cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Wood physical property measurements using microwaves
Creators: name: Shen, Jianping
Publisher: name: University of British Columbia
Year: 2009

description: The work described in this thesis is the first part of a project aimed at developing an advanced lumber strength grading system using microwave measurements. The overall objective is to develop an improved practical system for estimating lumber strength. A microwave instrumentation system is described in this thesis that can measure wood grain angle, specific gravity, and moisture content. These three physical properties directly influence lumber strength. In the development of the current microwave instrumentation system, an advanced microwave sensor system was designed to measure elliptically polarized microwave fields. A simplified microwave theory is presented to describe the relationship between the measurements from the sensor and wood grain angle, specific gravity, and moisture content. The simplified theory is very successful in explaining the experimental observations, and provides valuable guidance in the determination of grain angle, specific gravity, and moisture content using the microwave measurements from the new sensor system. Starting from the simplified microwave theory, a simple but efficient model is developed for determining the grain angle using the microwave measurements from the newly developed microwave sensor. For data collected from one hundred samples of Douglas-fir and spruce, the model gave a coefficient of determination r² = 95%, and a standard error of 1.8 degrees for grain angles up to 30 degrees. Simple yet efficient models for evaluating specific gravity and moisture content are also developed. For specific gravity, the proposed evaluation model gives a coefficient of determination r² = 88%, and a standard error of 0.026. For moisture content, the proposed evaluation model gives a coefficient of determination of 85% and a standard error of 0.7% in MC. Detailed study shows that the current microwave instrumentation system and the developed evaluation models are equally effective for measurement environments such as sawmills where temperature changes seasonally over a substantial range. The current microwave instrumentation system developed during this thesis research can provide accurate grain angle, specific gravity, and moisture content in realtime regardless of environmental temperature, wood species, and wood structural characteristics such as annual ring direction, diving grain, and small thickness variation. Accurate knowledge of grain angle, specific gravity, and moisture content will make it possible to calculate lumber strength using mechanistic procedures. This will make lumber strength evaluation more accurate and reliable.
On the relation between p-adic and ordinary strings
Creators: name: Ghoshal, Debashis
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The amplitudes for the tree-level scattering of the open string tachyons, generalised to the field of p-adic numbers, define the p-adic string theory. There is empirical evidence of its relation to the ordinary string theory in the p_to_1 limit. We revisit this limit from a worldsheet perspective and argue that it is naturally thought of as a continuum limit in the sense of the renormalisation group.
description: 13 pages harvmac (b), 2 eps figures; v2: revtex, shortened, published version
Real Roots of Random Polynomials and Zero Crossing Properties of Diffusion Equation
Creators: name: Schehr, Gregory
name: Majumdar, Satya N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study various statistical properties of real roots of three different classes of random polynomials which recently attracted a vivid interest in the context of probability theory and quantum chaos. We first focus on gap probabilities on the real axis, i.e. the probability that these polynomials have no real root in a given interval. For generalized Kac polynomials, indexed by an integer d, of large degree n, one finds that the probability of no real root in the interval [0,1] decays as a power law n^{-θ(d)} where θ(d) > 0 is the persistence exponent of the diffusion equation with random initial conditions in spatial dimension d. For n \gg 1 even, the probability that they have no real root on the full real axis decays like n^{-2(θ(2)+θ(d))}. For Weyl polynomials and Binomial polynomials, this probability decays respectively like \exp{(-2θ_{\infty}} \sqrt{n}) and \exp{(-πθ_{\infty} \sqrt{n})} where θ_{\infty} is such that θ(d) = 2^{-3/2} θ_{\infty} \sqrt{d} in large dimension d. We also show that the probability that such polynomials have exactly k roots on a given interval [a,b] has a scaling form given by \exp{(-N_{ab} \tilde ϕ(k/N_{ab}))} where N_{ab} is the mean number of real roots in [a,b] and \tilde ϕ(x) a universal scaling function. We develop a simple Mean Field (MF) theory reproducing qualitatively these scaling behaviors, and improve systematically this MF approach using the method of persistence with partial survival, which in some cases yields exact results. Finally, we show that the probability density function of the largest absolute value of the real roots has a universal algebraic tail with exponent {-2}. These analytical results are confirmed by detailed numerical computations.
description: 32 pages, 16 figures
Crossed Andreev reflection in topological insulator nanowire T-junctions
Creators: name: Fuchs, Jacob
name: Barth, Michael
name: Gorini, Cosimo
name: Adagideli, İnanç
name: Richter, Klaus
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We numerically study crossed Andreev reflection (CAR) in a topological insulator nanowire T-junction where one lead is proximitized by a superconductor. We perform realistic simulations based on the 3D BHZ model and compare the results with those from an effective 2D surface model, whose computational cost is much lower. Both approaches show that CAR should be clearly observable in a wide parameter range, including perfect CAR in a somewhat more restricted range. Furthermore, it can be controlled by a magnetic field and is robust to disorder. Our effective 2D implementation allows to model systems of micronsize, typical of experimental setups, but computationally too heavy for 3D models.
description: 10 pages, 8 figures
Large-Mass Ultra-Low Noise Germanium Detectors: Performance and Applications in Neutrino and Astroparticle Physics
Creators: name: Barbeau, P. S.
name: Collar, J. I.
