bluuebunny/crossref_metadata_2025_split huggingface dataset:
Disciplinary boundary crossings in collaborative CLIL in higher education
Authors: Bianchá Ramírez Héctor Fabio , Shah Shamir , Segura Antury Jhonny , Castro López Silvia Juliana 
Published: May 2022

Abstract
This study uses European English as a Medium of Instruction (EMI) experiences and the Boundary Crossings model
(Moore et al., 2015) as a departure point to inquire and analyse Content Teacher
(CT) perspectives about disciplinary boundary crossings in a systematic and collaborative Content and Language Integrated Learning
(CLIL) implementation in a private university in Colombia. A semi-structured interview explored the perspectives of ten CTs who
collaborated with English as a Foreign Language (EFL) teachers and a language support centre in the design and implementation of
CLIL experiences. The data were transcribed, coded and categorised with Atlas.ti. An analysis of the findings led to the
formulation of a continuum which shows that four CTs draw strict to moderate boundaries between content and language learning,
while the other six perceive these systems as an emerging, integrated whole. Some emergent pedagogical implications are also
discussed.
“Against everything and everybody”
Authors: Lobejón Santos Sergio , Gutiérrez Lanza Camino 
Published: May 2022

AbstractTheStar-Bookscollection, published by Producciones Editoriales S. A. from 1975 to 1982, is a foremost example of the post-Francoist counterculture and one of the best chronicles of this period of Spanish history. The collection became a viable platform for various national and international authors who had remained silenced for decades at a time when books were still subjected to official censorship.Star-Booksstood out for its eclectic nature and its rebellious spirit, reflected in the striking covers and themes, which clashed against Francoist orthodoxy. This paper highlights the collection’s role in promoting the counterculture in Spain and sheds light on how censorship operated in this period. Detailed analyses of the sociopolitical context, theStar-Bookscatalogue, the available censorship materials, and several collection titles show the more permissive nature of post-Francoist censorship.
Curvature invariants for accelerating Kerr–Newman black holes in (anti-)de Sitter spacetime
Authors: Kraniotis G V 
Published: May 2022

Abstract
The curvature scalar invariants of the Riemann tensor are important in general relativity because they allow a manifestly coordinate invariant characterisation of certain geometrical properties of spacetimes such as, among others, curvature singularities, gravitomagnetism. We calculate explicit analytic expressions for the set of Zakhary–McIntosh curvature invariants for accelerating Kerr–Newman black holes in (anti-)de Sitter spacetime as well as for the Kerr–Newman–(anti-)de Sitter black hole. These black hole metrics belong to the most general type D solution of the Einstein–Maxwell equations with a cosmological constant. Explicit analytic expressions for the Euler–Poincare density invariant, which is relevant for the computation of the Euler–Poincare characteristic χ(M), and the Kretschmann scalar are also provided for both cases. We perform a detailed plotting of the curvature invariants that reveal a rich structure of the spacetime geometry surrounding the singularity of a rotating, electrically charged and accelerating black hole. These graphs also help us in an exact mathematical way to explore the interior of these black holes. Our explicit closed form expressions show that the above gravitational backgrounds possess a non-trivial Hirzebruch signature density. Possible physical applications of this property for the electromagnetic duality anomaly in curved spacetimes that can spoil helicity conservation are briefly discussed.
Kinetics of processes initiated in a water cathode by the action of a direct current discharge at atmospheric pressure in air: simulation and experiment
Authors: Shutov D A , Batova N A , Smirnova K V , Ivanov A N , Rybkin V V 
Published: May 2022

