cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Non-local effects reflect the jamming criticality in granular flows of frictionless particles
Creators: name: Perrin, Hugo
name: Wyart, Matthieu
name: Metzger, Bloen
name: Forterre, Yoël
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The jamming transition is accompanied by a rich phenomenology, such as hysteresis or non-local effects, which is still not well understood. Here we experimentally investigate a model frictionless granular layer flowing down an inclined plane, as a way to disentangle generic collective effects from those arising from frictional interactions. We find that thin frictionless granular layers are devoid of hysteresis, yet the layer stability is increased as it gets thinner. Rheological laws obtained for different layer thicknesses can be collapsed into a unique master curve, supporting that non-local effects are the consequence of the usual finite-size effects associated to the presence of a critical point. This collapse indicates that the so-called isostatic length $l^*$ governs the effect of boundaries on flow, and rules out other propositions made in the past.
description: 5 pages, 3 figures
Additional file 1 of Spectrum of cardiovascular diseases at a referral tertiary care hospital in Somalia, Mogadishu: an echocardiographic study
Creators: name: Alıcı, Gökhan
name: Genç, Ömer
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: 60506 Virology
subject: Computational Biology

description: Additional file 1. Demographic characteristics in children and adults patients.
Photoionization Models for High Density Gas
Creators: name: Kallman, T.
name: Bautista, M.
name: Deprince, J.
name: Garcia, J. A.
name: Mendoza, C.
name: Ogorzalek, A.
name: Palmeri, P.
name: Quinet, P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Relativistically broadened and redshifted 6.4 -- 6.9 keV iron K lines are observed from many accretion powered objects, including X-ray binaries and active galactic nuclei (AGN). Existence of gas close to the central engine implies large radiation intensities and correspondingly large gas densities if the gas is to remain partially ionized. Simple estimates indicate that high gas densities are needed to allow survival of iron against ionization. These are high enough that rates for many atomic processes are affected by mechanisms related to interactions with nearby ions and electrons. Radiation intensities are high enough that stimulated processes can be important. Most models currently in use for interpreting relativistic lines use atomic rate coefficients designed for use at low densities and neglect stimulated processes. In our work so far we have presented atomic structure calculations with the goal of providing physically appropriate models at densities consistent with line-emitting gas near compact objects. In this paper we apply these rates to photoionization calculations, and produce ionization balance curves and X-ray emissivities and opacities which are appropriate for high densities and high radiation intensities. The final step in our program will be presented in a subsequent paper: Model atmosphere calculations which incorporate these rates into synthetic spectra.
Non-Hermitian Hamiltonian versus E=0 localized states
Creators: name: Mazharimousavi, S. Habib
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze the zero energy solutions, of a two dimensional system which undergoes a non-radial symmetric, complex potential V(r,$ϕ$). By virtue of the coherent states concept, the localized states are constructed, and the consequences of the imaginary part of the potential are found both analytically and schematically.
description: 12 pages, 10 figures
A Deep Chandra X-ray Observatory Study of the Millisecond Pulsar Population in the Globular Cluster Terzan 5
Creators: name: Bogdanov, Slavko
name: Bahramian, Arash
name: Heinke, Craig O.
name: Ransom, Scott M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present an analysis of 745.6 ks of archival Chandra X-ray Observatory Advanced CCD Imaging Spectrometer data accumulated between 2000 and 2016 of the millisecond pulsar (MSP) population in the rich Galactic globular cluster Terzan 5. Eight of the 37 MSPs with precise positions are found to have plausible X-ray source matches. Despite the deep exposure, the remaining MSPs are either marginally detected or have no obvious X-ray counterparts, which can be attributed to the typically soft thermal spectra of rotation-powered MSPs, which are strongly attenuated by the high intervening absorbing column (~$10^{22}$ cm$^{-2}$) towards the cluster, and in some instances severe source crowding/blending. For the "redback" MSP binaries, PSRs J1748-2446P and J1748-2446ad, and the "black widow" binary PSRs J1748-2446O, we find clear evidence for large-amplitude X-ray variability at the orbital period consistent with an intrabinary shock origin. The third redback MSP in the cluster, PSR J1748-2446A, shows large amplitude variations in flux on time scales of years, possibility due to state transitions or intense flaring episodes from the secondary star.
description: 14 pages, 6 figures; submitted to the Astrophysical Journal
Optical response of high-$T_c$ cuprates: possible role of scattering rate saturation and in-plane anisotropy
Creators: name: Hussey, N. E.
name: Alexander, J. C.
