cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Manifestation of a gap due to the exchange energy in a spinor condensate
Creators: name: Navez, Patrick
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate the dynamic response of population transfer between two components of a finite temperature spinor Bose condensed gas to a time-dependent coupling potential. Comparison between results obtained in the Bogoliubov-Popov approximation (BPA) and in the generalized random phase approximation (GRPA) shows noticeable discrepancies. In particular, the inter-component current response function calculated in the GRPA displays a gapped spectrum due to the exchange interaction energy whereas the corresponding density response function is gapless. We argue that the GRPA is superior since, contrary to the BPA, it preserves the SU(2) symmetry and the f-sum rule associated to the spinor gas. In order to validate the approximation, we propose an experimental setup that allows the observation of the predicted gap.
description: 5 pages, 2 figures
Spontaneous Non-thermal Leptogenesis in High-scale Inflation Models
Creators: name: Endo, Motoi
name: Takahashi, Fuminobu
name: Yanagida, T. T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We argue that a non-thermal leptogenesis occurs spontaneously, without direct couplings of the inflaton with right-handed neutrinos, in a wide class of high-scale inflation models such as the chaotic and hybrid inflation. It is only a finite vacuum expectation value of the inflaton, or more precisely, a linear term in the Kahler potential, that is a prerequisite for the spontaneous non-thermal leptogenesis. To exemplify how it works, we show that a chaotic inflation model in supergravity naturally produces a right amount of baryon asymmetry via the spontaneous non-thermal leptogenesis. We also discuss the gravitino production from the inflaton.
description: 18 pages, 1 figure. v2: references added, accepted for publication in PRD
Optimal spatial transportation networks where link-costs are sublinear in link-capacity
Creators: name: Aldous, David J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Consider designing a transportation network on $n$ vertices in the plane, with traffic demand uniform over all source-destination pairs. Suppose the cost of a link of length $\ell$ and capacity $c$ scales as $\ell c^β$ for fixed $0
description: 13 pages
Numerical Investigation of Flow Structures Around a Cylindrical Afterbody Under Supersonic Condition
Creators: name: Das, Pratik
name: De, Ashoke
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Large Eddy Simulation (LES) with dynamic Smagorinsky model has been applied to numerically investigate the complicated flow structures that evolve in the near wake of a cylindrical after body aligned with a uniform Mach 2.46 flow. Mean flow field properties obtained from numerical simulations, such as axial velocity, pressure on base surface, have been compared with the experimental measurements as well as with other published results. It has been found that standard k-epsilon model fails to predict the flow properties in the recirculation region where better agreement has been observed between the data obtained from LES and experimental measurements. Flow Statistics like turbulent kinetic energy and primary Reynolds stress have also been calculated and compared with the results obtained from experiments in order to quantitatively assess the ability of LES technique to predict the turbulence properties of flow field in the highly compressible shear layer region. The data obtained from LES has been further analyzed to understand the evolution of coherent structures in the flow field. Proper Orthogonal Decomposition (POD) of the data obtained from central plane in the wake region has been performed in order to reveal the most energetic structures present in the flow field.
description: arXiv admin note: text overlap with arXiv:2102.06341
Cognitive Educational Models of Assessment, Programming and Instruction for Native Learners
Creators: name: Wilgosh, L.
name: Mulcahy, R.
Publisher: name: Canadian Journal of Native Education
Year: 2021

description: The article examines issues related to assessment and instruction for Native North American learners. The inappropriateness and inadequacy of assessment instruments normed on the majority population is demonstrated for Inuit learners. Bias in favor of the majority culture, in both assessment and curriculum content, has been identified as leading to low academic achievement of Native stu­ dents. A number of approaches to Native assessment and instruction are ex­amined, particularly attempts to identify Native learning styles and to adapt curriculum and instruction to match Native learning styles. A cognitive educa­tional model of assessment, programming, and instruction is proposed to meet the instructional needs of individual Native students for development of each student's full potential.
description: Canadian Journal of Native Education, Vol. 20 No. 1 (1993)
Pressure drop, liquid holdup and mass transfer in a graphite fibre bed with upward co-current gas-liquid flow
Creators: name: Hodgson, Isaac O. A.
Publisher: name: University of British Columbia
Year: 2008

