cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Fluctuations in Mass-Action Equilibrium of Protein Binding Networks
Creators: name: Yan, Koon-Kiu
name: Walker, Dylan
name: Maslov, Sergei
Publisher: name: arXiv
Year: 2008
Subjects: subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: We consider two types of fluctuations in the mass-action equilibrium in protein binding networks. The first type is driven by relatively slow changes in total concentrations (copy numbers) of interacting proteins. The second type, to which we refer to as spontaneous, is caused by quickly decaying thermodynamic deviations away from the equilibrium of the system. As such they are amenable to methods of equilibrium statistical mechanics used in our study. We investigate the effects of network connectivity on these fluctuations and compare them to their upper and lower bounds. The collective effects are shown to sometimes lead to large power-law distributed amplification of spontaneous fluctuations as compared to the expectation for isolated dimers. As a consequence of this, the strength of both types of fluctuations is positively correlated with the overall network connectivity of proteins forming the complex. On the other hand, the relative amplitude of fluctuations is negatively correlated with the abundance of the complex. Our general findings are illustrated using a real network of protein-protein interactions in baker's yeast with experimentally determined protein concentrations.
description: 4 pages, 3 figures
Στατιστική μελέτη της μεταβλητότητας του ιονοσφαιρικού μέσου διαδόσεως ραδιοκυμάτων
Creators: name: Φωτιάδης, Δημήτριος Ν.
Publisher: name: Aristotle University of Thessaloniki
Year: 2003
Subjects: Ιονοσφαιρική μεταβλητότητα
Ιονοσφαιρικές διαταραχές
Ionospheric variability
Ionospheric disturbances

description: Αντιμετωπίζεται το ζήτημα του χωροχρονικού προσδιορισμού της ιονοσφαιρικής μεταβλητότητας. Ο πρωτότυπος ιονοσφαιρικός ορισμός της από ημέρα μεταβλητότητας. Επιτρέπει την ποσοτικοποίηση και τη χαρτογράφηση της με τη μέθοδο των εκατοστημορίων. Ο υπολογισμός ορίων μεταβλητότητας της MUF στο επίπεδο 10% και η συγκρισή τους με τις τιμές αναφοράς της ITU-R καταλήγει σε διαφορετική διαμερισματοποίηση με το πλάτος και σε διόρθωση της τάξης του 3-4%, ενώ το άνω δεκατημόριο εξαρτάται ισχυρά από το γεωγραφικό μήκος(ζώνη). Η εκτίμηση της εντός-της ώρας μεταβλητότητας επιτυγχάνεται με τον προτεινόμενο ορισμό. Υπάρχει μια ελάχιστη μεταβλητότητα(περίπου 5%) πάντοτε παρούσα, ενώ προτείνεται μέθοδος ανίχνευσης βραχύβιων "ανωμαλιών" στο ιονοσφαιρικό πλάσμα σε πραγματικό χρόνο. Η διατύπωση ορισμού διαταραγμένης ιονόσφαιρας επιτρέπει τη ξεχωριστή αντιμετώπιση "θετικών" και "αρνητικών" διαταραχών ανεξάρτητα από πιθανά αίτια. Εξετάζεται η πιθανή σύνδεση εμφάνισης των διαταραχών με την ηλιακή/γεωμαγνητική δραστηριότητα καθώς και η χωρική κατανομή με τη φάση και την ώρα έναρξής τους, το βάθος και η διάρκειά τους. Η μορφολογική ταξινόμηση των διαταραχών, ξεχωριστά σε κάθε ηπειρωτική ζώνη, παρέχει ένα φάκελο μεταβλητότητας, συμβάλλοντας στην υλοποίηση αλγόριθμων για την πρόβλεψή τους
description: The dissertation deal with the quantification of the ionospheric variability in time and space. The proposed ionospheric definition of day-to-day variability leads to its quantification and mapping with the percentile method. The calculation of day-to-day MUF variability bounds at the 10% level and their comparison to values by ITU-R show different strip pattern with latitude and improvement (3-4%), while the upper decile depents strongly on langitude. Due to an original definition, the within-the-hour variability is assessed. A 5% level of variability is always present, being a kind of "intrinsic noise" of the plasma. A method for the detection of shortlived "Perturbations" of the ionospheric plasma is proposed. The proposed definition of ionospheric disturbances allows the separate study of "positive" and "negative" sisturbances, independently of their possible causes. The possible connection between storms frequency and solar/magnetic activity is examined. The spatial distribution of storms with their phase, local time onset, depth and duration is investigated. Finally, the mophological classification of disturbances in each continental thus to realisation of further algorithms for ionospheric storm prediction
Η ελληνική γλυπτική των Ελλήνων καλλιτεχνών που γεννήθηκαν κατά την περίοδο 1940-1950: συστηματική κατάλογοι βιογραφικών, εργογραφικών, βιβλιογραφικών στοιχείων των εργασιών τους
Creators: name: Λαζάρου, Σωτηρία
Publisher: name: Aristotle University of Thessaloniki
Year: 2002

description: Η εργασία αυτή αφορά στη συστηματική μελέτη και καταγραφή της καλλιτεχνικής και κοινωνικής δραστηριότητας, 135 ελλήνων καλλιτεχνών που γεννήθηκαν τη δεκαετία 1940-50. Η διάκριση των καλλιτεχνών έγινε με βάση τη γενιά, περίοδο που μπορεί εύκολα να συνδεθεί με τη γενική ιστορική πορεία του τόπου. Στόχος της εργασίας είναι ο προσδιορισμός των μορφοπλαστικών κατακτήσεων και του κοινωνικού ρόλου αυτής της γενιάς. Ετσι η γενιά αυτή πραγματοποιεί άνοιγμα της γλυπτικής προς την κοινωνία. Επεκτείνει την καλλιτεχνική παιδεία ακόμη και σε σχολεία της επαρχίας. Διευρύνει τη μορφή του τρισδιάστατου αντικειμένου σε έργα με πολλαπλά γνωρίσματα σε διαμορφώσεις χώρου και σε έργα που προκύπτουν από τη συλλειτουργία και άλλων τεχνών