name: Tench, O.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A new type of radiation detector, a p-type modified electrode germanium diode, is presented. The prototype displays, for the first time, a combination of features (mass, energy threshold and background expectation) required for a measurement of coherent neutrino-nucleus scattering in a nuclear reactor experiment. The device hybridizes the mass and energy resolution of a conventional HPGe coaxial gamma spectrometer with the low electronic noise and threshold of a small x-ray semiconductor detector, also displaying an intrinsic ability to distinguish multiple from single-site particle interactions. The present performance of the prototype and possible further improvements are discussed, as well as other applications for this new type of device in neutrino and astroparticle physics (double-beta decay, neutrino magnetic moment and WIMP searches).
description: submitted to Phys. Rev. C
X-ray emission from PSR B1800-21, its wind nebula, and similar systems
Creators: name: Kargaltsev, O.
name: Pavlov, G. G.
name: Garmire, G. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We detected X-ray emission from PSR B1800-21 and its synchrotron nebula with the Chandra X-ray Observatory. The pulsar's observed flux is (1.4+/-0.2) 10^{-14} ergs cm^{-2} s^{-1} in the 1-6 keV band. The spectrum can be described by a two-component PL+BB model, suggesting a mixture of thermal and magnetospheric emission. For a plausible hydrogen column density n_{H}=1.4 10^{22} cm^{-2}, the PL component has a slope Gamma=1.4+/-0.6 and a luminosity L_{psr}^{nonth}=4 10^{31}(d/4 kpc)^2 ergs s^{-1}. The properties of the thermal component (kT=0.1-0.3 keV, L^{bol}=10^{31}-10^{33} ergs s^{-1}) are very poorly constrained because of the strong interstellar absorption. The compact, 7''\times4'', inner pulsar-wind nebula (PWN), elongated perpendicular to the pulsar's proper motion, is immersed in a fainter asymmetric emission. The observed flux of the PWN is (5.5+/-0.6) 10^{-14} ergs cm^{-2} s^{-1} in the 1-8 keV band. The PWN spectrum fits by a PL model with Gamma=1.6+/-0.3, L=1.6 10^{32} (d/4 kpc})^2 ergs s^{-1}. The shape of the inner PWN suggests that the pulsar moves subsonically and X-ray emission emerges from a torus associated with the termination shock in the equatorial pulsar wind. The inferred PWN-pulsar properties (e.g., the PWN X-ray efficiency, L_{pwn}/\dot{E}~10^{-4}; the luminosity ratio, L_{pwn}/L_{psr}^{nonth}=4; the pulsar wind pressure at the termination shock, p_s=10^{-9} ergs cm^{-3}) are very similar to those of other subsonically moving Vela-like objects detected with Chandra (L_{pwn}/\dot{E}=10^{-4.5}-10^{-3.5}, L_{pwn}/L_{psr}^{nonth}~5, p_s=10^{-10}-10^{-8} ergs cm^{-1}).
description: 11 pages, 10 figures, 2 tables; submitted to ApJ. Version with the high-resolution figures is available at http://www.astro.psu.edu/users/green/B1800/B1800_ApJ.pdf
Symmetry based determination of space-time functions in nonequilibrium growth processes
Creators: name: Roethlein, Andreas
name: Baumann, Florian
name: Pleimling, Michel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the space-time correlation and response functions in nonequilibrium growth processes described by linear stochastic Langevin equations. Exploiting exclusively the existence of space and time dependent symmetries of the noiseless part of these equations, we derive expressions for the universal scaling functions of two-time quantities which are found to agree with the exact expressions obtained from the stochastic equations of motion. The usefulness of the space-time functions is illustrated through the investigation of two atomistic growth models, the Family model and the restricted Family model, which are shown to belong to a unique universality class in 1+1 and in 2+1 space dimensions. This corrects earlier studies which claimed that in 2+1 dimensions the two models belong to different universality classes.
description: 18 pages, three figures included, submitted to Phys. Rev. E
On Singleton Composites in Non-compact WZW Models
Creators: name: Engquist, J.
name: Sundell, P.
name: Tamassia, L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine the so(2,D-1) WZW model at the subcritical level -(D-3)/2. It has a singular vacuum vector at Virasoro level 2. Its decoupling constitutes an affine extension of the equation of motion of the (D+1)-dimensional conformal particle, i.e. the scalar singleton. The admissible (spectrally flowed) representations contain the singleton and its direct products, consisting of massless and massive particles in AdS_D. In D=4 there exists an extended model containing both scalar and spinor singletons of sp(4). Its realization in terms of 4 symplectic-real bosons contains the spinor-oscillator constructions of the 4D singletons and their composites. We also comment on the prospects of relating gauged versions of the models to the phase-space quantization of partonic branes and higher-spin gauge theory.
description: 41 pages; v2: a figure and one reference added
Stochastic thermostats: comparison of local and global schemes
Creators: name: Bussi, Giovanni
name: Parrinello, Michele
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show that a recently introduced stochastic thermostat [J. Chem. Phys. 126 (2007) 014101] can be considered as a global version of the Langevin thermostat. We compare the global scheme and the local one (Langevin) from a formal point of view and through practical calculations on a model Lennard-Jones liquid. At variance with the local scheme, the global thermostat preserves the dynamical properties for a wide range of coupling parameters, and allows for a faster sampling of the phase-space.
