cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Rhagovelia bocaina Moreira & Ribeiro 2009
Creators: name: Moreira, Felipe Ferraz Figueiredo
name: Barbosa, Julianna Freires
name: Ribeiro, José Ricardo Inacio
name: Alecrim, Viviani Pereira
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Veliidae
Rhagovelia
Rhagovelia bocaina

description: Rhagovelia bocaina Moreira & Ribeiro, 2009
Geographical distribution: Brazil.
Distribution in Brazil: Southeast Region (SP) (Moreira & Ribeiro 2009).
description: Published as part of Moreira, Felipe Ferraz Figueiredo, Barbosa, Julianna Freires, Ribeiro, José Ricardo Inacio & Alecrim, Viviani Pereira, 2011, Checklist and distribution of semiaquatic and aquatic Heteroptera (Gerromorpha and Nepomorpha) occurring in Brazil 2958, pp. 1-74 in Zootaxa 2958 (1) on page 24, DOI: 10.11646/zootaxa.2958.1.1, http://zenodo.org/record/5281851
A Global Decline in Adolescents’ Subjective Well-Being: a Comparative Study Exploring Patterns of Change in the Life Satisfaction of 15-Year-Old Students in 46 Countries
Creators: name: Marquez, Jose
name: Long, Emily
Publisher: name: Apollo - University of Cambridge Repository
Year: 2020
Subjects: Article
Subjective well-being
Life satisfaction
PISA
Adolescence
Happiness

description: Abstract: There is a growing body of research that demonstrates declines in subjective well-being and increases in mental health problems among children and young people in recent decades. However, there is little comparative research examining changes in adolescents’ life satisfaction (LS) across a large number of countries, and critically, how this differs across sociodemographic groups. This study addresses this question by investigating changes in the LS of 15-year-old students between 2015 and 2018, with particular attention given to differences by gender, socio-economic status, immigrant background and urbanity. Data for this study come from the Programme for International Student Assessment (PISA). Due to the skewed nature of LS scale variables, the current study includes both mean levels of LS in a 0 to 10 scale, and the proportion of students reporting low LS (5 points or less). Linear regression models were used. Results demonstrate a global decline in mean levels of LS in 39 out of the 46 countries. In most countries, mean LS declined more among girls than among boys. Mean LS declined more, and the proportion of students reporting low LS increased more, among non-immigrant students and those of higher SES in the majority of countries. Findings regarding rural or urban communities were mixed. We advise that heterogeneity across all sociodemographic groups needs to be accounted for in public policy efforts to increase LS among young people.
Calculation of epsilon'/epsilon
Creators: name: Bertolini, Stefano
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I shortly review the present status of the theoretical calculations of epsilon'/epsilon and the comparison with the present experimental results. I discuss the role of higher order chiral corrections and in general of non-factorizable contributions for the explanation of the Delta I = 1/2 selection rule and direct CP violation in kaon decays. Still lacking reliable lattice calculations, analytic methods and phenomenological approaches are helpful in understanding correlations among theoretical effects and the experimental data. Substantial progress from lattice QCD is expected in the coming years.
description: 10 pages, Invited talk at the 9th Int. Symposium on Heavy Flavour Physics, Pasadena, CA, 10-13 September 2001 Comments added on Table 1
Lasing on hybridized soliton frequency combs
Creators: name: Letsou, Theodore P.
name: Kazakov, Dmitry
name: Ratra, Pawan
name: Columbo, Lorenzo L.
name: Brambilla, Massimo
name: Prati, Franco
name: Rimoldi, Cristina
name: Cin, Sandro Dal
name: Opačak, Nikola
name: Everitt, Henry O.
name: Piccardo, Marco
name: Schwarz, Benedikt
name: Capasso, Federico
Publisher: name: arXiv
Year: 2024
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Coupling is an essential mechanism that drives complexity in natural systems, transforming single, non-interacting elements into intricate networks with rich physical properties. Here, we demonstrate a chip-scale coupled laser system that exhibits complex optical states impossible to achieve in an uncoupled system. We show that a pair of coupled semiconductor ring lasers spontaneously forms a frequency comb consisting of the hybridized modes of its coupled cavity, exhibiting a large number of phase-locked tones that anticross with one another. Experimental coherent waveform reconstruction reveals that the hybridized frequency comb manifests itself as pairs of bright and dark picosecond-long solitons circulating simultaneously. The dark and bright solitons exit the coupled cavity at the same time, leading to breathing bright solitons temporally overlapped with their dark soliton counterparts - a state inaccessible for a single, free-running laser. Our results demonstrate that the rules that govern allowable states of light can be broken by simply coupling elements together, paving the way for the design of more complex networks of coupled on-chip lasers.
description: 13 pages, 3 figures
Computing resonant modes of circular cylindrical resonators by vertical mode expansions
Creators: name: Shi, Hualiang
name: Lu, Ya Yan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Open subwavelength cylindrical resonators of finite height are widely used in various photonics applications. Circular cylindrical resonators are particularly important in nanophotonics, since they are relatively easy to fabricate and can be designed to exhibit different resonance effects. In this paper, an efficient and robust numerical method is developed for computing resonant modes of circular cylinders which may have a few layers and may be embedded in a layered background. The resonant modes are complex-frequency outgoing solutions of the Maxwell's equations with no sources or incident waves. The method uses field expansions in one-dimensional (1D) ``vertical'' modes to reduce the original three-dimensional eigenvalue problem to 1D problems, and uses Chebyshev pseudospectral method to compute the 1D modes and set up the discretized eigenvalue problem. In addition, a new iterative scheme is developed so that the 1D nonlinear eigenvalue problems can be reliably solved. For metallic cylinders, the resonant modes are calculated based on analytic models for the dielectric functions of metals. The method is validated by comparisons with existing numerical results, and it is also used to explore subwavelength dielectric cylinders with high-$Q$ resonances and analyze gold nanocylinders.
Farmers' Choice of Cattle Marketing Channels in Rural South Africa: A Transaction Cost Economics Perspective
Creators: name: Ndoro, Jorine
name: Mudhara, Maxwell
name: Chimonyo, Michael
name: Hitayezu, Patrick
name: Ndoro, Jorine
name: Mudhara, Maxwell
name: Chimonyo, Michael
name: Hitayezu, Patrick
Publisher: name: Unknown
Year: 2015
Subjects: subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business

