cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Information-Preserving Markov Aggregation
Creators: name: Geiger, Bernhard C.
name: Temmel, Christoph
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We present a sufficient condition for a non-injective function of a Markov chain to be a second-order Markov chain with the same entropy rate as the original chain. This permits an information-preserving state space reduction by merging states or, equivalently, lossless compression of a Markov source on a sample-by-sample basis. The cardinality of the reduced state space is bounded from below by the node degrees of the transition graph associated with the original Markov chain. We also present an algorithm listing all possible information-preserving state space reductions, for a given transition graph. We illustrate our results by applying the algorithm to a bi-gram letter model of an English text.
description: 7 pages, 3 figures, 2 tables
Arylthio analogs of 5,8-quinolinedione: Synthesis, characterization, antibacterial, and antifungal evaluations
Creators: name: Yildirim, Hatice
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: A set of bis(arylthio) substituted 5,8-quinolinedione derivatives were synthesized and investigated for their in vitro antimicrobial effect. The antibacterial and antifungal activities of 6,7-bis(arylthio)-5,8-quinolinedione (4a–f) and 6,7-bis(arylthio)-2-methyl-5,8-quinolinedione (5a–f) were evaluated against four gram-negative bacteria, three gram-positive bacteria, and three fungi strains. The bis(methoxyarylthio) 5,8-quinolinedione analogs presented better activity against especially gram-positive bacteria compared to bis(halogenarylthio) 5,8-quinolinedione analogs. Bis(3-methoxyarylthio) 5,8-quinolinedione (4e) had the same activity of the reference drug against Staphylococcus aureus. Bis(2-methoxyarylthio) 5,8-quinolinedione (4f) showed two-and-a half-fold better activity with 89.69 μM against Enterococcus faecalis, and two-fold better activity with 11.20 μM against Staphylococcus epidermidis. Bis(2-methoxyarylthio)-2-methyl-5,8-quinolinedione 5f exhibited five-fold higher antibacterial activity with 43.44 μM against E. faecalis and also eight-fold activity of the reference drug with 2.71 μM against S. epidermidis.
Polarized ensembles of random pure states
Creators: name: Cunden, F. D.
name: Facchi, P.
name: Florio, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A new family of polarized ensembles of random pure states is presented. These ensembles are obtained by linear superposition of two random pure states with suitable distributions, and are quite manageable. We will use the obtained results for two purposes: on the one hand we will be able to derive an efficient strategy for sampling states from isopurity manifolds. On the other, we will characterize the deviation of a pure quantum state from separability under the influence of noise.
description: 14 pages, 1 figure
Reactions of quinones with some amino alcohols, thiols and a UV-Vis study
Creators: name: Ibis, Cemil
name: Ayla, Sibel Sahinler
name: Babayeva, Elvira
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: In the present study, the reactions of 2,3-dichloro-1,4-naphthoquinone (DCNQ) with amino-1,2-propanediol and some thiols were investigated. Novel N-, N,S-, and S,O- substituted derivatives were obtained and the structures of all compounds were characterized by spectroscopic methods (FT-IR, 1H NMR, 13C NMR, Mass spectroscopy) and microanalysis. The absorption behaviors of novel compounds were also investigated with UV-Vis spectroscopy in different solvents, such as ethanol, tetrahydrofuran and chloroform.
Iron-promoted one-pot approach: Synthesis of isothiocyanates
Creators: name: Pendem, Venkata Bhavanarushi
name: Nannapaneni, Madhavi
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Molecular Biology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry

