cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Grain Boundary Segregation Transitions and Critical Phenomena in Binary Regular Solutions: A Systematics of Complexion Diagrams with Universal Characters
Creators: name: Zhou, Naixie
name: Hu, Chongze
name: Luo, Jian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A systematics of grain boundary (GB) segregation transitions and critical phenomena has been derived to expand the classical GB segregation theory. Using twist GBs as an example, this study uncovers when GB layering vs. prewetting transitions should occur and how they are related to one another. Moreover, a novel descriptor, normalized segregation strength (phi_seg), is introduced. It can represent several factors that control GB segregation, including strain and bond energies, as well as misorientation for small-angle GBs (in a mean-field approximation), which had to be treated separately in prior models. In a strong segregation system with a large phi_seg, first-order layering transitions occur at low temperatures and become continuous above GB roughing temperatures. With reducing phi_seg, the layering transitions gradually merge and finally lump into prewetting transitions without quantized layer numbers, akin to Cahn's critical-point wetting model. Furthermore, GB complexion diagrams with universal characters are constructed as the GB counterpart to the classical exemplar of Pelton-Thompson regular-solution binary bulk phase diagrams.
The dynamical collision network in granular gases
Creators: name: Alvarez-Hamelin, José Ignacio
name: Puglisi, Andrea
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We dynamically construct the interaction network in a granular gas, using the sequence of collisions collected in an MD event driven simulation of inelastic hard disks from time 0 till time t. The network is decomposed into its k-core structure: particles in a core of index k have collided at least k times with other particles in the same core. The difference between cores k+1 and k is the so-called k-shell, and the set of all shells is a complete and on-overlapping decomposition of the system. Because of energy dissipation, the gas cools down: its initial spatially homogeneous dynamics, characterized by the Haff law, i.e. a t^{-2} energy decay, is unstable towards a strongly inhomogeneous phase with clusters and vortices, where energy decays as t^{-1}. The clear transition between those two phases appears in the evolution of the k-shells structure in the collision network. In the homogeneous regime the k-shell structure evolves as in a growing network with fixed number of vertices and randomly added links: the shell distribution is strongly peaked around the most populated shell, which has an index k_{max} ~ 0.9 with the average number of collisions experienced by a particle. During the final non-homogeneous regime a growing fraction of collisions is concentrated in small, almost closed, 'communities' of particles: k_{max} is no more linear in and the distribution of shells becomes extremely large developing a power-law tail ~ k^{-3} for high shell indexes. We propose the k-shell decomposition as a quantitative characterization of Molecular Chaos violation.
Decision theory and information propagation in quantum physics
Creators: name: Forrester, Alan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: In recent papers, Zurek has objected to the decision-theoretic approach of Deutsch and Wallace to deriving the Born rule for quantum probabilities on the grounds that it courts circularity. Deutsch and Wallace assume that the many worlds theory is true and that decoherence gives rise to a preferred basis. However, decoherence arguments use the reduced density matrix, which relies upon the partial trace and hence upon the Born Rule for its validity. Using the Heisenberg Picture and quantum Darwinism - the notion that classical information is quantum information that can proliferate in the environment pioneered by Olliver et al - I show that measurement interactions between two systems only create correlations between a specific set of commuting observables of system 1 and a specific set of commuting observables of system 2. This argument picks out a unique basis in which information flows in the correlations between those sets of commuting observables. I then derive the Born rule for both pure and mixed states and answer some other criticisms of the decision theoretic approach to quantum probability.
description: minor corrections, to appear in Studies in the History and Philosophy of Modern Physics, 35 pages
Empiric risk to first-degree relatives of Alzheimer disease patients
Creators: name: Hirst, Clinton G.
Publisher: name: University of British Columbia
Year: 2008

description: Kaplan-Meier risk estimates were generated and evaluated for 1867 first-degree relatives of 338 Alzheimer Disease (AD) index cases and 1873 first-degree relativesof 351 non-cognitively impaired, non-demented elderly controls. A cumulative lifetime risk of 26.73 ± 4.42% for first-degree relatives of AD cases, while significantly higher than the cumulative lifetime risk of 7.26 ± 2.74% found for first-degree relatives of controls, does not suggest that all cases of AD are due to a single autosomal dominant gene(s), but is evidence that a genetic component to the etiologyof the disease exists. Female and male first-degree relatives of AD cases as well as parents and sibs of AD cases showed higher cumulative risks throughout their lifetimes when compared to their analogous control subgroups. Equal cumulative lifetime risks between first-degree female and male relatives (28.97 ± 3.60%, 22.03 ±8.29%) and between parents and sibs (27.67 ± 4.50%, 28.87 ± 8.92%) of AD cases, but significantly different lifetime risk curves suggest that non-genetic factors may affect the age-specific expression of AD in individuals with an identical genetic propensity. Equal risk between first-degree relatives of early-onset and late-onset AD cases does not support the suggestion that relatives of early-onset cases share a higher risk to develop the disease. These results are interpreted as being suggestive of a complex etiology with both genetic and environmental factors, as well as interactions between the two playing a role in AD expression.
5G Δίκτυα και Υγεία
Creators: name: Παπαδόπουλος, Χαρίλαος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: 5G
Δίκτυα
Υγεία
Networks
Health

