cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On a stationary spinning string spacetime
Creators: name: Culetu, Hristu
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The properties of a stationary massless string endowed with intrinsic spin are discussed. The spacetime is Minkowskian geometrically but the topology is nontrivial due to the horizon located on the surface $r=0$, similar with Rindler's case. For $r$ less than the Planck length $b$, $g_{ϕϕ}$ has the same sign as $g_{tt}$ and closed timelike curves are possible. We assume an elementary particles' spin originates in the frame dragging effect produced by the rotation of the source. The Sagnac time delay is calculated and proves to be constant.
description: revised version of hep-th/0602014 v1, 7 pages, title changed, sec.5 removed, talk given at "Recent Developments in Gravity" (NEB XII), Nafplio, Greece, 29 June 2006
Exact mean-field theory explains the dual role of electrical synapses in collective synchronization
Creators: name: Montbrió, Ernest
name: Pazó, Diego
Publisher: name: arXiv
Year: 2020
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Electrical synapses play a major role in setting up neuronal synchronization, but the precise mechanisms whereby these synapses contribute to synchrony are subtle and remain elusive. To investigate these mechanisms mean-field theories for quadratic integrate-and-fire neurons with electrical synapses have been recently put forward. Still, the validity of these theories is controversial since they assume that the neurons produce unrealistic, symmetric spikes, ignoring the well-known impact of spike shape on synchronization. Here we show that the assumption of symmetric spikes can be relaxed in such theories. The resulting mean-field equations reveal a dual role of electrical synapses: First, they equalize membrane potentials favoring the emergence of synchrony. Second, electrical synapses act as "virtual chemical synapses", which can be either excitatory or inhibitory depending upon the spike shape. Our results offer a precise mathematical explanation of the intricate effect of electrical synapses in collective synchronization. This reconciles previous theoretical and numerical works, and confirms the suitability of recent low-dimensional mean-field theories to investigate electrically coupled neuronal networks.
Arithmeticity of totally geodesic Lie foliations with locally symmetric leaves
Creators: name: Quiroga-Barranco, Raul
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C12

description: R. Zimmer proved that, on a compact manifold, a foliation with a dense leaf, a suitable leafwise Riemannian symmetric metric and a transverse Lie structure has arithmetic holonomy group. In this work we improve such result for totally geodesic foliations by showing that the manifold itself is arithmetic. This also gives a positive answer, for some special cases, to a conjecture of E. Ghys.
Alternating groups and moduli space lifting Invariants
Creators: name: Fried, Michael D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F32 (Primary), 11G18, 11R58, 20B05 (Secondary), 20C25, 20D25, 20E18, 20F34

description: Main Theorem: Spaces of r-branch point 3-cycle covers, degree n or Galois of degree n!/2 have one (resp. two) component(s) if r=n-1 (resp. r\ge n). Improves Fried-Serre on deciding when sphere covers with odd-order branching lift to unramified Spin covers. We produce Hurwitz-Torelli automorphic functions on Hurwitz spaces, and draw Inverse Galois conclusions. Example: Absolute spaces of 3-cycle covers with +1 (resp. -1) lift invariant carry canonical even (resp. odd) theta functions when r is even (resp. odd). For inner spaces the result is independent of r. Another use appears in, http://www.math.uci.edu/~mfried/paplist-mt/twoorbit.html, "Connectedness of families of sphere covers of A_n-Type." This shows the M(odular) T(ower)s for the prime p=2 lying over Hurwitz spaces first studied by, http://www.math.uci.edu/~mfried/othlist-cov/hurwitzLiu-Oss.pdf, Liu and Osserman have 2-cusps. That is sufficient to establish the Main Conjecture: (*) High tower levels are general-type varieties and have no rational points.For infinitely many of those MTs, the tree of cusps contains a subtree -- a spire -- isomorphic to the tree of cusps on a modular curve tower. This makes plausible a version of Serre's O(pen) I(mage) T(heorem) on such MTs. Establishing these modular curve-like properties opens, to MTs, modular curve-like thinking where modular curves have never gone before. A fuller html description of this paper is at http://www.math.uci.edu/~mfried/paplist-cov/hf-can0611591.html .