Abstract
The kinetics of the formation of hydrogen peroxide, nitrate and nitrite ions and the pH of the solution, which served as the cathode, were studied under the action of a direct current discharge at atmospheric pressure in air. A 0D kinetic model has been developed that describes the reactions occurring in solution. The model includes 28 components, 119 reactions between them, as well as fluxes of particles coming to the surface of the solution from the discharge. The particle fluxes were determined from the 0D model of a discharge in air based on the self-consistent solution of the Boltzmann equation, the equations of vibrational kinetics for the ground states of N2, O2, H2O, NO molecules, and the equations of chemical kinetics. The proposed model is semi-empirical, since it includes not only known experimental kinetic data, but also some assumptions that were made to match the calculation results with experiment. An analysis of the experimental data and calculations by the model showed that the main factors initiating reactions in solution are the bombardment of the surface by a flux of positive ions accelerated in the cathode potential drop and the flux of NO molecules from the discharge. Ion bombardment leads to the formation of hydrogen peroxide, during the decomposition of which OH radicals are formed, the subsequent reactions of which determine the composition of the particles of the solution. The source of nitrogen-containing particles is the flux of NO molecules from the discharge. Data are given on the kinetics of the concentrations of the main particles of the solution and the analysis of the mechanisms of the processes of their formation and decay. The results of calculations of the concentrations of H2O2, NO2
−, NO3
−, and pH agree with the experiment within the limits of the latter’s accuracy.
Assessment of doses in contaminated urban areas: modelling exercise based on Fukushima data
Authors: Takahara Shogo , Charnock Thomas W , Silva Kampanart , Hwang Won Tae , Lee Joeun , Yu Charley , Kamboj Sunita , Yankovich Tamara , Thiessen Kathleen M 
Published: May 2022

Abstract
State-of-the-art dose assessment models were applied to estimate doses to the population in urban areas contaminated by the Fukushima Daiichi Nuclear Power Plant accident. Assessment results were compared among five models, and comparisons of model predictions with actual measurements were also made. Assessments were performed using both probabilistic and deterministic approaches. Predicted dose distributions for indoor and outdoor workers from a probabilistic approach were in good agreement with the actual measurements. In addition, when the models were applied to assess the doses to the representative person, based on a concept recommended by the International Commission on Radiological Protection and in the International Atomic Energy Agency Safety Standards, it was evident that doses to the representative person obtained with a deterministic approach were always higher than those obtained with a probabilistic approach using the same model.
Atomic structures and mechanical properties in Zr–Ni–Al metallic glasses studied by molecular dynamics simulations
Authors: Zou Yang , Pan Shaopeng , Niu Xiaofeng , Qiao Junwei , Song Kaikai , Wang Weimin , Qin Jingyu 
Published: May 2022

Abstract
Based on molecular dynamics simulations, the atomic structures and mechanical properties of Zr75−x
Ni25Al
x
(x = 5–70) metallic glasses (MGs) were investigated by replacing Zr with Al. These MGs can be divided into the Zr-based (x = 5–45) and the Al-based systems (x = 50–70) according to the change of glass transition temperatures. Pair distribution function, bond pair, Voronoi analysis, and quasi-nearest atom were used to characterize the atomic structures in the MGs. It is found that the change rate relative to the Al concentration for the structural properties together with other properties in the Al-based systems is larger than those in the Zr-based systems. Moreover, the mixing enthalpy at 2000 K has a quadratic relationship with glass transition temperature and strength in both systems. Our results are helpful to understand the relationship among the properties of MGs.
Study of the Electrical Properties and Electrochemical Sensing Efficiency of Hydrothermally Synthesized Sr Doped Nickel Oxide Nanomaterials
Authors: Abbas Waseem , Mazhar Muhammad Ehsan , Ahmad Javed , Ahmad Sohail , Khan Hassan M. , Khan Imran , Zada Imran , Honey Shehla , Nisa Mehrun , Rao Komal Ali , Ahmad Mushtaq 
Published: May 2022

Abstract
Herein, we present pure nickel oxide nanoparticles (NiO NPs) and Sr doped NiO NPs SrxNi1−xO (x = 0.0, 0.01, 0.02, 0.03, 0.04) which are synthesized via hydrothermal approach. As-synthesized samples are analyzed through structural characterization techniques like x-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The single cubic phase is obtained for NiO NPs and the samples with low Sr dopant contents (1% to 2%); however, samples with high Sr dopant contents (3% to 4%) have a secondary phase (SrO phase). The particle size of Sr doped NiO NPs ranges from 50–100 nm, and the particles lose their uniformity as dopant concentration is increases. Electrical and dielectric characteristics of as-synthesized samples are studied, and the effect of Sr dopant contents is discussed. Electrochemical studies reveal that the selected samples exhibit remarkable catalytic activity toward glucose sensing owing to their specific structural and morphological characteristics.
Study of the structural and optical properties of thallium gallium disulfide (TlGaS2) thin films grown via thermal evaporation
Authors: Isik M , Karatay A , Ech-Chergui A N , Gasanly N M 
Published: May 2022