description: We have established a facile and versatile synthesis for the construction of isothiocyanates from their respective amines in the presence of an eco-friendly, inexpensive, easily available Iron catalyst under mild conditions. This reaction provides the target products through the formation of thiocarbamate salt as an intermediate. Both aromatic amines and aliphatic amines provided the respective target products in moderate to high yield under optimized reaction conditions. However, electron withdrawing substituents were difficult to give target product at room temperature, whereas, they obtained final products in good yield at moderate temperature. In addition, mechanistic studies were revealed that the synthetic route involved iron based subsequent reactions of addition and removal of sulfur.
Emergence of Majorana modes in cylindrical nanowires
Creators: name: Lim, Jong Soo
name: López, Rosa
name: Serra, Llorenç
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present calculations of Majorana edge modes in cylindrical nanowires of a semiconductor material with proximity-induced superconductivity. We consider a Rashba field along the transverse direction and an applied magnetic field in arbitrary orientation. Our analysis is based on exact numerical diagonalizations for the finite cylinder and on the complex band structure for the semi-infinite one. Orbital effects are responsible for a strong anisotropy of the critical field for which the effective gap vanishes. Robust Majorana modes are induced by the parallel field component and we find regimes with more than one Majorana mode on the same edge. Experimentally, they would manifest as a specific sequence of zero-bias conductances as a function of magnetic field. In the finite cylinder, a degradation of the Majorana modes due to interference of the two edges leads to oscillating non zero energies for large enough fields.
description: 6 pages, 6 figures
Numerical Integration of the Extended Variable Generalized Langevin Equation with a Positive Prony Representable Memory Kernel
Creators: name: Baczewski, Andrew D.
name: Bond, Stephen D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Generalized Langevin dynamics (GLD) arise in the modeling of a number of systems, ranging from structured fluids that exhibit a viscoelastic mechanical response, to biological systems, and other media that exhibit anomalous diffusive phenomena. Molecular dynamics (MD) simulations that include GLD in conjunction with external and/or pairwise forces require the development of numerical integrators that are efficient, stable, and have known convergence properties. In this article, we derive a family of extended variable integrators for the Generalized Langevin equation (GLE) with a positive Prony series memory kernel. Using stability and error analysis, we identify a superlative choice of parameters and implement the corresponding numerical algorithm in the LAMMPS MD software package. Salient features of the algorithm include exact conservation of the first and second moments of the equilibrium velocity distribution in some important cases, stable behavior in the limit of conventional Langevin dynamics, and the use of a convolution-free formalism that obviates the need for explicit storage of the time history of particle velocities. Capability is demonstrated with respect to accuracy in numerous canonical examples, stability in certain limits, and an exemplary application in which the effect of a harmonic confining potential is mapped onto a memory kernel.
description: 23 pages, 8 figures
Supersymmetric Heavy Higgs Bosons at the LHC
Creators: name: Arbey, Alexandre
name: Battaglia, Marco
name: Mahmoudi, Farvah
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The search for heavy Higgs bosons is an essential step in the exploration of the Higgs sector and in probing the Supersymmetric parameter space. This paper discusses the constraints on the M(A) and tan beta parameters derived from the bounds on the different decay channels of the neutral H and A bosons accessible at the LHC, in the framework of the phenomenological MSSM. The implications from the present LHC results and the expected sensitivity of the 14 TeV data are discussed in terms of the coverage of the [M(A) - tan beta] plane. New channels becoming important at 13 and 14 TeV for low values of tan beta are characterised in terms of their kinematics and the reconstruction strategies. The effect of QCD systematics, SUSY loop effects and decays into pairs of SUSY particles on these constraints are discussed in details.
description: 12 pages, 18 figures
A TextGCN-Based Decoding Approach for Improving Remote Sensing Image Captioning