name: Cooper, R. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a generalized Drude analysis of the in-plane optical conductivity $σ_{ab}$($T$,$ω$) in cuprates taking into account the effects of in-plane anisotropy. A simple ansatz for the scattering rate $Γ$($T$,$ω$), that includes anisotropy, a quadratic frequency dependence and saturation at the Mott-Ioffe-Regel limit, is able to reproduce recent normal state data on an optimally doped cuprate over a wide frequency range. We highlight the potential importance of including anisotropy in the full expression for $σ_{ab}$($T$,$ω$) and challenge previous determinations of $Γ$($ω$) in which anisotropy was neglected and $Γ$($ω$) was indicated to be strictly linear in frequency over a wide frequency range. Possible implications of our findings for understanding thermodynamic properties and self-energy effects in high-$T_c$ cuprates will also be discussed.
description: 8 pages, 7 figures. To be published in Physical Review B
REEEM-D2.2a_Innovation Readiness Level Report - Energy Storage Technologies
Creators: name: REEEM Project
Publisher: name: Zenodo
Year: 2019

description: n the framework of REEEM project, three innovation readiness level reports will be developed on three different energy technology groups. The first report, presented in this document, is dedicated to energy storage technologies. Five storage technologies are selected and studied in this report, namely Li-ion, flow batteries, supercapacitors, CAES, and hydrogen. The technologies are from different energy storage categories to provide a wider picture on the existing technologies in the market. This report will be complemented with the REEEM Technology and Innovation roadmap on energy storage applications (to be published on 31st July 2017), and a report reviewing techno-economic parameters of storage technologies (to be published on 28th February 2018).
Additional file 1 of Using the co-expression network of T cell-activation-related genes to assess the disease activity in Takayasu’s arteritis patients
Creators: name: Tian, Yixiao
name: Li, Jing
name: Tian, Xinping
name: Zeng, Xiaofeng
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Science Policy
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Developmental Biology
subject: Cancer
subject: 60506 Virology
subject: Computational Biology

description: Additional file 1: Supplementary Table 1. Primers used in real-time fluorescence quantitative polymerase chain reaction.
Inductive Entanglement Classification of Four Qubits under SLOCC
Creators: name: Lamata, L.
name: Leon, J.
name: Salgado, D.
name: Solano, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using an inductive approach to classify multipartite entangled states under stochastic local operations and classical communication introduced recently by the authors [Phys. Rev. A 74, 052336 (2006)], we give the complete classification of four-qubit entangled pure states. Apart from the expected degenerate classes, we show that there exist eight inequivalent ways to entangle four qubits. In this respect, permutation symmetry is taken into account and states with a structure differing only by parameters inside a continuous set are considered to belong to the same class.
description: 11 pages and no figures. Accepted in PRA
Hawking radiation, local temperatures, and nonequilibrium thermodynamics of the black holes with non-killing horizon
Creators: name: Li, Ran
name: Wang, Jin
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recently, a class of stationary black hole solutions with non-killing horizon in the asymptotic AdS bulk space was constructed to describe the far from equilibrium heat transport and particle transport from the boundary black holes via AdS/CFT correspondence. In this study, we calculate the spectrum of Hawking radiation of the black funnel solution. Our results indicate that the spectrum and the temperatures as well as the chemical potentials of the non-equilibrium black funnel do depend on one of the spatial coordinates. This is different from the equilibrium black holes with killing horizon, where the temperatures are uniform. Therefore, the black hole with non-killing horizon can be overall in non-equilibrium steady state while the Hawking temperature of the black funnel can be viewed as the local temperature and the corresponding Hawking radiation can be regarded as being in the local equilibrium with the horizon of the black funnel. By AdS/CFT, we discuss some possible implications of our results of local Hawking temperature for the non-equilibrium thermodynamics of dual conformal field theory. We further discuss the nonequilibrium thermodynamics of the black funnel, where the first law can be formulated as the entropy production rate being equal to the sum of the changes of the entropies from the system (black funnel) and environments while the second law is given by the entropy production being larger than or equal to zero. We found the time arrow emerged from the nonequilibrium black hole heat and particle transport dissipation. We also discuss how the nonequilibrium dissipation may influence the evaporation process of the black funnel.