description: This study empirically tests the hypotheses that information, negotiation, and monitoring costs influence the decision to sell to private buyers, speculators, or at the auction pens among smallholder farmers in KwaZulu-Natal, South Africa. Based on survey data, the results of a Multinomial Logit regression reveal that the probability of selling at the auction vs. selling at farm gate increases during the end-of-year festive season, indicating the scope of market uncertainty surrounding auctions. They also show that the probability of selling at the auction vs. selling to speculators increases with proximity to the auction marketplace and decreases with knowledge of the buyer, suggesting higher opportunity costs of time and efforts associated with selling at the auction, and considerable negotiation and monitoring costs incurred when selling to speculators. Other significant predictors of auction channel selection are volume supplied and farmer’s age. This study concludes with some policy implications.
Estimation of Shadow Wage in Agricultural Household Model in Nepal
Creators: name: Nepal, Atul
name: Nelson, Carl
name: Nepal, Atul
name: Nelson, Carl
Publisher: name: Unknown
Year: 2015
Subjects: subject: Consumer/Household Economics
subject: Financial Economics
subject: Wage
subject: Separability
subject: Agricultural Household

description: In developing countries, where most of the families work on their own farms, wage or labor-related income cannot be observed directly. This paper contributes to the literature on gender wage difference in labor and development economics by developing a new approach to estimate the shadow wage of agricultural households in Nepal. Using a general functional form, we first derive the shadow wage from a theoretical model. Then, ward-level fixed effect is used to estimate the shadow wage by gender for Nepalese agricultural households. We find that productivity of women is higher at the mean, median and 75th quantile than that of men. Despite their higher productivity, females are underpaid at the mean and median in the labor market compared to their marginal productivity, calling for greater investments to involve female in the production process.
A comparison of optimisation algorithms for high-dimensional particle and astrophysics applications
Creators: name: Balázs, Csaba
name: Van Beekveld, Melissa
name: Caron, Sascha
name: Dillon, Barry M.
name: Farmer, Ben
name: Fowlie, Andrew
name: Garrido-Merchán, Eduardo C.
name: Handley, Will
name: Hendriks, Luc
name: Jóhannesson, Guðlaugur
name: Leinweber, Adam
name: Mamužić, Judita
name: Martinez, Gregory D.
name: Otten, Sydney
name: De Austri, Roberto Ruiz
name: Scott, Pat
name: Searle, Zachary
name: Stienen, Bob
name: Vanschoren, Joaquin
name: White, Martin
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: Regular Article - Theoretical Physics
Phenomenology of Field Theories in Higher Dimensions
Supersymmetry Phenomenology

description: Abstract: Optimisation problems are ubiquitous in particle and astrophysics, and involve locating the optimum of a complicated function of many parameters that may be computationally expensive to evaluate. We describe a number of global optimisation algorithms that are not yet widely used in particle astrophysics, benchmark them against random sampling and existing techniques, and perform a detailed comparison of their performance on a range of test functions. These include four analytic test functions of varying dimensionality, and a realistic example derived from a recent global fit of weak-scale supersymmetry. Although the best algorithm to use depends on the function being investigated, we are able to present general conclusions about the relative merits of random sampling, Differential Evolution, Particle Swarm Optimisation, the Covariance Matrix Adaptation Evolution Strategy, Bayesian Optimisation, Grey Wolf Optimisation, and the PyGMO Artificial Bee Colony, Gaussian Particle Filter and Adaptive Memory Programming for Global Optimisation algorithms.
Rhagovelia elegans Uhler 1894
Creators: name: Moreira, Felipe Ferraz Figueiredo
name: Barbosa, Julianna Freires
name: Ribeiro, José Ricardo Inacio
name: Alecrim, Viviani Pereira
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Veliidae
Rhagovelia
Rhagovelia elegans

