bluuebunny/crossref_metadata_2025_split huggingface dataset:
Role and place of Informatics in the training of future teachers of mathematics
Authors: Ponomareva N S 
Published: March 2021

Abstract
The announcement of the 2020/2021 academic year as the Year of Mathematical Education in Ukraine and the adoption of the Concept for the Development of Natural and Mathematical Education (STEM-education) until 2027 were a response to the systemic crisis of mathematical training in general secondary education and training of mathematics teachers in Ukraine. The World focus on the integration of natural and mathematics, informatical and engineering education requires rethinking of the role and place of Informatics as a science, as a study discipline and as a basis of computer engineering in training future mathematics teachers. Nowadays, the teacher of mathematics should be capable for effective professional activity in a rapidly changing technology, educational paradigms and catastrophic educational disruptions, such as the current COVID-19 pandemic.
Methodic quest: Reinventing the system
Authors: Semerikov S O , Teplytskyi I O , Soloviev V N , Hamaniuk V A , Ponomareva N S , Kolgatin O H , Kolgatina L S , Byelyavtseva T V , Amelina S M , Tarasenko R O 
Published: March 2021

Abstract
This article is an attempt to rethink the concepts of “methodic” and “methodologic / methodical system” as basic to educational technology. What should be the structure of a methodical system? What is primary – the methodical system or the methodology? How are methodical systems created and developed? How do educational technology and a methodical system relate? How does changing the components of a system make it emergent? These and other issues are explored through the development of a new class of teaching methods – computer-based training systems.
Formation of the scientist image in modern conditions of digital society transformation
Authors: Iatsyshyn Anna V , Popov O O , Kovach V O , Iatsyshyn Andrii V , Artemchuk V O , Radchenko O O , Deinega I I , Kovalenko V V 
Published: March 2021

AbstractThe publication considers factors that are influencing formation of scientists image especially: availability to inform scientist or scientific organization about the registration, scientometric indices, use of global identifiers to improve accuracy in calculating indicators, publication of papers in journals with high impact factor, publications in resources that provide visibility in global information space, involvement in global communications system, level of competence. Specialists in various fields of science developed a number of practical recommendations for various techniques and tools that can be used and are helpful to create and to make, both personal image and image of the organization, institution, firm, etc. Also, main directions of using digital technologies to create the image of scientists are identified and substantiated. Scientists formulated recommendations to make their own image using digital systems based on analysis of scientific literature and personal experience: author’s digital identifier ORCID, profiles in international scientometric systems, saved publications in electronic libraries, profiles in social and scientific electronic networks, etc.
Developing and using open electronic educational resources in educational activities
Authors: Velychko V Ye , Omelchenko S O , Khyzhniak I A , Fedorenko E G 
Published: March 2021

AbstractThe article looks into the effective use of open electronic educational resources. The concept of open electronic educational resources is exposed, their structure and key elements are presented, issues of implementation in educational practice are considered. Requirements for open electronic educational resources are defined, tools for designing and platforms for their support and dissemination are identified. The analysis of the existing open electronic educational resources and the experience of their use is conducted. The principles of open electronic resources design based on crowdsourcing are revealed. The stages of creating e-learning resources that meet open Creative Commons licenses on the examples of pre-service teachers’ training are explored. The essence of Creative Commons licenses is reflected. The theoretical and methodological principles of the use of open electronic educational resources in the educational activity of pre-service teachers are considered. There is a direct link between open educational resources and university education.
Linear four-element cylindrical helix antenna array in boreside and scanning radiation modes
Authors: Andreev Yu A , Koshelev V I 
Published: March 2021

Abstract
A cylindrical equidistant helix antenna has been created. The helix geometry of the antenna determined its central frequency of the operating band, equal to 1 GHz. This frequency corresponds to the maximum spectra of a bipolar voltage pulse with duration of 1 ns. Helixes identical to those of a single antenna were used in horizontal four-element linear arrays. Antenna arrays with different periods of d were studied in the axial mode with simultaneous excitation of elements by a bipolar voltage pulse of 1 ns duration and in the mode of scanning at a fixed angle in the horizontal plane. Experimental measurements were carried out in the frequency and time domains.
Improving conveyor weigher verification accuracy with reference weights without technological process shutdown
Authors: Galin I A , Dvuzhilova S N , Bokizhanov G I-M , Balandin V S 
Published: March 2021