Tuning the spontaneous exchange bias effect with Ba to Sr partial substitution in La$_{1.5}$(Sr$_{0.5-x}$Ba$_{x}$)CoMnO$_{6}$
Creators: name: Boldrin, M.
name: Silva, A. G.
name: Coutrim, L. T.
name: Jesus, J. R.
name: Macchiutti, C.
name: Bittar, E. M.
name: Bufaiçal, L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The spontaneous exchange bias (SEB) effect is a remarkable phenomenon recently observed in some reentrant spin-glass materials. Here we investigate the SEB in La$_{1.5}$(Sr$_{0.5-x}$Ba$_{x}$)CoMnO$_{6}$ double-perovskites, a system with multifarious magnetic phases for which a notable increase in the exchange bias field is observed for intermediate Sr/Ba concentrations. The Ba to Sr substitution leads to the enhancement of the crystal lattice, which is accompanied by the raise of both the effective magnetic moment ($μ_{eff}$) and the antiferromagnetic (AFM) transition temperature that is observed below the ferromagnetic ordering. Such increases are likely related to the increased fraction of Co$^{3+}$ in the high spin configuration, leading to the enhancement of Co$^{3+}$--O--Mn$^{4+}$ AFM phase and to the reduction in the uncompensation of the AFM coupling between Co and Mn. The combined effect of the increased $μ_{eff}$ and AFM phase plausible explains the changes in the SEB effect.
description: 4 pages, 3 figures
The Amaryllidaceae alkaloid, montanine, is a potential inhibitor of the Trypanosoma cruzi trans-sialidase enzyme
Creators: name: Manu, Prince
name: Mensah, Jehoshaphat Oppong
name: Gasu, Edward Ntim
name: Borquaye, Lawrence Sheringham
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified

description: Trypanosoma cruzi is the parasite that causes the chronic malady known as Chagas disease (CD). Only nifurtimox and benznidazole are currently approved to treat CD in acute and chronic phases. To minimize the danger of disease transmission and as a therapy, new compounds that are safer and more effective are required. It has been demonstrated that Amaryllidaceae plants suppress the growth of T. cruzi – the causative agent of CD. However, little research has been done on their potential protein targets in the parasite. In this study, an in-silico approach was used to investigate the interactions of the Amaryllidaceae alkaloids with trans-sialidase, a confirmed protein target of T. cruzi. The nature and efficiency of the main binding modes of the alkaloids were investigated by molecular docking. Trans-sialidase active site residues were bound by the alkaloids with binding energies varying from −8.9 to −6.9 kcal/mol. From the molecular docking investigation, all the alkaloids had strong interactions with the crucial amino acid residues (Glu230, Tyr342, and Asp59) required for trans-sialidase catalysis. Montanine was the most stable compound throughout the molecular dynamics simulation and had a favorable docking binding energy (−8.9 kcal/mol). The binding free energy (MM-GBSA) of the montanine complex was −14.6 kcal/mol. The pharmacokinetic properties investigated demonstrated that all the evaluated compounds exhibit suitable oral administration requirements. Overall, this in silico study suggests that the Amaryllidaceae alkaloids could potentially act as inhibitors of trans-sialidase. Communicated by Ramaswamy H. Sarma
On the Origin of Precipitation of Transition Metals Implanted in MgO
Creators: name: Misra, Debolina
name: Yadav, Satyesh K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Transition metals implanted in single crystal MgO can precipitate out at grain boundaries or remain embedded in bulk. Using first-principles calculations based on density functional theory we have calculated the thermodynamic stability and diffusion coefficients of the implanted ions to explain Fe and Ni precipitation in MgO. Experimentally it has been observed that some of the Fe atoms precipitate out, while few Fe atoms in 2+ and 3+ charge states remain embedded in the lattice. Our simulation shows that at 600 K (typical annealing temperature) while neutral iron in MgO would migrate 1 $μ$m in few microseconds, it takes several years for the charged Fe ions to migrate the same distance. On the other hand, Ni ions in all its charge states (neutral, 1+, 2+, and 3+) would migrate 1 $μ$m in just few microseconds, at 600 K. This explains the experimental observation that implanted Ni always precipitates out. Our study paves a way forward to predict if ions implanted in stable oxide will be stable or will precipitate out.
MOST Photometry of the roAp Star HD 134214
Creators: name: Cameron, C.
name: Matthews, J. M.
name: Rowe, J. F.
name: Kuschnig, R.
name: Guenther, D. B.
name: Moffat, A. F. J.
name: Rucinski, S. M.
name: Sasselov, D.
name: Walker, G. A. H.
name: Weiss, W. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present 10.27$ \rm{hrs}$ of photometry of the roAp star HD 134214 obtained by the MOST satellite. The star is shown to be monoperiodic and oscillating at a frequency of 2948.97$ \pm 0.55 μ\rm{Hz}$. This is consistent with earlier ground based photometric campaigns (e.g. Kreidl et al. 1994). We do not detect any of the additional frequencies identified in the recent spectroscopic study by Kurtz et al. (2006) down to an amplitude limit of 0.36$ \rm{mmag}$ ($2σ$ significance limit).