description: The pressure drop, liquid holdup and overall mass transfer capacity have been studied in a graphite fibre electrode of porosity 0.90and fibre diameter 22 micrometer with cocurrent upward gas-liquid flow. A U-tube mercury manometer was used to measure the pressure drop in a graphite fibre bed 356 mm long by 38 mm wide by 3 mm thick. The gas and liquid were oxygen and water. For gas load 0 5 G 5 0.43kg/m2s and liquid load 1.46 5 L 5 7.30 kg/m2s, the pressure gradient ranged from 0.24 and 2.09 bar/m. The correlation for the pressure gradient is AP = L [ 0.36 + 1.182 (G/L ) 0.618 ]2 where AP = pressure gradient^bar/m L = liquid load^kg/m2s G = gas load^kg/m2s The quick closing valve method was used to measure the total liquid holdup in a graphite fibre bed 356 mm long by 38 mm wide by 3mm thick. Oxygen and 1M aqueous sodium hydroxide were the fluids used for the total liquid holdup measurements. For gas load 0 5 G 5 0.35 kg/m2s and liquid load 1.53 5 L 5 7.62 kg/m2s the liquid holdup ranged from 0.44 to 1.0. The correlation for the total liquid holdup is hL = 1 - 0.907 L 0.362 G 0.301 where hL = liquid holdup. The overall mass transfer capacity was determined by the electrochemical reaction method with the electro-reduction of oxygen to peroxide. The electrochemical reactor used consisted of graphite fibre cathode bed of dimension 89 mm long by 38 mm wide by3 mm thick. The cathode was separated from the anode by a cation membrane. Oxygen gas and 1M aqueous sodium hydroxide were the fluids used. For gas load 0.04 5 G 5 0.36 and liquid load 3.05 5L 5 7.62 the overall mass transfer capacity ranged from 3.4 to 9.0 -1 s . The correlation for the overall mass transfer capacity is Ka = 5 . 9 L0.371 G0.233 where K = overall mass transfer coefficient^m/s a = effective interfacial area for gas to solid^m-1 L = superficial liquid load^kg/m2s G = superficial gas load^kg/m2s
Intrinsic electron-doping in nominal "non-doped" superconducting (La,Y)$_2$CuO$_4$ thin films grown by dc magnetron sputtering
Creators: name: Zhao, L.
name: Wu, G.
name: Liu, R. H.
name: Chen, X. H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The superconducting nominal "non-doped" $La_{1.85}Y_{0.15}CuO_4$ (LYCO) thin films are successfully prepared by dc magnetron-sputtering and in situ post-annealing in vacuum. The best $T_{C0}$ more than 13K is achieved in the optimal LYCO films with highly pure c-axis oriented T'-type structure. In the normal state, the quasi-quadratic temperature dependence of resistivity, the negative Hall coefficient and effect of oxygen content in the films are quite similar to the typical Ce-doped T'-214 cuprates, suggesting that T'-LYCO shows the electron-doping nature like known n-type cuprates, and is not a band superconductor as proposed previously. The charge carriers are considered to be induced by oxygen deficiency.
description: 5 pages, 7 figures
Stabilizing the intensity of a wave amplified by a beam of particles
Creators: name: Bachelard, Romain
name: Antoniazzi, Andrea
name: Chandre, Cristel
name: Fanelli, Duccio
name: Leoncini, Xavier
name: Vittot, Michel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The intensity of an electromagnetic wave interacting self-consistently with a beam of charged particles as in a free electron laser, displays large oscillations due to an aggregate of particles, called the macro-particle. In this article, we propose a strategy to stabilize the intensity by re-shaping the macro-particle. This strategy involves the study of the linear stability (using the residue method) of selected periodic orbits of a mean-field model. As parameters of an additional perturbation are varied, bifurcations occur in the system which have drastic effect on the modification of the self-consistent dynamics, and in particular, of the macro-particle. We show how to obtain an appropriate tuning of the parameters which is able to strongly decrease the oscillations of the intensity without reducing its mean-value.
Crystalline phase discriminating neutron tomography using advanced reconstruction methods
Creators: name: Ametova, Evelina
name: Burca, Genoveva
name: Chilingaryan, Suren
name: Fardell, Gemma
name: Jørgensen, Jakob S.
name: Papoutsellis, Evangelos
name: Pasca, Edoardo
name: Warr, Ryan
name: Turner, Martin
name: Lionheart, William R. B.
name: Withers, Philip J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: Image and Video Processing (eess.IV)
subject: Optimization and Control (math.OC)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Time-of-flight neutron imaging offers complementary attenuation contrast to X-ray computed tomography (CT), coupled with the ability to extract additional information from the variation in attenuation as a function of neutron energy (time of flight) at every point (voxel) in the image. In particular Bragg edge positions provide crystallographic information and therefore enable the identification of crystalline phases directly. Here we demonstrate Bragg edge tomography with high spatial and spectral resolution. We propose a new iterative tomographic reconstruction method with a tailored regularisation term to achieve high quality reconstruction from low-count data, where conventional filtered back-projection (FBP) fails. The regularisation acts in a separated mode for spatial and spectral dimensions and favours characteristic piece-wise constant and piece-wise smooth behaviour in the respective dimensions. The proposed method is compared against FBP and a state-of-the-art regulariser for multi-channel tomography on a multi-material phantom. The proposed new regulariser which accommodates specific image properties outperforms both conventional and state-of-the-art methods and therefore facilitates Bragg edge fitting at the voxel level. The proposed method requires significantly shorter exposure to retrieve features of interest. This in turn facilitates more efficient usage of expensive neutron beamline time and enables the full utilisation of state-of-the-art high resolution detectors.
Update on Machine Learning in Data Analysis for Social Research
Creators: name: Bethmann, Arne
name: Beste, Jonas
name: Casalicchio, Giuseppe
name: Bischl, Bernd
Publisher: name: Zenodo
Year: 2019

description: With the increasing availability of both new large scale data sources as well as computational power, specific algorithms for the analysis of these data have seen widespread use and many refinements. Certain major developments in this area stem from computer science and computational statistics and are known as machine / statistical learning approaches. While these algorithms are widely used for predictive purposes their application to statistical inference is rather scarce. In comparison to traditional modelling approaches in the social sciences, especially (generalized) regression models, machine learning algorithms often allow for more flexible modelling strategies. Depending on the specific algorithm there are additional desirable features, for example automatic variable selection or implicit specification of interaction effects.