description: To appear in the Israel Journal as of 1/5/09; v4 is corrected from proof sheets, but does include some proof simplification in \S 4
Περιοδικότητα σε χρονοσειρές και εφαρμογές
Creators: name: Βούρης, Αγγελος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Περιοδικότητα
Συστηματική Δειγματοληψία
Αμοιβαία Πληροφορία
Periodicity
Systematic Sampling
Mutual Information

description: Η μελέτη της περιοδικότητας των φαινομένων είναι κομμάτι του τομέα της Στατιστικής. Επιπλέον, η ανακάλυψη της δομής του γενετικού υλικού έδωσε ώθηση στην επιστημονική κοινότητα και πρόσφορο έδαφος στην αναζήτηση εφαρμογών περιοδικότητας στην αλληλουχία βάσεων του DNA. Αρχικά, λοιπόν, περιγράφεται η διαδικασία επιλογής δείγματος, κάνοντας μια αναφορά στις μεθόδους δειγματοληψίας. Στη συνέχεια παρουσιάζεται η έννοια της περιοδικότητας, δίνονται κάποιοι βασικοί ορισμοί και θεωρήματα και ο αλγόριθμος για τον εντοπισμό της περιόδου σε ταξινομημένα δεδομένα, που βασίζεται στη συστηματική δειγματοληψία. Επιπρόσθετα, γίνεται μια προσέγγιση στη μελέτη της ειδικής περίπτωσης όπου τα ταξινομημένα δεδομένα της ακολουθίας είναι τοποθετημένα με τέτοιο τρόπο ώστε να έχουν περιοδικότητα ίση με τέσσερα. Στην παρούσα διπλωματική εργασία στόχος είναι η εξέταση εύρεσης όχι μόνο απλής αλλά και λανθάνουσας περιοδικότητας με τη μέθοδο εύρεσης περιοδικότητας με συστηματική δειγματοληψία. Παρουσιάζεται επίσης η μέθοδος εύρεσης περιοδικότητας που βασίζεται στην αμοιβαία πληροφορία και στην αποσύνθεση πληροφορίας. Εφαρμόζονται οι κατάλληλοι αλγόριθμοι και παρουσιάζονται αποτελέσματα από παραδείγματα κατασκευασμένων ακολουθιών και πραγματικών ακολουθιών DNA με συστηματικές και τυχαίες αλλαγές. Προτείνεται ένας νέος τρόπος για την ευκρίνεια της μεθόδου. Τέλος γίνεται σύγκριση της μεθόδου με συστηματική δειγματοληψία και αυτής με την αμοιβαία πληροφορία.
description: The study of periodicity in phenomena is an integral part of statistics. Moreover, the discovery of the structure of genetic material boosted the scientific community and gave breeding ground to seek after any applicability of periodicity in the nucleotides’ sequence. Firstly, is presented the process of selecting a sample, after a short reference to sampling methods. Then, the meaning of periodicity is presented; some basic definitions and theorems are given and an algorithm for finding the period in labeled data series is proposed, that is based in systematic sampling. In addition, is being approached a study in a special case, where the labeled data series are fitted with period equal to four. In this paper, the purpose is to examine if the searching periodicities method with systematic sampling is accurate to find not only simple periodicity but latent as well. Also, the searching periodicities method that based in mutual information and information decomposition is presented. The proper algorithms are applied and come up results from constructed and real DNA sequences examples, even with systematic changes or random changes. A new way for the method’s sharpness is suggested. Finally, the systematic sampling method and the mutual information method are being compared.
Quantum interference of electromagnetic fields from remote quantum memories
Creators: name: Chaneliere, T.
name: Matsukevich, D. N.
name: Jenkins, S. D.
name: Lan, S. -Y.
name: Zhao, R.
name: Kennedy, T. A. B.
name: Kuzmich, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We observe quantum, Hong-Ou-Mandel, interference of fields produced by two remote atomic memories. High-visibility interference is obtained by utilizing the finite atomic memory time in four-photon delayed coincidence measurements. Interference of fields from remote atomic memories is a crucial element in protocols for scalable generation of multi-node remote qubit entanglement.
description: 4 pages, 3 figures
Grain-Boundary Topological Phase Transitions
Creators: name: Chen, Kongtao
name: Srolovitz, David J.
name: Han, Jian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The formation and migration of disconnections (line defects constrained to the grain boundary (GB) plane with both dislocation and step character) control many of the kinetic and dynamical properties of GBs and the polycrystalline materials of which they are central constituents. We demonstrate that GBs undergo a finite-temperature topological phase transition of the Kosterlitz-Thouless (KT) type. This phase transition corresponds to the screening of long-range interactions between (and unbinding of) disconnections. This phase transition leads to abrupt change in the behavior of GB migration, GB sliding, and roughening. We analyze this KT transition through mean-field theory, renormalization group theory, and kinetic Monte Carlo simulations, and examine how this transition affects microstructure-scale phenomena such as grain growth stagnation, abnormal grain growth and superplasticity.
Property concepts and institutions in China: does tradition abide?
Creators: name: Kremzner, Mark Thaddeus
Publisher: name: University of British Columbia
Year: 2009

description: The premise of this paper is that in order to understand contemporary concepts and institutions of property in China one needs to be aware of the historical approaches towards the ownership and management of resources and assets. Legal institutions are a reflection of the ideological and material conditions of a society. The persistence or reappearance of these conditions suggests that there may be some similarities between traditional, primarily Confucian, and contemporary post-Maoist property concepts and institutions. This paper explores the social, economic and ideological basis of imperial era concepts of ownership and management of land resources and investigates the interaction between state and society, or the official and private spheres. The research here demonstrates that despite officially held ideas of imperial land ownership, most land effectively was owned by actors within the private sphere by at least the early to mid-Qing. Nevertheless, the concept of ownership emphasized the community as opposed to the individual, and thus the notion of private exclusive rights in resources such as land significantly was minimal. Property institutions frequently resembled trusts or corporations, which were characterized by a separation of ownership and management powers or rights. This does not imply however that the separation was a clear one. Like contemporary uncertainties surrounding the division of ownership and management rights in state enterprises, late imperial institutions did not clearly define how a resource was to be managed. Generally such determinations must be made on a case by case basis.
Κοινωνικά δίκτυα και διδασκαλία/ εκμάθηση ξένης γλώσσας. Η θέση τους στη δημόσια δευτεροβάθμια εκπαίδευση.
