cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modeling Integrated Properties and the Polarization of the Sunyaev-Zeldovich Effect
Creators: name: Rephaeli, Y.
name: Sadeh, S.
name: Shimon, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Two little explored aspects of Compton scattering of the CMB in clusters are discussed: The statistical properties of the Sunyaev-Zeldovich (S-Z) effect in the context of a non-Gaussian density fluctuation field, and the polarization patterns in a hydrodynamcially-simulated cluster. We have calculated and compared the power spectrum and cluster number counts predicted within the framework of two density fields that yield different cluster mass functions at high redshifts. This is done for the usual Press & Schechter mass function, which is based on a Gaussian density fluctuation field, and for a mass function based on a chi^2-distributed density field. We quantify the significant differences in the respective integrated S-Z observables in these two models. S-Z polarization levels and patterns strongly depend on the non-uniform distributions of intracluster gas and on peculiar and internal velocities. We have therefore calculated the patterns of two polarization components that are produced when the CMB is doubly scattered in a simulated cluster. These are found to be very different than the patterns calculated based on spherical clusters with uniform structure and simplified gas distribution.
description: 22 pages, 25 figures, Proceedings of the Francesco Melchiorri memorial conference, New Astronomy Reviews, in press
title: A preconditioned block conjugate gradient algorithm for computing extreme eigenpairs of symmetric and Hermitian problems
Creators: name: Ovtchinnikov, EE
name: Reid, JK
Publisher: name: Science and Technology Facilities Council
Year: 2010
Subjects: preconditioned conjugate gradient method
Fortran 95
Hermitian eigenvalue problems

description: This report describes an algorithm for the efficient computation of several extreme eigenvalues and corresponding eigenvectors of a large-scale standard or generalized real symmetric or complex Hermitian eigenvalue problem. The main features are: (i) a new conjugate gradient scheme specifically designed for eigenvalue computation; (ii) the use of the preconditioning as a cheaper alternative to matrix factorization for large discretized differential problems; (iii) simultaneous computation of several eigenpairs by subspace iteration; and (iv) the use of efficient stopping criteria based on error estimation rather than the residual tolerance.
Latent Map Gaussian Processes for Mixed Variable Metamodeling
Creators: name: Oune, Nicholas
name: Bostanabad, Ramin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences
subject: I.2.6

description: Gaussian processes (GPs) are ubiquitously used in sciences and engineering as metamodels. Standard GPs, however, can only handle numerical or quantitative variables. In this paper, we introduce latent map Gaussian processes (LMGPs) that inherit the attractive properties of GPs and are also applicable to mixed data which have both quantitative and qualitative inputs. The core idea behind LMGPs is to learn a continuous, low-dimensional latent space or manifold which encodes all qualitative inputs. To learn this manifold, we first assign a unique prior vector representation to each combination of qualitative inputs. We then use a low-rank linear map to project these priors on a manifold that characterizes the posterior representations. As the posteriors are quantitative, they can be directly used in any standard correlation function such as the Gaussian or Matern. Hence, the optimal map and the corresponding manifold, along with other hyperparameters of the correlation function, can be systematically learned via maximum likelihood estimation. Through a wide range of analytic and real-world examples, we demonstrate the advantages of LMGPs over state-of-the-art methods in terms of accuracy and versatility. In particular, we show that LMGPs can handle variable-length inputs, have an explainable neural network interpretation, and provide insights into how qualitative inputs affect the response or interact with each other. We also employ LMGPs in Bayesian optimization and illustrate that they can discover optimal compound compositions more efficiently than conventional methods that convert compositions to qualitative variables via manual featurization.
description: 35 Pages, 7 Figures, 14 Tables
A Remark on "Two-Sided" Monotonicity Condition: An Application to $L^{p}$ Convergence
Creators: name: Le, Rui-Jun
name: Zhou, Song-Ping
Publisher: name: arXiv
Year: 2006
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42A20; 42A32

description: To verify the universal validity of the "two-sided" monotonicity condition introduced in [8], we will apply it to include more classical examples. The present paper selects the $L^{p}$ convergence case for this purpose. Furthermore, Theorem 3 shows that our improvements are not trivial.
description: 10 pages
Σχολιασμένη διερμηνεία στο πλαίσιο της πρακτικής άσκησης της κατεύθυνσης Διερμηνείας του ΔΠΜΣ Διερμηνείας και Μετάφρασης με έμφαση στην ταυτόχρονη διερμηνεία τεχνικών κειμένων
Creators: name: Αντώνιος Μιχαλάκης Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Σχολιασμένη Διερμηνεία
Τεχνικά Κείμενα
Πρακτική Άσκηση
Commented Interpretation
Technical texts
Work Experience Placement