 Research questions in the social sciences usually aim at population inference for effects of certain variables of interest rather than prediction. Therefore a way to interpret the resulting machine learning models has to be developed if they are to be applied in social research. We use an approach adapting the idea of average marginal effects in order to estimate marginal and partial associations between response and predictors from a variety of classical machine learning algorithms. Whether these can be used to draw valid statistical or even causal inference is debatable and very much dependent on the specific data structure, modelling approach, and substantial research question at hand.

 The core estimation functionality has been implemented as an R-Package mimicking the features of STATA’s margins command, but using trained learners, e.g., from the extensive "Machine Learning in R" (mlr) package as a basis for the underlying predictions. Confidence intervals are provided via bootstrapping. While the package is still under development we will showcase the current functionality and provide analysis examples for social research questions.
Getting Started with eDNA Research
Creators: name: Vedrenne, Ana
Publisher: name: QUBES Educational Resources
Year: 2025

description: In this activity, students work together to explore metabarcoding data. First, students explore the data files they will be working on for their research project through a “scavenger hunt”. Students are then guided through the process of writing good scientific questions, testable hypotheses and measurable predictions that can be addressed with the available data. Finally, students summarize their project proposal and expected findings on one slide that will be presented to the class for feedback during the following session.
Mechanical Performance of 3D Printed Interpenetrating Phase Composites with Spinodal Topologies
Creators: name: Zhang, Yunfei
name: Hsieh, Meng-Ting
name: Valdevit, Lorenzo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The mechanical response of interpenetrating phase composites (IPCs) with stochastic spinodal topologies is investigated experimentally and numerically. Model polymeric systems are fabricated by Polyjet multi-material printing, with the reinforcing phase taking the topology of a spinodal shell, and the remaining volume filled by a softer matrix. We show that spinodal shell IPCs have comparable compressive strength and stiffness to IPCs with two well-established periodic reinforcements, the Schwarz P triply periodic minimal surface (TPMS) and the octet truss-lattice, while exhibiting far less catastrophic failure and greater damage resistance, particularly at high volume fraction of reinforcing phase. The combination of high stiffness and strength and a long flat plateau after yielding makes spinodal shell IPCs a promising candidate for energy absorption and impact protection applications, where the lack of material softening upon large compressive strains can prevent sudden collapse. Importantly, in contrast with all IPCs with periodic reinforcements, spinodal shell IPCs are amenable to scalable manufacturing via self-assembly techniques.
Adsorption and Adsolubilization of Organic Solutes Using  Rhamnolipid Biosurfactant-modified Surface
Creators: name: Davone Keomany
name: Asnachinda, Emma
Publisher: name: Faculty of Environment and Resourdce Studies,Mahidol University
Year: 2015
Subjects: Adsorption,Adsolubilization,Styrene,Phenantrene,Rhamnolipid,Biosurfactant

description: 1, 13, Environment and Natural Resources Journal
A geometric condition implying energy equality for solutions of 3D Navier-Stokes equation
Creators: name: Shvydkoy, Roman
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 76B03 (Primary); 76F02 (Secondary)

description: We prove that every weak solution $u$ to the 3D Navier-Stokes equation that belongs to the class $L^3L^{9/2}$ and $\n u$ belongs to $L^3L^{9/5}$ localy away from a 1/2-Hölder continuous curve in time satisfies the generalized energy equality. In particular every such solution is suitable.
description: 10 pages
Perturbations of Self-Accelerated Universe
Creators: name: Deffayet, Cedric
name: Gabadadze, Gregory
name: Iglesias, Alberto
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss small perturbations on the self-accelerated solution of the DGP model, and argue that claims of instability of the solution that are based on linearized calculations are unwarranted because of the following: (1) Small perturbations of an empty self-accelerated background can be quantized consistently without yielding ghosts. (2) Conformal sources, such as radiation, do not give rise to instabilities either. (3) A typical non-conformal source could introduce ghosts in the linearized approximation and become unstable, however, it also invalidates the approximation itself. Such a source creates a halo of variable curvature that locally dominates over the self-accelerated background and extends over a domain in which the linearization breaks down. Perturbations that are valid outside the halo may not continue inside, as it is suggested by some non-perturbative solutions. (4) In the Euclidean continuation of the theory, with arbitrary sources, we derive certain constraints imposed by the second order equations on first order perturbations, thus restricting the linearized solutions that could be continued into the full nonlinear theory. Naive linearized solutions fail to satisfy the above constraints. (5) Finally, we clarify in detail subtleties associated with the boundary conditions and analytic properties of the Green's functions.
description: 39 LaTex pages
Μελέτη χρονοσειρών χρηματοοικονομικών μεγεθών με χρήση κρυφών Μαρκοβιανών μοντέλων και νευρωνικών δικτύων
Creators: name: Κολαβέρι, Γκρεσίλντα Μπασκίμ
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Κρυφό Μαρκοβιανό μοντέλο
Αλγόριθμος Baum-Welch
Αλγόριθμος οπισθοδιάδοσης
Hidden Markov model
Baum-Welch algorithm
Back-propagation algorithm

