cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The network of stabilizing contacts in proteins studied by coevolutionary data
Creators: name: Lui, Sara
name: Tiana, Guido
Publisher: name: arXiv
Year: 2013
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: The primary structure of proteins, that is their sequence, represents one of the most abundant set of experimental data concerning biomolecules. The study of correlations in families of co--evolving proteins by means of an inverse Ising--model approach allows to obtain information on their native conformation. Following up on a recent development along this line, we optimize the algorithm to calculate effective energies between the residues, validating the approach both back-calculating interaction energies in a model system, and predicting the free energies associated to mutations in real systems. Making use of these effective energies, we study the networks of interactions which stabilizes the native conformation of some well--studied proteins, showing that it display different properties than the associated contact network.
High-brightness seven-octave carrier envelope phase-stable light source
Creators: name: Elu, Ugaitz
name: Maidment, Luke
name: Vamos, Lenard
name: Tani, Francesco
name: Novoa, David
name: Frosz, Michael H.
name: Badikov, Valeriy
name: Badikov, Dmitrii
name: Petrov, Valentin
name: Russell, Philip St. J.
name: Biegert, Jens
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: High-brightness sources of coherent and few-cycle-duration light waveforms with spectral coverage from the UV to the THz would offer unprecedented versatility and opportunities for a spectacular range of applications from bio-chemical sensing, to time-resolved and nonlinear spectroscopy, to attosecond light-wave electronics. Combinations of various sources with frequency conversion and supercontinuum generation can provide relatively large spectral coverage, but many applications require much broader spectral range and low-jitter synchronization for time-domain measurements. Here, we present a carrier-envelope-phase stable light source, seeded by a mid-IR frequency comb, with simultaneous spectral coverage across 7 optical octaves, from the UV (340 nm) into the THz (40,000 nm). Combining soliton self-compression and dispersive wave generation in an anti-resonant-reflection photonic crystal fibre with intra-pulse difference frequency generation in BaGa2GeSe6, the spectral brightness is 2-5 orders of magnitude above synchrotron sources. This enables high-dynamic-range spectroscopies and provides enticing prospects for attosecond physics and material sciences.
description: 4 figures
Prescribing Gaussian curvature on surfaces with conical singularities and geodesic boundary
Creators: name: Battaglia, Luca
name: Jevnikar, Aleks
name: Wang, Zhi-An
name: Yang, Wen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 35J20, 58J32

description: We study conformal metrics with prescribed Gaussian curvature on surfaces with conical singularities and geodesic boundary in supercritical regimes. Exploiting a variational argument, we derive a general existence result for surfaces with at least two boundary components. This seems to be the first result in this setting. Moreover, we allow to have conical singularities with both positive and negative orders, that is cone angles both less and grater than $2π$.
High-NA Confocal Measurement by Diffractive Optical Elements
Creators: name: Li, Zheng
Publisher: name: Karlsruhe
Year: 2020

description: Diffractive optical elements (DOEs) can produce high-numerical-aperture (NA) spots over a large field. They can be combined with a low-NA objective to measure a large area with high resolution. This work shows experiments of using DOEs in reflection confocal microscope to resolve small structures beyond the capability of the objective. Both qualitative and quantitative results have shown enhancement in lateral and axial resolution by the application of the DOEs, which also agrees to the imaging theory of confocal microscopes.
The X-ray/UV absorber in NGC 4593
Creators: name: Ebrero, J.
name: Kaastra, J. S.
name: Kriss, G. A.
name: de Vries, C. P.
name: Costantini, E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the results of a recent (March 2011) 160 ks Chandra-LETGS observation of the Seyfert galaxy NGC 4593, and the analysis of archival X-ray and UV spectra taken with XMM-Newton and HST/STIS in 2002. We find evidence of a multi-component warm absorber (WA) in the X-rays with four distinct ionisation degrees (log xi = 1.0, log xi = 1.7, log xi = 2.4, and log xi = 3.0) outflowing at several hundreds of km/s. In the UV we detect 15 kinematic components in the absorbers, blueshifted with respect to the systemic velocity of the source, ranging from -60 km/s to -1520 km/s. Although the predicted CIV and NV column densities from the low-ionisation X-ray outflow are in agreement with those measured for some components in the STIS spectrum, there are kinematic discrepancies that may prevent both the X-ray and UV absorbers from originating in the same intervening gas. We derive upper limits on the location of the absorbers finding that the high-ionisation gas lie within ~6 - 29 pc from the central ionising source, while the low-ionisation gas is located at several hundreds of pc. This is consistent with our line of sight passing through different parts of a stratified wind. The total kinetic energy of the outflows injected into the surroundings of the host galaxy only accounts for a tiny fraction of the bolometric luminosity of the source, and it is therefore unlikely that they may cause a significant impact in the interstellar medium of NGC 4593 in a given single episode of activity.
description: 17 pages, 11 figures, 9 tables. Accepted for publication in MNRAS
DORIVOR BO'YIMODARON(ACHILLEA MILLEFOLIUM L.) O'SIMLIGINING TARKIBI VATARQALISHI
Creators: name: Yalgasheva, Baxtigul
Publisher: name: Zenodo
Year: 2023

