cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
As Mídias e a Educação: possibilidades de relações.
Creators: name: Cabanha, Samuel
name: Cristiane De Bastiani Balla
name: Regiane Cristina Tonatto
name: Moraes, Denise Rosana Da Silva
name: Anjos, Poliana Cavaglieri Saldanha Dos
Publisher: name: figshare
Year: 2020
Subjects: subject: 140301 Cross-Sectional Analysis
subject: FOS: Economics and business

description: Artigo publicado na Revista Contribuciones a las Ciencias Sociales - CCCSS
Additional file 1 of Investigation of the distribution of inguinal lymph nodes and delineation of the inguinal clinical target volume using 18F-FDG PET/CT
Creators: name: Han, Jia-Li
name: Qi, Yan-Ge
name: Liu, Jia-Ling
name: Yan, Xia
name: Zhang, Wan-Chun
name: Yuan, Ling
name: Hao, Xin-Zhong
name: Song, Jian-Bo
name: Li, Si-Jin
Publisher: name: figshare
Year: 2024
Subjects: Space Science
Medicine
Cell Biology
Biological Sciences not elsewhere classified

description: Supplementary Material 1
Time-Dependent MHD Shocks and Line Emission: The Case of the DG Tau Jet
Creators: name: Massaglia, S.
name: Mignone, A.
name: Bodo, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The line emission from a growing number of Herbig-Haro jets can be observed and resolved at angular distances smaller than a few arcseconds from the central source. The interpretation of this emission is problematic, since the simplest model of a cooling jet cannot sustain it. It has been suggested that what one actually observes are shocked regions with a filling factor of $\sim 1%$. In this framework, up to now, comparisons with observations have been based on stationary shock models. Here we introduce for the first time the self-consistent dynamics of such shocks and we show that considering their properties at different times, i.e. locations, we can reproduce observational data of the DG Tau microjet. In particular, we can interpret the spatial behavior of the [SII]6716/6731 and [NII]/[OI]6583/6300 line intensity ratios adopting a set of physical parameters that yield values of mass loss rates and magnetic fields consistent with previous estimates. We also obtain the values of the mean ionization fraction and electron density along the jet, compare these values with the ones derived from observations using the sulfur doublet to constrain the electron density (e.g. Bacciotti et al. 1995).
description: 6 pages, 3 figures
Potential Adoption of Genetically Modified Rapeseed in France, Effects on Revenues of Farmers and Upstream Companies: an ex ante evaluation
Creators: name: Desquilbet, Marion
name: Lemarie, Stephane
name: Levert, Fabrice
name: Desquilbet, Marion
name: Lemarie, Stephane
name: Levert, Fabrice
Publisher: name: Unknown
Year: 2002
Subjects: subject: Consumer/Household Economics
subject: genetically modified organisms
subject: innovation
subject: diffusion
subject: rapeseed

description: In this paper, we conduct an empirical investigation of potential adoption of herbicide-tolerant (HT) genetically modified (GM) rapeseed in France. Our aim is to study ex ante the potential impact of their adoption in France, in terms of adoption level, economic gains, and distribution of these gains between farmers and input suppliers. We use French survey data about current plant protection practices, in order to compute pesticide costs with conventional (i.e., non GM) crops for individual farms. Then, based on results of technical studies about GM variety trials in France, we compute a predicted pesticide cost with the GM variety. Next, we study adoption rates and gains or losses of farmers (adopters and non adopters) and upstream companies (sellers of conventional herbicides, of the total herbicide to which GM rapeseed is tolerant, of GM seed), depending on the GM seed license price, the margin rate on herbicide sales and the price of conventional herbicides.
The measurement of forces in chip refiners
Creators: name: Siadat, Seyed Mohammad Ali
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of the chip refining process in the pulp and paper industry is to produce wood pulps and to enhance certain desirable properties of the fibres in the pulp suspension, by subjecting the wood material to cycles of shear and compressive stress. This process has commonly been quantified in terms of energy-based parameters such as specific energy and refining intensity, but such methods, although useful for establishing energy-pulp quality relationships, do not describe the underlying fundamental mechanisms of the process. It has been suggested that a knowledge of the stress-strain history of individual fibres can yield a deeper understanding of the process [Page, Fundamental Research Symposium (1989)]. With the long-term goal of such an understanding, the forces experienced by pulp in the refining zone are measured in a laboratory refiner operating at 700 rpm with softwood TMP at 16% consistency. This is done using a two-axis force sensor, originally designed by A . Bankes, P. Wild and D. Ouellet. The design, in its original form, did not perform well enough to provide a reliable force measurement under the high excitation frequency of passing refiner bars, as the sensor's resonant frequency was too low. A modified design with a much higher natural frequency is presented here, along with force measurements in the refining zone for various plate clearances, and varying dilution flow rate. From these measurements, we see that both the normal and shear forces contain a component due to the ploughing action of the corner of the bar through the floe (termed the comer force), a phenomenon previously only seen in the shear force [Batchelor et al. J. Pulp Pap. Sci. 23(1) (1997), Senger et al., Proceedings of the International Mechanical Pulping Conference, (2001)]. The peak normal force increased with decreasing plate clearance, while the peak shear force measured by the sensor did not exceed UN, corresponding to a maximum shear force per unit bar length of 2.2 kN/m. The equivalent tangential coefficient of friction decreased with decreasing plate clearance, and also decreased upon the addition of dilution water. The sensor design needs further refinement for testing at higher refiner rotational speeds, as signals acquired at high speeds are distorted by the sensor's resonant vibrations.
Certification of Origin and Brands Competition
Creators: name: Chambolle, Claire
name: Giraud-Heraud, Eric
name: Chambolle, Claire
name: Giraud-Heraud, Eric
Publisher: name: Unknown
Year: 2002
Subjects: subject: Demand and Price Analysis
subject: Certification of origin
subject: Quality
subject: international competition

