cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Central charges from Thermodynamics method in 3D gravity
Creators: name: Yekta, Davood Mahdavian
name: Golchin, Hanif
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the context of guage/gravity duality, we investigate the central charges of a number of 2-dimensional conformal field theories (CFTs) that might live on the boundary of some 3-dimensional (3D) toy models of gravity, from the thermodynamics aspect of the black holes. For many black hole solutions, the entropy product of the inner Cauchy and outer event horizons is universal (mass independent). It is proposed that for these solutions, the central charges of the left- and right-moving sectors of the dual CFTs should be the same and one may read the central charges from the universal entropy product. This provides strong motivations for investigating this prescription for BTZ and Warped AdS$_{3}$ black holes in a number of 3D gravity theories and we will show that the proposal works truly. One striking result of our analysis is that if the entropy product is not universal in any theory of 3D gravity, then the left and right central charges are not equal.
description: 19 pages, Accepted version. arXiv admin note: text overlap with arXiv:1906.00993 by other authors
The range of elementary interactions: a criticism of the standard classroom approach
Creators: name: Hernández-Bermejo, B.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Popular Physics (physics.pop-ph)
subject: Nuclear Theory (nucl-th)
subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: The finite scope of the some elementary interactions is usually presented to Physics students as a natural consequence of the time-energy uncertainty relation. It is demonstrated that this heuristic derivation is not a priori valid. Accordingly, it is argued the doubtful usefulness of this "proof" in the classroom, for it may lead to misconceptions.
Superfluidity in the interior-gap states
Creators: name: Wu, Shin-Tza
name: Yip, Sungkit
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We investigate superfluidity in the interior-gap states proposed by Liu and Wilczek. At weak coupling, we find the {\em gapless} interior-gap state unstable in physically accessible regimes of the parameter space, where the superfluid density is shown to be always negative. We therefore conclude that the spatially-uniform interior-gap phase is extremely unstable unless it is fully gapped; in this case, however, the state is rather similar to conventional BCS states.
description: To appear in Physical Review A
Recent Advances in Nanophotonics for Optofluidics
Creators: name: Yang, Sen
name: Hong, Chuchuan
name: Zhu, Guodong
name: Anyika, Theodore H.
name: Hong, Ikjun
name: Ndukaife, Justus C.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Optofluidics is dedicated to achieving integrated control of particle and fluid motion, particularly on the micrometer scale, by utilizing light to direct fluid flow and particle motion. The field has seen significant growth recently, driven by the concerted efforts of researchers across various scientific disciplines, notably for its successful applications in biomedical science. In this review, we explore a range of optofluidic architectures developed over the past decade, with a primary focus on mechanisms for precise control of micro and nanoscale biological objects and their applications in sensing. Regarding nanoparticle manipulation, we delve into mechanisms based on optical nanotweezers using nanolocalized light fields and light-based hybrid effects with dramatically improved performance and capabilities. In the context of sensing, we emphasize those works that used optofluidics to aggregate molecules or particles to promote sensing and detection. Additionally, we highlight emerging research directions, encompassing both fundamental principles and practical applications in the field.
The decay of quantum D-branes
Creators: name: Ambjorn, Jan
name: Janik, Romuald A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the {\em quantum} decay of D0-branes in two-dimensional 0B string theory. The quantum nature of the branes provides a natural cut-off for the closed string emission rate. We find exact quantum mechanical wavefunctions for the decaying branes and show how one can include the effects of the Fermi sea for any string coupling (Fermi energy).
description: 15 pages, 2 figures
FARMERS CHOICE OF ADAPTATION STRATEGIES TO CLIMATE CHANGE AND VARIABILITY IN ARID REGION OF GHANA
Creators: name: ALHASSAN, Hamdiyah
name: KWAKWA, Paul Adjei
name: ADZAWLA, William
name: ALHASSAN, Hamdiyah
name: KWAKWA, Paul Adjei
name: ADZAWLA, William
Publisher: name: Unknown
Year: 2019
Subjects: subject: Agribusiness
subject: Consumer/Household Economics
subject: Farm Management
subject: Risk and Uncertainty
subject: Teaching/Communication/Extension/Profession
subject: Adaptation
subject: Climate change and variability
subject: Multinomial Logit Regression model

