bluuebunny/crossref_metadata_2025_split huggingface dataset:
A influência da ferramenta digital “Google Tradutor” no processo de aprendizagem de língua inglesa
Authors: Costa Thaís Bernardes 
Published: February 2017

Prensky (2001) afirma que a nova geração está habituada ao uso de tecnologias e a receber e assimilar informações rapidamente; são nomeados “nativos digitais”. A aprendizagem de língua inglesa nesse contexto digital tem se justificado, principalmente, pelo seu status de língua global e por ser um instrumento de comunicação entre diferentes culturas. Dessa maneira, propomos analisar o processo de aprendizagem de língua inglesa através da ferramenta online “Google Tradutor” por um nativo digital de uma escola municipal de Uberaba (MG). Para tal propósito, recorremos ao termo affordance (GIBSON, 1981), conceito utilizado na área de Linguística Aplicada, que diz respeito às diferentes formas como o indivíduo utiliza e percebe um ambiente. Sendo assim, acreditamos que os ambientes online são propícios para a efetivação de diferentes affordances. Além disso, Benson (1997) afirma que ambientes extraclasse (defendemos que isso inclui a internet) contribuem para a autonomia na aprendizagem. Através de questionários e de uma entrevista com um aprendiz de língua inglesa contendo relatos de experiências com o uso dessa ferramenta, concluímos que ele percebe e efetiva diferentes affordances por meio do “Google Tradutor”. Ainda, percebemos que esse aprendiz, foco do estudo, não constitui-se um sujeito autônomo na sua aprendizagem de língua inglesa.
EinFach Logistik. Nauczanie niemieckiego języka logistyki – źródła inspiracji oraz nowe wyzwania dla logistyków i germanistów
Authors: Górski Karol , Janiak Tomasz 
Published: February 2017

Driven by sociolinguistic inspirations, the authors make an attempt to assess the teaching of German logistics language in Poland for professional purposes against a broadly understood logistic education and emphasize the aspect of close correlation of the linguistic training outcome with the labor market demand. The intention of the authors is to highlight an important component of the education environment, namely the need to interrelate the proper content-oriented knowledge with linguistic skills of the logistic secondary school students and the university level students dealing with logistics.
Efficacy of Phytogenic Feed Additive on Performance, Production and Health Status of Monogastric Animals – A Review
Authors: Upadhaya Santi Devi , Kim In Ho 
Published: February 2017

AbstractThe growing concerns of consumers on the use of antibiotic as a growth promoter in livestock feed have fueled the interest in alternative products. In the recent years a group of natural products known as phytogenics has been a focus of several studies. Phytogenics are a heterogeneous group of feed additives originating from plants and consist of herbs, spices, fruit, and other plant parts. These feed additives are reported to have a wide range of activities including antimicrobial, anthelminthic, antioxidant, growth enhancer, and immune modulator. Besides these properties they are also reported to stimulate feed intake and endogenous secretion and enhance production. They include many different bio-active ingredients such as alkaloids, bitters, flavonoids, glycosides, mucilage, saponins, tannins phenolics, polyphenols, terpenoids, polypeptide, thymol, cineole, linalool, anethole, allicin, capsaicin, allylisothiocyanate, and piperine. These feed additives have been tested in the form of extracts, cold pressed oils, essential oils in a number of animals but the results are variable. Therefore, their application as feed additive has been limited, largely owing to their inconsistent efficacy and lack of full understanding of the modes of action. The future of these feed additives depend on the characteristics of herbs, the knowledge on their major and minor constituents, the in-depth knowledge on their mode of action and their value based on the safety to animal and their products. The aim of this review is to summarize on the current knowledge on the use of phytogenic as a feed additive in monogastric animals.
Differential expression of miR-145, miR-429 and its target genes in partial reproductive tissues of swine with high and low litter size
Authors: Zhang Xiao-Dong , Feng Yi-Fang , Zhang Xu , Tian Mi , Wu Tao , Ye Peng-Fei , Zhang Wei , Ding Yue-Yun , Yin Zong-Jun , Chu Ming-Xing 
Published: February 2017