description: This work is particularly concerned with thestudy and recording of the artistic, as well as the social activity of about 135 Greek artists, born in the decade of 1940. The criterion of choosing these artists was mainly based on their generation, that is a period which can be associated with the general historic route of Greece. The essential taste of this work is the final orientation of the achievents in sculpture, in terms of plasticity an form, as well as the social role of this particular generation. So this generation seems to give an opportunity to sculpture to come closer to the society. It also expands the artistic culture in fields like secondary schools in the province. It broadens the form of the 3D objects and it transforms them in works with multiple qualities, such as interior formations, as well as in works which come out from the combination of other forms of art, too
Macroscopic Effects of the Quantum Trace Anomaly
Creators: name: Mottola, Emil
name: Vaulin, Ruslan
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The low energy effective action of gravity in any even dimension generally acquires non-local terms associated with the trace anomaly, generated by the quantum fluctuations of massless fields. The local auxiliary field description of this effective action in four dimensions requires two additional scalar fields, not contained in classical general relativity, which remain relevant at macroscopic distance scales. The auxiliary scalar fields depend upon boundary conditions for their complete specification, and therefore carry global information about the geometry and macroscopic quantum state of the gravitational field. The scalar potentials also provide coordinate invariant order parameters describing the conformal behavior and divergences of the stress tensor on event horizons. We compute the stress tensor due to the anomaly in terms of its auxiliary scalar potentials in a number of concrete examples, including the Rindler wedge, the Schwarzschild geometry, and de Sitter spacetime. In all of these cases, a small number of classical order parameters completely determine the divergent behaviors allowed on the horizon, and yield qualitatively correct global approximations to the renormalized expectation value of the quantum stress tensor.
description: 54 pages, RevTeX4, 8 figures
Single-atom verification of the noise-resilient and fast characteristics of universal nonadiabatic noncyclic geometric quantum gates
Creators: name: Zhang, J. W.
name: Yan, L. -L.
name: Li, J. C.
name: Ding, G. Y.
name: Bu, J. T.
name: Chen, L.
name: Su, S. -L.
name: Zhou, F.
name: Feng, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum gates induced by geometric phases are intrinsically robust against noise due to their global properties of the evolution paths. Compared to conventional nonadiabatic geometric quantum computation (NGQC), the recently proposed nonadiabatic noncyclic geometric quantum computation (NNGQC) works in a faster fashion, while still remaining the robust feature of the geometric operations. Here, we experimentally implement the NNGQC in a single trapped ultracold $^{40}$Ca$^{+}$ ion for verifying the noise-resilient and fast feature. By performing unitary operations under imperfect conditions, we witness the advantages of the NNGQC with measured fidelities by quantum process tomography in comparison with other two quantum gates by conventional NGQC and by straightforwardly dynamical evolution. Our results provide the first evidence confirming the possibility of accelerated quantum information processing with limited systematic errors even in the imperfect situation.
description: 7 pages, 4 figures, 1 table for main text, and 6 pages, 7 figures for Supplementary material
Gamma rays as probes of cosmic-ray propagation and interactions in galaxies
Creators: name: Tibaldo, Luigi
name: Gaggero, Daniele
name: Martin, Pierrick
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Continuum gamma-ray emission produced by interactions of cosmic rays with interstellar matter and radiation fields is a probe of non-thermal particle populations in galaxies. After decades of continuous improvements in experimental techniques and an ever-increasing sky and energy coverage, gamma-ray observations reveal in unprecedented detail the properties of galactic cosmic rays. A variety of scales and environments are now accessible to us, from the local interstellar medium near the Sun and the vicinity of cosmic-ray accelerators, out to the Milky Way at large and beyond, with a growing number of gamma-ray emitting star-forming galaxies. Gamma-ray observations have been pushing forward our understanding of the life cycle of cosmic rays in galaxies and, combined with advances in related domains, they have been challenging standard assumptions in the field and have spurred new developments in modelling approaches and data analysis methods. We provide a review of the status of the subject and discuss perspectives on future progress.
description: Accepted for publication in the Special Issue "High-Energy Gamma-Ray Astronomy: Results on Fundamental Questions after 30 Years of Ground-Based Observations" Universe MDPI https://www.mdpi.com/journal/universe/special_issues/gamma-ray_astronomy
A System Level Approach to Tube-based Model Predictive Control
Creators: name: Sieber, Jerome
name: Bennani, Samir
name: Zeilinger, Melanie N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Robust tube-based model predictive control (MPC) methods address constraint satisfaction by leveraging an a priori determined tube controller in the prediction to tighten the constraints. This paper presents a system level tube-MPC (SLTMPC) method derived from the system level parameterization (SLP), which allows optimization over the tube controller online when solving the MPC problem, which can significantly reduce conservativeness. We derive the SLTMPC method by establishing an equivalence relation between a class of robust MPC methods and the SLP. Finally, we show that the SLTMPC formulation naturally arises from an extended SLP formulation and show its merits in a numerical example.