description: To appear on Computer Physics Communications
Μουσειολογικός προγραμματισμός και σχεδιασμός του λαογραφικού μουσείου στο Λιβάδι Ελασσόνας
Creators: name: Ζαϊρές, Βασίλειος Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Ολύμπιοι Βλάχοι
Λιβάδι
Λαογραφικό Μουσείο
Olympus Vlachs
Livadi
Folklore Museum

description: Σκοπός της διπλωματικής αυτής είναι η παρουσίαση πρότασης για τη δημιουργία Λαογραφικού Μουσείου στο Λιβάδι Ολύμπου Ελασσόνας. Αρχικά, θέσαμε τις βασικότερες έννοιες, ώστε να κατανοήσουμε τους όρους Βλάχοι, Ολύμπιοι Βλάχοι, Λιβάδι, κ.ά. Αναφερθήκαμε στην ιστορία του τόπου και των ανθρώπων και, στη συνέχεια, παρουσιάσαμε αφενός τον μουσειολογικό μας προγραμματισμό και αφετέρου τον λεπτομερή σχεδιασμό για την ανάδειξη του λαογραφικού πλούτου που διαθέτει το χωριό. Πρόκειται για πρόταση του συγγραφέα για τη δημιουργία ενός κατά το δυνατό ολοκληρωμένου και σύγχρονου μουσειακού χώρου, κατάλληλου να στεγάσει αντικείμενα καθημερινής κυρίως χρήσης των Λιβαδιωτών, που εντάσσονται στη συλλογή μας. Τέλος, επιχειρήσαμε και μια πρόταση για τη διαμόρφωση των χώρων του μουσείου, του καφέ και του πωλητηρίου.
description: The aim of this thesis is to propose the planning and the establishment of a Folklife Museum in Livadi, Olympus, area of Elassona. In the first place, we set the basic concept of the museum, so that the terms Vlachs, Olympus Vlachs, Livadi, etc, can be understood. We discussed the local history of both the area and its people, and then we unfolded not only the planning but also the design of the museum, in order to focus on the wealth of Folk artefacts of the region. This is the writer's proposal for a contemporary and complete organisation of the museum building, ready to accommodate and display a collection of locals' objects of everyday use. Finally, we proposed a special planning for certain supplementary spaces of the museum, the cafeteria and the gift shop.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
The chemical evolution of Omega Centauri's progenitor system
Creators: name: Romano, D.
name: Matteucci, F.
name: Tosi, M.
name: Pancino, E.
name: Bellazzini, M.
name: Ferraro, F. R.
name: Limongi, M.
name: Sollima, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Chemical evolution models are presented for the anomalous globular cluster Omega Centauri. After demonstrating that the chemical features of Omega Cen can not be reproduced in the framework of the closed-box self-enrichment scenario, we discuss a model in which this cluster is the remnant of a dwarf spheroidal galaxy evolved in isolation and then swallowed by the Milky Way. Both infall of primordial matter and metal-enriched gas outflows have to be considered in order to reproduce the stellar metallicity distribution function, the age-metallicity relation and several abundance ratios. Yet, as long as an ordinary stellar mass function and standard stellar yields are assumed, we fail by far to get the enormous helium enhancement required to explain the blue main sequence (and, perhaps, the extreme horizontal branch) stellar data. Rotating models of massive stars producing stellar winds with large helium excesses at low metallicities have been put forward as promising candidates to solve the `helium enigma' of Omega Cen (Maeder & Meynet, 2006, A&A, 448, L37). However, we show that for any reasonable choice of the initial mass function the helium-to-metal enrichment of the integrated stellar population is unavoidably much lower than 70 and conclude that the issue of the helium enhancement in Omega Cen still waits for a satisfactory explanation. We briefly speculate upon possible solutions.
description: 11 pages, 9 figures; accepted for publication in MNRAS
Experimental investigation of the design and testing capabilities of the tolerant wind tunnel
Creators: name: Kong, Lingzhe
Publisher: name: University of British Columbia
Year: 2009

description: This thesis deals with a new approach to reduce wall blockage effects in wind tunnel testing. The idea is to use test section walls with airfoil slats at zero incidence to provide a test environment close to the free air condition. The performance of this test sec tion was investigated experimentally for forced plunging oscillation of two-dimensional NACA 0015 airfoils. A potential flow theory was also developed to estimate the wall correction numerically. Though a substantial difference between theory and experiment was observed under all cOnditions, both results show a similar trend: the wall blockage effect increases with increasing C/H ratio, but decreases with increasing non-dimensional frequency μ. However, low-correction experimental data is achieved at an open area ratio about 70%. This research was next extended to wind engineering tests of bluff bodies. The new wind tunnel test section consists of a sequence of uniformly spaced ring airfoils and a solid floor which represents the ground. Current test models include truck-trailer combinations, buses, cars and buildings. Spires and roughness elements are employed to simulate the atmospheric boundary layer flow in the building tests. The effects on wall corrections of several parameters,, such as the tunnel open area ratio, model area blockage ratio, model length blockage ratio, tunnel test section length-width ratio and the natural wind profile were investigated and relations between them were discussed. For the airfoil-slatted test section, results show that even at a model area blockage of 30% and length blockage of 50%, pressure distributions and drag coefficients unaffected by the tunnel walls can be obtained at an optimum combination of these parameters. Moreover, a common model blockage tolerance range is observed for all test models over the middle range of the open area ratio. On the whole, a test section with a length-width ratio of 5.0 at an open area ratio of 48% tends to be the best choice for wind engineering tests in the 3-D tolerant wind tunnel.
