cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
"It took me almost 30 minutes to practice this". Performance and Production Practices in Dance Challenge Videos on TikTok
Creators: name: Klug, Daniel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences
subject: J.4; H.5

description: TikTok is a music-based video sharing social media app famous for users creating short meme and dance videos. TikTok videos are largely based on popular song snippets, which is why lip syncing and dance moves evolve as significant user performance practices in videos. User prosumption has not yet been studied regarding the characteristics of TikTok. This paper is based on social practice and performance theory, social media studies, and participatory online video culture. It uses the #distantdance challenge on TikTok to analyze production practices and strategies of users through qualitative video product analysis. 92 videos were coded and categorized regarding their visual content (who participated in which way) and paratextual elements (used tags and captions). The visual and (para-)textual elements were then analyzed regarding indicators that allow to draw conclusions on users' video creation strategies and performance practices in participating in the #distantdance challenge. The results show videos are mainly performed by single white female teenagers wearing casual outfits in their bedrooms. Users shared their experiences about learning and performing the dance in video captions. While users prepared settings and outfits for their performance, the majority of performances seems rather unplanned or spontaneous. This indicates most videos might be part of a series of user attempts to master the dance challenge resulting in posting the first successful video performance to TikTok. In addition to the dance moves, participants also added gestures as closing elements to their performances. This indicates their knowledge of using signals as part of an online community while at the same time manifesting their belongingness to the community. These first results of a qualitative product analysis illustrate some of users' motivations and effort to participate in TikTok dance challenges.
description: 29 pages, incl. images NCA 106th Annual Convention: Communication at the Crossroads
Additional file 4 of Using natural experiments to improve public health evidence: a review of context and utility for obesity prevention
Creators: name: Crane, Melanie
name: Bohn-Goldbaum, Erika
name: Grunseit, Anne
name: Bauman, Adrian
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: Additional file 4: Table S3. Describes the research aims of included studies.
Engineering of directional emission from photonic crystal waveguides
Creators: name: Morrison, Steven K.
name: Kivshar, Yuri S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We analyze, by the finite-difference time-domain numerical methods, several ways to enhance the directional emission from photonic crystal waveguides through the beaming effect recently predicted by Moreno et al. [Phys. Rev. E 69, 121402(R) (2004)], by engineering the surface modes and corrugation of the photonic crystal surface. We demonstrate that the substantial enhancement of the light emission can be achieved by increasing the refractive index of the surface layer. We also measure power of surface modes and reflected power and confirm that the enhancement of the directional emission is related to the manipulation of the photonic crystal surface modes.
description: 6 pages, 4 figures, submitted to Optics Express (20-7-2004)
Large-scale multiconfiguration Dirac-Hartree-Fock calculations for astrophysics: n=4 levels in P-like ions from Mn~XI to Ni~XIV
Creators: name: Song, C. X.
name: Wang, K.
name: Del Zanna, G.
name: Jönsson, P.
name: Si, R.
name: Godefroid, M.
name: Gaigalas, G.
name: Radži{ū}t{ė}, L.
name: Rynkun, P.
name: Zhao, X. H.
name: Yan, J.
name: Chen, C. Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using the multiconfiguration Dirac-Hartree-Fock and the relativistic configuration interaction methods, a consistent set of transition energies and radiative transition data for the lowest 546 (623, 701, 745) states of the $3p^4 3d$, $3s 3p^2 3d^2$, $3s 3p^3 4p$, $3s 3p^4$, $3s^2 3d^3$, $3s^2 3p^2 3d$, $3s^2 3p^2 4d$, $3s^2 3p^2 4s$, $3p^3 3d^2$, $3p^5$, $3s 3p 3d^3$, $3s 3p^3 3d$, $3s 3p^3 4s$, $3s^2 3p 3d^2$, %$3s^2 3p^2 4f$, $3s^2 3p^2 4p$, $3s^2 3p^3$ configurations in Mn~XI (Fe~XII, Co~XIII, Ni~XIV) is provided. The comparison between calculated excitation energies for the $n=4$ states and available experimental values for Fe XII indicate that the calculations are highly accurate, with uncertainties of only a few hundred cm$^{-1}$. Lines from these states are prominent in the soft X-rays. With the present calculations, several recent new identifications are confirmed. Other identifications involving $3p^2 4d$ levels in Fe~XII that were found questionable are discussed and a few new assignments are recommended. As some $n=4$ states of the other ions also show large discrepancies between experimental and calculated energies, we reassess their identification. The present study provides highly accurate atomic data for the $n=4$ states of P-like ions of astrophysical interest, for which experimental data are scarce.
El sobreprecio del aceite de oliva ecologico frente al del conventional a nivel minorista, como factor explicativo de su escasa cuota de ventas en Espana
Creators: name: Rosa, Manuel
name: Zamora, Manuela
name: Salcedo, Maria
name: Rosa, Manuel
name: Zamora, Manuela
name: Salcedo, Maria
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Crop Production/Industries
subject: Environmental Economics and Policy
subject: Farm Management
subject: aceite de oliva
subject: aceite de oliva ecologico
subject: agricultura ecologica
subject: alimentos ecologicos
subject: precio
subject: sobreprecio
subject: olive oil
subject: organic olive oil
subject: organic farming
subject: organic food
subject: price
subject: price premium