description: 9 pages, 3 figures, to appear in Communications in Asteroseismology v. 148
Short Bragg pulse spectroscopy for a paraxial fluids of light
Creators: name: Piekarski, Clara
name: Liu, Wei
name: Steinhauer, Jeff
name: Giacobino, Elisabeth
name: Bramati, Alberto
name: Glorieux, Quentin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We implement Bragg spectroscopy in a paraxial fluid of light. Analogues of short Bragg pulses are imprinted on a photon fluid by wavefront shaping using a spatial light modulator. We measure the dispersion relation and evidence a parabolic single-particle regime as well as a linear phonon regime even for very weakly interacting photons and low sound velocity. Finally, we report a measurement of the static structure factor, $S(k)$, and we demonstrate the presence of pair-correlated excitations, revealing indirectly the quantum depletion in a paraxial fluid of light.
Controllable spin transport in ferromagnetic graphene junctions
Creators: name: Yokoyama, Takehito
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study spin transport in normal/ferromagnetic/normal graphene junctions where a gate electrode is attached to the ferromagnetic graphene. We find that due to the exchange field of the ferromagnetic graphene, spin current through the junctions has an oscillatory behavior with respect to the chemical potential in the ferromagnetic graphene, which can be tuned by the gate voltage. Especially, we obtain a controllable spin current reversal by the gate voltage. Our prediction of high controllability of spin transport in ferromagnetic graphene junction may contribute to the development of the spintronics.
description: 4 pages, 4 figures, accepted for publication in Phys. Rev. B
Delineation of the CENP-LN sub-complex dissociation mechanism upon multisite phosphorylation during mitosis
Creators: name: Durojaye, Olanrewaju Ayodeji
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Molecular Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Developmental Biology

description: Phosphorylation is the most prevalent form of regulation in cells, organizing virtually all cellular functions, including survival, motility, differentiation, proliferation, and metabolism. This regulatory function has been largely conserved from the primitive single-cell to the more complex multicellular organisms. More than a third of proteins in eukaryotes are phosphorylated, and essentially every class of protein undergoes regulation by phosphorylation. A decline in the cellular level of CENP-L and CENP-N (components of the constitutive centromere associated network) has earlier been reported and linked to cyclin-dependent kinase (CDK) phosphorylation upon transition into mitosis. Given the importance of posttranslational modifications in cell cycle regulation, mechanistic comprehension of the impact of phosphorylation on both proteins (CENP-L and CENP-N) is of high significance. Through the application of diverse computational analytical techniques, including atomistic molecular dynamics simulations, the mechanism of kinetochore mis-localization and dissociation of the CENP-LN sub-complex in mitosis was delineated. We showed that the phosphorylation of both components of the sub-complex induces global conformational destabilizing effects on the proteins, combined with changes in the electrostatic potential and increase in steric clashes around the protein-protein interaction interface. This, consistent with earlier experimental reports, suggest that the multisite phosphorylation of the CENP-LN sub-complex plays a crucial role in the regulation of cell division. Communicated by Ramaswamy H. Sarma
Additional file 1 of A qualitative exploration of the impact of COVID-19 on food decisions of economically disadvantaged families in Northern Ireland
Creators: name: Spyreli, Eleni
name: McKinley, Michelle C.
name: Woodside, Jayne V.
name: Kelly, Colette
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1.
Experimental Investigations on the TMI Thresholds of Low-NA Yb-doped single mode fibers
Creators: name: Beier, Franz
name: Moeller, Friedrich
name: Sattler, Bettina
name: Nold, Johannes
name: Liem, Andreas
name: Hupel, Christian
name: Kuhn, Stefan
name: Hein, Sigrun
name: Haarlammert, Nicoletta
name: Schreiber, Thomas
name: Eberhardt, Ramona
name: Tuennermann, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this contribution we investigate the transversal mode instability behavior of an ytterbium doped commercial 20/400 fiber and obtain 2.9 kW of output power after optimizing the influencing parameters. In this context, we evaluate the influence of the bend diameter and the pump wavelength within the scope of the absorption length and the length of the fiber. Furthermore with a newly developed fiber we report on 4.4 kW of single-mode output power at 40 cm bend diameter.
