cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
In situ observation of slow and tunnelling light at the cutoff wavelength of an optical fiber
Creators: name: Yang, Yong
name: Sumetsky, M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Slow waves and tunneling waves can meet at the cutoff wavelengths and/or transmission band edges of optical and quantum mechanical waveguides. The experimental investigation of this phenomenon, previously performed using various optical microstructures, is challenged by fabrication imperfections and material losses. Here, we demonstrate this phenomenon in situ for whispering gallery modes slowly propagating along a standard optical fiber, which possesses the record uniformity and exceptionally small transmission losses. Slow axial propagation dramatically increases the longitudinal wavelength of light and allows us to measure nanosecond-long tunneling times along tunable potential barriers having the width of hundreds of microns. This demonstration paves a simple and versatile way to investigate and employ the interplaying slow and tunneling light.
description: 4 pages, 3 figures
Some Non-Nested Hypothesis Tests and the Relations Among Them
Creators: name: Davidson, Russell
name: MacKinnon, James G.
name: Davidson, Russell
name: MacKinnon, James G.
Publisher: name: Unknown
Year: 1980
Subjects: Financial Economics

description: In this paper we discuss several statistical techniques which may be used to test the validity of a possibly nonlinear and multivariate regression model, using the information provided by estimating one or more alternative models on the same set of data. The first such techniques in econometrics were proposed by Pesaran (1974) and Pesaran and Deaton (1978) based on the work of Cox (1961, 1962). In Davidson and MacKinnon (1980), we recently proposed, for the univariate case, some new techniques which are conceptually and computationally simpler. The first major result of this paper is that the techniques we have proposed can be regarded as alternative implementations of Cox's basic idea for non-nested hypothesis testing; under the null hypothesis all of the test statistics are asymptotically the same random variable. A second major result is that, for the univariate linear regression case, our tests and Pesaran's test have asymptotic relative efficiency of unity for local alternatives. We then propose several generalizations of our procedures to the case of multivariate regression models, and show that one of these generalizations is asymptotically equivalent under the null hypothesis to the test proposed by Pesaran and Deaton. Finally, we present the results of a sampling experiment for univariate linear models which shows that the small-sample performance of our 3-test and Pesaran's test can be quite different.
Propositions, Principles and Methods: The Linear Hypothesis and Structural Change
Creators: name: Fisher, Gordon
name: Fisher, Gordon
Publisher: name: Unknown
Year: 1980
Subjects: Financial Economics
Public Economics

description: This paper seeks to distinguish between the principles upon which testing of statistical hypotheses may be based and the practical methods which these principles generate. Seber's (1964) conclusion, that the Wald, Lagrange Multiplier and Likelihood Ratio Principles all lead to exactly the same test statistic in the case of a linear hypothesis, is re-examined in the light of a strict interpretation of the principles. Simple relations between various test statistics and their distributions are outlined. These are then applied to two well-known methods of testing for structural change. It is found that the cusum of squares test using recursive residuals is based upon the Lagrange Multiplier Principle while the prediction interval (or Chow-) test is based upon the Wald Principle. Relations between these tests and some straightforward extensions are outlined.
Additional file 1 of Frameworks for health systems performance assessment: how comprehensive is Ghana’s holistic assessment tool?
Creators: name: Kumah, Emmanuel
name: Ankomah, Samuel
name: Fusheini, Adam
name: Sarpong, Emmanuel
name: Anyimadu, Eric
name: Ato Quist
name: Koomson, Brian
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Developmental Biology
subject: Science Policy

description: Additional file 1. An overview of Ghana’s Health System [51–56].
QCD Sum Rules Description of Nucleons in Asymmetric Nuclear Matter
Creators: name: Drukarev, E. G.
name: Ryskin, M. G.
name: Sadovnikova, V. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the nucleon parameters in isospin asymmetric nuclear matter using the QCD sum rules. The nucleon self-energies are expressed in terms of the in-medium values of QCD condensates. The simple approximate expressions for the self-energies are obtained in terms of these condensates. Relation between successive inclusion of the condensates and the meson-exchange picture of the nucleon interaction with medium is analyzed. The values of the self-energies and of the symmetry energy agree with those obtained by the methods of nuclear physics.
description: 40 pages, 6 figures
ANALISIS DE LA PARTICIPACIÓN DE LA MUJER COMO INTEGRANTE DE LA EMPRESA FAMILIAR EN LA TOMA DE DECISIONES EN LA REGIÓN CENTRO SUR DE TLAXCALA
Analysis of the participation of women as member of the family enterprise in decision making in the Central- South region of Tlaxcala
Creators: name: Flores, Edit Hernández
name: Cuahquentzi, Marcelo Paredes
name: Flores, Edit Hernández
name: Cuahquentzi, Marcelo Paredes
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Woman
subject: family business
subject: government bodies
subject: managerial positions