title: FANTASTIC NARRATIVES: THE SPECULATIVE UNIVERSE IN ITS VARIOUS NUANCES
title: NARRATIVAS FANTÁSTICAS: O UNIVERSO ESPECULATIVO EM SUAS VARIADAS NUANCES
titleType: AlternativeTitle
title: NARRATIVAS FANTÁSTICAS: EL UNIVERSO ESPECULATIVO EN SUS DISTINTOS MATIZES
titleType: AlternativeTitle
Creators: name: Araújo, Naiara Sales
name: Sousa, Tauan de Almeida
name: Rodrigues Júnior, Edson José
name: Costa, José Antônio Moraes
Publisher: name: Cenas Educacionais
Year: 2024
Subjects: Literatura
Narrativa
Ficção
Literature
Narrative
Fiction
Narrativo
Ficción

description: Presentation of the Thematic Dossier FANTASTIC NARRATIVES: THE SPECULATIVE UNIVERSE IN ITS VARIOUS NUANCES

 
description: Apresentação do Dossiê Temático NARRATIVAS FANTÁSTICAS: O UNIVERSO ESPECULATIVO EM SUAS VARIADAS NUANCES
description: Presentación del Dossier Temático NARRATIVAS FANTÁSTICAS: EL UNIVERSO ESPECULATIVO EN SUS DISTINTOS MATIZES
Enhancing associative memory recall and storage capacity using confocal cavity QED
Creators: name: Marsh, Brendan P.
name: Guo, Yudan
name: Kroeze, Ronen M.
name: Gopalakrishnan, Sarang
name: Ganguli, Surya
name: Keeling, Jonathan
name: Lev, Benjamin L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We introduce a near-term experimental platform for realizing an associative memory. It can simultaneously store many memories by using spinful bosons coupled to a degenerate multimode optical cavity. The associative memory is realized by a confocal cavity QED neural network, with the cavity modes serving as the synapses, connecting a network of superradiant atomic spin ensembles, which serve as the neurons. Memories are encoded in the connectivity matrix between the spins, and can be accessed through the input and output of patterns of light. Each aspect of the scheme is based on recently demonstrated technology using a confocal cavity and Bose-condensed atoms. Our scheme has two conceptually novel elements. First, it introduces a new form of random spin system that interpolates between a ferromagnetic and a spin-glass regime as a physical parameter is tuned---the positions of ensembles within the cavity. Second, and more importantly, the spins relax via deterministic steepest-descent dynamics, rather than Glauber dynamics. We show that this nonequilibrium quantum-optical scheme has significant advantages for associative memory over Glauber dynamics: These dynamics can enhance the network's ability to store and recall memories beyond that of the standard Hopfield model. Surprisingly, the cavity QED dynamics can retrieve memories even when the system is in the spin glass phase. Thus, the experimental platform provides a novel physical instantiation of associative memories and spin glasses as well as provides an unusual form of relaxational dynamics that is conducive to memory recall even in regimes where it was thought to be impossible.
description: 35 pages, 16 figures, 6 appendices
Η σχετική εικονικότητα των δικαιοπραξιών
Creators: name: Χατζηδημητρίου, Γεώργιος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Εικονικότητα
Σχετική
Δικαιοπραξία
Simulation
Relative
Legal transaction

description: Σκοπό της ανά χείρας διπλωματικής εργασίας αποτελεί η μελέτη και έρευνα της σχετικής εικονικότητας των δικαιοπραξιών μέσω της ερμηνείας του άρθρου 138 § 2 ΑΚ. Ειδικότερα, η παρούσα εργασία επικεντρώνεται αφενός στην ανάλυση των όρων και προϋποθέσεων για τον χαρακτηρισμό μιας δικαιοπραξίας ως σχετικά εικονικής, αφετέρου στην παράθεση και παρουσίαση των επιμέρους ειδικότερων μορφών σχετικής εικονικότητας, όπως αυτές συναντώνται στη συναλλακτική πρακτική. Για το λόγο αυτό, σε ό,τι αφορά τη δομή της παρούσης διπλωματικής εργασίας, αυτή αποτελείται ουσιαστικά από δύο (2) κεφάλαια, στα οποία καταρχήν γίνεται εκτενής αναφορά στους όρους εφαρμογής της διάταξης του άρθρου 138 § 2 ΑΚ, με έμφαση στη σπουδαιότερη προϋπόθεση της ύπαρξης εικονικής δικαιοπραξίας και εν συνεχεία εκτίθενται οι κατ’ ιδίαν ειδικότερες περιπτώσεις σχετικής εικονικότητας (ως προς το τίμημα, το πρόσωπο του συμβαλλόμενου και το είδος της συναπτόμενης δικαιοπραξίας), όπως επίσης και τα επιμέρους νομικά ζητήματα που ανακύπτουν στο πλαίσιο καθεμιάς εξ αυτών και έχουν έντονα απασχολήσει την ελληνική θεωρία και νομολογία.
description: The aim of the present thesis is the study and research of the relative simulation of legal transactions through the interpretation of article 138 § 2 of Greek Civil Code. In particular, this paper focuses, on one hand, on the analysis of terms and conditions for a legal transaction to be considered as relatively simulated and on the other hand, on the presentation of the specific forms of relative simulation, as they are found in transactional practice. Therefore, in terms of the structure of the current thesis, it consists basically of two (2) chapters, where at first extensive reference is made to the terms and conditions for the application of article 138 § 2 of the Greek Civil Code, focusing on the major prerequisite of the existence of a simulated transaction and then the specific forms of relative simulation (concerning the price, the identity of the contractual party and the type of the concluded transaction) are presented thoroughly, as well as the legal issues arising under each one of them and have strongly been discussed among the Greek theoretical and the Greek Courts.