description: Dorivor o'simliklarni yetishtirish va qayta ishlash,   ularning urug'chiligini  yo'lga qo'yishni  rivojlantirish  bo'yicha ilmiy tadqiqotlar  ko'lamini  kengaytirishga  oid chora-tadbirlari to'g'risidagi  qonunga muvofiq ishlarni amalga oshirish.
Pair Production in Rotating Electric Fields
Creators: name: Blinne, Alexander
name: Gies, Holger
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore Schwinger pair production in rotating time-dependent electric fields using the real-time DHW formalism. We determine the time evolution of the Wigner function as well as asymptotic particle distributions neglecting back-reactions on the electric field. Whereas qualitative features can be understood in terms of effective Keldysh parameters, the field rotation leaves characteristic imprints in the momentum distribution that can be interpreted in terms of interference and multiphoton effects. These phenomena may seed characteristic features of QED cascades created in the antinodes of a high-intensity standing wave laser field.
description: 12 pages, 11 figures
Hadron Spectroscopy and Dynamics from Light-Front Holography and Conformal Symmetry
Creators: name: de Teramond, Guy F.
name: Brodsky, Stanley J.
name: Dosch, Hans Günter
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: To a first semiclassical approximation one can reduce the multi-parton light-front problem in QCD to an effective one-dimensional quantum field theory, which encodes the fundamental conformal symmetry of the classical QCD Lagrangian. This procedure leads to a relativistic light-front wave equation for arbitrary spin which incorporates essential spectroscopic and non-perturbative dynamical features of hadron physics. The mass scale for confinement and higher dimensional holographic mapping to AdS space are also emergent properties of this framework.
description: 11 pages, 6 figures. Invited plenary talk, presented by GdT at the 13th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2013), Rome, September 30 - October 4, 2013
Disentangling the drivers of reduced long-distance seed dispersal by birds in an experimentally fragmented landscape
Creators: name: Uriarte, Maria
name: Anciães, Marina
name: Da Silva, Mariana T.B.
name: Rubim, Paulo
name: Johnson, Erik
name: Bruna, Emilio M.
Publisher: name: Columbia University
Year: 2011
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Botany