Abstract
Thallium gallium disulfide (TlGaS2) belonging to layered structured semiconducting family has been a significant compound due to its outstanding characteristics. Its layered characteristics take attention for two-dimensional (2D) material research area and thus TlGaS2 is known as promising layered compound to develop 2D materials for optoelectronic devices. To the best of our knowledge, the present work is the first one investigating TlGaS2 thin films grown by thermal evaporation method. The current study focused into the structural, morphological, and optical characteristics of thermally evaporated TlGaS2 thin films. X-ray diffraction pattern of the films exhibited one peak around 36.10° which was associated with (−422) plane of the monoclinic crystalline structure. The atomic compositional ratio of Tl:Ga:S was found to be suitable for the chemical formula of TlGaS2. Scanning electron microscopy images showed uniformly and narrowly deposited nanoparticles with sizes varying between 100 and 200 nm. Room temperature transmission measurements were recorded to obtain the bandgap energy of the evaporated thin films. Tauc analyses indicated direct band gap energy of 2.60 eV. Finally, Urbach energy was obtained as 95 meV. The results of the present paper would provide valuable insight to 2D material technology to understand the potential device applications of the TlGaS2.
Magnetotransport behavior of YBa2Cu3O7-δ
–Sm0.55Sr0.45MnO3 superconducting-ferromagnetic composite thin films
Authors: Kumari Suman , Anas Mohd , Raghav D S , Chauhan Shital , Siwach P K , Malik Vivek , Singh H K 
Published: May 2022

Abstract
We report a detailed study on the magnetotransport behavior of YBa2Cu3O7-δ
-Sm0.55Sr0.45MnO3 (YBCO-SSMO) superconducting-ferromagnetic composite thin films (thickness ∼80 nm) of nominal compositions (YBCO)1-x(SSMO)x (x = 0, 0.08, and 0.14). Films are grown by pulsed laser deposition of the pure and composite targets on (001)-SrTiO3 substrates, and all are single crystalline with the c-axis normal to the plane of the substrate. The Tc(R = 0) of the pure YBCO film is ≈87 K and decreases to ≈75 K and ≈44 K with the incorporation and increase of the ferromagnetic fraction in the superconducting matrix. Successive decrease in the slope of the normal state R-T curves maps the incorporation of the high resistance channels of the SSMO. In an external magnetic field (H), the rate of decrement in the Tc(R = 0) is found to be dTc(R = 0)/dH ∼1.8 K T−1, ∼4.7 K T−1, and ∼2.8 K T−1, respectively for x = 0, 0.08, and 0.14. The upper critical field and the irreversibility field are appreciably depressed in the composite samples and suggest a broadening of the mixed-phase vortex regime. The application of the thermally activated flux flow (TAFF) model shows that the activation energy decreases sharply from U0 = 4314 (910) meV, 498 (130) meV, and 253 (66) meV for YS00, YS08, and YS14, respectively, at H = 0 T (6 T). The analysis of the field-dependent activation energy in terms of

U

0

∼

H

−
α

and

U

0

≈
−
U

log

H

dependence suggests decoupling of the 2D vortices due to the ferromagnetic phase. The hysteresis in the current-voltage characteristics is seen to decrease with an increase in the SSMO content.
Testing the ΛCDM paradigm with growth rate data and machine learning
Authors: Arjona Rubén , Melchiorri Alessandro , Nesseris Savvas 
Published: May 2022

Abstract
The cosmological constant Λ and cold dark matter (CDM) model (ΛCDM) is one of the pillars of modern cosmology and is widely used as the de facto theoretical model by current and forthcoming surveys. As the nature of dark energy is very elusive, in order to avoid the problem of model bias, here we present a novel null test at the perturbation level that uses the growth of matter perturbation data in order to assess the concordance model. We analyze how accurate this null test can be reconstructed by using data from forthcoming surveys creating mock catalogs based on ΛCDM and three models that display a different evolution of the matter perturbations, namely a dark energy model with constant equation of state w (wCDM), the Hu & Sawicki and designer f(R) models, and we reconstruct them with a machine learning technique known as the Genetic Algorithms. We show that with future LSST-like mock data our consistency test will be able to rule out these viable cosmological models at more than 5σ, help to check for tensions in the data and alleviate the existing tension of the amplitude of matter fluctuations S
8 = σ
8 (Ωm,0/0.3)0.5.
On tuning a mean-field model for semi-supervised classification
Authors: Bergamim Emílio , Breve Fabricio 
Published: May 2022