description: Σκοπός της μεταπτυχιακής εργασίας, ήταν η αναλυτική παρουσίαση της εμπειρίας, την οποία αποκόμισε ο γράφων, στο πλαίσιο της πρακτικής άσκησης του ΔΠΜΣ Διερμηνείας και Μετάφρασης. Η έμφαση δόθηκε στη διερμηνεία τεχνικών κειμένων, στα τρία συνέδρια, στα οποία λάβαμε μέρος. Στο πλαίσιο της εργασίας, συντάχθηκε, κατ’ αρχάς μία εισαγωγή, η οποία περιλάμβανε τους σκοπούς αυτής, μεταξύ άλλων. Επιχειρήθηκε, ακόμη, μία θεωρητική ανάλυση της διερμηνείας. Επιροσθέτως, παρουσιάστηκαν ο χώρος και η ημερομηνία διεξαγωγής των συνεδρίων, το είδος της διερμηνείας, το είδος των συνεδρίων, οι φορείς διοργάνωσης, οι γλωσσικοί συνδυασμοί, ο αριθμός των συμμετεχόντων, το αναλυτικό πρόγραμμα αυτών, καθώς και ορισμένες πληροφορίες για τους διοργανωτές. Ακόμη, παρουσιάστηκαν αναλυτικά, τα βιογραφικά των ομιλητών, οι δυσκολίες που εντοπίστηκαν κατά την εκπόνηση της διερμηνείας και τέλος, εκπονήθηκαν γλωσσάρια σχετικά με την ορολογία κάθε συνεδρίου. Εν κατακλείδι, παρουσιάστηκαν, τα συμπεράσματα της μεταπτυχιακής εργασίας, μία σύντομη βιβλιογραφία με ηλεκτρονικές πηγές και το παράρτημα, με τα έντυπα αξιολόγησης των εκπαιδευτών, μεταξύ άλλων.
description: The aim of the current postgraduate thesis, was to present in a detailed manner, the experience obtained by the writer, in the framework of the Joint Postgraduate Studies programme “Conference Interpreting and Translation”. The emphasis was put on the interpreting of technical texts, pronounced at the conferences we participated in. We produced an introduction, in which the aims of this thesis were presented, among others. A theoretical analysis of interpreting was also highlighted. Moreover, we described the time and date of said conferences, the interpreting type, as well as the conference type, the language combinations, their detailed schedule, the number of participants and some information about the organizers. What is more, we presented the speakers’ CVs, some difficulties encountered while interpreting and finally, the glossaries for every conference. To sum up, we closed with the thesis’s conclusions, along with a short bibliography, comprised of electronic sources and the annex, with the evaluation made by our coaches, among others.
Επισκόπηση τομέων και τεχνικών σχετικά με τις οικονομικές τεχνολογίες (Fintech)
Creators: name: Σωπρανίδης, Αθανάσιος Αντωνίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Τεχνολογία
Χρηματοοικονομική
Οικοσύστημα
Technology
Financial
Ecosystem

description: Η μακρά ιστορία της ανθρωπότητας είναι συνυφασμένη με την οικονομική δραστηριότητα και την τεχνολογία. Και οι δύο αυτοί τομείς συναντώνται από την αρχαιότητα και ενώ σε πρώτη ανάγνωση μπορεί κανείς να θεωρήσει ότι είναι ανεξάρτητοι μεταξύ τους, εντούτοις αποτελούν δύο τομείς οι οποίοι συνδέονται και αλληλεπιδρούν καθώς τα επιτεύγματα της τεχνολογίας χρησιμοποιούνται ανά τους αιώνες προκειμένου να διευκολύνουν την οικονομική δραστηριότητα. Με την εξέλιξη και διείσδυση της τεχνολογίας στην καθημερινότητα των πολιτών καθώς και της χρησιμοποίησης της για την παροχή καλύτερων και αξιόπιστων χρηματοοικονομικών υπηρεσιών προέκυψε ο όρος Fintech, ο οποίος συμπυκνώνει τους δύο αυτούς όρους, ήτοι της οικονομικής δραστηριότητας και της τεχνολογίας Σκοπός της παρούσας διπλωματικής εργασίας είναι να παρουσιάσει την αλληλεπίδραση μεταξύ της τεχνολογίας και της οικονομικής δραστηριότητας έτσι όπως αυτή έχει διαμορφωθεί τα τελευταία χρόνια και συμπυκνώνεται στον όρο Fintech , να παρουσιάσει τους κυριότερους ορισμούς που έχουν δοθεί για το Fintech προτείνοντας ένα νέο, να αναλύσει τους τομείς που απαρτίζουν το οικοσύστημα του Fintech καθώς και την πορεία τους τα επόμενα χρόνια και να διερευνήσει τις προοπτικές του Fintech στο μέλλον βασιζόμενη στην εξέλιξη και διάδοση της τεχνολογίας και αναλύοντας την συμπεριφορά των χρηστών της, δίνοντας τέλος και κάποια παραδείγματα χρήσης των νέων τεχνολογιών στον τομέα των ασφαλιστικών προϊόντων.
description: The long history of humanity is closely interwoven with financial activity and technology. These two domains have crossed paths ever since antiquity and while at first one can consider them as being independent they are in fact closely connected and interact since technological accomplishments have been used throughout the ages so as to facilitate any financial activity. Through technological evolution, its presence in people’s everyday lives as well as its practical application when providing better and more reliable financial services the term Fintech emerged. This term condenses both of the aforementioned terms, that is financial activity and technology. The aim of this thesis is to present the interaction between technology and financial activity as it has been shaped over the past years and is condensed in the term Fintech, to present the main definitions that have been given to it while at the same time suggesting a new one, to analyze the varius fields that make up Fintech’s ecosystem, as well as their course over the next years. Additionally, it aims to investigate future perspectives of Fintech on the basis of technological evolution and dissemination and its users behavioral analysis. Finally, it aims to provide some examples of the use of new technologies in the field of insurance products
PKI decentralization using blockchain technologies
Creators: name: Σερμπίνης, Θωμάς Εμμανουήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Υποδομή Δημοσίου Κλειδιού
Αποκεντροποίηση
Τεχνολογίες Blockchain
Public key infrastructure
Blockchain
Decentralization