description: El elavdo precio del aceite de oliva virgen extra ecologico -APVEE- frente al de su homonimo convencional, aceite de oliva virgen extra convencional -AOVEC-, es senaldo en la literatura como un factor limitante de su consumo. Sin embargo, la cuantificacion de la diferencia entre los precios de ambos aceites es una cuestion que no ha sido abordada en la literatura, y que constituye el principal objetivo de este trabajo, en el que, ademas, se analizan las relacioens entre la evolucion de los precios del AOVEE y del AOVEC. Para ello, se ha creado una base de datos de precios de destino, a la que se le aplican distintos analisis estadisticos. Los resultados confirman que la diferencia entre los precios de ambos aceites es de tal dimension que supera las maximas disposiciones de los consumidores a pagar pro el AOVEE. En consecuencia, la principal conclusion es que el diferencial de precios -sobreprecio- entre el AOVEE y el AOVEC es un freno al desarrollo de la demanda del AOVEE en Espana. The high price of organic extra virgin olive oil _AOVEE- front of his namesake conventional, extra virgin olive oil conventionally produced -AOVEC-,is noted in the literature as a factor limiting their use. However, measuring the difference between the prices of both oils is a matter that has not been discussed in literature, and that is the main objective of this work, which also analyzes the relationship between the evolution of prices of AOVEE and AOVEC. To do so, it has been created a database of target prices, which are applied various statistical analysis. Results confirm that the difference between the prices of of both oils is of such dimension that exceeds the maximum willingness to pay for AOVEE. Therefore, the main conclusion is that the price differential between AOVEC and AOVEE is an obstacle to the development of AOVEE demand in Spain.
Additional file 5 of Diversity of nitrogen-fixing rhizobacteria associated with sugarcane: a comprehensive study of plant-microbe interactions for growth enhancement in Saccharum spp.
Creators: name: Singh, Rajesh Kumar
name: Pratiksha Singh
name: Hai-Bi Li
name: Song, Qi-Qi
name: Guo, Dao-Jun
name: Solanki, Manoj K.
name: Verma, Krishan K.
name: Malviya, Mukesh K.
name: Xiu-Peng Song
name: Lakshmanan, Prakash
name: Yang, Li-Tao
name: Li, Yang-Rui
Publisher: name: figshare
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Plant Biology

description: Additional files 5: Table S2. Analysis of physical, chemical properties and trace elements structure in the soil of sugarcane plant.
Optical response of a nematic liquid crystal cell at splay-bend transition: model and dynamic simulation
Creators: name: Xu, Peizhi
name: Chigrinov, Vladimir
name: Kiselev, Alexei D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study dynamical optical response of a nematic liquid crystal cell that undergoes the splay-bend transition after applying the voltage across the cell. We formulate a simplified model that takes into account both the flexoelectric coupling and the surface rotational viscosity. The dynamic equations of the model were solved numerically to calculate temporal evolution of the director profile and the transmittance. We evaluate the response time as a function of a number of parameters characterising dielectric and elastic anisotropies, asymmetry of the surface pretilt angles, anchoring energy, surface rotational viscosity and flexoelectricity.
description: uses revtex4, 14 pages, 10 figures
Ague, agricultura y desarrollo: avances y retos para la reduccion de la pobreza
Creators: name: Nunez, Paula
name: Colmenero, Alberto
name: Nunez, Paula
name: Colmenero, Alberto
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agribusiness
subject: Community/Rural/Urban Development
subject: Food Consumption/Nutrition/Food Safety
subject: agua
subject: desarrollo economico
subject: mujer
subject: alimentacion
subject: water
subject: economic development
subject: woman
subject: nutrition