Creators: name: Das, Swadhin
name: Sharma, Raksha
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Remote sensing images are highly valued for their ability to address complex real-world issues such as risk management, security, and meteorology. However, manually captioning these images is challenging and requires specialized knowledge across various domains. This letter presents an approach for automatically describing (captioning) remote sensing images. We propose a novel encoder-decoder setup that deploys a Text Graph Convolutional Network (TextGCN) and multi-layer LSTMs. The embeddings generated by TextGCN enhance the decoder's understanding by capturing the semantic relationships among words at both the sentence and corpus levels. Furthermore, we advance our approach with a comparison-based beam search method to ensure fairness in the search strategy for generating the final caption. We present an extensive evaluation of our approach against various other state-of-the-art encoder-decoder frameworks. We evaluated our method across three datasets using seven metrics: BLEU-1 to BLEU-4, METEOR, ROUGE-L, and CIDEr. The results demonstrate that our approach significantly outperforms other state-of-the-art encoder-decoder methods.
description: Under Review
Backreacted flavor in non-commutative gauge theories
Creators: name: Itsios, Georgios
name: Filev, Veselin G.
name: Zoakos, Dimitrios
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct the gravity dual of N=1 Non-Commutative SYM theory coupled to Nf smeared massless fundamental flavors. Our solution is analytic and non-perturbative. Near the origin the background reduces to the one corresponding to an ordinary SYM theory. At large radial distances, the dilaton diverges signaling the presence of a UV Landau pole. Considering a probe D3-brane we calculate the effective YM coupling and show that it is independent on the parameter of non-commutativity. We calculate the corresponding beta function and show that it remains positive at all energy scales.
description: 20 pages, minor corrections, updated to match the published version
Synthesis, structural characterization and antimicrobial activities of cyclochlorotriphosphazene derivatives derived from N-(1-Naphthyl)ethylenediamine
Creators: name: Ture, Sedat
name: Darcan, Cihan
name: Türkyılmaz, Osman
name: Kaygusuz, Özge
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: The nucleophilic substitution reactions of cylochlorotriphosphazene (N3P3Cl6) with N-(1-Naphthyl)ethylenediamine resulted in the following formation of partially and fully substituted cyclotriphosphazene derivatives: 2,4,4,6,6-pentachloro-2-open-chain-N-(1-Naphthyl) ethylendiamino-cyclotriphosphazatriene (3); 4,4,6,6-tetrachloro-2,2-spiro-N-(1-Naphthyl) ethylendiamino-cyclotriphosphazatriene (4); 2,6,6-trichloro-2-open-chain-4,4-spiro-N-(1-Naphthyl)ethylendiamino-cyclotriphosphazatriene (5); 2,4-dichloro-2,4-ansa-6,6-spiro-N-(1-Naphthyl)ethylendiamino)-cyclotriphosphazatriene (6); and 2,4,6-trichloro-2,4,6-non-gem-open-chain-N-(1-Naphthyl)ethylendiamino)-cyclotriphosphazatriene (7); 2,2,4,4,6,6-tri-spiro-N-(1-Naphthyl)ethylendiamino)-cyclotriphosphazatriene (8); 2,4-dichloro-2,4-cis-open-chain-6,6-spiro-N-(1-Naphthyl)ethylendiamino)-cyclotriphosphazatriene (9); and 2,4,6,6-tetrachloro -2,4-ansa-N-(1-Naphthyl)ethylendiamino)-cyclotriphosphazatriene (10). The reactions produced the 4,4,6,6-tetrachloro-2,2-spiro-N-(1-Naphthyl) ethylendiamino-cyclotriphosphazatriene (4) and 2,4,6,6-tetrachloro-2,4-ansa-N-(1-Naphthyl)ethylendiamino)-cyclotriphosphazatriene (10) derivatives as the major products in this system. The structures of the compounds were characterized by FT-IR, elemental analysis, TLC-MS, FT-IR, 1H, and 31P NMR spectral data. All the derived compounds (3–10) were screened for antimicrobial activity by using the broth-agar microdilution technique for the determination of MIC and MCC values. In this context, the compounds were examined against three different human pathogens; Escherichia coli W3110, Staphylococcus aureus ATCC 25923 and Candida albicans ATCC 10231. Except compounds 6 and 9, the rest of the compounds exhibited significant antimicrobial activity on E. coli (W3110), S. aureus (ATCC 25923) and C. albicans (ATCC 1023). Among the synthesized derivatives, compound 4 is the most active agent against the referenced bacteria.
Part I: A second approximation to the induced drag of a helicopter rotor in forward flight. Part II: The instantaneous induced velocity at the blade of a finite-bladed rotor in forward flight
Creators: name: Prouty, Raymond W.
Publisher: name: California Institute of Technology
Year: 1958
Subjects: Aeronautics