description: This study used multinomial logit regression to determine the factors that influence farmers’ choice of adaptation strategies to climate change and variability of farmers in Savelugu-Nanton district, Northern region of Ghana. A simple random sampling was used to select 180 farmers. The data was analysed using a Multinomial logit regression model. From the results, the level of climate change and variability awareness was high and the adaptation strategies identified were mixed cropping, change crop varieties, changing planting time/date, soil conservation techniques, increased irrigation, increased female livestock herd, and seasonal migration. Farmers confirmed empirically observations that climate change would lead to a reduction in crop production. Also, gender, age, education, household size, farming experience, access to extension, access to credit, access to mobile phone and perceived decreased rainfall influenced farmers’ choices of a particular adaptation strategy. The findings support and justified calls for education of farmers on climate change and variability.
description: 10.15414/raae.2019.22.01.32-40 https://roaae.org/wp-content/uploads/RAAE_1_2019_Alhassan_et_al.pdf
IMPACT OF AGRICULTURAL PROTECTION ON AGRICULTURAL GROWTH IN NIGERIA: POLITICAL ECONOMY PERSPECTIVE (1980-2016)
Creators: name: OMEJE, Ejiofor Emmanuel
name: ARENE, Chukwuemeka John
name: OKPUKPARA, Chiedozie Benjamin
name: OMEJE, Ejiofor Emmanuel
name: ARENE, Chukwuemeka John
name: OKPUKPARA, Chiedozie Benjamin
Publisher: name: Unknown
Year: 2019
Subjects: subject: Agricultural and Food Policy
subject: Political Economy
subject: agricultural protection
subject: agricultural growth
subject: agricultural budget
subject: political economy

description: This study examined the impact of agricultural protection and other macroeconomic variables on agricultural growth in Nigeria from 1980 to 2016. The specific objectives were to (i) estimate the level of agricultural protection in Nigeria; (ii) determine the effects of agricultural protection on agricultural growth, and (iii) analyse the causal relationship between agricultural protection and agricultural growth in Nigeria. The data were obtained from annual time series dataset from Central Bank of Nigeria (CBN), World Bank, and Food and Agriculture Organisation (FAO) and were tested using unit root and cointegration tests. Descriptive statistics, Nominal Protection Coefficient (NPC) model, multiple regression and Granger causality were analytical test used, while the hypotheses were tested with F-test. Results revealed a significant presence of protection in the agricultural sector but not statistically commensurate with the share of agriculture to Nigeria's gross domestic product, (GDP). All hypotheses were tested at 1% probability level, i.e. p < 0.01. There was a negative significant relationship between agricultural growth and protection in agriculture. A significant and positive relationship exists between agricultural growth and budgetary appropriation to the agricultural sector, while foreign direct investment and farmers' economic welfare had a non-significant and negative relationship with protection level. There was significant causality running from budgetary appropriation (agriculture) to agricultural protection and from protection level to GDP (agriculture). One of the major recommendations is that government should review its policy instruments, programmes, and projects to ensure that targeted policy objectives such as increase in agricultural growth is achieved by increasing its budget and liberalizing the sector.
description: 10.15414/raae.2019.22.01.41-50 https://roaae.org/wp-content/uploads/RAAE_1_2019_Omeje_et_al.pdf
DISCOVERY OF MAIZE PRICE AND FOOD CROP MARKET DYNAMICS IN NIGERIA
Creators: name: AJIBADE, Toyin Benedict
name: AYINDE, Opeyemi Eyitayo
name: ABDOULAYE, Tahirou
name: AJIBADE, Toyin Benedict
name: AYINDE, Opeyemi Eyitayo
name: ABDOULAYE, Tahirou
Publisher: name: Unknown
Year: 2019
Subjects: subject: Agribusiness
subject: Demand and Price Analysis
subject: Marketing
subject: FOS: Economics and business
subject: Agricultural Markets
subject: Food crop
subject: Impulse response function
subject: Price discovery
subject: Variance decomposition

