the optical-UV range can be explained by enhanced synchrotron emission, the elevated $γ$-ray flux can be accounted for by an increase in the bulk Lorentz factor of the jet, similarly observed for flaring gamma-ray blazars.
description: 17 pages, 7 figures. Accepted for publication in Astronomy & Astrophysics
Invisible Higgs boson decay in the littlest Higgs model with T-parity
Creators: name: Hundi, Raghavendra Srikanth
name: Mukhopadhyaya, Biswarup
name: Nyffeler, Andreas
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the invisible decay of the Higgs boson into a pair of stable, heavy photons, H -> A_H A_H, in the littlest Higgs model with T-parity. For a symmetry breaking scale of f = 450 GeV, the branching ratio H -> A_H A_H can be as high as 93% for Higgs masses below 150 GeV. For f = 500 GeV, the invisible branching ratio is about 75% in the Higgs mass range 135 - 150 GeV and 10 (5.5)% for m_H = 200 (600) GeV. It drops to a few percent for f larger than 600 GeV. We have found regions in parameter space, allowed by the electroweak precision data, with such low values of f for 115 GeV < m_H < 650 GeV.
description: 14 pages, 3 figures, Latex; v2: a few comments and references added, typos corrected, conclusions unchanged, version to be published in Physics Letters B
$B^0 \to ωη^{(\prime)}$ and $ϕη^{(\prime)}$ decays in the perturbative QCD approach
Creators: name: Guo, Dong-Qin
name: Chen, Xin-Fen
name: Xiao, Zhen-Jun
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the branching ratios and CP-violating asymmetries for $B^0 \toωη$, $ωη^\prime$, $ϕη$ and $ϕη^\prime$ decays in the perturbative QCD (pQCD) factorization approach. The pQCD predictions for the CP-averaged branching ratios are $Br(B^0 \to ωη) = \left (2.7 ^{+1.1}_{-1.0})\times 10^{-7}$, $Br(B^0 \to ωη^\prime) = \left (0.75 ^{+0.37}_{-0.33}) \times 10^{-7}$, and $Br(B^0 \to ϕη) = \left (6.3 ^{+3.3}_{-1.9}) \times 10^{-9}$, $Br(B^0 \to ϕη^{\prime}) = \left (7.3^{+3.5}_{-2.6}) \times 10^{-9}$ which are consistent with currently available experimental upper limits. The inclusion of the gluonic contribution can change the branching ratios of $B \to ω(ϕ) η^\prime$ decays by about 10%. The direct CP-violating asymmetries for $B^0 \to ωη$ and $ωη^\prime$ decays are generally large in size.
description: 23 pages, 4 ps/eps figures, RevTex, typos removed, minor corrections
Η ευθύνη μισθωτού λόγω πλημμελούς εκπλήρωσης
Creators: name: Γιαννακέρη, Αναστασία-Αντωνία Αγγελή
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Μισθωτός-Ευθύνη
Ελαφρά αμέλεια
Employee-Responsibility
Minor negligence

description: Σκοπός της διπλωματικής εργασίας ήταν να αναφερθούν οι προϋποθέσεις ευθύνης του μισθωτού (employee) για αποζημίωση του εργοδότη του για προκληθείσες σε αυτόν ζημίες κατά την εκτέλεση της εργασίας του και οι συνέπειες αυτής κατά το άρθρο 652 ΑΚ, καθώς και να αναφερθούν οι λόγοι εκείνοι που υπαγορεύουν την ερμηνευτική προσέγγιση του άρθρου 652 ΑΚ από τη σκοπιά του μετριασμού της ευθύνης του εργαζομένου, όταν αυτός δεν βαρύνεται με δόλο και βαριά αμέλεια, αλλά από ελαφρά αμέλεια (minor negligence), για λόγους όπως: ο επιχειρηματικός κίνδυνος, η δυσαναλογία μισθού και ζημίας, η φύση της εργασίας σε συνδυασμό με τις συνθήκες τέλεσης αυτής κ.α. Επίσης, πέρα από τη δογματική θεμελίωση του μετριασμού της ευθύνης του μισθωτού, αναφέρθηκε και η νομική θεμελίωση αυτής με βάση την ένσταση της συνυπαιτιότητας (άρθρο 300ΑΚ) και την αρχή της καλής πίστης(good faith) και των συναλλακτικών ηθών (transactional morals) (άρθρο 288 ΑΚ και 281 ΑΚ), καθώς και ο ρόλος του Συντάγματος (Constitution) προς την κατεύθυνση αυτή σε συνδυασμό με το έργο του κοινού νομοθέτη και το δικαιοπλαστικό ρόλο του δικαστή.