Abstract
To justify the function of miRNAs in reproductive regulation in swine, the expression of miR-145, miR-429 and their related genes were studied in reproductive tissues of sows. Wannan black pig and Yorkshire pigs with extremely high (n=6) and low (n=6) litter size were sampled, and real-time quantitative PCR (qPCR) was performed on tissue samples from ovaries, uterus, oviduct, hypothalamus, and pituitary. The results indicated that miR-145, miR-429, and zinc finger E-box binding homeobox 1 gene (ZEB1) were expressed significantly different in Wannan black pig and Yorkshire pigs. In pigs with different fecundity, miR-145 in the uterus was expressed significantly lower in pigs with high litter size, than in pigs with low litter size. The miR-429 expression in the oviduct and pituitary of pigs with high litter size was significantly higher compared with tissues sampled from pigs with low litter size. The ZEB1 expression in the pituitary was lower in pigs with high litter size in comparison to pigs with low litter size, while luteinizing hormone beta subunit (LHβ) showed the opposite pattern of expression. In conclusion, miR-145 and miR-429 were differently expressed in pigs with high and low litter size and might have a role in affecting litter size of sows.
Effect of temperament on performance of primiparous dairy cows
Authors: Sawa Anna , Bogucki Mariusz , Neja Wojciech , Krężel-Czopek Sylwia 
Published: February 2017

Abstract
This study was designed to analyse the effect of milking behaviour (temperament) of primiparous dairy cows on their milk and reproductive performance as well as survival to the second lactation. Milk performance, reproductive performance and culling data on 12028 Polish Holstein-Friesian primiparous dairy cows were acquired from the SYMLEK database. Using the methodology of the Polish Federation of Cattle Breeders and Dairy Farmers, the temperament of the cows was assessed as: 1 - calm, 2 - normal, 3 - excitable or aggressive. Primiparous cows from the analysed population were characterized by averagely normal temperament and optimal milking speed. Daily and lactation yield depended (P≤0.01) on the temperament of cows. Excitable (aggressive) cows had higher daily and lactation yield compared to normal and calm cows. The temperament trait was found to correlate (P≤0.01) also with functional traits such as milking speed, survival to the second lactation, and culling level. As milking speed increased, the proportion of cows with calm temperament decreased and that of excitable (aggressive) primiparous cows increased. As the temperament score increased, so did the proportion of primiparous cows sold for further breeding. Excitable (aggressive) primiparous cows had the lowest chance of survival to the second calving.
Comparative response of IgA and IgG activity and hematological parameters among four main beef-cattle breeds infected with gastrointestinal nematodes in the warm humid tropic of Mexico
Authors: González-Garduño Roberto , López Arellano María E. , Mendoza de Gives Pedro , García Javier Arece , Marie-Magdeleine Carine , Hernández Glafiro Torres , Hernández Jorge Oliva , Hinojosa-Cuéllar J. Alfonso 
Published: February 2017

Abstract
This study determined the immunoglobulin (A and G) activity against gastrointestinal nematodes (GIN) and also the hematological parameters in four beef-calf breeds naturally infected in a tropical region of Mexico. Thirty-six infected calves were used to determine the fecal nematode egg counts (FEC), the IgA and IgG activity in serum and saliva, the packed cell volume (PCV), the plasmatic protein (PP) and the differential leukocyte counts. These parameters were measured for a five-month period. ELISA assay was performed using adult worm crude antigen (AWCA) from Haemonchus contortus, Trichostrongylus colubriformis, Mecistocirrus digitatus and Cooperia punctata. The variables were analyzed using a fixed model according to the breed group. The FEC records (means ± standard deviation) for the different breeds were: Brangus (122±115), Charolais (391±507), Guzerat (294±326) and Brown Swiss (413±395). No statistical differences (P>0.05) were found among breeds. Cooperia and Haemonchus were the main identified genera in the coprocultures. Differences in hematological parameters were observed among breeds (P<0.01); Guzerat showed the highest PCV (42.6±4.7%). The lowest leukocyte counts were observed in the Charolais breed (9.2±2.4 × 109 cells L-1). Differences between Guzerat and Charolais were only detected in eosinophils, neutrophils and lymphocytes. Increased activity of IgA was observed against M. digitatus (21% OD) compared with the response against C. punctata in serum samples (13% OD). The lowest IgA activity in serum and saliva was found in Guzerat calves. Charolais and Brown Swiss showed the highest IgA activity in serum and the highest value in saliva was found in Brangus.
Rye non-starch polysaccharides: their impact on poultry intestinal physiology, nutrients digestibility and performance indices – a review
Authors: Bederska-Łojewska Dorota , Świątkiewicz Sylwester , Arczewska-Włosek Anna , Schwarz Tomasz 
Published: February 2017