Photon Defects in Noncommutative Standard Model Candidates
Creators: name: Abel, S. A.
name: Jaeckel, J.
name: Khoze, V. V.
name: Ringwald, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Restrictions imposed by gauge invariance in noncommutative spaces together with the effects of ultraviolet/infrared mixing lead to strong constraints on possible candidates for a noncommutative extension of the Standard Model. We study a general class of noncommutative models consistent with these restrictions. Specifically we consider models based upon a gauge theory with the gauge group U(N_1)\times U(N_2)\times ...\times U(N_m) coupled to matter fields transforming in the (anti)-fundamental, bi-fundamental and adjoint representations. We pay particular attention to overall trace-U(1) factors of the gauge group which are affected by the ultraviolet/infrared mixing. Typically, these trace-U(1) gauge fields do not decouple sufficiently fast in the infrared, and lead to sizable Lorentz symmetry violating effects in the low-energy effective theory. In a 4-dimensional theory on a continuous space-time making these effects unobservable would require making the effects of noncommutativity tiny, M_NC>>M_P. This severely limits the phenomenological prospects of such models. However, adding additional universal extra dimensions the trace-U(1) factors decouple with a power law and the constraint on the noncommutativity scale is weakened considerably. Finally, we briefly mention some interesting properties of the photon that could arise if the noncommutative theory is modified at a high energy scale.
description: 22 pages, 4 figures, 1 table. Proceedings for the CORFU 2005 Satellite workshop: ``Noncommutative Geometry in Field and String Theories''
Erratum: Quantum Montgomery identity and quantum estimates of Ostrowski type inequalities
Creators: name: Aljinović, Andrea Aglić
name: Kovačević, Domagoj
name: Puljiz, Mate
Publisher: name: arXiv
Year: 2020
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 05A30, 26D10, 26D15

description: We disprove and correct some recently obtained results regarding Montgomery identity for quantum integral operator and Ostrowski type inequalities involving convex functions.
description: 5 pages
Finite-temperature phase transitions in quasi-one-dimensional molecular conductors
Creators: name: Seo, Hitoshi
name: Motome, Yukitoshi
name: Kato, Takeo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Phase transitions in 1/4-filled quasi-one-dimensional molecular conductors are studied theoretically on the basis of extended Hubbard chains including electron-lattice interactions coupled by interchain Coulomb repulsion. We apply the numerical quantum transfer-matrix method to an effective one-dimensional model, treating the interchain term within mean-field approximation. Finite-temperature properties are investigated for the charge ordering, the "dimer Mott" transition (bond dimerization), and the spin-Peierls transition (bond tetramerization). A coexistent state of charge order and bond dimerization exhibiting dielectricity is predicted in a certain parameter range, even when intrinsic dimerization is absent.
description: to be published in J. Phys. Soc. Jpn., Vol. 76 (2007) No. 1 (5 pages, 4 figures); typo corrected
Adiabatic Floquet-Wave Expansion for the Analysis of Leaky-Wave Holograms Generating Polarized Vortex Beams
Creators: name: Amini, Amrollah
name: Oraizi, Homayoon
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: This paper presents the combination of aperture field estimation (AFE) technique and adiabatic Floquet-wave (AFW) expansion method for the analysis of leaky-wave holograms capable of generating orbital angular momentum (OAM) vortex waves. In these formulations the propagation and leakage constants are theoretically estimated and as a result the aperture field and far-zone field are calculated. This theoretical approach significantly reduces the computational complexity in such a way that the analysis of holograms with large dimensions is possible with low memory requirements. Isotropic and anisotropic unit cells are used to realize the holograms, which anisotropic structures show better performance in the control of wave polarization. The holograms are designed to generate vortex beams with topological charge of m=2 and circular polarization states in the microwave regime. To evaluate the accuracy of the proposed method, the results of theoretical model and full-wave simulations are compared, with good agreement.