description: Ο βασικός στόχος της εργασίας αυτής είναι η μελέτη της εξέλιξης της τιμής μιας μετοχής με τη χρήση των Κρυφών Μαρκοβιανών Μοντέλων (ΚΜΜ) και των Τεχνιτών Νευρωνικών Δικτύων (ΤΝΔ). Αρχικά, στο πρώτο μέρος της εργασίας δίνονται οι βασικοί ορισμοί των στοχαστικών διαδικασιών, των ΚΜΜ και των ΤΝΔ. Στη συνέχεια, γίνεται συνοπτική αναφορά στους βασικούς ορισμούς του χρηματιστηρίου και της μετοχής. Στο δεύτερο μέρος της εργασίας, η θεωρία που δόθηκε στο πρώτο μέρος εφαρμόζεται στις τιμές της μετοχής της GOOGLE. Αναλύεται η μεθοδολογία του ΚΜΜ, δίνεται ο αλγόριθμος που θα χρησιμοποιηθεί και υπολογίζονται οι παράμετροι του ΚΜΜ με τη χρήση του αλγορίθμου Baum – Welch ο οποίος αποτελεί ειδική περίπτωση του EM αλγορίθμου (Expectation – Maximization algorithm). Στη συνέχεια, ακολουθεί η εφαρμογή με τα ΤΝΔ. Συγκεκριμένα, επεξηγείται ο αλγόριθμος της οπισθοδιάδοσης και στο τέλος παρουσιάζονται τα γραφήματα με τα αποτελέσματα της εφαρμογής. Τέλος, χρησιμοποιούμε τη κανονικοποιημένη ρίζα του μέσου τετραγωνικού σφάλματος (NRMSE) ως κριτήριο για να εξετάσουμε κατά πόσο καλά προβλέπουν τα μοντέλα που θα χρησιμοποιήσουμε
description: The main purpose of this thesis is to study the evolution of stock prices using Hidden Markov Model (HMM) and Artificial Neural Network (ANN). In the first part, we analyze the theory that is used in this thesis. Firstly, the necessary concepts of stochastic processes are given and HMM and ANN are defined. Furthermore, there is made a brief reference to stock market’s and stock’s definitions. In the second part of this thesis, the theory is implemented over the stock prices of GOOGLE. HMM’s methodology is analyzed, the algorithm is given and HMM’s parameters are estimated through Baum –Welch which is a special case of the EM algorithm (Expectation – Maximization algorithm). Then, the application of the ANN method follows. Specifically, the back – propagation algorithm is clarified and the graphs of the results are displayed. Finally, using the normalized root mean squared error we examine the prediction ability of each model (HMM an ANN)
Shape of spreading and leveling gravity currents in a Hele-Shaw cell with flow-wise width variation
Creators: name: Zheng, Zhong
name: Ghodgaonkar, Aditya A.
name: Christov, Ivan C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the spreading and leveling of a gravity current in a Hele-Shaw cell with flow-wise width variations as an analog for flow {in fractures and horizontally heterogeneous aquifers}. Using phase-plane analysis, we obtain second-kind self-similar solutions to describe the evolution of the gravity current's shape during both the spreading (pre-closure) and leveling (post-closure) regimes. The self-similar theory is compared to numerical simulations of the partial differential equation governing the evolution of the current's shape (under the lubrication approximation) and to table-top experiments. Specifically, simulations of the governing partial differential equation from lubrication theory allow us to compute a pre-factor, which is \textit{a priori} arbitrary in the second-kind self-similar transformation, by estimating the time required for the current to enter the self-similar regime. With this pre-factor calculated, we show that theory, simulations and experiments agree well near the propagating front. In the leveling regime, the current's memory resets, and another self-similar behavior emerges after an adjustment time, which we estimate from simulations. Once again, with the pre-factor calculated, both simulations and experiments are shown to obey the predicted self-similar scalings. For both the pre- and post-closure regimes, we provide detailed asymptotic (analytical) characterization of the universal current profiles that arise as self-similarity of the second kind.
description: 33 pages, 7 figures, REVTeX 4-2; v2,v3: minor revision; accepted for publication in Physical Review Fluids
Flavor constraints for a Vector-like quark of Nelson-Barr type
Creators: name: Cherchiglia, A. L.
name: De Conto, G.
name: Nishi, C. C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Nelson-Barr (NB) mechanism to solve the strong CP problem assumes CP conservation, arranges vanishing $\barθ$ at tree-level and requires vector-like quarks (VLQs) to transmit the CP breaking to the SM. We analyze the flavor constraints coming from the presence of one such down type VLQ of NB type by performing a global fit on the relevant flavor observables. A comparison is made to the case of one generic VLQ. We find that the allowed parameter space for the VLQ Yukawa couplings and the mixing to the SM are confined to a region much smaller than in the generic case, making the NB case falsifiable in principle.
description: Appendices added
Existence and Uniqueness of the Measure of Maximal Entropy for the Teichmueller Flow on the Moduli Space of Abelian Differentials
Creators: name: Bufetov, Alexander I.
name: Gurevich, Boris M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 37A25