description: Η ασύρματη τεχνολογία των δικτύων αποτελεί πολύτιμο εργαλείο στην καθημερινότητα όλων και για τον λόγο αυτό υπάρχει η ανάγκη ανάπτυξης και βελτιστοποίησης της υπάρχουσας υποδομής, καθώς και η ανάγκη εισαγωγή νέας ώστε να καλυφθούν οι σύγχρονες απαιτήσεις. Παρατηρείται εξέλιξη των χαρακτηριστικών των ασύρματων δικτύων επικοινωνίας στο πέρασμα των τελευταίων ετών, από την δεκαετία του 1980 με την πρώτη γενιά έως και σήμερα που έχει κάνει την εμφάνιση της η πέμπτη γενιά. Αναδεικνύονται οι διαφορές των γενιών δικτύων σχετικά με την ταχύτητα, την καθυστέρηση και το εύρος ζώνης, τόσο ανάμεσα στην τρίτη με την τέταρτη όσο και στην τέταρτη με την πέμπτη. Τα πλεονεκτήματα της 5G γενιάς αναμένεται να συνεισφέρουν σημαντικά στον τομέα της υγείας παρέχοντας βελτιωμένες δυνατότητες στους επαγγελματίες υγείας και στις ιατρικές υποδομές (ασθενοφόρα, νοσοκομεία, κ.α) καθώς προβλέπεται γρηγορότερη αντιμετώπιση επειγόντων περιστατικών με μεγαλύτερη ασφάλεια και αποτελεσματικότητα. Ωστόσο η ακτινοβολία που εκπέμπεται από τα 5G δίκτυα πρόκειται να προκαλέσει διφορούμενες απόψεις σχετικά με τις επιδράσεις στην υγεία και στο ανθρώπινο σώμα και για το λόγο αυτό απαιτούνται περεταίρω έρευνες. Υπάρχουν ήδη αναφορές σχετικά με τεχνικές μείωσης της ακτινοβολίας ακολουθώντας τα όρια έκθεσης στην ακτινοβολούμενη ενέργεια που τίθενται από διεθνείς αναγνωρισμένους οργανισμούς για την προστασία του ανθρώπινου ιστού και την αποφυγή αρνητικών επιδράσεων σε αυτό.
description: Wireless network technology is a valuable tool in everyone's daily life and for this reason there is a need to develop and optimize the existing infrastructure, as well as the need to introduce new ones to meet modern requirements. The characteristics of wireless communication networks have evolved over the last few years, from the 1980s with the first generation until today when the fifth generation has emerged. The differences between the generations of networks in terms of speed, latency and bandwidth, both between the third and the fourth and the fourth with the fifth, are highlighted. The advantages of the 5G generation are expected to contribute significantly to the health sector by providing improved opportunities to health professionals and medical infrastructure (ambulances, hospitals, etc.) as faster response to time-critical emergencies are provided with greater safety and efficiency. However, the radiation emitted by the 5G networks is going to cause ambiguous views on the human health effects and therefore further research is needed. There are already reports of radiation reduction techniques following the limits of exposure to radiation set by internationally recognized organizations for the protection of human tissue and the avoidance of adverse effects on it.
Neutrino emissivities in 2SC color-superconducting quark matter
Creators: name: Berdermann, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The phase structure and equation of state for two-flavor quark matter under compact star constraints is studied within a nonlocal chiral quark model. Chiral symmetry breaking leads to rather large, density dependent quark masses at the phase transition to quark matter. The influence of diquark pairing gaps and quark masses on density dependent emissivities for the direct URCA is discussed. Since m_u>m_d, the direct URCA process due to quark masses cannot occur. We present cooling curves for model quark stars and discuss their relation to observational data.
description: 6 pages, 4 figures
Quantum loops in radiative decays of the $a_1$ and $b_1$ axial-vector mesons
Creators: name: Roca, L.
name: Hosaka, A.
name: Oset, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A previous model where the low-lying axial-vector mesons are dynamically generated, implementing unitarity in coupled channels in the vector-pseudoscalar ($VP$) meson interaction, is applied to evaluate the decay widths of the a_1(1260)$ and $b_1(1235)$ axial-vector mesons into $πγ$. Unlike the case of the $a_1$, the $b_1$ radiative decay is systematically underestimated at tree level. In this work we evaluate for the first time the loop contribution coming from an initial $VP$ vertex. Despite the large superficial divergence of the loops, the convergence of the relevant loops can be established by using arguments of gauge invariance. The partial decay widths obtained agree very well with the experimental values within uncertainties, and show that the loop contribution is crucial in the $b_1$ case and also important for the $a_1$ case.
description: 16 pages, 4 figurs Added extra discussion
Vibrational effects in the quantum dynamics of the H + D_2^+ charge transfer reaction
Creators: name: Roncero, O.
name: Andrianarijaona, V.
name: Aguado, A.
name: Sanz-Sanz, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The H + D_2^+(v=0,1 and 2) charge transfer reaction is studied using an accurate wave packet method, using recently proposed coupled diabatic potential energy surfaces. The state-to-state cross section is obtained for three different channels: non-reactive charge transfer, reactive charge transfer, and exchange reaction. The three processes proceed via the electronic transition from the first excited to the ground electronic state. The cross section for the three processes increases with the initial vibrational excitation. The non-reactive charge transfer process is the dominant channel, whose branching ratio increases with collision energy, and it compares well with experimental measurements at collision energies around 0.5 eV. For lower energies the experimental cross section is considerably higher, suggesting that it corresponds to higher vibrational excitation of D_2^+(v) reactants. Further experimental studies of this reaction and isotopic variants are needed, where conditions are controlled to obtain a better analysis of the vibrational effects of the D_2^+ reagents.
description: 15 pages, 7 figures
Οι απόψεις των δασκάλων αγγλικής γλώσσας για τις δυσκολίες που συναντούν σε μαθητές με μαθησιακές δυσκολίες
Creators: name: Κύρβεη, Μαρία-Χριστίνα Ευάγγελου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Μαθησιακές δυσκολίες
Απόψεις εκπαιδευτικών
Διδασκαλία της αγγλικής ως ξένη γλώσσα
Learning difficulties
Teacher beliefs
Teaching English as a foreign language