description: Seed dispersal is a crucial component of plant population dynamics. Human landscape modifications, such as habitat destruction and fragmentation, can alter the abundance of fruiting plants and animal dispersers, foraging rates, vector movement, and the composition of the disperser community, all of which can singly or in concert affect seed dispersal. Here, we quantify and tease apart the effects of landscape configuration, namely, fragmentation of primary forest and the composition of the surrounding forest matrix, on individual components of seed dispersal of Heliconia acuminata, an Amazonian understory herb. First we identified the effects of landscape configuration on the abundance of fruiting plants and six bird disperser species. Although highly variable in space and time, densities of fruiting plants were similar in continuous forest and fragments. However, the two largest-bodied avian dispersers were less common or absent in small fragments. Second, we determined whether fragmentation affected foraging rates. Fruit removal rates were similar and very high across the landscape, suggesting that Heliconia fruits are a key resource for small frugivores in this landscape. Third, we used radiotelemetry and statistical models to quantify how landscape configuration influences vector movement patterns. Bird dispersers flew farther and faster, and perched longer in primary relative to secondary forests. One species also altered its movement direction in response to habitat boundaries between primary and secondary forests. Finally, we parameterized a simulation model linking data on fruit density and disperser abundance and behavior with empirical estimates of seed retention times to generate seed dispersal patterns in two hypothetical landscapes. Despite clear changes in bird movement in response to landscape configuration, our simulations demonstrate that these differences had negligible effects on dispersal distances. However, small fragments had reduced densities of Turdus albicollis, the largest-bodied disperser and the only one to both regurgitate and defecate seeds. This change in Turdus abundance acted together with lower numbers of fruiting plants in small fragments to decrease the probability of long-distance dispersal events from small patches. These findings emphasize the importance of foraging style for seed dispersal and highlight the primacy of habitat size relative to spatial configuration in preserving biotic interactions.
Theory of competing Chern-Simons orders and emergent phase transitions
Creators: name: Wang, Rui
name: Xie, Z. Y.
name: Wang, Baigeng
name: Sedrakyan, Tigran
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Based on the Chern-Simons fermionization of spin-1/2 operators, we propose a systematic framework to investigate the competition between emergent phases in frustrated two-dimensional XY quantum magnets. Application of the method to the antiferromagnetic honeycomb spin-1/2 $J_1$-$J_2$ XY model reveals an unconventional phase transition between two Chern-Simons orders: the Chern-Simons superconductor and the exciton insulator of Chern-Simons fermions. We show that in the spin language, this transition translates to the transition from the planar Néel state to the non-uniform chiral spin-liquid that was proposed earlier in the literature. Namely, the Chern-Simons superconductor describes the planar Néel state, while the Chern-Simons exciton insulator corresponds to the non-uniform chiral spin-liquid. These results are further confirmed by our high-precision tensor network calculation, which provides the first numerical evidence for the transition from Néel order to a non-uniform chiral spin-liquid. We argue that the developed method can be applied to other frustrated quantum magnets of XXZ type and can detect unconventional phase transitions.
description: 15 pages, 8 figures, supplemental material included
Customer Price Sensitivities in Competitive Automobile Insurance Markets
Creators: name: Verschuren, Robert Matthijs
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applications (stat.AP)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Insurers are increasingly adopting more demand-based strategies to incorporate the indirect effect of premium changes on their policyholders' willingness to stay. However, since in practice both insurers' renewal premia and customers' responses to these premia typically depend on the customer's level of risk, it remains challenging in these strategies to determine how to properly control for this confounding. We therefore consider a causal inference approach in this paper to account for customers' price sensitivity and to deduce optimal, multi-period profit maximizing premium renewal offers. More specifically, we extend the discrete treatment framework of Guelman and Guillén (2014) by Extreme Gradient Boosting, or XGBoost, and by multiple imputation to better account for the uncertainty in the counterfactual responses. We additionally introduce the continuous treatment framework with XGBoost to the insurance literature to allow identification of the exact optimal renewal offers and account for any competition in the market by including competitor offers. The application of the two treatment frameworks to a Dutch automobile insurance portfolio suggests that a policy's competitiveness in the market is crucial for a customer's price sensitivity and that XGBoost is more appropriate to describe this than the traditional logistic regression. Moreover, an efficient frontier of both frameworks indicates that substantially more profit can be gained on the portfolio than realized, also already with less churn and in particular if we allow for continuous rate changes. A multi-period renewal optimization confirms these findings and demonstrates that the competitiveness enables temporal feedback of previous rate changes on future demand.
Accurate potential energy, dipole moment curves, and lifetimes of vibrational states of heteronuclear alkali dimers
Creators: name: Fedorov, Dmitry A.
name: Derevianko, Andrei
name: Varganov, Sergey A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We calculate the potential energy curves, the permanent dipole moment curves, and the lifetimes of the ground and excited vibrational states of the heteronuclear alkali dimers XY (X, Y = Li, Na, K, Rb, Cs) in the X1Σ+ electronic state using the coupled cluster with singles doubles and triples (CCSDT) method. All-electron quadruple-ζ basis sets with additional core functions are used for Li and Na, and small-core relativistic effective core potentials with quadruple-ζ quality basis sets are used for K, Rb and Cs. The inclusion of the coupled cluster non-perturbative triple excitations is shown to be crucial for obtaining the accurate potential energy curves. Large one-electron basis set with additional core functions is needed for the accurate prediction of permanent dipole moments. The dissociation energies are overestimated by only 14 cm-1 for LiNa and by no more than 114 cm-1 for the other molecules. The discrepancies between the experimental and calculated harmonic vibrational frequencies are less than 1.7 cm-1, and the discrepancies for the anharmonic correction are less than 0.1 cm-1. We show that correlation between atomic electronegativity differences and permanent dipole moment of heteronuclear alkali dimers is not perfect. To obtain the vibrational energies and wave functions the vibrational Schrödinger equation is solved with the B-spline basis set method. The transition dipole moments between all vibrational states, the Einstein coefficients and the lifetimes of the vibrational states are calculated. We analyze the decay rates of the vibrational states in terms of spontaneous emission, and stimulated emission and absorption induced by black body radiation. In all studied heteronuclear alkali dimers the ground vibrational states have much longer lifetimes than any excited states.
El Cajón al muerto en Matanzas: configuración ritual festiva del complejo religioso Ocha-Ifá
Creators: name: Balbuena Gutiérrez, Bárbara
Publisher: name: Comparative Cultural Studies - European and Latin American Perspectives
Year: 2020