description: Rhagovelia elegans Uhler, 1894
Geographical distribution: Hispaniola, St. Kitts & Nevis, Dominica, Martinique, St. Lucia, St. Vincent & Grenadines, Colombia, Grenada, Venezuela, Costa Rica, Trinidad & Tobago, Panama, Brazil, and Ecuador.
Distribution in Brazil: North and Southeast Regions (PA, AM, RJ) (Drake 1949; Bacon 1956; Polhemus 1997).
description: Published as part of Moreira, Felipe Ferraz Figueiredo, Barbosa, Julianna Freires, Ribeiro, José Ricardo Inacio & Alecrim, Viviani Pereira, 2011, Checklist and distribution of semiaquatic and aquatic Heteroptera (Gerromorpha and Nepomorpha) occurring in Brazil 2958, pp. 1-74 in Zootaxa 2958 (1) on page 24, DOI: 10.11646/zootaxa.2958.1.1, http://zenodo.org/record/5281851
Time advancement in resonance regions of pi-N scattering
Creators: name: Kelkar, N. G.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We evaluate the time delay in some of the established resonance regions of $πN$ elastic scattering. In addition to the positive peaks corresponding to resonances, we identify broad regions of negative time delay or time advancement which restrict the energy ranges within which the resonances can be located.
description: 10 pages, LaTex, including 4 figures
Coherent spin dynamics of solitons in the organic spin chain compounds ($o$-DMTTF)$_2X$ ($X$ = Cl, Br)
Creators: name: Zeisner, J.
name: Pilone, O.
name: Soriano, L.
name: Gerbaud, G.
name: Vezin, H.
name: Jeannin, O.
name: Fourmigué, M.
name: Büchner, B.
name: Kataev, V.
name: Bertaina, S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We studied the magnetic properties, in particular dynamics, of the correlated spins associated with natural defects in the organic spin chain compounds ($o$-DMTTF)$_2X$ ($X$ = Br, Cl) by means of electron spin resonance (ESR) spectroscopy. Both materials exhibit spin-Peierls transitions at temperatures around 50 K [P. Foury-Leylekian et al. Phys. Rev. B 84, 195134 (2011)], which allow a separation of the properties of defects inside the chains from the magnetic response of the spin chains. Indeed, continuous wave ESR measurements performed over a wide temperature range evidence the evolution of the spin dynamics from being governed by the spins in the chains at elevated temperatures to a low-temperature regime which is dominated by defects within the spin-dimerized chains. Such defects polarize the antiferromagnetically coupled spins in their vicinity, thereby leading to a finite local alternating magnetization around the defect site which can be described in terms of a soliton, i.e. a spin 1/2 quasiparticle built of many correlated spins, pinned to the defect. In addition, contributions of triplon excitations of the spin-dimerized state to the ESR response below the transition temperature were observed which provides a spectroscopic estimate for the spin-gap of the studied systems. Moreover, details of spin dynamics deep in the spin-Peierls phase were investigated by pulse ESR experiments which revealed Rabi-oscillations as signatures of coherent spin dynamics. From a comparison of the characteristic damping times of the Rabi oscillations with measurements of the spin relaxation times by means of primary-echo decay and CPMG methods it becomes evident that inhomogeneities in local magnetic fields strongly contribute to the soliton decoherence.
description: 15 pages, 8 figures, accepted version
MOESM10 of Hemimethylation of CpG dyads is characteristic of secondary DMRs associated with imprinted loci and correlates with 5-hydroxymethylcytosine at paternally methylated sequences
Creators: name: Nechin, Julianna
name: Tunstall, Emma
name: Naideline Raymond
name: Hamagami, Nicole
name: Pathmanabhan, Chris
name: Forestier, Samantha
name: Davis, Tamara
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Developmental Biology

description: Additional file 10: Figure S4. Reciprocal crosses illustrate that allele-specific methylation is dependent on parental origin, not strain. Data shown are from DNA derived from a 13.5 dpc CxB embryo. (A) Paternally and maternally methylated secondary DMRs. (B) Paternally and maternally methylated primary DMRs. Details as described in Additional file 7: Figure S1.
Benchmarking quantum machine learning kernel training for classification tasks
Creators: name: Alvarez-Estevez, Diego
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Quantum-enhanced machine learning is a rapidly evolving field that aims to leverage the unique properties of quantum mechanics to enhance classical machine learning. However, the practical applicability of these methods remains an open question, particularly beyond the context of specifically-crafted toy problems, and given the current limitations of quantum hardware. This study focuses on quantum kernel methods in the context of classification tasks. In particular, it examines the performance of Quantum Kernel Estimation (QKE) and Quantum Kernel Training (QKT) in connection with two quantum feature mappings, namely ZZFeatureMap and CovariantFeatureMap. Remarkably, these feature maps have been proposed in the literature under the conjecture of possible near-term quantum advantage and have shown promising performance in ad-hoc datasets. In this study, we aim to evaluate their versatility and generalization capabilities in a more general benchmark, encompassing both artificial and established reference datasets. Classical machine learning methods, specifically Support Vector Machines (SVMs) and logistic regression, are also incorporated as baseline comparisons. Experimental results indicate that quantum methods exhibit varying performance across different datasets. Despite outperforming classical methods in ad-hoc datasets, mixed results are obtained for the general case among standard classical benchmarks. Our experiments call into question a general added value of applying QKT optimization, for which the additional computational cost does not necessarily translate into improved classification performance. Instead, it is suggested that a careful choice of the quantum feature map in connection with proper hyperparameterization may prove more effective.
description: 19 pages, 4 figures; extended experiments and datasets, fixed typos; in consideration for publication in IEEE TQE
Assessing public policy impacts: one application of Cooperatives Participating of Agricultural Cooperatives Capitalization Program (Procap-Agro) in Brazil
Creators: name: Neves, Mateus De Carvalho
name: Braga, Marcelo J.
name: Neves, Mateus De Carvalho
name: Braga, Marcelo J.
Publisher: name: Unknown
Year: 2015
Subjects: Agricultural and Food Policy