description: Η παρούσα διπλωματική εργασία έχει ως σκοπό την εξέταση των στάσεων και απόψεων των καθηγητών αγγλικής γλώσσας σχετικά με τις δυσκολίες που αντιμετωπίζουν μαθητές με μαθησιακές δυσκολίες στο μάθημα των Αγγλικών. Στην έρευνα συμμετείχαν 55 εκπαιδευτικοί αγγλικής γλώσσας και από τις δύο βαθμίδες εκπαίδευσης από διάφορες εκπαιδευτικές περιφέρειες της χώρας συμπληρώνοντας ερωτηματολόγιο τρίβαθμης κλίμακας Likert. Οι μαθητές που έπρεπε να λάβουν υπ’ όψη τους είναι άνω των έντεκα ετών και πρέπει να έχουν παρακολουθήσει το μάθημα των αγγλικών τουλάχιστον δύο χρόνια στο δημοτικό. Τα αποτελέσματα της έρευνας καταδεικνύουν πως σε μεγάλο βαθμό οι εκπαιδευτικοί είναι σε θέση να κατανοήσουν ποιος είναι ο μαθητής με μαθησιακές δυσκολίες. Οι περισσότεροι φαίνεται να εντοπίζουν δυσκολίες στη συγκέντρωση, την επεξεργασία και την κατανόηση του προφορικού και γραπτού λόγου, ενώ έμφαση δίνουν στη διδασκαλία τεχνικών και στρατηγικών ως τρόπο διευκόλυνσης της μαθησιακής διαδικασίας. Η προσπάθεια δημιουργίας κινήτρων και η τόνωση της αυτοπεποίθησης αναφέρθηκαν επίσης από μερίδα των εκπαιδευτικών.
description: The present thesis aims to look into the beliefs and attitudes of teachers of English concerning the difficulties faced by students with learning difficulties. The research sample consists of 55 teachers of English and was conducted through means of a questionnaire containing statements that were measured on a three-point Likert scale. To answer the questions, the teachers had to consider students of eleven years of age or older who had attended English lessons at school for a minimum of two years. The study has demonstrated that teachers are able to point out who the student with learning difficulties is to a considerable extent. Most seem to detect difficulties in focus, processing and comprehension of oral and written speech. Emphasis is given on teaching strategies as a way to facilitate learning. The necessity of creating incentives and boosting students’ self-confidence has also been raised by a number of teachers.
Media Art Archiving on Wikimedia Projects
Creators: name: Borgonovo, Chiara
Publisher: name: Zenodo
Year: 2025
Subjects: Media Art
Archiving
MediaWiki
Wikimedia projects

description: This presentation was delivered as a lightning talk at ZKM Karlsruhe on Thursday, February 6, 2025, as part of the Workshop on New Media Art Archiving. It explores the challenges faced by small and medium-sized cultural organizations in connecting with larger ecosystems for open heritage knowledge. It also provides the outline of a blueprint for archiving media art on Wikimedia projects and/or private instances of the MediaWiki software. Developed by an international group of experts, the blueprint aims to provide clear guidelines for sustainable collaboration and resource sharing. It is currently in progress and will be published as an open resource.
Short-range correlations in quark matter
Creators: name: Froemel, Frank
name: Leupold, Stefan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the role of short-range correlations in quark matter within the framework of the SU(2) NJL model. Employing a next-to-leading order expansion in 1/N_c for the quark self energy we construct a fully self-consistent model that is based on the relations between spectral functions and self energies. In contrast to the usual quasiparticle approximations we take the collisional broadening of the quark spectral function consequently into account. Mesons are dynamically generated in the fashion of a random phase approximation, using full in-medium propagators in the quark loops. The results are self-consistently fed back into the quark self energy. Calculations have been performed for finite chemical potentials at zero temperature. The short-range correlations do not only generate finite widths in the spectral functions but also have influence on the chiral phase transition.
description: 40 pages, 23 figures; revised and extended paper, accepted for publication in Phys. Rev. C
How to build Hamiltonians that transport noncommuting charges in quantum thermodynamics
Creators: name: Halpern, Nicole Yunger
name: Majidy, Shayan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Noncommuting conserved quantities have recently launched a subfield of quantum thermodynamics. In conventional thermodynamics, a system of interest and an environment exchange quantities -- energy, particles, electric charge, etc. -- that are globally conserved and are represented by Hermitian operators. These operators were implicitly assumed to commute with each other, until a few years ago. Freeing the operators to fail to commute has enabled many theoretical discoveries -- about reference frames, entropy production, resource-theory models, etc. Little work has bridged these results from abstract theory to experimental reality. This paper provides a methodology for building this bridge systematically: We present a prescription for constructing Hamiltonians that conserve noncommuting quantities globally while transporting the quantities locally. The Hamiltonians can couple arbitrarily many subsystems together and can be integrable or nonintegrable. Our Hamiltonians may be realized physically with superconducting qudits, with ultracold atoms, and with trapped ions.
description: 6.5 pages + appendices. Version accepted by npj Quantum Information
práticas de ciência aberta dos periódicos científicos correntes da Biblioteca Digital de Periódicos da Universidade Federal do Paraná
Creators: name: Araújo, Paula
name: Führ, Fabiane
name: Lima, Karolayne Costa Rodrigues De
name: Zulpo, Suzana
Publisher: name: Cadernos BAD
Year: 2022