description: Having the mandate of achieving food security in Nigeria, commendable efforts have been geared towards food production in the nation. Albeit the increasing production, price volatility has continued to perpetuate in food markets in Nigeria hence attaining food affordability, a precondition for food security, remains a mirage. An innovative approach to the food challenge therefore, may be to understand the food markets dynamics such as to gain insight into how the market works. In this study we focus on maize, a very important staple in Nigeria. We seek to identify the point of price discovery and markets that significantly influence price of maize. In furtherance, we examine the dynamic relationship existing among the markets and explored the responsiveness of the markets to price signals from the other markets. Our results showed that most of the markets examined behave in such a manner expected of open market however full market integration has not been achieved. It was revealed that prices of maize are discovered from major food market in the deficit production zone. Majority of the markets were responsive to one-time price shock from itself, although exhibiting exogeneity in the contemporaneous period but becoming endogenous by the long run (whereby other markets majorly influenced prices) hence indicating that the markets had commendable informational influence on one another. The study therefore recommended installing infrastructure for linkage of production with the demand zones if price stabilization is to be achieved. Regulatory bodies should also check activities of cartels in the influential markets.
description: 10.15414/raae.2019.22.01.51-64 https://roaae.org/wp-content/uploads/RAAE_1_2019_Ajibade_et_al.pdf
Galaxy Zoo: Clump Scout -- Design and first application of a two-dimensional aggregation tool for citizen science
Creators: name: Dickinson, Hugh
name: Adams, Dominic
name: Mehta, Vihang
name: Scarlata, Claudia
name: Fortson, Lucy
name: Serjeant, Stephen
name: Krawczyk, Coleman
name: Kruk, Sandor
name: Lintott, Chris
name: Mantha, Kameswara
name: Simmons, Brooke D.
name: Walmsley, Mike
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Galaxy Zoo: Clump Scout is a web-based citizen science project designed to identify and spatially locate giant star forming clumps in galaxies that were imaged by the Sloan Digital Sky Survey Legacy Survey. We present a statistically driven software framework that is designed to aggregate two-dimensional annotations of clump locations provided by multiple independent Galaxy Zoo: Clump Scout volunteers and generate a consensus label that identifies the locations of probable clumps within each galaxy. The statistical model our framework is based on allows us to assign false-positive probabilities to each of the clumps we identify, to estimate the skill levels of each of the volunteers who contribute to Galaxy Zoo: Clump Scout and also to quantitatively assess the reliability of the consensus labels that are derived for each subject. We apply our framework to a dataset containing 3,561,454 two-dimensional points, which constitute 1,739,259 annotations of 85,286 distinct subjects provided by 20,999 volunteers. Using this dataset, we identify 128,100 potential clumps distributed among 44,126 galaxies. This dataset can be used to study the prevalence and demographics of giant star forming clumps in low-redshift galaxies. The code for our aggregation software framework is publicly available at: https://github.com/ou-astrophysics/BoxAggregator
description: 31 pages, 22 figures. Accepted for publication in Monthly Notices of the Royal Astronomical Society
Light-driven ultrafast phonomagnetism
Creators: name: Afanasiev, D.
name: Hortensius, J. R.
name: Ivanov, B. A.
name: Sasani, A.
name: Bousquet, E.
name: Blanter, Y. M.
name: Mikhaylovskiy, R. V.
name: Kimel, A. V.
name: Caviglia, A. D.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Exciting atomic oscillations with light is a powerful technique to control the electronic properties of materials, leading to remarkable phenomena such as light-induced superconductivity and ultrafast insulator to metal transitions. Here we show that light-driven lattice vibrations can be utilised to encode efficiently spin information in a magnetic medium. Intense mid-infrared electric field pulses, tuned to resonance with a vibrational normal mode of antiferromagnetic DyFeO3, drive the emergence of long-living weak ferromagnetic order. Light-driven phonon displacements promptly lower the energy barrier separating competing magnetic states, allowing the alignment of spins to occur within a few picoseconds, via non-equilibrium dynamics of the magnetic energy landscape.
description: 36 pages 25 figures
Additional file 2 of Machine learning analysis of exome trios to contrast the genomic architecture of autism and schizophrenia
Creators: name: Sardaar, Sameer
name: Qi, Bill
name: Dionne-Laporte, Alexandre
name: Guy. Rouleau
name: Reihaneh Rabbany
name: Trakadis, Yannis
Publisher: name: figshare
Year: 2020
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Developmental Biology
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: Computational Biology

description: Additional file 2: Supplemental Figure 1. Network plot of significant Gene Ontology biological processes for ASD. Supplemental Figure 2. Network plot of significant Gene Ontology biological processes for SCZ.
Some Properties of the Distance Function and a Conjecture of De Giorgi
Creators: name: Eminenti, Manolo
name: Mantegazza, Carlo
Publisher: name: arXiv
Year: 2003
Subjects: subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 53A07; 53A55

description: We analyse the geometric properties of the high derivatives of the distance function from a submanifold of the Euclidean space. In particular, we show some relations with the second fundamental form and its covariant derivatives of independent interest. As an application we prove a conjecture of Ennio De Giorgi on the evolution of submanifolds of the Euclidean space by the gradient of functionals depending on the derivatives of the distance function.
Superbubbles as an Empirical Characteristic of Directed Networks
Creators: name: Gärtner, Fabian
name: Kühnl, Felix
name: Seemann, Carsten R.
name: Graphs, The Students of the
name: 2018/19, Networks Computer Lab
name: Siederdissen, Christian Höner zu
name: Stadler, Peter F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Superbubbles are acyclic induced subgraphs of a digraph with single entrance and exit that naturally arise in the context of genome assembly and the analysis of genome alignments in computational biology. These structures can be computed in linear time and are confined to non-symmetric digraphs. We demonstrate empirically that graph parameters derived from superbubbles provide a convenient means of distinguishing different classes of real-world graphical models, while being largely unrelated to simple, commonly used parameters.
Multiliteracies in adult english as a second language programs
Creators: name: Newton, Andrew
Publisher: name: The University of British Columbia
Year: 2017