description: We analyse the competition in quality and quantity between a foreign firm and a domestic firm. The domestic firm can belong to a certification of origin, whereas its rival uses a pure brand strategy. We will show how the certification can allow the domestic firm to position itself as a high quality producer and improve the average quality of the products offered on the market. If, however, the certified firm offers the low quality good, the certification can permit it to guarantee a higher profit than that of its competitor and to improve the consumers' surplus by favouring product standardisation.
Superconducting radio-frequency cavity fault classification using machine learning at Jefferson Laboratory
Creators: name: Tennant, Chris
name: Carpenter, Adam
name: Powers, Tom
name: Solopova, Anna Shabalina
name: Vidyaratne, Lasitha
name: Iftekharuddin, Khan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We report on the development of machine learning models for classifying C100 superconducting radio-frequency (SRF) cavity faults in the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab. CEBAF is a continuous-wave recirculating linac utilizing 418 SRF cavities to accelerate electrons up to 12 GeV through 5-passes. Of these, 96 cavities (12 cryomodules) are designed with a digital low-level RF system configured such that a cavity fault triggers waveform recordings of 17 RF signals for each of the 8 cavities in the cryomodule. Subject matter experts (SME) are able to analyze the collected time-series data and identify which of the eight cavities faulted first and classify the type of fault. This information is used to find trends and strategically deploy mitigations to problematic cryomodules. However manually labeling the data is laborious and time-consuming. By leveraging machine learning, near real-time (rather than post-mortem) identification of the offending cavity and classification of the fault type has been implemented. We discuss performance of the ML models during a recent physics run. Results show the cavity identification and fault classification models have accuracies of 84.9% and 78.2%, respectively.
description: 20 pages, 10 figures submitted to Physical Review Accelerators and Beams
Spanish Demand for Food Away From Home: A Panel Data Approach
Creators: name: Angulo, Ana Maria
name: Gil, Jose Maria
name: Mur, Jesus
name: Angulo, Ana Maria
name: Gil, Jose Maria
name: Mur, Jesus
Publisher: name: Unknown
Year: 2002
Subjects: subject: Consumer/Household Economics
subject: Demand for food away from home
subject: household production theory
subject: panel data.

description: In this paper, the Spanish demand for food away from home is analysed. A panel data set is built and appropriate techniques for estimating limited dependent variable models have been applied. Results indicate that where there are zero expenditures, these are largely due to infrequency of purchase rather than to abstention or to economic reasons. Furthermore, important differences appear among households. On the one hand, those households whose head is a highly-educated person, male, young and living on a salary in a large town are more likely to purchase food away from home. On the other hand, increases in income only provokes more than proportional increases in expenditure for those households headed by an unschooled person, a female or a person older than 55 and also for those households with more than half of its members older than 60 years.
The Direct Economic Effects of Stricter Standards Towards the Protection of Human and Animal Health in Swine Sector
Creators: name: Mora, Cristina
name: Menozzi, Davide
name: Mora, Cristina
name: Menozzi, Davide
Publisher: name: Unknown
Year: 2004
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Human health
subject: Animal health
subject: Standards
subject: Economic impact