description: In Part I, a method is derived for determining the induced drag of a helicopter rotor in forward flight from the distribution of circulation in the wake. Charts of the correction factor to be applied to the ordinary momentum value of induced drag are presented for ranges of flight parameters currently in use.

In Part II, the expression for the instantaneous induced velocity at a blade is developed by application of the Biot and Savart Law to a helical wake surface on which the circulation distribution varies both with radius and with azimuth in a manner corresponding to the actual lift distribution on the blade.
van der Waals Interaction Energy Between Two Atoms Moving With Uniform Acceleration
Creators: name: Noto, Antonio
name: Passante, Roberto
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the interatomic van der Waals interaction energy between two neutral ground-state atoms moving in the vacuum space with the same uniform acceleration. We assume the acceleration orthogonal to their separation, so that their mutual distance remains constant. Using a model for the van der Waals dispersion interaction based on the interaction between the instantaneous atomic dipole moments, which are induced and correlated by the zero-point field fluctuations, we evaluate the interaction energy between the two accelerating atoms in terms of quantities expressed in the laboratory reference frame. We find that the dependence of the van der Waals interaction between the atoms from the distance is different with respect to the case of atoms at rest, and the relation of our results with the Unruh effect is discussed. We show that in the near zone a new term proportional to $R^{-5}$ adds to the usual $R^{-6}$ behavior, and in the far zone a term proportional to $R^{-6}$ adds to the usual $R^{-7}$ behavior, making the interaction of a longer range. We also find that the interaction energy is time-dependent, and the physical meaning of this result is discussed. In particular, we find acceleration-dependent corrections to the $R^{-7}$ (far zone) and $R^{-6}$ (near zone) proportional to $a^2t^2/c^2$; this suggests that significant changes to the van der Waals interaction between the atoms could be obtained if sufficiently long times are taken, without necessity of the extremely high accelerations required by other known manifestations of the Unruh effect.
description: 9 pages
A multi-physics and multi-scale numerical approach to microcracking and power-loss in photovoltaic modules
Creators: name: Paggi, Marco
name: Corrado, Mauro
name: Rodriguez, Maria Alejandra
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A multi-physics and multi-scale computational approach is proposed in the present work to study the evolution of microcracking in polycrystalline Silicon (Si) solar cells composing photovoltaic (PV) modules. Coupling between the elastic and the electric fields is provided according to an equivalent circuit model for the PV module where the electrically inactive area is determined from the analysis of the microcrack pattern. The structural scale of the PV laminate(the macro-model) is coupled to the scale of the polycrystals (the micro-model) using a multiscale nonlinear finite element approach where the macro-scale displacements of the Si cell borders are used as boundary conditions for the micro-model. Intergranular cracking in the Si cell is simulated using a nonlinear fracture mechanics cohesive zone model (CZM). A case-study shows the potentiality of the method, in particular as regards the analysis of the microcrack orientation and distribution, as well as of the effect of cracking on the electric characteristics of the PV module.
description: 20 pages, 17 figures, post-print of the article published in Composite Structures
Scaling the Indian Buffet Process via Submodular Maximization
Creators: name: Reed, Colorado
name: Ghahramani, Zoubin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Inference for latent feature models is inherently difficult as the inference space grows exponentially with the size of the input data and number of latent features. In this work, we use Kurihara & Welling (2008)'s maximization-expectation framework to perform approximate MAP inference for linear-Gaussian latent feature models with an Indian Buffet Process (IBP) prior. This formulation yields a submodular function of the features that corresponds to a lower bound on the model evidence. By adding a constant to this function, we obtain a nonnegative submodular function that can be maximized via a greedy algorithm that obtains at least a one-third approximation to the optimal solution. Our inference method scales linearly with the size of the input data, and we show the efficacy of our method on the largest datasets currently analyzed using an IBP model.
description: 13 pages, 8 figures
TESS Experiments: Everyone’s Doing It: Affective Polarization is Inflated by Social Pressure
Creators: name: Connors, Elizabeth C.
Publisher: name: Roper Center for Public Opinion Research
Year: 2023

description: Time-sharing Experiments for the Social Sciences (TESS) offers researchers the opportunity to capture the internal validity of experiments. Investigators submit proposals, and TESS fields successful proposals for free on a representative sample of adults in the United States. This experiment was conducted to test the effects of social influence in affective polarization. Respondents were randomly assigned to one of three treatments which cued various levels of perceived privacy (“results based on your responses may be published” vs. “your responses are completely private” vs. “Imagine your friends will read your responses”). A fourth condition (control) provided no privacy cue. A total of 3,333 partisan respondents participated. Respondents were asked to rate their feelings towards and trust in Democrats and Republicans and to indicate their attitudes about polarizing issue (climate change). Prior to treatment, respondents completed a measure of self-monitoring. This allowed for comparison of treatment effects and self-monitoring scores on affective polarization relative to the control.
A Hierarchical Mixed Membership Model for Multiple-Answer Multiple-Choice Items with Signal Detection Theory
Creators: name: Chen, Yi
name: Chae, Hui Soo
name: Natriello, Gary J.
Publisher: name: Columbia University
Year: 2019
Subjects: Educational tests and measurements
Educational tests and measurements--Data processing
Multiple-choice examinations

description: Multiple-answers multiple-choice (MAMC) items are widely used in educational testing and social research. However, inadequate studies and resources are allocated to the assessments of MAMC items. In this study, we introduce a new approach to analyze MAMC items using original response data (which alternatives have been selected) without scoring (correct or wrong). It has immense potential to provide rich information relevant for tractable psychological behavior and interpretable educational measurement. We use the signal detection theory (SDT) to measure the decision-making behavior across alternatives. Then, the mixed membership model is applied to capture the grouped data structure in the MAMC item. A simulation study of the HMM-SDT model is presented with a comparison to the tradition treatments in Item Response Theory (IRT).
Simple Models in Supersymmetric Quantum Mechanics on a Graph
Creators: name: Kan, Nahomi
name: Kobayashi, Koichiro
name: Shiraishi, Kiyoshi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study some sorts of dimensionally-deconstructed models for supersymmetric (Euclidean) quantum mechanics, or zero-dimensional field theory. In these models, we assign bosonic and fermionic variables to vertices and edges of a graph. We investigate a discrete version for the Gaussian model and the Wess-Zumino-type model on a graph. The topological index as a multiple integral is discussed on these models. In addition, we propose simple examples for supersymmetric extensions of the Lee-Wick model and the Galileon model. A model with two supersymmetries is also provided and generalization to `local' supersymmtric models is examined.
description: 19 pages, no figure. v3: typos fixed, references corrected
title: Filial Therapy and Intrafamiliar Violence Prevention
Creators: name: Juhásová, Andrea
name: Lulei, Martin
Publisher: name: SAR Journal
Year: 2019