description: The dead drawer is one of the festive ritual configurations that is often made, as part of the new traditions incorporated into Ocha’s religious practices. This is a key example to demonstrate the processes of cultural hybridization to which the cult has been subjected and where both religious components of the Espiritismo and the Regla de Palo in Cuba, as well as representative secular expressions of the cultural heritage of the nation, such is the case of the Rumba. The fundamental objective of the study is to assess the importance that this holiday has taken on as a way of paying tribute to the dead or eggun and in fulfillment of the maxim “Ikú logbi Ocha” (the dead gave birth to the saint). It is built an analysis of this celebration dedicated to the undivinized ancestors of the Regla de Ocha, taking into account the origin, its motivations, the ritual configuration and the musical-dance expressions involved. The symbolic meaning of each of the actions performed in this festive ceremony is also considered.
description: Comparative Cultural Studies - European and Latin American Perspectives, Vol. 5 No. 9 (2020)
Prediction of low-keV monochromatic images from polyenergetic CT scans for improved automatic detection of pulmonary embolism
Creators: name: Seibold, Constantin
name: Fink, Matthias A.
name: Goos, Charlotte
name: Kauczor, Hans-Ulrich
name: Schlemmer, Heinz-Peter
name: Stiefelhagen, Rainer
name: Kleesiek, Jens
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: 92C55 68T07

description: Detector-based spectral computed tomography is a recent dual-energy CT (DECT) technology that offers the possibility of obtaining spectral information. From this spectral data, different types of images can be derived, amongst others virtual monoenergetic (monoE) images. MonoE images potentially exhibit decreased artifacts, improve contrast, and overall contain lower noise values, making them ideal candidates for better delineation and thus improved diagnostic accuracy of vascular abnormalities. In this paper, we are training convolutional neural networks~(CNN) that can emulate the generation of monoE images from conventional single energy CT acquisitions. For this task, we investigate several commonly used image-translation methods. We demonstrate that these methods while creating visually similar outputs, lead to a poorer performance when used for automatic classification of pulmonary embolism (PE). We expand on these methods through the use of a multi-task optimization approach, under which the networks achieve improved classification as well as generation results, as reflected by PSNR and SSIM scores. Further, evaluating our proposed framework on a subset of the RSNA-PE challenge data set shows that we are able to improve the Area under the Receiver Operating Characteristic curve (AuROC) in comparison to a naïve classification approach from 0.8142 to 0.8420.
description: 4 pages, ISBI 2021
Heavy-ion Collisions: Direct and indirect probes of the density and temperature dependence of Esym
Creators: name: Kohley, Z.
name: Yennello, S. J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Heavy-ion collisions provide a versatile terrestrial probe of the nuclear equation of state through the formation of nuclear matter at a wide variety of temperatures, densities, and pressures. Direct and indirect approaches for constraining the density dependence of the symmetry energy using heavy-ion collisions have been developed. The direct approach relies on scaling methods which attempt to connect isotopic fragment distributions to the symmetry energy. Using the indirect approach constraints on the equation of state are extracted from comparison of experimental results and theoretical transport calculations which utilize effective nucleon-nucleon interactions. Besides exploring the density dependence of the equation of state, heavy-ion collisions are simultaneously probing different temperature gradients of nuclear matter allowing for the temperature dependence of the symmetry energy to be examined. The current progress and open questions related to constraining the density and temperature dependence of the symmetry energy with heavy-ion collisions are discussed in the review.
description: Review to appear in the upcoming EPJA special volume on nuclear symmetry energy
La racialidad en la música: De Nicolás Guillén al rap y a Tony Ávila
Creators: name: Burunate Sánchez, Teresa Victoria
Publisher: name: Comparative Cultural Studies - European and Latin American Perspectives
Year: 2020

description: The acknowledge of existence of racial discriminatory manifestations in Cuban society nowadays beside the declaration of the United Nations declaration of the decade of afro descendants in 2015 create the proper framework for developing any investigation related with racial topic. That’s why the goal of the present paper is to reveal how racial problem has been developed in Cuban music through the lyric of Nicolas Guillen’s poems Motivos de Son, the Cuban rap ¿Quién tiro la tiza? And Cientificamente Negro of Tony Avila. Originally Guillen’s poems were not conceived to be used by any musician. Nevertheless, outstanding musicians took them inspired by poems’ metric, rhythm and their poetic structure. Indeed, author main purpose was that negro people recognize and assume himself as such; the theme of the rap is a critical answer to the rebirth of hidden form of racial discrimination that emerged due to the economical social changes resulting from economical political situation while in Tony Avila’s work the negro not only conscientious assume himself as such, at the same time censure the persistence of stereotypes and exclusion racial manifestation.
description: Comparative Cultural Studies - European and Latin American Perspectives, Vol. 5 No. 9 (2020)
Adab as Literary Form and Social Conduct: Reading the Gulistan in Late Mughal India
Creators: name: Kia, Mana
Publisher: name: Columbia University
Year: 2014
Subjects: Indians
Persian literature
Persian language--Study and teaching