description: 9 pages, 2 figures; revised version with reviewer feedback
Μελέτη μετρικών πολλαπλοτήτων επαφής με τη βοήθεια τανυστών καμπυλότητας
Creators: name: Τσολακίδου, Νίκη Κ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2002
Subjects: Μετρικές πολλαπλότητες επαφής
Σύμμορφα επίπεδες πολλαπλότητες Riemann
Πολλαπλότητες Κ-επαφής
Πολλαπλότητες Sasaki
Contact metric manifolds
Conformally flat Riemannian manifolds
K-contact manifolds
Sasakian manifolds

description: Μια πολλαπλότητα επαφής είναι μια C^(∞)-πολλαπλότητα Μ^(2n+1), η οποία φέρει μια ολικά ορισμένη 1-μορφη η τέτοια ώστε η Λ(dη)^(n)≠0. Η μελέτη των πολλαπλοτήτων επαφής από ολική άποψη αναπτύχθηκε τα τελευταία 50 χρόνια ξεκινώντας από την εργασία του G. Reeb επί των ιδιοτήτων των τροχιών των δυναμικών συστημάτων. Οι δομές επαφής έχουν εφαρμογές στην αναλυτική μηχανική και τη θεωρία κβαντοποίησης των B. Kostant, Z.-M. Souriav. Πρώτος ο S. Sasaki εισηγαγε με φυσικό τρόπο μια μετρική προσαρτημένη στη δομή επαφής. Ο χώρος των μετρικών των προσαρτημένων στη μορφή επαφής n είναι άπειρης διάστασης. Στην παρούσα διατριβή ασχολούμαστε με την ταξινόμηση δύο υποκλάσεων των μετρικών πολλαπλοτήτων επαφής. Στο πρώτο κεφάλαιο δίνονται οι ορισμοί και οι βασικές ιδιότητες των εννοιών που εμφανίζονται στη μελέτη. Στο δεύτερο κεφάλαιο μελετώνται σύμμορφα επίπεδες μετρικές πολλαπλότητες επαφής Μ^(2n+1)(φ,ξ,n,g)(n>1) με τη συνθήκη l=-kφ^(2), (l:=R(.,ξ)ξ), όπου k λεία συνάρτηση επί της Μ^(2n+1) και αποδεικνύεται ότι είναι πολλαπλότητες sasaki σταθερής καμπυλότητας 1. Στο τρίτο κεφάλαιο μελετώνται σύμμορφα επίπεδες μετρικές πολλαπλότητες επαφής Μ^(2n+1)(φ,ξ,η,γ)(n>1) με Qξ=ρξ, όπου ρ λεία συνάρτηση επί της Μ^(2n+1) και αποδεικνύεται ότι είναι πολλαπλότητες sasaki σταθερής καμπυλότητας 1.
description: A contact manifold is a C∞-manifold M^(2n+1) equipped with a global 1-form η, called the contact form, such that η^(dη)^(n)#0 every on M^(2n+1). The study of contact manifolds, from a global point of view, has been developed in the last 50 years, starting from the work of G. Reeb on properties of the trajectories of dynamical systems. The contact structures find applications in analytic mechanics and in the quantization theory of B. Kostant, Z.-M. Souriav. S. Sasaki introduced a natural metric assosiated to a contact structure. The set of assosiated metrics to η is of infinite dimension. In this thesis we classify two surclasses of contact metric manifolds. In the first chapter the definitions and the basic properties of conseptions which appear in the study are refered. In the second chapter we study conformally flat contact metric manifolds Μ^(2n+1)(φ,ξ,η,g)(n>1) with l=-kφ^(2), (l:=R(.,ξ)ξ), where k is a smooth function on Μ^(2n+1). We prove that these manifolds are Sasakian of constant curvature 1. In the third chapter we study conformally flat contact metric manifolds M^(2n+1)(φ,ξ,η,g)(n>1) with Qξ=ρξ, where ρ is a smooth function on M^(2n+1). We prove that these manifolds are Sasakian of constant curvature 1.
Survival of ALMA Rings in the Absence of Pressure Maxima
Creators: name: Jiang, Haochang
name: Ormel, Chris W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Recent ALMA observations have revealed that a large fraction of protoplanetary discs contain bright rings at (sub)millimeter wavelengths. Dust trapping induced by pressure maxima in the gas disc is a popular explanation for these rings. However, it is unclear whether such pressure bumps can survive for evolutionary time-scales of the disc. In this work, we investigate an alternative scenario, which involves only dust-gas interactions in a smooth gas disc. We postulate that ALMA rings are a manifestation of a dense, clumpy mid-plane that is actively forming planetesimals. The clumpy medium itself hardly experiences radial drift, but clumps lose mass by disintegration and vertical transport and planetesimal formation. Starting from a seed ring, we numerically solve the transport equations to investigate the ring's survival. In general, rings move outward, due to diffusion of the clump component. Without pressure support, rings leak material at rates $\sim$40 $M_\oplus\,\mathrm{Myr}^{-1}$ and in order for rings to survive, they must feed from an external mass reservoir of pebbles. In the case where the pebble size is constant in the disk, a cycle between ring formation and dispersion emerges. Rings produce large quantities of planetesimals, which could be material for planet formation and explain the massive budget inferred debris disc. Mock images of ALMA observations compare well to the rings of Elias 24 and AS 209 from DSHARP's sample.
description: 18 pages, 15 figures, Accepted for publication in MNRAS
Constructing consent : the emergence of corporatism within the Vancouver mental health system
Creators: name: Burnell, Thomas
Publisher: name: University of British Columbia
Year: 2008

description: An examination of developments between 1970-1990 demonstrate a substantial restructuring of relations between the state and nonprofit societies within Vancouver's mental health system. While helping to establish and support the growth of nonprofit societies, the state, during the 1970's, maintained a "hands off" relationship with the nonprofit sector. Throughout the 1980's and early 1990's, state intervention into the affairs and aspirations of nonprofit societies dramatically increased, primarily through the establishment of corporatist arrangements. Such arrangements necessitated the establishment of non-aligned intermediary organizations to regulate and monitor activities within the nonprofit sector. The establishment and development of nonprofit societies and the subsequent restructuring of relations between the state and nonprofit societies is explored through an examination of corporatism. This examination includes a detailed case study of two nonprofit societies operating in the city of Vancouver between 1972 to the present, the Coast Foundation Society and The Greater Vancouver Mental Health Services Society. The methodology utilized includes analysis of secondary data, archival and documentary materials, and personal interviews with a number of key informants previously or currently employed within the mental health system. Analytic themes from the literature on pluralism and corporatism, along with Claus Offe's theoretical examination of state-interest group relations, are used to explain the construction of corporatism during this period. While the inquiry provides a detailed account of developments within Vancouver's mental health system through a case study approach, broader issues are also explored. The impact of macro economic changes, especially the effect of the recessionary period during the 1970's, is crucial in understanding changing state priorities and the subsequent construction of corporatism. An understanding, therefore, of the way in which corporatism relates to the broader reconstruction of consensus within late capitalist societies is an important focus of this study.