description: Over the last number of years there has been a growing recognition of important changes in the way that literacy is used and understood. These changes are attributed to increased flows of immigration around the globe that have resulted in more diverse populations, and the massive increase in use and accessibility of Internet and Communication Technology (lCT), principally internet based multimedia. Multiliteracies was the term given to these changes by the New London Group in 1996. Since that time much has been written on the topic and many case studies have documented its use in a wide range of programs, ages, and contexts. There is evidence, however, that educational programs continue to lag behind in recognizing and implementing these changes in substantive form, or struggle with how to bridge the gap between the old print literacy standards of reading and writing based assignments and assessments- and those of multiliteracies. The goal in this study was to examine in what ways multiliteracies-based pedagogies have been applied in the area of adult English as a second language education. In addition to presenting case studies from this teaching context, various case studies involving different ages and contexts are presented with the hypothesis that many of their findings are relevant and applicable to the practice of multiliteracies in the adult ESL context. Lastly, the findings of a study involving an original questionnaire on policies, beliefs and practices in the adult ESL classroom are presented. It is hoped that these findings will contribute to the research base on multiliteracies practices in this teaching context. By sharing these results with professionals in this educational sector the author hopes to raise awareness of multiliteracies and their potential to contribute to the theory and teaching practices that are used in adult ESL programs.
COVID-19 E A REDE HOTELEIRA CARIOCA: UMA ANÁLISE DOS IMPACTOS
Creators: name: Melo, Thadeu
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 350801
subject: Impacts of tourism
classificationCode: 380116
subject: Tourism economics
classificationCode: 440713
subject: Tourism policy

description: Este estudo exploratório analisou o impacto da pandemia de COVID-19 no setor hoteleiro do Rio de Janeiro, um dos principais destinos turísticos do Brasil, por meio de uma abordagem qualitativa e quantitativa de dados históricos e atuais. A pesquisa examinou indicadores-chave como taxa de ocupação, diária média e receita por quarto disponível, revelando a capacidade do setor de se adaptar e reestruturar suas atividades para mitigar os efeitos da crise. Os resultados destacam a importância de um ambiente estável e do setor de eventos para a recuperação e melhoria do desempenho dos indicadores hoteleiros, demonstrando a resiliência do setor turístico frente a desafios globais.
Supplemental Material for Stepchenkova et al., 2021
Creators: name: Stepchenkova, Elena I.
name: Zhuk, Anna S.
name: Cui, Jian
name: Tarakhovskaya, Elena R.
name: Barbari, Stephanie R.
name: Shcherbakova, Polina V.
name: Polev, Dmitrii E.
name: Fedorov, Roman
name: Poliakov, Eugenia
name: Rogozin, Igor B.
name: Lada, Artem G.
name: Pavlov, Youri I
Publisher: name: GSA Journals
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: 60408 Genomics
subject: Molecular Biology

description: Supplemental materials include 11 Suppl figures - pdf-files,6 Suppl Tables, 4 pdf and 2 excel files Suppl Results, 2 pdf files.Supplemental Results 1. Problems with the construction of haploid yeast strains with DNA polymerase alleles reducing fitness.Supplemental Results 2. Estimation of the probabilities of recurrent mutations in the same gene. Supplemental Table 1. Mutator effect of pol2rc-ΔN is reduced 60% in strain without the catalytic subunit of pol ζ, Rev3.Supplemental Table 2. Differences in mutant frequencies with or without UV-light irradiation in pol2rc-ΔN vs. wild-type strains.Supplemental Table 3. The pol2rc-ΔN elevated chromosome instability.Supplemental Table 4. (Excel file) Summary of mutations found in the course of genomic sequencing of the pol2rc-ΔN segregants.Supplementary Table 5. (Excel file) Ancestry of mutations in independent clones of the pol2rc-ΔNsegregants.Supplemental Table 6. Types of mutations found in genomes of pol2rc-ΔΝ strains. Supplemental Figure 1. Creation of haploid pol2rc-ΔN strains.Supplemental Figure 2. The absence of DPB4 does not affect the slow growth phenotype of pol2-ΔNmutants.Supplemental Figure 3. Outline of genetic analysis of diploids double heterozygous for the complete deletion of POL2 gene and pol2rc-ΔN.Supplemental Figure 4. Peculiarities in the genomic regions of pol2rc-ΔN strains relevant to the construction method.Supplemental Figure 5. High proportion of cells with abnormal morphology and nuclear material in pol2rc-ΔN cells.Supplemental Figure 6. Strains with pol2rc-ΔN grow slower than wild-type but are not temperature-sensitive or cold-sensitive.Supplemental Figure 7. Higher proportion of dead methylene blue-stained cells in cultures of pol2rc-ΔN strains in comparison to wild-type strains.Supplemental Figure 8. Many cells with pol2rc-ΔN have difficulty to start dividing. Supplemental Figure 9. Schematic of analysis to find if single cdc28 mutations can confer a growth advantage to pol2rc-ΔN strains.Supplementary Figure 10. Rescue of growth defects and sensitivity to drugs of pol2rc-ΔN by cdc28 mutations. Supplementary Figure 11. Multiple alignment of CMGC/CDK/CDC2 protein kinase orthologs.
Training initiatives in Mexico on Heritage Science: A convergent approach with national institutions
Creators: name: Ruvalcaba-Sil, Jose Luis
Publisher: name: Zenodo
Year: 2022
Subjects: training, heritage science, Mexico