description: The goal of the dissertation was to report the employee’s responsibility conditions for compensation to his/her employer for caused damages on his/her expense, during work and its consequences based on the article 652 Civil Code, as well as to report the reasons that dictate the explanatory approach of the article 652 Civil Code from the angle of the mitigation of the employee’s responsibility, when s/he is not burdened with deceit and severe negligence, but with minor negligence, for reasons such as: business risk, the salary and damage disproportion, the nature of the job in combination with the conditions of its execution etc. Moreover, apart from the dogmatic establishment of the employee’s responsibility mitigation, the legal establishment of this was reported based on the objection of the co-liability (article 300 Civil Code) and the principal of good faith and transactional morals (article 288 Civil Code and 281 Civil Code), as well as the role of the Constitution towards this direction in combination with the work of the common legislator and the law producing aspect of the judgment.
A Yupiaq world view : implications for cultural, educational, and technological adaptation in a contemporary world
Creators: name: Kawagley, Angayuqaq O.
Publisher: name: University of British Columbia
Year: 2008

description: This case study examines some of the cultural and educational implications of the intersection of a Western world view and a Yupiaq world view in a remote Yupiaq Eskimo village on the Kuskokwim River in southwestern Alaska. The study examines how the contemporary Yupiaq people have adapted their belief system, educational practices and subsistence lifestyle to accommodate a mix of Western and indigenous cultural traditions and technologies. It involves the documentation of Yupiaq practices in a traditional fish camp and science education in a school setting. The most important vehicle for data gathering was the role of participant-observer, because it was congruent with the way Yupiaq people learn. In addition to patient observation, emphasis was placed on document analysis, informal conversations, and interviews as the primary sources of data from the fieldwork. The study addresses the aspirations of Yupiaq people for self-determination and self-reliance by providing a pedagogical framework which attempts to meld Western and Yupiaq knowledge generation and use, based on the data gathered in the field. Special attention is given to the generation and application of scientific knowledge in a manner suited to the maintenance of Yupiaq cultural traditions and world view in a contemporary world.
Two sequences in the age-metallicity relation as seen from [C/N] abundances in APOGEE
Creators: name: Jofre, Paula
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The age-metallicity relation is fundamental to study the formation and evolution of the disk. Observations have shown that this relation has a large scatter which can not be explained by observational errors only. That scatter is hence attributed to the effects of radial migration in which stars tracing different chemical evolution histories in the disk get mixed. However, the recent study of Nissen et al. 2020, using high precision observational data of solar type stars, found two relatively tight age-metallicity relations. One sequence of older and metal-richer stars probably traces the chemical enrichment history of the inner disk while the other sequence of younger and metal-poorer stars the chemical enrichment history of the outer disk. If uncertainties in age measurements increase, these sequences mix explaining the scatter of the one relation observed in other studies. This work follows up on these results, by analysing an independent sample of red clump giants observed by APOGEE. Since ages for red giants are significantly more uncertain, the [C/N] ratios are considered as a proxy for age. This larger dataset is used to investigate these relations at different Galactic radii, finding that these distinct sequences exist only in the solar neighbourhood. The APOGEE dataset is further used to explore different abundance and kinematical planes to shed light on the nature of these populations.
description: Accepted by ApJ
Effect of Cd2+ on the Growth and Thermal Properties of K2SO4 crystal
Creators: name: Anooz, S. Bin
name: Klimm, D.
name: Schmidbauer, M.
name: Bertram, R.
name: Rossberg, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Single crystals of pure and Cd2+ doped potassium sulfate were grown from aqueous solutions by the slow evaporation technique. From nutrient solutions with a CdSO4 concentration of 4wt.% crystals containing 0.014wt.% dopant concentration could be obtained. The X-ray diffraction patterns of powdered crystals confirmed their crystal structures for both cases. Thermal analysis of pure crystals shows that the alpha-beta phase transformation peak around 580 deg C is superimposed with spurious effects, while for Cd2+ doped crystals this is not the case. The thermal hysteresis of the phase transition is 8 K for undoped K2SO4 and is reduced to 3.5 K for K2SO4:Cd2+. Compared to undoped crystals, the optical transmittance of Cd2+ doped crystals is higher.