description: The objective of this study is to present the results of a research carried out on a group of farms involved in pig fattening (48 farms) to evaluate the economic impact of implementing human and animal health regulation. The five types considered in any case represent 90-95% of the total health costs, there are therefore economies of scale and considering the types of expenditure, veterinary medicines have a strong incidence on fattening farms, together with medicated feed for consumption on the farm and the control of Aujeszky's disease. The overall health costs have on average reached the 2% of total costs and the same value of the net income.
The Topological Non-connectivity Threshold in quantum long-range interacting spin systems
Creators: name: Borgonovi, F.
name: Celardo, G. L.
name: Trasarti-Battistoni, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Quantum characteristics of the Topological Non-connectivity Threshold (TNT), introduced in F.Borgonovi, G.L.Celardo, M.Maianti, E.Pedersoli, J. Stat. Phys., 116, 516 (2004), have been analyzed in the hard quantum regime. New interesting perspectives in term of the possibility to study the intriguing quantum-classical transition through Macroscopic Quantum Tunneling have been addressed.
description: contribution to NEXTSIGMAPHI 3rd
A possible mechanism for multiple changing look phenomenon in Active Galactic Nuclei
Creators: name: Sniegowska, M.
name: Czerny, B.
name: Bon, E.
name: Bon, N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Changing-look phenomenon observed now in a growing number of active galaxies challenges our understanding of the accretion process close to a black hole. We propose a simple explanation for the sources where multiple semi-periodic outbursts are observed, and the sources are operating at a few per cent of the Eddington limit. The outburst are caused by the radiation pressure instability operating in the narrow ring between the standard gas-dominated outer disk and the hot optically thin inner Advection-Dominated Accretion Flow. The corresponding limit cycle is responsible for periodic outbursts, and the timescales are much shorter than the standard viscous timescale due to the narrowness of the unstable radial zone. Our toy model gives quantitative predictions and works well for multiple outbursts like those observed in NGC 1566, NGC 4151, NGC 5548 and GSN 069, although the shapes of the outbursts are not yet well modeled, and further development of the model is necessary.
description: 10 pages, 10 figures. Accepted for publication in A&A. arXiv admin note: text overlap with arXiv:1904.06767
Freeman_etal_tables_figures_ESM from Faster evolution of a premating reproductive barrier is not associated with faster speciation rates in New World passerine birds
Creators: name: Freeman, Benjamin G.
name: Rolland, Jonathan
name: Montgomery, Graham A.
name: Schluter, Dolph
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences

description: Why are speciation rates so variable across the tree of life? One hypothesis is that this variation is explained by how rapidly reproductive barriers evolve. We tested this hypothesis by conducting a comparative study of the evolution of bird song, a premating barrier to reproduction. Speciation in birds is typically initiated when geographically isolated (allopatric) populations evolve reproductive barriers. We measured the strength of song as a premating barrier between closely related allopatric populations by conducting 2339 field experiments to measure song discrimination for 175 taxon pairs of allopatric or parapatric New World passerine birds, and estimated recent speciation rates from molecular phylogenies. We found evidence that song discrimination is indeed an important reproductive barrier: taxon pairs with high song discrimination in allopatry did not regularly interbreed in parapatry. However, evolutionary rates of song discrimination were not associated with recent speciation rates. Evolutionary rates of song discrimination were also unrelated to latitude or elevation, but species with innate song (suboscines) evolved song discrimination much faster than species with learned song (oscines). We conclude that song is a key premating reproductive barrier in birds, but faster evolution of this reproductive barrier between populations does not consistently result in faster diversification between species.
Tidal disruption events in the first billion years of a galaxy
Creators: name: Pfister, Hugo
name: Dai, Jane
name: Volonteri, Marta
name: Auchettl, Katie
name: Trebitsch, Maxime
name: Ramirez-Ruiz, Enrico
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Accretion of stars on massive black holes (MBHs) can feed MBHs and generate tidal disruption events (TDEs). We introduce a new physically motivated model to self-consistently treat TDEs in cosmological simulations, and apply it to the assembly of a galaxy with final mass $3\times 10^{10}\mathrm{\, M}_\odot$ at $z=6$. This galaxy exhibits a TDE rate of $\sim 10^{-5}\mathrm{\, yr}^{-1}$, consistent with local observations but already in place when the Universe was one billion year old. A fraction of the disrupted stars participate in the growth of MBHs, dominating it until the MBH reaches mass $\sim 5 \times 10^5 \mathrm{\, M}_\odot$, but their contribution then becomes negligible compared to gas. TDEs could be a viable mechanism to grow light MBH seeds, but fewer TDEs are expected when the MBH becomes sufficiently massive to reach the luminosity of, and be detected as, an active galactic nucleus. Galaxy mergers bring multiple MBHs in the galaxy, resulting in an enhancement of the global TDE rate in the galaxy by $\sim 1$ order of magnitude during $100\mathrm{\, Myr}$ around mergers. This enhancement is not on the central MBH, but caused by the presence of MBHs in the infalling galaxies. This is the first self consistent study of TDEs in a cosmological environment and highlights that accretion of stars and TDEs are a natural process occurring in a Milky~Way-mass galaxy at early cosmic times.
description: submitted to MNRAS
Additional file 2 of Investigation of the distribution of inguinal lymph nodes and delineation of the inguinal clinical target volume using 18F-FDG PET/CT
Creators: name: Han, Jia-Li
name: Qi, Yan-Ge
name: Liu, Jia-Ling
name: Yan, Xia
name: Zhang, Wan-Chun
name: Yuan, Ling
name: Hao, Xin-Zhong
name: Song, Jian-Bo
name: Li, Si-Jin
Publisher: name: figshare
Year: 2024
Subjects: Space Science
Medicine
Cell Biology
Biological Sciences not elsewhere classified