description: This essay examines the role and meaning of Shaykh Mushrif al-Dīn “Saʻdī” Shīrāzī’s Gulistān in late Mughal India. As the prose primer for a Persian education, the Gulistān encompassed the double meaning of adab, as exemplar both of literary form and of proper conduct. I explore instances in which the original text is cited in the work of Sirāj al-Din ʻAli Khān Ārzū (1689-1756 CE), a scholar and poet, who also wrote a commentary on the text. I then explore the larger context of Ārzū’s life and work in the context of mid- eighteenth-century Delhi, to situate the stakes of social and literary adab in a time of political fragmentation and social upheaval. Patronized by high-ranking Mughal officials, Ārzū was engaged in a larger project of recouping the cultural prestige of the imperial capital as political power devolved to regional centers in the face of factional politics and external invasion. Such an analysis seeks to historicize particular readings of classical texts of Persianate education.
Juan Formell, cronista del ingenio popular del cubano
Creators: name: Borges Bartutis, María Vicenta
Publisher: name: Comparative Cultural Studies - European and Latin American Perspectives
Year: 2020

description: The objective of this work is to pay tribute to the chronicler of the popular ingenuity of my beautiful Cuba, Juan Formell, one of the great and distinguished of Cuban popular music, the eternal conductor of the “Los Van Van” orchestra. In addition, it is intended to highlight the value of the lyrics of his compositions for the teaching and learning process of Spanish as a second language and culture; Today, through his songs, the amulet of Cuban popular music recreates experiences of different moments of the daily reality of the people. Serve this article as a tribute to this humble musician who gave the Cuban joy, rhythm, wisdom, spirituality and above all respect for identity.
description: Comparative Cultural Studies - European and Latin American Perspectives, Vol. 5 No. 9 (2020)
Anti-concentration of random variables from zero-free regions
Creators: name: Michelen, Marcus
name: Sahasrabudhe, Julian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: This paper provides a connection between the concentration of a random variable and the distribution of the roots of its probability generating function. Let $X$ be a random variable taking values in $\{0,\ldots,n\}$ with $\mathbb{P}(X = 0)\mathbb{P}(X = n) > 0$ and with probability generating function $f_X$. We show that if all of the zeros $ζ$ of $f_X$ satisfy $|\arg(ζ)| \geq δ$ and $R^{-1} \leq |ζ| \leq R$ then \[ \operatorname{Var}(X) \geq c R^{-2π/δ}n, \] where $c > 0$ is a absolute constant. We show that this result is sharp, up to the factor $2$ in the exponent of $R$. As a consequence, we are able to deduce a Littlewood--Offord type theorem for random variables that are not necessarily sums of i.i.d.\ random variables.
description: 29 pages
Efficient application of the Radiance Enhancement method for detection of the forest fires due to combustion-originated reflectance
Creators: name: Siddiqui, Rehan
name: Jagpal, Rajinder K.
name: Abrarov, Sanjar M.
name: Quine, Brendan M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The existing methods for detection of the cloud scenes are applied at relatively small spectral range within shortwave upwelling radiative wavelength flux. We have reported a new method for detection of the cloud scenes based on the Radiance Enhancement (RE). This method can be used to cover a significantly wider spectral range from 1100 nm to 1700 nm by using datasets from the space-orbiting micro-spectrometer Argus 1000. Due to high sunlight reflection of the smoke originated from the forest or field fires the proposed RE method can also be implemented for detection of combustion aerosols. This approach can be a promising technique for efficient detection and continuous monitor of the seasonal forest and field fires. To the best of our knowledge this is the first report showing how a cloud method can be generalized for efficient detection of the forest fires due to combustion-originated reflectance.
description: 21 pages, 12 figures, 1 table
Orbital ordering induced ferroelectricity in SrCrO3
Creators: name: Gupta, Kapil
name: Mahadevan, Priya
name: Mavropoulos, Phivos
name: Lezaic, Marjana
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using density functional theory calculations, ultrathin films of SrVO3(d1) and SrCrO3(d2) on SrTiO3 substrates have been studied as possible multiferroics. Although both are metallic in the bulk limit, they are found to be insulating as a result of orbital ordering driven by lattice distortions at the ultrathin limit. While the distortions in SrVO3 have a first-order Jahn-Teller origin, those in SrCrO3 are ferroelectric in nature. This route to ferroelectricity (FE) results in polarizations comparable with conventional ferroelectrics.
description: Accepted in Phys. Rev. Lett
Jurisdiction Over Endangered Species' Habitat: the Impacts of People and Property on Recovery Planning
Creators: name: Hatch, Leila
name: Uriarte, Maria
name: Fink, Daniel
name: Aldrich-Wolfe, Laura
name: Allen, Richard G.
name: Webb, Colleen
name: Zamudio, Kelly
name: Power, Alison
Publisher: name: Columbia University
Year: 2002
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Wildlife conservation