Creators: name: Παπαχαρίτου, Χριστίνα Χαρίτων
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Κοινωνικά δίκτυα
Ξένες γλώσσες
Web 2.0 εργαλεία
Social networks
Foreign languages
Web 2.0 tools

description: Τα web 2.0 εργαλεία όπως είναι τα κοινωνικά δίκτυα, τα ιστολόγια και τα wikis χρησιμοποιούνται πλέον ευρύτατα στην εκπαίδευση. Η παρούσα διπλωματική εργασία πραγματεύεται το ρόλο των κοινωνικών δικτύων στο μάθημα της ξένης γλώσσας και διαρθρώνεται σε τέσσερα κεφάλαια. Το πρώτο κεφάλαιο αποσκοπεί στην αποσαφήνιση του όρου web 2.0 ενώ το δεύτερο παρουσιάζει τις σημαντικότερες web 2.0 εφαρμογές ενταγμένες σε ένα εκπαιδευτικό πλαίσιο. Στo επόμενο κεφάλαιο εξετάζεται η αξία των κοινωνικών δικτύων στη διδακτική πράξη και δίνεται έμφαση στους τρόπους με τους οποίους δύνανται να συμβάλλουν στη βελτίωση της εκπαιδευτικής διαδικασίας, μέσα από παραδείγματα καλών πρακτικών που αφορούν τη διδασκαλία της ξένης γλώσσας. Το τέταρτο και τελευταίο κεφάλαιο αυτής της μελέτης αφιερώνεται στην έρευνα που πραγματοποιήθηκε στα σχολεία της δευτεροβάθμιας εκπαίδευσης του νομού Θεσσαλονίκης, με θέμα προς διερεύνηση το βαθμό αξιοποίησης των κοινωνικών δικτύων στο ξενόγλωσσο μάθημα. Στο κεφάλαιο αυτό περιλαμβάνονται τα αποτελέσματα της έρευνας και τα κυριότερα συμπεράσματα που εξήχθησαν. Τέλος, επιπλέον προτάσεις για περαιτέρω έρευνα και ανάλυση παρέχονται στον επίλογο.
description: Web 2.0 tools such as social networks, blogs and wikis are now widely used in education. This thesis deals with the role of the social networks in the foreign language lesson and is divided into four chapters. The purpose of the first chapter is to clarify the term web 2.0 while the second one presents the most important web 2.0 applications in an educational context. The next chapter examines the value of social networks in teaching and gives emphasis on the ways in which they can help to improve the educational process by providing examples of best practices concerning foreign language teaching. The fourth and final chapter of the study is dedicated to the survey conducted in the public secondary schools of Thessaloniki, investigating the degree of utilization of social networks in the foreign language lesson. This chapter includes the survey results and the main conclusions reached. Finally, suggestions for further research and analysis are provided in the conclusion.
Two energy scales in the spin excitations of the high-T_c superconductor La$_{2-x}$Sr$_{x}$CuO$_{4}$
Creators: name: Vignolle, B.
name: Hayden, S. M.
name: McMorrow, D. F.
name: Ronnow, H. M.
name: Lake, B.
name: Frost, C. D.
name: Perring, T. G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The excitations responsible for producing high-temperature superconductivity in the cuprates have not been identified. Two promising candidates are collective spin excitations and phonons. A recent argument against spin excitations has been their inability to explain structures seen in electronic spectroscopies such as photoemission and tunnelling. Here we use inelastic neutron scattering to demonstrate that collective spin excitations in optimally doped La$_{2-x}$Sr$_{x}$CuO$_{4}$ are more structured than previously thought. The excitations have a two component structure with a low-frequency component strongest around 18 meV and a broader component strongest near 40-70 meV. The second component carries most of the spectral weight and its energy matches structure seen in photoemission and tunnelling spectra in the range 50-90 meV. Our results demonstrate that collective spin excitations can explain features of quasiparticle spectroscopies and are therefore likely to be the strongest coupled excitations.
description: accepted for publication in Nature Physics, original submission
Κοινωνικές δεξιότητες και κοινωνική αλληλεπίδραση των παιδιών με ειδικές μαθησιακές δυσκολίες: η οπτική των εφήβων
Creators: name: Δεληγκάρη, Ολυμπία Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Ειδικές μαθησιακές δυσκολίες
Κοινωνικές δεξιότητες
Κοινωνική αλληλεπίδραση
Specific Learning Difficulties
Social skills
Social interaction

description: Στο θεωρητικό μέρος της παρούσας εργασίας επιχειρήθηκε η αποσαφήνιση της έννοιας των ειδικών μαθησιακών δυσκολιών και προσεγγίστηκαν ζητήματα της ένταξης και της κοινωνικής ένταξης των μαθητών με μαθησιακές δυσκολίες. Στη συνέχεια, θίχτηκαν ζητήματα ορισμού και ταξινόμησης των κοινωνικών δεξιοτήτων, της σχέσης των τελευταίων με την κοινωνική αλληλεπίδραση, καθώς και τα ελλείμματα που παρουσιάζουν οι μαθητές με μαθησιακές δυσκολίες στις κοινωνικές δεξιότητες. Τέλος, περιγράφηκαν βασικές τεχνικές και μέθοδοι εκπαίδευσης στις κοινωνικές δεξιότητες βάσει ερευνητικών δεδομένων σχετικά με την αποτελεσματικότητα διαφόρων προγραμμάτων ενίσχυσης των δεξιοτήτων. Βασικός σκοπός της παρούσας εργασίας ήταν η διερεύνηση των απόψεων των ίδιων των εφήβων με ειδικές μαθησιακές δυσκολίες σχετικά με τις κοινωνικές τους δεξιότητες και την επίδραση των τελευταίων στην κοινωνική αλληλεπίδρασή τους με τους συνομηλίκους τους και τους ενηλίκους. Στην έρευνα συμμετείχαν δέκα έφηβοι με διαγνωσμένες ειδικές μαθησιακές δυσκολίες. Τα ευρήματα κατέδειξαν πως οι έφηβοι με ειδικές μαθησιακές δυσκολίες που συμμετείχαν στην έρευνα παρουσίαζαν αδυναμίες σε διάφορους τομείς των κοινωνικών δεξιοτήτων, όπως στις διαπροσωπικές σχέσεις και τη σχέση με τον εαυτό, κάτι που φάνηκε πως επιδρούσε στην κοινωνική τους αλληλεπίδραση με συνομηλίκους και ενηλίκους.