description: Supplementary Material 2
Finsleroid--Relativistic Time--Asymmetric Space and Quantized Fields
Creators: name: Asanov, G. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: For well-defined Finsleroid-relativistic space $\cE_g^{SR}$ (with the upperscript SR meaning Special-Relativistic) due only to accounting a characteristic parameter $g$ which measures the deviation of the geometry from its pseudoeuclidean precursor, the creation of the respective quantization programs for relativistic physical fields seems to be an urgent task. The parameter may take on the values over all the real range; at $g=0$ the space is reduced to become an ordinary pseudoeuclidean one. In the present work, the formulation of theory for relativistic physical fields in such a space is initiated. A general method to solve respective scalar, electromagnetic, and spinor field equations is proposed basing on the conformal flatness. At any value of the parameter, the expansion of the relativistic fields with respect to non-plane waves appeared is found, which proposes a base upon which the fields can be quantized in context of the Finsleroid-relativistic approach. Remarkably, the regulators can naturally be proposed to overcome divergences in relativistic field integrals. The respective key and basic concepts involved are presented. For short, the abbreviations FMF, FMT, and FHF will be used for the Finsleroid-relativistic metric function, the associated metric tensor, and the associated Hamiltonian function, respectively.
Assessing Food Safety Concepts on the Dairy Farm: The Case of Chemical Hazards
Creators: name: Valeeva, Natasha I.
name: Meuwissen, Miranda P.M.
name: Oude Lansink, Alfons G.J.M.
name: Bergevoet, Ron H.M.
name: Huirne, Ruud B.M.
name: Valeeva, Natasha I.
name: Meuwissen, Miranda P.M.
name: Oude Lansink, Alfons G.J.M.
name: Bergevoet, Ron H.M.
name: Huirne, Ruud B.M.
Publisher: name: Unknown
Year: 2004
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: food safety
subject: dairy farm
subject: conjoint analysis
subject: cluster analysis

description: Adaptive conjoint analysis was used to elicit farmers' and experts' preferences for attributes of improving food safety with respect to chemical hazards on the dairy farm. Groups of respondents were determined by cluster analysis based on similar farmers' and experts' perceptions of food safety improvement. Results show differences in priority of the more important attributes. However, respondents in all groups valued "identification of treated cows" as one of the most important attributes. The results provide the processing industry and extension service with a better understanding of aspects that may form farmers' perceptions of improving food safety, and thus help to define the message for targeting different farmer groups.
Non-stationary Rayleigh-Taylor instability in supernovae ejecta
Creators: name: Ribeyre, Xavier
name: Hallo, Ludovic
name: Tikhonchuk, Vladimir
name: Bouquet, Serge
name: Sanz, Javier
Publisher: name: arXiv
Year: 2005
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Astrophysics (astro-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The Rayleigh-Taylor instability plays an important role in the dynamics of several astronomical objects, in particular, in supernovae (SN) evolution. In this paper we develop an analytical approach to study the stability analysis of spherical expansion of the SN ejecta by using a special transformation in the co-moving coordinate frame. We first study a non-stationary spherical expansion of a gas shell under the pressure of a central source. Then we analyze its stability with respect to a no radial, non spherically symmetric perturbation of the of the shell. We consider the case where the polytropic constant of the SN shell is $γ=5/3$ and we examine the evolution of a arbitrary shell perturbation. The dispersion relation is derived. The growth rate of the perturbation is found and its temporal and spatial evolution is discussed. The stability domain depends on the ejecta shell thickness, its acceleration, and the perturbation wavelength.
description: 16 pages
INVENTÁRIO DE PERCEPÇÃO DE FATORES E RISCOS PSICOSSOCIAIS: INTERSUBJETIVIDADES NAS RELAÇÕES DE TRABALHO
Creators: name: Cabanha, Samuel
Publisher: name: figshare
Year: 2020
Subjects: subject: 170107 Industrial and Organisational Psychology
subject: FOS: Psychology

description: Artigo publicado em evento.
Classical singularities and Semi-Poisson statistics in quantum chaos and disordered systems
Creators: name: Garcia-Garcia, A. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We investigate a 1D disordered Hamiltonian with a non analytical step-like dispersion relation whose level statistics is exactly described by Semi-Poisson statistics(SP). It is shown that this result is robust, namely, does not depend neither on the microscopic details of the potential nor on a magnetic flux but only on the type of non-analyticity. We also argue that a deterministic kicked rotator with a non-analytical step-like potential has the same spectral properties. Semi-Poisson statistics (SP), typical of pseudo-integrable billiards, has been frequently claimed to describe critical statistics, namely, the level statistics of a disordered system at the Anderson transition (AT). However we provide convincing evidence they are indeed different: each of them has its origin in a different type of classical singularities.
description: typos corrected, 4 pages, 3 figures
Consumers' Willingness to Pay for Additional Information on Food Quality and Safety
Creators: name: Latvala, Terhi
name: Kola, Jukka
name: Latvala, Terhi
name: Kola, Jukka
Publisher: name: Unknown
Year: 2004
Subjects: subject: Consumer/Household Economics
subject: Food Consumption/Nutrition/Food Safety
subject: beef
subject: information
subject: credence attributes
subject: willingness to pay