Polarized Light Propagating in a Magnetic Field as a Probe of Millicharged Fermions
Creators: name: Gies, Holger
name: Jaeckel, Joerg
name: Ringwald, Andreas
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Possible extensions of the standard model of elementary particle physics suggest the existence of particles with small, unquantized electric charge. Photon initiated pair production of millicharged fermions in an external magnetic field would manifest itself as a vacuum magnetic dichroism. We show that laser polarization experiments searching for this effect yield, in the mass range below 0.1 eV, much stronger constraints on millicharged fermions than previously considered laboratory searches. Vacuum magnetic birefringence originating from virtual pair production gives a slightly better constraint for masses between 0.1 eV and a few eV. We comment on the possibility that the vacuum magnetic dichroism observed by PVLAS arises from pair production of such millicharged fermions rather than from single production of axion-like particles. Such a scenario can be confirmed or firmly excluded by a search for invisible decays of orthopositronium with a sensitivity of about 10^(-9) in the corresponding branching fraction.
description: 4 pages, 2 figures
Ανατροπές του οδυσσειακού μύθου στη λογοτεχνική και κινηματογραφική αφήγηση του 20ου αιώνα
Creators: name: Οικονόμου, Μαρία Τ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004

description: Η παρούσα μελέτη εξετάζει την πρόσληψη και ιδιαίτερα την ανατροπή, του οδυσσειακού μύθου στη νεότερη λογοτεχνία και τον κινηματογράφο, αφού προσεγγίσει πρώτα θεωρητικά την έννοια του λογοτεχνικού μύθου και την ιδιότυπη διακειμενικότητά του. Τρία κυρίως παραδείγματα(του Joyce, του Godard και του Kubrick) επιστρατεύονται για να καταδειχτεί η "ανατροπή" του μύθου, η οποία αφορά τόσο στο περιεχόμενο όσο και στη μορφή. Πλάι δηλαδή στη διάλυση του ηρωϊκού μοντέλου, πλάι στο διασυρμό του οδυσσειακού μύθου στο τετριμμένο και στο καθημερινό τα έργα χρησιμοποιούν την Οδύσσεια και ως μεταφορά μιας αισθητικής και μορφολογικής αναζήτησης αναιρώντας τις θεματικές και τεχνικές συμβάσεις της παράδοσης. Ακριβώς αυτό το διπλό ενδιαφέρον της νεοτερικής πρόσληψης της Οδύσσειας, τη θεματική δηλ. και μορφολογική ανατροπή, φαίνεται να απηχεί ένα ζεύγος μοτίβων, το οποίο λαμβάνει ιδιαίτερη σημασία στον 20ο αιώνα-πρόκειται για τις μυθικές μορφές των Σειρήνων και του Ελπήνορα. Ως κατεξοχήν αλληγορία της καλλιτεχνικής έκφρασης οι Σειρήνες, ακόμη κι όταν σιωπούν,(λ.χ. στους Rilke, Kafka, Brecht κ.ά.) βοηθούν να γίνει κατανοητό το πείραμα που αναζητά επαρκείς καλλιτεχνικές μορφές, η ποιητολογική Οδύσσεια. Ομοίως ο Ελπήνορας(λ.χ. στους Pound, Giraudoux, Σεφέρη κ.ά.) μπορεί να λογισθεί ως αλληγορία της ιδεολογικής ανατροπής του μύθου
description: The dissertation analyzes the role of the Odyssean myth in modernist literary and filmic art. It is based on a theoretical concept of myth as strictly historical and intertextual series which does not so much define the (ultimately indefinable) nature of myth, but serves to identify it as a phenomenon inside logos and dependent on its concrete narrational tradition. Three main adaptations of the Odysse by Joyce, Godard and Kubrick serve to illustrate different aspects of myth in literature and on the screen, specifying ideological transformations in the modernist epoch as well as exemplifying the close connection between thematic and poetological complexes of art. This double interest of 20th century's Odysseu texts is reflected in the dissertation's last two parts that model the mythical figure of Elpenor and the Sireus as key-allegories for modern narrative stratiges : the increasingly central position of Elpenor(in Pound, Giraudoux, Seferis a.o.) thereby demonstrates an ideological subversion and trivialization of myth ; the sireus - and their silence(in Rilke, Kafka, Brecht)-must be read as paradigmatic for an autoreflexive problematization a language and the quest for alternative modern poetics
Introduction to bibliometric data sources: Google Scholar
Creators: name: Robinson-García, Nicolás
name: , Torres-Salinas
Publisher: name: Zenodo
Year: 2019
Subjects: Google Scholar

description: In this third part we will discuss alternative data sources that can be used for bibliometric purposes. Specifically, we will address Google Scholar and Microsoft Academic. After describing each of these sources, we will present the different services they offer, the use that has been made for each service and describe their main features. Their strengths and weaknesses will be discussed and compared with other bibliometric tools. Finally, we will reflect on their potential use for research evaluation purposes.