description: Agua y produccion agraria can indisolublemente unidas. El regadio permite aumentar y estabilizar las cosechas, mejorando las rentas de los hogares rurales. En las zonas mas pobres del mundo el regadio no se ha explotado de acuerdo al potencial productivo y los rucursos existences. El mundo tiene recursos suficientes para alimentarse, pero muchos paises veran aumentada su dependencia alimentaria del exterior debido a la escasez de recursos por habitante. La expansion del regadio en el mundo se ha ralentizado en los ultimos 20 anos. El regadio, como motor de desarrollo rural y vehiculo de reduccion de la pobreza, ha cobrado importancia tras la crisis alimentaria de 2007-2008, y el posterior encarecimiento de las materias primas agrarias. La gestion del aqua y de la tierra en las regiones mas pobres precisa tanto inversiones productivas como mejoras en la gobernanza y la participacion de la mujer. Este articulo analiza estas cuestiones y trata de identificar los retos mas acuciantes para 2011-2020.
Note on Unitarity Constraints in a Model for a Singlet Scalar Dark Matter Candidate
Creators: name: Cynolter, G.
name: Lendvai, E.
name: Pocsik, G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate perturbative unitarity constraints in a model for a singlet scalar dark matter candidate. Considering elastic two particle scattering processes of the Higgs particle and the dark matter candidate, a real Klein-Gordon scalar field, perturbative unitarity constrains the self-couplings of the scalar fields.
description: 6 pages, 4 eps figures
A dynamical symmetry of the spherical dust collapse
Creators: name: Debnath, Ujjal
name: Chakraborty, Subenoy
name: Dadhich, Naresh
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: By linearly scaling the initial data set (mass and kinetic energy functions) together with the initial area radius of a collapsing dust sphere, we find a symmetry of the collapse dynamics. That is, the linear transformation defines an equivalence class of data sets which lead to the same end result as well as its evolution all through. In particular, the density and shear remain invariant initially as well as during the collapse. What the transformation is exhibiting is an interesting scaling relationship between mass, kinetic energy and the size of the collapsing dust sphere.
description: 4 pages, no figure, Revtex
Frozen Waves: Stationary optical wavefields with arbitrary longitudinal shape, by superposing equal-frequency Bessel beams
Creators: name: Zamboni-Rached, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Classical Physics (physics.class-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this paper it is shown how one can use Bessel beams to obtain a stationary localized wavefield with high transverse localization, and whose longitudinal intensity pattern can assume any desired shape within a chosen interval 0 < z < L of the propagation axis. This intensity envelope remains static, i.e., with velocity v=0; and because of this we call "Frozen Waves" such news solutions to the wave equations (and, in particular, to the Maxwell equations). These solutions can be used in many different and interesting applications, as optical tweezers, atom guides, optical or acoustic bistouries, various important medical purposes, etc.
description: LaTeX file (10 pages, including 2 sets of two Figures)
Additional file 3 of Diversity of nitrogen-fixing rhizobacteria associated with sugarcane: a comprehensive study of plant-microbe interactions for growth enhancement in Saccharum spp.
Creators: name: Singh, Rajesh Kumar
name: Pratiksha Singh
name: Hai-Bi Li
name: Song, Qi-Qi
name: Guo, Dao-Jun
name: Solanki, Manoj K.
name: Verma, Krishan K.
name: Malviya, Mukesh K.
name: Xiu-Peng Song
name: Lakshmanan, Prakash
name: Yang, Li-Tao
name: Li, Yang-Rui
Publisher: name: figshare
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Plant Biology

description: Additional files 3: Figure S3. BOX fingerprinting of the screened bacterial isolates from sugarcane. Strain Codes: B1. CoY3, B2. CoY7, B3. CoY8, B4. CoA1, B5. CoA10, B6. AY6, B7. AY7, B8. AY8, B9. AN8, B10. AN11, B11. AN12, B12. BN5, B13. CY5, B14. CY9, B15. CY10, B16. CY11, B17. CA1, B18. CA6, B19. CA8, B20. CN13, B21. CN14 and B22. N1. M, molecular size marker from 100 bp- 5 kb (Takara). Figure S4. ERIC-PCR fingerprinting of selected bacteria from sugarcane. Strain Codes: B1. CoY3, B2. CoY7, B3. CoY8, B4. CoA1, B5. CoA10, B6. AY6, B7. AY7, B8. AY8, B9. AN8, B10. AN11, B11. AN12, B12. BN5, B13. CY5, B14. CY9, B15. CY10, B16. CY11, B17. CA1, B18. CA6, B19. CA8, B20. CN13, B21. CN14 and B22. N1. Without labelled gel lanes are not used in this study.
$ε^*$+: An Online Coverage Path Planning Algorithm for Energy-constrained Autonomous Vehicles
Creators: name: Shen, Zongyuan
name: Wilson, James P.
name: Gupta, Shalabh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents a novel algorithm, called $ε^*$+, for online coverage path planning of unknown environments using energy-constrained autonomous vehicles. Due to limited battery size, the energy-constrained vehicles have limited duration of operation time. Therefore, while executing a coverage trajectory, the vehicle has to return to the charging station for a recharge before the battery runs out. In this regard, the $ε^*$+ algorithm enables the vehicle to retreat back to the charging station based on the remaining energy which is monitored throughout the coverage process. This is followed by an advance trajectory that takes the vehicle to a near by unexplored waypoint to restart the coverage process, instead of taking it back to the previous left over point of the retreat trajectory; thus reducing the overall coverage time. The proposed $ε^*$+ algorithm is an extension of the $ε^*$ algorithm, which utilizes an Exploratory Turing Machine (ETM) as a supervisor to navigate the vehicle with back and forth trajectory for complete coverage. The performance of the $ε^*$+ algorithm is validated on complex scenarios using Player/Stage which is a high-fidelity robotic simulator.
Label-free colorectal cancer screening using deep learning and spatial light interference microscopy (SLIM)
Creators: name: Zhang, Jingfang "Kelly"
name: He, Yuchen R.
name: Sobh, Nahil
name: Popescu, Gabriel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Medical Physics (physics.med-ph)
subject: Image and Video Processing (eess.IV)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Biological sciences