Abstract
Semi-supervised learning (SSL) has become an interesting research area due to its capacity for learning in scenarios where both labeled and unlabeled data are available. In this work, we focus on the task of transduction—when the objective is to label all data presented to the learner—with a mean-field approximation to the Potts model. Aiming at this particular task we study how classification results depend on β and find that the optimal phase depends highly on the amount of labeled data available. In the same study, we also observe that more stable classifications regarding small fluctuations in β are related to configurations of high probability and propose a tuning approach based on such observation. This method relies on a novel parameter γ and we then evaluate two different values of the said quantity in comparison with classical methods in the field. This evaluation is conducted by changing the amount of labeled data available and the number of nearest neighbors in the similarity graph. Empirical results show that the tuning method is effective and allows NMF to outperform other approaches in datasets with fewer classes. In addition, one of the chosen values for γ also leads to results that are more resilient to changes in the number of neighbors, which might be of interest to practitioners in the field of SSL.
Effect of Silicon Fullerenes on Changes in the Heat Capacity of Nacl Electrolytes
Authors: Rajabova S S , Tilloeva T R , Safarov M M , Zaripova M A 
Published: May 2022

Abstract
The paper presents the results of an experimental study of the isobaric heat capacity of solutions of electrolytes of the water and NaCl system in the temperature range 288-373K. To measure the heat capacity of electrolytes, the method of monotonous heating was used (developed by Professor M.M.Safarov). The total relative error of measuring the heat capacity of this place with a confidence probability of 95% is on average equal to 3.8%. It is established that the specific isobaric heat capacity of electrolytes decreases with increasing temperature and concentration of sodium chlorine. The addition of fullerene leads to an increase in the heat capacity of solutions of the water and sodium chlorine system. On the basis of experimental data and the law of thermodynamic similarity, approximation dependences were obtained. Using the expressions obtained, it is possible to calculate the heat capacities of electrolytes at different temperatures and concentrations of fullerene nanoparticles.
Surface Tension of Colloid Systems of Castor Oil and Benzene at P=0.101 MPa
Authors: Rajabov A R , Hakimov D S , Safarov M M 
Published: May 2022

Abstract
The article describes the production and use of benzene and lubricants. The combination of these solutions represents a new chemical formula. Methods for measuring the surface tension coefficient of these liquids are given. The research results are presented in the form of tables and diagrams.
Non-Thermal Plasma Installation as a Pre-Treatment Method of Barley Seeds (Hordeum vulgare L.)
Authors: Petrukhina D , Gorbatov S , Tkhorik O , Medzhidov I , Tikhonov V , Shishko V , Ivanov I , Tikhonov A , Gluchshenko N , Kharlamov V 
Published: May 2022

Abstract
Microbial organisms are key pathogens for plants, animals, and humans. The elimination of pathogenic microbes is an essential topic for researchers. Non-thermal atmospheric plasma (NTAP) can potentially inactivate pathogenic microorganisms. This paper draws the results of the biocidal effect study in pre-treatment of barley seeds by NTAP. The effect was observed in 7-day-old seedlings. The results of reducing the total microbial number (by 36.7% after 5 minutes of exposure) were obtained. Thus, treatment with non-thermal plasma can reduce the microbiological contamination of agricultural plant seeds.
Experimental installation for study the low-power ICRF plasma at low pressures with equipment for experiment data synchronization
Authors: Terentev T N , Zheltukhin V S , Shemakhin A Yu , Nekrasov I K , Samsonova E S , Shemakhin E Yu , Tsokalo I E , Tyurin V A 
Published: May 2022

Abstract
An installation for numerical and experimental studies of low-pressure radio frequency plasma for surface modification of functional materials with equipment for data synchronization are presented. The equipment for data synchronization as well as intermediate results for plasma generation are showed.
One-dimensional continuum finite-difference model of the dynamics of a dusty medium in aerodynamic, electric and gravitational fields
Authors: Tukmakov D A 
Published: May 2022