Abstract
A high content of non-starch polysaccharides (NSP), namely arabinoxylans (AX), in rye is a reason for the potential adverse effect of this grain on intestinal functions, gut microflora, absorption of nutrients and performance indices. As such, the use of rye grain in intensively produced poultry diets is limited. However, recently developed new types of hybrid rye are characterised not only by increased yield potential, resistance to fungus and pests and low production costs, but also the content of antinutritive substances may be reduced in these varieties. The aim of this paper is to discuss the mechanisms of NSP effects in the digestive tract, as well as to review the results of recent studies on the use of rye in poultry nutrition. Based on the literature data, it can be concluded that the use of new hybrid rye varieties with decreased NSP concentration and NSP-hydrolising enzymes may be a way of increasing the share of rye grain in poultry diets.
Radio Interferometric Research of Ionosphere by Signals of Space Satellites
Authors: Dugin N. , Antipenko A. , Bezrukovs V. , Gavrilenko V. , Dementjev A. , Lesins A. , Nechaeva M. , Shmeld I. , Snegirev S. , Tikhomirov Yu. , Trokss J. 
Published: February 2017

AbstractSince 2012, the Radiophysical Research Institute and the Lobachevsky State University at Nizhny Novgorod, Russia and the Ventspils International Radio Astronomy Centre at Irbene, Latvia are making radio interferometric experiments on study of ionosphere parameters in a quiet (natural) state of medium and research of artificial turbulence of the ionosphere, heated by the emission from the SURA facility. Remote diagnostics of the ionosphere is implemented using a method of radio sounding by signals of navigation satellites in combination with the Very Long Baseline Interferometry (VLBI) method. As a result of spectral and correlation analysis, interferometric responses of the two-element (RRI–UNN) and three-element (RRI–UNN–Irbene) interferometers were received by observations of 12 satellites of the navigation systems GLONASS and GPS. Here the first results are reported.
On the Spectrum of Extremely Metal-Poor Star HD 52961
Authors: Kipper Tõnu 
Published: February 2017

Abstract
High resolution spectra of the extremely metal-poor star HD 52961 are investigated. The atmospheric parameters found are: T
eff = 6000 ± 100 K, log g = 0.5±0.5, ξ
t = 6.8 km s−1, [Fe/H] = −4.50±0.20. The carbon abundance is close to the solar one, [C/H] = −0.17±0.12. At the same time abundances of heavy refractory elements are very low. The chemical composition and atmospheric parameters have not changed compared to the first observations of the star about 20 years ago, contrary to expectation of dissolving the peculiarities by mass-loss during a relatively short time. We also find evidence of ongoing mass-loss in this post-AGB star with a rate of Ṁ ≈ 5 · 10−6
M
⊙ yr−1.
Pulsation of IU Per from the Ground-based and ‘Integral’ Photometry
Authors: Kundra E. , Hric L. , Gális R. 
Published: February 2017

Abstract
IU Per is an eclipsing semi-detached binary with a pulsating component. Using our own ground-based, as well as INTEGRAL satellite photometric observations in the B and V passbands, we derived geometrical and physical parameters of this system. We detected the short-term variations of IU Per in the residuals of brightness after the subtraction of synthetic light curves. Analysis of these residuals enabled us to characterize and localize the source of short-term variations as the pulsations of the primary component typical to δ Scuti-type stars.
Environmental Dependence of Different Colors for the Apparent Magnitude-Limited Main Galaxy Sample of the SDSS DR7
Authors: Deng Xin-Fa , Luo Cheng-Hong , Xin Yong , Wu Ping 
Published: February 2017

Abstract
The apparent magnitude-limited Main galaxy sample of the Sloan Digital Sky Survey Data Release 7 is used to investigate the environmental dependence of u–r, u–g, g–r, r–i and i–z colors. All the five colors strongly correlate with the local environment: red galaxies tend to be located in dense regions, while blue galaxies tend to be located in low density regions. We also note that with increasing of redshift, the environmental dependence of galaxy colors becomes weaker, especially in the high redshift region (z between 0.17 and 0.20). This can be explained accepting that subsamples with high redshifts contain only luminous and red galaxies.
New Methods in Modeling of Hot Stellar Atmospheres
Authors: Sapar A. , Poolamäe R. , Sapar L. 
Published: February 2017