description: Η υποδομή δημόσιου κλειδιού (PKI) χρησιμοποιείται ευρέως στο διαδίκτυο για την πιστοποίηση της ταυτότητας των χρηστών και ως εκ τούτου κρυπτογραφεί την επικοινωνία μεταξύ των δύο μερών και την καθιστά ασφαλέστερη. Από αυτό το μοντέλο μπορεί να προκύψουν πολλαπλά προβλήματα, τα περισσότερα λόγω του κεντροποιημένου χαρακτήρα του. Στο παρελθόν, υπήρξαν περιπτώσεις που οι αρχές έκδοσης πιστοποιητικών (Certificate Authorities - CA) διένειμαν αθέμιτα - κακόβουλα πιστοποιητικά τα οποία είχαν ως αποτέλεσμα επιθέσεις, στοχεύοντας τους χρήστες του συστήματος. Στις περισσότερες από αυτές τις περιπτώσεις είναι πραγματικά δύσκολο να εντοπιστούν και να ανακληθούν αυτά τα πιστοποιητικά, και ως εκ τούτου, οι χρήστες παραμένουν ευάλωτοι. Αλλά ακόμα και αν ανακληθεί το πιστοποιητικό, η διαδικασία ενημέρωσης του χρήστη είναι πολύ αργή και αναποτελεσματική, με αποτέλεσμα ακόμη περισσότερες αρνητικές επιπτώσεις. Προκειμένου να διορθωθούν αυτά τα προβλήματα, αναπτύχθηκαν δύο διαφορετικές αποκεντροποιημένες εναλλακτικές λύσεις του συστήματος PKI, χρησιμοποιώντας τεχνολογίες blockchain όπως το Bitcoin και το Ethereum. Στα μοντέλα και τις εφαρμογές που έχουν αναπτυχθεί, οι πτυχές της διαφάνειας, της αμεταβλητότητας και της αποκεντροποίησης αυτών των τεχνολογιών blockchain έχουν αξιοποιηθεί. Αφήνοντας κατά μέρος τον κεντροποιημένο χαρακτήρα του παραδοσιακού συστήματος PKI, το σύστημα που προκύπτει είναι πιο ασφαλές, πιο αξιόπιστο, φθηνότερο και ανοικτό.
description: The Public Key Infrastructure (PKI) is used widely on the Internet in order to certify the identity of users, and as a result encrypt the communication between two parties and make it more secure. From this model, multiple problems can arise, most of them due to its centralized nature. In the past, there have been cases of Certificate Authorities distributing rogue certificates that resulted in attacks, targeting users of the system. In most of these cases, it is really difficult to detect and revoke these certificates, and as a result, users remain vulnerable. But even if the certificate is revoked, the user update process is really slow and inefficient, resulting in even more implications. In order to fix these issues, two different decentralized PKI alternatives has been developed, using blockchain technologies like Bitcoin and Ethereum. In the models and implementations that have been developed, the transparency, immutability and decentralization aspects of these blockchain technologies has been leveraged. Leaving aside the centralized Certificate Authority aspect of the traditional PKI, the resulting system is more secure, more reliable, cheaper and open.
On the maps from X(4p) to X(4)
Creators: name: Jaafar, Samar
name: Khuri-Makdisi, Kamal
Publisher: name: arXiv
Year: 2007
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 11F11, 11F23

description: We study pullbacks of modular forms of weight 1 from the modular curve X(4) to the modular curve X(4p), where p is an odd prime. We find the extent to which such modular forms separate points on X(4p). Our main result is that these modular forms give rise to a morphism F from the quotient of X(4p) by a certain involution i to projective space, such that F is a projective embedding of X(4p)/i away from the cusps. We also report on computer calculations regarding products of such modular forms, going up to weight 4 for p <= 13, and up to weight 3 for p <= 23, and make a conjecture about these products and about the nature of the singularities at the cusps of the image F(X(4p)/i).
description: 12 pages, minor revisions following referee's report
First 3D vector tracking of helium recoils for fast neutron measurements at SuperKEKB
Creators: name: Hedges, M. T.
name: Vahsen, S. E.
name: Jaegle, I.
name: Lewis, P. M.
name: Nakayama, H.
name: Schueler, J.
name: Thorpe, T. N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present results from the first deployment of novel, high definition, compact gas Time Projection Chambers (TPCs) with pixel chip readout as part of the BEAST II beam background measurement project at SuperKEKB. The TPCs provide detailed 3D imaging of ionization from neutron-induced nuclear recoils in a helium and carbon dioxide target gas mixture at standard temperature and pressure. We find excellent electron background rejection, leading to background-free nuclear recoil measurements above 50 keVee, despite the extreme high-background environment. We measure an angular resolution better than 20° for recoil tracks longer than 1.7 mm, corresponding to an average ionization energy of ~100 keVee. We also obtain the 3D vector direction of helium recoils by utilizing charge profile measurements along the recoil axis, with a correct head/tail assignment efficiency of approximately 80%. With this performance, we present comparisons between measured and simulated event rates, recoil energy spectra, and directional distributions originating from beam-gas and Touschek beam losses at SuperKEKB. We utilize head/tail recognition to distinguish neutron components travelling with positive radial velocity in the Belle II coordinate system from those with opposite directionality. Finally, we present a novel method of discriminating beam-gas interactions from Touschek beam losses that can eliminate the need for dedicated accelerator runs for background measurements. This method is still statistics-limited. However, future studies should be able to verify this method, which in turn could lead to neutron background analysis runs symbiotic with normal Belle II operation. The capabilities demonstrated here also suggest that high definition recoil imaging in gas TPCs is applicable to low energy, low-background experiments, such as directional dark matter searches.
Oka's conjecture on irreducible plane sextics. II
Creators: name: Degtyarev, Alex
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H30; 14J27