description: Current pathology workflow involves staining of thin tissue slices, which otherwise would be transparent, followed by manual investigation under the microscope by a trained pathologist. While the hematoxylin and eosin (H&E) stain is well-established and a cost-effective method for visualizing histology slides, its color variability across preparations and subjectivity across clinicians remain unaddressed challenges. To mitigate these challenges, recently we have demonstrated that spatial light interference microscopy (SLIM) can provide a path to intrinsic, objective markers, that are independent of preparation and human bias. Additionally, the sensitivity of SLIM to collagen fibers yields information relevant to patient outcome, which is not available in H&E. Here, we show that deep learning and SLIM can form a powerful combination for screening applications: training on 1,660 SLIM images of colon glands and validating on 144 glands, we obtained a benign vs. cancer classification accuracy of 99%. We envision that the SLIM whole slide scanner presented here paired with artificial intelligence algorithms may prove valuable as a pre-screening method, economizing the clinician's time and effort.
description: 17 pages, 6 figures
Evolution of Spatially Inhomogeneous Eco-Systems: An Unified Model Based Approach
Creators: name: Kunwar, Ambarish
Publisher: name: arXiv
Year: 2004
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Recently we have extended our the "unified" model of evolutionary ecology to incorporate the {\it spatial inhomogeneities} of the eco-system and the {\it migration} of individual organisms from one patch to another within the same eco-system. In this paper an extension of our recent model is investigated so as to describe the {\it migration} and {\it speciation} in a more realistic way.
description: Latex, 10 pages, 8 figures
Abastecimiento y saneamiento en zoras rurales de paises en desarrollo. Situacion actual y desafios para el futuro
Creators: name: Jimenez, A.
name: Marin, Giovanni
name: Perez-Foguet, A.
name: Jimenez, A.
name: Marin, Giovanni
name: Perez-Foguet, A.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agribusiness
subject: Environmental Economics and Policy
subject: Food Security and Poverty
subject: abastecimiento de agua
subject: saneamiento
subject: gestion comunitaria
subject: acceso a los servicios
subject: derecho humano al agua
subject: water supply
subject: sanitation
subject: community management
subject: service access
subject: human right to water

description: El presente articulo detalla la problematica asociada a la provision de los servicios de abastecimiento y saneamiento en las zonas rurales de los paises en desarrollo. Se caracteriza la evolucion historia y la situacion actual en cada uno de estos servicios. Se explican y se analizan criticamente los criterios de medicion de acceso y las metodologias de intervencion principales. Las conclusiones ofrecen lineas de avance a incorporar en los modelos de provision de dichos servicios, teniendo en cuenta la consideracion del aqua y saneamiento como un derecho humano. EL concreto se revisa el denominado modelo de gestion comunitaria para el caso del abastecimiento de agua y se determinan sus debilidades en lo que atane a la universalifaf y equidad de las intervencioens, su sostenibilidad y la falta de participacion activa de las administracioness publicas de ambito local o regional. Por lo que se refiere a las intervenciones destinadas a la promocion del saneamiento, se pasa revista a las que actualmente estan vigentes, y concretamente las relacionadas con la concienciacion sobre la salud e higiene, el denominado marketing social, y, por ultimo, los destinados a incentivar la inversion en saneamiento. This paper analyses the management performance of rural communities for water supply and sanitation systems in developing countries, describing the historical trends and its current situation. Special attention is paid to the criteria considered to determine the effective access to both services, as well as to the principal implementation models actually used. Different solutions are proposed in order to incorporate in the the provision of both facilities the consideration of the human right to water and sanitation. Specifically, the community water management model is considered, identifying its weaknesses in relation to different human rights considerations such as universality, equity, sustainability, as well as the necessary participation of the public administrations, and specially from the intermediate level. With respect to the implementing models that aim the promotion of sanitation services, three alternatives are considered: linking health and hygiene, social marketing, and promotion of the financing of the sanitation services.
Use of the Woodcock-Johnson III with preschool age children born prematurely
Creators: name: Kozey, Michelle Lynne
Publisher: name: University of British Columbia
Year: 2010