description: In the theoretical framework of the present study an attempt was made to clarify the concept of specific learning difficulties and integration and social integration. In addition, issues of definition and classification of social skills were raised, the relation of the latter with social interaction as well as social skills deficits presented in students with learning disabilities. Finally, the effectiveness of social skills training programs is discussed based on research data. The basic aim of the present thesis was the examination of social skills and their effect on social interaction between children with specific learning disabilities and their peers and adults, based on adolescents’ personal experiences. The participants of the present study were ten adolescents with diagnosed specific learning difficulties. The results suggested that the adolescents with learning difficulties who participated in the research exhibited difficulties in several aspects of social skills, and specifically so in interpersonal and self-related behaviors, affecting their social interaction with peers and adults.
On the role of meson loops in the $f_0(1710)$ decay into $Vγ$
Creators: name: Nagahiro, H.
name: Roca, L.
name: Oset, E.
name: Zou, B. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the relevance of the meson loops in the $f_0(1710)$ scalar meson decay into one photon and one vector meson, ($ρ$, $ω$ and $ϕ$). In particular we estimate the size of the loops coming from the decay of the $f_0(1710)$ into two pseudoscalar mesons, containing three pseudoscalar mesons in the loop or two pseudoscalar and one vector meson. The results, despite having large uncertainties, manifest that the contribution of the meson loops to these radiative decays is quite relevant and should be taken into account by the theoretical calculations which use this observables as a test of the possible glueball nature of this resonance.
description: 6 pages, 1 figure
On the Anomalous Scaling Exponents in Nonlinear Models of Turbulence
Creators: name: Angheluta, Luiza
name: Benzi, Roberto
name: Biferale, Luca
name: Procaccia, Itamar
name: Toschi, Federico
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We propose a new approach to the old-standing problem of the anomaly of the scaling exponents of nonlinear models of turbulence. We achieve this by constructing, for any given nonlinear model, a linear model of passive advection of an auxiliary field whose anomalous scaling exponents are the same as the scaling exponents of the nonlinear problem. The statistics of the auxiliary linear model are dominated by `Statistically Preserved Structures' which are associated with exact conservation laws. The latter can be used for example to determine the value of the anomalous scaling exponent of the second order structure function. The approach is equally applicable to shell models and to the Navier-Stokes equations.
description: revised version with new data on Navier-Stokes eqs
Unstable cracks trigger asymptotic rupture modes in bimaterial friction
Creators: name: Shlomai, H.
name: Kammer, D. S.
name: Adda-Bedia, M.
name: Arias, R.
name: Fineberg, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The rupture of the interface joining two materials under frictional contact controls their macroscopic sliding. Interface rupture dynamics depend markedly on the mechanical properties of the bulk materials that bound the frictional interface. When the materials are similar, recent experimental and theoretical work has shown that shear cracks described by Linear Elastic Fracture Mechanics (LEFM) quantitatively describe the rupture of frictional interfaces. When the elastic properties of the two materials are dissimilar, many new effects take place that result from bimaterial coupling: the normal stress at the interface is elastodynamically coupled to local slip rates. At low rupture velocities, bimaterial coupling is not very significant and interface rupture is governed by `bimaterial cracks' that are described well by LEFM. As rupture velocities increase, we experimentally and theoretically show how bimaterial cracks become unstable at a subsonic critical rupture velocity, $c_T$. When the rupture direction opposes the direction of applied shear in the softer material, we show that $c_T$ is the subsonic limiting velocity. When ruptures propagate in the direction of applied shear in the softer material, we demonstrate that $c_T$ provides an explanation for how and when slip pulses (new rupture modes characterized by spatially localized slip) are generated. This work completes the fundamental physical description of how the frictional rupture of bimaterial interfaces takes place.