description: We complete the proof of Oka's conjecture on the Alexander polynomial of an irreducible plane sextic. We also calculate the fundamental groups of irreducible sextics with a singular point adjacent to $J_{10}$.
Spectral fluctuations of billiards with mixed dynamics: from time series to superstatistics
Creators: name: Abul-Magd, A. Y.
name: Dietz, B.
name: Friedrich, T.
name: Richter, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: A statistical analysis of the eigenfrequencies of two sets of superconducting microwave billiards, one with mushroom-like shape and the other from the familiy of the Limacon billiards, is presented. These billiards have mixed regular-chaotic dynamics but different structures in their classical phase spaces. The spectrum of each billiard is represented as a time series where the level order plays the role of time. Two most important findings follow from the time-series analysis. First, the spectra can be characterized by two distinct relaxation lengths. This is a prerequisite for the validity of the superstatistical approach which is based on the folding of two distribution functions. Second, the shape of the resulting probability density function of the so-called superstatistical parameter is reasonably approximated by an inverse chi-square distribution. This distribution is used to compute nearest-neighbor spacing distributions and compare them with those of the resonance frequencies of billiards with mixed dynamics within the framework of superstatistics. The obtained spacing distribution is found to present a good description of the experimental ones and is of the same or even better quality as a number of other spacing distributions, including the one from Berry and Robnik. However, in contrast to other approaches towards a theoretical description of spectral properties of systems with mixed dynamics, superstatistics also provides a description of properties of the eigenfunctions. Indeed, the inverse chi-square parameter distribution is found suitable for the analysis of experimental resonance strengths in the Limacon billiards within the framework of superstatistics.
description: 23 pages, 8 figures
Toward a Unified Description of Dark Energy and Dark Matter from the Abnormally Weighting Energy Hypothesis
Creators: name: Fuzfa, A.
name: Alimi, J. -M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Abnormally Weighting Energy (AWE) hypothesis consists of assuming that the dark sector of cosmology violates the weak equivalence principle (WEP) on cosmological scales, which implies a violation of the strong equivalence principle for ordinary matter. In this paper, dark energy (DE) is shown to result from the violation of WEP by pressureless (dark) matter. This allows us to build a new cosmological framework in which general relativity (GR) is satisfied at low scales, as WEP violation depends on the ratio of the ordinary matter over dark matter densities, but at large scales, we obtain a general relativity-like theory with a different value of the gravitational coupling. This explanation is formulated in terms of a tensor-scalar theory of gravitation without WEP for which there exists a revisited convergence mechanism toward GR. The consequent DE mechanism build upon the anomalous gravity of dark matter (i) does not require any violation of the strong energy condition $p
description: 17 pages, 13 figures; version 3: one references added, matches version published in Phys. Rev. D
Doping dependance of the spin resonance peak in bilayer high-$T_c$ superconductors
Creators: name: Zhou, T.
name: Wang, Z. D.
name: Li, Jian-Xin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Motivated by a recent experiment on the bilayer Y$_{1-x}$Ca$_{x}$Ba$_2$Cu$_3$O$_y$ superconductor and based on a bilayer $t-J$ model, we calculate the spin susceptibility at different doping densities in the even and odd channels in a bilayer system. It is found that the intensity of the resonance peak in the even channel is much weaker than that in the odd one, with the resonance position being at a higher frequency. While this difference decreases as the doping increases, and both the position and amplitude of the resonance peaks in the two channels are very similar in the deeply overdoped sample. Moreover, the resonance frequency in the odd channel is found to be linear with the critical temperature $T_c$, while the resonance frequency increases as doping decreases in the even channel and tends to saturate at the underdoped sample. We elaborate the results based on the Fermi surface topology and the d-wave superconductivity.
description: 6 pages, 5 figures
title: Temperature dependence of the physical properties of Bose-Einstein condensed gases and liquids
Creators: name: Mayers, J
Publisher: name: Science and Technology Facilities Council
Year: 2010

description: Gases and liquids in the presence of Bose-Einstein condensation (BEC) have unique and very striking macroscopic physical properties. For example they exhibit flow without viscosity, quantised vortices and two-fluid behaviour. Macroscopic quantum interference effects in the form of density oscillations are observed when two or more clouds of ultra-cold Bose-Einstein condensed atoms overlap. The microscopic properties of Bose-Einstein condensed liquid (superscript)4He are also uniquely anomalous and unexplained. Neutron and X-ray scattering measurements show that liquid (superscript)4He in its superfluid phase is the only known liquid in which pair correlations between atomic positions decrease upon cooling. The liquid also shows an anomalous thermal expansion upon cooling. Inelastic neutron scattering shows that it is also the only known liquid which has sharp peaks in its dynamic structure factor. It is shown here that all the above phenomena can be explained in a physically transparent and quantitative way by simply stated postulates. The first is that in the presence of BEC at finite temperature, the many particle wave functions of occupied states can be written as the sum of a componant which is localized in coordinate space and a component which is delocalized. The second is that the delocalised component is identical to the ground state wave function. It is argued that these postulates are in fact forced by basic quantum mechanics, existing theoretical treatments of BEC and a wide range of experimental measurements of Bose-Einstein condensed liquid (superscript)4He.
Emergent Spacetime and The Cosmological Constant
Creators: name: Yang, Hyun Seok
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We address issues on the origin of gravity and the dark energy (or the cosmological constant) from the perspectives of emergent gravity. We discuss how the emergent gravity reveals a noble, radically different picture about the origin of spacetime, which is crucial for a tenable solution of the cosmological constant problem. In particular, the emergent gravity naturally explains the dynamical origin of flat spacetime, which is absent in Einstein gravity.
description: 2 pages; Contribution to Proceedings of the workshop "Progress of String Theory and Quantum Field Theory", Osaka City University, Japan, 7-10 December 2007
Health intervention as a catalyst for community development : A case study of the Nong Khaem mother and child health project (Bangkok, Thailand)
Creators: name: Jawanda, Kimindra
Publisher: name: University of British Columbia
Year: 2009