Asymmetric Tsallis distributions for modelling financial market dynamics
Creators: name: Devi, Sandhya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business

description: Financial markets are highly non-linear and non-equilibrium systems. Earlier works have suggested that the behavior of market returns can be well described within the framework of non-extensive Tsallis statistics or superstatistics. For small time scales (delays), a good fit to the distributions of stock returns is obtained with q-Gaussian distributions, which can be derived either from Tsallis statistics or superstatistics. These distributions are symmetric. However, as the time lag increases, the distributions become increasingly non-symmetric. In this work, we address this problem by considering the data distribution as a linear combination of two independent normalized distributions - one for negative returns and one for positive returns. Each of these two independent distributions are half q-Gaussians with different non-extensivity parameter q and temperature parameter beta. Using this model, we investigate the behavior of stock market returns over time scales from 1 to 80 days. The data covers both the .com bubble and the 2008 crash periods. These investigations show that for all the time lags, the fits to the data distributions are better using asymmetric distributions than symmetric q-Gaussian distributions. The behaviors of the q parameter are quite different for positive and negative returns. For positive returns, q approaches a constant value of 1 after a certain lag, indicating the distributions have reached equilibrium. On the other hand, for negative returns, the q values do not reach a stationary value over the time scales studied. In the present model, the markets show a transition from normal to superdiffusive behavior (a possible phase transition) during the 2008 crash period. Such behavior is not observed with a symmetric q-Gaussian distribution model with q independent of time lag.
description: 13 figures, 28 pages
Streetonomics: Quantifying Culture Using Street Names
Creators: name: Bancilhon, Melanie
name: Constantinides, Marios
name: Bogucka, Edyta Paulina
name: Aiello, Luca Maria
name: Quercia, Daniele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Quantifying a society's value system is important because it suggests what people deeply care about -- it reflects who they actually are and, more importantly, who they will like to be. This cultural quantification has been typically done by studying literary production. However, a society's value system might well be implicitly quantified based on the decisions that people took in the past and that were mediated by what they care about. It turns out that one class of these decisions is visible in ordinary settings: it is visible in street names. We studied the names of 4,932 honorific streets in the cities of Paris, Vienna, London and New York. We chose these four cities because they were important centers of cultural influence for the Western world in the 20th century. We found that street names greatly reflect the extent to which a society is gender biased, which professions are considered elite ones, and the extent to which a city is influenced by the rest of the world. This way of quantifying a society's value system promises to inform new methodologies in Digital Humanities; makes it possible for municipalities to reflect on their past to inform their future; and informs the design of everyday's educational tools that promote historical awareness in a playful way.
description: 17 pages, 6 figures, 2 tables
Η αισθητική και λειτουργική διαμόρφωση των διακοσμητικών τεχνών και της αρχιτεκτονικής από τη Βιομηχανική Επανάσταση στην Αγγλία (1760) μέχρι και την πρώϊμη περίοδο του Μοντερνισμού στην Ευρώπη και τις Η.Π.Α. (1914)
Creators: name: Τσούμας, Γιάννης
Publisher: name: Aristotle University of Thessaloniki
Year: 2002
Subjects: subject: Αισθητική
subject: Λειτουργικότητα
subject: Διακοσμητικές τέχνες
subject: Αρχιτεκτονική
subject: Βιομηχανική επανάσταση
subject: Μοντερνισμός
subject: Aesthetics
subject: Functionality
subject: Decorative arts
subject: Architecture
subject: FOS: Civil engineering
subject: Industrial revolution
subject: Modernism

description: Κύριος στόχος του έργου είναι η κάλυψη (μέσα από εκτεταμένη βιβλιογραφική μελέτη όσο και από τη χρήση εμπειρικού υλικού) της ιστορικής διαδρομής, ανάλυσης, τεκμηρίωσης-και εκάστοτε αμφισβήτησης-της πορείας των διακοσμητικών τεχνών και τηε αρχιτεκτονικής από τη Βιομηχανική Επανάσταση στην Αγγλία (1760) έως και την πρώϊμη φάση του Μοντερνισμού στην Ευρώπη και τις Η.Π.Α. (1914). Κινήματα, ιστορικοί σταθμοί, κύριοι εκφραστές αυτών-η ιδεολογία και το έργο τους-μελετώνται και σχολιάζονται εμπεριστατωμένα, κάτω απο μια περισσότερο αισθητικολειτουργική παρά κοινωνιολογική μεθοδολογική προσέγγιση. Δηλαδή ο συγγραφέας, αποφεύγοντας τα δύσβατα και επικίνδυνα μονοπάτια όπου θα τον οδηγούσε μια κοινωνιολογική μεθοδολογία για την έρευνα μιας τόσο εκτεταμένης ιστορικής και πλούσιας σε γεγονότα περιόδου, εστιάζει σε συγκεκριμένη μεθοδολογία που παραπέμπει στην ανάλυση και την οργάνωση του υλικού του βάσει των αρχών και των θεωριών της αισθητικής και της λειτουργικότητας. Ο στόχος του καλύπτεται από τα συμπεράσματα-αποτελέσματα της συνολικής πορείας του έργου που παρατίθενται στον επίλογο του βιβλίου.
description: The main task of this work is the coverage (through an extensive bibliography and the analogous use of emperical material) of the historical route, analysis and understanding of the decorative arts and architecture from the Industrial Revolution in England (1760) until the early period of Modernism in Europe and the U.S.A. (1914). Important movements - landmarks in the history of the Decorative Arts-their main representatives- as well as their ideology, philosophy and works- are studied and examined in detail under a more functional - aesthetic prism than a cultural - social methodological approach. That is, the writer avoided the dangerous paths of a social methodological approach just because of the length and the density of such a historical period, so he focused on a rather aesthetical/functional methodology. The task of the work seems to be achieved and this is shown in the results of the research which are given mainly in the epilogue.