Vanadium complex as a potential modulator of the autophagic mechanism through proteins PI3K and ULK1: development, validation and biological implications of a specific force field for [VO(bpy)2Cl]
Creators: name: Santos, Taináh M. R.
name: Tavares, Camila A.
name: da Cunha, Elaine F. F.
name: Ramalho, Teodorico C.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Microbiology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Plant Biology

description: The modulation of autophagy has been presented as a very useful strategy in anticancer treatments. In this sense, the vanadium complex (VC) bis(2,2'-bipyridine)chlorooxovanadium(IV), [VO(bpy)2Cl], is known for its ability to induce autophagy in triple-negative breast cancer cells (TNBC). An excellent resource to investigate the role of VC in the induction of autophagy is to make use of Molecular Dynamics (MD) simulations. However, until now, the scarcity of force field parameters for the VC prevented a reliable analysis. The autophagy signaling pathway starts with the PI3K protein and ends with ULK1. Therefore, in the first stage of this work, we developed a new AMBER force field for the VC (VCFF) from a quantum structure, obtained by DFT calculations. In the second stage, the VCFF was validated through structural analyses. From this, it was possible to investigate, through docking and MD (200 ns), the performance of the PI3K-VC and ULK1-VC systems (third stage). The analyses of this last stage involved RMSD, hydrogen bonds, RMSF and two pathways for the modulation of autophagy. In general, this work fills in the absence of force field parameters (FF) for VC by proposing an efficient and new FF, in addition to investigating, at the molecular level, how VC is able to induce autophagy in TNBC cells. This study encourages new parameterizations of metallic complexes and contributes to the understanding of the duality of autophagic processes. Communicated by Ramaswamy H. Sarma
REEEM-D2.2b_Innovation Readiness Level Report - Renewable Energy Technologies - Analysis of wind, solar and ocean power
Creators: name: REEEM Project
Publisher: name: Zenodo
Year: 2019

description: In the framework of REEEM project, three innovation readiness level reports will be developed on three different energy technology groups. The second report, presented in this document, is dedicated to renewable energy technologies. Five renewable energy technologies are selected and studied in this report, namely onshore and offshore wind, solar PV, tidal and wave. The technologies are from different sources of renewable energy and with different maturity status in order to provide a wider picture of the existing renewable technologies in the market. This report will be complemented by the REEEM Technology and Innovation roadmap on renewable energy integration.
Grammatical elicitation: Adpositions and complementation
Creators: name: Gómez, María
name: Bossi, Madeline
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: gug

description: Various compound adpositions, adpositions with pronominal complements, and questions with adpositions. Elicitation of different complement-taking verbs with various subjects in matrix and embedded clauses. Some elicitation of raising with 'seem.'
Scientific production on mobile information literacy in higher education: A bibliometric analysis (2006-2017)
Creators: name: Información, conocimiento y sociedad, Grupo de investigación
name: Pinto, María
name: Fernández Pascual, Rosaura
name: Caballero Mariscal, David
name: Sales, Dora
name: Guerrero, David
name: Uribe Tirado, Alejandro
Publisher: name: figshare
Year: 2021
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences

description: ABSTRACT: This paper offers a bibliometric analysis of the scientific production on Mobile Information Literacy (m-IL) in Higher Education published between 2006 and 2017, taking into account papers covered by Web of Science (WoS), Scopus, Library and Information Science Abstracts (LISA), Library and Information Science and Technology Abstract (LISTA), and Education Resources Information Center (ERIC). Bibliometrics, as an integral part of research evaluation methodology, helps us to identify the subject’s evolution over the period studied. In this research we aim to: a) identify the most relevant journals that publish literature in this field, b) calculate the authors’ average productivity and identify the most productive authors, and c) discover the most significant trends in this academic field, through statistical and co-occurrence word analyses of the titles and the keywords used to index papers. The bibliometric results of this research provide a snapshot of the literature on Mobile Information Literacy that highlights the most relevant journals, authors, and trending keywords.
Helicity Spectra and Dissipation
Creators: name: Chkhetiani, O. G.
name: Golbraikh, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Both dissipation of helicity and it spectrum we are study on the basis of asymptotic model. Introduction into model dependence of angle between turbulent components vorticity and velocity on the governing parameters leads to the spectra of helicity observed experimentally and obtained by DNS model computations by various authors. At the same time, it settles the problem of helicity dissipation divergence with growing Reynolds number.
Conditional Automated Channel Pruning for Deep Neural Networks
Creators: name: Liu, Yixin
name: Guo, Yong
name: Liu, Zichang
name: Liu, Haohua
name: Zhang, Jingjie
name: Chen, Zejun
name: Liu, Jing
name: Chen, Jian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Model compression aims to reduce the redundancy of deep networks to obtain compact models. Recently, channel pruning has become one of the predominant compression methods to deploy deep models on resource-constrained devices. Most channel pruning methods often use a fixed compression rate for all the layers of the model, which, however, may not be optimal. To address this issue, given a target compression rate for the whole model, one can search for the optimal compression rate for each layer. Nevertheless, these methods perform channel pruning for a specific target compression rate. When we consider multiple compression rates, they have to repeat the channel pruning process multiple times, which is very inefficient yet unnecessary. To address this issue, we propose a Conditional Automated Channel Pruning(CACP) method to obtain the compressed models with different compression rates through single channel pruning process. To this end, we develop a conditional model that takes an arbitrary compression rate as input and outputs the corresponding compressed model. In the experiments, the resultant models with different compression rates consistently outperform the models compressed by existing methods with a channel pruning process for each target compression rate.