description: Coordinating management among multiple landowners and jurisdictional agencies is one of the greatest challenges confronting conservation planning. In this study, we assessed the impacts on recovery progress of the people and property involved in recovery plan development and implementation. We compared indices of recovery progress among endangered species whose primary habitat falls into one of four federal jurisdiction categories: nonfederal land only, <50% federal land, >50% but not all federal land, and all federal land. Species found exclusively on federal land are more likely to be improving in status. This may result from the fact that overall implementation of recovery tasks is lower among species occurring exclusively on nonfederal lands. Revision status, the existence of a centralized database, the designation of a person or committee to coordinate plan implementation, the parties involved in drafting the plan, and those designated as responsible for implementing recovery tasks are also significant factors in determining recovery plan implementation. Specifically, diversity of recovery team membership and the average number of participants increase with increasing federal jurisdiction, and tasks are more likely to be completed when more parties are involved in developing recovery plans. However, fewer recovery tasks are completed as the number of parties involved in implementation increases, suggesting that species on federal lands may benefit from less division of labor among agencies. Differences in drafting plans and administering their implementation appear to be stronger determinants of the observed variation in recovery success than differences in the kinds of threats facing species and their habitats.
Exploiting regional reanalysis data for assessing long-term trends of the human thermal bioclimate in Greece
Creators: name: Agathangelidis, Ilias
name: Giannaros, Christos
name: Galanaki, Elissavet
name: Cartalis, Constantinos
name: Kotroni, Vassiliki
name: Lagouvardos, Konstantinos
name: Matzarakis, Andreas
Publisher: name: Zenodo
Year: 2023

description: This presentation was given at the 2023 Annual Meeting of the European Meteorological Society in Bratislava, Slovakia (3-8 September). It provides information on the combined use of regional reanalysis (CERRA in particular) and population data for human-biometeorological applications. Overall information about the HEAT-ALARM ("Development of a heat-health warning system in Greece") research project are also provided.
Mujeres Iberoamericanas y Derechos Humanos: Experiencias feministas, acción política y exilios, coordinada por María Dolores Ramos Palomo, Milagros León Vegas, Victor J. Ortega Muñoz, Sergio Blanco Fajardo. Athenaica, Ediciones Universitarias. 2016
Creators: name: Monreal Gimeno, María Del Carmen
Publisher: name: Comparative Cultural Studies - European and Latin American Perspectives
Year: 2020

description: Comparative Cultural Studies - European and Latin American Perspectives, Vol. 5 No. 9 (2020)
$d$-balanced squeezing function
Creators: name: Gupta, Naveen
name: Pant, Sanjay Kumar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32F45, 32H02

description: We introduce the notion of squeezing function corresponding to $d$-balanced domains motivated by the concept of generalized squeezing function given by Rong and Yang. In this work we study some of its properties and its relation with Fridman invariant.
description: 12 pages, title changed, typos corrected, published in Complex Vari. Elliptic Equ
Development and Translation of Mass Spectrometry in the Fields of Non-Adherence and Covid-19
Creators: name: Lane, Dan
Publisher: name: University of Leicester
Year: 2023
Subjects: Uncategorized

description: Non-adherence is the failure to follow prescribed treatment regimens. In cardiometabolic diseases (e.g., hypertension, type 2 diabetes mellitus etc), non-adherence is directly linked with increased risk of hospitalisation and early all-cause mortality. These endpoints are completely avoidable. However, the incidence of non-adherence may occur in >25% of patients. New chemical adherence tests (CAT) have recently been adopted for clinical use in the UK (circa. 2014), and these represent the gold-standard measure for determining adherence. Using liquid-chromatography tandem mass spectrometry (LC-MS/MS), biomatrices (e.g., urine/plasma) are tested qualitatively for the presence of medications to indicate ingestion. Clinically, CAT is not widespread (only available in specialist clinics), it is slow (>60 minutes per sample), and it poses a risk of false results (quantitative data may identify sporadic dosing). This thesis developed a set of guidelines regarding the use of CAT, which was published and endorsed by the European Society of Hypertension Adherence Working Group. Then, Fast (<6.5 minute) and UltraFast (<45 second) LC-MS/MS quantitative assays were developed, optimised, and validated to provide platforms amendable for high-throughput testing. An automated R-based validation processor was also built to deal with untenable validation datasets during LC-MS/MS development. The initial aims of the thesis then shifted due to the COVID-19 pandemic. Here, the Department of Health and Social Care (DHSC) set a UK-wide directive to rapidly develop and implement novel SARS-CoV-2 testing devices for mass screening (“Operation Moonshot”). The latter half of this work follows the role of this thesis in Operation Moonshot. A proteomic LC-MS/MS assay was developed. Using a novel viral peptide-capture approach, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) nucleocapsid peptides were successfully resolved from human saliva for the determination of active infection. This assay was then tested against the gold-standard, reverse transcriptase polymerase chain reaction (RT-PCR), to assess its clinical utility.
EFFECT OF FERTILIZER RATE ON ROOT SYSTEM DEVELOPMENT OF SWEET PEPPER VARIETIES AND HYBRIDS
Creators: name: Amanturdiyev, Ilkhom
name: Kholmuminov, Shukhrat
Publisher: name: Zenodo
Year: 2023