Abstract
This paper presents a mathematical model of the dynamics of a gas suspension under the action of an aerodynamic field, an electric field, and a gravitational field. The continuum model is used to describe the dynamics of the disperse component. The intercomponent momentum exchange included the aerodynamic drag force, the dynamic Archimedes force, and the added mass force. The Coulomb force acting on dispersed particles was taken into account. The model assumes the solution of the equations of conservation of “average density”, momentum and energy for the dispersed phase. The electric field was described by the Poisson equation. The equations of the mathematical model were supplemented with boundary conditions. The equations of mechanics were integrated by explicit finite-difference method of McCormack.
Investigation of Electric Discharge With Liquid Electrodes Under Influence on Carbon Fiber
Authors: Khazeev K I , Kayumov R R , Nizameev A A , Akhatov M F 
Published: May 2022

Abstract
In this work, experimental reseaches of the effect of a DC electric discharge with jet electrolytic cathode and liquid anode at atmospheric pressure on carbon fiber are carried out. Experimental studies were carried out in the voltage range U= 100-1300 V and discharge current 1=0.02-1.8 A. A 20% NaCl solution in process water was used as liquid electrodes. The length of the jet varied lc = 10÷50 mm, the diameter of the jet dc = 1÷3 mm. The optimal form of discharge and modes for processing carbon fiber have been established. The optimal mode of electric discharge which is between a jet electrolytic cathode and a liquid anode at atmospheric pressure is revealed. After processing for 30 s, the tensile strength of the modified samples changed by 7% compared to the untreated sample.
Influence of ion-plasma treatment on the surface morphology of epitaxial lead-tin telluride films
Authors: Belov Y D , Zimin S P , Amirov I I , Naumov V V 
Published: May 2022

Abstract
The paper discusses the physical aspects of surface modification of Pb1-xSnxTe (x = 0.00-0.80) epitaxial films during ion-plasma treatment in argon plasma. Lead–tin telluride films 1−2 μm thick were grown on (111) BaF2 substrates by molecular beam epitaxy. The ion-plasma treatment of the samples was carried out in a high-density low-pressure radio frequency (RF) inductively coupled plasma at an ion energy of 75 eV. The duration of the process is 240 s. The evolution of the surface morphology of the films and the formation of micro- and nanostructures at different ratios of lead and tin are studied.
Classical and quantum warm dense electron gas dynamic characteristics: analytic predictions
Authors: Ara J. , Filinov A.V. , Tkachenko I.M. 
Published: May 2022

Abstract
We apply a novel 9-moment variational version of the self-consistent non-perturbative method of moments to study how the temperature affects the dynamic response of the electron gas in thermodynamic equilibrium. The theoretical results are obtained with the only input being the static structure factor. Comparison is carried out with the data obtained in the random-phase and the effective static local-field (ESA) (1) approximations. A quite satisfactory agreement is achieved with the system dynamic structure factor evaluated within the ESA interpolation scheme. We analyze the system properties for the temperature values (1 ≤ T/TF
≤ 4) chosen in the range where the electron gas starts to undergo a transition from the degenerate to classical behaviour. The extension of the method to a broader range of temperatures and densities is straightforward and is left for future studies. Nevertheless, we demonstrate a systematic way to investigate the gradual transition from degenerate to classical systems.
Spatial Structure of Gas Dynamic Characteristics In A Glow Discharge With A Supersonic Axisymmetric Gas Flow
Authors: Timerkaev B A , Petrova O A , Shamsutdinov R S , Sayfutdinov A I 
Published: May 2022

Abstract
The paper presents the results of theoretical calculations of the gas-dynamic parameters of a supersonic flow in an axisymmetric Laval nozzle for the case when the central body removed from the nozzle serves as one of the glow discharge electrodes. It is shown that the presence of a supersonic flow makes it possible to establish a stationary inhomogeneous density of gas particles between the cathode and the anode of a glow discharge. The density of gas particles near the cathode and anode may differ by tens of times. The results of the study of the glow pattern of a discharge with a supersonic gas flow are presented. The dependence of the characteristics of the glow discharge on the distribution of inhomogeneous gas density in the interelectrode region is revealed. This effect opens up new possibilities for the use of discharges with supersonic gas flow for nanocoating and synthesis of nanostructures.