description: Most quality properties of food products can be considered as credence characteristics, quality of which cannot be inferred before the purchase, and sometimes not even after the purchase. Our objective is to assess how much consumers are willing to pay (WTP) for meat products, of which e.g. origins and production practices are known, especially with regard to safety issues. Results indicate that 59 % of Finnish consumers are willing to pay more to get information about safety and quality of beef products. Consumers are most concerned with diseases caused by food of animal origin.
On the effect of repulsive interactions on Bose-Einstein condensation in the Luttinger-Sy model
Creators: name: Kerner, Joachim
name: Pechmann, Maximilian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 82B44, 81V70, 82B10

description: In this paper we investigate the effect of repulsive pair interactions on Bose-Einstein condensation in a well-established random one-dimensional system known as the Luttinger-Sy model at positive temperature. We study separately hard core interactions as well as a class of more general repulsive interactions, also allowing for a scaling of certain interaction parameters in the thermodynamic limit. As a main result, we prove in both cases that for sufficiently strong interactions all eigenstates of the non-interacting one-particle Luttinger-Sy Hamiltonian as well as any sufficiently localized one-particle state are almost surely not macroscopically occupied.
Solving the neutrino parameter degeneracy by measuring the T2K off-axis beam in Korea
Creators: name: Hagiwara, Kaoru
name: Okamura, Naotoshi
name: Senda, Ken-ichi
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The T2K neutrino oscillation experiment will start in 2009. In this experiment the center of the neutrino beam from J-PARC at Tokai village will go through underground beneath Super-Kamiokande, reach the sea level east of Korean shore, and an off-axis beam at $0.5^{\circ}$ to $1.0^{\circ}$ can be observed in Korea. We study physics impacts of putting a 100 kt-level Water \cerenkov detector in Korea during the T2K experimental period. For a combination of the $3^{\circ}$ off-axis beam at SK with baseline length L = 295 km and the $0.5^{\circ}$ off-axis beam in the east coast of Korea at L = 1000 km, we find that the neutrino mass hierarchy (the sign of $m^2_{3} - m^2_1$) can be resolved and the CP phase of the MNS unitary matrix can be constrained uniquely at 3-$σ$ level when \sin^2 2θ_{\rm rct} $ \ge 0.06 $.
Helium abundances and its radial gradient from the spectra of HII regions and ring nebulae of the Milky Way
Creators: name: Méndez-Delgado, J. E.
name: Esteban, C.
name: García-Rojas, J.
name: Arellano-Córdova, K. Z.
name: Valerdi, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We determine the radial abundance gradient of helium in the disc of the Galaxy from published spectra of 19 $\text{H}\thinspace \text{II}$ regions and ring nebulae surrounding massive O stars. We revise the Galactocentric distances of the objects considering {\it Gaia} DR2 parallaxes and determine the physical conditions and the ionic abundance of He$^{+}$ in a homogeneous way, using between 3 and 10 $\text{He}\thinspace \text{I}$ recombination lines in each object. We estimate the total He abundance of the nebulae and its radial abundance gradient using four different ICF(He) schemes. The slope of the gradient is always negative and weakly dependent on the ICF(He) scheme, especially when only the objects with log($η$) $
description: 18 pages, 6 figures (one of these figures has 4 subfigures). This paper has been accepted today (11/06/2020) in MNRAS
Avaliação de Produtos e Serviços de Informação
Creators: name: Guimarães, Ana Cristina Dudziak
Publisher: name: figshare
Year: 2020
Subjects: subject: Library and Information Studies
subject: FOS: Media and communications