description: We show that the smooth measure is the unique measure of maximal entropy for the Teichmueller flow on the moduli space of abelian differentials.
description: 45 pages, revised version, results and proofs unchanged, exposition streamlined, introduction expanded.
Universal observable detecting all two-qubit entanglement and determinant based separability tests
Creators: name: Augusiak, Remigiusz
name: Demianowicz, Maciej
name: Horodecki, Pawel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We construct a single observable measurement of which mean value on four copies of an {\it unknown} two-qubit state is sufficient for unambiguous decision whether the state is separable or entangled. In other words, there exists a universal collective entanglement witness detecting all two-qubit entanglement. The test is directly linked to a function which characterizes to some extent the entanglement quantitatively. This function is an entanglement monotone under so--called local pure operations and classical communication (pLOCC) which preserve local dimensions. Moreover it provides tight upper and lower bounds for negativity and concurrence. Elementary quantum computing device estimating unknown two-qubit entanglement is designed.
description: 5 pages, RevTeX, one figure replaced by another, tight bounds on negativity and concurrence added, function proved to be a monotone under the pure LOCC, list of authors put in alphabetical order
Fast infrared variability from the black-hole candidate MAXI J1535$-$571 and tight constraints on the modelling
Creators: name: Vincentelli, F. M.
name: Casella, P.
name: Russell, D.
name: Baglio, M. C.
name: Veledina, A.
name: Maccarone, T.
name: Malzac, J.
name: Fender, R.
name: O'Brien, K.
name: Uttley, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the results regarding the analysis of the fast X-ray/infrared (IR) variability of the black-hole transient MAXI J1535$-$571. The data studied in this work consist of two strictly simultaneous observations performed with XMM-Newton (X-rays: 0.7$-$10 keV), VLT/HAWK-I ($K_{\rm s}$ band, 2.2 $μ$m) and VLT/VISIR ($M$ and $PAH2$_$2$ bands, 4.85 and 11.88 $μ$m respectively). The cross-correlation function between the X-ray and near-IR light curves shows a strong asymmetric anti-correlation dip at positive lags. We detect a near-IR QPO (2.5 $σ$) at $2.07\pm0.09$ Hz simultaneously with an X-ray QPO at approximately the same frequency ($f_0=2.25\pm0.05$). From the cross-spectral analysis a lag consistent with zero was measured between the two oscillations. We also measure a significant correlation between the average near-IR and mid-IR fluxes during the second night, but find no correlation on short timescales. We discuss these results in terms of the two main scenarios for fast IR variability (hot inflow and jet powered by internal shocks). In both cases, our preliminary modelling suggests the presence of a misalignment between disk and jet.
description: 12 pages, 7 figures. Accepted for publication in MNRAS
Confronting the magnetically-induced holographic composite inflation with observation
Creators: name: Ahmadvand, M.
name: Ashoorioon, A.
name: Fadafan, K. Bitaghsir
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the observational predictions of the phenomenological anti-de Sitter (AdS)/QCD inspired model, in which the inflaton field emerges in a four-dimensional strongly coupled gauge theory, in which the chiral symmetry breaking occurs through the formation of the quark condensate. Based on a top-down approach of AdS/QCD, using a D7-brane in the background of $N_c$ D3-branes, it has already been shown that chiral symmetry breaking in a magnetic field through the generation of the Higgs vacuum expectation value could be a second-order phase transition, although it was doubted that this scenario could lead to enough inflation. Using an iterative method, we consistently solve for the time-dependent parameters, including the embedding function of the D7-brane and the Hubble parameter of the expanding background. We show that with $N_c\sim 10^7$ and $g_{\rm{}_{UV}}\sim {\rm few}\times 0.1$, the predictions of the inflationary model are consistent with the most stringent constraints placed on the inflationary models by Planck 2018. Although the model is capable of producing a large amount of gravitational waves, $r\simeq 0.01$, the displacement of the canonical mass dimension-1 scalar field remains below the Planck mass, in violation of the Lyth bound.
description: 7 pages, 8 figures. v2: Matched the PRD version
Aboriginal Education in Canada as Internal Colonialism
Creators: name: Perley, David G.
Publisher: name: Canadian Journal of Native Education
Year: 2021

description: The power relationships of colonialism are recreated in the relationship between Canadian First Nations and the colonizing European-derived government. The work of some of the theoreticians who have explained Aboriginal/non-Aboriginal relationships in North America in terms of internal colonialism is reviewed. The internal colonial model, however, does not provide a good direction for local advocacy positions. The position derived from that observation is that in order to change the colonial relationship, it must be First Nations people who determine the pace and direction of First Nations development, and the process has to be driven and directed by Aboriginal people.
description: Canadian Journal of Native Education, Vol. 20 No. 1 (1993)
Ψηφιακή υπογραφή και κρυπτογραφία
Creators: name: Κουτίδου, Στυλιανή Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ψηφιακή υπογραφή
Κρυπτογραφία
Ευρωπαϊκές χώρες
Digital signature
Encryption
European countries