description: Although the participation of women in the workplace is increasing, inequality of opportunities is observed in relation to men. This phenomenon is evident in family businesses, specifically in government bodies and management positions. This article presents the results of a research carried out with family businesses in the central-south region of the State of Tlaxcala to identify and analyze the participation of women in decision making, the above with the application of a survey as an instrument to obtain the information under the type of transversality. Among the results, it was identified that a low percentage of family businesses have government bodies and that the participation of women is low, since the position of general director is held by a man in 63.0% of the cases.
description: ISSN-1405-9282
An introduction to noncommutative deformations of modules
Creators: name: Eriksen, Eivind
Publisher: name: arXiv
Year: 2003
Subjects: subject: Algebraic Geometry (math.AG)
subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 14D15; 14B12

description: This paper gives an elementary introduction to noncommutative deformations of modules. The main results of this deformation theory are due to Laudal. Let k be an algebraically closed (commutative) field, let A be an associative k-algebra, and let M = {M_1, ..., M_p} be a finite family of left A-modules. We study the simultaneous formal deformations of the family M, described by the noncommutative deformation functor Def(M): a(p) -> Sets introduced by Laudal. In particular, we prove that the deformation functor Def(M) has a pro-representing hull H(M), unique up to non-canonical isomorphism, and describe how to calculate H(M) using the Ext groups of the family M and their matric Massey products.
description: 33 pages, AMS-LaTeX, uses package Xy-pic, submitted to Noncommutative Geometry and Rings (Almeria 2002) conference proceedings
EXISTENCIA DE FASCIOLASIS OVINA Y CAPRINA QUE AFECTAN LA PRODUCCIÓN EN SAN JOSÉ CHIAPA, PUEBLA
Situation of ovine and caprine fasciolasis with productive impact in San José Chiapa, Puebla
Creators: name: Hernández, Jorge Ezequiel Hernández
name: Ronquillo, Julio Cesar Camacho
name: Castillo, José Del Carmen Rodríguez
name: Robles, José Manuel Robles
name: Castañeda, Elsa Lysbet Rodríguez
name: Hernández, Jorge Ezequiel Hernández
name: Ronquillo, Julio Cesar Camacho
name: Castillo, José Del Carmen Rodríguez
name: Robles, José Manuel Robles
name: Castañeda, Elsa Lysbet Rodríguez
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Parasites
subject: zoonosis
subject: production
subject: market
subject: small ruminants

description: Fasciolasis is a present disease that affects the health of sheep and goats, in addition it becomes a zoonosis of great consequences for the economic and productive losses in the herds of the whole world. In Mexico, it is found in almost all the states with a great impact on ovine and caprine production, caused by this parasitosis. The main objective of the study was to know the existence of fasciolasis in sheep and goats that affect production in San José Chiapa, Puebla. The study was carried out in the municipality of San José Chiapa, in the state of Puebla. Two groups of 60 (sheep and goats) of average age of two and a half years were selected, shepherding them from 8:00 a.m. to 4:00 p.m. Stool collection (120) was performed for the laboratory analysis and its parasite identification of the groups under study. The techniques performed were McMaster (for Eimerias and gastrointestinal nematodes) and concentration / sedimentation (for fasciolas), where descriptive statistics were later applied; Through the statistical package SPSS 10.0 for Windows. The results show a greater number of fasciolas with 17 sheep constituting 28% of the population affected, and in the goats only 7 by fasciolas representing 12% of its population. The decrease was less $140.00 / sheep on sale, for confiscation of liver affected by fasciolasis when marketed in the markets (local and regional).
description: ISSN-1405-9282
Protein secondary structure: Entropy, correlations and prediction
Creators: name: Crooks, Gavin E.
name: Brenner, Steven E.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: Is protein secondary structure primarily determined by local interactions between residues closely spaced along the amino acid backbone, or by non-local tertiary interactions? To answer this question we have measured the entropy densities of primary structure and secondary structure sequences, and the local inter-sequence mutual information density. We find that the important inter-sequence interactions are short ranged, that correlations between neighboring amino acids are essentially uninformative, and that only 1/4 of the total information needed to determine the secondary structure is available from local inter-sequence correlations. Since the remaining information must come from non-local interactions, this observation supports the view that the majority of most proteins fold via a cooperative process where secondary and tertiary structure form concurrently. To provide a more direct comparison to existing secondary structure prediction methods, we construct a simple hidden Markov model (HMM) of the sequences. This HMM achieves a prediction accuracy comparable to other single sequence secondary structure prediction algorithms, and can extract almost all of the inter-sequence mutual information. This suggests that these algorithms are almost optimal, and that we should not expect a dramatic improvement in prediction accuracy. However, local correlations between secondary and primary structure are probably of under-appreciated importance in many tertiary structure prediction methods, such as threading.
description: 8 pages, 5 figures
Additional file 1 of Arterial CO2 pressure changes during hypercapnia are associated with changes in brain parenchymal volume
Creators: name: Kleij, Lisa
name: Vis, Jill
name: Bresser, Jeroen
name: Hendrikse, Jeroen
name: Siero, Jeroen
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Computational Biology

