bluuebunny/crossref_metadata_2025 huggingface dataset:
Giovanni Roberto Ruffini: Social Networks in Byzantine Egypt.
Authors: Jördens Andrea
Published: April 2021

Giovanni Roberto Ruffini: Social Networks in Byzantine Egypt. Cambridge: Cambridge UP 2008. X, 278 S. 11 Abb. 55 £.
Joseph Geiger: The First Hall of Fame. A Study of the Statues in the Forum Augustum.
Authors: Goldbeck Vibeke
Published: April 2021

Joseph Geiger: The First Hall of Fame. A Study of the Statues in the Forum Augustum. Leiden/Boston: Brill 2008. XI, 225 S. 7 Abb. (Mnemosyne Suppl. 295.) 99 €.
James F. D. Frakes: Framing Public Life. The Portico in Roman Gaul.
Authors: Schalles Hans-Joachim
Published: April 2021

James F. D. Frakes: Framing Public Life. The Portico in Roman Gaul. Wien: Phoibos 2009. XI, 487 S. 12 Textabb. 165 Pläne. 4°.
Neorealismus im italienischen Film
Authors: Falke Gustav
Published: April 2021

Wohl jeder, der zum ersten Mal die Fahrraddiebe von Vittorio De Sica sieht, wird den Kopf schütteln, wie dieses Melodram zu seinem Ruhm kommen konnte. Der Protagonist ist ein armer Vorstadtrömer, der endlich eine Arbeit als Filmplakatkleber findet. Für seine neue Arbeit muss er ein Fahrrad stellen, das ihm jedoch gestohlen wird. Auf der Suche nach dem gestohlenen Rad irrt er zusammen mit seinem kleinen Sohn umher. Tatsächlich kommt er dem Dieb auf die Spur. Doch kann er ihm nichts nachweisen. Schließlich unternimmt er selbst – deshalb der Plural im Filmtitel – unter den beschämenden Blicken des Kindes einen erfolglosen Diebstahlsversuch.
INVESTIGAÇÃO DAS CAUSAS DE EVASÃO NA GRADUAÇÃO A DISTÂNCIA E POSSÍVEIS SOLUÇÕES PARA MELHORAR A EFICÁCIA DAS UNIVERSIDADES NO BRASIL POR MEIO DE METODOLOGIA DE APRENDIZAGEM BASEADA EM PROJETOS COM MEDIAÇÃO DE TIC
Authors: Silva Wildenilson Sinhorini Vieira da
Published: April 2021

A proposta do trabalho deste ensaio é refletir sobre as causas do abandono dos cursos on-line e identificar possíveis soluções para melhorar a eficácia das universidades no Brasil. Observou-se a contribuição do modelo educacional de e-learning baseado em metodologias ativas mediadas pelas TICs, como é o caso da Aprendizagem Baseada em Projetos (ABP), e possíveis impactos para melhorar a motivação dos alunos e reduzir o índice de evasão. Para o desenvolvimento desta pesquisa, optou-se por uma pesquisa teórica para identificar as pesquisas já realizadas sobre o tema do abandono, com ênfase na América Latina e no Brasil, aprofundando as inter-relações com as questões observadas neste estudo e possíveis estratégias de aprendizagem que aumentem a eficácia da aprendizagem, a motivação dos alunos e a redução do abandono. Por fim, o ensaio foi bastante enriquecedor, pois foi possível identificar soluções para melhorar a eficácia das universidades na oferta de serviços educacionais
ASSESSORAMENTO ESTUDANTIL NA EAD POR MEIO DA ABP E GAMIFICAÇÃO: QUESTIONANDO A AUSÊNCIA DE ORIENTAÇÃO EDUCACIONAL ATIVA NO ENSINO SUPERIOR
Authors: Soares Lilian
Published: April 2021

Os primeiros meses dentro de uma instituição de ensino superior podem ser uma experiência engrandecedora, mas também assustadora. Em meio à pandemia de Covid-19, a metodologia presencial foi substituída pela Educação a Distância de um dia para o outro, e muitos estudantes de nível superior, considerados foco deste artigo, viram-se completamente independentes no gerenciamento de seus estudos, o oposto do que os sistemas educacionais pregaram por séculos. Através de uma pesquisa bibliográfica exploratória, o presente artigo objetiva destacar a relevância das metodologias ativas em consonância com o trabalho do orientador educacional na atuação direta de suporte e acolhimento acadêmico, já que ambos fomentam o desenvolvimento de competências dos estudantes, assim como a autonomia educacional, por meio do engajamento no processo de ensino-aprendizagem, motivando-os, especialmente nesse período de “novo normal”.
A Study on The Counselors’ Levels of Professional Pride And Job Satisfaction According to Certain Variables
Authors: YILDIRIM Hacer , YÜKSEL ŞAHİN Fulya
Published: April 2021