A Broadband Study of Galactic Dust Emission
Creators: name: Paladini, R.
name: Montier, L.
name: Giard, M.
name: Bernard, J. -P.
name: Dame, T.
name: Ito, S.
name: Macias-Perez, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have combined infrared data with HI, H2 and HII surveys in order to spatially decompose the observed dust emission into components associated with different phases of the gas. An inversion technique is applied. For the decomposition, we use the IRAS 60 and 100 micron bands, the DIRBE 140 and 240 micron bands, as well as Archeops 850 and 2096 micron wavelengths. In addition, we apply the decomposition to all five WMAP bands. We obtain longitude and latitude profiles for each wavelength and for each gas component in carefully selected Galactic radius bins.We also derive emissivity coefficients for dust in atomic, molecular and ionized gas in each of the bins.The HI emissivity appears to decrease with increasing Galactic radius indicating that dust associated with atomic gas is heated by the ambient interstellar radiation field (ISRF). By contrast, we find evidence that dust mixed with molecular clouds is significantly heated by O/B stars still embedded in their progenitor clouds. By assuming a modified black-body with emissivity law lambda^(-1.5), we also derive the radial distribution of temperature for each phase of the gas. All of the WMAP bands except W appear to be dominated by emission from something other than normal dust, most likely a mixture of thermal bremstrahlung from diffuse ionized gas, synchrotron emission and spinning dust. Furthermore, we find indications of an emissivity excess at long wavelengths (lambda > 850 micron) in the outer Galaxy (R > 8.9 kpc). This suggests either the existence of a very cold dust component in the outer Galaxy or a temperature dependence of the spectral emissivity index. Finally, it is shown that ~ 80% of the total FIR luminosity is produced by dust associated with atomic hydrogen, in agreement with earlier findings by Sodroski et al. (1997).
description: accepted for publication by A&A
Dissipation Scaling and Structural Order in Turbulent Channel Flows
Creators: name: Lee, T. -W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Scaling and structural evolutions are contemplated in a new perspective for turbulent channel flows. The total integrated turbulence kinetic energy remains constant when normalized by the friction velocity squared, while the total dissipation increases linearly with respect to the Reynolds number. This serves as a global constraint on the turbulence structure. Motivated by the flux balances in the root turbulence variables, we also discover dissipative scaling for u2 and v2, respectively through its first and second gradients. This self-similarity allows for profile reconstructions at any Reynolds numbers based on a common template, through a simple multiplicative operation. Using these scaled variables in the Lagrangian transport equation derives the Reynolds shear stress, which in turn computes the mean velocity profile. The self-similarities along with the transport equations render possible succinct views of the turbulence dynamics and computability of the full structure in channel flows.
One-step replica symmetry breaking solution for fermionic Ising spin glass in a transverse field
Creators: name: Zimmer, F. M.
name: Magalhaes, S. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The fermionic Ising spin glass models in a transverse field are investigated in a Grassmann path integral formalism. The Parisi's scheme of one-step replica symmetry breaking (RSB) is used within the static ansatz. This formalism has already been applied in a theory in which $m$ (Parisi's block-size parameter) is taken as a constant (PRB 72, 014447 (2005)). Now, it is extended to consider $m$ as a variational parameter. In this case, the results show that RSB is present when $T\to0$, in which the system is driven by quantum fluctuations.
description: 8 pages, 3 figures, accepted for publication as a Brief Report in Phys. Rev. B
Ζωγράφοι στην παράδοση του Σουρεαλισμού μετά το 1970 στην Ελλάδα και τα Βαλκάνια
Creators: name: Βενετάκη, Δήμητρα Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Σουρεαλισμός-Ελλάδα-Βαλκάνια
Surrealism-Greece-Balkans

description: Στην παρούσα μεταπτυχιακή διπλωματική εργασία εξετάζονται εικαστικοί επίγονοι του σουρεαλισμού από την Ελλάδα και τις χώρες των Βαλκανίων. Ο σουρεαλισμός από πολύ νωρίς γνώρισε πολλές προεκτάσεις, γονιμοποιώντας με τις ιδέες του το έργο καλλιτεχνών σε ολόκληρο τον κόσμο. Η παρούσα εργασία εξετάζει, με άξονα τις αρχές του κινήματος, τον βαθμό συγγένειας και το είδος των επιδράσεων που δέχτηκαν οι εικαστικοί επίγονοι, διαχωρίζοντας παράλληλα την έκφραση του σουρεαλισμού από άλλες εκφάνσεις που γνώρισε, όπως ο Μαγικός Ρεαλισμός. Τα έργα των υπό εξέταση καλλιτεχνών αναλύθηκαν υπό το πρίσμα του χώρου, του χρόνου, των αντικειμένων, της τερατολογίας, της αμφισημίας και των ανορθόδοξων κλιμάκων, χαρακτηριστικών μέσα από τα οποία διαπιστώθηκε ότι υλοποιείται το σουρεαλιστικό ιδίωμα. Η εργασία διαρθρώνεται σε δύο μέρη. Στο πρώτο μέρος αρχικά εξετάζονται τα χαρακτηριστικά του σουρεαλισμού στην Ελλάδα και έπειτα αναλύονται δημιουργίες των Ελλήνων καλλιτεχνών που επιλέχθηκαν. Αντιστοίχως, στο δεύτερο μέρος εξετάζονται δημιουργίες βαλκάνιων καλλιτεχνών, προηγείται όμως μια σύντομη αναφορά στην τέχνη των Βαλκανίων και της Ανατολικής Ευρώπης. Η αναφορά αυτή κρίθηκε απαραίτητη για την κατανόηση των συνθηκών μέσα στις οποίες αναπτύχθηκε η τέχνη της περιοχής. Η εργασία κλείνει με τα συμπεράσματα, όπου επιχειρούνται συγκρίσεις και μια γενικότερη αποτίμηση των καλλιτεχνών και του έργου τους.