description: Additional file 1: Figure S1. Hypercapnia challenge (EtCO2 on y-axis) and timing of 3DT1-weighted sequence acquisition for Subject 7.
Two Papers on Linear Models
Creators: name: Fisher, Gordon
name: Gregory, Allan W.
name: McAleer, Michael
name: Fisher, Gordon
name: Gregory, Allan W.
name: McAleer, Michael
Publisher: name: Unknown
Year: 1980
Subjects: Demand and Price Analysis
Financial Economics

description: When coefficients of endogenous variables are known, it is demonstrated that two-stage least squares and instrumental variable estimators are invariant to the form in which these variables enter computations, as raw data or estimates. Exclusion of instruments and knowledge of coefficients are related to identifiability testing, and a test presented. -- This paper discusses the traditional specification problem from a geometric viewpoint. While the traditional emphasis is on the properties of estimators, the geometric approach also allows an easy development of corresponding results for inference. Errors arising from artificial inclusion or exclusion of variables are considered in terms of augmentations or restrictions on a given maintained hypothesis, and this allows a corresponding interpretation of tests based upon the Wald and Lagrange Multiplier Principles. It is demonstrated that biases arising from incorrect exclusion of variables do not invalidate the traditional F-test.
Orchesia (Orchestera) turkini Alekseev & Bukejs 2012
Creators: name: Alekseev, Vitalii I.
name: Bukejs, Andris
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Melandryinae
Orchesia
Orchesia turkini

description: Orchesia (Orchestera) turkini Alekseev & Bukejs, 2012
Material examined. One specimen with the collection number 1799-4 [CCHH], Baltic amber, Yantarny, Kaliningrad Region, Russia. Body length of the beetle is 3.6 mm. Syninclusions are absent.
description: Published as part of Alekseev, Vitalii I. & Bukejs, Andris, 2015, A new species of the genus Orchesia Latreille (Coleoptera: Melandryidae) from Baltic amber with a key to species described from fossil resins, pp. 590-596 in Zootaxa 3947 (4) on page 593, DOI: 10.11646/zootaxa.3947.4.10, http://zenodo.org/record/232889
Neutrino cosmology - an update
Creators: name: Hannestad, Steen
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Present cosmological observations yield an upper bound on the neutrino mass which is significantly stronger than laboratory bounds. However, the exact value of the cosmological bound is model dependent and therefore less robust. Here, I review the current status of cosmological neutrino mass bounds and also discuss implications for sterile neutrinos and LSND in particular.
description: Invited talk at Thinking, observing, and mining the universe, Sorrento, Italy (22-27 September 2003)
The $W$-curvature tensor on relativistic space-times
Creators: name: Abu-donia, H. M.
name: Shenawy, Sameh
name: Syied, A. A.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: This paper aims to study the $W$-curvature tensor on relativistic space-times. The energy-momentum tensor T of a space-time is semi-symmetric given that the $W$-curvature tensor is semi-symmetric whereas energy-momentum tensor T of a space-time having a divergence free $W$-curvature tensor is of Codazzi type. A space-time having a traceless $W$-curvature tensor is Einstein. A $W$-curvature flat space-time is Einstein. Perfect fluid space-times which admits $W$-curvature tensor are considered.
Andrena fulvago
Creators: name: Gérard, Maxence
name: Fiordaliso, William
name: Ferrais, Louise
name: Fournier, Chloé
name: Hairault, Malo
name: Lheureux, Lise
name: Rosa, Paolo
name: Ghisbain, Guillaume
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Andrenidae
Andrena
Andrena fulvago

description: Andrena fulvago (Christ, 1791)
Conservation status
NT
description: Published as part of Gérard, Maxence, Fiordaliso, William, Ferrais, Louise, Fournier, Chloé, Hairault, Malo, Lheureux, Lise, Rosa, Paolo & Ghisbain, Guillaume, 2025, Wild bee diversity of the National Park of the Semois Valley (Belgium), pp. e 144223 in Biodiversity Data Journal 13 on page e144223, DOI: 10.3897/BDJ.13.e144223
Andrena helvola
Creators: name: Gérard, Maxence
name: Fiordaliso, William
name: Ferrais, Louise
name: Fournier, Chloé
name: Hairault, Malo
name: Lheureux, Lise
name: Rosa, Paolo
name: Ghisbain, Guillaume
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Andrenidae
Andrena
Andrena helvola