Abstract
There are proposed the kinematic schemes of two-channel conveyor belt weighers which allow minimizing the errors of the verification using the reference weight without stoppage of the production process. There are presented two options of calculation of the reference weight mass simulating the bulk material taking into account the systematic and additional error of the conveyor belt weighers.
Statistical study of accuracy of the video-positioning system for GPR
Authors: Khmelev V L , Fomynikh A F 
Published: March 2021

Abstract
Here we present results of the statistical study of the accuracy of the local optical positioning system for the industrial GPR OKO-2. The results of measurement are forming a statistical set. The statistical set should verify the accuracy LPS. The proposed LPS uses special tapes with a special periodic pattern as a reference object. The video camera records the image of the marker tapes, was located on a fast mechanical scanner. The scanner produced an accurate movement of the camera perpendicular to the tape. During the moving process, LPS measures the distance between the camera and tape and compared it with the scanner data.
Analysis of transients in high voltage multipliers
Authors: Rajan R.N. , Mitra A. , Sharma D.K. , Dewangan S. , Patel R. , Das S.H. , Mondal J. , Bakhtsingh R.I. , Sharma A. 
Published: March 2021

Abstract
Different forms of Cockcroft-Walton multipliers are widely
used to generate very high voltages in the range of millions of
Volts. In many applications, high voltage multipliers are insulated
by pressurized gas, to realize compact systems. These systems are
often stressed to high operating electric fields and suffer frequent
discharges especially during high voltage conditioning phase. During
high voltage discharges, transient voltages appear in the system
creating higher stresses than normal operation in
components. Parasitic capacitance between the high voltage system
and ground can significantly affect transients in the system. In
this paper, a model for analyzing transients in series coupled high
voltage multiplier is presented. Typical transient voltage levels in
stage inductors and capacitors are discussed. Experimental results
with 1 MV, 100 mA symmetrical Cockcroft-Walton multiplier is
presented to corroborate predictions from theoretical model.
Comparing Psychometric Properties of the NIH Toolbox Cognition Battery to Gold-Standard Measures in Socioeconomically Diverse Older Adults
Authors: MacAulay R K , Boeve A , Halpin A 
Published: March 2021

Abstract

Objective
The National Institutes of Health Toolbox-Cognition Battery (NIHTB-CB) is an efficient computerized neuropsychological battery. This study investigated its psychometric properties in terms of sociodemographic characteristics and technology use in adults aged 57–87 (with an average age of 70).

Methods
Community-based participatory research procedures were used to enhance enrollment of adults with lower education and income backgrounds. Study procedures replicated work that compared the NIHTB-CB Crystallized and Fluid composites to analogous gold-standard (GS) measures and extended it by investigation of socioeconomic status and technology use-related differences in performance.

Results
The high correlations among the NIHTB-CB and GS analogous Crystallized and Fluid composites suggested good convergent validity. There was no evidence of significant education- or economic-related group differences in these associations. However, caution is needed as Cronbach’s alpha that indicated the NIHTB-CB Fluid composite had questionable internal item consistency. The NIHTB-CB and GS measures demonstrated poor discriminant validity in the high school but not college-educated groups. Regression analyses found that comfort with technology use, income, education, and age predicted better cognitive test performance on the computerized and paper-pencil measures.