Pharmacological evaluations of amide carboxylates as potential anti-Alzheimer agents: anti-radicals, enzyme inhibition, simulation and behavioral studies in animal models
Creators: name: Mahnashi, Mater H.
name: Ali, Saqib
name: Alshehri, Osama M.
name: Almazni, Ibrahim Abdullah
name: Asiri, Saeed Ahmed
name: Sadiq, Abdul
name: Zafar, Rehman
name: Jan, Muhammad Saeed
Publisher: name: Taylor & Francis
Year: 2023
Subjects: Biochemistry
Medicine
Cell Biology
Neuroscience
Pharmacology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified

description: Alzheimer’s disease (AD) is a neurological disorder that progresses gradually but irreversibly leading to dementia and is difficult to prevent and treat. There is a considerable time window in which the progression of the disease can be intervened. Scientific advances were required to help the researchers to identify the effective methods for the prevention and treatment of disease. This research was designed to investigate potential mediators for the remedy of AD, five new carboxylate amide zinc complexes (AAZ9–AAZ13) were synthesized and characterized by spectroscopic and physicochemical techniques. The biological evaluation was carried out based on the cholinesterase inhibitory mechanism. The preparation methodology provided the effective synthesis of targeted moieties. The in vitro pharmacological activities were evaluated involving AChE/BChE inhibition and antioxidant potential. All synthesized compounds displayed activity against both enzymes in higher or comparable to the standard drug Galantamine, a reversible inhibitor but the results displayed by compound AAZ10 indicated IC50 of 0.0013 µM (AChE) and 0.061 µM (BChE) as high values for dual AChE/BChE inhibition with potent anti-oxidant results. Structure activity relationship (SAR) indicated that the potent activity of compound AAZ10 appeared due to the presence of nitro clusters at the ortho position of an aromatic ring. The potent synthesized compound AAZ10 was also explored for the in-vivo Anti-Alzheimer activity and anti-oxidant activity. Binding approaches of all synthesized compounds were revealed through molecular docking studies concerning binding pockets of enzymes that analyzed the best posture interaction with amino acid (AA) residues providing an appreciable understanding of enzyme inhibitory mechanisms. Results indicate that synthesized zinc (II) amide carboxylates can behave as an effective remedy in the treatment of Alzheimer’s disease. Communicated by Ramaswamy H. Sarma
Nondestructive Prediction of the Buckling Load of Imperfect Shells
Creators: name: Abramian, Anais
name: Virot, Emmanuel
name: Lozano, Emilio
name: Rubinstein, Shmuel M.
name: Schneider, Tobias M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: From soda cans to space rockets, thin-walled cylindrical shells are abundant, offering exceptional load carrying capacity at relatively low weight. However, the actual load at which any shell buckles and collapses is very sensitive to imperceptible defects and can not be predicted, which challenges the reliable design of such structures. Consequently, probabilistic descriptions in terms of empirical design rules are used and reliable design requires to be very conservative. We introduce a nonlinear description where finite-amplitude perturbations trigger buckling. Drawing from the analogy between imperfect shells which buckle and imperfect pipe flow which becomes turbulent, we experimentally show that lateral probing of cylindrical shells reveals their strength non-destructively. A new ridge-tracking method is applied to commercial cylinders with a hole showing that when the location where buckling is nucleated is known we can accurately predict the buckling load of each individual shell, within $\pm 5\%$. Our study provides a new promising framework to understand shell buckling, and more generally, imperfection-sensitive instabilities.