description: Compreende a ciência aberta como movimento de abertura e transparência do processo de comunicação científica e os periódicos científicos são atores importantes nesse contexto. Objetiva conhecer o status das práticas de Ciência Aberta nos periódicos científicos correntes da Biblioteca Digital de Periódicos da Universidade Federal do Paraná sob a perspectiva dos seus editores. Desenvolve uma pesquisa exploratória, quantitativa e qualitativa com aplicação do questionário como instrumento de coleta de dados para avaliar as práticas da Ciência Aberta adotadas pelos editores científicos quanto às dimensões de: publicações em acesso aberto, gestão de dados científicos de pesquisa, revisão aberta por pares, licenciamento do conteúdo, a adoção de métricas alternativas e aceitação de preprints. O acesso aberto, o uso de licenças Creative Commons e as métricas alternativas são as práticas de ciência aberta mais comuns para os periódicos científicos da UFPR. A análise do grau de importância atribuído pelos editores evidencia que os editores são reticentes em relação às práticas de aceite de preprints, revisão por pares aberta e publicação de artigos de dados. Há espaço para as equipes editoriais e os gestores da biblioteca digital explorarem de forma mais direta as práticas de ciência aberta.
description: Cadernos BAD, N.º 1-2 (2021): Atas da 12ª Conferência Luso-Brasileira de Ciência Aberta (ConfOA)
MAKTABGACHA VA BOSHLANG'ICH TA'LIM JARAYINIDA UZVIYLIKNI TA'MINLASHGA DOIR METODIK TA'MINOT.
Creators: name: SHaripova, Hanifa
Publisher: name: Zenodo
Year: 2023

description: Maktabgacha ta`lim muassasasi ishini rejalashtirishning nazariy asoslari, ta`lim – tarbiyaning maqsadi, mazmuni, shaxsni barkamollikka etaklovchi omillar, jamoada sog’lom muhitni yaratish quyidagi tezisimizning asosi sanaladi.
Trust in Early Recordings: documents, performances, works
Creators: name: Stanović, Adam
Publisher: name: University of the Arts London
Year: 2024
Subjects: classificationCode: 369999
subject: Other creative arts and writing not elsewhere classified

description: Trust in Early Recordings: documents, performances, works
Conference Presentation
Jan 2023
Adam Stanović
At Vocal Recordings and New Beginnings Symposium, City University of LondonAn AHRC-funded research network Redefining Early Recordings as Sources for Performance Practice and History event
Breakdown of the local density approximation in interacting systems of cold fermions in strongly anisotropic traps
Creators: name: Imambekov, Adilet
name: Bolech, C. J.
name: Lukin, Mikhail
name: Demler, Eugene
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider spin-polarized mixtures of cold fermionic atoms on the BEC side of the Feshbach resonance. We demonstrate that a strongly anisotropic confining potential can give rise to a double-peak structure in the axial distribution of the density difference and a polarization-dependent aspect ratio of the minority species. Both phenomena appear as a result of the breakdown of the local density approximation for the phase-separated regime. We speculate on the implications of our findings for the unitary regime.
description: Final published version
Ο πολιτιστικός και θρησκευτικός τουρισμός στην Π.Ε. Κοζάνης
Creators: name: Φασνάκης, Άγγελος Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Πολιτιστικός τουρισμός
Θρησκευτικός τουρισμός
Κοζάνη
Cultural tourism
Religious tourism
Kozani

description: Στην παρούσα εργασία διερευνάται, καταγράφεται και αναδεικνύεται η πολιτιστική και θρησκευτική τουριστική δυναμική της Περιφερειακής Ενότητας Κοζάνης. Αρχικά γίνεται αναφορά στη θεωρία που έχει αναπτυχθεί για το φαινόμενο του τουρισμού και αναλύονται οι έννοιες του πολιτιστικού και θρησκευτικού τουρισμού. Στην συνέχεια γίνεται μια ιστορική αναδρομή της Περιφερειακής Ενότητας Κοζάνης (και της πόλης της Κοζάνης) και παρουσιάζονται τα τοπικά τουριστικά θέλγητρα (τουριστικό προϊόν), καθώς επίσης και εναλλακτικές μορφές τουρισμού που περιλαμβάνει η εν λόγω περιοχή. Ακολουθεί παρουσίαση των βασικών πυλώνων του πολιτιστικού (Ιστορικό - Λαογραφικό Μουσείο και Μουσείο Φυσικής Ιστορίας Κοζάνης, Αρχαιολογικό Μουσείο Αιανής, Απόκριες στην Κοζάνη, Βυζαντινό Κάστρο των Σερβίων) και του θρησκευτικού τουρισμού (Ιερά Μονή Παναγίας Μικροκάστρου, Ιερά Μονή Μεταμορφώσεως του Σωτήρος Δρυόβουνου, Ιερά Μονή Αγίας Τριάδας Βυθού, Ιερός Ναός Αγίου Νικολάου Κοζάνης) της περιοχής. Τέλος, παρουσιάζονται στατιστικά στοιχεία που αφορούν την τουριστική κίνηση και διατυπώνονται προτάσεις προκειμένου να αξιοποιηθεί καλύτερα ο πολιτιστικός και θρησκευτικός τουρισμός της Περιφερειακής Ενότητας Κοζάνης.
description: In this project, the cultural and religious tourism potential of the Regional Unit of Kozani is being searched for, recorded and brought out. At first, the developed theory of the tourism phenomenon is discussed and also the concepts of cultural and religious tourism are analyzed. Next, a throwback to the history of the Regional Unit of Kozani (including the city of Kozani) is presented as well as the tourist attractions (tourist product) along with the alternative forms of tourism which characterize this particular region. Then follows a presentation of the major pillars of the cultural tourism (Historical - Folklore and Natural History Museum of Kozani, Archaeological Museum of Aiani, Carnival of Kozani, Byzantine Castle of Serbia) and also the religious tourism of the region (Holy Monastery of Panagia of Mikrokastro, Holy Monastery of the Transfiguration of the Savior in Driovouno, Holy Monastery of Holy Trinity in Vythos, Holy Church of Agios Nikolaos in Kozani). Eventually, statistics related to tourism activity are presented and recommendations are also made as to the optimal utilization of the cultural and religious tourism potential of the Regional Unit of Kozani.
Time-resolved diffraction and photoelectron spectroscopy investigation of the reactive molecular beam epitaxy of $\mathrm{Fe_3O_4}$ ultrathin films
Creators: name: Pohlmann, Tobias
name: Hoppe, Martin
name: Thien, Jannis
name: Dey, Arka Bikash
name: Alexander, Andreas
name: Ruwisch, Kevin
name: Gutowski, Olof
name: Röh, Jan
name: Gloskovskii, Andrei
name: Schlueter, Christoph
name: Küpper, Karsten
name: Wollschläger, Joachim
name: Bertram, Florian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present time-resolved high energy x-ray diffraction (tr-HEXRD), time-resolved hard x-ray photoelectron spectroscopy (tr-HAXPES) and time-resolved grazing incidence small angle x-ray scattering (tr-GISAXS) data of the reactive molecular beam epitaxy (RMBE) of $\mathrm{Fe_3O_4}$ ultrathin films on various substrates. Reciprocal space maps are recorded during the deposition of $\mathrm{Fe_3O_4}$ on $\mathrm{SrTiO_3(001)}$, MgO(001) and NiO/MgO(001) in order to observe the temporal evolution of Bragg reflections sensitive to the octahedral and tetrahedral sublattices of the inverse spinel structure of $\mathrm{Fe_3O_4}$. A time delay between the appearance of rock salt and spinel-exclusive reflections reveals that first, the iron oxide film grows with $\mathrm{Fe_{1-δ}O}$ rock salt structure with exclusive occupation of octahedral lattice sites. When this film is 1.1$\,$nm thick, the further growth of the iron oxide film proceeds in the inverse spinel structure, with both octahedral and tetrahedral lattice sites being occupied. In addition, iron oxide on $\mathrm{SrTiO_3(001)}$ initially grows with none of these structures. Here, the formation of the rock salt structure starts when the film is 1.5$\,$nm thick. This is confirmed by tr-HAXPES data obtained during growth of iron oxide on $\mathrm{SrTiO_3(001)}$, which demonstrate an excess of $\mathrm{Fe^{2+}}$ cations in growing films thinner than 3.2$\,$nm. This rock salt phase only appears during growth and vanishes after the supply of the Fe molecular beam is stopped. Thus, it can be concluded the rock salt structure of the interlayer is a property of the dynamic growth process. The tr-GISAXS data link these structural results to an island growth mode of the first 2-3$\,$nm on both MgO(001) and $\mathrm{SrTiO_3(001)}$ substrates.
description: 10 pages, 8 figures
acesso (i)legal à informação científica
Creators: name: Ferreira, Beatriz
name: Borges, Maria Manuel
name: Leitão, Helena
Publisher: name: Cadernos BAD
Year: 2022