description: Este trabalho, apresentado no SNBU (2012) visa demonstrar como a avaliação dos produtos e serviços feita através da análise quantitativa pode ser importante, não para mensurar o quanto são usados, mas para dar uma noção mais exata do alcance que possuem dentro da comunidade acadêmica.
Government intervention modeling in microeconomic company market evolution
Creators: name: Chorowski, Michał
name: Kutner, Ryszard
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Finance (q-fin.GN)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: Modern technology and innovations are becoming more crucial than ever for the survival of companies in the market. Therefore, it is significant both from theoretical and practical points of view to understand how governments can influence technology growth and innovation diffusion (TGID) processes. We propose a simple but essential extension of Ausloos-Clippe-Pȩkalski and related Cichy numerical models of the TGID in the market. Both models are inspired by the nonlinear non-equilibrium statistical physics. Our extension involves a parameter describing the probability of government intervention in the TGID process in the company market. We show, using Monte Carlo simulations, the effects interventionism can have on the companies' market, depending on the segment of firms that are supported. The high intervention probability can result, paradoxically, in the destabilization of the market development. It lowers the market's technology level in the long-time limit compared to markets with a lower intervention parameter. We found that the intervention in the technologically weak and strong segments of the company market does not substantially influence the market dynamics, compared to the intervention helping the middle-level companies. However, this is still a simple model which can be extended further and made more realistic by including other factors. Namely, the cost and risk of innovation or limited government resources and capabilities to support companies.
description: submitted to Acta Physica Polonica A, Proceedings of the 10th Polish Symposium of Physics in Economy and Social Sciences FENS, 3-5 July 2019, Otwock - Swierk
Additional file 1 of How to interpret Jiangnan gardens: a study of the spatial layout of Jiangnan gardens from the perspective of fractal geometry
Creators: name: Sun, Ce
name: Jiang, Zhenyu
name: Yu, Bingqin
Publisher: name: figshare
Year: 2024
Subjects: subject: Biophysics
subject: Space Science
subject: Medicine
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Mathematical Sciences not elsewhere classified
subject: Cancer
subject: Hematology

description: Additional file 1.
Quantization of the charge in Coulomb plus harmonic potential
Creators: name: Choun, Yoon-Seok
name: Sin, Sang-Jin
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider two models where the wave equation can be reduced to the effective Schrödinger equation whose potential contains both harmonic and the Coulomb terms, $ω^{2}r^{2}-a/r$. The equation reduces to the biconfluent Heun's equation, and we find that the charge as well as the energy must be quantized and state dependent. We also find that two quantum numbers are necessary to count radial degrees of freedom and suggest that this is a general feature of differential equation with higher singularity like the Heun's equation.
description: 5 pages, 7 figures
$πη$ pair hard electroproduction and exotic hybrid mesons
Creators: name: Anikin, I. V.
name: Pire, B.
name: Szymanowski, L.
name: Teryaev, O. V.
name: Wallon, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that hard electroproduction is a promising way to study exotic hybrid mesons, in particular through the hybrid decay channel $H \to πη$. We discuss the $πη$ generalized distribution amplitude, calculate the production amplitude and propose a forward-backward asymmetry as a signal for the hybrid meson production.
description: 4 pages, 1 figure, presented by I.V. Anikin at Xth International Conference "BARYONS'04", Palaiseau, France
Anisotropic Strange Stars through Embedding Technique in Massive Brans-Dicke Gravity
Creators: name: Sharif, M.
name: Majid, Amal
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper investigates the existence and properties of anisotropic strange quark stars in the context of massive Brans-Dicke theory. The field equations are constructed in Jordan frame by assuming a suitable potential function with MIT bag model. We employ the embedding class-one approach as well as junction conditions to determine the unknown metric functions. Radius of the strange star candidate, LMC X-4, is predicted through its observed mass for different values of the bag constant. We analyze the effects of coupling parameter as well as mass of scalar field on state determinants and execute multiple checks on the stability and viability of the spherical system. It is concluded that the resulting stellar structure is physically viable and stable as it satisfies the energy conditions as well as essential stability criteria.
description: 25 pages, 9 figures, to appear in EPJP
Centro de Memória da Biblioteca Florestan Fernandes - FFLCH/USP: uma proposta para a descrição de seus conteúdos digitais.
Creators: name: Guimarães, Ana Cristina Dudziak
name: Vasconcellos, Martha Ribeiro Neves De
name: Kátia Maria Bruno Ferreira
Publisher: name: figshare
Year: 2020
Subjects: subject: Library and Information Studies
subject: FOS: Media and communications

description: O acervo da memória da Biblioteca Florestan Fernandes, da Faculdade de Filosofia, Letras e Ciências Humanas da Universidade de São Paulo, reúne fotos, boletins, clippings, panfletos, vídeos e objetos tridimensionais que representam a sua trajetória histórica ao longo dos anos. Este projeto de resgate de memória visa apresentar uma proposta de criação de um conjunto de metadados que melhor descreva cada recurso, após sua digitalização, facilitando a recuperação e a troca de informações entre sistemas. Utilizou-se como procedimento metodológico a pesquisa bibliográfica sobre os assuntos relacionados ao tema, um estudo exploratório de observação direta dos itens existentes e a análise dos padrões Dublin Core, PBCore e VRACore para a escolha dos elementos, resultando na apresentação de um esquema de metadados descritivos para os conteúdos dos recursos, com seus elementos e esquemas associados. Determinou-se 35 metadados capazes de representar os objetos digitais e seus conteúdos. Constatou-se que a combinação dos padrões permitiu uma descrição mais apropriada para cada item digital da memória, segundo suas características e o púbico alvo ao qual se destina.
Costs and Benefits of Two Alternative Salmonella Control Policies in Finnish Broiler Production
Creators: name: Kangas, Susanna
name: Lyytikainen, Tapani
name: Peltola, Jukka
name: Ranta, Jukka
name: Maijala, Riitta
name: Kangas, Susanna
name: Lyytikainen, Tapani
name: Peltola, Jukka
name: Ranta, Jukka
name: Maijala, Riitta
Publisher: name: Unknown
Year: 2004
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Salmonella
subject: broiler
subject: cost-benefit
subject: control