description: This master thesis examines the visual descendants of surrealism originated from Greece and the Balkans. Surrealism from the very beginning met many extensions, fertilizing with its ideas the artists' creations worldwide. The present study, considering the principles of the surrealist movement, examines the affinity and the kind of influences the descendants received from surrealism. At the same time an attempt was made to separate the expression of surrealism from other facets that it met, like Magic Realism. The works of the under review artists were analyzed in the light of space, time, objects, teratology, ambiguity and unorthodox scales. The above characteristics were the criteria through which the surrealist idiom implemented. The study is divided in two parts. At the beginning of the first part the characteristics and the form that surrealism took in Greece are examined. Thereafter the selected creations of the Greek artists are analyzed. Respectively, in the second part, creations of Balkan's artists are examined, after a brief reference to the Balkans and Eastern Europe's art. The petition was considered essential for understanding the conditions under which the art of the region developed. The study ends up with the conclusions, where comparisons are attempted along with a general assessment of the artists and their work.
A Quantum Approach to Classical Statistical Mechanics
Creators: name: Somma, Rolando D.
name: Batista, Cristian D.
name: Ortiz, Gerardo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Quantitative Biology (q-bio.OT)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We present a new approach to study the thermodynamic properties of $d$-dimensional classical systems by reducing the problem to the computation of ground state properties of a $d$-dimensional quantum model. This classical-to-quantum mapping allows us to deal with standard optimization methods, such as simulated and quantum annealing, on an equal basis. Consequently, we extend the quantum annealing method to simulate classical systems at finite temperatures. Using the adiabatic theorem of quantum mechanics, we derive the rates to assure convergence to the optimal thermodynamic state. For simulated and quantum annealing, we obtain the asymptotic rates of $T(t) \approx (p N) /(k_B \log t)$ and $γ(t) \approx (Nt)^{-\bar{c}/N}$, for the temperature and magnetic field, respectively. Other annealing strategies, as well as their potential speed-up, are also discussed.
description: 4 pages, no figures
Η συρροή καταδικαστικών αποφάσεων κατ’ άρθρο 551 ΚΠΔ
Creators: name: Ευαγγέλου, Καλλιόπη Ζαφειρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Συνολική ποινή
Εκτέλεση αποφάσεων
Global Sentence
Decisions execution

description: Με την μελέτη επιχειρείται η ερμηνευτική προσέγγιση του άρθρου 551 ΚΠΔ. Ειδικότερα αντιμετωπίζονται , με προσφυγή σε αντίστοιχες νομολογιακές και επιστημονικές παραδοχές, ζητήματα που αφορούν : τα είδη συρροής ,-τη φύση και τον σκοπό της διαδικασίας του άρθρου 551 ΚΠΔ –το αρμόδιο δικαστήριο-την αίτηση του καταδίκου –το αμετάκλητο ή όχι των αποφάσεων-την εκπροσώπηση από συνήγορο και την δυνατότητα υποβολής υπομνήματος-την προσαγωγή του κατηγορουμένου, την κλήτευση και την ακρόασή του-τη χειροτέρευση της θέσεως –την αιτιολογία, τον αναιρετικό έλεγχο και την αναστολή εκτέλεσης της απόφασης
description: Τhe author tries to approach s. 551 C.Cr.Pr. Particularly she deals with subjects such as: kinds of concourse-the nature and the aim of the s. 551C.Cr.Pr. procedure-the competent Court-the convict request-the irrevocability of the decision-the presentation and hearing of the convict-the representation of the convict-the deterioration of his position-the justification, control by the Supreme Court and the suspension of the execution of the decision
title: Enabling leaders and members within consecrated life communities
Creators: name: https://orcid.org/0000-0003-0646-0975
name: https://orcid.org/0009-0004-5872-8798
Publisher: name: https://ror.org/02stey378
publisherIdentifier: https://ror.org/02stey378
publisherIdentifierScheme: ROR
Year: 2024

description: Consecrated life is a divine gift from God to the Church through the Holy Spirit, rooted deeply in the example and teachings of Christ (Pope Paul, 1996). Consecrated life communities, as described by Kanu (2019) and Noronha (2019), are unique societal structures where individuals, guided by the Holy Spirit, commit to poverty, chastity, and obedience, dedicating themselves to God and symbolising the life to come. This research aims to enhance understanding of leader-member relationships within these communities, thereby contributing to their overall well-being, and sustainability. The study aims to illuminate specific leadership approaches, leadership development, and subjective well-being and community environment within these unique settings. To achieve this, the study will employ a small-scale autoethnography, drawing on my personal experiences as a community member. Additionally, a combination of qualitative research methods, including semi-structured interviews and focus groups, will be applied to captivate diverse perspectives from leaders and members. The anticipated outcomes of this research include a comprehensive understanding of leader-member dynamics within consecrated life communities and practical insights to bridge generational and relational gaps. The findings could potentially inform leadership practices and contribute to the well-being of these communities, thereby having a significant societal impact.