description: O acesso à informação científica é essencial para a produção de novo conhecimento. O acesso à informação atualmente disponível na Internet/World Wide Web, parte da qual se encontra em Acesso Aberto (AA), tem sido fortalecido com a implementação de iniciativas que contribuem para a abertura da ciência sob o chapéu de chuva da Ciência Aberta. Paralelamente a estas iniciativas, surgiram formas ilegítimas e ilegais de aceder às publicações científicas, as quais entram em conflito com os esforços realizados em torno da consolidação do AA, por um lado, e, por outro lado, podem trazer graves prejuízos para os utilizadores. As bibliotecas das Instituições de Ensino Superior (IES) devem prestar atenção a estas questões e procurar sensibilizar os seus utilizadores para as ameaças e consequências na utilização de acesso ilegal à informação nas suas instituições. Neste sentido, através de uma revisão da literatura, pretende-se salientar o contributo dos bibliotecários de IES para a importância do acesso ético e legal à informação científica.
description: Cadernos BAD, N.º 1-2 (2021): Atas da 12ª Conferência Luso-Brasileira de Ciência Aberta (ConfOA)
Sublattice addressing and spin-dependent motion of atoms in a double-well lattice
Creators: name: Lee, P. J.
name: Anderlini, M.
name: Brown, B. L.
name: Sebby-Strabley, J.
name: Phillips, W. D.
name: Porto, J. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We load atoms into every site of an optical lattice and selectively spin flip atoms in a sublattice consisting of every other site. These selected atoms are separated from their unselected neighbors by less than an optical wavelength. We also show spin-dependent transport, where atomic wave packets are coherently separated into adjacent sites according to their internal state. These tools should be useful for quantum information processing and quantum simulation of lattice models with neutral atoms.
Hard gluon evolution in warming medium
Creators: name: Ben, F. G.
name: Machado, M. V. T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We describe the energy distribution of hard gluons travelling through a dense quark-gluon plasma whose temperature increases linearly with time, within a probabilistic perturbative approach. The results were applied to the thermalization problem in heavy ion collisions, in the third stage of the bottom-up picture, to estimate the initial time for the third stage of the bottom-up scenario. We then look at the entropy density and average temperature of the soft thermal bath, as the system approaches (local) thermal equilibrium.
description: 6 pages, 5 figures; corrected for updated references and acknowledgements
A re-examination of two major bankruptcy prediction models
Creators: name: Jin, Ming
Publisher: name: University of British Columbia
Year: 2008