Conclusions
There is an urgent need to improve the understanding of socioeconomic disparities influence on test scores and brain health. Lack of discriminant validity in the cognitive tests indicates that these measures could result in diagnostic errors within noncollege-educated older adults. These findings reduce confidence in the use of the NIHTB-CB Fluid composite in older adults and support that there is a significant socioeconomic-related digital divide in comfort with technology use.
Can Supranational Law Enhance Democracy? EU Economic Law as a Market-Democratizing Project
Authors: Tagiuri Giacomo 
Published: March 2021

Abstract
This article focuses on the economic regulatory component of the current backlash against liberal democracy and supranationalism in the European Union (EU). I identify a style of economic regulation that seeks to govern markets in the interest of insiders who are framed as vulnerable to the challenges of economic globalization – what I call rearguard economic regulation. While such regulation may be useful to reinforce national cultural attachments and a sense of belonging, it also has an anti-pluralist character that threatens markets’ emancipatory orientation. By identifying this challenge, the article seeks to defend a vision of markets as contributing to the promise of democracy, by fostering a plurality of options in each sphere of life. In the European context, I argue, EU economic law may be understood as advancing the realization of such a vision of markets. Viewed in this light, supranational and, specifically, EU economic law appear not so much as ordo- (or neo)-liberal straightjackets on national democracy but, instead, as providing mechanisms for democratization of the economy and society. Such democratizing potential is attributable to (i) the pluralist outlook of the law of EU integration, which forces member states to confront the plurality of forms of economic and social life existing within the polity and being further diversified by globalization as well as (ii) the deliberative and open-ended character of EU law adjudication, which may allow for progressive re-articulations of national market regulation.
MicroRNA-139-5p inhibits inflammatory and oxidative stress responses ofSalmonella-infected macrophages through modulating TRAF6
Authors: Xu Xiaohong , Ye Tingyun , Wang Yizhang , Pan Lianlian , Ye Yali , Ding Zhengxiang , Bao Danni 
Published: March 2021

ABSTRACTEvidence indicates that macrophages play an important role in the immune system. Therefore, research involving inflammatory and oxidative stress responses in macrophages is of great significance. Many factors contribute to inflammation and oxidative stress, including Salmonella. We investigated the effect of the miR-139-5p/TRAF6 axis on the inflammatory and oxidative stress responses of Salmonella -infected macrophages. Our findings revealed that miR-139-5p decreased IL-1β and TNF-α levels to inhibit Salmonella-induced inflammatory responses in the RAW264.7 macrophage cell line. Furthermore, miR-139-5p inhibited Salmonella-induced oxidative stress by strengthening SOD, CAT and GSH-PX activity, as well as lowering the malondialdehyde level in the RAW264.7 macrophages cell line. Subsequently, it was verified that TRAF6 was a downstream target of miR-139-5p in RAW264.7 cells. Rescue assays indicated that the over-expression of miR-139-5p inhibits the effects of TRAF6 on inflammatory and oxidative stress responses including Salmonella infection in RAW264.7 cells. To our knowledge, this study is the first to verify that miR-139-5p inhibits inflammatory and oxidative stress responses of Salmonella-infected macrophages through regulating TRAF6. This discovery may offer new insights on inflammatory and oxidative stress responses in macrophages.
Resale or agency: pricing strategy for advance selling in a supply chain considering consumers’ loss aversion
Authors: Zhang Yawen , Li Bo , Zhao Ruidong 
Published: March 2021

Abstract
Advance selling activities are becoming more popular, especially in online retailing of new products. During the advance selling process, consumers may be loss averse. This influences the pricing strategy of the members of the supply chain. Using prospect theory and game theory, and considering consumers’ loss aversion, this paper studies the pricing strategy of advance selling in a supply chain consisting of a manufacturer and an e-retailer under a resale contract or an agency contract. The study finds that as consumers’ loss aversion increases, supply chain members set lower prices. Consumers’ loss aversion has a positive impact on the member who directly prices to consumers, but it has a negative impact on the indirect member. Advance selling under an agency contract makes it easier to achieve a Pareto improvement than that under the resale contract. When the unit order fulfilment cost is low, the e-retailer prefers the agency contract.
Genetic parameter estimations and genomic insights for teat and udder structure in young and mature Canadian Angus cows
Authors: Devani Kajal , Crowley John J , Plastow Graham , Orsel Karin , Valente Tiago S 
Published: March 2021