Overview of hadronic interaction studies at the Pierre Auger Observatory
Creators: name: Vícha, Jakub
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The combination of fluorescence and surface detectors at the Pierre Auger Observatory offers unprecedented precision in testing models of hadronic interactions at center-of-mass energies around 70 TeV and beyond. However, for some time, discrepancies between model predictions and measured air-shower data have complicated efforts to accurately determine the mass composition of ultra-high-energy cosmic rays. A key inconsistency is the deficit of simulated signals compared to those measured with the surface detectors, typically interpreted as a deficit in the muon signal generated by the hadronic component of simulated showers.
 Recently, a new global method has been applied to the combined data from the surface and fluorescence detectors at the Pierre Auger Observatory. This method simultaneously determines the mass composition of cosmic rays and evaluates variations in the simulated depth of the shower maximum and hadronic signals on the ground. The findings reveal not only the alleviated muon problem but also show that all current models of hadronic interactions predict depths of the shower maximum that are too shallow, offering new insights into deficiencies in these models from a broader perspective.
description: Proceedings of the 7th International Symposium on Ultra High Energy Cosmic Rays (UHECR2024)
Testing Disk Identification Methods Through Numerical Simulations of Protostellar Evolution
Creators: name: Aso, Yusuke
name: Machida, Masahiro N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We test whether the radii of circumstellar disks can be reliably determined in observations applying the results of a numerical simulation. Firstly, we execute a core collapse simulation which starts from a rotating magnetized spherical core, and continue the calculation until the protostellar mass reaches 0.5 Msun. Then, for each set of simulation data, we calculate the radiative transfer to generate the data cube for the synthetic observation. The spatial and velocity resolutions of the synthetic observation are 0.15 arcsec (20 au) and 0.1 km/s, respectively. We define seven different disk radii. Four radii are estimated from the synthetic observation, using the continuum image, continuum visibility, C18O channel map, and C18O position velocity (PV) diagram. The other three radii are taken from the simulation and use the disk rotation, infall motion, and density contrast around the protostar to identify the disk. Finally, we compare the disk radii estimated from the systemic observation with those from the simulation. We find that the disk radius defined using the PV diagram can reliably trace the Keplerian disk when the protostellar mass is larger than M_*>~ 0.2 Msun independent of the inclination angle to the line of sight. In addition, the PV diagram provides an accurate estimate of the central stellar mass through the whole protostellar evolution. The simulation also indicates that the circumstellar disk is massive enough to be gravitationally unstable through the evolution. Such an unstable disk can show either a circular or spiral morphology on a similar timescale.
description: 39 pages, 18 figures, accepted for publication in The Astrophysical Journal
Localization of Inner-Shell Photoelectron Emission and Interatomic Coulombic Decay in Ne$_2$
Creators: name: Kreidi, K.
name: Jahnke, T.
name: Weber, Th.
name: Havermeier, T.
name: Grisenti, R. E.
name: Liu, X.
name: Morisita, Y.
name: Schössler, S.
name: Schmidt, L. Ph. H.
name: Schöffler, M.
name: Odenweller, M.
name: Neumann, N.
name: Foucar, L.
name: Titze, J.
name: Ulrich, B.
name: Sturm, F.
name: Stuck, C.
name: Wallauer, R.
name: Voss, S.
name: Lauter, I.
name: Kim, H. K.
name: Rudloff, M.
name: Fukuzawa, H.
name: Prümper, G.
name: Saito, N.
name: Ueda, K.
name: Czasch, A.
name: Jagutzki, O.
name: Schmidt-Böcking, H.
name: Semenov, S. K.
name: Cherepkov, N. A.
name: Dörner, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: We used Cold Target Recoil Ion Momentum Spectroscopy (COLTRIMS) to investigate the decay of Ne$_2$ after K-shell photoionization. The breakup into Ne$^{1+}$ / Ne$^{2+}$ shows interatomic Coulombic decay (ICD) occurring after a preceding atomic Auger decay. The molecular frame angular distributions of the photoelectron and the ICD electron show distinct, asymmetric features, which imply localization of the K-vacancy created at one of the two atomic sites of the Ne$_2$ and an emission of the ICD electron from a localized site. The experimental results are supported by calculations in frozen core Hartree-Fock approach.
description: 4 pages, 4 figures
Housing Skidegate community: an alternative approach at solving the housing needs of Skidegate Indian Band
Creators: name: LLanos, Ana Maria
Publisher: name: University of British Columbia
Year: 2009

description: Due to the pressure of increasing population growth in Skidegate, BC, large areas of land adjacent to the Skidegate Reserve have been purchased by the Skidegate Band to satisfy the community's housing needs. These areas, having been developed following a typical suburban subdivision approach, have considerably increased infrastructure costs and have spread development out to inaccessible areas isolated from the existing community. This project proposes an alternative to this type of development, it reduces the environmental impact of the development as well as its cost, and it attempts to re-introduce the concept of community and its cultural heritage. My interpretation of Haida cosmology operates at two scales in the project. On the site planning level, the development finds its precedent in the linear development of traditional Haida villages. In terms of the housing, the three axes that define the paths of supernatural power : central vertical axis (hearth), longitudinal axis (connection between the forest, the house and the water) and the transverse axis (link between the houses along the line) have served as vehicles for introducing elements of Haida traditional culture. The development occupies one-third of an area currently clear-cut, the remaining two-thirds would be re-forested. Clusters of houses are placed on either side of a central gravel road maintaining the road on one level. Within every cluster there are three zones: a parking/workshop area adjacent to the road; a common area shared by the houses of every cluster; houses arranged along an axis. Each house is given the same view opportunities, level of privacy and access privileges. Each cluster contains different housing units based on a prototype. The prototype has a central continuous post and beam structure that contains common areas, and two enclosed side bays for more private functions. The spatial continuity within the post and beam structure establishes the connection between the water, the house and the forest. This prototype responds to the diversity of family types within this community, and the technology allows for user involvement in the construction process.