The old anticentre open cluster Berkeley 32: membership and fundamental parameters
Creators: name: D'Orazi, V.
name: Bragaglia, A.
name: Tosi, M.
name: Di Fabrizio, L.
name: Held, E. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have obtained medium-low resolution spectroscopy and BVI CCD imaging of Berkeley 32, an old open cluster which lies in the anticentre direction. From the radial velocities of 48 stars in the cluster direction we found that 31 of them, in crucial evolutionary phases, are probable cluster members, with an average radial velocity of +106.7 (sigma = 8.5) km/s. From isochrone fitting to the colour magnitude diagrams of Berkeley 32 we have obtained an age of 6.3 Gyr, (m-M)0 = 12.48 and E(B-V) = 0.10. The best fit is obtained with Z=0.008. A consistent distance, (m-M)0 ~= 12.6 +/- 0.1, has been derived from the mean magnitude of red clump stars with confirmed membership; we may assume (m-M)0 ~= 12.55 +/- 0.1. The colour magnitude diagram of the nearby field observed to check for field stars contamination looks intriguingly similar to that of the Canis Major overdensity.
description: MNRAS, in press. Degraded resolution for Fig. 4
Stabilization of dipole solitons in nonlocal nonlinear media
Creators: name: Ye, Fangwei
name: Kartashov, Yaroslav V.
name: Torner, Lluis
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We address the stabilization of dipole solitons in nonlocal nonlinear materials by two different approaches. First, we study the properties of such solitons in thermal nonlinear media, where the refractive index landscapes induced by laser beams strongly depend on the boundary conditions and on the sample geometry. We show how the sample geometry impacts the stability of higher-order solitons in thermal nonlinear media and reveal that dipole solitons can be made dynami-cally stable in rectangular geometries in contrast to their counterparts in thermal samples with square cross-section. Second, we discuss the impact of the saturation of the nonlocal nonlinear response on the properties of multipole solitons. We find that the saturable response also stabi-lizes dipole solitons even in symmetric geometries, provided that the input power exceeds a criti-cal value.
description: 29 pages, 8 figures, to appear in Phys. Rev. A
Integrative systems biology approach to predict Drug-Induced Liver Injury
Creators: name: Aguirre-Plans, Joaquim
name: Terezinha Souza
name: Piñero, Janet
name: Callegaro, Giulia
name: Kunnen, Steven J.
name: Furlong, Laura I.
name: Oliva, Baldo
name: Guney, Emre
Publisher: name: F1000 Research Limited
Year: 2019

description: Drug-induced liver injury (DILI) has a relatively high incidence rate, estimated to affect around 20 in 100,000 inhabitants worldwide each year. Many drugs ranging from pain killers to anti-tuberculous treatments can cause DILI. Despite DILI being one of the leading causes of acute liver failure, the pathophysiology of DILI is poorly understood and pinpointing the toxicity of compounds in human liver remains non-trivial. Accordingly, several methods have been proposed to predict the hepatotoxicity of compounds. Among these, machine learning models trained using drug estructural features have shown a good performance. Furthermore, the incorporation of gene- and pathway-level signatures from transcriptomics data has shown a high predictive accuracy using Deep Neural Networks. In this work, to predict DILI, we investigated combining gene expression data from the Connectivity Map (CMap), target binding information and chemical similarity of drugs upon drug treatment into ensemble learning methods using random forest classifiers and gradient boosting machines.
The magnetotransport properties of La0.7Sr0.3MnO3/BaTiO3 superlattices grown by pulsed laser deposition technique
Creators: name: Murugavel, P.
name: Prellier, W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have investigated the magnetotransport properties of La0.7Sr0.3MnO3/BaTiO3 superlattices, grown on SrTiO3 substrate by pulsed laser deposition technique, both with current-in-plane and current-perpendicular-to-the-plane directions. Several features indicate the presence of magnetic inhomogeneities at the interfaces which is independent of BaTiO3 layer thickness variation. First, the magnetic property in the superlattices decreases. Second, a hysteresis in magnetoresistance due to the relaxation of the resistive state is observed. Third, a threshold under an applied magnetic field in the magnetoresistance is seen. Such behaviors are in agreement with the phase separation scenario which could be the possible reason for these magnetic inhomogeneities at the interfaces. On the contrary, the magnetoresistance with the current-perpendicular-to-the-plane direction is mostly attributed to the tunneling effect along with the ordering of the spin at the interface. This study confirms the importance of the interfaces in superlattices that can be used to control novel physical properties in oxide materials.
description: 12 pages, 4 figures, to be published in Jour. Appl. Phys
Error tolerance of two-basis quantum key-distribution protocols using qudits and two-way classical communication
Creators: name: Nikolopoulos, Georgios M.
name: Ranade, Kedar S.
name: Alber, Gernot
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the error tolerance of quantum cryptographic protocols using $d$-level systems. In particular, we focus on prepare-and-measure schemes that use two mutually unbiased bases and a key-distillation procedure with two-way classical communication. For arbitrary quantum channels, we obtain a sufficient condition for secret-key distillation which, in the case of isotropic quantum channels, yields an analytic expression for the maximally tolerable error rate of the cryptographic protocols under consideration. The difference between the tolerable error rate and its theoretical upper bound tends slowly to zero for sufficiently large dimensions of the information carriers.
description: 10 pages, 1 figure
AGN polarization modeling with STOKES
Creators: name: Goosmann, Rene W.
name: Gaskell, C. Martin
name: Shoji, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We introduce a new, publicly available Monte Carlo radiative transfer code, STOKES, which has been developed to model polarization induced by scattering off free electrons and dust grains. It can be used in a wide range of astrophysical applications. Here, we apply it to model the polarization produced by the equatorial obscuring and scattering tori assumed to exist in active galactic nuclei (AGNs). We present optical/UV modeling of dusty tori with a curved inner shape and for two different dust types: one composition reproduces extinction properties of our Galaxy, and the other is derived from composite quasar spectra. The polarization spectra enable us to clearly distinguish between the two dust compositions. The STOKES code and its documentation can be freely downloaded from http://www.stokes-program.info/.