description: In this paper we proposed an instrumental framework for assessing impacts of credit public policies applied to agricultural cooperatives in Brazil. Considering whether cooperatives that received funding of the Agricultural Cooperatives Capitalization Program (PROCAP-AGRO) have undergone changes related to operating efficiency and financial structure. For this, was used financial ratios and econometric approach. Results indicating improvements in the cooperatives after the PROCAPAGRO on certain financial ratios and distinct effects on the technical efficiency, as a result of the varied use of program resources. Finally, we conclude about the potential of the proposed assessment methodology.
Cosmological consequences of a built-in cosmological constant model
Creators: name: Arbab, Arbab I.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have analyzed the implications of a phenomenological model of a built-in cosmological constant of Rastall and Al-Rawaf -Taha type. We have produced the presently observed cosmic acceleration with the aid of introducing a positive cosmological constant. We have shown that the cosmological models of the type $Λ\propto\frac{\ddot R}{R}, Λ\propto H^2$ or $Λ\propto 8πGρ$ are equivalent to a built-in cosmological constant model of Al-Rawaf and Taha type. Such models are compatible with the recent observational data and do not suffer from fine tuning problems. We predict a higher lensing probability than in Einstein de Sitter and Abdel Rahman models. We also predict a higher value for the luminosity and angular diameter distances than that of Abdel Rahman model. The lens distribution peaks at relatively smaller values of the lens red-shift and occurs at higher red-shift.
description: 9 LaTex pages, 5 figures
Rhagovelia evidis Bacon 1948
Creators: name: Moreira, Felipe Ferraz Figueiredo
name: Barbosa, Julianna Freires
name: Ribeiro, José Ricardo Inacio
name: Alecrim, Viviani Pereira
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Veliidae
Rhagovelia
Rhagovelia evidis

description: Rhagovelia evidis Bacon, 1948
Geographical distribution: Brazil and Peru.
Distribution in Brazil: North Region (AM) (Bacon 1948; Pereira & Melo 2007).
description: Published as part of Moreira, Felipe Ferraz Figueiredo, Barbosa, Julianna Freires, Ribeiro, José Ricardo Inacio & Alecrim, Viviani Pereira, 2011, Checklist and distribution of semiaquatic and aquatic Heteroptera (Gerromorpha and Nepomorpha) occurring in Brazil 2958, pp. 1-74 in Zootaxa 2958 (1) on page 24, DOI: 10.11646/zootaxa.2958.1.1, http://zenodo.org/record/5281851
Rhagovelia guianana Polhemus 1997
Creators: name: Moreira, Felipe Ferraz Figueiredo
name: Barbosa, Julianna Freires
name: Ribeiro, José Ricardo Inacio
name: Alecrim, Viviani Pereira
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Veliidae
Rhagovelia
Rhagovelia guianana

description: Rhagovelia guianana Polhemus, 1997
Geographical distribution: Venezuela, Suriname, and Brazil.
Distribution in Brazil: North Region (AM) (Polhemus 1997).
description: Published as part of Moreira, Felipe Ferraz Figueiredo, Barbosa, Julianna Freires, Ribeiro, José Ricardo Inacio & Alecrim, Viviani Pereira, 2011, Checklist and distribution of semiaquatic and aquatic Heteroptera (Gerromorpha and Nepomorpha) occurring in Brazil 2958, pp. 1-74 in Zootaxa 2958 (1) on page 24, DOI: 10.11646/zootaxa.2958.1.1, http://zenodo.org/record/5281851
Hamiltonian Theory of the FQHE: Conserving Approximation for Incompressible Fractions
Creators: name: Murthy, Ganpathy
Publisher: name: arXiv
Year: 2001
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A microscopic Hamiltonian theory of the FQHE developed by Shankar and the present author based on the fermionic Chern-Simons approach has recently been quite successful in calculating gaps and finite tempertature properties in Fractional Quantum Hall states. Initially proposed as a small-$q$ theory, it was subsequently extended by Shankar to form an algebraically consistent theory for all $q$ in the lowest Landau level. Such a theory is amenable to a conserving approximation in which the constraints have vanishing correlators and decouple from physical response functions. Properties of the incompressible fractions are explored in this conserving approximation, including the magnetoexciton dispersions and the evolution of the small-$q$ structure factor as $ν\to\half$. Finally, a formalism capable of dealing with a nonuniform ground state charge density is developed and used to show how the correct fractional value of the quasiparticle charge emerges from the theory.
description: 15 pages, 2 eps figures
A reassessment of the "hard-steps" model for the evolution of intelligent life
Creators: name: Mills, Daniel B.
name: Macalady, Jennifer L.
name: Frank, Adam
name: Wright, Jason T.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: According to the "hard-steps" model, the origin of humanity required "successful passage through a number of intermediate steps" (so-called "hard" or "critical" steps) that were intrinsically improbable with respect to the total time available for biological evolution on Earth. This model similarly predicts that technological life analogous to human life on Earth is "exceedingly rare" in the universe. Here, we critically reevaluate the core assumptions of the hard-steps model in light of recent advances in the Earth and life sciences. Specifically, we advance a potential alternative model where there are no hard steps, and evolutionary novelties (or singularities) required for human origins can be explained via mechanisms outside of intrinsic improbability. Furthermore, if Earth's surface environment was initially inhospitable not only to human life, but also to certain key intermediate steps in human evolution (e.g., the origin of eukaryotic cells, multicellular animals), then the "delay" in the appearance of humans can be best explained through the sequential opening of new global environmental windows of habitability over Earth history, with humanity arising relatively quickly once the right conditions were established. In this co-evolutionary (or geobiological) scenario, humans did not evolve "early" or "late" with respect to the total lifespan of the biosphere, but "on time."
Inverse Problem for the Yang–Mills Equations
Creators: name: Chen, Xi
name: Lassas, Matti
name: Oksanen, Lauri
name: Paternain, Gabriel P.
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: Article