description: In this work we target the significance of filial therapy by influencing mother-child relationships in cases where the child suffers from CAN syndrome. We describe the structure of filial therapy, the goals, the process and meaning. We also focus on the viewpoints of effectivity in the educational influence in children and their mothers who are coming from a dysfunctional environment influenced by violence. The goal of this work is to emphasize the significance of filial therapy in making space for building the healthy relationships within a family, and in tertiary prevention of familiar violence. We also point out the option of filial therapy being carried out not only in dysfunctional families, but also in others in which socio - pathological phenomena do not occur, but the parents are interested in improving their relationships with their children.
Thermodynamics of Local Causal Horizons
Creators: name: Mohd, Arif
name: Sarkar, Sudipta
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose an expression for the entropy density associated with the Local Causal Horizons in any diffeomorphism invariant theory of gravity. If the black-hole entropy of the theory satisfies the physical process version of the first law of thermodynamics then our proposed entropy satisfies the Clausius relation. Thus, our study shows that the thermodynamic nature of the spacetime horizons is not restricted to the black holes; it also applies to the local causal horizons in the neighborhood of any point in the spacetime.
description: 6 pages, 1 figure
On the density of primes with a set of quadratic residues or non-residues in given arithmetic progression
Creators: name: Wright, Steve
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11A15 (primary), 11M99 (secondary)

description: Let $\mathcal{A}$ denote a finite set of arithmetic progressions of positive integers and let $s \geq 2$ be an integer. If the cardinality of $\mathcal{A}$ is at least 2 and $U$ is the union formed by taking certain arithmetic progressions of length $s$ from each element of $\mathcal{A}$, we calculate the asymptotic density of the set of all prime numbers $p$ such that $U$ is a set of quadratic residues (respectively, quadratic non-residues) of $p$.
description: 26 pages, 1 figure. Several improvements to the previous version are made and several errors in that version are corrected. arXiv admin note: text overlap with arXiv:1111.2236
Design of Non-Binary Quasi-Cyclic LDPC Codes by ACE Optimization
Creators: name: Bazarsky, Alex
name: Presman, Noam
name: Litsyn, Simon
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: An algorithm for constructing Tanner graphs of non-binary irregular quasi-cyclic LDPC codes is introduced. It employs a new method for selection of edge labels allowing control over the code's non-binary ACE spectrum and resulting in low error-floor. The efficiency of the algorithm is demonstrated by generating good codes of short to moderate length over small fields, outperforming codes generated by the known methods.
description: Accepted to 2013 IEEE Information Theory Workshop
Particle scattering in turbulent plasmas with amplified wave modes
Creators: name: Lange, Sebastian
name: Spanier, Felix
name: Battarbee, Markus
name: Vainio, Rami
name: Laitinen, Timo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: High-energy particles stream during coronal mass ejections or flares through the plasma of the solar wind. This causes instabilities, which lead to wave growth at specific resonant wave numbers, especially within shock regions. These amplified wave modes influence the turbulent scattering process significantly. In this paper, results of particle transport and scattering in turbulent plasmas with excited wave modes are presented. The method used is a hybrid simulation code, which treats the heliospheric turbulence by an incompressible magnetohydrodynamic approach separately from a kinetic particle description. Furthermore, a semi-analytical model using quasilinear theory (QLT) is compared to the numerical results. This paper aims at a more fundamental understanding and interpretation of the pitch-angle scattering coefficients. Our calculations show a good agreement of particle simulations and the QLT for broad-band turbulent spectra; for higher turbulence levels and particle beam driven plasmas, the QLT approximation gets worse. Especially the resonance gap at $μ=0$ poses a well-known problem for QLT for steep turbulence spectra, whereas test-particle computations show no problems for the particles to scatter across this region. The reason is that the sharp resonant wave--particle interactions in QLT are an oversimplification of the broader resonances in test-particle calculations, which result from nonlinear effects not included in the QLT. We emphasise the importance of these results for both numerical simulations and analytical particle transport approaches, especially the validity of the QLT.
description: accepted, publishing process A&A still running
Gauge invariant backreaction in general single field models of inflation
Creators: name: Marozzi, Giovanni
name: Vacca, Gian Paolo
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In a general single field inflationary model we consider the effects of long wavelength scalar fluctuations on the effective expansion rate and equation of state seen by a class of free falling observers, using a physical gauge invariant formulation. In a previous work we showed that for a free massive inflaton no backreaction is observed within some constraints. In this paper we extend the validity of our previous results to the case of an arbitrary self-interacting inflation potential, working to second order in cosmological perturbation theory and to all order in slow-roll approximation. For these general inflationary models, we also show the equivalence of the free falling observers to the ones comoving with the inflaton field.
description: 5 pages, no figures. Minor corrections made and typos corrected. Version accepted for publication in PRD
Quasi-2D Liquid He-3
Creators: name: Ruggeri, Michele
name: Moroni, Saverio
name: Boninsegni, Massimo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Quantum Monte Carlo simulations at zero temperature of an ensemble of He-3 atoms adsorbed on Mg and Alkali substrates yield strong evidence of a thermodynamically stable liquid He-3 monolayer on all Alkali substrates, with the possible exception of Li. The effective 2D density is close to 0.02$ inverse square Angstroms on Na, making it the lowest density liquid in Nature. Its existence is underlain by zero-point atomic motion perpendicular to the substrate, whose effect is softening the short-range repulsion of the helium interatomic potential. The monolayer films should turn superfluid at a temperature of order 1 mK. No liquid film is predicted to form on Mg, or on stronger substrates such as graphite.
description: Three figures in color
Strategically Alliances and Distinction Competitions: A Case Study of Al-Sahara Libyan Bank and BNP Paribas French Bank Profitability Analysis
Creators: name: Husien, Munir Ali
name: Liyan, Han
Publisher: name: Zenodo
Year: 2021
Subjects: Profitability
strategic alliance
enterprise
competition
commercial banks