description: Η παρούσα διπλωματική αφορά την ψηφιακή υπογραφή και την κρυπτογραφία και συγκεκριμένα την αποδοχή της ψηφιακής υπογραφής από τους Έλληνες και την χρήση της ως έναν έγκυρο και ασφαλή τρόπο υπογραφής εγγράφων σε ψηφιακό περιβάλλον. Αρχικά, παρουσιάζεται ο ορισμός της ψηφιακής υπογραφής και αναλύεται η έννοια της κρυπτογραφίας. Στη συνέχεια, γίνεται αναφορά στην ευρεία εξάπλωση της ψηφιακής υπογραφής σε ευρωπαϊκές χώρες. Επιπλέον, μελετάται αν οι Έλληνες γνωρίζουν για τον συγκεκριμένο τρόπο υπογραφής και αν και πόσο συχνά τη χρησιμοποιούν για να υπογράψουν κάποιο έγγραφο μέσω έρευνας που πραγματοποιήθηκε διανέμοντας ερωτηματολόγια. Τα αποτελέσματα που προέκυψαν επισημαίνουν πως η κοινωνία σήμερα αν και είναι ανοιχτή σε νέες ιδέες τις αντιμετωπίζει με μια επιφυλακτικότητα που πιθανώς σχετίζεται με την οικονομική κατάσταση της χώρας. Εν κατακλείδι, καταλήγουμε στο συμπέρασμα ότι είναι επιτακτική η ανάγκη θεσμικών και οργανικών αλλαγών εκ μέρους της πολιτείας αλλά και η αλλαγή νοοτροπίας εκ μέρους των πολιτών, προκειμένου ο παραδοσιακός τρόπος υπογραφής να αντικατασταθεί από την ψηφιακή υπογραφή
description: The present thesis concerns digital signature and cryptography and, in particular, the acceptance of digital signature by Greeks and its use as a valid and secure way of signing documents in a digital environment. Initially, the definition of digital signature is introduced and the concept of cryptography is analyzed. Following is a reference to the widespread use of digital signature in European countries. In addition, it examines whether Greeks know about this particular way of signing and how often they use it to sign a document through a survey conducted by distributing questionnaires. The results show that society today, though it is open to new ideas, treats them with a cautiousness that is probably related to the country’s financial situation. In conclusion, we conclude that there is an urgent need for institutional and organic changes on the part of the state, as well as a change in the mentality of the citizens, in order to replace the traditional way of signing with digital signature
description: Σε συνεργασία με: Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
Simulation of three-dimensional quantum systems with projected entangled-pair states
Creators: name: Vlaar, Patrick C. G.
name: Corboz, Philippe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Tensor network algorithms have proven to be very powerful tools for studying one- and two-dimensional quantum many-body systems. However, their application to three-dimensional (3D) quantum systems has so far been limited, mostly because the efficient contraction of a 3D tensor network is very challenging. In this paper we develop and benchmark two contraction approaches for infinite projected entangled-pair states (iPEPS) in 3D. The first approach is based on a contraction of a finite cluster of tensors including an effective environment to approximate the full 3D network. The second approach performs a full contraction of the network by first iteratively contracting layers of the network with a boundary iPEPS, followed by a contraction of the resulting quasi-2D network using the corner transfer matrix renormalization group. Benchmark data for the Heisenberg and Bose-Hubbard models on the cubic lattice show that the algorithms provide competitive results compared to other approaches, making iPEPS a promising tool to study challenging open problems in 3D.
description: 12 pages, 13 figures
Questions, reflexives, verbs, nominal morphology, causatives, names, lexicon, applicatives
Creators: name: Khalil, Nubantood
name: Lee, Hyunjin
name: Liang, Siyu
name: Pfiffner, Alexandra
name: Sande, Hannah
name: Schaffer, Lily
name: Slone, Ares (Sasha)
name: Wyschogrod, Ezra
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: fia

description: Verbs include copular verbs. Names are traditional Nobiin names. Lexical elicitation includes numbers, verbs, and days.
Exploiting multilingual nomenclatures and language-independent text features as an interlingua for cross-lingual text analysis applications
Creators: name: Steinberger, Ralf
name: Pouliquen, Bruno
name: Ignat, Camelia
Publisher: name: arXiv
Year: 2006
Subjects: subject: Computation and Language (cs.CL)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences
subject: H.3.1; H.3.3; H.3.4