description: Abstract: We show that a connection can be recovered up to gauge from source-to-solution type data associated with the Yang–Mills equations in Minkowski space R1+3. Our proof analyzes the principal symbols of waves generated by suitable nonlinear interactions and reduces the inversion to a broken non-abelian light ray transform. The principal symbol analysis of the interaction is based on a delicate calculation that involves the structure of the Lie algebra under consideration and the final result holds for any compact Lie group.
T-matrix representation of optical scattering response: Suggestion for a data format
Creators: name: Asadova, Nigar
name: Achouri, Karim
name: Arjas, Kristian
name: Auguié, Baptiste
name: Aydin, Roland
name: Baron, Alexandre
name: Beutel, Dominik
name: Bodermann, Bernd
name: Boussaoud, Kaoutar
name: Burger, Sven
name: Choi, Minseok
name: Czajkowski, Krzysztof M.
name: Evlyukhin, Andrey B.
name: Fazel-Najafabadi, Atefeh
name: Fernandez-Corbaton, Ivan
name: Garg, Puneet
name: Globosits, David
name: Hohenester, Ulrich
name: Kim, Hongyoon
name: Kim, Seokwoo
name: Lalanne, Philippe
name: Ru, Eric C. Le
name: Meyer, Jörg
name: Mun, Jungho
name: Pattelli, Lorenzo
name: Pflug, Lukas
name: Rockstuhl, Carsten
name: Rho, Junsuk
name: Rotter, Stefan
name: Stout, Brian
name: Törmä, Päivi
name: Trigo, Jorge Olmos
name: Tristram, Frank
name: Tsitsas, Nikolaos L.
name: Vallée, Renaud
name: Vynck, Kevin
name: Weiss, Thomas
name: Wiecha, Peter
name: Wriedt, Thomas
name: Yannopapas, Vassilios
name: Yurkin, Maxim A.
name: Zouros, Grigorios P.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Optics (physics.optics)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The transition matrix, frequently abbreviated as T-matrix, contains the complete information in a linear approximation of how a spatially localized object scatters an incident field. The T-matrix is used to study the scattering response of an isolated object and describes the optical response of complex photonic materials made from ensembles of individual objects. T-matrices of certain common structures, potentially, have been repeatedly calculated all over the world again and again. This is not necessary and constitutes a major challenge for various reasons. First, the resources spent on their computation represent an unsustainable financial and ecological burden. Second, with the onset of machine learning, data is the gold of our era, and it should be freely available to everybody to address novel scientific challenges. Finally, the possibility of reproducing simulations could tremendously improve if the considered T-matrices could be shared. To address these challenges, we found it important to agree on a common data format for T-matrices and to enable their collection from different sources and distribution. This document aims to develop the specifications for storing T-matrices and associated metadata. The specifications should allow maximum freedom to accommodate as many use cases as possible without introducing any ambiguity in the stored data. The common format will assist in setting up a public database of T-matrices.
description: This is a revised version of the article as submitted to the Journal of Quantitative Spectroscopy and Radiative Transfer that was finally published there
Efficiency and Technological Progress in Brazilian Agricultural Cooperatives
Creators: name: Neves, Mateus De Carvalho
name: Goncalves, Marcos
name: Gomes, Adriano
name: Braga, Marcelo J.
name: Neves, Mateus De Carvalho
name: Goncalves, Marcos
name: Gomes, Adriano
name: Braga, Marcelo J.
Publisher: name: Unknown
Year: 2015
Subjects: Agribusiness
Research and Development/Tech Change/Emerging Technologies