description: The enterprise who wish to continue in business should adopt the system of cooperation with other organizations engage in the activity, which assist it in achieving its aims and in achieving the objectives of economic institutions collaborating, the Utility is mutual in this case, because the common interest that emphasizes the need for cooperation. This paper derives a importance from the important strategic alliances and their role in fostering relationships and opportunities available to the national economy and to open local Markets to World Markets, From here the importance of the study of the strategic Alliances between Al-Sahara Libyan Bank and the French BNP Paribas Bank. The strategic alliance between economic option that promotes growth and development by allowing pooling capacities and competencies of allied economic organizations, this study and evaluation of its Profitability activities became important so as to ensure its efficiency and effectiveness. Where, the Profitability activity is one of the most important activities, which ensure the significant reason for the importance of evaluation. The research aims to study and analyze the Profitability which be applied at one of the commercial banks that operating in Libya (Sahara Bank), after entering into a strategic alliance with the French bank (BNP PARIBAS). The main results of the study followed: a) the lower on the value of profits, the financial position and deposit certificates. b) There is a decline of dealing with the loss of important elements customers for lack of confidence in the foreign partner.
Measuring and Modeling Behavioral Decision Dynamics in Collective Evacuation
Creators: name: Carlson, Jean M.
name: Alderson, David L.
name: Stromberg, Sean P.
name: Bassett, Danielle S.
name: Craparo, Emily M.
name: Gutierrez-Villarreal, Francisco
name: Otani, Thomas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Identifying and quantifying factors influencing human decision making remains an outstanding challenge, impacting the performance and predictability of social and technological systems. In many cases, system failures are traced to human factors including congestion, overload, miscommunication, and delays. Here we report results of a behavioral network science experiment, targeting decision making in a natural disaster. In each scenario, individuals are faced with a forced "go" versus "no go" evacuation decision, based on information available on competing broadcast and peer-to-peer sources. In this controlled setting, all actions and observations are recorded prior to the decision, enabling development of a quantitative decision making model that accounts for the disaster likelihood, severity, and temporal urgency, as well as competition between networked individuals for limited emergency resources. Individual differences in behavior within this social setting are correlated with individual differences in inherent risk attitudes, as measured by standard psychological assessments. Identification of robust methods for quantifying human decisions in the face of risk has implications for policy in disasters and other threat scenarios.
description: Approved for public release; distribution is unlimited
A study of fatigue notch sensitivity of 2014-T and 7075-T at elevated temperatures
Creators: name: Stalk, George
Publisher: name: California Institute of Technology
Year: 1955
Subjects: Aeronautics

description: This experiment was conducted to investigate the reversed-bending fatigue notch sensitivity of 2014-T and 7075-T at elevated temperatures. Tests were conducted on three configurations of specimens which had external circumferential notches, and on one configuration of un-notched specimens.