description: The article presents information on the development of the root system when the Marjona variety and the Zombello F1 hybrid of sweet pepper are grown in the conditions of film greenhouses in the meadow gray soils of Samarkand region, Samarkand district, with different fertilizer rates.
On Secrecy Capacity of Fast Fading MIMOME Wiretap Channels With Statistical CSIT
Creators: name: Lin, Shih-Chun
name: Lin, Cheng-Liang
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, we consider secure transmissions in ergodic Rayleigh fast-faded multiple-input multiple-output multiple-antenna-eavesdropper (MIMOME) wiretap channels with only statistical channel state information at the transmitter (CSIT). When the legitimate receiver has more (or equal) antennas than the eavesdropper, we prove the first MIMOME secrecy capacity with partial CSIT by establishing a new secrecy capacity upper-bound. The key step is to form an MIMOME degraded channel by dividing the legitimate receiver's channel matrix into two submatrices, and setting one of the submatrices to be the same as the eavesdropper's channel matrix. Next, under the total power constraint over all transmit antennas, we analytically solve the channel-input covariance matrix optimization problem to fully characterize the MIMOME secrecy capacity. Typically, the MIMOME optimization problems are non-concave. However, thank to the proposed degraded channel, we can transform the stochastic MIMOME optimization problem to be a Schur-concave one and then find its solution. Besides total power constraint, we also investigate the secrecy capacity when the transmitter is subject to the practical per-antenna power constraint. The corresponding optimization problem is even more difficult since it is not Schuar-concave. Under the two power constraints considered, the corresponding MIMOME secrecy capacities can both scale with the signal-to-noise ratios (SNR) when the difference between numbers of antennas at legitimate receiver and eavesdropper are large enough. However, when the legitimate receiver and eavesdropper have a single antenna each, such SNR scalings do not exist for both cases.
description: submitted to IEEE Transactions on Wireless Communications
C*-algebras associated with endomorphisms of groups
Creators: name: Vieira, Felipe
Publisher: name: arXiv
Year: 2013
Subjects: subject: Functional Analysis (math.FA)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L05

description: In this work we construct a C*-algebra from an injective endomorphisms of some group G, allowing the endomorphism to have infinite cokernel. We generalize results obtained by I. Hirshberg and also by J. Cuntz and A. Vershik. In good cases we show that the C*-algebra that we study is classifiable by Kirchberg's classification theorem, with K-groups equal to K*(C*(G)).
description: 24 pages, no figures
Musica e Identidad
Creators: name: Oramas Oliva, Óscar
Publisher: name: Comparative Cultural Studies - European and Latin American Perspectives
Year: 2020

description: The article analyzes music as a powerful identification factor throughout the process of formation of the Cuban national identity. Music is one of the most socialized artistic aspects in Cuba. To talk about the causes of the influence of music on the social psychology and identity of the Cuban, it is essential to consider the factors that shaped the nationality: the colonizers and the natives of Africa. National thinkers such as Don Fernando Ortiz, Alejo Carpentier and Rogelio Martínez Furé have explained that African slaves, who contributed so much to the formation of Cuban nationality, and therefore to all Cuban artistic manifestations, through musical instruments and the dances, fought to preserve their respective identities against the Spanish colonialist. It is evident that music played a very important role in the lives of those men, who in good or bad spirits, populated our country. Later music was important in the churches. La Guantanamera, the cha-cha-cha and, finally, the Buenavista Social Club group, are considered urbi e orbi as current testimonies of the Cuban identity. So, Cuban music is a true synthesis of essential elements of its history: colonization, slavery, transculturation and the protest of the oppressed, who channeled their rebellion through expressing their feelings with musical compositions in a spontaneous and later more elaborate way. Music in Cuba has been, and is, an instrument of communication and creation that has shaped the Cuban and constitutes an outstanding ingredient in the formation of cultural and national identity.
description: Comparative Cultural Studies - European and Latin American Perspectives, Vol. 5 No. 9 (2020)
A counterexample to a question of Hof, Knill and Simon
Creators: name: Labbé, Sébastien
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 68R15

description: In this article, we give a negative answer to a question of Hof, Knill and Simon (1995) concerning purely morphic sequences obtained from primitive morphism containing an infinite number of palindromes. Proven for the binary alphabet by B. Tan in 2007, we show the existence of a counterexample on the ternary alphabet.
description: 11 pages, 0 figures
El danzón en los estudiantes de Licenciatura en Comunicación Social de la Universidad de Matanzas. Su conocimiento y representación social
Creators: name: Mercadet Portillo, Nancy Narcisa
name: Ortega Suárez, Jorge Domingo
Publisher: name: Comparative Cultural Studies - European and Latin American Perspectives
Year: 2020