description: Preterm and low birth-weight children are one of the most common at-risk groups for whom early assessment and long term monitoring is strongly indicated, as they display a significantly higher incidence of developmental impairments such as difficulties in childhood cognitive, motor, academic, behavioural and social functioning, and they require higher levels of special education services (Bhutta, Cleeves, Casey, Craddock & Anand, 2002). Although demand has increased for the early identification of the psycho-educational difficulties of preterm and other clinical populations, the assessment of preschool-aged children has continued to be challenged by issues related to the standardized assessment of young children, and the technical properties and content validity of instruments available for use with this age range. The most recent revision of the Woodcock-Johnson III contains tests that are developmentally and psychometrically appropriate for use with preschool age children, but no published studies are currently available on its use with clinical populations of a preschool age (Ford, Kozey & Merkel, 2006 under review). The purpose of this study was to evaluate the utility of the WJ III with a common clinical population of a preschool age, specifically children aged four and five years born who were born prematurely. Results indicated no significant differences between the score distributions of preschool-aged children born prematurely versus a matched sample from the WJ III Standardization sample in terms of global intelligence, individual Cattell-Horn-Carroll abilities, global achievement or individual academic abilities. Design issues related to the screening of the matched sample limited possible conclusions regarding the relationship between birth status and performance on the WJ III tests administered in this study, and no relationship was found between perinatal complications as measured by the Maternal Perinatal Scale and performance on the WJ III. However, current findings may be a function of the limited size and biased composition of the study sample, rather than the actual function of the WJ III. The application of CHC theory and a cross-battery approach remains as a promising method to understanding the cognitive and academic deficits of preterm children in general, and further investigation is necessary to determine the utility of the WJ III with preschool-aged children born prematurely.
Additional file 3 of Using natural experiments to improve public health evidence: a review of context and utility for obesity prevention
Creators: name: Crane, Melanie
name: Bohn-Goldbaum, Erika
name: Grunseit, Anne
name: Bauman, Adrian
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: Additional file 3: Figure S1. Showing the use of natural experiment studies surrounding nutrition and physical activity interventions on obesity.
Semi-Submersible Wind Turbine Hull Shape Design for a Favorable System Response Behavior
Creators: name: Lemmer, Frank
name: Yu, Wei
name: Müller, Kolja
name: Cheng, Po Wen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: Floating offshore wind turbines are a novel technology, which has reached, with the first wind farm in operation, an advanced state of development. The question of how floating wind systems can be optimized to operate smoothly in harsh wind and wave conditions is the subject of the present work. An integrated optimization was conducted, where the hull shape of a semi-submersible, as well as the wind turbine controller were varied with the goal of finding a cost-efficient design, which does not respond to wind and wave excitations, resulting in small structural fatigue and extreme loads. The optimum design was found to have a remarkably low tower-base fatigue load response and small rotor fore-aft amplitudes. Further investigations showed that the reason for the good dynamic behavior is a particularly favorable response to first-order wave loads: The floating wind turbine rotates in pitch-direction about a point close to the rotor hub and the rotor fore-aft motion is almost unaffected by the wave excitation. As a result, the power production and the blade loads are not influenced by the waves. A comparable effect was so far known for Tension Leg Platforms but not for semi-submersible wind turbines. The methodology builds on a low-order simulation model, coupled to a parametric panel code model, a detailed viscous drag model and an individually tuned blade pitch controller. The results are confirmed by the higher-fidelity model FAST. A new indicator to express the optimal behavior through a single design criterion has been developed.
title: Light-light scattering in the presence of magnetic fields
Creators: name: Wödlinger, Matthias Gerold
Publisher: name: TU Wien
Year: 2018
Subjects: subject: Quantenelektrodynamik
subject: Quantum electrodynamics

description: Evidence for scattering of light by light has been found recently in heavy ion collisions by the ATLAS collaboration at the LHC. These collisions produce strong magnetic fields that can influence the probability of light-light scattering events. Motivated by these findings we investigate low energy light-light scattering in the presence of spatially homogeneous magnetic background fields in the Euler-Heisenberg theory. We derive the scattering matrix element for four external photons in Euler-Heisenberg theory. With this we compute the full analytical differential cross section in the limit of weak fields and numerically for arbitrary field strengths. For spinor QED we find that scattering parallel to the magnetic field is suppressed. For scattering processes in which none of the involved photons is parallel to the magnetic field we find that the differential cross section for unpolarized photons averaged over final polarizations grows quadratically with the field strength were maximum growth can be found if the scattering plane is perpendicular to the field strength. For scalar QED we find no quadratic growth and the cross section drops quartic in the magnetic field. We conclude that the quadratic growth in the spinor case has its cause in the interaction of spin and magnetic field and show this claim in the worldline formulation of the one loop QED action. For charged vector particles we find a divergence of the cross section at B/B c = 1 which we identify as a consequence of a phase transition to a superconducting vacuum state.
Agua y Globalizacion: Retos y oportunidades para una mejor gestion de los recursos hidricos
Creators: name: Aldaya, M.
name: Niemeyer, I.
name: Zarate, E.
name: Aldaya, M.
name: Niemeyer, I.
name: Zarate, E.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Environmental Economics and Policy
subject: Globalizacion
subject: guella hidrica verde
subject: huella hidrica azul
subject: comercio de agua virtual
subject: America Latina
subject: Globalization
subject: green water footprint
subject: blue water footprint
subject: virtual water trade
subject: Latin America