It was determined that the experimental stress concentration factor for both alloys, at room and elevated temperatures, increases with decreasing notch radius.

At room and elevated temperatures, the fatigue notch sensitivity for both 2014-T and 7075-T, generally increases with increasing notch radius.

The fatigue notch sensitivity factor and the experimental stress concentration factor for 2014-T increases with temperature, reaches a maximum in the range of 250[degrees]F to 350[degrees]F and then decreases at 400[degrees]F.

The experimental stress concentration factor for 7075-T increases almost linearly from room temperature to 400[degrees]F.

The fatigue notch sensitivity factor for 7075-T increases almost linearly from room temperature to 400[degrees]F, but only the 0.09 inch radius notch configuration shows a tendency to level off.
Unconventional superconducting phases on a two-dimensional extended Hubbard model
Creators: name: Huang, Wen-Min
name: Lai, Chen-Yen
name: Shi, Chuntai
name: Tsai, Shan-Wen
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the phase diagram of the extended Hubbard model on a two-dimensional square lattice, including on-site (U) and nearest-neighbor (V) interactions, at weak couplings. We show that the charge-density-wave phase that is known to occur at half-filling when 4V > U gives way to a d_{xy} -wave superconducting instability away from half-filling, when the Fermi surface is not perfectly nested, and for sufficiently large repulsive and a range of on-site repulsive interaction. In addition, when nesting is further suppressed and in presence of a nearest-neighbor attraction, a triplet time-reversal breaking (p_x + ip_y)-wave pairing instability emerges, competing with the d_{x2+y2} pairing state that is known to dominate at fillings just slightly away from half. At even smaller fillings, where the Fermi surface no longer presents any nesting, the (p_x +ip_y)-wave superconducting phase dominates in the whole regime of on-site repulsions and nearest-neighbor attractions, while d_{xy}-pairing occurs in the presence of on-site attraction. Our results suggest that zero-energy Majorana fermions can be realized on a square lattice in the presence of a magnetic field. For a system of cold fermionic atoms on a two-dimensional square optical lattice, both an on-site repulsion and a nearest-neighbor attraction would be required, in addition to rotation of the system to create vortices. We discuss possible ways of experimentally engineering the required interaction terms in a cold atom system.
Axial compression test of thin circular cylinders. A. Length effect. B. Visual study of buckling
Creators: name: Kanemitsu, Sunao
name: Nojima, Noble M.
Publisher: name: California Institute of Technology
Year: 1939
Subjects: thin circular cylinders
Aeronautics

description: A:

This portion of the report contains results obtained from compression tests on 95 thin-walled steel circular cylinder.  The tested cylinders were mainly of very small L/R ratio and large R/t ratio.

The results are compared with the existing theoretical failing stresses and are also presented in a non dimensional form, δ/E.  The failure stress is best given by the equation δ/E = 9(t/R)1.6 + .16(T/L)1.3.  This equation shall be limited for use for L/R greater than 0.1 and for L/R greater than 1.5 assume L/R = 1.5.

B:

A visual study of buckle formation is presented to aid future research which may be done on compression of thin cylinders.
title: Innovation, Local Wisdom and Value Creation in “Batik” Creative Industry
Creators: name:  Poernomo, Djoko
name:  Yuanita Soemartono, Agnes
name:  Eka Safitri, Rahayu
Publisher: name: SAR Journal
Year: 2019

description: This study aims at describing the relationship of strategic innovation, local wisdom and value creation to the sustainability of the batik creative industry in Banyuwangi Regency, Indonesia. The information is obtained from the principals who are also the craftsmen of the batik. The data are obtained through indepth-interview. The data collected is reviewed by using a taxonomic method. Findings show that the creative industry of batik implements an incremental innovation strategy by optimizing the "Gajah Oling" icon which is part of the local wisdom of Using Tribe in order to create value for gaining profit and sustainability.
Optical sum-frequency generation in whispering gallery mode resonators
Creators: name: Strekalov, Dmitry V.
name: Kowligy, Abijith S.
name: Huang, Yu-Ping
name: Kumar, Prem
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate sum-frequency generation in a nonlinear whispering gallery mode resonator between a telecom wavelength and the Rb D2 line, achieved through natural phase matching. Due to the strong optical field confinement and ultra high Q of the cavity, we achieve a 1000-fold enhancement in the conversion efficiency compared to existing waveguide-based devices. The experimental data are in agreement with the nonlinear dynamics and phase matching theory in the spherical geometry employed. The experimental and theoretical results point to a new platform to manipulate the color and quantum states of light waves toward applications such as atomic memory based quantum networking and logic operations with optical signals.
TA'LIM JARAYONIDA UNIVERSAL KOMPETENTSIYALARNI SHAKLLANTIRISHDA GENDER YONDASHUVI
Creators: name: Karimov, Habibulla
Publisher: name: Zenodo
Year: 2024