description: This thesis examines two major bankruptcy prediction models existing in the literature: Altman's Z-score model and Ohlson's probabilistic model. The objective is to test whether the model parameters have changed from what they were when Altman and Ohlson originally estimated their models. Two reasons for expecting the parameter change are examined: (i) the change in U.S. bankruptcy law in the 1970s; and (ii) the increased use of financial leverage in the 1980s. The first portion of this thesis reviews the bankruptcy prediction literature and discusses the change in U.S. bankruptcy law and capital structure. The evidence presented in this study indicates that business failures have increased since 1980 and financial leverage follows an upward trend from the 1970s to the 1980s. The following four hypotheses associated with the original Altman and Ohlson models are developed: (1) the Type-I Error Hypothesis: the change in U.S. bankruptcy law in the 1970s increases the Type-I (classifying bankrupt firms as nonbankrupt)error rate; (2) the Type-II Error Hypothesis: the increased use ofleverage in the 1980s increases the Type-II (classifying nonbankrupt firms as bankrupt) error rate; (3) the Intercept Hypothesis: the change in the bankruptcy law in the 1970s will cause a significant increase in the intercept in Ohlson's model;and (4) the Leverage Hypothesis: the increased use of leverage in the 1980s will result in a significant decrease in the coefficient on TLTA (total liabilities /total assets) in Ohlson's model. The remaining portion of the thesis discusses sample design and tests the four hypotheses. Two samples from the 1980s are examined: a paired sample of 99 bankrupt and 99 nonbankrupt firms; and a sample of 99 bankrupt firms and 1,980 nonbankrupt firms. Using these samples, the predictive abilities of Altman's and Ohlson's models are examined and the models are re-estimated to test the four hypotheses. For Altman's model, the empirical results are consistent with the Type-II Error Hypothesis but inconsistent with the Type-I Error Hypothesis. For Ohlson's model, the results are also consistent with the Type-II Error Hypothesis but inconsistent with the Type-I Error Hypothesis. While the empirical results of re-estimating Ohlson's model support the Leverage Hypothesis, they do not support the Intercept Hypothesis.
Generation of two-mode entanglement between separated cavities
Creators: name: Li, Pengbo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a scheme for the generation of two-mode entangled states between two spatially separated cavities. It utilizes a two-level atom sequentially coupling to two high-Q cavities with a strong classical driving field. It is shown that by suitably choosing the intensities and detunings of the fields and coherent control of the dynamics, several different entangled states such as entangled coherent states and Bell states can be produced between the modes of the two cavities.
description: 4pages,1figure
IC MAGE Model 01 – strain-hardening/softening Mohr-Coulomb failure criterion with isotropic small strain stiffness
Creators: name: Taborda, David M G
name: Kontoe, Stavroula
name: Tsiampousi, Aikaterini
Publisher: name: Zenodo
Year: 2021
Subjects: Geotechnical Analysis
Finite Element Analysis
Constitutive Modelling
Geotechnical Engineering
Small-strain stiffness

description: IC MAGE M01 is a user-defined model for PLAXIS built using the IC MAGE UMIP framework which combines a strain-hardening/softening Mohr-Coulomb failure criterion based on the deviatoric plastic strain with the IC.G3S (Taborda et al., 2016) isotropic small strain stiffness model. It allows for the generation of hysteresis (and energy dissipation) by adopting a cyclic nonlinear elastic framework.
description: {"references": ["Taborda, David M G, Kontoe, Stavroula, & Tsiampousi, Aikaterini. (2021, June 23). IC MAGE UMIP - universal model interface for PLAXIS (Version 2.0). Zenodo. http://doi.org/10.5281/zenodo.5018865"]}
Is Torsion a Fundamental Physical Field?
Creators: name: Lecian, Orchidea Maria
name: Mercuri, Simone
name: Montani, Giovanni
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The local Lorentz group is introduced in flat space-time, where the resulting Dirac and Yang-Mills equations are found, and then generalized to curved space-time: if matter is neglected, the Lorentz connection is identified with the contortion field, while, if matter is taken into account, both the Lorentz connection and the spinor axial current are illustrated to contribute to the torsion of space-time.
description: 3 pages, proceedings of the XI Marcel Grossmann meeting on Relativistic Astrophysics, July 23-29, 2006, Berlin
Large format imaging spectrograph for the Large Submillimeter Telescope (LST)
Creators: name: Kohno, K.
name: Kawabe, R.
name: Tamura, Y.
name: Endo, A.
name: Baselmans, J. J. A.
name: Karatsu, K.
name: Inoue, A. K.
name: Moriwaki, K.
name: Hayatsu, N. H.
name: Yoshida, N.
name: Yoshimura, Y.
name: Hatsukade, B.
name: Umehata, H.
name: Oshima, T.
name: Takekoshi, T.
name: Taniguchi, A.
name: Klaassen, P. D.
name: Mroczkowski, T.
name: Cicone, C.
name: Bertoldi, F.
name: Dannerbauer, H.
name: Tosaki, T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present a conceptual study of a large format imaging spectrograph for the Large Submillimeter Telescope (LST) and the Atacama Large Aperture Submillimeter Telescope (AtLAST). Recent observations of high-redshift galaxies indicate the onset of earliest star formation just a few 100 million years after the Big Bang (i.e., z = 12--15), and LST/AtLAST will provide a unique pathway to uncover spectroscopically-identified first forming galaxies in the pre-reionization era, once it will be equipped with a large format imaging spectrograph. We propose a 3-band (200, 255, and 350 GHz), medium resolution (R = 2,000) imaging spectrograph with 1.5 M detectors in total based on the KATANA concept (Karatsu et al. 2019), which exploits technologies of the integrated superconducting spectrometer (ISS) and a large-format imaging array. A 1-deg2 drilling survey (3,500 hr) will capture a large number of [O III] 88 um (and [C II] 158 um) emitters at z = 8--9, and constrain [O III] luminosity functions at z > 12.
description: Presented at SPIE Astronomical Telescopes + Instrumentation 2020. Full published paper and video available at http://dx.doi.org/10.1117/12.2561238 See also https://www.lstobservatory.org for the LST project
Πρόταση Μουσειοσκευής «Ολυμπιακοί Αγώνες Αθήνα 1896 και Αθήνα 2004»
Creators: name: Τσελέπη, Χριστίνα Σταματίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020