The study examines whether counselors’ levels of professional pride and job satisfaction significantly differ according to gender, education level, receiving supervision for individual counseling, receiving supervision for group counseling, seeing university education as adequate, the job title used, and seniority. The study group consisted of 661 counselors. Of the participants, 71.6% are female (n=473) and 28.4% (n=188) are male; and as for their age ranges, 71.3% (n=471) are between 21-30 years, 20.0% (n=132) are between 31-40 years, 7.6% (n=50) are between 41-50 years, and 1.2% (n=8) are between 51-60 years of age. The “Professional Pride Scale”, the “Job Satisfaction Scale”, and a “Personal Information Form” were used to collect the study data. Data analysis was based on MANOVA, Games-Howell Test, Scheffe Test, and Discriminant Analysis. The results demonstrate that the counselors’ mean scores in professional pride and job satisfaction do not significantly differ according to gender and receiving supervision for individual and group counseling. On the other hand, significant differences were found between the counselors’ mean scores in professional pride and job satisfaction according to education level, seeing university education as adequate, and the job title used. As for seniority, the counselors’ mean score in professional pride significantly differed, while their mean scores in job satisfaction did not significantly differ according to seniority. The study results are discussed in light of the literature and certain suggestions are made accordingly.
Exploring How ELT Teachers Perceive and Practice English Language Assessment
Authors: Isik Ali
Published: April 2021

As a well-designed language education program naturally requires a well-designed assessment component, the pivotal role of assessment in language education needs to be stressed. This study focuses on how English language teaching (ELT) teachers receive training in English language assessment, and how they perceive and practice assessment in Turkey. The study was conducted with the participation of 198 ELT teachers from 24 K-12 level schools and eight universities. A mixed-methods research design was chosen and the data were collected through a questionnaire, follow-up interviews, observations, personal conversations, and sample exam evaluations. The findings indicated that the assessment practices of the teachers were shaped by the teachers’ language learning and teaching experiences, their intuition, adherence to assessment traditions, and the emulation of what other teachers conducted to conform to group norms. It was also observed that as the teachers did not receive proper pre-service and in-service assessment training, their assessment knowledge was low. Moreover, it was found that the assessment component of teacher training programs remained peripheral and did not help equip teachers with assessment-related theoretical knowledge and practical skills. Finally, the assessment quality in these schools was found to be low and assessment was taken as a formal requirement to grade students. In the final part of the paper, some suggestions for effective assessment are put forward.
The Collaborative Discussion Model: Developing Writing Skills through Prewriting Discussion
Authors: Pospelova Tatiana
Published: April 2021

This study aims to investigate the effect of peer-assisted prewriting discussion on second language (L2) academic writing and its benefits for students with different proficiency levels. While there is a significant body of research exploring the positive impact of collaboration on L2 writers' written performance and the ways it could be organised, there is little practical consideration on how to formulate explicit instruction. The rationale for this research lies in designing and arranging explicit instruction that could lead to L2 learners producing a higher quality writing output. Based on both qualitative and quantitative methods, and drawn on students’ written texts and data analysis, the current study was conducted to devise and test a proposed model, which the author will term the ‘collaborative discussion model’ (the CDM). The control and experimental groups of Russian EFL students (n = 48) were engaged in written assignments after naturally occurring discussions and then the latter group was involved in an instructor-led discussion. The practice writing tasks were rated with the analytic rubric used in IELTS, assessing task response, coherence and cohesion, lexical resource, and grammatical range. The findings suggest that collaborative prewriting tasks, accomplished in the experimental group of students with different levels of L2 proficiency, may encourage students to engage more in reflection about the content and language of the text. As the texts produced after introducing the CDM were scored higher, especially on the criteria of task response and lexical resource, it is suggested that scaffolding prewriting discussions can potentially augment the writing skills of learners and the CDM can be used as a complementary activity to address the challenges associated with academic writing. The results of the questionnaire can imply that there are benefits of explicit instruction for students with different levels of L2 proficiency, although in nuanced ways and different degrees.
The Integration of Verbal Humor into EFL Classrooms: The Issues of Appropriateness and Relevance in Focus
Authors: Alemi Minoo , Ghanbar Hessameddin , Rezanejad Atefeh
Published: April 2021