description: Ushbu tezisda ta’lim jarayonida gender ta'limi tizimining muammolarini aks ettiradi, ularni hal qilish uslublarini taklif qiladi. Ta'lim tizimidagi ta'lim tizimini o'rganish yo'nalishlari ta'kidlangan. Shuningdek, zamonaviy ta'lim tizimida kompetentsiya va universal kompetentsiya tushunchalari ochib berilgan. Gender yondashuvini hisobga olgan holda ta'lim sohasidagi universal kompetentsiyalar majmuasini o'zlashtirishga imkon beradigan pedagogik sharoitlar tavsiflanadi.
title: Screening of Kunun-zaki for the Presence of Extended Spectrum Beta Lactamase (ESBL) and Carbapenemase Producing Escherichia Coli
Creators: name:  Chikanma Edward, Kelechi
name:  Eric Alozie, Chukwuemeka
name:  Obioha Owuamalam, Precious
name:  Victor Onyekachi, Onyedikachi
Publisher: name: SAR Journal
Year: 2019

description: In this study, fifty Kunun-zaki beverages were examined for the presence of extended spectrum beta lactamase (ESBL) and carbapenemase producing Escherichia coli. 20% of the samples were found to be contaminated with E. coli, whose counts ranged from 7.00×102-1.72×104(cfu/ml). All isolates were subjected to in-vitro antibiotics susceptibility testing which revealed complete sensitivity of the isolates to ofloxacin and total resistance to the carbapenems. 8 isolates showed multi-drug resistance, out of which, 4 were confirmed to be ESBL and carbapenemase producers. Such contaminated beverages if not regulated, can serve as a means for the dissemination of multi-drug resistant E. coli.
title: Elderly and Young People's Attitudes towards Intergenerational Learning: The Slovak Perspective
Creators: name:  Moravčíková, Danka
name:  Verešová, Marcela
name: Hrebeňárová, Lucia
name: Laktišová, Petra
Publisher: name: SAR Journal
Year: 2019

description: Every generation has their own values, attitudes and identities that are learned, shaped and shared in a cultural context. Intergenerational learning can play a crucial role in achieving many societal, political and educational goals, and it can contribute to solving problems and issues related to active ageing, smart communities, ageism and age segregation, community identity, etc. The paper presents attitudes of the Slovak young people and seniors to intergenerational learning based on questionnaire survey on the sample of 1,447 respondents. In the first two parts, the authors provide an overview of existing approaches to conceptualization of the intergenerational model of learning and related concepts. The third section highlights intergenerational learning in the context of social inclusion and universities' third mission role. Finally, the paper presents a case study of 13 universities – members of The Association of Universities of the Third Age (AUTA) of Slovakia. It is aimed at a comparison of generational reflection of value hierarchy, benefits of intergenerational learning, and barriers to its implementation. The authors conclude by formulating the key findings and recommendations for implementation of intergenerational learning at the level of organisation, community, as well in the national context.
Modelling of Claim Counts in Automobile Third-party Liability Insurance
Creators: name: Simeunović, Ivana
name: Domazet, Ivana
name: Hanić, Hasan
name: Bugarčić, Milica
Publisher: name: Zenodo
Year: 2021
Subjects: Claim frequency
probability distribution functions
determining premium
poisson-gamma distribution

description: The aim of this paper is the analysis of the problem of modelling of claim counts in insurance that implies the study of variations of their occurrence through finding out the distribution which fits the observed data most adequately. As it is well known, in practice many cases of discontinuous variables can be modeled utilizing the Poisson distribution. However, examples of discontinuous random variables that do not adapt to this theoretical range model can often be found. One of these is the frequency of adverse events in motor third party liability insurance when some of the derived Poisson distributions may be more adequate, for example Poisson-Gamma (negative binomial) distribution, Poisson-Inverse Gaussian distribution, Poisson-LogNormal distribution, etc. Among the models that have been derived from the elements of Poisson processes, in this paper the model known as Good risk/bad risk (good driver/ ad driver) model is analyzed for the modeling of claim counts in automobile third-party liability insurance. In that sense, the most important aspects in the process of choosing the probability of claim numbers have been studied on a chosen sample from a Serbian insurance company and it has been found that appropriate sample analysis that was based upon the study of the previous experience of the insured was one of the key elements from the point of view of determining adequate premium systems.
MPEC 2023-W10 : 2023 WA
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 WA

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.