description: En un contexto de creciente globalizacion del comercio, el articulo analiza los retos y oportunidades para alcanzar una mejor gestion de los recursos hidricos a nivel global; y la utilidad del indicador de la huella hidrica y el comercio de agua virtual para tal fin. El caso de America Latina destaca la necesidad de utilizar un enfoque integrado para la gestion del agua, considerando indicadores complementarios y posibles comoensaciones entre recursos. Es necesario encontrar una manera de utilizar el agua en el mundo de manera mas productiva y eficiente y ponerla a disposicion de todos a un costo razonable, dejando cantidades suficientes para mantener el medio ambiente. La creciente globalizacion del comercio presenta oportunidades para mejroar la productividad y eficiencia global en el uso del agua si los paises aprovechan sus ventajas comparativas. Sin embargo, para evitar las externalidades negativas en la zona de produccion es necesario establecer politicas nacionales y marcos institucionales adecuados, incluyendo una politica sobre estructuras de fijacion de precios de agua, la contabilidad columetrica y economica de los recursos hidricos (incluyendo indicadores como huella hidrica) y una etiqueta para informar a los consumidores en lugares remotos. In a context of increasing globalization of trade, the article analyzes the challenges and opportunities to achieve better management of water resources globally, and the usefulness of the water footprint and virtual water trade indicators for this purpose. The case of Latin America highlights the need for an integrated approach to water management, considering complementary indicators and possible trade-offs between resources. We must find a way to use the water in the world more productive and efficient, and make it available to all at a reasonable cost, leaving sufficient quantities to maintain the environment. The increasing globalization of trade presents opportunities to improve productivity and overall efficiency in water use if countries use their comparative advantages. However, to avoid negative externalities in the production area it is necessary to establish appropriate national policies and institutional frameworks, including a policy on water pricing, volumetric and economic accounting of water resources (including indicators such as water footprint) and a label to inform consumers in remote locations.
Additional file 4 of Diversity of nitrogen-fixing rhizobacteria associated with sugarcane: a comprehensive study of plant-microbe interactions for growth enhancement in Saccharum spp.
Creators: name: Singh, Rajesh Kumar
name: Pratiksha Singh
name: Hai-Bi Li
name: Song, Qi-Qi
name: Guo, Dao-Jun
name: Solanki, Manoj K.
name: Verma, Krishan K.
name: Malviya, Mukesh K.
name: Xiu-Peng Song
name: Lakshmanan, Prakash
name: Yang, Li-Tao
name: Li, Yang-Rui
Publisher: name: figshare
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Plant Biology

description: Additional files 4: Table S1. The number of substrates utilized by individual strains for Bacillus megaterium (CY5) and Bacillus mycoides (CA1).
T$^{\star}$-Lite: A Fast Time-Risk Optimal Motion Planning Algorithm for Multi-Speed Autonomous Vehicles
Creators: name: Wilson, James P.
name: Shen, Zongyuan
name: Gupta, Shalabh
name: Wettergren, Thomas A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we develop a new algorithm, called T$^{\star}$-Lite, that enables fast time-risk optimal motion planning for variable-speed autonomous vehicles. The T$^{\star}$-Lite algorithm is a significantly faster version of the previously developed T$^{\star}$ algorithm. T$^{\star}$-Lite uses the novel time-risk cost function of T$^{\star}$; however, instead of a grid-based approach, it uses an asymptotically optimal sampling-based motion planner. Furthermore, it utilizes the recently developed Generalized Multi-speed Dubins Motion-model (GMDM) for sample-to-sample kinodynamic motion planning. The sample-based approach and GMDM significantly reduce the computational burden of T$^{\star}$ while providing reasonable solution quality. The sample points are drawn from a four-dimensional configuration space consisting of two position coordinates plus vehicle heading and speed. Specifically, T$^{\star}$-Lite enables the motion planner to select the vehicle speed and direction based on its proximity to the obstacle to generate faster and safer paths. In this paper, T$^{\star}$-Lite is developed using the RRT$^{\star}$ motion planner, but adaptation to other motion planners is straightforward and depends on the needs of the planner
Determination of Latent Dimensionality in International Trade Flow
Creators: name: Truong, Duc P.
name: Skau, Erik
name: Valtchinov, Vladimir I.
name: Alexandrov, Boian S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Information Retrieval (cs.IR)
subject: General Economics (econ.GN)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business