description: Andrena helvola (Linnaeus, 1758)
Conservation status
VU
description: Published as part of Gérard, Maxence, Fiordaliso, William, Ferrais, Louise, Fournier, Chloé, Hairault, Malo, Lheureux, Lise, Rosa, Paolo & Ghisbain, Guillaume, 2025, Wild bee diversity of the National Park of the Semois Valley (Belgium), pp. e 144223 in Biodiversity Data Journal 13 on page e144223, DOI: 10.3897/BDJ.13.e144223
Bombus lapidarius
Creators: name: Gérard, Maxence
name: Fiordaliso, William
name: Ferrais, Louise
name: Fournier, Chloé
name: Hairault, Malo
name: Lheureux, Lise
name: Rosa, Paolo
name: Ghisbain, Guillaume
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Apidae
Bombus
Bombus lapidarius

description: Bombus lapidarius (Linnaeus, 1758)
Conservation status
LC
description: Published as part of Gérard, Maxence, Fiordaliso, William, Ferrais, Louise, Fournier, Chloé, Hairault, Malo, Lheureux, Lise, Rosa, Paolo & Ghisbain, Guillaume, 2025, Wild bee diversity of the National Park of the Semois Valley (Belgium), pp. e 144223 in Biodiversity Data Journal 13 on page e144223, DOI: 10.3897/BDJ.13.e144223
Redesign of 16th Avenue / SW Marine Drive Intersection Detailed Design Report
Creators: name: Cho, Gabriel
name: Prasad, Sivan
name: Song, Kevin
name: Ng, Spencer
name: Louie, Sean
name: Kao, Wesley
name: Bhanote, Shivek
Publisher: name: The University of British Columbia
Year: 2024

description: The intersection of Southwest Marine Drive (SW Marine Dr.) at 16th Avenue (16th Ave.) is a major car-oriented entry gateway to the University of British Columbia (UBC). Due to the rapid development of residential buildings nearby, the necessity of an intersection redesign has been further emphasized as a result of the increase in active transportation. The original intersection was not capable of handling the active transportation of the time, let alone the increased volume of today and the future. The objectives for this redesign are as follows: - Prioritize the safety of active modes of transportation, - Reduce the speeds of motor vehicles entering the intersection, - Minimize land usage requirements while not encroaching on preoccupied property, - Effectively retain stormwater on site, - Act as an entry gateway to welcome travelers to the campus. Our team followed relevant codes and standards in the geometric design of the intersection, analyzing it in SIDRA based on traffic flow data collected during the PM peak hours of a regular weekday. AutoCAD, Civil 3D, and ArcGIS were used to develop drawings while Sketchup was used to develop 3D renders of the final design. The proposed intersection design features a 55 m diameter roundabout with a truck apron. The westbound right-turn slip lane was removed to maintain four lanes of traffic on each leg, with horizontal deflection on the northbound approach to calm traffic. The pedestrian crossing and crossride across 16th Ave. and the crossride across SW Marine Dr. at the north-end of the intersection are equipped with Rectangular Rapid Flashing Beacons (RRFBs). An underground stormwater detention tank and an entry gateway structure rests in the centre roundabout island. The cost of the project is estimated to be $6.7 million, with a construction start date of May 2024 and completion date in November 2024. For detailed design drawings, refer to Appendix A. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
CAMBIOS DE VEGETACION Y COSTOS ASOCIADOS CON EL CONTINUO SOBREPASTOREO DEL GANADO EN EL PASTIZAL MEDIANO ABIERTO DE CANANEA, SONORA, MÉXICO
Changes in vegetation and costs associated with continuous overgrazing of cattle in the Short Grass Prairies of Cananea, Sonora, Mexico
Creators: name: Flores, Fernando Ibarra
name: Rivera, Martha Martín
name: Medina, Salomón Moreno
name: Martín, Fernando Ibarra
name: López, Rafael Retes
name: Flores, Fernando Ibarra
name: Rivera, Martha Martín
name: Medina, Salomón Moreno
name: Martín, Fernando Ibarra
name: López, Rafael Retes
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Cattle raising
subject: short grass prairie
subject: mesquite invasion
subject: rehabilitation, profitability

description: Short Grass Prairies are very important ecosystems for society because they offer many services that impact production and well-being of the people. The continuous overgrazing in this community has reduced the density and cover of grasses and increased the density and coverage of mesquite, reducing the production potential and transforming the condition of the pasture from good to poor. An economic analysis was carried out to evaluate the profitability of a ranch with Short Grass Prairies in poor condition (SGPPC), compared to a ranch with Short Grass Prairies in good condition (SGPGC) and an option that includes the planting of buffel grass (Cenchrus ciliaris L.) (PBG). Three ranches of 1,000 ha were considered, similar in management, two of which, one was in good condition and the other in poor condition, work according to their current production capacity. In the other option, the pasture was improved annually by planting 200 ha of buffel. A financial program with a 14-year projection was used. In all cases, real costs were calculated. The results show that the average annual economic yield in the SGPPC varied from $ 1.51 to $ 6.92 pesos/ha and in the SGPGC it varied from $72.60 to $137.86 pesos/ha and both remained relatively stable during the 14 years. The profitability in SZB was negative during the first five years, until the investment of range seeding and cattle was paid, and until the seventh year, it reached the point of stabilization. The average annual economic yield in the rehabilitated ranch was $274.80 pesos/ha, and it was 64.2 and 3.2 times higher than the ranch with Short Grass Prairie in poor and good condition, respectively. We conclude that continuous overgrazing causes severe changes in vegetation and reduces the productivity and condition of pastures. It is not economically feasible to overgraze Short Grass Prairies because yields are reduced and over time are economically unsatisfactory to sustain a family. The planting of buffel grass is a good alternative to rehabilitate deteriorated pastures.
description: ISSN-1405-9282
The Synchrotron Radiation Research Center at Nagoya University
Creators: name: Chavas, Leonard
Publisher: name: Zenodo
Year: 2022