description: By the year 2000, urban areas will be home to more than fifty percent of the world's population. The rapid rate of urbanization particularly in the developing world will no doubt lead to an increase in slum and squatter communities. In conjunction with this growth, there will be a lack of both physical and social infrastructure, and urban problems will become even more acute than they are today. There is a growing realization that growth management policies have to be put into effect in order to deal with the creation of these mega-urban regions: policies which recognize the absolute need of participation of all the players involved. This thesis examines two themes: (1) the role of a local non-governmental organization (NGO) in an urban poor site in Bangkok, Thailand in promoting community development and; (2) the establishment of a primary healthcare unit and its use as a catalyst for further community development, in which women are targeted as the agents of change. Questionnaires and informal discussions were conducted with the community residents and leaders; NGO staff; local municipal authorities and with other NGOs. The principal findings were the following: (1) the poor can articulate their needs and are able to assist themselves if given the training and resources to do so; (2) there should be better coordination between the players involved, ie - the public, private and voluntary (including community residents) sectors of society; (3) health as an initial entry feature into a community can prove to be a successful mode in advancing community development; (4) by training the women in the community as both health care workers and daycare workers, the facilities will have a better chance of being sustained once the NGO pulls out; (5) the community should play a crucial participatory role in the designing, implementing and monitoring stages of any development project and; (6) by decentralizing activities to the local level, aid becomes more effective.
title: Evaluation complexity of adaptive cubic regularization methods for convex unconstrained optimization
Creators: name: Cartis, C
name: Gould, N I M
name: Toint, PL
Publisher: name: Science and Technology Facilities Council
Year: 2010

description: algorithms described in Cartis, Gould & Toint (2009, 2010) for unconstrained (nonconvex) optimization are shown to have improved worst-case efficiency in terms of the function-and gradient-evaluation count when applied to convex and strongly convex objectives. In particular, our complexity upper bounds match in order (as a function of the accuracy of approximation), and sometimes even improve, those obtained by Nesterov (2004, 2008) and Nesterov & Polyak (2006) for these same problem classes, without employing the Hessian?s Lipschitz constant explicitly in the algorithms or requiring exact or global solution of the subproblem. An additional outcome of our approximate approach is that our complexity results can naturally capture the advantages of both first- and second-order methods.
Μελέτη της αποδοτικότητας των ομάδων μπάσκετ με τη χρήση Μαρκοβιανών Αλυσίδων
Creators: name: Κωστακίδης, Θεόδωρος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Μαρκοβιανές αλυσίδες
Τύπος Αποδοτικότητας
Dean Oliver
Markov Chains
Efficiency Index

description: Στην παρούσα εργασία μελετάται η μοντελοποίηση των αγώνων μπάσκετ με στόχο την εκτίμηση της αποδοτικότητας των 5- άδων των παικτών και την παροχή ενός δείκτη που θα λειτουργεί ως οδηγός βελτιστοποίησης της επιλογής του προπονητή ως προς την κατάλληλη 5-άδα. Τα βασικά εργαλεία της μοντελοποίησης που χρησιμοποιούνται είναι (α) το ομογενές Μαρκοβιανό μοντέλο και (β) ο δείκτης αποδοτικότητας του Dean Oliver. Πιο συγκεκριμένα, η εργασία αποτελείται από 5 κεφάλαια. Στο κεφάλαιο 1 παρατίθενται οι βασικοί ορισμοί και οι ιδιότητες των Μαρκοβιανών Αλυσίδων που χρησιμοποιούνται για τους σκοπούς της εργασίας. Στο κεφάλαιο 2 δίνεται η περιγραφή ενός αγώνα μπάσκετ καθώς και οι διάφορες παραδοχές που υποθέσαμε για να προχωρήσουμε στη μοντελοποίηση. Στη συνέχεια δίνεται η περιγραφή της διαδικασίας επιλογής των 5-άδων κατά την διάρκεια ενός αγώνα. Στο κεφάλαιο 3 γίνεται αναφορά στον δείκτη του Dean Oliver και στην ανάλυση των χαρακτηριστικών της αποδοτικότητας μιας ομάδας που περιγράφονται με αυτόν. Στο κεφάλαιο 4 περιγράφεται η επιλογή της ομάδας του Άρη, η εύρεση των 5-άδων που θέλουμε να μελετήσουμε κατά την διάρκεια της χρονιάς και η αντιστοίχιση και κωδικοποίηση των χαρακτηριστικών του τύπου του Dean Oliver. Τέλος, στο κεφάλαιο 5 υπολογίζεται η εκτίμηση του δείκτη, αναλύονται τα αποτελέσματα της έρευνας και δίνονται τα βασικά συμπεράσματα.
description: In the present paper we study the efficiency of a basketball team’s players categorized in groups of five and provide an estimation of the corresponding efficiency index which could be used as a tool for optimizing the coach’s choice in relation to the best group. The basic tools for the modeling are (a) The homogeneous Markov chain and (b) The efficiency Index of Dean Oliver. More specifically, in Chapter 1 we provide basic elements of the theory of Markov chains. In Chapter 2 we describe a basketball game and the conditions required for the modeling. In what follows, the selection’s procedure of the groups during a game is provided. In Chapter 3 we refer to the efficiency index of Dean Oliver and we analyze the efficiency characteristics of a team which are included in the above index. In Chapter 4 the choice of the team ARIS is provided along with the corresponding data. Then in what follows the estimations of the characteristics through the Markovian modeling are given. Last, in Chapter 5 the index calculations for the various cases according to the selected groups are provided and some conclusions are also given.
Η μεθοδολογία CLIL: θεωρητικά ζητήματα και ερευνητικά δεδομένα στην ελληνική κοινωνία
Creators: name: Διαμαντίδου, Ευαγγελία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Διδασκαλία της γλώσσας μέσω του περιεχομένου
Διδακτική προσέγγιση
Δίγλωσση εκπαίδευση
CLIL
Approach to learning
Bilingual education