title: Essays on the impact of capital regulation on financial institutions
Creators: name: Sen, Ishita
Publisher: name: London Business School
Year: 2019

description: This dissertation contains three papers that study the impact of capital regulation on the behavior of financial institutions. The first chapter is my job market paper titled “Regulatory Limits to Risk Management”, in which I study the impact of inconsistencies in regulation on the risk management choices of US life insurance companies. Using comprehensive position level data on derivative instruments, I show that regulation limits the hedging choices of life insurers, results in lower hedging, and leads to greater transfers of risk exposures to off-balance sheet entities. My findings have implications for the fragility of life insurers going forward as regulation interacts with monetary policy in a way that shuts down the incentives for risk management when interest rates rise. My job market paper received the AQR Asset Management Institute Fellowship Award in 2018 and the Macro Financial Modeling Dissertation Fellowship from the Becker Friedman Institute in 2017 and 2018. The second chapter titled “Capital Regulation and Product Market Outcomes” (joint work with David Humphry) was presented at the American Finance Association (AFA) in 2016. We study the impact of the largest ever shift in capital requirements in a developed insurance market, using proprietary data from the Bank of England, and show economically large effects on the market for investment and protection products in the UK that potentially has welfare implications for consumers. The third chapter titled “Demand for Illiquid Assets” is joint work with Varun Sharma. Using corporate bond holdings of life insurers, we micro-found a new channel for the demand of illiquid assets that is due to the discretion institutions have to value such assets to relax balance sheet constraints in bad times. Our findings have implications for the ex-ante portfolio choice of insurance companies, which impacts the holding structure and price discovery of a segment of the corporate bond market. More broadly, my dissertation helps to better understand the objective function and preferences of financial institutions and their impact on economic outcomes.
A Positive-Definite Scalar Product for Free Proca Particle
Creators: name: Jakubsky, V.
name: Smejkal, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We implement recent results of pseudo-Hermitian quantum mechanics to description of relativistic massive particle with spin-one. We derive a one-parameter family of Lorentz invariant positive-definite scalar products on the space of solutions of Proca equation.
description: 13 pages, no figures
Selective testing and its effect on false discovery rate controlling procedures under discrete framework
Creators: name: Biswas, Aniket
name: Sinha, Abhik
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Biological Sciences not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: The support of the p-value corresponding to a discrete test-statistic is a finite isolated subset of the unit interval. In differential gene expression studies with RNA-sequence datasets, multiple discrete tests are performed. The objective of such studies are to identify differentially expressed genes with a control over a measure of false discoveries. We suggest to remove hypotheses corresponding to the p-values having minimum support-point greater than the threshold of that overall measure. We argue this suggestion and present methods of filtering the set of hypotheses for two useful testing scenarios. Simulation experiments show gain in power of the multiple testing procedures when applied to the filtered set of hypotheses. We also demonstrate the method with two real datasets, related to the study of HIV and mammary gland.
Reissner-Nordström perturbation framework with gravitational wave applications
Creators: name: Burton, Justin Y. J.
name: Osburn, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a new convenient framework for modeling Reissner-Nordström black hole perturbations from charged distributions of matter. Using this framework, we quantify how gravitational wave observations of compact binary systems would be affected if one or both components were charged. Our approach streamlines the (linearized) Einstein-Maxwell equations through convenient master functions that we designed to ameliorate certain disadvantages of prior strategies. By solving our improved master equations with a point source, we are able to quantify the rate of orbital energy dissipation via electromagnetic and gravitational radiation. Through adiabatic and quasicircular approximations, we apply our dissipative calculations to determine trajectories for intermediate and extreme mass-ratio inspirals. By comparing trajectories and waveforms with varied charges to those with neutral components, we explore the potential effect of electric charge on gravitational wave signals. We observe that the case of opposite charge-to-mass ratios has the most dramatic impact. Our findings are largely interpreted through the lens of the upcoming LISA mission.
description: Accepted for publication by Physical Review D
Einstein-Yang-Mills black hole solution in higher dimensions by the Wu-Yang Ansatz
Creators: name: Mazharimousavi, S. Habib
name: Halilsoy, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: By employing the higher dimensional version of the Wu-Yang Ansatz we obtain black hole solutions in the spherically symmetric Einstein-Yang-Mills (EYM) theory. Although these solutions were found recently by other means, our method provides an alternative way in which one identifies the contribution from the Yang-Mills (YM) charge. Our method has the advantage to be carried out analytically as well. We discuss some interesting features of the black hole solutions obtained.