description: Since 2007, the Synchrotron Radiation Research Center at Nagoya University (NUSR) worked together with the Aichi Synchrotron Center (AichiSR) to operate the Aichi synchrotron source and provide an expert service to its users. As part of its activities, the NUSR participates in the daily actions of the AichiSR, but also has its own research projects, all of which related to synchrotron radiation and oriented toward user support. By providing a large set of expertise to academic and industrial users in terms of synchrotron light source, sample preparation and data analysis, members of the NUSR are experimenting at all Japanese x-ray sources and other international facilities. During the presentation, I would like to introduce to the audience this very peculiar, yet inspiring approach adopted by the NUSR, summarize 10 years of collaboration with the AichiSR, and present the objectives envisioned for the center in views of an evolving research community.
MATLAB scripts for "Real-time terahertz imaging with a single-pixel detector"
Creators: name: Stantchev, Rayko
name: Yu, Xiao
name: Blu, Thierry
name: Pickwell-MacPherson, Emma
Publisher: name: figshare
Year: 2020
Subjects: subject: 20501 Classical and Physical Optics
subject: FOS: Physical sciences

description: Supplementary MATLAB scripts for [Rayko Stantchev, Xiao Yu, Thierry Blu, Emma Pickwell-MacPherson, "Real-time Terahertz imaging with a single-pixel detector", Nature Communications, DOI: 10.1038/s41467-020-16370-x]
These files will be made available after publication (date of publication 21/May/2020).
Nucleosynthesis of "Light" Heavy Nuclei in Neutrino-driven Winds. Role of ($α,n$) reactions
Creators: name: Pereira, Jorge
name: Arcones, Almudena
name: Bliss, Julia
name: Montes, Fernando
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Neutrino-driven winds following core collapse supernovae have been proposed as a suitable site where the so-called light heavy elements (between Sr to Ag) can be synthetized. For moderately neutron-rich winds, ($α,n$) reactions play a critical role in the weak r process, becoming the main mechanism to drive nuclear matter towards heavier elements. In this paper we summarize the sensitivity of network-calculated abundances to the astrophysical conditions, and to uncertainties in the ($α,n$) reaction rates. A list of few ($α,n$) reactions were identified to dominate the uncertainty in the calculated elemental abundances. Measurements of these reactions will allow to identify the astrophysical conditions of the weak r process by comparing calculated/observed abundances in r-limited stars.
EL DESARROLLO TECNOLOGICO Y LA INNOVACIÓN COMO ENTE PRINCIPAL DE COMPETITIVIDAD EN LAS EMPRESAS DEL SECTOR AGROPECUARIO EN EL MUNICIPIO DE ANGOSTURA, SINALOA
Technological Development and Innovation as a Main Competitiveness in the Companies of the Agricultural Sector in the Municipality of Angostura, Sinaloa
Creators: name: Barreras, Imelda Zayas
name: Barreras, Imelda Zayas
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Innovation
subject: technological development
subject: technologies and agricultural sector

description: Technological development and innovation are related as a main entity of development and competitiveness of companies in the agricultural sector, where modern equipment and machinery have been created that involve information technologies for their use and management, and innovations in varieties have been obtained. of seeds that allow a greater production and resistance to pests allowing producers to benefit from the results in the yield of their production per hectare, reducing production costs and therefore improving their profits. The above allows producers to be more competitive in the market with the sale of their quality products, always looking to plant varieties of products where they can apply their innovations in technologies, which results in higher economic results. The development of technology in the municipality of Angostura, Sinaloa; it is observed that it has been on a smaller scale than other municipalities, that is why it is interesting to carry out this research to analyze the advances that have been made in innovation and technological development by the MSMEs of the Agricultural Sector; for this study, it was carried out under the qualitative, exploratory and descriptive research method, conducting interviews under the snowball technique; finding as results that the companies of the municipality if they have innovated in technologies, equipment and machinery, and have even participated in exhibitions and demonstrations the advances of technology, which has allowed them to apply in the short term new varieties of seeds, but this is not has seen in the development of companies.
description: ISSN-1405-9282
LA FERTILIZACION ORGANICA: UN ÁREA DE OPORTUNIDAD SUSTENTABLE PARA INCREMENTAR LOS RENDIMIENTOS FÍSICOS Y ECONOMICOS DE LA PRODUCCIÓN DE ALFALFA (Medicago sativa L)
Organic Fertilization: An Area of Sustainable Opportunity to Increase the Physical and Economic Performance in the Alfalfa Production (Medicago sativa L.)
Creators: name: Ávila-Cisneros, R
name: Rocha-Valdez J., L.
name: González-Torres A
name:  Ogaz A.R
name: González-Avalos, R.
name: Ávila-Cisneros, R
name: Rocha-Valdez J., L.
name: González-Torres A
name:  Ogaz A.R
name: González-Avalos, R.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Alfalfa
subject: organic fertilization
subject: vermicompost
subject: nutritive solution
subject: marginal utility