description: We are proposing a simple, but efficient basic approach for a number of multilingual and cross-lingual language technology applications that are not limited to the usual two or three languages, but that can be applied with relatively little effort to larger sets of languages. The approach consists of using existing multilingual linguistic resources such as thesauri, nomenclatures and gazetteers, as well as exploiting the existence of additional more or less language-independent text items such as dates, currency expressions, numbers, names and cognates. Mapping texts onto the multilingual resources and identifying word token links between texts in different languages are basic ingredients for applications such as cross-lingual document similarity calculation, multilingual clustering and categorisation, cross-lingual document retrieval, and tools to provide cross-lingual information access.
description: The approach described in this paper is used to link related documents across languages in the multilingual news analysis system NewsExplorer, which is freely accessible at http://press.jrc.it/NewsExplorer . 11 pages
Understanding Protein-Complex Assembly through Grand Canonical Maximum Entropy Modeling
Creators: name: Gasic, Andrei G.
name: Sarkar, Atrayee
name: Cheung, Margaret S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biomolecules (q-bio.BM)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: Inside a cell, heterotypic proteins assemble in inhomogeneous, crowded systems where the abundance of these proteins vary with cell types. While some protein complexes form putative structures that can be visualized with imaging, there are far more protein complexes that are yet to be solved because of their dynamic associations with one another. Yet, it is possible to infer these protein complexes through a physical model. However, it is often not clear to physicists what kind of data from biology is necessary for such a modeling endeavor. Here, we aim to model these clusters of coarse-grained protein assemblies from multiple subunits through the constraints of interactions among the subunits and the chemical potential of each subunit. We obtained the constraints on the interactions among subunits from the known protein structures. We inferred the chemical potential, that dictates the particle number distribution of each protein subunit, from the knowledge of protein abundance from experimental data. Guided by the maximum entropy principle, we formulate an inverse statistical mechanical method to infer the distribution of particle numbers from the data of protein abundance as chemical potentials for a grand canonical multi-component mixture. Using grand canonical Monte Carlo simulations, we captured a distribution of high-order clusters in a protein complex of Succinate Dehydrogenase (SDH) with four known subunits. The complexity of hierarchical clusters varies with the relative protein abundance of each subunit in distinctive cell types such as lung, heart, and brain. When the crowding content increases, we observed that crowding stabilizes emergent clusters that do not exist in dilute conditions. We, therefore, proposed a testable hypothesis that the hierarchical complexity of protein clusters on a molecular scale is a plausible biomarker of predicting the phenotypes of a cell.
description: 8 figures
Crystallization of mechanical pulp mill effluents through hydrate formation for the recovery of water
Creators: name: Gaarder, Cathrine
Publisher: name: University of British Columbia
Year: 2009

description: This work presents data toward the development of a new zero-liquid discharge (ZLD) system, the aim of which is to concentrate a liquid effluent thereby recovering process water. The crystallization technology used in this work is clathrate hydrate crystal formation. A screening of clathrate hydrate formers was performed and three were chosen, propane, carbon dioxide, and a 30-70 mol% propane - carbon dioxide mixture. Experiments were carried out with these substances in a vessel that was immersed in a temperature controlled bath. The effluent samples used in this study were generated at four pulp mills, an unbleached and a bleached thermo-mechanical pulp mill (TMP1, TMP2), a bleached chemi-thermo-mechanical pulp mill (BCTMP), and a combined bleached BCTMP/TMP mill (CTMP). The aim of this work was two-fold. The prime objective was to study experimentally the formation of clathrate hydrate crystals in these effluents. Experiments were designed to measure: (1) The temperature and pressure conditions at which hydrates form in mechanical pulp mill effluent; (2) The induction time and the growth rate of crystal formation; and (3) The ability of this apparatus to concentrate the effluents in-situ. In addition, effluent characteristic tests were performed, and qualitative process characteristics were noted. A secondary objective was to perform a survey on the liquid effluents generated at TMP and CTMP mills. This survey focused on the type, concentration, source, and environmental impacts associated with the contaminants typically present in these effluents, on the current discharge regulations, and on the available treatment options. It was determined that hydrate crystals can form in these effluents at temperatures above the normal freezing point of water. The measurements were compared with similar hydrate formation data in pure water. It was also found that the presence of impurities did not cause any appreciable change in the hydrate crystal pressure and temperature formation conditions with the TMP and CTMP effluent samples, but that the BCTMP effluent, which had a high electrolyte and organic content, did affect these conditions. It was found that the induction period and growth rate of hydrate crystals are dependent on the driving force and the prior history of the effluent. And finally, that some level of in-situ concentration was attainable with our apparatus.
Grain-boundary grooving and agglomeration of alloy thin films with a slow-diffusing species
Creators: name: Bouville, Mathieu
name: Chi, Dongzhi
name: Srolovitz, David J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a general phase-field model for grain-boundary grooving and agglomeration of polycrystalline alloy thin films. In particular, we study the effects of slow-diffusing species on grooving rate. As the groove grows, the slow species becomes concentrated near the groove tip so that further grooving is limited by the rate at which it diffuses away from the tip. At early times the dominant diffusion path is along the boundary, while at late times it is parallel to the substrate. This change in path strongly affects the time-dependence of grain boundary grooving and increases the time to agglomeration. The present model provides a tool for agglomeration-resistant thin film alloy design. keywords: phase-field, thermal grooving, diffusion, kinetics, metal silicides
description: 4 pages, 6 figures
Analysis of data from schizophrenia patients with use of graph theory
Creators: name: Γιαμλόγλου, Γεωργία Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Θεωρία γραφημάτων
Σχιζοφρένεια
Δίκτυα
Smallworld networks
Schizophrenia and brain psychiatric disorders
Graph theory