Abstract
Poor teat and udder structure, frequently associated with older cows, impact cow production and health as well as calf morbidity and mortality. However, producer culling, for reasons including age, production, feed availability, and beef markets, creates a bias in teat (TS) and udder scores (US) assessed and submitted to the Canadian Angus Association for genetic evaluations toward improved mammary structure. In addition, due to the infancy of the reporting program, repeated scores are rare. Prior to the adoption of genetic evaluations for TS and US in Canadian Angus cattle, it is imperative to verify that TS and US from young cows are the same traits as TS and US estimated on mature cows. Genetic parameters for TS and US from all cows (n = 4,192) and then from young cows (parities 1 and 2) and from mature cows (parity ≥ 4) were estimated using a single-trait animal model. Genetic correlations for the traits between the two cow age groups were estimated using a two-trait animal model. Estimates of heritability (posterior SD [PSD]) were 0.32 (0.07) and 0.45 (0.07) for young TS and US and 0.27 (0.07) and 0.31 (0.07) for mature TS and US, respectively. Genetic correlation (PSD) between the young and mature traits was 0.87 (0.13) for TS and 0.40 (0.17) for US. Genome-wide association studies were used to further explore the genetic and biological commonalities and differences between the two groups. Although there were no genes in common for the two USs, 12 genes overlapped for TS in the two cow age groups. Interestingly, there were also 23 genes in common between TS and US in mature cows. Based on these findings, it is recommended that producers collect TS and US on their cow herd annually.
Innovative Cancer Survivorship Services for Rural and Underserved Communities
Authors: Argenbright Keith , Berry Emily 
Published: March 2021

Abstract
In 2006, the Institute of Medicine recognized that cancer survivors faced complex physical and emotional health problems, often overlooked or inadequately managed. In Texas, access to programs specifically designed to address unique needs of cancer survivors is almost nonexistent for low-income uninsured or underinsured patients. In response to the unmet care needs of underserved cancer centers, Moncrief Cancer Institute, an affiliate of the National Cancer Institute–designated UT Southwestern Harold C. Simmons Comprehensive Cancer Center, established a community-based program using a survivorship care model similar to those offered in academic medical centers. Understanding that a one-size-fits-all approach could not successfully meet the needs across the service area, the cancer survivorship service line was mobilized to provide flexibility in delivery without sacrificing quality of care. The program continues to evolve, extending the foremost scientific information and resources into the communities it serves.
Searching for chemical abundance variations in young star clusters in the Magellanic Clouds: NGC 411, NGC 1718, and NGC 2213
Authors: Kapse Shalmalee , de Grijs Richard , Zucker Daniel B 
Published: March 2021

ABSTRACT
The conventional picture of coeval, chemically homogeneous, populous star clusters – known as ‘simple’ stellar populations (SSPs) – is a view of the past. Photometric and spectroscopic studies reveal that almost all ancient globular clusters in the Milky Way and our neighbouring galaxies exhibit star-to-star light-element abundance variations, typically known as ‘multiple populations’ (MPs). Here, we analyse photometric Hubble Space Telescope observations of three young (&lt;2-Gyr old) Large and Small Magellanic Cloud clusters, NGC 411, NGC 1718, and NGC 2213. We measure the widths of their red giant branches (RGBs). For NGC 411, we also use a pseudo-colour–magnitude diagram (pseudo-CMD) to assess its RGB for evidence of MPs. We compare the morphologies of the clusters’ RGBs with artificially generated SSPs. We conclude that their RGBs do not show evidence of significant broadening beyond intrinsic photometric scatter, suggesting an absence of significant chemical abundance variations in our sample clusters. Specifically, for NGC 411, NGC 1718, and NGC 2213 we derive maximum helium-abundance variations of δY = 0.003 ± 0.001(Y = 0.300), 0.002 ± 0.001(Y = 0.350), and 0.004 ± 0.002(Y = 0.300), respectively. We determined an upper limit to the NGC 411 nitrogen-abundance variation of Δ[N/Fe] = 0.3 dex; the available data for our other clusters do not allow us to determine useful upper limits. It thus appears that the transition from SSPs to MPs occurs at an age of ∼2 Gyr, implying that age might play an important role in this transition. This raises the question as to whether this is indeed a fundamental minimum age limit for the formation of MPs.
An improved model for the spectra of discs of nova-like variables
Authors: Hubeny Ivan , Long Knox S 
Published: March 2021