description: The paper that is presented below was carried out in the autumn - winter cycle of 2017 in the San Antonio de los Bravos experimental field of the UAAAN - UL, in Torreón Coahuila, Mexico. Under a randomized complete block method experiments designs; establishing 6 fertilization treatments with 5 repetitions each. These were as follows: 3 organic sources; vermicompost, leachate of vermicompost and hydroponic nutrient solution, 2 inorganic sources; MAP (phosphorus) and Magnesium Sulfate; and finally a control block in which no fertilizer was applied. It was an arrangement of 30 plots of 3 X 10 m = 30 m2 for each of the blocks. For the statistical analysis of the ANOVA, the Olivares software of FAUANL v.2012 was used for an α of 5%, and the marginal utility was analyzed by the Palencia method (2012). We took 3 variables to study these were: height of green forage plant, weight of green forage per m2, and the generation of % dry matter. The hypothesis proposed was that organic fertilization generates increases in the variables mentioned above. For the three measurement characteristics analyzed, no significant statistical difference was obtained, and in the analysis of the marginal utility it was the check control who generated a profit per hectare of $4,380 pesos, followed by the MAP inorganic source with $2,240 pesos; and finally, the source of organic fertilization that was the vermicompost leach with only $ 860 pesos of marginal profit per hectare. The proposed hypothesis is rejected and the new lines of research should be directed to reduce the doses of application of organic sources; because with those applied in this experiment, they punish production costs enough.
description: ISSN-1405-9282
A Fast and Robust Algorithm for Orientation Estimation using Inertial Sensors
Creators: name: Kok, Manon
name: Schön, Thomas B.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Signal Processing (eess.SP)
subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: We present a novel algorithm for online, real-time orientation estimation. Our algorithm integrates gyroscope data and corrects the resulting orientation estimate for integration drift using accelerometer and magnetometer data. This correction is computed, at each time instance, using a single gradient descent step with fixed step length. This fixed step length results in robustness against model errors, e.g. caused by large accelerations or by short-term magnetic field disturbances, which we numerically illustrate using Monte Carlo simulations. Our algorithm estimates a three-dimensional update to the orientation rather than the entire orientation itself. This reduces the computational complexity by approximately 1/3 with respect to the state of the art. It also improves the quality of the resulting estimates, specifically when the orientation corrections are large. We illustrate the efficacy of the algorithm using experimental data.
description: 9 pages, 2 figures
Equilibrium strategies in a multiregional transboundary pollution differential game with spatially distributed controls
Creators: name: de Frutos, Javier
name: López, Paula
name: Martín-Herrán, Guiomar
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We analyze a differential game with spatially distributed controls to study a multiregional transboundary pollution problem. The dynamics of the state variable (pollution stock) is defined by a two dimensional parabolic partial differential equation. The control variables (emissions) are spatially distributed variables. The model allows for a, possibly large, number of agents with predetermined geographical relationships. For a special functional form previously used in the literature of transboundary pollution dynamic games we analytically characterize the feedback Nash equilibrium. We show that at the equilibrium both the level and the location of emissions of each region depend on the particular geographical relationship among agents. We prove that, even in a simplified model, the geographical considerations can modify the players' optimal strategies and therefore, the spatial aspects of the model should not be overlooked.
Learning Accurate Integer Transformer Machine-Translation Models
Creators: name: Wu, Ephrem
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Computation and Language (cs.CL)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We describe a method for training accurate Transformer machine-translation models to run inference using 8-bit integer (INT8) hardware matrix multipliers, as opposed to the more costly single-precision floating-point (FP32) hardware. Unlike previous work, which converted only 85 Transformer matrix multiplications to INT8, leaving 48 out of 133 of them in FP32 because of unacceptable accuracy loss, we convert them all to INT8 without compromising accuracy. Tested on the newstest2014 English-to-German translation task, our INT8 Transformer Base and Transformer Big models yield BLEU scores that are 99.3% to 100% relative to those of the corresponding FP32 models. Our approach converts all matrix-multiplication tensors from an existing FP32 model into INT8 tensors by automatically making range-precision trade-offs during training. To demonstrate the robustness of this approach, we also include results from INT6 Transformer models.
Thermodynamic properties of ferromagnetic mixed-spin chain systems
Creators: name: Fukushima, Noboru
name: Honecker, Andreas
name: Wessel, Stefan
name: Brenig, Wolfram
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Using a combination of high-temperature series expansion, exact diagonalization and quantum Monte Carlo, we perform a complementary analysis of the thermodynamic properties of quasi-one-dimensional mixed-spin systems with alternating magnetic moments. In addition to explicit series expansions for small spin quantum numbers, we present an expansion that allows a direct evaluation of the series coefficients as a function of spin quantum numbers. Due to the presence of excitations of both acoustic and optical nature, the specific heat of a mixed-spin chain displays a double-peak-like structure, which is more pronounced for ferromagnetic than for antiferromagnetic intra-chain exchange. We link these results to an analytically solvable half-classical limit. Finally, we extend our series expansion to incorporate the single-ion anisotropies relevant for the molecular mixed-spin ferromagnetic chain material MnNi(NO$_{2}$)$_{4}$(ethylenediamine)$_{2}$, with alternating spins of magnitude 5/2 and 1. Including a weak inter-chain coupling, we show that the observed susceptibility allows for an excellent fit, and the extraction of microscopic exchange parameters.
description: 8 pages including 7 figures, submitted to Phys. Rev. B; series extended to 29th. QMC added
Analysis of eAGRI Web Portal Ergonomics And Presentation of Information in Terms of the General Public
Creators: name: Benda, P.
name: Šimek, P.
name: Masner, J.
name: Vaněk, J.
name: Benda, P.
name: Šimek, P.
name: Masner, J.
name: Vaněk, J.
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agricultural Finance
subject: Ergonomics
subject: Usability Analysis
subject: eAGRI portal
subject: Human-Computer Interface
subject: Five second test
subject: Thirty second test
subject: Heuristic evaluation
subject: First click test