description: Against a background of concentrated production chains and profound changes in the agri-food system, Brazilian agricultural cooperatives are challenged to remain competitive to withstand large multinational companies. This paper proposed to investigate nuances in the behavior of these cooperative organizations due to the changes in their operating environment. It does so by analyzing alterations in efficiency and total factor productivity of a sample of Brazilian agricultural cooperatives, classified according to size, from 2006 to 2010. For this, non-parametric models of Data Envelopment Analysis (DEA) and the Malmquist Index were used. Through the DEA approach, it was seen that larger cooperatives faced decreasing efficiency, while smaller ones experienced the opposite. Moreover, as demonstrated by the Malmquist Indices, the cooperatives, on average, presented negative technological variations, and smaller cooperatives underwent positive changes in technical efficiency. The results suggest directions which public policies could take to strengthen Brazilian agricultural cooperatives in the face of new challenges.
Circulating SPINT1 is a biomarker of pregnancies with poor placental function and fetal growth restriction
Creators: name: Kaitu’u-Lino, Tu’uhevaha J.
name: MacDonald, Teresa M.
name: Cannon, Ping
name: Nguyen, Tuong-Vi
name: Hiscock, Richard J.
name: Haan, Nick
name: Myers, Jenny E.
name: Hastie, Roxanne
name: Dane, Kirsten M.
name: Middleton, Anna L.
name: Bittar, Intissar
name: Sferruzzi-Perri, Amanda N.
name: Pritchard, Natasha
name: Harper, Alesia
name: Hannan, Natalie J.
name: Kyritsis, Valerie
name: Crinis, Nick
name: Hui, Lisa
name: Walker, Susan P.
name: Tong, Stephen
Publisher: name: Apollo - University of Cambridge Repository
Year: 2020
Subjects: Article
/692/53
/692/699
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/82/80
/38/88
article

description: Funder: RANZCOG Research Foundation (RANZCOG); doi: https://doi.org/10.13039/501100001104
description: Funder: The Stillbirth Foundation
description: Funder: Tommy's; doi: https://doi.org/10.13039/501100009324
description: Funder: National Institute Health Research Manchester Academic Health Science Centre
description: Funder: RCUK | Biotechnology and Biological Sciences Research Council (BBSRC); doi: https://doi.org/10.13039/501100000268
description: Funder: Centre for Trophoblast Research
description: Abstract: Placental insufficiency can cause fetal growth restriction and stillbirth. There are no reliable screening tests for placental insufficiency, especially near-term gestation when the risk of stillbirth rises. Here we show a strong association between low circulating plasma serine peptidase inhibitor Kunitz type-1 (SPINT1) concentrations at 36 weeks’ gestation and low birthweight, an indicator of placental insufficiency. We generate a 4-tier risk model based on SPINT1 concentrations, where the highest risk tier has approximately a 2-5 fold risk of birthing neonates with birthweights under the 3rd, 5th, 10th and 20th centiles, whereas the lowest risk tier has a 0-0.3 fold risk. Low SPINT1 is associated with antenatal ultrasound and neonatal anthropomorphic indicators of placental insufficiency. We validate the association between low circulating SPINT1 and placental insufficiency in two other cohorts. Low circulating SPINT1 is a marker of placental insufficiency and may identify pregnancies with an elevated risk of stillbirth.
Search for magnetic monopole pair production in ultraperipheral Pb+Pb collisions at $\sqrt{s_{_\textrm{NN}}}=5.36$ TeV with the ATLAS detector at the LHC
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: This Letter presents a search for highly ionizing magnetic monopoles in 262$~μ$b$^{-1}$ of ultraperipheral Pb+Pb collision data at $\sqrt{s_{_\textrm{NN}}}=5.36$ TeV collected by the ATLAS detector at the LHC. A new methodology that exploits the properties of clusters of hits reconstructed in the innermost silicon detector layers is introduced to study highly ionizing particles in heavy-ion data. No significant excess above the background, which is estimated using a data-driven technique, is observed. Using a nonperturbative semiclassical model, upper limits at 95% confidence level are set on the cross-section for pair production of monopoles with a single Dirac magnetic charge in the mass range of 20-150 GeV. The search significantly improves on the previous cross-section limits for production of low-mass monopoles in ultraperipheral Pb+Pb collisions.
description: 34 pages in total, author list starting page 17, 3 figures, published in Phys. Rev. Lett. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2023-01/
A detailed electronic structure study of Vanadium metal by using different beyond-DFT methods
Creators: name: Sihi, Antik
name: Pandey, Sudhir K.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report a detailed electronic structure calculation for Vanadium (V) using DFT, DFT+$U$, $G_0W_0$, $GW_0$ and DFT+DMFT methods. The calculated values of $W$, $U$ and $J$ by cRPA method are $\sim$1.1, $\sim$3.4 and $\sim$0.52 eV, respectively. The comparison between calculated spectra (CS) and experimental spectra (ES) suggests that $W$ ($U$) is more accurate for DFT+$U$ (DFT+DMFT) method. The CS, obtained by these methods, give fairly good agreement with ES for peaks' positions except $GW_0$. The shallowness of the dips lying $\sim$ -1.5 eV and $\sim$1.0 eV in ES are properly explained by DFT+DMFT method only, due to the presence of incoherent $t_{2g}$ states. This work suggests that for the proper explanation of ES, sophisticated many-body theory is needed even for the simple metal.
Does minimum tillage with planting basins or ripping raise maize yields? Meso-panel data evidence from Zambia
Creators: name: Ngoma, Hambulo
name: Mason, Nicole
name: Sitko, Nicholas
name: Ngoma, Hambulo
name: Mason, Nicole
name: Sitko, Nicholas
Publisher: name: Unknown
Year: 2015
Subjects: subject: Crop Production/Industries
subject: Farm Management
subject: minimum tillage
subject: ripping
subject: planting basins
subject: maize yields
subject: correlated random effects
subject: Zambia