Lessons from BaBar and Belle measurements of D-Dbar mixing parameters
Creators: name: Nir, Yosef
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The BaBar and Belle experiments have recently presented evidence for D-Dbar mixing. We explain the following points: (i) The measurements imply width difference $y \sim 0.01$. In the limit of small CP violation, the CP-odd state is longer-lived; (ii) $y\sim0.01$ is consistent with the Standard Model. It suggests that SU(3) breaking from phase space effects is likely to play a major role; (iii) There is no evidence for either large mass splitting or CP violation. Consequently, there is no hint for new physics; (iv) The stronger bounds on the mass splitting and on CP violation imply that, if squarks are observed at the LHC, it is unlikely that they will be non-degenerate.
description: 16 pages; v2: additional references, minor corrections in sections III and IV.B.
Hefty enhancement of cosmological constraints from the DES Y1 data using a Hybrid Effective Field Theory approach to galaxy bias
Creators: name: Hadzhiyska, Boryana
name: García-García, Carlos
name: Alonso, David
name: Nicola, Andrina
name: Slosar, Anže
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a re-analysis of cosmic shear and galaxy clustering from first-year Dark Energy Survey data (DES Y1), making use of a Hybrid Effective Field Theory (HEFT) approach to model the galaxy-matter relation on weakly non-linear scales, initially proposed in Modi et al. (2020) (arXiv:1910.07097). This allows us to explore the enhancement in cosmological constraining power enabled by extending the galaxy clustering scale range typically used in projected large-scale structure analyses. Our analysis is based on a recomputed harmonic-space data vector and covariance matrix, carefully accounting for all sources of mode-coupling, non-Gaussianity and shot noise, which allows us to provide robust goodness-of-fit measures. We use the \textsc{AbacusSummit} suite of simulations to build an emulator for the HEFT model predictions. We find that this model can explain the galaxy clustering and shear data up to wavenumbers $k_{\rm max}\sim 0.6\, {\rm Mpc}^{-1}$. We constrain $(S_8,Ω_m) = (0.786\pm 0.020,0.273^{+0.030}_{-0.036})$ at the fiducial $k_{\rm max}\sim 0.3\, {\rm Mpc}^{-1}$, improving to $(S_8,Ω_m) = (0.786^{+0.015}_{-0.018},0.266^{+0.024}_{-0.027})$ at $k_{\rm max}\sim 0.5\, {\rm Mpc}^{-1}$. This represents a $\sim10\%$ and $\sim35\%$ improvement on the constraints derived respectively on both parameters using a linear bias relation on a reduced scale range ($k_{\rm max}\lesssim0.15\,{\rm Mpc}^{-1}$), in spite of the 15 additional parameters involved in the HEFT model. We investigate whether HEFT can be used to constrain the Hubble parameter and find $H_0= 70.7_{-3.5}^{+3.0}\,{\rm km}\,s^{-1}\,{\rm Mpc}^{-1}$. Our constraints are investigative and subject to certain caveats discussed in the text.
description: Prepared for JCAP; 29 pages, 7 figures, 3 tables
Η πολιτισμική ταυτότητα των ελλήνων στην Πελαγονία (1912-1930)
Creators: name: Βασιλειάδης, Νικόλαος Α.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Πολιτισμική παρουσία
Ελληνες Πελαγονίας
Καθεστωτική μεταβολή
Συμπεριφορές
Αντιδράσεις
Ομογενοποίηση-Απεθνικοποίηση
Cultural presence
Greeks of Pelagonia
Change of regime
Behaviours
Reactions
Homogenized-Denasionalization

description: Η περι ης ο λόγος διατριβή καταπιάνεται με την πολιτισμική παρουσία των ελλήνων κατά τη χρονική περίοδο από το τέλος του 1912 έως το τέλος της πρώτης δεκαετίας του μεσοπολέμου (1930) στο γεωπολιτικό χώρο της Πελαγονίας (Νότιας Σερβίας). Εξιστορείται η νέα πολιτική πραγματικότητα και τα νέα καθεστωτικά δεδομένα (Σερβική κυριαρχία). Επιχειρείται να ερευνηθεί μια πτυχή της νεώτερης ελληνικής ιστορίας που ξεφευγει της ιστορικής γραφίδας. Αναλύεται η πολιτισμική παρουσία των ελλήνων της Πελαγονίας στο εκπαιδευτικό πεδίο, η κοινωνική τους κατάσταση, η οικονομική τους θέση, το καθεστώς μιας εθνοτικής ομάδας. Για τη συγγραφή της χρησιμοποιήθηκε κυρίως πρωτογενές υλικό αρχειακών πηγών, λόγω έλλειψης βιβλιογραφικής ενημέρωσης. Μέσα σ'αυτά τα πλαίσια αναλύεται η πολιτισμική παρουσία σε τέσσερα επίπεδα: α) τον Σερβικό παράγοντα, β) την επιρροή του ελληνικού κράτους, γ) το ρόλο του Οικουμενικού Πατριαρχείου, δ) τη διεκδίκηση των μειονοτικών δικαιωμάτων στα διεθνή φορα, όπου αποκαλύπτονται οι συμπεριφορές και οι αντιδράσεις όλων των εμπλεκομένων παραγόντων.
description: The particular dissertation deals with the cultural presence of Hellenism during time period since the end of 1912 till the end of first decate of midwar (1930) in the geopolitical area of pelagonia (South Serbia). Is described the new political reality and the new regime facts (Serbia Domination). An attempt is made to investigate a part of new hellenic history which escapes of historial writing. The cultural presence of hellenism of pelagonia is analysed to educational sector, the social condition, the financial condition, the regime of one ethnic group. For the composition material archives sources was used, because of shortage bibliographical updating. In these frames the cultural presence is analysed in four levels: a)Serbian factor, b)the influence of hellenic state, c)the role of Patriarchate, d)the claimant of wrights of minority to international fora, where the behaviours and the reactions of all factors become known.