description: In this study, costs and benefits of two Salmonella control options in broiler production were compared. The first option was to control Salmonella as set by Council Directive 92/117/EEC, so-called Zoonosis Directive. The second option was more intense control programme, the so-called Finnish Salmonella control programme. The costs of controlling Salmonella in primary and secondary production and the direct and indirect losses due to Salmonella infection in humans in both options were compared. The national control option was found to be economically feasible. One prevented loss of life covered all the control costs of the national programme.
Gauge Principle and Gauge Invariance in Quantum Two-Level Systems
Creators: name: Savasta, Salvatore
name: Di Stefano, Omar
name: Settineri, Alessio
name: Zueco, David
name: Hughes, Stephen
name: Nori, Franco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum Rabi model is a widespread description for the coupling between a two-level system and a quantized single mode of an electromagnetic resonator. Issues about this model's gauge invariance have been raised. These issues become evident when the light-matter interaction reaches the so-called ultrastrong coupling regime. Recently, a modified quantum Rabi model able to provide gauge-invariant physical results in any interaction regime was introduced [Nature Physics 15, 803 (2019)]. Here we provide an alternative derivation of this result, based on the implementation in two-state systems of the gauge principle, which is the principle from which all the fundamental interactions in quantum field theory are derived. The adopted procedure can be regarded as the two-site version of the general method used to implement the gauge principle in lattice gauge theories. Applying this method, we also obtain the gauge-invariant quantum Rabi model for asymmetric two-state systems, and the multi-mode gauge-invariant quantum Rabi model beyond the dipole approximation.
description: 10 pages, 2 figures
Analysing Consumer Responses to Food Safety Results of a Survey in the Netherlands
Creators: name: Dagevos, Hans
name: Hansman, Harrie
name: Dagevos, Hans
name: Hansman, Harrie
Publisher: name: Unknown
Year: 2004
Subjects: subject: Consumer/Household Economics
subject: Food Consumption/Nutrition/Food Safety
subject: food safety
subject: consumer concerns
subject: risk perception
subject: attitude

description: Consumer confidence in food safety appears to be under pressure as a result of several food scandals and food scares in recent years. Regaining the trust of food consumers in food production and food products is talk of the town in both government buildings and agribusiness offices. Instead of talking about consumers, this article is first and foremost about what consumers themselves think and feel about food safety. The foundation of this research is a survey among nearly 1100 Dutch consumers. Investigation focuses on food safety from the consumer's perspective in which food safety is examined comprehensively. This manifests itself in the dependent variables this research takes into consideration. With respect to the independent variables, multivariate analysis shows that both classic, socio-economic variables such as age or income, and modern variables of a socio-cultural origin are relevant in analysing and understanding contemporary food consumers.
The Limits of Resolution and Dose for Aberration-Corrected Electron Tomography
Creators: name: Yalisove, Reed
name: Sung, Suk Hyun
name: Ercius, Peter
name: Hovden, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Aberration-corrected electron microscopy can resolve the smallest atomic bond-lengths in nature. However, the high-convergence angles that enable spectacular resolution in 2D have unknown 3D resolution limits for all but the smallest objects ($< \sim$8nm). We show aberration-corrected electron tomography offers new limits for 3D imaging by measuring several focal planes at each specimen tilt. We present a theoretical foundation for aberration-corrected electron tomography by establishing analytic descriptions for resolution, sampling, object size, and dose---with direct analogy to the Crowther-Klug criterion. Remarkably, aberration-corrected scanning transmission electron tomography can measure complete 3D specimen structure of unbounded object sizes up to a specified cutoff resolution. This breaks the established Crowther limit when tilt increments are twice the convergence angle or smaller. Unprecedented 3D resolution is achievable across large objects. Atomic 3D imaging (1$\unicode{xC5}$) is allowed across extended objects larger than depth-of-focus (e.g. $>$ 20nm) using available microscopes and modest specimen tilting ($
John Horton Conway - Bibliography from JOHN HORTON CONWAY. 26 December 1937 — 11 April 2020
Creators: name: Curtis, Robert Turner
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: 10101 Algebra and Number Theory
subject: FOS: Mathematics
subject: 10199 Pure Mathematics not elsewhere classified