description: Στην παρούσα εργασία επιχειρήσαμε μια παρουσίαση των ερευνών που έχουν διεξαχθεί ως το 2017 σε δημόσια σχολεία της Ελλάδας και της Κύπρου με την καινοτόμο μεθοδολογία Content and Language Integrated Learning (CLIL). Αρχικά, παρουσιάζουμε τις κατευθύνσεις που θέτει η Ευρωπαϊκή Ένωση (ΕΕ) και κάποια θεωρητικά στοιχεία σχετικά με τη μεθοδολογία. Έπειτα, παραθέτουμε τα ερευνητικά δεδομένα ομαδοποιημένα ανά βαθμίδα εκπαίδευσης (πρωτοβάθμια και δευτεροβάθμια) και ανά γλώσσα-στόχο (αγγλικά, ελληνικά ως δεύτερη ή ξένη γλώσσα, γαλλικά και μία μόνο περίπτωση για τα γερμανικά). Επιλογικά, θέτουμε προβληματισμούς σχετικά με την ανάγκη αξιοποίησης αρχών του CLIL για τη διδασκαλία όχι μόνο μιας ξένης αλλά και της μητρικής γλώσσας, μιας και είναι φανερή η δυσκολία αποκωδικοποίησης του απαιτητικού ακαδημαϊκού λεξιλογίου αρκετών γνωστικών αντικειμένων. Αν και οι πρακτικές δυσκολίες που υπάρχουν είναι πολλές και άπτονται διάφορων πεδίων, η Ελλάδα θα πρέπει να κάνει ουσιαστικότερα και αποφασιστικότερα βήματα για την ενσωμάτωση, και όχι μόνο την πιλοτική εφαρμογή, της μεθοδολογίας στα σχολικά συμφραζόμενα. Αυτή η ενσωμάτωση είναι ουσιαστικής σημασίας μιας και τα οφέλη είναι πολλαπλά και στον γνωστικό και στον γλωσσικό αλλά και στον συναισθηματικό τομέα και ευθυγραμμίζονται με τις κατευθύνσεις της ΕΕ.
description: This thesis presents an extensive review of studies that have implemented Content and Language Integrated Learning (CLIL) methodology in Greek and Cypriot public schools until 2017. To begin with, we discuss the directions set by the European Union (EU) and theoretical issues that are relative to CLIL. Subsequently, we group the research data based on the level of education (primary or secondary) as well as based on the target-language (English, Greek as a second or foreign language, French and, in one case, German). To conclude, we debate the need to incorporate some of CLIL’s principals into the learning process, not only of a foreign language, but also of the mother tongue, given the difficulty of decoding the demanding academic vocabulary in many curricular subjects. While we recognise the manifold practical difficulties of embarking on such a task, we suggest that Greece takes decisive steps towards the complete embodiment of the method, and not only for pilot implementation. This is crucial as it holds numerous benefits in the cognitive, language and emotional skills of the learners, which is in accordance with the guidelines set by the EU.
title: Friedrich Wilhelm Benjamin von Giesebrecht (1814-1889)
title: [Biographie]
titleType: Subtitle
Creators: name: Riezler, Sigmund Von
Publisher: name: Zentralbibliothek Zürich
Year: 1904
Subjects: subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Giesebrecht, Wilhelm von