The present study examined the manifestations of Iranian male and female EFL teachers’ use of humor in the classroom environment. To this end, a qualitative study with 30 participants was implemented in two English language institutes in Iran. Equally, 15 male and female EFL teachers were selected by convenience sampling and their classes were audio-recorded and later transcribed for the examination of the types of humor they used and their frequency. Wanzer, Frymier, Wojtaszcyk, and Smith’s (2006) method of humor analysis and categorization of appropriateness was exploited for the analysis of the types of humor collected from the participants of the study. The results suggested that the use of humor by male teachers was more frequent than that of female teachers. It was revealed that 57% of the humor production was by male EFL teachers and 43% was produced by female EFL teachers. The results revealed that the most frequent humor type in male teachers’ classrooms was “funny comments” (27%), with “teasing students” (3%) being the least frequent one. In the case of appropriate humor use, similarly, female teachers used “funny comments” (52%) as the most frequent one, while there was no instance of “providing humorous examples”. Considering inappropriate humor use, both male and female teachers used “funny comments” (45%) as the most frequent type. The findings of the present study can be of use to EFL teachers and suggests the need for workshops and training courses on the integration of humor into EFL classes.
RhoC IP for MS v1
Authors: Lloyd-Jones Cam , Drown Bryon , Kelleher Neil
Published: April 2021

RhoC IP protocol for MS analysis
Preschool education specialists training program.
Authors:   L.N. Gumilyov Eurasian national university Kazakhstan, Nur-Sultan, Mambetalina Aliya Saktaganovna , Karmelyuk Anastassiya Vyacheslavovna ,   L.N. Gumilyov Eurasian national university Kazakhstan, Nur-Sultan, Saliyeva Aigul Zhanaevna ,   L.N. Gumilyov Eurasian national university Kazakhstan, Nur-Sultan, Tokatligil Yuliya Sergeevna ,   L.N. Gumilyov Eurasian national university Kazakhstan, Nur-Sultan, Fatima Niyazbekovna Zhumabekova ,   L.N. Gumilyov Eurasian national university Kazakhstan, Nur-Sultan
Published: April 2021

the article presents a program for training preschool education specialists in multilingual groups to work with children in kindergarten in three languages and a program of psychodiagnostic work to identify the features and level of actual development of mental cognitive processes in children, reflecting the particularities of mastering trilingualism, in order to determine the ways developmental work. The article presents the methods of psychodiagnostics of cognitive processes: attention, memory, thinking, imagination and speech. The training program for preschool education specialists in multilingual groups is a comprehensive course that includes classes in Russian, Kazakh and English and includes a plan for the educational work of a teacher-educator in Russian. The plan includes the topics and goals of each day for a full calendar year of educational work in a preschool institution. The proposed system of work on teaching the language of preschoolers can be effectively used in the practical activities of kindergartens, regardless of the profile of their activities and focus.
Experience of using public relations in promoting Russian education in Mongolia.
Authors:   Representative office of Rossotrudnichestvo in Mongolia, Ulaanbaatar, Mongolia, Budaeva Tatyana
Published: April 2021

The article is devoted to consideration of the experience of using public relations and state-public mechanisms for promoting Russian education and the Russian language in Mongolia. These mechanisms provide for the intensification of activities with state and non-state structures of Mongolia with the goal of expansion of scientific, educational, cultural, economic, informational and other humanitarian ties. The author analyzes in detail the effectiveness of mechanisms of informational support for the activities of representative offices and marketing in social networks, which is a communication strategy in the Mongolian media space. Improving institutional mechanisms provides for the steady expansion of the public’s participation in the development, adoption, and implementation of managerial decisions in promoting Russian education, including as part of a selection campaign for the distribution of intergovernmental quotas in Mongolia. An important aspect of the study was to identify the role of the authorities of a friendly country and partner organizations of the Russian Centre of Science and Culture in Ulaanbaatar. The results of the research are presented in the form of conclusions con-taining further development prospects.
Teaching the Russian ethics of students of secondary schools in Mongolia with different levels of general educational competence.
Authors:   secondary general education school # 75 in Ulan Bator, Mongolia, Daurenbek Nurtugan
Published: April 2021

The article examines the features of the process of teaching the Russian language in the Mongolian secondary school. The entire educational process is built on the basis of speech topics. At the same time, the importance of taking into account Russian speech etiquette, culture and history of Russia is noted. The author of the article emphasizes that teaching the Russian language includes such important goals as general education, which significantly increases the general culture of schoolchildren.
LAW AND ECONOMY IN THE CONTEXT OF THE NEW PANDEMIC EMERGENCY: THE ECHR LEADING CASE MARCELLO VIOLA V. ITALY AND THE EU LAW
Authors: Antinucci M.
Published: April 2021