Διαλειμματική προπόνηση σε κυκλοεργόμετρο και λειτουργικές προσαρμογές καλαθοσφαιριστών προεφηβικής και εφηβικής ηλικίας
Creators: name: Γαλαζούλας, Χρήστος
Publisher: name: Aristotle University of Thessaloniki
Year: 2003
Subjects: Προπόνηση μυϊκής ενδυνάμωσης
Κυκλοεργόμετρο
Strength training
Cycle-ergometer

description: Σκοπός της έρευνας ήταν να εξεταστούν οι λειτουργικές προσαρμογές στη δυναμική μυϊκή δύναμη που επέρχονται ως αποτέλεσμα της προπόνησης στο κυκλοεργόμετρο και ο βαθμός των αλληλεπιδράσεων σε άλλους τύπους δύναμης και μυϊκής αντοχής σε προέφηβους και έφηβους καλαθοσφαιριστές. Στη μελέτη συμμετείχαν 46 υγιείς προέφηβοι και έφηβοι καλαθοσφαιριστές οι οποίοι χωρίστηκαν σε 4 ομάδες άσκησης μια ομάδα 11χρονων και μια ομάδα 13χρονων και 2 αντίστοιχες ομάδες ελέγχου. Το πρόγραμμα προπόνησης εφαρμόζονταν 3 φορές την εβδομάδα για 10 εβδομάδες. Διαρκούσε 50-55 λεπτά και περιλάμβανε 10' προθέρμανση 6Χ2 λεπτά άσκηση στο κυκλοεργόμετρο με υψηλή ένταση 80-85% max με 4' διάλειμμα. Ολοι οι αθλητές μετρήθηκαν στο ισοκινητικό δυναμόμετρο cybex II στις γωνιακές ταχύτητες των 30,60,120,180 και 300^(ο).s^(-1), στη μέγιστη ισομετρική δύναμη καθώς και στην ισομετρική και ισοκινητική αντοχή. Τα αποτελέσματα έδειξαν σημαντικές βελτιώσεις σε όλες τις γωνιακές ταχύτητες, καθώς και στην ισομετρική δύναμη και ισομετρική και ισοκινητική αντοχή για τις ομάδες άσκησης, ενώ οι ομάδες ελέγχου παρουσίασαν βελτιώσεις μόνο στις υψηλές γωνιακές ταχύτητες στη δυναμική μυϊκή δύναμη
description: The aim of this research was to examine the functional adaptations in the potent muscular power which result from the muscular strngth training in cycle-ergometer, as well as the level of interactions in the shapes of muscular power and the muscular resistance in pre-adolescent and adolescent basketball players. In this work 46 healthy pre-adeolescents, adolescents basketball players aged 11 and 13 years which were separated in two research groups(11and 13) and in two control groups(11 and 13 years). The training schedule lasted 50 to 55 minutes, 3 times a week for 10 weeks 6X2 minutes in cycle ergometer with high loading (80-85% max) alternating with interrals of 4 minutes of lower intensity. All athletes were measured in isokinetic dynamomoter before the end of the 10 weeks period in the maximum isokinetic strength of knee extensors and flexorsin angles speeds 30,60,120,180 and 300^(o).s^(-1) in maximum isometric strength and endurance and isokinetic endurance. From the results we conclude that the protocol of strength training which was applied in the cycle-ergometer is a challenge to improve the potent muscular strenght as well as the interactions in the sorts of muscular strength and endurance
Διερεύνηση των φυσιολογικών παραγόντων που επηρρεάζουν τον πολλαπλασιασμό των αυτοφυών καλλωπιστικών φυτών τάξου (Taxusbaccata L.) και κουμαριάς (Arbutus Unedo L.)
Creators: name: Μεταξάς, Δημήτριος Ι.
Publisher: name: Aristotle University of Thessaloniki
Year: 2004
Subjects: Μοσχεύματα
Πολλαπλασιασμός
Υπεροξειδάσες
Ριζοβολία
Cuttings
Propagation
Peroxidases
Rooting

description: Ο τάξος (Taxus baccata L.) και η κουμαριά (Arbutus unedo L.) είναι αυτοφυείς θάμνοι της χώρας μας και τα τελευταία χρόνια παρατηρείται αυξημένη ζήτησή τους στην αγορά. Για το λόγο αυτό έγιναν προσπάθειες για τη βελτίωση του πολλαπλασιασμού με μοσχεύματα των δύο αυτών φυτικών ειδών. Εξετάστηκε η επίδραση στη ριζοβολία του φυτικού ρυθμιστή, του τύπου του μοσχεύματος και ορισμένων ακόμη παραγόντων, ενώ παράλληλα εξετάστηκε ο ρόλος των φυτικών ρυθμιστών και του γενοτύπου στη μεταβολή της δράσης των υπεροξειδασών και φωσφατασών, ενζύμων που εμπλέκονται στη ριζοβολία. Ο φυτικός ρυθμιστής έπαιξε σημαντικό ρόλο στη ριζοβολία των μοσχευμάτων τόσο του τάξου όσο και της κουμαριάς. Καλύτερα αποτελέσματα επιτεύχθηκαν με χρήση επάκριων μοσχευμάτων μέσης διαμέτρου στόν τάξο και μικρής διαμέτρου στην κουμαριά. Η επίδραση του γενοτύπου αποδείχθηκε πολύ σημαντική και στα δύο φυτικά είδη. Η μη αποφύλλωση της βάσης των μοσχευμάτων στον τάξο είχε θετικά αποτελέσματα. Το σύστημα της ομίχλης έδωσε καλύτερα αποτελέσματα ενώ καλύτερη εποχή ήταν ο Αύγουστος για τον τάξο και καλοκαίρι-φθινόπωρο για την κουμαριά.