description: The talk was given at the workshop on "Transatlantic Cooperation in Heritage Science", Cooperation theme 1: Training and Dissemination, held virtually on 6th October 2021.
description: This document reflects only the author(s)'s view and the Agency and the European Commission is not responsible for any use that may be made of the information it contains
ECONOMIC EFFICIENCY OF SMALLHOLDER FARMERS IN WHEAT PRODUCTION: THE CASE OF ABUNA GINDEBERET DISTRICT, WESTERN ETHIOPIA
Creators: name: ASFAW, Milkessa
name: GETA, Endrias
name: MITIKU, Fikadu
name: ASFAW, Milkessa
name: GETA, Endrias
name: MITIKU, Fikadu
Publisher: name: Unknown
Year: 2019
Subjects: subject: Consumer/Household Economics
subject: Farm Management
subject: Production Economics
subject: economic efficiency
subject: Ethiopia
subject: smallholder
subject: stochastic frontier

description: Yield enhancement through increasing efficiency in cereal production in general and in wheat production in particular could be an important way towards achieving food security. This study was aimed at estimating the levels of technical, allocative and economic efficiencies of smallholder wheat producers; and to identify factors affecting efficiency of smallholder farmers in wheat production. A two stages sampling technique was used to select 152 sample farmers to collect primary data pertaining of 2016/17 production year. Both primary and secondary data sources were used for this study. Stochastic production frontier approach and two limit Tobit model was employed. The stochastic production frontier model indicated that input variables such as mineral fertilizers, land and seed were the significant inputs to increase the quantity of wheat output. The estimated mean values of technical, allocative and economic efficiency were 78, 80 and 63% respectively, which indicate the presence of inefficiency in wheat production in the study area. A two-limit Tobit model result indicated that technical efficiency positively and significantly affected by sex of the household head, education, extension contact, off/non-farm activity and soil fertility but negatively affected by land fragmentation. Similarly, age, education, extension contacts and off/non-farm activity positively and significantly affected allocative efficiency. In addition, economic efficiency positively and significantly affected by sex, age, education, extension contact, off/non-farm activity and soil fertility. The policy measures derived from the results include: expansion of education, strengthening the existing extension services, establish and/or strengthening the existing off/non-farm activities and strengthening soil conservation practices in the study area.
description: 10.15414/raae.2019.22.01.65-75 https://roaae.org/wp-content/uploads/RAAE_1_2019_Asfaw_et_al.pdf
Twin peaks kHz QPOs: mathematics of the 3:2 orbital resonance
Creators: name: Rebusco, Paola
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using the method of multiple scales, one can derive an analytic solution that describes the behaviour of weakly coupled, non-linear oscillations in nearly Keplerian discs around neutron stars or black holes close to the 3:2 orbital epicyclic resonance. The solution obtained agrees with the previous numerical simulation. Such result may be relevant to the kilohertz quasi-periodic variability in X-ray fluxes observed in many Galactic black hole and neutron star sources. With a particular choice of tunable parameters, the solution fits accurately the observational data for Sco X-1.
description: Published (25 June 2004) on PASJ, 56, 553
Residual Neural Networks for the Prediction of Planetary Collision Outcomes
Creators: name: Winter, Philip M.
name: Burger, Christoph
name: Lehner, Sebastian
name: Kofler, Johannes
name: Maindl, Thomas I.
name: Schäfer, Christoph M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: E.1; I.6.6; I.2.0
subject: 70F16