description: Sonderdruck aus: Allgemeine Deutsche Biographie, 49, S. 341-349
The presence of intermediate-mass black holes in globular clusters and their connection with extreme horizontal branch stars
Creators: name: Miocchi, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: By means of a multimass isotropic and spherical model that includes the self-consistent treatment of a central intermediate-mass black hole (IMBH), the influence of this black hole on the morphological and physical properties of globular clusters is investigated. In agreement with recent numerical studies, it is found that a cluster (with mass M) hosting an IMBH (with mass M_BH) shows, outside the region of gravitational influence of the black hole, a core-like profile resembling a King profile with concentration c < 2, although with a slightly steeper behaviour in the core region. In particular, the core logarithmic slope is s < 0.25 for reasonably low IMBH masses (M_BH < M/100), and c decreases monotonically with M_BH. Completely power-law density profiles (similar to, for example, those of collapsed clusters) are admitted only in the presence of a black hole with an unrealistic M_BH > M. The mass range estimate 12s - 4.8 < log (M_BH/M)< -1.1c - 0.69, depending on the morphological parameters, is deduced by considering a wide range of models. Applying this estimate to a set of 39 globular clusters, it is found that NGC 2808, NGC 6388, M80, M13, M62, M54 and G1 (in M31) probably host an IMBH. For them, the scaling laws M_BH ~ 0.09(M/M_sol)^{0.7} M_sol and M_BH ~ 50[sigma/ (km s^-1)]^{1.2} M_sol are identified from weighted least-squares fits. An important result of this 'collective' study is that a strong correlation exists between the presence of an extreme blue horizontal branch and the presence of an IMBH. In particular, the presence of a central IMBH in M13 and NGC 6388 could explain why these clusters possess extreme horizontal-branch stars, in contrast to their 'second parameter' counterparts M3 and 47 Tuc.
description: LaTeX, 15 pages, 8 figures, 4 tables included. Final version with new G1 data. Accepted for publication on MNRAS. The definitive version is available at www.blackwell-synergy.com
Wave Propagation in the Cantor-Set Media: Chaos from Fractal
Creators: name: Esaki, Kenta
name: Sato, Masatoshi
name: Kohmoto, Mahito
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Propagation of waves in the Cantor-set media is investigated by a renormalization-group type method. We find fixed points for complete reflection, $T^*=0$, and for complete transmission, $T^*=1$. In addition, the wave numbers for which transmission coefficients show chaotic behaviors are reported. The results obtained are for optical waves, and they can be tested in optical experiments. Our method could be applied to any wave propagation through the Cantor set.
description: 4 pages, 6 figures
Δημοσίευση δεδομένων επιστημονικών δημοσιεύσεων ως ανοιχτά διασυνδεδεμένα δεδομένα
Creators: name: Λαμπαδαρίου, Σταυρούλα Παύλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Επιστημονικές δημοσιεύσεις
Διασυνδεδεμένα δεδομένα
Ανοιχτά δεδομένα
Scientific publications
Linked data
Open Data

description: Η παρούσα διπλωματική εκπονήθηκε καθώς εντοπίστηκε η ανάγκη σύνδεσης των μελών ΔΕΠ του τμήματος Πληροφορικής με τις «Πληροφορίες Προσώπου ΑΠΘ» της σελίδας http://www.data.gov.gr, η οποία αποτελεί έναν κατάλογο δημόσιων δεδομένων και παρέχει πρόσβαση σε βάσεις δεδομένων της Ελληνικής κυβέρνησης. Το αντικείμενο της παρούσας διπλωματικής αποτελεί τη συνέχεια και τον εμπλουτισμό μίας υπάρχουσας πτυχιακής εργασίας, η οποία έχει εκπονηθεί στο Τμήμα Πληροφορικής, της Σχολής Θετικών Επιστημών του Αριστοτελείου Πανεπιστημίου Θεσσαλονίκης, από την φοιτήτρια Λιοτήρη Ευαγγελία, με επιβλέποντα καθηγητή τον κύριο Βασιλειάδη Νικόλαο, ο οποίος είναι και ο επιβλέπων της παρούσας διπλωματικής. Πιο συγκεκριμένα η διπλωματική εργασία έχει ως σκοπό την διασύνδεση επιστημονικών δημοσιεύσεων του Πανεπιστημίου και πιο συγκεκριμένα, των μελών ΔΕΠ του τμήματος Πληροφορικής, μέσα από τη σελίδα του ιδρυματικού καταθετηρίου του Πανεπιστημίου (https://ikee.lib.auth.gr) στην οποία και φιλοξενούνται, ως ανοιχτά διασυνδεδεμένα δεδομένα, με τα ανοιχτά δεδομένα της σελίδας http://www.data.gov.gr, έτσι ώστε οι να δίνονται πρόσθετες πληροφορίες για τους καθηγητές του τμήματος.
description: This diploma was developed as the need to connect the faculty members of the IT department with the "AUTH Information of the AUTH" at http://www.data.gov.gr, which is a list of public data and provides access to the Greek’s government databases. The subject of this dissertation is the continuation and enrichment of an existing dissertation, which has been prepared by the Department of Informatics of the School of Sciences of the Aristotle University of Thessaloniki, by the student Lioti Evangelia, supervised by Professor Vasiliadis Nikolaos, who is also the supervisor of the current diploma. More specifically, the diploma thesis aims at the interconnection of scientific publications of the University and more specifically of the faculty members of the Department of Informatics, through the page of the university depository (https://ikee.lib.auth.gr) in which are hosted, as openly interconnected data, with the open data of the page http://www.data.gov.gr so that additional information is given for the department's teachers.
Spectropolarimetry of the 3.4 micron absorption feature in NGC 1068
Creators: name: Mason, R. E.
name: Wright, G. S.
name: Adamson, A.
name: Pendleton, Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In order to test the silicate-core/organic-mantle model of galactic interstellar dust, we have performed spectropolarimetry of the 3.4 micron C-H bond stretch that is characteristic of aliphatic hydrocarbons, using the nucleus of the Seyfert 2 galaxy, NGC 1068, as a bright, dusty background source. Polarization calculations show that, if the grains in NGC 1068 had the properties assigned by the core-mantle model to dust in the galactic diffuse ISM, they would cause a detectable rise in polarization over the 3.4 micron feature. No such increase is observed. We discuss modifications to the basic core-mantle model, such as changes in grain size or the existence of additional non-hydrocarbon aligned grain populations, which could better fit the observational evidence. However, we emphasize that the absence of polarization over the 3.4 micron band in NGC 1068 - and, indeed, in every line of sight examined to date - can be readily explained by a population of small, unaligned carbonaceous grains with no physical connection to the silicates.
description: ApJ, accepted
Neutron Spin Structure from e-3He Scattering with Double Spectator Tagging at the Electron-Ion Collider
Creators: name: Friscic, Ivica
name: Nguyen, Dien
name: Pybus, Jackson
name: Jentsch, Alex
name: Segarra, Efrain
name: Baker, Mark
name: Hen, Or
name: Higinbotham, Douglas
name: Milner, Richard
name: Tadepalli, Arun
name: Tu, Zhoudunming
name: West, Jennifer Rittenhouse
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The spin structure function of the neutron is traditionally determined by measuring the spin asymmetry of inclusive electron deep inelastic scattering (DIS) off polarized3He nuclei. In such experiments, nuclear effects can lead to large model dependencies in the interpretation of experimental data. Here we study the feasibility of suppressing such model dependencies by tagging both spectator protons in the process of DIS off neutrons in3He at the forthcoming Electron-Ion Collider (EIC). This allows reconstructing the momentum of the struck neutron to ensure it was nearly at rest in the initial state, thereby reducing sensitivity to nuclear corrections, and suppress contributions from electron DIS off protonsin3He. Using realistic accelerator and detector configurations, we find that the EIC can probe the neutron spin structure from xB of 0.003 to 0.651. We further find that the double spectator tagging method results in reduced uncertainties bya factor of 4 on the extracted neutron spin asymmetries over all kinematics, and by a factor of 10 in the low-xB region,thereby providing valuable insight to the spin and flavor structure of nucleons
description: 8 pages, 5 figures
title: Reliability of Popliteal Artery Flow-Mediated Dilation in the Seated Position
Creators: name: Akhter, Taskina
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 2024