description: Αντικείμενο της Διπλωματικής εργασίας είναι ο Μουσειοπαιδαγωγικός Σχεδιασμός μιας μουσειοσκευής για το Ολυμπιακό Μουσείο Θεσσαλονίκης με τίτλο «Ολυμπιακοί Αγώνες Αθήνα 1896 και Αθήνα 2004». Η συγκεκριμένη μουσειοσκευή, με τη χρήση ποικίλου εκπαιδευτικού υλικού, που περικλείει, προσπαθεί να εμπλέξει τους μαθητές και τις μαθήτριες, της Δ’, Ε’ και ΣΤ’ Δημοτικού, στους οποίους απευθύνεται, σε μία διαδικασία μάθησης μέσω βιωματικών, διαθεματικών και διαδραστικών δράσεων. Σκοπός της μουσειοβαλίτσας είναι τα αντικείμενά της να λειτουργήσουν ως έναυσμα και ερέθισμα δημιουργικότητας, φαντασίας και έρευνας. Μέσω των δράσεων, δίνεται στους μαθητές και στις μαθήτριες η ευκαιρία να επεξεργαστούν πληροφορίες για τους σύγχρονους Ολυμπιακούς Αγώνες, που πραγματοποιήθηκαν στη χώρα τους, ενώ, παράλληλα, μπορούν να γνωρίσουν και κάποιες κοινωνικές προεκτάσεις αυτών. Θετικό στοιχείο, άλλωστε των μουσειοσκευών είναι η ευελιξία που παρέχουν στους/στις εκπαιδευτικούς να επιλέξουν και άλλες δράσεις πέραν των προτεινόμενων, που υπάρχουν στη μουσειοσκευή. Για τις ανάγκες του θέματος, γίνεται στη συγκεκριμένη εργασία μία αναδρομή στην ιστορία των μουσείων έως την ανάδειξή τους σε εκπαιδευτικούς φορείς και την συμπερίληψή τους ανάμεσα στους χώρους ψυχαγωγίας, εξετάζεται η ιστορία της μουσειοσκευής από τις απαρχές της και πραγματοποιήθηκε έρευνα αναφορικά με τις εν χρήση μουσειοσκευές στην Ελλάδα και στους φορείς που τις διαθέτουν.
description: The subject of the following Thesis is the Museum Pedagogical Design of a museum kit for the Olympic Museum of Thessaloniki entitled “Olympic Games Athens 1896 and Athens 2004”. This particular museum kit, with the use of a variety of educational material, focuses on involving the students of the 4th, 5th and 6th grade of primary school in a learning process. This process consists of experiential, interdisciplinary and interactive activities. The purpose of the museum kit is to function as a stimulus for creativity, imagination and research. Through the activities, students are given the opportunity to process information about the modern Olympic Games which took place in their country, while simultaneously they can learn about their social implications. Moreover, one of the positives of the museum kits is the flexibility that provide to the teacher to create new activities other than those suggested in the kit. This Thesis contains a review of the history of museums until their emergence as educational institutions and their inclusion among the entertainment venues. The history of the museum kit is examined and research is conducted regarding the museum kits in use in Greece and the institutions where they belong.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
IC MAGE Model 01 – strain-hardening/softening Mohr-Coulomb failure criterion with isotropic small strain stiffness
Creators: name: Taborda, David M G
name: Kontoe, Stavroula
name: Tsiampousi, Aikaterini
Publisher: name: Zenodo
Year: 2022
Subjects: Geotechnical Analysis
Finite Element Analysis
Constitutive Modelling
Geotechnical Engineering
Small-strain stiffness

description: IC MAGE M01 is a user-defined model for PLAXIS built using the IC MAGE UMIP framework which combines a strain-hardening/softening Mohr-Coulomb failure criterion based on the deviatoric plastic strain with the IC.G3S (Taborda et al., 2016) isotropic small strain stiffness model. It allows for the generation of hysteresis (and energy dissipation) by adopting a cyclic nonlinear elastic framework.
Non-BCS superfluidity in trapped ultracold Fermi gases
Creators: name: Jensen, L. M.
name: Kinnunen, J.
name: Torma, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Superconductivity and superfluidity of fermions require, within the BCS theory, matching of the Fermi energies of the two interacting Fermion species. Difference in the number densities of the two species leads either to a normal state, to phase separation, or - potentially - to exotic forms of superfluidity such as FFLO-state, Sarma state or breached pair state. We consider ultracold Fermi gases with polarization, i.e. spin-density imbalance. We show that, due to the gases being trapped and isolated from the environment in terms of particle exchange, exotic forms of superfluidity appear as a shell around the BCS-superfluid core of the gas and, for large density imbalance, in the core as well. We obtain these results by describing the effect of the trapping potential by using the Bogoliubov-de Gennes equations. For comparison to experiments, we calculate also the condensate fraction, and show that, in the center of the trap, a polarized superfluid leads to a small dip in the central density difference. We compare the results to those given by local density approximation and find qualitatively different behavior.
description: Extended and revised, 13 pages, 13 figures
Δημιουργία και αξιολόγηση διαδραστικού διδακτικού περιεχομένου για τη Δευτεροβάθμια Εκπαίδευση με χρήση του εργαλείου H5P
Creators: name: Ζαχαριάδου, Βασιλική Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Moodle
Δευτεροβάθμια Εκπαίδευση
H5P
Secondary Education