description: Fast and accurate treatment of collisions in the context of modern N-body planet formation simulations remains a challenging task due to inherently complex collision processes. We aim to tackle this problem with machine learning (ML), in particular via residual neural networks. Our model is motivated by the underlying physical processes of the data-generating process and allows for flexible prediction of post-collision states. We demonstrate that our model outperforms commonly used collision handling methods such as perfect inelastic merging and feed-forward neural networks in both prediction accuracy and out-of-distribution generalization. Our model outperforms the current state of the art in 20/24 experiments. We provide a dataset that consists of 10164 Smooth Particle Hydrodynamics (SPH) simulations of pairwise planetary collisions. The dataset is specifically suited for ML research to improve computational aspects for collision treatment and for studying planetary collisions in general. We formulate the ML task as a multi-task regression problem, allowing simple, yet efficient training of ML models for collision treatment in an end-to-end manner. Our models can be easily integrated into existing N-body frameworks and can be used within our chosen parameter space of initial conditions, i.e. where similar-sized collisions during late-stage terrestrial planet formation typically occur.
description: 13 pages, 7 figures, 7 tables
Photonic crystal polarizers and polarizing beam splitters
Creators: name: Solli, D. R.
name: McCormick, C. F.
name: Chiao, R. Y.
name: Hickmann, J. M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We have experimentally demonstrated polarizers and polarizing beam splitters based on microwave-scale two-dimensional photonic crystals. Using polarized microwaves within certain frequency bands, we have observed a squared-sinusoid (Malus) transmission law when using the photonic crystal as a polarizer. The photonic crystal also functions as a polarizing beamsplitter; in this configuration it can be engineered to split incident polarizations in either order, making it more versatile than conventional, Brewster-angle beamsplitters.
description: 7 pages, 3 figures, published Journal Applied Physics 93, 9429 (2003)
Closed Algebras for Higher Rank, non-Abelian Tensor Gauge Fields
Creators: name: Konitopoulos, Spyros
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A systematic method is presented for the construction and classification of algebras of gauge transformations for arbitrary high rank tensor gauge fields. For every tensor gauge field of a given rank, the gauge transformation will be stated, in a generic way, via an ansatz that contains all the possible terms, with arbitrary coefficients and the maximum number of tensor gauge functions. The requirement for the closure of the algebra will prove to be restrictive, but, nevertheless, leave a variety of choices. Properly adjusting the values of the initial coefficients and imposing restrictions on the gauge functions, one can, one the one hand, recover all the, so far, analysed algebras and on the other, construct new ones. The presentation of a brand new algebra for tensor gauge transformations is the central result of this article.
description: 24 pages
Large scale cosmic-ray anisotropy with KASCADE
Creators: name: Antoni, T.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The results of an analysis of the large scale anisotropy of cosmic rays in the PeV range are presented. The Rayleigh formalism is applied to the right ascension distribution of extensive air showers measured by the KASCADE experiment.The data set contains about 10^8 extensive air showers in the energy range from 0.7 to 6 PeV. No hints for anisotropy are visible in the right ascension distributions in this energy range. This accounts for all showers as well as for subsets containing showers induced by predominantly light respectively heavy primary particles. Upper flux limits for Rayleigh amplitudes are determined to be between 10^-3 at 0.7 PeV and 10^-2 at 6 PeV primary energy.
description: accepted by The Astrophysical Journal
Best Practice Guide - Modern Accelerators
Creators: name: Bispo, João
name: Barbosa, Jorge G.
name: Silva, Pedro Filipe
name: Morales, Cristian
name: Myllykoski, Mirko
name: Ojeda-May, Pedro
name: Milosz Bialczak
name: Uchronski, Mariusz
name: Wlodarczyk, Adam
name: Wauligmann, Peter
name: Ezhilmathi Krishnasamy
name: Varrette, Sebastien
name: Lührs, Sebastian
name: Shoukourian, Hayk
Publisher: name: Zenodo
Year: 2021
Subjects: Best Practice Guide
HPC
Accelerators

description: Hardware accelerators are special types of elements designed for boosting the performance of certain application regions requiring large amounts of numerical computations. Several factors contributed to broadening the use and furthering the adoption of these technologies in High-Performance Computing (HPC). One of such is the offered greater computational throughput as compared to stand-alone Central Processing Units (CPUs), which is driven by the highly parallel architectural design of accelerators. This is particularly important in the current era of ever-increasing computational demands featuring high reuse rates of compute-intensive operational patterns. Another contributing factor is that these specialized chips are also capable of delivering much higher compute performance as compared to CPUs under the same power budget, making these technologies even more appealing for system vendors and users. All these led HPC manufacturers and integrators to unleash further the potential of hardware accelerators for delivering the required compute performance more efficiently. In fact, this is one of the main reasons that the current Top500 list continues to be enriched with various accelerated systems.
Modeling the time variable spectral energy distribution of the blazar CTA 102 from 2008 to 2022
Creators: name: Sahakyan, N.
name: Israyelyan, D.
name: Harutyunyan, G.
name: Gasparyan, S.
name: Vardanyan, V.
name: Khachatryan, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present long-term multiwavelength observations of blazar CTA 102 ($z=1.037$). Detailed temporal and spectral analyses of $γ$-ray, X-ray and UV/optical data observed by {\it Fermi}-LAT, Swift XRT, NuSTAR and Swift-UVOT over a period of 14 years, between August 2008 and March 2022, was performed. We found strong variability of source emission in all the considered bands, especially in the $γ$-ray band it exhibited extreme outbursts when the flux crossed the level of $10^{-5}\:{\rm photon\:cm^{-2}\:s^{-1}}$. Using the Bayesian Blocks algorithm, we split the adaptively binned $γ$-ray light curve into 347 intervals of quiescent and flaring episodes and for each period built corresponding multiwavelength spectral energy distributions (SEDs), using the available data. Among the considered SEDs, 117 high-quality (quasi) contemporaneous SEDs which have sufficient multiwavelength data, were modeled using JetSeT framework within a one-zone leptonic synchrotron and inverse Compton emission scenario assuming the emitting region is within the broad-line-region and considering internal and external seed photons for the inverse Compton up-scattering. As a result of modeling, the characteristics of the relativistic electron distribution in the jet as well as jet properties are retrieved and their variation in time is investigated. The applied model can adequately explain the assembled SEDs and the modelling shows that the data in the bright flaring periods can be reproduced for high Doppler boosting and magnetic field. The obtained results are discussed in the context of particle cooling in the emitting region.
description: Accepted for publication in MNRAS; doi.org/10.1093/mnras/stac2875
DAVLAT QARZI VA UNING XALQARO INVESTITSIYALARGA TA'SIRI
Creators: name: Alixonov, Ro'zali
Publisher: name: Zenodo
Year: 2024