description: 5 pages, 6 figures
Ο χρόνος ασφάλισης
Creators: name: Χατζητιμοθέου, Ιωσήφ-Λάζαρος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Χρόνος ασφάλισης
Πλασματικός χρόνος ασφάλισης
Διαδοχική ασφάλιση
Time of insurance
Fictitious time of insurance
Successive insurance

description: Στο δίκαιο της κοινωνικής ασφάλισης, ο χρόνος ασφάλισης αποτελεί το θεμέλιο για τη χορήγηση παροχών από τον ασφαλιστικό οργανισμό στον άμεσα ασφαλισμένο και στα δικαιοδόχα μέλη της οικογένειάς του (έμμεσα ασφαλισμένοι). Ειδικότερες μορφές του χρόνου ασφάλισης αποτελούν ο χρόνος πραγματικής απασχόλησης (πραγματικός χρόνος ασφάλισης), ο χρόνος κατά τον οποίο δεν υπήρξε απασχόληση αλλά για λόγους κοινωνικούς παρέχεται η δυνατότητα αναγνώρισής του (πλασματικός χρόνος ασφάλισης), ο χρόνος κατά τον οποίο δεν υπάρχει απασχόληση αλλά παρέχεται υπό προϋποθέσεις η δυνατότητα στον ασφαλισμένο να ασφαλιστεί προαιρετικά καταβάλλοντας ο ίδιος τις εισφορές (προαιρετική ασφάλιση) και ο χρόνος που αντιστοιχεί σε διαφορετικές μορφές απασχόλησης και κατά συνέπεια ασφάλισης σε ομοειδείς ασφαλιστικούς οργανισμούς (διαδοχική ασφάλιση). Με αφορμή την παραπάνω διάκριση, η παρούσα διπλωματική διατριβή άπτεται σημαντικών ζητημάτων χρόνου ασφάλισης τόσο κατά το προηγούμενο νομοθετικό καθεστώς όσο κατά το ισχύον με βάση τις διατάξεις του Νόμου 4387/2016.
description: In the field of the Law of social insurance, the time of insurance is the basis for the granting of benefits on behalf of the social insurance organizations to directly social insured people and members of their family (indirectly social insured). Specific forms of insurance periods are the time of real working time (real time of insurance), the period during that there was not employment but that period could be recognized as time of social insurance for social purposes (fictitious time of insurance), the period during that there was not occupation but the possibility of optional insurance is provided to the concerned person under circumstances by paying the contributions (optional insurance) and the period that correspondes to different forms of employment and thus different forms of social insurance in similar organizations of social insurance (successive insurance). In response to the above distinction, the present dissertation relates with important issues of the time of insurance both during the previous legislative and during the current one, according to the provisions of Law 4387/2016.