description: Η επιταχυνόμενη εξέλιξη των Τεχνολογιών Πληροφορίας και Επικοινωνίας (ΤΠΕ) στην εκπαίδευση δημιουργεί μια νέα πραγματικότητα τόσο για τους εκπαιδευτικούς, που καλούνται να προσαρμοστούν στις νέες Τεχνολογικές συνθήκες, όσο και για τους μαθητές. Η ανάγκη για απόκτηση νέων τεχνολογικών δεξιοτήτων από τους εκπαιδευτικούς είναι πιο σημαντική από ποτέ. Στο πλαίσιο της παρούσας εργασίας έχει δημιουργηθεί ένα μαθησιακό περιβάλλον στην πλατφόρμα Moodle και έχει αναπτυχθεί διαδραστικό διδακτικό περιεχόμενο για τις τάξεις της δευτεροβάθμιας εκπαίδευσης με χρήση του εργαλείου Η5P και αφορά τα φιλολογικά μαθήματα. Το διαδραστικό διδακτικό περιεχόμενο αποτελεί μια πρόταση διδασκαλίας και έχει στόχο την ενημέρωση των εκπαιδευτικών για τη διαθέσιμη αυτή διδακτική πρακτική και την πιθανή ενσωμάτωση της. Για την αξιολόγηση της πρότασης ενσωμάτωσης του εργαλείου H5P ζητήθηκε από 23 φιλολόγους, να περιηγηθούν στην πλατφόρμα και στη συνέχεια να απαντήσουν στο ερωτηματολόγιο βασισμένο το τεχνολογικό μοντέλο TPACK, να αξιολογήσουν την πλατφόρμα και να απαντήσουν αν θα την υιοθετούσαν στην εκπαιδευτική τους καθημερινότητα. Τα αποτελέσματα της έρευνας ήταν ενθαρρυντικά. Η πλειοψηφία των ερωτηθέντων δήλωσε ότι έλαβε μερική ενημέρωση του εργαλείου H5P και θα ενσωμάτωναν το εργαλείο στην εκπαιδευτική τους καθημερινότητα, με την πλειονότητα να δηλώνει ότι θα χρησιμοποιούσε το εργαλείο για την ανάπτυξη ολόκληρης διδασκαλίας.
description: The accelerating evolution of Information and Communication Technologies (ICT) in education creates a new reality for both teachers, who are called to adapt to the new Technological conditions, and for students. The need for teachers to acquire new technological skills is more important than ever. In the context of the present work, a learning environment has been created on the Moodle platform and an interactive didactic content has been developed for the secondary education classes using the H5P tool and concerns the philological lessons. The interactive teaching content is a teaching proposal and aims to inform teachers about this available teaching practice and its possible integration. To evaluate the proposal for the integration of the H5P tool, 23 philologists were asked to browse the platform and then answer the questionnaire based on the TPACK technology model to evaluate the platform and answer whether they would adopt it in their educational routine. The results of the survey were encouraging. Most respondents stated that they had received a partial update of the H5P tool and would incorporate the tool into their teaching, with the majority stating that they would use the tool to develop an entire teaching.
Συγκριτική ανάλυση των σκοτεινών μοτίβων των ελληνικών λαϊκών παραμυθιών και των θρύλων/παραδόσεων στη συλλογή διηγημάτων του Αλέξανδρου Παπαδιαμάντη, Τα σκοτεινά παραμύθια (2005)
Creators: name: Βελισσαρίου, Αγγελική Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Παπαδιαμάντης, Αλέξανδρος
Σκοτεινά μοτίβα θρύλων και λαϊκών παραμυθιών
Παραμυθιακός τύπος
Papadiamantis, Alexandros
Dark motifs in legends and folktales
Folktale types

description: Η παρούσα εργασία ασχολείται με την συγκριτική ανάλυση των σκοτεινών μοτίβων που συναντάμε στα ελληνικά λαϊκά παραμύθια και στους θρύλους/παραδόσεις του τόπου μας, σε σχέση με την συλλογή διηγημάτων: Τα σκοτεινά παραμύθια του Αλέξανδρου Παπαδιαμάντη (2005, Αθήνα: Μεταίχμιο). Η ανθολογία αυτή αποτελείται από 19 διηγήματα που έχει επιλέξει και σχολιάσει ο Στρατής Πασχάλης. Ο κοινός παρονομαστής των διηγημάτων αυτών είναι ότι τα «χαρακτηρίζει η υποβολή, το μυστήριο, η μαγεία, το υπερφυσικό, η ατμόσφαιρα του τρόμου και του ονείρου» (Σ. Πασχάλης, 2005, 17). Σκοπός λοιπόν της συγκριτικής ανάλυσης είναι να διαπιστωθεί ο βαθμός με τον οποίο τα διηγήματα αυτά έχουν επηρεαστεί από τα λαϊκά παραμύθια και τους θρύλους, αλλά και ο τρόπος με τον οποίο εμπεριέχουν σκοτεινά μοτίβα που υπάρχουν στα λαϊκά παραμύθια και στους θρύλους. Κάθε διήγημα αναλύεται με γνώμονα την αναζήτηση αυτών των μοτίβων και τη σύνδεση με τους αντίστοιχους παραμυθιακούς τύπους (ΑΤ), σύμφωνα με τους ελληνικούς καταλόγους: Επεξεργασία παραμυθιακών τύπων και παραλλαγών
description: This dissertation is a comparative analysis of the dark motifs found in Greek folktales, as well as in Greek legends, and the compilation of short stories: Dark tales by Alexandros Papadiamantis (2005). This anthology constitutes of 19 short stories, compiled and annotated by Stratis Pasxalis. All of these stories have an eerie, unearthly quality to them, a mystical atmosphere of terror, magic and dreams (S. Pasxalis, 2005). The objective of this comparative analysis is to ascertain whether these short stories have indeed been influenced by oral traditions and to analyze the way in which specific dark motifs found in folktales and legends, have been incorporated in the stories. Each story is analyzed in search of these dark motifs and their correlation to the legends and folktale types (AT) by Aarne-Thompson, as found in the Greek folktale catalogues, conducted by A. Aggelοpoulou and her colleagues