description: Ushbu tadqiqotda xalqaro moliyaviy tashkilotlar (IMF, Jahon banki) va milliy statistika qo‘mitalari tomonidan taqdim etilgan 2021-2023-yillar uchun eng so‘nggi ma’lumotlardan foydalanildi.
Additional file 1 of Bioactivity evaluations of leaf extract fractions from young barley grass and correlation with their phytochemical profiles
Creators: name: Mamata Panthi
name: Romit Subba
name: Bechan Raut
name: Dharma Khanal
name: Niranjan Koirala
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
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: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer
subject: Inorganic Chemistry
subject: Hematology
subject: Plant Biology

description: Additional file 1 : Figure S1. Chromatogram of various compounds in methanolic extract of BG based on GC-MS profile of Fig. 6. Table S1. Absorbance values of extracts in TPC determination. Table S2. Absorbance values of extracts in TFC determination. Table S3. Absorbance values of extracts and ascorbic acid in anti-oxidant activity determination. Table S4. Absorbance values of extracts and diclofenac in anti-Inflammatory activity determination. Table S5. Dead brine shrimp counts of extracts in Brine shrimp lethality assay.
A sharp version of Price's law for wave decay on asymptotically flat spacetimes
Creators: name: Hintz, Peter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary 58J50, Secondary 83C57, 35L05, 35C20

description: We prove Price's law with an explicit leading order term for solutions $ϕ(t,x)$ of the scalar wave equation on a class of stationary asymptotically flat $(3+1)$-dimensional spacetimes including subextremal Kerr black holes. Our precise asymptotics in the full forward causal cone imply in particular that $ϕ(t,x)=c t^{-3}+\mathcal O(t^{-4+})$ for bounded $|x|$, where $c\in\mathbb C$ is an explicit constant. This decay also holds along the event horizon on Kerr spacetimes and thus renders a result by Luk-Sbierski on the linear scalar instability of the Cauchy horizon unconditional. We moreover prove inverse quadratic decay of the radiation field, with explicit leading order term. We establish analogous results for scattering by stationary potentials with inverse cubic spatial decay. On the Schwarzschild spacetime, we prove pointwise $t^{-2 l-3}$ decay for waves with angular frequency at least $l$, and $t^{-2 l-4}$ decay for waves which are in addition initially static. This definitively settles Price's law for linear scalar waves in full generality. The heart of the proof is the analysis of the resolvent at low energies. Rather than constructing its Schwartz kernel explicitly, we proceed more directly using the geometric microlocal approach to the limiting absorption principle pioneered by Melrose and recently extended to the zero energy limit by Vasy.
description: 49 pages, 4 figures. v2: strengthened Price law decay on Schwarzschild spacetimes, allowing for sum over angular frequencies; added references
POLICY FOR PROVING ADOPTION AND PROFITABILITY OF IRRIGATION IN BENIN
Creators: name: NONVIDE, Gbêtondji Melaine Armel
name: NONVIDE, Gbêtondji Melaine Armel
Publisher: name: Unknown
Year: 2019
Subjects: subject: Agricultural and Food Policy
subject: Adoption
subject: Irrigation
subject: Policy
subject: Rice
subject: Benin

description: Majority of the irrigation schemes developed in Benin failed upon the withdrawal of foreign partners in 1980s, and these schemes were abandoned by farmers. The 2008 food crisis and the new challenge of climate change and variability have renewed Benin government interest to invest in irrigation development to achieve food security. This article explores the policies needed for such investments to be successful and improve adoption of irrigation and farmers’ profitability using a case study from the rice irrigation scheme of Malanville, Benin. Results indicate that irrigated rice farming is profitable in Benin. Furthermore, profitability is positively correlated with education, access to credit, extension services, soil quality, amount of fertilizer and herbicide applied, and ownership of mobile phone. Policy reforms needed to sustain the development of irrigation and to increase profits include the development of irrigation policy document, the reinforcement of institutional supports for farmers, and the improvement in the production practices.
description: 10.15414/raae.2019.22.01.76-82 https://roaae.org/wp-content/uploads/RAAE_1_2019_Nonvide.pdf
Additional file 1 of Machine learning analysis of exome trios to contrast the genomic architecture of autism and schizophrenia
Creators: name: Sardaar, Sameer
name: Qi, Bill
name: Dionne-Laporte, Alexandre
name: Guy. Rouleau
name: Reihaneh Rabbany
name: Trakadis, Yannis
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Developmental Biology
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Plant Biology