Σύνθεση και Χαρακτηρισμός Μεταλλο-Οργανικών Πλεγμάτων ως υποψήφιων φωταυγών αισθητήρων
Creators: name: Διαμαντής, Σταύρος Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Μεταλλο-Οργανικά Πλέγματα
Φωταύγεια-Αισθητήρες
Metal-Organic Frameworks
Luminesce-Sensors

description: Τα τελευταία χρόνια σημαντική προσοχή της επιστημονικής έρευνας έχει επικεντρωθεί στην σύνθεση Μέταλλο Οργανικών Πλεγμάτων (MOFs). Ο σχεδιασμός και η σύνθεση των MOFs παρουσιάζει ιδιαίτερο ενδιαφέρον λόγω του εύρους των ιδιοτήτων και εφαρμογών τους Ο οργανικός συναρμοτής 1-amino-3,7-naphthalene dicarboxylic acid επιλέχθηκε για την σύνθεση MOFs των αλκαλικών γαιών λόγω της ακαμψίας του και των ιδιοτήτων φωταύγειας που εμφανίζει. Τα MOFs αυτά εμφανίζουν μια σειρά από χαρακτηριστικά όπως ποικιλία του τρόπου συναρμογής του συναρμοτή. Οι ενώσεις αυτές εμφανίζουν ιδιότητες φθορισμού που λόγο του συναρμοτή καθώς και αξιοσημείωτη θερμική σταθερότητα. Επιπλέον στην παρούσα μεταπτυχιακή διατριβή παρουσιάζεται η μελέτη του MOR-2 ως φθορίζοντος αισθητήρα Cr(VI). Η μελέτη αυτή πραγματοποιήθηκε με πρότυπο διάλυμα K2Cr2O7 τόσο σε αποσταγμένο όσο και σε πόσιμο νερό. Επίσης πραγματοποιήθηκαν μετρήσεις με δείγμα βιομηχανικών αποβλήτων. Τέλος πραγματοποιήθηκε η σύνθεση MOF τύπου UiO-66 με τον οργανικό συναρμοτή 2-(2-(bis(pyridin-2-ylmethyl)amino)acetamido)terepthalic acid. Τα MOFs αυτά μελετήθηκαν ως φθορίζοντες αισθητήρες Zn2+. Επιπλέον, πραγματοποιήθηκε σύνθεση του συναρμοτή 2-(2-(bis(pyridin-2-ylmethyl)amino)acetamido)-biphenyl-4,4’dicarboxylic acid.
description: Over the past few years, researchers have focused significantly towards the synthesis of Metal-Organic Frameworks (MOFs). Design and synthesis of MOFs holds great interest because of the variety of their properties and applications. 1-amino-3,7-naphthalene dicarboxylic acid is the ligand we have chosen for the synthesis of alkaline earth metal ion MOFs, due to its rigidity and its luminescence properties. These MOFs show a number of unprecedented structural features, such as unique L1 coordination modes. These compounds appear ligand based luminescent properties and thermal stability. Furthermore, this master thesis presents the study of MOR-2 as fluorescent Cr(VI) sensor. This study was performed using aqueous solution of K2Cr2O7, chromium plating waste and potable Finally, the synthesis of MOFs UiO-66 type structure with 2-(2-(bis(pyridin-2-ylmethyl)amino)acetamido)terepthalic acid groups was performed. These MOFs were studied as fluorescent Zn2+ sensors. Also we synthesized the ligand 2-(2-(bis(pyridin-2-ylmethyl) amino)acetamido)-biphenyl-4,4’dicarboxylic acid.
Millimetric Properties of Gamma Ray Burst Host Galaxies
Creators: name: Priddey, R. S.
name: Tanvir, N. R.
name: Levan, A. J.
name: Fruchter, A. S.
name: Kouveliotou, C.
name: Smith, I. A.
name: Wijers, R. A. M. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present millimetre (mm) and submillimetre (submm) photometry of a sample of host galaxies of Gamma Ray Bursts (GRBs), obtained using the MAMBO2 and SCUBA bolometer arrays respectively. These observations were obtained as part of an ongoing project to investigate the status of GRBs as indicators of star formation. Our targets include two of the most unusual GRB host galaxies, selected as likely candidate submm galaxies: the extremely red (R-K approx 5) host of GRB 030115, and the extremely faint (R>29.5) host of GRB 020124. Neither of these galaxies is detected, but the deep upper limits for GRB 030115 impose constraints on its spectral energy distribution. As a framework for interpreting these data, and for predicting the results of forthcoming submm surveys of Swift-derived host samples, we model the expected flux and redshift distributions based on luminosity functions of both submm galaxies and GRBs, assuming a direct proportionality between the GRB rate density and the global star formation rate density. We derive the effects of possible sources of uncertainty in these assumptions, including an anticorrelation between GRB rate and the global average metallicity.