description: The purpose of the dissertation is to study the behavior of the metrics that result from brain networks of patients with schizophrenia. Indices from 18 studies of both schizophrenia and their respective health networks were presented. In addition, in all cases possible, we presented the results of the correlations of the indices by research as well as the statistically significant correlations with the PANSS scale, the dosage of treatment and the duration of the disease. We then created different categories based on the type of imaging and subcategories, based on the schizophrenia type, and explored possible increases and decreases. We also compared the values for each index overall, trying to come to a universal decision on the change that this psychiatric disorder creates in the structure of the cohesion of the brain, concluding that in some metrics the results are contradictory and in others more harmonized. Of particular interest is the smallworldness index as we know that human brain networks have the properties of small world networks. Finally, we presented the results of the regional analysis for the indices, hence the results with the alterations of the values of metrics for the different brain regions.
description: Σκοπός της διπλωματικής εργασίας είναι η μελέτη της συμπεριφοράς των δεικτών, οι οποίοι προκύπτουν από δίκτυα εγκεφάλων ασθενών που πάσχουν από σχιζοφρένεια. Οι δείκτες που προκύπτουν από 18 μελέτες τόσο για τα δίκτυα των σχιζοφρενών όσο και των αντιστοίχων υγειών, παρουσιάστηκαν. Επιπλέον, σε όσες περιπτώσεις ήταν δυνατόν παρουσιάσαμε τα αποτελέσματα από τις συσχετίσεις των δεικτών μεταξύ τους ανά έρευνα, τις στατιστικά σημαντικές συσχετίσεις με την κλίμακα PANSS, τη δοσολογία της αγωγής και τη διάρκεια της ασθένειας. Στη συνέχεια, δημιουργήσαμε διαφορετικές κατηγορίες με βάση το είδος της απεικόνισης και υποκατηγορίες, με βάση τον τύπο σχιζοφρένειας και ερευνήσαμε πιθανές αυξήσεις - μειώσεις. Ακόμη, συγκρίναμε συνολικά τις τιμές για κάθε δείκτη προσπαθώντας να καταλήξουμε σε κάποια καθολική απόφαση ως προς την αλλαγή που δημιουργεί η ψυχική αυτή ασθένεια στη δομή της συνεκτικότητας του εγκεφάλου, συμπεραίνοντας πως στις περιπτώσεις κάποιων δεικτών τα αποτελέσματα είναι αντικρουόμενα, ενώ σε άλλες πιο εναρμονισμένα. Ιδιαίτερο ενδιαφέρον παρουσιάζει ο δείκτης smallworldness καθώς γνωρίζουμε ότι τα δίκτυα του ανθρωπίνου εγκεφάλου έχουν τις ιδιότητες δικτύων «μικρού- περιβάλλοντος». Τέλος, παρουσιάσαμε τα τοπικά αποτελέσματα για τους δείκτες, δηλαδή τα αποτελέσματα με τις αυξήσεις – μειώσεις των δεικτών για τις διαφορετικές περιοχές του εγκεφάλου.
Cluster characters for triangulated 2-Calabi--Yau categories
Creators: name: Palu, Yann
Publisher: name: arXiv
Year: 2007
Subjects: subject: Representation Theory (math.RT)
subject: Category Theory (math.CT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: Starting from an arbitrary cluster-tilting object $T$ in a 2-Calabi--Yau category over an algebraically closed field, as in the setting of Keller and Reiten, we define, for each object $L$, a fraction $X(T,L)$ using a formula proposed by Caldero and Keller. We show that the map taking $L$ to $X(T,L)$ is a cluster character, i.e. that it satisfies a certain multiplication formula. We deduce that it induces a bijection, in the finite and the acyclic case, between the indecomposable rigid objects of the cluster category and the cluster variables, which confirms a conjecture of Caldero and Keller.
description: 21 pages. The numberings now coincide with those of the published version
Palatography photos, prepositions, case, comparatives, complements, minimal pairs
Creators: name: Gerais, Tanutamon
name: Barzilai, Maya
name: Graham, Madison
name: Oakley, Madeleine
name: Pennanen, Genevieve
name: Sande, Hannah
name: Wang, Zhuxin (Ivy)
name: Zhao, Yushi
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: fia

description: Complements are verbal complements, including elicitation of 'want.' Minimal pairs are tonal minimal pairs. In addition to WAV files and transcriptions from elicitation sessions, this bundle contains a ZIP folder of palatography photos. The photos show the tongue and roof of the mouth of speaker Tanutamon Gerais after producing four sounds: the alveolar nasal, palatal nasal, voiceless palatal affricate, and prenasalized voiceless palatal affricate.
CP Symmetry and Symplectic Modular Invariance
Creators: name: Ding, Gui-Jun
name: Feruglio, Ferruccio
name: Liu, Xiang-Gan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyze CP symmetry in symplectic modular-invariant supersymmetric theories. We show that for genus $g\ge 3$ the definition of CP is unique, while two independent possibilities are allowed when $g\le 2$. We discuss the transformation properties of moduli, matter multiplets and modular forms in the Siegel upper half plane, as well as in invariant subspaces. We identify CP-conserving surfaces in the fundamental domain of moduli space. We make use of all these elements to build a CP and symplectic invariant model of lepton masses and mixing angles, where known data are well reproduced and observable phases are predicted in terms of a minimum number of parameters.
description: 37 pages, 2 figures