Abstract
In the present study we had three main aims. First to study the possibility of reducing the initial model atmosphere data to short analytical polynomials. The second was to use as the depth variable the logarithm of the local gas pressure instead the Rosseland mean. The third aim was to check the applicability of the derived formulae and proposed computation methods to obtain high precision self-consistent results in modeling hot plane-parallel stellar atmospheres. Introducing the dimensionless (reduced) local quantities θ = T/T
eff and β = P/P(T
eff) it has been shown that for hot convection-free stellar atmospheres the curves log θ versus log β reduce an initial grid of models to simple polynomials and bring forth some general features of the model stellar atmospheres. Even for stellar atmospheres having the convective zones in the deeper atmospheric layers, the outer part of the atmosphere (up to T = T
eff and for T
eff > 5000 K) can be described in the same manner by curves log θ versus log β as for the hotter stars. Iterative modeling of any hot stellar atmosphere can be started from these formulae (obtained for solar abundances), using rational polynomial ratios for P(T
eff), obtaining from these data the needed T versus P dependence. To check suitability of the formulae, the iterative correction of the model stellar atmospheres has been carried out by the traditional Unsöld-Lucy method and by the novel least squares optimization based on Levenberg-Marquardt method, followed by Broyden correction loop. It has been shown that the flux constancy obtained by it is almost 2 dex higher than obtained by the Unsöld-Lucy method. The precision estimators as criteria of the modeling algorithms self-consistency and of the computational precision level have been proposed and used.
Seven-Color Photometry and Classification of Stars in the Vicinity of the Emission Nebula Sh2-205
Authors: Čepas V. , Zdanavičius J. , Zdanavičius K. , Straižys V. , Laugalys V. 
Published: February 2017

Abstract
We present the results of CCD photometry in the seven-color Vilnius system for 922 stars down to V ~ 17 mag in a 1.5 square degree field at the northern edge of the HII region Sh2-205, at the Perseus and Camelopardalis border. Using the intrinsic color indices and photometric reddening-free Q-parameters, two-dimensional spectral types for most stars are determined.
How does the Mass Transport in Disk Galaxy Models Influence the Character of Orbits?
Authors: Zotos Euaggelos E. 
Published: February 2017

Abstract
We explore the regular or chaotic nature of orbits of stars moving in the meridional (R, z) plane of an axially symmetric time-dependent disk galaxy model with a central, spherically symmetric nucleus. In particular, mass is linearly transported from the disk to the galactic nucleus, in order to mimic, in a way, the case of self-consistent interactions of an actual N-body simulation. We thus try to unveil the influence of this mass transportation on the different families of orbits of stars by monitoring how the percentage of chaotic orbits, as well as the percentages of orbits of the main regular resonant families, evolve as the galaxy develops a dense and massive nucleus in its core. The SALI method is applied to samples of orbits in order to distinguish safely between ordered and chaotic motion. In addition, a method based on the concept of spectral dynamics is used for identifying the various families of regular orbits and also for recognizing the secondary resonances that bifurcate from them. Our computations strongly suggest that the amount of the observed chaos is substantially increased as the nucleus becomes more massive. Furthermore, extensive numerical calculations indicate that there are orbits which change their nature from regular to chaotic and vice versa and also orbits which maintain their orbital character during the galactic evolution. The present outcomes are compared to earlier related work.
Improvements in the Spherical Collapse Model and Dark Energy Cosmologies
Authors: Del Popolo A. 
Published: February 2017

AbstractIn the present paper, we study how the effects of deviations from spherical symmetry of a system, produced by angular momentum, and shear stress, influence typical parameters of the spherical collapse model, like the linear density threshold for collapse of the non-relativistic component (δc) and its virial overdensity (ΔV). The study is performed in the framework of the Einstein-de Sitter and ΛCDM models, and assuming that the vacuum component is not clustering within the homogeneous non-spherical overdensities. We start from the standard spherical top hat model (SCM) which does not take account the non-spherical effects, and we add to this model the shear term and angular momentum term, which are finally expressed in terms of the density contrast,δ. We find that the non-spherical terms change the non-linear evolution of the system and that the collapse stops “naturally” at the virial radius, differently from the standard spherical collapse model. Moreover, shear and rotation gives rise to higher values of the linear overdensity parameter and different values of ΔVwith respect to the standard spherical collapse model.
Stochastic 2-D Models of Galaxy Disk Evolution. The Galaxy M33
Authors: Mineikis T. , Vansevičius V. 
Published: February 2017