description: Currently, high-dimensional data is ubiquitous in data science, which necessitates the development of techniques to decompose and interpret such multidimensional (aka tensor) datasets. Finding a low dimensional representation of the data, that is, its inherent structure, is one of the approaches that can serve to understand the dynamics of low dimensional latent features hidden in the data. Nonnegative RESCAL is one such technique, particularly well suited to analyze self-relational data, such as dynamic networks found in international trade flows. Nonnegative RESCAL computes a low dimensional tensor representation by finding the latent space containing multiple modalities. Estimating the dimensionality of this latent space is crucial for extracting meaningful latent features. Here, to determine the dimensionality of the latent space with nonnegative RESCAL, we propose a latent dimension determination method which is based on clustering of the solutions of multiple realizations of nonnegative RESCAL decompositions. We demonstrate the performance of our model selection method on synthetic data and then we apply our method to decompose a network of international trade flows data from International Monetary Fund and validate the resulting features against empirical facts from economic literature.
Casimir force between dispersive magnetodielectrics
Creators: name: Tomas, M. S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We extend our approach to the Casimir effect between absorbing dielectric multilayers [M. S. Tomas, Phys. Rev. A 66, 052103 (2002)] to magnetodielectric systems. The resulting expression for the force is used to numerically explore the effect of the medium dispersion on the attractive/repulsive force in a metal-magnetodielectric system described by the Drude-Lorentz permittivities and permeabilities.
description: 12 pages, 5 eps figures, revised, accepted for publication in Phys. Lett. A
PTF1J2224+17: a short-period, high-field polar
Creators: name: Schwope, A. D.
name: Thinius, B. D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present time-resolved photometry of the cataclysmic variable (CV) PTF1J2224+17 obtained during 4 nights in October 2018 and January 2019 from Inastars observatory. The object is variable on a period of 103.82 min. Archival Catalina Real-Time Transient Survey (CRTS), PTF, and ZTF-data show frequent changes between high and low states. Based on its photometric properties and the cyclotron humps in the identification spectrum the object is certainly classified as an AM Herculis star (or polar) with a likely magnetic field strength of B ~ 65 MG. Its accretion duty cycle was estimated from nine years of photometric monitoring to be about 35 %.
description: AN, in press (7 pages, 6 figures)
Efectos de la politica estructural pesquera sobre la flota comunitaria en el periodo 2000-08
Creators: name: Regueiro, Juan C.
name: Lafuente, Manuel M. Varela
name: Regueiro, Juan C.
name: Lafuente, Manuel M. Varela
Publisher: name: Unknown
Year: 2011
Subjects: subject: International Relations/Trade
subject: Livestock Production/Industries
subject: Production Economics
subject: Politica Pesquera Comun
subject: politica estructural
subject: flota pesquera
subject: subvenciones
subject: common fisheries policy
subject: structural policy
subject: fishing fleet
subject: subsidies

description: A lo largo de 2001, la Comision Europea dara a conocer su propuesta legislativa para reforma de la Politica Pesquera Comun. Este trabajo tiene el proposito de analizar la politica estructural de la pesca y realizar una valoracion de los efectos de dicha politica sobre la sobredimension de la flota. Para ello, primero se repasa su evolucion, despues se analizan los efectos recientes de la misma y, por ultimo, se evaluan los principales resultados en el ultimo periodo de aplicacion. la principal conlusion es que, el supuesto fracaso de la PPC para alcanzar el equilibrio entre capacidad pesquerea y recursos naturales disponibles, no es responsabilidad, al menos en exclusiva, de la politica estructural seguidad respecto a la flota. Throughout 2001, the European Commission will make public its legislative proposal for the reform of the Common Fisheries Policy. The purpose of the present paper is to analyse the structural fisheries policy and to make a valuation of its effects on the fleet overcapacity. In order to reach that goal, firstly its evolution is revised, later the recent effects of that policy are analysed and, finally, principal results are evaluated in the last period of implementation. The main conclusion drawn is that, the supposed failure of the PPC to reach the balance between fishing capacity and natural available resources, is not an exclusive responsibility of the structural policy followed with regard to the fishing fleet.
Magnetic excitations in the stripe phase of high-T_c superconductors
Creators: name: Uhrig, G. S.
name: Schmidt, K. P.
name: Grüninger, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The magnetic excitations in the stripe phase of high-T_c superconductors are investigated in a model of spin ladders which are effectively coupled via charged stripes. Starting from the effective single-triplon model for the isolated spin ladder, the quasi-one-dimensional spin system can be described straightforwardly. Very good agreement is obtained with recent neutron scattering data on La_(15/8)Ba_(1/8)CuO_4 (no spin gap) and YBa_2Cu_3O_(6.6) (gapped). The signature of quasi-one-dimensional spin physics in a single-domain stripe phase is predicted.
description: 3 pages, 3 figures included, submitted to the proceedings of JEMS 2004
Static spherically symmetric Einstein-Yang-Mills-dilaton black hole and its thermodynamics
Creators: name: Stetsko, M. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A static black hole with spherical symmetry is obtained and examined in the framework of Einstein-Yang-Mills-dilaton theory. The obtained black hole solution allowed us to derive and investigate entropy, temperature and heat capacity. To better examine the thermodynamics of the black hole extended phase space is also used. On this ground the equation of state is obtained and studied. We have also investigated the Gibbs free energy and it is shown that below the critical temperature the system demonstrates phase transitions of the first as well as of the zeroth order which is notable feature for other types of dilaton black holes. At the end critical exponents for the black hole are calculated.
description: 20 pages, 8 figures
Physics of Massive Neutrinos
Creators: name: Valle, J. W. F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: I summarize the present status of global analyses of neutrino oscillations, including the most recent KamLAND and K2K data, as well as the latest solar and atmospheric neutrino fluxes. I give the allowed ranges of the three--flavour oscillation parameters from the current worlds' global neutrino data sample, their best fit values and discuss the small parameters DeltaM_solar/DeltaM_atm and sin^2 theta_13, which characterize the strength of CP violation in neutrino oscillations. I briefly discuss neutrinoless double beta decay and the LSND neutrino oscillation hint, as well as the robustness of the neutrino oscillation results in the presence of non-standard physics.
description: 10 pages, 10 figures, 2 tables, uses espcrc2.sty Opening talk at 6th International Conf. on Neutrino Factories and SuperBeams (NuFact04) Osaka, Japan, July 26-August 1, 2004
Evaluacion de la eficiencia de un proyecto tipico de modernizacion de regadios
Creators: name: Luque, Javier
name: Luque, Javier
Publisher: name: Unknown
Year: 2011
Subjects: subject: Demand and Price Analysis
subject: Environmental Economics and Policy
subject: Farm Management
subject: Production Economics
subject: eficienia de riego
subject: productividad aparente neta del agua
subject: indice costeficacia
subject: necesidades vrutas o teoricas de riego
subject: dmeanda de agua en parcela y en cabecera
subject: margen neto de explitacion
subject: irrigation efficiency
subject: water net productivity
subject: cost/effectiveness ration
subject: theoretical water requirements
subject: water demand at farm level
subject: water abstraction for irrigation
subject: net margin or farm revenue