description: 2 pages, 1 figure, conference proceedings of the Symposium 238 at the IAU General Assembly held in August 2006 in Prague. Eds. Vladimir Karas & Giorgio Matt, to be published by Cambridge University Press
Disjoint spread systems and fault location
Creators: name: Colbourn, Charles J.
name: Fan, Bingli
name: Horsley, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05B30 (Primary) 05A18, 05D99, 62K05, 68P10 (Secondary)

description: When $k$ factors each taking one of $v$ levels may affect the correctness or performance of a complex system, a test is selected by setting each factor to one of its levels and determining whether the system functions as expected (passes the test) or not (fails). In our setting, each test failure can be attributed to at least one faulty (factor, level) pair. A nonadaptive test suite is a selection of such tests to be executed in parallel. One goal is to minimize the number of tests in a test suite from which we can determine which (factor, level) pairs are faulty, if any. In this paper, we determine the number of tests needed to locate faults when exactly one (or at most one) pair is faulty. To do this, we address an equivalent problem, to determine how many set partitions of a set of size $N$ exist in which each partition contains $v$ classes and no two classes in the partitions are equal.
description: 16 pages, 0 figures
Μικροπειράματα Μαθηματικών στο Ψηφιακό Σχολείο: Εμπλοκή των εκπαιδευτικών ως σχεδιαστών δραστηριοτήτων
Creators: name: Καζάνα, Αγάπη κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Μικροπειράματα
Ψηφιακό σχολείο
εκπαιδευτικοί πρωτοβάθμιας εκπαίδευσης
microexperiments
digital school
elementary school teachers

description: Η παρούσα εργασία αποτελεί μια πρώιμη προσπάθεια καταγραφής του πώς προτίθενται οι εκπαιδευτικοί της πρωτοβάθμιας εκπαίδευσης να αξιοποιήσουν τα μικροπειράματα των Μαθηματικών που προστέθηκαν πρόσφατα στα διαδραστικά σχολικά εγχειρίδια. Χρησιμοποιήθηκαν συνολικά 7 μικροπειράματα, που χρησιμοποιούν διαφορετικές τεχνολογικές εφαρμογές. Τα αποτελέσματα δείχνουν ότι στην πλειοψηφία τους οι εκπαιδευτικοί προτιμούν να κάνουν χρήση των μικροπειραμάτων χωρίς καμία αλλαγή, λίγοι προτείνουν αλλαγές στην εκφώνηση ή τη διεπαφή και ακόμη λιγότεροι ταυτόχρονη αλλαγή και στα δύο. Η τεκμηρίωση που συνοδεύει τις απαντήσεις των εκπαιδευτικών έδωσε την ευκαιρία να κατηγοριοποιηθούν αυτές περαιτέρω με βάση μια σειρά από κριτήρια που σχετίζονται με τις επιλογές των εκπαιδευτικών. Τέλος προτείνονται κάποιες εξηγήσεις που προσπαθούν να ερμηνεύσουν τη στάση τους κάθε φορά σε σχέση με κάθε ένα από τα μικροπειράματα και την προθυμία ή την αδυναμία να προτείνουν έναν ανασχεδιασμό των μικροπειραμάτων.
description: The current master thesis is an early attempt to record the intention of elementary school teachers’ to exploit a new kind of mathematical activities (called “microexperiments”) thaw were recently added to the digital interactive school textbooks. Seven microexperiments were used in total based on different kinds of technology. The results show that the teachers mainly prefer to use these microexperiments as they are. Few propose some changes in the statements of the activities or in the interface and even fewer changes to both of them. The explanation accompanied the teachers’ suggestions allowed the categorization of these suggestions according to a series of criteria as they emerged through qualitative analysis. Finally, some interpretations of the teachers’ choices are proposed trying to explain the teachers’ attitude or their inability to suggest a redesign of the specific microexperiments.
Observation of quantum interference conductance fluctuations in metal rings with strong spin-orbit coupling
Creators: name: Ramos, R.
name: Makiuchi, T.
name: Kikkawa, T.
name: Daimon, S.
name: Oyanagi, K.
name: Saitoh, E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigated the magnetotransport properties of mesoscopic platinum nanostructures (wires and rings) with sub-100 nm lateral dimensions at very low temperatures. Despite the strong spin-orbit interaction in platinum, oscillations of the conductance as a function of the external magnetic field due to quantum interference effects was found to appear. The oscillation was decomposed into Aharonov-Bohm periodic oscillations and aperiodic fluctuations of the conductance due to a magnetic flux piercing the loop of the ring and the metal wires forming the nanostructures, respectively. We also investigated the magnetotransport under different bias currents to explore the interplay between electron phase coherence and spin accumulation effects in strong spin-orbit conductors.
description: 4 pages, 4 figures
Another Look at the Flavour Structure of the Littlest Higgs Model with T-Parity
Creators: name: Blanke, Monika
name: Buras, Andrzej J.