Abstract
We have developed a fast numerical 2-D model of galaxy disk evolution (resolved along the galaxy radius and azimuth) by adopting a scheme of parameterized stochastic self-propagating star formation. We explore the parameter space of the model and demonstrate its capability to reproduce 1-D radial profiles of the galaxy M33: gas surface density, surface brightness in the i and GALEX FUV passbands, and metallicity.
Outer Rings in Early-type Galaxies: From Vorontsov-Velyaminov to Present
Authors: Silchenko O. , Ilyina M. , Katkov I. 
Published: February 2017

Abstract
‘Ringed galaxies’, or disk galaxies with prominent outer ring structures, separated visually from the main galactic bodies, were discovered and intensively studied by B. A. Vorontsov-Vel’yaminov whose 110th anniversary is celebrated this year. We discuss progress reached during recent years in understanding outer ring structures of disk galaxies, in particular, the results of our spectroscopic studies on the ring gas kinematics, excitation and chemical composition.
On the Formation of Tails in the Galactic Tidal Field
Authors: Davydenko A. 
Published: February 2017

Abstract
The trajectories of stars of a cluster moving in the Schuster-Plummer potential on a circular orbit in the Galactic plane (Bok’s problem) are investigated. The impact of initial conditions on stellar motions, in particular on the possibility of escape of a star from the cluster, is analyzed, and numerous computations of stellar orbits are performed for various initial values of energy and momentum with respect to the cluster. Stars escaping from the cluster are shown to move mostly in spiral orbits and form well-defined spiral tails.
On the Possibility of Applying the Quasi-Isothermal Stäckel’s Model to Our Galaxy
Authors: Gromov A. O. , Nikiforov I. I. , Ossipkov L. P. 
Published: February 2017

AbstractAn earlier derived quasi-isothermal Stäckel’s model of mass distribution in stellar systems and the corresponding formula for space density are applied to our Galaxy. The model rotation curve is fitted to HI kinematical data. The structural and scale parameters of the model are estimated and the corresponding density contours for our Galaxy are presented.
The Evolution of a Supermassive Retrograde Binary Embedded in an Accretion Disk
Authors: Ivanov P. B. , Papaloizou J. C. B. , Paardekooper S.-J. , Polnarev A. G. 
Published: February 2017

Abstract
In this note we discuss the main results of a study of a massive binary with unequal mass ratio, q, embedded in an accretion disk, with its orbital rotation being opposed to that of the disk. When the mass ratio is sufficiently large, a gap opens in the disk, but the mechanism of gap formation is very different from the prograde case. Inward migration occurs on a timescale of t
ev ~ M
p/Ṁ, where M
p is the mass of the less massive component (the perturber), and Ṁ is the accretion rate. When q ≪ 1, the accretion takes place mostly onto the more massive component, with the accretion rate onto the perturber being smaller than, or of order of, q
1/3
Ṁ. However, this rate increases when supermassive binary black holes are considered and gravitational wave emission is important. We estimate a typical duration of time for which the accretion onto the perturber and gravitational waves could be detected.
On the Pseudo Phase-space Density of Dark Matter Haloes and the Universality of Density Profiles
Authors: Del Popolo A. 
Published: February 2017

AbstractWe examine the radial dependence of the pseudo phase-space density,ρ(r)/σ3(r), for structures on galactic and galaxy cluster scales. We find that it is approximately a power-law only in the range of halo radius resolved by current simulations (down to 0.1% of the virial radius) while it has a non-power law behavior below the quoted scale, with inner profiles changing with mass. The non-power-law behavior is more evident for halos constituted of both dark matter and baryons, while halos constituted just of dark matter are characterized by an approximately power-law behavior. The results argue against universality of the pseudo phase-space density and, as a consequence, argue against universality of density profiles constituted of dark matter and baryons as also discussed in Del Popolo (2009).