description: The aim of the eAGRI portal is to inform not only professionals in the field of agriculture but also the general public about current events and news in the respective resort. Merit of the paper is to discover if the current level of eAGRI portal ergonomics is sufficient or not. Several usability analysis and studies were applied with unflattering results. The results of all applied analysis show that the overall ergonomics of the portal is not at a satisfactory level and that there is no significant imp rovement on the portal in the last year.
EYM equations in the presence of q-stars
Creators: name: Prikas, Athanasios
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study Einstein-Yang-Mills equations in the presence of gravitating non-topological soliton field configurations, of q-ball type. We produce numerical solutions, stable with respect to gravitational collapse and to fission into free particles, and we study the effect of the field strength and the eigen-frequency to the soliton parameters. We also investigate the formation of such soliton stars when the spacetime is asymptotically anti de Sitter.
description: 11 pages, to appear in Phys. Rev. D
Radial migration and vertical action in N-body simulations
Creators: name: Mikkola, Daniel
name: McMillan, Paul. J
name: Hobbs, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the radial migration of stars as a function of orbital action as well as the structural properties of a large suite of N-body simulations of isolated disc galaxies. Our goal is to establish a relationship between the radial migration efficiency of stars and their vertical action. We aim to describe how that relationship depends on the relative gravitational dominance between the disc and the dark matter halo. By changing the mass ratio of our disc and dark matter halo we find a relationship between disc dominance, number and strength of spiral arms, and the ensuing radial migration as a function of the vertical action. We conclude that the importance of migration at large vertical action depends on the strength of the spiral arms and therefore the dominance of the disc. Populations with more radial action undergo less radial migration, independently of disc dominance. Our results are important for the future of analytical modelling of radial migration in galaxies and furthers the understanding of radial migration which is a key component of the restructuring of galaxies, including the Milky Way.
description: 13 pages, 12 figures, accepted for publication in MNRAS
Superparamagnetism and Spin Glass Dynamics of Interacting Magnetic Nanoparticle Systems
Creators: name: Jönsson, Petra E.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The physical properties of magnetic nanoparticles have been investigated with focus on the influence of dipolar interparticle interaction. For weakly coupled nanoparticles, thermodynamic perturbation theory is employed to derive analytical expressions for the linear equilibrium susceptibility, the zero-field specific heat and averages of the local dipolar fields. By introducing the averages of the dipolar fields in an expression for the relaxation rate of a single particle, a nontrivial dependence of the superparamagnetic blocking on the damping coefficient is evidenced. This damping dependence is interpreted in terms of the nonaxially symmetric potential created by the transverse component of the dipolar field. Strongly interacting nanoparticle systems are investigated experimentally in terms of spin glass behavior. Disorder and frustration arise in samples consisting of frozen ferrofluids from the randomness in particle position and anisotropy axis orientation. A strongly interacting FeC system is shown to exhibit critical dynamics characteristic of a spin glass phase transition. Aging, memory and rejuvenation phenomena similar to those of conventional spin glasses are observed, albeit with much weaker rejuvenation effects than in both a Ag(11 at% Mn) Heisenberg and an Fe_{0.5}Mn_{0.5}TiO_3 Ising spin glass. Differences in the nonequilibrium dynamics of the strongly interacting nanoparticle system and the two spin glass samples are discussed in terms of anisotropy and different timescales, due to the much longer microscopic flip time of a magnetic moment than of an atomic spin.
description: 62 pages, 25 figures. To be published in Advances in Chemical Physics
Nomada leucophthalma
Creators: name: Gérard, Maxence
name: Fiordaliso, William
name: Ferrais, Louise
name: Fournier, Chloé
name: Hairault, Malo
name: Lheureux, Lise
name: Rosa, Paolo
name: Ghisbain, Guillaume
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Apidae
Nomada
Nomada leucophthalma