The analysis of the most recent Eurostat data shows that in March 2020 industrial production in the 19 countries of the Eurozone recorded a historical slump, decreasing by 11.3 % compared to February and by 12.9 % compared to a year earlier. The COVID-19 health emergency has led to the urgent need to take a political position on the right to health of prisoners in Italian prisons. The UE legal framework will therefore have to comply with the decision of the ECHR Marcello Viola v. Italy on “the right to hope”, jurisprudence that does nothing more than reaffirm the primacy of UE jurisprudence over national jurisprudence, even in the pandemic emergency context.
CURRENT SITUATION, STRUCTURE AND MEASURES TO COUNTERACT BUSINESS CRIME IN CHINA
Authors: Dunmei Р.
Published: April 2021

Entrepreneurship is the main bearer of economic activity, which is why the company is central to public life, and moreover, the entrepreneur is recognised as the soul of the company. However, some entrepreneurs, unaware of the rule of law and responsibility, take risks in areas such as corporate finance, financial management, trade and product quality, which leads to an increase in crime among entrepreneurs, which to some extent limits the development of market economies. Entrepreneurial crime as a negative social phenomenon reveals institutional weaknesses in the functioning, management, control and other links of enterprises. In order to overcome previous risks, improvement of the concept, mechanism, organisation and methods of legal risk management should be organically combined with the production and management of the enterprise in order to form a system of prevention and effective prevention of entrepreneurial crime.
THE MAIN TRENDS OF THE CONSTITUTIONAL AND LEGAL REGULATING THE CHINESE PEOPLE’S ECONOMY REPUBLICS AT THE TURN OF THE ХХ AND ХIХ CENTURIES
Authors: Nevinskij V. V.
Published: April 2021

The article examines the essence and the main trends of constitutional and legal regulation of the Chinese economy at the turn of the 20th and 21st centuries. One of the obvious consequences along the way is the tendency to revive and enhance the role of “socialist law with Chinese specificity”. In the era of reform, the 1982 Constitution of the People’s Republic of China and the laws as the basis of the legal regulatory mechanism in various spheres of Chinese society, including the economy, are important. The peculiarities of building China’s legal system, including the reasons for a small share of state laws, are revealed. The analysis of amendments to the Constitution of the People’s Republic of China allows us to see the main features of the consistent development of constitutional and legal regulation of economic relations “with Chinese specificity” expressed by the constitutional principle of the “socialist market economy.”
REMOTE MONITORING AND VIDEO SURVEILLANCE IN THE WORKPLACE BETWEEN ITALIAN LAW AND THE CASE LAW OF THE EUROPEAN COURT OF HUMAN RIGHTS
Authors: D’aponte М.
Published: April 2021

The article considers the mechanisms of “defensive” remote control in labor relations. It analyzes different methods of collecting personal data and the purpose of their use in labor relations, as well as the impact of digitalization on labor relations and the variety of control tools. The author investigates the boundaries of remote control in the ECHR case law, including the decisions of Italian courts in the field of video surveillance and suppression of illegal behavior of employees. The author concludes that a new and more specific legislative regulation of the employer’s remote control is needed.
“NOTION ALARM” BY THE CARRIAGE OF GOODS BY DIFFERENT TYPES OF TRANSPORT IN RUSSIA AND ABROAD: THE COMPARATIVE ANALYZE
Authors: Bazhina M. A. , Shchekochikhina E. P.
Published: April 2021

The article deals with the problems of notions application by the carriage of goods by different types of transport. The absence of single approach both in theoretical part and in legislation base creates in Russia the ambiguousness of the definition of such notions as “multimodal transportation”, “intermodal transportation”, “direct mixed transport”, “mixed transport”, “combined transport”. Authors view existing approaches in Russia and abroad and make the correspondent conclusions.
The role of dyslipidemia in the pathogenesis of perinatal complications in pregnant women with diabetes mellitus
Authors: Kapustin Roman V. , Tsybuk Elizaveta M. , Alexeyenkova Elena N. , Kopteyeva Ekaterina V. , Arzhanova Olga N. , Oparina Tatyana I. , Tumasova Zhanna N.
Published: April 2021