description: MNRAS, in press. 8 pages, 4 figures
Μελέτη της συμπεριφοράς των καταναλωτών ως προς το ελαιόλαδο
Creators: name: Κουλιούδη, Ελένη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Συμπεριφορά Καταναλωτή
Ελαιόλαδο-Θεσσαλονίκη
Consumer behavior
Olive Oil-Τhessaloniki

description: Το ελαιόλαδο, εκτός από ένα θεμελιώδες συστατικό της ελληνικής διατροφής, είναι άμεσα συνδεδεμένο με την ιστορία, τον πολιτισμό, την θρησκεία και σαφέστατα με την καλή υγεία. Η παραγωγή της ελιάς και η κατανάλωσή της είναι άρρηκτα συνδεδεμένη με την παράδοση και την οικονομία της χώρας. Στόχο της παρούσης διατριβής αποτελεί η αναφορά των παραπάνω στοιχείων και επίσης η μελέτη συμπεριφοράς των καταναλωτών ως προς το ελαιόλαδου στο πολεοδομικό συγκρότημα της Θεσσαλονίκης. Για τη διεξαγωγή της ερευνητικής εργασίας πραγματοποιήθηκαν ποιοτική και ποσοτική έρευνα. Η ποσοτική έρευνα βασίστηκε σε πρωτογενή στοιχεία τα οποία συλλέχθηκαν με τη χρήση ερωτηματολογίου, όπου με τη στατιστική επεξεργασία των στοιχείων της έρευνας προέκυψε μια σειρά συμπερασμάτων. Το ελαιόλαδο καταναλώνεται σε υψηλό ποσοστό σε καθημερινή βάση από τους Θεσσαλονικείς καταναλωτές, παρόλο που η τιμή του θεωρείται υψηλή από τους ίδιους και επίσης τα οργανοληπτικά χαρακτηριστικά αυτού αποτελούν βασική προϋπόθεση για την αγορά του προϊόντος.
description: Except for being a fundamental ingredient of the Greek nutrition, olive oil is directly connected to history, culture, religion as well as good health. Oil production and consumption are inextricably linked to the tradition and economy of a country. The aim of this thesis is to mention these elements and to study the consumers’ behavior as far as olive oil is concerned in Thessaloniki. To conduct this research project both quality and quantity research has been done. Quantity research was based on primary elements which have been collected using a questionnaire where a statistical process of data has resulted to a range of conclusions. Olive oil is consumed at a high level on a daily basis by the citizens of Thessaloniki although the price is considered to be high, what is more, the organoleptic characteristics of it are a basic requirement for the product purchase.
Origin of Abundance Inhomogeneity in Globular Clusters
Creators: name: Bekki, K.
name: Campbell, S. W.
name: Lattanzio, J. C.
name: Norris, J. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We numerically investigate abundance properties of the Galactic globular clusters (GCs) by adopting a new ``external pollution'' scenario. In this framework, GCs are assumed to originate in forming low-mass dwarfs embedded in dark matter subhalos at very high redshifts (z) and thus be chemically influenced by field AGB stars of the dwarfs during early GC formation processes. In this external pollution scenario, the ratio of the total mass of infalling gas to that of AGB ejecta during GC formation in a dwarf (s) and the time scale of gas infall (sigma_I) are the most important key parameters that can determine abundance properties of GCs. We mainly investigate the abundance inhomogeneity among light elements (e.g., C, N, O, Na, and Al) of stars in GCs by using the latest stellar yield models of metal-poor AGB stars with and without third dredge-up. Our principal results for the models with no third dredge-up, which are more consistent with observations, are as follows. Both [N/Fe] and [C/Fe] can be diverse among stars within a GC owing to chemical pollution from field AGB stars. [N/Fe] distributions in some GCs can clearly show bimodality whereas [C/Fe] is monomodal in most models. [N/Fe] distributions depend on s such that models with smaller $s$ (i.e., larger mass fraction of AGB ejecta used for GC formation) show the [N/Fe] bimodality more clearly. N-rich, C-poor stars in GCs also have higher He abundances owing to pollution from massive AGB stars with He-rich ejecta. The number fraction of He-rich stars (Y >0.30) is higher for the models with smaller s and shorter sigma_I for 3 < s <24 and 10^5 < sigma_I < 10^7 yr.Our models are in strong disagreement with the observed O-Na anticorrelation.
description: 18 pages, 17 figures, accepted by MNRAS
General-relativistic treatment of tidal $g$-mode resonances in coalescing binaries of neutron stars. I. Theoretical framework and crust breaking
Creators: name: Kuan, Hao-Jui
name: Suvorov, Arthur G.