description: Taxus baccata L. (yew) and Arbutus unedo L. (strawberry tree) are native shrubs in Greece and recently there is an increasing demand for these species in the market. For this reason a study was undertaken to improve propagation through cuttings in these two plant species. The influence of growth regulators on rooting was examined and the effect of some other factors were evaluated. In addition, the role of different growth regulators and various genotypes on peroxidase and phosphatase activity modification and isoenzyme pattern during rooting were examined. The treatment of cuttings with auxin had a strong influence on the rooting of these cuttings in both species. In taxus, apical cuttings from current season growth of medium stem diameter achieved the highest rooting percentages. On the other hand, in Arbutus, apical cuttings from thin shoots rooted better than cuttings from thick shoots. The genotype had a strong influence on rooting percentage and rooting quality in both plant species. In taxus, rooting percentage was greater without the usual defoliation of cutting base prior to insertion into the rooting medium. Sand was proved to be the least suitable rooting medium and the fogsystem gave better results on rooting than intermittent mist of cuttings in both plantspecies. In taxus, the best results were obtained in cuttings collected in August. In Arbutus, the best results were obtained in cuttings collected in July through November.
Three-dimensional structure of the laser wakefield accelerator in the blowout regime
Creators: name: Vieira, J. F.
name: Martins, S. F.
name: Fiuza, F.
name: Fonseca, R. A.
name: Silva, L. O.
name: Huang, C.
name: Lu, W.
name: Tzoufras, M.
name: Tsung, F. S.
name: Mori, W. B.
name: Cooley, J.
name: Antonsen, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Three-dimensional Particle-in-Cell (PIC) simulations with the code QuickPIC are used to illustrate the typical accelerating structures associated with the interaction of an intense laser beam with an underdense plasma in the blowout regime. Our simulations are performed with an externally injected electron beam, positioned in the region of maximum accelerating gradients. As the laser propagates in the plasma, almost complete electron cavitation occurs, leading to the generation of accelerating fields in excess of 1 GeV/cm.
description: 2 pages, 1 figure, accepted for publication IEEE TPS Special Issue Images in Plasma Science
Subcritical Andronov-Hopf scenario for systems with a line of equilibria
Creators: name: Korneev, Ivan A.
name: Slepnev, Andrei V.
name: Vadivasova, Tatiana E.
name: Semenov, Vladimir V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: Using numerical simulation methods and analytical approach, we demonstrate hard self-oscillation excitation in systems with infinitely many equilibrium points forming a line of equilibria in the phase space. The studied bifurcation phenomena are equivalent to the excitation scenario via the subcritical Andronov-Hopf bifurcation observed in classical self-oscillators with isolated equilibrium points. The hysteresis and bistability accompanying the discussed processes are shown and explained. The research is carried out on an example of a nonlinear memristor-based self-oscillator model. First, a simpler model including Chua's memristor with a piecewise-smooth characteristic is explored. Then the memristor characteristic is changed to a function being smooth everywhere. Finally, the action of the memristor forgetting effect is taken into consideration.
description: 8 Pages, 6 Figures
Additional file 1 of Prevalence of cervicovaginal human papillomavirus infection and genotype distribution in Shanghai, China
Creators: name: Li, Xiaoxiao
name: Xiang, Fenfen
name: Dai, Junhua
name: Zhang, Tao
name: Chen, Zixi
name: Zhang, Mengzhe
name: Wu, Rong
name: Kang, Xiangdong
Publisher: name: figshare
Year: 2022
Subjects: subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: Additional file 1. Prevalence of cervicovaginal human papillomaviruses  stratified by age and geographical areas.
Spin Glass Stiffness in zero Dimensions
Creators: name: Boettcher, Stefan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: A unique analytical result for the Migdal-Kadanoff hierarchical lattice is obtained. The scaling of the defect energy for a zero-dimensional spin glass is derived for a bond distribution that is continuous at the origin. The value of the ``stiffness'' exponent in zero dimensions, y_0=-1, corresponds to the value also found in one dimension. This result complements and completes earlier findings for y_d at d>0.
description: RevTex, 8 pages, 4 ps-figures included, related articles can be found at http://www.physics.emory.edu/faculty/boettcher
Identification of risk factors associated with cervical Intra-epithelial Neoplasia among women in British Columbia
Creators: name: Chew, Danielle Siew Yee
Publisher: name: University of British Columbia
Year: 2008

description: Multiple etiologic factors have been described for invasive cervical cancer. The most important ones being sexual activity and smoking. Less is known regarding the factors predisposing to risk of Cervical Intraepithelial Neoplasia (CIN). The increasing incidence among women prompted a study of this disease in British Columbia in carrying out a case control study to identify the risk factors associated with the disease. Incidentally, that is the main focus of this paper. A case-control design was used with cases and controls identified from the Cytology database of the British Columbia Cancer Agency which contains a complete record of all cervical cytology done in British Columbia. Cases were women with diagnosis of cervical dysplasia or carcinoma in-situ whereas controls were women with no history of cervical abnormality. Estimates of the relative risk together with its 95% confidence interval are obtained from the maximum likelihood estimates of the binary logistic regression models. The important risks factors associated with CIN that have been identified in this study are current cigarette smoking, sexual frequency, number of different lifetime sexual partners, combine usage of both condom and diaphragm and dietary intake of vitamin A.
Persistent current of atoms in a ring optical lattice
Creators: name: Kolovsky, Andrey R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider a small ensemble of Bose atoms in a ring optical lattice with weak disorder. The atoms are assumed to be initially prepared in a superfluid state with non-zero quasimomentum and, hence, may carry matter current. It is found that the atomic current persists in time for a low value of the quasimomentum but decays exponentially for a high (around one quater of the Brillouin zone) quasimomentum. The explanation is given in terms of low- and high-energy spectra of the Bose-Hubbard model, which we describe using the Bogoliubov and random matrix theories, respectively.
description: 17 pages, IOP-style