description: A priority objective of the Multicultural Studies “Fernando Ortiz” Department (CEMFO) is to raise the epistemic level of students of Social and Humanistic Sciences, respect to the intangible cultural heritage of the Cuban nation and its development in the province of Matanzas. The article informs the results of a research guided by qualitative and critic paradigms, focused on the knowledge and social representation of a sample of foreign languages students about danzón, created by musician Miguel Ramón Demetrio Faílde y Pérez (1852-1921) who premiered it in Matanzas, his hometown, on January 1, 1879; that as a rhythm it assimilated musical elements of cosmopolitan origin and, in turn, became basic with respect to others such as the danzonete (1929), the mambo (1938), popularized worldwide ten years later by another musician of Matanzas, Dámaso Pérez Prado (1916-1989); and the cha-cha-chá (1951). Based on the results of the research, the key epistemic concepts of a system of teaching activities were designed to develop, in the student worldview, knowledge and a positive social representation of the heritage value of the danzón. The authors are currently researching Social Communication students, with similar purposes to help their best future professional performance.
description: Comparative Cultural Studies - European and Latin American Perspectives, Vol. 5 No. 9 (2020)
N=1 supersymmetric Yang-Mills theory on the lattice
Creators: name: Bergner, Georg
name: Montvay, Istvan
name: Münster, Gernot
name: Sandbrink, Dirk
name: Özugurel, Umut D.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Numerical simulations of supersymmetric theories on the lattice are intricate and challenging with respect to their theoretical foundations and algorithmic realisation. Nevertheless, the simulations of a four-dimensional supersymmetric gauge theory have made considerable improvements over the recent years. In this contribution we summarise the results of our collaboration concerning the mass spectrum of this theory. The investigation of systematic errors allows now a more precise estimate concerning the expected formation of supersymmetric multiplets of the lightest particles. These multiplets contain flavour singlet mesons, glueballs, and an additional fermionic state.
description: presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), 29 July - 3 August 2013, Mainz, Germany
What Makes an Online Instructional Video Compelling?
Creators: name: Hibbert, Melanie C.
Publisher: name: Columbia University
Year: 2014
Subjects: Instructional systems--Design
Educational technology
Education

description: Video has supported education for many years, and in online courses instructional videos are often a key component. To learn more about compelling video, a team at the Columbia University School of Continuing Education examined analytics from the video hosting platform and recruited 10 students to participate in in-depth interviews. Drawing from both quantitative and qualitative data, emerging patterns provide some insight as to what characteristics of online videos students describe as compelling, and what types of videos receive the most views.
α-Glucosidase Inhibitory and Antioxidant Activities of Ethanolic Extracts of Different Parts of Lysiphyllum strychnifolium and Their Constituents
Creators: name: Kidruangphokin, Meranee
name: Suphrom, Nungruthai
name: Boonphong, Surat
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Molecular Biology
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: Science Policy
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: The crude ethanolic extracts of different parts (root, stem, leaves and flower) of Lysiphyllum strychnifolium were tested for α-glucosidase inhibitory and antioxidant activities. Since all extracts showed good inhibitory activity, active constituents were isolated. Thirteen known compounds, including three dihydroflavanones, three dihydrochalcones, two stilbenes, flavan-3-ol, flavonol, cyclitol, phenolic ethyl ester and phenolic acid were isolated, and their α-glucosidase inhibitory effect and antioxidant activity were evaluated. Phloretin 4’-O-(6”-O-galloyl)-β-D-glucoside from the leaves extract showed potent α-glucosidase inhibitory activity (IC50 = 0.0162 ± 0.0014 mM) and potent antioxidant activity (IC50 = 19.26 ± 0.95 μM), each more potent than the positive controls. The compounds were investigated for their structure–activity relationship (SAR) in both activities. The number and position of hydroxy groups seemed to play a crucial role in increasing α-glucosidase inhibitory and antioxidant activities.
Temporal characterization of broadband femtosecond laser pulses by third-harmonic dispersion scan with ptychographic retrieval
Creators: name: Gomes, Tiago
name: Canhota, Miguel
name: Crespo, Helder
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a new variant of dispersion scan (d-scan) based on surface third-harmonic generation (STHG) and a ptychographic algorithm taylored for full retrieval (amplitude and phase) of broadband laser pulses. We demonstrate the technique by temporally measuring and compressing few-cycle pulses with 7 fs and 2.5 nJ from a Ti:Sapphire oscillator, using a sapphire window as the nonlinear medium. The results are in very good agreement with standard second-harmonic d-scan measurements based on a nonlinear crystal. The intrinsically broadband and phase-matching-independent nature of STHG make this technique very suitable for the characterization of ultrashort laser pulses over a broad wavelength range extending into the mid-infrared.
description: 7 pages, 5 figures. Submitted to Optics Letters