description: John Conway was without doubt one of the most celebrated British mathematicians of the last half century. He first gained international recognition in 1968 when he constructed the automorphism group of the then recently-discovered Leech lattice, and in so doing discovered three new sporadic simple groups. At around the same time he invented The Game of Life, which brought him to the attention of a much wider audience and led to a cult following of Lifers. He also combined the methods of Cantor and Dedekind for extending number systems to construct what Donald Knuth (ForMemRS 2003) called ‘surreal numbers’, the achievement of which Conway was probably most proud. Throughout his life he continued to make significant contributions to many branches of mathematics, including number theory, logic, algebra, combinatorics and geometry, and in his later years he teamed up with Simon Kochen to produce the Free Will theorem, which asserts that if humans have free will then, in a certain sense, so do elementary particles. In this biographical memoir I attempt to give some idea of the depth and breadth of Conway's contribution to mathematics.
Optimized suppression of coherent noise from seismic data using the Karhunen-Loeve transform
Creators: name: Montagne, Raul
name: Vasconcelos, Giovani L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Signals obtained in land seismic surveys are usually contaminated with coherent noise, among which the ground roll (Rayleigh surface waves) is of major concern for it can severely degrade the quality of the information obtained from the seismic record. Properly suppressing the ground roll from seismic data is not only of great practical importance but also remains a scientific challenge. Here we propose an optimized filter based on the Karhunen--Loéve transform for processing seismic data contaminated with ground roll. In our method, the contaminated region of the seismic record, to be processed by the filter, is selected in such way so as to correspond to the maximum of a properly defined coherence index. The main advantages of the method are that the ground roll is suppressed with negligible distortion of the remanent reflection signals and that the filtering can be performed on the computer in a largely unsupervised manner. The method has been devised to filter seismic data, however it could also be relevant for other applications where localized coherent structures, embedded in a complex spatiotemporal dynamics, need to be identified in a more refined way.
description: 9 pages, 12 figures
Engineering the magnetocaloric properties of PrVO3 epitaxial oxide thin films by strain effects
Creators: name: Bouhani, Hamza
Publisher: name: figshare
Year: 2020
Subjects: subject: Condensed Matter Physics
subject: FOS: Physical sciences
subject: 20404 Electronic and Magnetic Properties of Condensed Matter; Superconductivity
subject: Entropy
subject: Quantum Mechanics
subject: 20499 Condensed Matter Physics not elsewhere classified
subject: 29902 Complex Physical Systems
subject: Applied Physics

description: Combining multiple degrees of freedom in strongly correlated materials such as transition-metal oxides would lead to fascinating magnetic and magnetocaloric features. Herein, the strain effects are used to markedly tailor the magnetic and magnetocaloric properties of PrVO3 thin films. The selection of an appropriate thickness and substrate enables us to dramatically decrease the coercive magnetic field from 2.4 T previously observed in sintered PVO3 bulk to 0.05 T for compressive thin films making from the PrVO3 compound a nearly soft magnet. This is associated with a marked enhancement of the magnetic moment and the magnetocaloric effect that reaches unusual maximum values of roughly 4.86 μB and 56.8 J/kg K with the magnetic field change of 6 T applied in the sample plane in the cryogenic temperature range (3 K), respectively. This work strongly suggests that taking advantage of different degrees of freedom and the exploitation of multiple instabilities in a nanoscale regime is a promising strategy for unveiling unexpected phases accompanied by a large magnetocaloric effect in oxides.
Using distant globular clusters as a test for gravitational theories
Creators: name: Baumgardt, H.
name: Grebel, E. K.
name: Kroupa, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose to determine the stellar velocity dispersions of globular clusters in the outer halo of the Milky Way in order to decide whether the dynamics of the universe on large scales is governed by dark matter or modified Newtonian dynamics (MOND). We show that for a number of galactic globular clusters, both the internal and the external accelerations are significantly below the critical acceleration parameter $a_0$ of MOND. This leads to velocity dispersions in case of MOND which exceed their Newtonian counterparts by up to a factor of 3, providing a stringent test for MOND. Alternatively, in case high velocity dispersions are found, these would provide the first evidence that globular clusters are dark matter dominated.
description: 5 pages, 1 figure, accepted for publication in MNRAS
Towards Dynamic Algorithm Selection for Numerical Black-Box Optimization: Investigating BBOB as a Use Case
Creators: name: Vermetten, Diederick
name: Wang, Hao
name: Doerr, Carola
name: Bäck, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: One of the most challenging problems in evolutionary computation is to select from its family of diverse solvers one that performs well on a given problem. This algorithm selection problem is complicated by the fact that different phases of the optimization process require different search behavior. While this can partly be controlled by the algorithm itself, there exist large differences between algorithm performance. It can therefore be beneficial to swap the configuration or even the entire algorithm during the run. Long deemed impractical, recent advances in Machine Learning and in exploratory landscape analysis give hope that this dynamic algorithm configuration~(dynAC) can eventually be solved by automatically trained configuration schedules. With this work we aim at promoting research on dynAC, by introducing a simpler variant that focuses only on switching between different algorithms, not configurations. Using the rich data from the Black Box Optimization Benchmark~(BBOB) platform, we show that even single-switch dynamic Algorithm selection (dynAS) can potentially result in significant performance gains. We also discuss key challenges in dynAS, and argue that the BBOB-framework can become a useful tool in overcoming these.