name: Kokkotas, Kostas D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: During the final stages of a neutron-star binary coalescence, stellar quasi-normal modes can become resonantly excited by tidal fields. If the strain exerted by the excited modes exceeds the extent to which the crust can respond linearly, localised crustal failures may occur. In this work, we re-examine resonant $g$-mode excitations of relativistic neutron stars in the last $\sim$ 10 seconds of an inspiral. We adopt realistic equations of state that pass constraints from GW170817, include 3rd order post-Newtonian terms for the conservation orbital motion, and employ a 2.5 post-Newtonian scheme for gravitational back-reaction. Frequency modulations of the modes due to tidal fields, Lorentz forces, and (slow) rotation are also considered to investigate the maximal strain achievable by resonantly-excited $g$-modes. Depending on the equation of state, degree of stratification, and stellar magnetic field, we find that certain $g$-modes excitations may be able to break the crust some seconds prior to coalescence.
description: 15 pages, 11 figures, 2 tables. Matches published version in MNRAS
Localization for the Anderson Model on Trees with Finite Dimensions
Creators: name: Breuer, Jonathan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We introduce a family of trees that interpolate between the Bethe lattice and $\bbZ$. We prove complete localization for the Anderson model on any member of that family.
Risk factors to lumbar bone stress injuries and lumbar spine adaptation in elite cricket fast bowlers
Creators: name: Alway, Pete
Publisher: name: Loughborough University
Year: 2021
Subjects: subject: 119999 Medical and Health Sciences not elsewhere classified
subject: FOS: Other medical sciences

description: Risk factors to lumbar bone stress injuries and lumbar spine adaptation in elite cricket fast bowlers
Graduate Student Perceptions of Social Presence in Online Accelerated Master of Business Administration Programs
Creators: name: Cremeens, Larissa
name: Cremeens, Larissa
Publisher: name: Unknown
Year: 2024
Subjects: subject: online education
subject: accelerated learning
subject: online learning
subject: social presence
subject: MBA

description: In recent years, there has been a growing trend towards offering courses in a more accelerated online
learning format. This study inves*gates students' preferences to beRer inform faculty on whether
learner-to-learner interac*ons that build social presence should be retained when condensing online
courses. While there is research on social presence in online classes, liRle is known about student
percep*ons of social presence in online accelerated programs, such as MBA programs. This research
u*lizes the social presence ques*ons from the Community of Inquiry Framework ques*onnaire, which
was distributed to MBA program directors and leaders at mid-sized universi*es in the Midwest. The
survey results indicated that students perceived high levels of social presence in online accelerated MBA
programs surveyed. Furthermore, a moderate, posi*ve correla*on was found between high total social
presence percep*on mean total scores and high sa*sfac*on with these programs. The study also
revealed liRle difference in social presence across various demographic characteris*cs, including gender,
age, number of courses taken, hours worked in employment, and hours spent on coursework. This study
provides evidence to support that social presence is s*ll an important construct in the design,
development, and delivery of online accelerated MBA programs. This study provides valuable evidence
for best prac*ces in crea*ng online accelerated courses and programs that foster high levels of social
presence and student sa*sfac*on.
Distributed Decision Through Self-Synchronizing Sensor Networks in the Presence of Propagation Delays and Nonreciprocal Channels
Creators: name: Scutari, Gesualdo
name: Barbarossa, Sergio
name: Pescosolido, Loreto
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: In this paper we propose and analyze a distributed algorithm for achieving globally optimal decisions, either estimation or detection, through a self-synchronization mechanism among linearly coupled integrators initialized with local measurements. We model the interaction among the nodes as a directed graph with weights dependent on the radio interface and we pose special attention to the effect of the propagation delays occurring in the exchange of data among sensors, as a function of the network geometry. We derive necessary and sufficient conditions for the proposed system to reach a consensus on globally optimal decision statistics. One of the major results proved in this work is that a consensus is achieved for any bounded delay condition if and only if the directed graph is quasi-strongly connected. We also provide a closed form expression for the global consensus, showing that the effect of delays is, in general, to introduce a bias in the final decision. The closed form expression is also useful to modify the consensus mechanism in order to get rid of the bias with minimum extra complexity.
description: Conference paper. Journal version submitted to IEEE Transactions on Signal Processing, January 10, 2007. Paper accepted for the publication on the VIII IEEE Workshop on Signal Processing Advances in Wireless Communications, (SPAWC 2007), January 22, 2007