description: Flow-mediated dilation (FMD) is a noninvasive measurement of endothelial function, which is a useful prognostic tool for cardiovascular disease risk. Despite its widespread use since 1992, the reproducibility of FMD varies widely between studies. This variability in reproducibility is especially significant in the case of the popliteal artery due to different methodological approaches. Studies perform popliteal FMD in various body positions, with the prone and seated positions most common. However, no studies have examined the reproducibility of both the seated and prone positions of the popliteal artery FMD. Therefore, the aim of this study is to examine the test-retest and visit-to-visit reliability of the popliteal artery FMD in the seated position and to see whether differences in % FMD exist between seated and prone positions. The popliteal artery FMD was measured on two occasions in twenty healthy young adults, both in seated and prone positions. Popliteal artery diameter was measured at baseline, during 5 minutes of cuff occlusion at 220 mmHg, and following cuff deflation. FMD was calculated as the percent change from baseline diameter to peak diameter. The reliability of FMD measures were assessed in the prone and seated positions via intraclass correlation coefficient (ICC). Further, differences in FMD measures between the prone and seated positions were assessed via the three-way repeated measures analysis of variance (body position x visit x trial). The results demonstrate that the popliteal artery %FMD is reliable in the seated position both within and between visits (ICC value from 0.67 to 0.89), whereas the prone position has poor-to-moderate reliability within and between visits (ICC value from 0.25 to 0.74). To conclude, the popliteal artery FMD has a good reliability when measured in the seated position which can contribute to the development of a standard protocol to measure the FMD in the seated position.
title: Complementary hydrazone-based dynamic covalent nanoparticles
Creators: name: Marro, Nicolas
Publisher: name: University of St Andrews
Year: 2019

description: The extraordinary and unique properties exhibited by monolayer-stabilised metal nanoparticles suggest exciting potential applications. Surface-bound molecules stabilize the material in colloidal form, but also define a whole host of physicochemical properties and provide a means to link nanoparticles with any number of other components. Post-synthetic strategies for functionalizing nanoparticle-bound monolayers are therefore critical for virtually all applications. However, established methods each have limitations. The emerging concept of dynamic covalent nanoparticle building blocks provides a transformative strategy for achieving responsive and adaptive surface-engineering of nanomaterials. Previously, dynamic covalent hydrazone exchange has been employed to reversibly alter gold nanoparticle-bound monolayers using electrophilic molecular modifiers (aldehydes), establishing the possibility of using dynamic covalent reactions to manipulate nanoparticle-bond functionality. This thesis takes several steps towards developing this approach into a general strategy for divergent modification of nanoparticle surface functionality. Exploiting the directional nature of the hydrazone bond, a complementary family of dynamic covalent nanoparticles having the electrophilic species tethered to the nanoparticle surface, was created. The scope of the dynamic covalent nanoparticle strategy is thus significantly expanded, allowing reversible post-synthetic functionalization using nucleophilic exchange units. Using solution-state NMR spectroscopy, hydrazone exchange kinetics for these two sets of complementary nanoparticles were investigated, revealing how the surface-confined reactivity compares to bulk solution and also significant differences in reactivity between the complementary pair of nanoparticles. The reversible nature of dynamic covalent reactions allows each member of the complementary family of nanoparticle building block to be assembled in a predictable and controlled way, governed by simple abiotic molecular systems. Furthermore, the complementary reactivity of these two systems provides access to binary nanoparticle assemblies without requiring any molecular linkers. Finally, a detailed understanding about surface-confined chemical reactivities offers the opportunity to explore self-sorting behaviour of complementary nanoparticles. Dynamic covalent exchange can be used to not only switch nanoparticle solvent compatibility between widely differing solvents (from hexane to water), but also to progressively tune solubility across the entire continuum between these extremes. Indeed, molecular-level control over surface-confined reactions, allows to produce a self-consistent family of kinetically stable nanoparticles with different mixed-ligands monolayer compositions, providing a unique platform to study structure–property relationships on the nanoscale.