ABSTRACT
The spectra arising from the discs of nova-like variables show many of the features seen in stellar atmospheres. They are typically modelled either from an appropriated weighted set of stellar atmospheres or a disc atmosphere with energy is dissipated near the disc plane, with the effective temperature distribution expected from a steady-state accretion disc. However, these models generally overpredict the depth of the Balmer jump and the slope of the spectrum in the ultraviolet. The problem is likely due to energy dissipation in the disc atmosphere, which produces a flatter vertical temperature profile than is observed in stars. Here, we provide validation for this hypothesis in the form of spectra generated using the stellar atmosphere code tlusty using a parametric prescription for energy dissipation as a function of depth and closely match the spectrum of the nova-like IX Vel over the wavelength range 1150–6000 Å.
Evaluating galaxy dynamical masses from kinematics and jeans equilibrium in simulations
Authors: Kretschmer Michael , Dekel Avishai , Freundlich Jonathan , Lapiner Sharon , Ceverino Daniel , Primack Joel 
Published: March 2021

ABSTRACT
We provide prescriptions to evaluate the dynamical mass (Mdyn) of galaxies from kinematic measurements of stars or gas using analytic considerations and the VELA suite of cosmological zoom-in simulations at z = 1–5. We find that Jeans or hydrostatic equilibrium is approximately valid for galaxies of stellar masses above M⋆ ∼ 109.5 M⊙ out to 5 effective radii (Re). When both measurements of the rotation velocity vϕ and of the radial velocity dispersion σr are available, the dynamical mass $M_{\rm dyn} \!\simeq \! G^{-1} V_{\rm c}^2 r$, can be evaluated from the Jeans equation $V_{\rm c}^2= v_\phi ^2 + \alpha \sigma _{\rm r}^2$ assuming cylindrical symmetry and a constant, isotropic σr. For spheroids, α is inversely proportional to the Sérsic index n and α ≃ 2.5 within Re, stars for the simulated galaxies. The prediction for a self-gravitating exponential disc, α = 3.36(r/Re), is invalid in the simulations, where the dominant spheroid causes a weaker gradient from α ≃ 1 at Re, gas to 4 at 5Re, gas. The correction in α for the stars due to the gradient in σr(r) is roughly balanced by the effect of the aspherical potential, while the effect of anisotropy is negligible. When only the effective projected velocity dispersion σl is available, the dynamical mass can be evaluated as $M_{\rm dyn} = K G^{-1} R_{\rm e} \sigma _{\rm l}^2$, where the virial factor K is derived from α, given the inclination and vϕ/σr. We find that the standard value K = 5 is approximately valid only when averaged over inclinations and for compact and thick discs, as it ranges from 4.5 to above 10 between edge-on and face-on projections.
Mending the Net: Public Strategies for the Remediation of Network Failures
Authors: Samford Steven , Breznitz Dan 
Published: March 2021

AbstractMarket and hierarchical/organizational failures have long been the target of public policies explicitly aimed to mitigate their negative effects. However, in spite of a growing interest in policies around industrial clusters and business networks, scholarship on public efforts at remediating network failures has been ad hoc and lacking a binding theory. A central question is what strategies public agencies employ to repair network failures. We begin to answer this question by distinguishing between two distinct approaches: (1) “network construction” in which government agents actively build, re-shape, or thicken the structures of private sector networks; and (2) “network activation” in which government agents seek to alter the internal dynamics of existing private sector networks. To provide empirical support for these concepts, we provide a series of short international examples to illustrate the scope of network remediation activities as well as two in-depth cases that demonstrate how these mechanisms can work: the Canadian Industrial Research Assistance Program (IRAP) and the specialized Mexican Lead Substitution Program.