description: Despite nearly two decades of promoting minimum tillage (MT) in Zambia, there is little empirical evidence on its maize yield effects under typical smallholder conditions. We use nationally representative survey data from nearly 48,000 smallholder maize plots for the period 2008-2011 to estimate the maize yield effects of planting basins and ripping. After controlling for unobserved heterogeneity at the enumeration area level, yields were significantly higher on ripped plots compared to conventionally plowed plots if tillage is done before the rains. The gains average 577 kg/ha nation-wide and 821 kg/ha in low rainfall agro-ecological zones. The gains from planting basins relative to hand hoe tillage average 191 kg/ha when tillage is done before the onset of the rains. Thus, MT with early land preparation can raise smallholder maize yields in Zambia; however, further research would determine whether these yield benefits are large enough to offset the higher costs of MT
Effects of Spin Polarization on Electron Transport in Modulation Doped Cd(1-x)Mn(x)Te/Cd(1-y)Mg(y)Te:I Heterostructures
Creators: name: Andrearczyk, T.
name: Jaroszynski, J.
name: Karczewski, G.
name: Wrobel, J.
name: Wojtowicz, T.
name: Dietl, T.
name: Papis, E.
name: Kami'nska, E.
name: Piotrowska, A.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We examine and identify magnetoresistance mechanisms in 2D system containing a sizable concentration of magnetic ions. We argue that some of these mechanisms can serve as a tool to measure spin polarization. Lack of spin degeneracy and enhanced localization make it possible to detect an additional QHE plateau associated with extended states floating-up in vanishing magnetic field.
description: 4 revtex pages, 2 figures
A nonextensive insight to the stellar initial mass function
Creators: name: de Freitas, D. B.
name: Eufrasio, R. T.
name: Nepomuceno, M. M. F.
name: da Silva, J. R. P.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: the present paper, we propose that the stellar initial mass distributions as known as IMF are best fitted by $q$-Weibulls that emerge within nonextensive statistical mechanics. As a result, we show that the Salpeter's slope of $\sim$2.35 is replaced when a $q$-Weibull distribution is used. Our results point out that the nonextensive entropic index $q$ represents a new approach for understanding the process of the star-forming and evolution of massive stars.
description: 5 pages, 2 figures, Accepted to EPL
Measurements of the SUSY Higgs self-couplings and the reconstruction of the Higgs potential
Creators: name: Boudjema, F.
name: Semenov, A.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We address the issue of the reconstruction of the scalar potential of a two-Higgs doublet model having in mind that of the MSSM. We first consider the general CP conserving dim-4 effective potential. To fully reconstruct this potential, we show that even if all the Higgs masses and their couplings to the standard model particles are measured one needs not only to measure certain trilinear Higgs self-couplings but some of the quartic couplings as well. We also advocate expressing the Higgs self couplings in the mass basis. We show explicitly, that in the so-called decoupling limit, the most easily accessible Higgs self-couplings are given in terms of the Higgs mass while all other dependencies on the parameters of the general effective potential are screened. This helps also easily explain how, in the MSSM, the largest radiative corrections which affect these self couplings are reabsorbed by using the corrected Higgs mass. We also extend our analysis to higher order operators in the effective Higgs potential. While the above screening properties do not hold, we argue that these effects must be small and may not be measured considering the foreseen poor experimental precision in the extraction of the SUSY Higgs self-couplings.
description: 25 pages, 3 figures
Rhagovelia hambletoni Drake & Harris 1933
Creators: name: Moreira, Felipe Ferraz Figueiredo
name: Barbosa, Julianna Freires
name: Ribeiro, José Ricardo Inacio
name: Alecrim, Viviani Pereira
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Veliidae
Rhagovelia
Rhagovelia hambletoni

description: Rhagovelia hambletoni Drake & Harris, 1933
Geographical distribution: Brazil.
 Distribution in Brazil: Southeast Region (MG, RJ) (Drake & Harris 1933a; Nieser & Melo 1997; Pelli et al. 2006; Souza et al. 2006; Moreira & Ribeiro 2009).
description: Published as part of Moreira, Felipe Ferraz Figueiredo, Barbosa, Julianna Freires, Ribeiro, José Ricardo Inacio & Alecrim, Viviani Pereira, 2011, Checklist and distribution of semiaquatic and aquatic Heteroptera (Gerromorpha and Nepomorpha) occurring in Brazil 2958, pp. 1-74 in Zootaxa 2958 (1) on page 24, DOI: 10.11646/zootaxa.2958.1.1, http://zenodo.org/record/5281851
A dynamic model to analyze the sustainability of extensive common-pasture-based livestock husbandry in Sahel
Creators: name: Niemi, Jarkko
name: Hyytiainen, Kari
name: Camara, Astou
name: Fall, Cheick
name: Msangi, Siwa
name: Niemi, Jarkko
name: Hyytiainen, Kari
name: Camara, Astou
name: Fall, Cheick
name: Msangi, Siwa
Publisher: name: Unknown
Year: 2015
Subjects: subject: Environmental Economics and Policy
subject: Livestock Production/Industries
subject: livestock
subject: common pasture
subject: grazing
subject: climate change
subject: climate variability
subject: drought
subject: resilience