description: Nomada leucophthalma (Kirby, 1802)
Conservation status
LC
description: Published as part of Gérard, Maxence, Fiordaliso, William, Ferrais, Louise, Fournier, Chloé, Hairault, Malo, Lheureux, Lise, Rosa, Paolo & Ghisbain, Guillaume, 2025, Wild bee diversity of the National Park of the Semois Valley (Belgium), pp. e 144223 in Biodiversity Data Journal 13 on page e144223, DOI: 10.3897/BDJ.13.e144223
Economic Crisis And the Fragility of World Wine Export
Creators: name: Fertö, I.
name: Fertö, I.
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agricultural Finance
subject: Research Methods/ Statistical Methods
subject: Duration of world wine exports
subject: economic crises
subject: leading wine exporters

description: The paper investigates the impacts of economic crisis on the duration of word wine exports for 40 leading wine exporter countries between 2000 and 2012. We analyze three attributes of wine exports embodied in exports relationships: the initial value of exports, the growth of exports within a spell, and the hazard of exports ceasing. Our results indicate that wine exports are rather short lived even for leading wine exporter countries. Our estimations imply that economic crisis has not significant impacts on initial value of wine export starting before crisis, whilst it has negative effects on spells beginning after crisis. However, economic crisis does not influence the export growth, and decrease the pr obability of failure of wine exports.
Exploitation of Agricultural Land in the Czech Republic and EU Countries
Creators: name: Gebeltová, Z.
name: Gebeltová, Z.
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agribusiness
subject: Agricultural Finance
subject: Agricultural land fund
subject: the Coefficient of Geographical Association
subject: agricultural land loss
subject: the Coefficient of Ecological Stability
subject: land price

description: The primary objective of the paper is to assess the extent and exploitation of agricultural land in the CR and EU countries based on selected macro-socioeconomic indicators in order to determine the position of the CR and future desirable exploitation, protection and stabilisation of agricultural land in the CR. The following methods will be employed in order to meet the objective: (1) The Coefficient of Geographical Association (CGA) and my own modified coefficients of association reflecting the impact of exploitation of agricultural land on indicators of the country’s economic level. (2) Comparison (shrinkage of agricultural land, workforce in agriculture and market price of agricultural land in selected countries). (3) The Coefficient of Ecological Stability to assess the extent of stable and unstable areas in EU-27 countries. The following data are used for calculations: Eurostat (2009, 2015), World Bank and FAOSTAT (1993-2014). The extent of agricultural land in the CR (2014/1993) has been decreasing more slowly than in the detailed comparison countries (5 countries with the lowest CGA). The price of the agricultural land (2014) is lower than in France, Germany and Poland; nevertheless, the actual price rates are not as contrasting against these countries if purchase parity is considered. The Coefficient of Ecological Stability ranks the Czech Republic in the second half of the list of EU-27 countries (22nd place). While the ecological stability of land has decreased slightly in Germany and France (2009-2015), an improvement has occurred in the CR.
Muon spectra of Quasi-Elastic and 1-pion production events at the KEK LBL neutrino oscillation experiment
Creators: name: Yu, Ji--Young
name: Paschos, E. A.
name: Roy, D. P.
name: Schienbein, I.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present predictions for the flux averaged muon energy spectra of quasi-elastic (QE) and 1-pion production events for the K2K long-baseline experiment. Using the general kinematical considerations we show that the muon energy spectra closely follow the neutrino energy spectrum with downward shift of the energy scale by 0.15 GeV (QE) and 0.4 GeV (1-pion production). These predictions seem to agree with the observed muon energy spectra in the K2K nearby detector. We also show the spectral distortion of these muon energy spectra due to the neutrino oscillation for the SK detector. Comparison of the predicted spectral distortions with the observed muon spectra of the 1-Ring and 2-Ring muon events in the SK detector will help to determine the oscillation parameters. The results will be applicable to other LBL experiments as well.
description: Proceedings of ICFP03, October, 2003, Seoul/Korea