description: En este trabajo se plantea un analisis economico con el que valorar la eficiencia en la uso del agua que puede alcanzarse con un proyectyo de modernizacion de regadios. la comparacion entre una situacion inicial y otra con proyecto, bajo ciertos escenarios complementarios -que se refieren al cambio o no de la orientacion productiva, al ajuste de riegos a las necesidades teoricas y a la sustitucion del sistema de aplicacion-, se establece mediante unos indicadores de eficiencia, tales como la renta esperada, la productividad aparente neta atribuible al agua, la predicible reduccion en su demanda, asi como un indice coste-eficacia. Este analisis requiere una gran cantidad de datos, algunos de ellos de dificil determinacion, pues responden a previsiones o expectativas de futuro, que podrian desvirtuar los resultados finales. Se recomienda en consecuencia una busqueda precisa de esos datos en la zona beneficiada, en especial, los relativos a las producciones de los cultivos, los volumenes de agua aplicados y los realmente requeridos, los gastos de explotacion y la eficiencia en el transporte del agua. In this paper an economic analysis is intended for assessment of the efficiency in the use of water which could be achieved by means of a modernisation plan of irrigation networks. Comparison between the initial situation and the ones which come up after the plan's implementation, under several scenarios of complementary uses of water, related to the change of agricultural production, the adjustment of consumption to the theoretical water requirements of crops and the replacement of the irrigation system at farm level, is dealt with performance indicators, such as the foreseen farm income, the water net productivity, and predicted demand reduction or a cost/effectiveness ratio. This analysis demands a big deal of data, some of them difficult to achieve as long as they stand for expectations, which might spoil the results. Consequently a precise research of this data in the targeted area is strongly recommended, specially the one related to goods production, water amounts supplied and really required, operational costs and efficiency in transport networks.
description: Q12, Q25
KOSZTY EKSPLOATACJI ŚRODKÓW TECHNICZNYCH A DOCHÓD PRZEDSIĘBIORSTWA
Creators: name: Wasąg, Zbigniew
name: Wasąg, Zbigniew
Publisher: name: Unknown
Year: 2014
Subjects: subject: Agribusiness
subject: agricultural business
subject: maintenance costs
subject: usage costs
subject: business income

description: The aim of the study is to determine maintenance costs of technical equipment and their influence on business income. In the years 2004-2009 70 agricultural farms were studies in the Biłgoraj County which used EU subsidies for technical modernisation. The annual average usage of means of technical resources in agriculture is presented as the number of working hours per machine. In order to determine maintenance costs of technical resources, the group of farms under study was divided according to the amount of subsidy, to the area of the arable land, to the economic size unit (ESU) and to the income of the farm. The gross income of an agricultural business is calculated as the balance difference between the net value of the production of goods as well as other revenues and direct and indirect costs (gross added value), less taxes, insurance, benefits and other non-material production expenses. The group ordered according to the amount of subsidies showed that greatest maintenance costs in the category of 50 thousand PLN and 50-100 thousand PLN. With a growth of the amount of subsidy, area of AL and the economic size unit saw a simultaneous increase in the maintenance costs. Maintenance costs per one hectare of arable land decrease with an increase in the amount of subsidy, area of AL and the economic size. Whereas an increase in the business income resulted in a simultaneous increase of maintenance costs.