description: Semi-arid regions in the Sahel have faced increasing environmental pressure due to population growth and decreasing rainfall. Building on earlier research we develop a stochastic dynamic programming model that describes extensive, common-pasture-based livestock under stochastic and spatially varying weather. We extend previous research by allowing animals’ movements between two regions and allow decisions to be adjusted when new information about the weather arrives. Decision rules to sell and move animals under exogenous price, market and climate scenarios are investigated. Our numerical analysis demonstrates that in the absence of efficient feed markets and under unpredictable weather, transhumance can be a rational livestock management strategy. Increased frequency of extreme weather conditions, such as heavy drought or rainfall, can have cross-regional spillovers and larger impacts on livestock husbandry than gradual changes in the mean annual rainfall or temperature suggest. Hence, policies should aim at mitigating the negative consequences of extreme weather across regions.
Role of Access to Credit in Rice Production in Sub Saharan Africa: The Case of Mwea Irrigation Scheme in Kenya
Creators: name: Njeru, Timothy
name: Mano, Yukichi
name: Otsuka, Keijiro
name: Njeru, Timothy
name: Mano, Yukichi
name: Otsuka, Keijiro
Publisher: name: Unknown
Year: 2015
Subjects: Crop Production/Industries
International Development

description: This study investigates the possibility of boosting rice production in Sub-Saharan Africa with a special focus on the role of access to credit in rice farming in the large-scale Mwea Irrigation Scheme in Kenya. Using household level survey data, we find that the use of fertilizer and paddy yield per hectare are not significantly different among borrowers from the cooperative society, borrowers from rice traders, and non-borrowers. However, borrowers from rice traders receive lower incomes and profits compared to non-borrowers largely due to the higher interest charged. Considering that such farmers who borrow from rice traders are generally poorer in financial, physical, and human capital, and would have even made lower income and profit without rice trader credit, we suggest policies to facilitate further development of credit markets for both efficiency and equity of rice production in Mwea.
Secondary cameras onboard the Mini-EUSO experiment: Control Software and Calibration
Creators: name: Turriziani, Sara
name: Ekelund, Jonah
name: Tsuno, Katsuhiko
name: Casolino, Marco
name: Ebisuzaki, Toshikazu
Publisher: name: arXiv
Year: 2019
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Mini-EUSO is a space experiment selected to be installed inside the International Space Station. It has a compact telescope with a large field of view ($44 $\times$ 44$ sq. deg.) focusing light on an array of photo-multipliers tubes in order to observe UV emission coming from Earth's atmosphere. Observations will be complemented with data recorded by some ancillary detectors. In particular, the Mini-EUSO Additional Data Acquisition System (ADS) is composed by two cameras, which will allow us to obtain data in the near infrared, and in the visible range. These will be used to monitor the observation conditions, and to acquire useful information on several scientific topics to be studied with the main instrument, such as the physics of atmosphere, meteors, and strange quark matter. Here we present the ADS control software developed to stream cameras together with the UV main instrument, in order to grab images in an automated and independent way, and we also describe the calibration activities performed on these two ancillary cameras before flight.
description: 24 pages, 9 figures, accepted version
Rhagovelia henryi Polhemus 1997
Creators: name: Moreira, Felipe Ferraz Figueiredo
name: Barbosa, Julianna Freires
name: Ribeiro, José Ricardo Inacio
name: Alecrim, Viviani Pereira
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Veliidae
Rhagovelia
Rhagovelia henryi

description: Rhagovelia henryi Polhemus, 1997
Geographical distribution: Brazil. There is a questionable record from Panama, probably the result of mislabeling (see Polhemus 1997: 102).
Distribution in Brazil: Southeast Region (SP) (Polhemus 1997).
description: Published as part of Moreira, Felipe Ferraz Figueiredo, Barbosa, Julianna Freires, Ribeiro, José Ricardo Inacio & Alecrim, Viviani Pereira, 2011, Checklist and distribution of semiaquatic and aquatic Heteroptera (Gerromorpha and Nepomorpha) occurring in Brazil 2958, pp. 1-74 in Zootaxa 2958 (1) on page 24, DOI: 10.11646/zootaxa.2958.1.1, http://zenodo.org/record/5281851
Risk Evaluation on Logistics Finance of Agricultural Products Based on Fuzzy-AHP Model
Creators: name: PANG, Yan
name: XIA, Yangkun
name: PANG, Yan
name: XIA, Yangkun
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: Logistics finance
subject: Agricultural products
subject: Risk evaluation
subject: Fuzzy-AHP

description: The development of logistics finance business for agricultural products is the best way to realize the common interests of logistics enterprises, small and medium-sized agricultural product enterprises and financial institutions, which will contribute to the development of China's new socialist rural economy and the construction of "two-oriented society". As the agricultural products have some special attributes, it’s easy to create the risk in carrying out the logistics finance business. The paper constructs a risk evaluation indicator system for logistics finance of agricultural product, and uses the Fuzzy-AHP model to evaluate. The results show that the comprehensive risk level is normal risk, which shows that third-party logistics enterprises can carry out the logistics financial business of agricultural products, but the risks from logistics enterprises and agricultural collateral need to be prevented.