Learning to Infer User Hidden States for Online Sequential Advertising
Creators: name: Peng, Zhaoqing
name: Jin, Junqi
name: Luo, Lan
name: Yang, Yaodong
name: Luo, Rui
name: Wang, Jun
name: Zhang, Weinan
name: Xu, Haiyang
name: Xu, Miao
name: Yu, Chuan
name: Luo, Tiejian
name: Li, Han
name: Xu, Jian
name: Gai, Kun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: To drive purchase in online advertising, it is of the advertiser's great interest to optimize the sequential advertising strategy whose performance and interpretability are both important. The lack of interpretability in existing deep reinforcement learning methods makes it not easy to understand, diagnose and further optimize the strategy. In this paper, we propose our Deep Intents Sequential Advertising (DISA) method to address these issues. The key part of interpretability is to understand a consumer's purchase intent which is, however, unobservable (called hidden states). In this paper, we model this intention as a latent variable and formulate the problem as a Partially Observable Markov Decision Process (POMDP) where the underlying intents are inferred based on the observable behaviors. Large-scale industrial offline and online experiments demonstrate our method's superior performance over several baselines. The inferred hidden states are analyzed, and the results prove the rationality of our inference.
description: to be published in CIKM 2020
Microwaves in Quantum Computing
Creators: name: Bardin, Joseph C.
name: Slichter, Daniel H.
name: Reilly, David J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Quantum information processing systems rely on a broad range of microwave technologies and have spurred development of microwave devices and methods in new operating regimes. Here we review the use of microwave signals and systems in quantum computing, with specific reference to three leading quantum computing platforms: trapped atomic ion qubits, spin qubits in semiconductors, and superconducting qubits. We highlight some key results and progress in quantum computing achieved through the use of microwave systems, and discuss how quantum computing applications have pushed the frontiers of microwave technology in some areas. We also describe open microwave engineering challenges for the construction of large-scale, fault-tolerant quantum computers.
description: Invited review article, to appear in IEEE Journal of Microwaves. 29 pages, 13 figures, $10^{6}$ to $10^{11}$ Hz
Personal Privacy Protection via Irrelevant Faces Tracking and Pixelation in Video Live Streaming
Creators: name: Zhou, Jizhe
name: Pun, Chi-Man
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: To date, the privacy-protection intended pixelation tasks are still labor-intensive and yet to be studied. With the prevailing of video live streaming, establishing an online face pixelation mechanism during streaming is an urgency. In this paper, we develop a new method called Face Pixelation in Video Live Streaming (FPVLS) to generate automatic personal privacy filtering during unconstrained streaming activities. Simply applying multi-face trackers will encounter problems in target drifting, computing efficiency, and over-pixelation. Therefore, for fast and accurate pixelation of irrelevant people's faces, FPVLS is organized in a frame-to-video structure of two core stages. On individual frames, FPVLS utilizes image-based face detection and embedding networks to yield face vectors. In the raw trajectories generation stage, the proposed Positioned Incremental Affinity Propagation (PIAP) clustering algorithm leverages face vectors and positioned information to quickly associate the same person's faces across frames. Such frame-wise accumulated raw trajectories are likely to be intermittent and unreliable on video level. Hence, we further introduce the trajectory refinement stage that merges a proposal network with the two-sample test based on the Empirical Likelihood Ratio (ELR) statistic to refine the raw trajectories. A Gaussian filter is laid on the refined trajectories for final pixelation. On the video live streaming dataset we collected, FPVLS obtains satisfying accuracy, real-time efficiency, and contains the over-pixelation problems.
Photoluminescence Lineshapes for Color Centers in Silicon Carbide from Density Functional Theory Calculations
Creators: name: Hashemi, Arsalan
name: Linderalv, Christopher
name: Krasheninnikov, Arkady V.
name: Ala-Nissila, Tapio
name: Erhart, Paul
name: Komsa, Hannu-Pekka
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Silicon carbide with optically and magnetically active point defects offers unique opportunities for quantum technology applications. Since interaction with these defects commonly happens through optical excitation and de-excitation, a complete understanding of their light-matter interaction in general and optical signatures, in particular, is crucial. Here, we employ quantum mechanical density functional theory calculations to investigate the photoluminescence lineshapes of selected, experimentally observed color centers (including single vacancies, double vacancies, and vacancy impurity pairs) in 4H-SiC. The analysis of zero-phonon lines as well as Huang-Rhys and Debye-Waller factors are accompanied by a detailed study of the underlying lattice vibrations. We show that the defect lineshapes are governed by strong coupling to bulk phonons at lower energies and localized vibrational modes at higher energies. Generally, good agreement to the available experimental data is obtained, and thus we expect our theoretical work to be beneficial for the identification of defect signatures in the photoluminescence spectra and thereby advance the research in quantum photonics and quantum information processing.
description: 8 pages