name: Poschenrieder, Anton
name: Recksiegel, Stefan
name: Tarantino, Cecilia
name: Uhlig, Selma
name: Weiler, Andreas
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the mixing matrix V_Hd that describes the charged and neutral current interactions between ordinary down-quarks and up- and down-mirror quarks in the Littlest Higgs Model with T-parity (LHT). We point out that this matrix in addition to three mixing angles contains three physical complex phases and not only one as used in the present literature. We explain the reason for the presence of two additional phases, propose a new standard parameterization of V_Hd and briefly comment on the relevance of these new phases for the phenomenology of FCNC processes in the LHT model. In a separate paper we present a detailed numerical analysis, including these new phases, of K and B physics, with particular attention to the most interesting rare decays.
description: 9 pages
Ιστορικές όψεις στα κείμενα των αντιεξουσιαστικών ομάδων της μεταπολίτευσης στην Ελλάδα (1974-2008)
Creators: name: Τσιούμας, Αριστοτέλης Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Αναρχία
Αντιεξουσιαστικός
Κοινωνικό Κίνημα
Anarchy
Anti-authoritarian
Social movement

description: Η διπλωματική αυτή εργασία σχετίζεται με την καταγραφή ιστορικών όψεων στα κείμενα των αντιεξουσιαστικών ομάδων της μεταπολίτευσης στην Ελλάδα, με στόχο να καταγράψει τις διάφορες οπτικές και προσεγγίσεις σε σχέση με κεντρικά συμβάντα της παγκόσμιας όσο και της ελληνικής ιστορίας όπως προκύπτουν μέσα από την έρευνα σε έντυπο αρχειακό υλικό αντιεξουσιαστικών ομάδων και οργανώσεων. Στο πρώτο κεφάλαιο γίνεται μια συνοπτική αναδρομή στην ιστορία του αναρχισμού στην Ελλάδα, από τα μέσα του 19ου αιώνα, όταν εμφανίζεται ως οργανωμένο ιδεολογικό ρεύμα μέχρι το 2008, που αποτελεί το χρονικό όριο αυτής της εργασίας. Στο δεύτερο κεφάλαιο επιχειρείται η ερμηνευτική προσέγγιση της εμφάνισης και της ανάπτυξης του σύγχρονου αντιεξουσιαστικού ρεύματος από την μεταπολίτευση του 1974 κι έπειτα. Στο τρίτο και τελευταίο κεφάλαιο παρατίθενται και σχολιάζονται τα ευρήματα της αρχειακής έρευνας. Επιπλέον γίνονται διάφορες συγκρίσεις των κατατεθειμένων προσεγγίσεων μεταξύ τους, όσο και σε σχέση με άλλη βιβλιογραφία.
description: This thesis is related to the search and the record of Historical aspects in the texts of the anti-authoritarian groups during the period of “Metapolitefsi” in Greece, with the aim to record the various perspectives and approaches about the key events of the world and the Greek history. This objective has been approached through research in archival material from antiauthoritarian groups and organizations. The first chapter contains a brief review of the history of anarchism in Greece, from the mid-19th century, when it first appears as an organized ideological stream until 2008, which constitutes the end of the period under investigation. In the second chapter an interpretative approach of the emergence and the development of modern anti-authoritarian movement from in 1974 and beyond, is attempted. In the third chapter, the findings of archival research are cited and discussed. Furthermore, this chapter contains comparisons between the various approaches of the authors of the texts and between these approaches and other bibliography.
Status of CME Search Before Isobar Collisions and Methods of Blind Analysis From STAR
Creators: name: Tribedy, Prithwish
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The STAR collaboration is currently pursuing the blind analysis of the data for isobar collisions that was performed at RHIC in the year 2018 to make a decisive test of the Chiral Magnetic Effect (CME). Why is it so difficult to detect signals of CME in the experiment? Do we really understand different sources of background? Why observing similar charge separation between p/d+A and A+A does not stop us from pursuing the search for CME? In this contribution, I attempt to address some of these questions and briefly outline a few recent STAR analyses based on new methods and observables to isolate the possible CME-driven signal and non-CME background contributions at the top RHIC energy. Finally, I describe the procedure for the blind analysis of the isobar data. An outstanding question remains -- what happens if we go down in energy? I address this by discussing how the new event-plane detector (EPD) upgrade provides a new capability at STAR towards CME search using the data from the RHIC BES-II program.
description: Part of Proceedings, 36th Winter Workshop on Nuclear Dynamics (WWND 2020) and STAR Note SN0755
Whey Proteins and Their Hydrolysates From Milks of Five Animal Species
Creators: name: El-Hatmi, Halima
name: Ben Yagoub, Meriem
name: Oussaief, Olfa
name: Samia, Azabou
name: Jrad, Zeineb
Publisher: name: Zenodo
Year: 2024
Subjects: milk of animal species; whey proteins; antioxidant activities; minerals; gastrointestinal digestion

description: Presented as Oral Presentation and in Book of Abstracts of  22nd International Days of Biotechnology. Tunisia. From December 26th to 29th 2024.
Memory in nanomagnetic systems: Superparamagnetism versus Spinglass behavior
Creators: name: Bandyopadhyay, Malay
name: Dattagupta, Sushanta
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The slow dynamics and concomitant memory (aging) effects seen in nanomagnetic systems are analyzed on the basis of two separate paradigms : superparamagnets and spinglasses. It is argued that in a large class of aging phenomena it suffices to invoke superparamagnetic relaxation of individual single domain particles but with a distribution of their sizes. Cases in which interactions and randomness are important in view of distinctive experimental signatures, are also discussed.
description: 11 pages and 19 figures