description: 10 pages, 5 figures
Libros y ruralidad: geografías andinas de la Red de Bibliotecas Rurales de Cajamarca, Perú
Creators: name: Información, conocimiento y sociedad, Grupo de investigación
name: Quintero Castro, Nathalia
name: Mendezàbal Riera, Enric
Publisher: name: figshare
Year: 2021
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences

description: RESUMEN: La Red de Bibliotecas Rurales de Cajamarca es una organización sin ánimo de lucro conformada por las familias comuneras del territorio de Cajamarca, en la sierra norte del Perú, que con los libros en el campo han logrado afianzar y extender la tradición oral cajamarquina, la forma de vida andina y la dignidad de los pueblos chacareros y criadores. Se presentan avances del estudio de caso de la Red de Bibliotecas Rurales de Cajamarca en el Perú, con los que se pretenden reconocer las interrelaciones de la concepción, los actores, los lugares y las acciones de esta institución socio-cultural. En primera instancia, una introducción para exponer los elementos generales del proyecto de investigación. Segundo, algunos elementos metodológicos. Tercero, las características que hacen de la propuesta una red humana, geográfica y natural; quién lee, escribe y conversa; con qué: los libros y sus características; se finaliza con un aparte de discusión y conclusiones. ABSTRACT: The Network of Rural Libraries of Cajamarca is a nonprofit organization made up of community families from the territory of Cajamarca, in the northern highlands of Peru who, with books in the field, have managed to consolidate and extend the oral tradition of Cajamarca, the form of Andean life and the dignity of the farming villages and breeders. The case study of the Network of Rural Libraries of Cajamarca in Peru is presented, it recognizes the interrelationships of the conception, the actors, the places and the actions of this socio-cultural institution. First, an introduction to expose the general elements of the research project. Second, some methodological elements. Third, the characteristics that make the proposal a human, geographical and natural network; who reads, writes and talks; with what: The books and their characteristics; it ends with the apart of the discussion and conclusions.
The Sloan Lens ACS Survey. VI: Discovery and analysis of a double Einstein ring
Creators: name: Gavazzi, Raphael
name: Treu, Tommaso
name: Koopmans, Leon V. E.
name: Bolton, Adam S.
name: Moustakas, Leonidas A.
name: Burles, Scott
name: Marshall, Philip J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of two concentric Einstein rings around the gravitational lens SDSSJ0946+1006, as part of the Sloan Lens ACS Survey. The main lens is at redshift zl=0.222, while the inner ring (1) is at zs1=0.609 and Einstein radius $Re_1=1.43\pm0.01"$. The wider image separation ($Re_2=2.07\pm 0.02"$) of the outer ring (2) implies that it is at higher redshift. Its detection in the F814W filter implies zs2<6.9. The configuration can be well described by a total density profile $ρ_{tot} ~ r^-g'$ with $g'=2.00\pm0.03$ and velocity dispersion $σ_{SIE}=287\pm5\kms$. [...] We consider whether this configuration can be used to constrain cosmological parameters exploiting angular distance ratios entering the lens equations. Constraints for SDSSJ0946+1006, are uninteresting due to the sub-optimal lens and source redshifts. We then consider the perturbing effect of the mass associated with Ring 1 building a double lens plane compound lens model. This introduces minor changes to the mass of the main lens and allows to estimate the mass of Ring 1 $(σ_{SIE,s1}=94\pm30\kms)$. We examine the prospects of doing cosmography with a sample of 50 double lenses, expected from future space based surveys such as DUNE or JDEM. Taking full account of the model uncertainties, such a sample could be used to measure $Ω_m$ and $w$ with 10% accuracy, for a flat cosmology.
Simulations of neutrino and gamma-ray production from relativistic black-hole microquasar jets
Creators: name: Papavasileiou, Th. V.
name: Kosmas, O. T.
name: Sinatkas, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Recently, microquasar jets have aroused the interest of many researchers focusing on the astrophysical plasma outflows and various jet ejections. In this work, we concentrate on the investigation of electromagnetic radiation and particle emissions from the jets of stellar black hole binary systems characterized by their hadronic content in their jets. Such emissions are reliably described within the context of the relativistic magneto-hydrodynamics. Our model calculations are based on the Fermi acceleration mechanism through which the primary particles (mainly protons) of the jet are accelerated. As a result, a small portion of thermal protons of the jet acquire relativistic energies, through shock-waves generated into the jet plasma. From the inelastic collisions of fast (non-thermal) protons with the thermal (cold) ones, secondary charged and neutral particles (pions, kaons, muons, $η$-particles, etc.) are created as well as electromagnetic radiation from the radio wavelength band, to X-rays and even to very high energy $γ$-ray emission. One of our main goals is, through the appropriate solution of the transport equation and taking into account the various mechanisms that cause energy losses to the particles, to study the secondary particle distributions within hadronic astrophysical jets. After testing our method on the Galactic MQs SS 433 and Cyg X-1, as a concrete extragalactic binary system, we examine the LMC X-1 located in the Large Magellanic Cloud, a satellite galaxy of our Milky Way Galaxy. It is worth mentioning that, for the companion O star (and its extended nebula structure) of the LMC X-1 system, new observations using spectroscopic data from VLT/UVES have been published few years ago.
description: 10 pages, 4 figures, 15 graphs