description: Additional file 1: Supplemental Table 1. Merged top 10 genes from the SNV-based model and top 10 genes from the gene-based model. Supplemental Table 2. Overlapping genes from the SNV-based model and the gene-based model. Supplemental Table 3. Cluster genes from gene clustering with SCZ patients. Supplemental Table 4. Cluster 2 genes from gene clustering with ASD patients.
Comment on "Spontaneous breaking of time-reversal symmetry in the pseudogap state of a high-T$_c$ superconductor"
Creators: name: Armitage, N. P.
name: Hu, Jiangping
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We argue that that in their recent experiment in which they claim to have found evidence for a time-reversal symmetry broken state, Kaminski et al. overlooked small temperature dependent changes in the superstructure of Bi2212. These subtle changes may manifest themselves by changing the final state configurations of the photoemission process and thus invalidate their ultimate conclusions.
description: Submitted as a comment Kaminski et al. Nature 416 610 (2002). This version with additional references
DOES HUMAN CAPITAL EXPLAIN FOOD INSECURITY STATUS OF RURAL HOUSEHOLDS OR VICE-VERSA?
Creators: name: Oluwakemi OBAYELU
name: Abimbola ADEPOJU
name: Olukemi OMIRIN
name: Oluwakemi OBAYELU
name: Abimbola ADEPOJU
name: Olukemi OMIRIN
Publisher: name: Unknown
Year: 2019
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Dietary diversity
subject: human capital
subject: bicausality
subject: rural Nigeria

description: Food security and human development are intricately linked and no meaningful progress can be sustained without an affiliated progress on the other. Fighting food insecurity therefore requires an increase in the level of human capital. However, food insecurity and low level of human capital development are major challenges among the rural milieu in Nigeria. The effect of human capital on food insecurity status among rural households in Nigeria was therefore investigated in this study. Principal Component Analysis was used to generate human capital index which comprised age, age squared, education, number of inactive days and body mass index of the household head. Household heads that had medium level of human capital were food secure. Human capital index, household size, being a male-headed household, membership of association, land ownership and access to extension significantly reduced food insecurity. Although human capital index had a negative effect on food insecurity, there was no bicausality between them.
description: 10.15414/raae.2019.22.01.91-97 https://roaae.org/wp-content/uploads/RAAE_1_2019_Obajelu_et_al.pdf
An extension of Fourier analysis for the n-torus in the magnetic field and its application to spectral analysis of the magnetic Laplacian
Creators: name: Sakamoto, Makoto
name: Tanimura, Shogo
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We solved the Schr{ö}dinger equation for a particle in a uniform magnetic field in the n-dimensional torus. We obtained a complete set of solutions for a broad class of problems; the torus T^n = R^n / Λ is defined as a quotient of the Euclidean space R^n by an arbitrary n-dimensional lattice Λ. The lattice is not necessary either cubic or rectangular. The magnetic field is also arbitrary. However, we restrict ourselves within potential-free problems; the Schr{ö}dinger operator is assumed to be the Laplace operator defined with the covariant derivative. We defined an algebra that characterizes the symmetry of the Laplacian and named it the magnetic algebra. We proved that the space of functions on which the Laplacian acts is an irreducible representation space of the magnetic algebra. In this sense the magnetic algebra completely characterizes the quantum mechanics in the magnetic torus. We developed a new method for Fourier analysis for the magnetic torus and used it to solve the eigenvalue problem of the Laplacian. All the eigenfunctions are given in explicit forms.
description: 32 pages, LaTeX, minor corrections are made
MARKET OUTLET CHOICE DECISION AND ITS EFFECT ON INCOME AND PRODUCTIVITY OF SMALLHOLDER VEGETABLE PRODUCERS IN LAKE TANA BASIN, ETHIOPIA
Creators: name: Marelign ADUGNA
name: Mengistu KETEMA
name: Degye GOSHU
name: Sisay DEBEBE
name: Marelign ADUGNA
name: Mengistu KETEMA
name: Degye GOSHU
name: Sisay DEBEBE
Publisher: name: Unknown
Year: 2019
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Food Security and Poverty
subject: Lake Tana basin
subject: Market outlet
subject: Multivariate probit
subject: Smallholder farmers
subject: Vegetable

description: One of the challenges of perishable vegetable production is selecting appropriate market outlets to deliver the produce fresh and earn better price. Various factors affect producers’ decision to choose among the alternative market outlets. This study was aimed to identify determinants of smallholder vegetable producers’ decision on market outlet choice and verify the existence of difference in productivity and income of households among different market outlets in Lake Tana basin, Ethiopia. Using primary data collected from a survey of 385 farmers in three districts located in Lake Tana basin, the study estimated multivariate probit model to explain the factors that influence market outlet choice of smallholder vegetable producers. F-statistics was sued to verify the effect of market outlets on productivity and income. The results show that those households choosing both farm gate and local market simultaneously are found at better level of productivity and income. Multivariate probit results show that buyers visit and age of household head simultaneously determined all market outlets decision of producers. Those households visited by buyers at farm or village were found more likely to choose farm gate and roadside market outlets and less likely to sell the produce at market place. The implication is that as far as smallholder producers had access to alternative market outlets, they would earn better income by choosing appropriate combination of market outlets. Interventions that improve access to all market outlets could improve income and boost production of vegetables.
description: 10.15414/raae.2019.22.01.83-90 https://roaae.org/wp-content/uploads/RAAE_1_2019_Adugna_et_al.pdf