Hypothesis/Aims of study: The prevalence of diabetes mellitus in pregnant women is increasing. Physiological hyperlipidemia is usually developed during the last third of gestation, increases during pregnancies complicated by diabetes mellitus. Abnormal lipid profiles are associated with adverse perinatal outcomes. However, the associations between maternal dyslipidemia and pregnancy complications in women with different diabetes mellitus types remain unclear. The aim of this study was to assess the lipid profile in women with different types of diabetes mellitus (Type 1, Type 2, and gestational diabetes) based on the therapy in the third trimester of pregnancy, to investigate the associations between serum lipid profile and perinatal complications, and to determine possible prognostic value of lipids in the development of adverse pregnancy outcomes.
Study design, materials and methods: The study included 277 women who were divided into several groups depending on the type of diabetes mellitus and its therapy method, a group of patients with preeclampsia, and the control group. We analyzed the clinical and laboratory data of outpatient and inpatient cards of pregnant women in the period between 2010 and 2017. Maternal blood samples were collected between 28 and 32 weeks of gestation. The samples were assayed for fasting triglycerides, total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol and very-low-density lipoprotein cholesterol concentrations, as well as the atherogenic index of plasma. We also assessed the incidence of gestational arterial hypertension, preeclampsia, intrauterine growth restriction, and preterm birth.
Results: Pregnant women with various types of diabetes mellitus were characterized by a significant rise in serum triglycerides and very-low-density lipoprotein cholesterol levels, an increase in the atherogenic index of plasma, and a significant decrease in antiatherogenic, high-density lipoprotein cholesterol levels. These changes were most pronounced in pregnant women with pregestational diabetes mellitus types and in groups receiving insulin therapy. Correlation analysis revealed weak positive correlations between serum triglycerides concentrations and macrosomia (r = 0.26) and between the atherogenic index of plasma and severe preeclampsia (r = 0.26). The analysis of the ROC curve showed that triglycerides, very-low-density lipoprotein cholesterol, and the atherogenic index of plasma are predictors of severe preeclampsia.
Conclusion: Diabetic pregnancies are associated with increased dyslipidemia, which plays an essential role in the pathogenesis of perinatal complications. Evaluating lipid profile markers in the third trimester of diabetic pregnancy may be valid predictors of severe preeclampsia.
Current relevance of non-invasive prenatal study of cell-free fetal DNA in the mother’s blood and prospects for its application in mass screening of pregnant women in the Russian Federation
Authors: Kalashnikova Elena A. , Glotov Andrey S. , Andreyeva Elena N. , Barkov Ilya Yu. , Bobrovnik Galina Yu. , Dubrovina Elena V. , Zhuchenko Lyudmila A.
Published: April 2021

This review article offers an analysis of application of cell-free fetal DNA non-invasive prenatal screening test for chromosome abnormalities in the mothers blood in different countries. The diagnostic capacities of the method, its limitations, execution models and ethical aspects pertinent to its application are discussed. The data for the discordant results is shown and analyzed. The advantages of the genome-wide variant of cell-free fetal DNA analysis and the problems concerning its application in the mass screening are described. The main suggestion is to implement the contingent cell-free fetal DNA testing model for the common trisomies (for the chromosomes 21, 18 and 13) into the prenatal diagnostic screening programs in the Russian Federation. This novel model is based on the results of the mass combined first trimester prenatal screening in four federal subjects of the country completed by 2019 and is offered as an additional screening in the mid-level risk group (with cut-off from 1 : 100 to 1 : 500 or from 1 : 100 to 1 : 1000) defined according to the first trimester prenatal screening results. The basic requirements for the implementation of the contingent model in the Russian Federation are stated.
Problems and negative features of contemporary russian system of preschool institutions (kindergardens) for children of early preschool age
Authors: Kuznetsova Tamara G. , Struzhkin Maxim L. , Rodina Elena A.
Published: April 2021

The appearance of this work governs by the modern requirements of the Russian Federation legislation, including Federal Law of 29.12.2012 No. 273-FL Education in the Russian Federation, Federal State Educational Standard, SanPiN and other regulatory acts of the Russian Federation Government with necessity to expand the network of preschool educational organizations having groups for young children and creating groups for infants starting from 2 months. The authors of the article analyzed the existing conditions in preschool organizations in our country and abroad. It is shown that in order to maintain health, successfully adapt and develop an infant and young child to preschool organizations, create groups for children up to a year old, it is necessary not only to bring the existing legal framework into line, but also to conduct a significant reorganization of the structure of preschool organizations, with the aim of creating adequate conditions for infants without harming the health of the newborn child and the social well-being of the family. It emphasizes the need to provide parents with recommendations for protecting health and preparing the baby for kindergarten by providing targeted financial assistance to parents for a conscious choice between home education and training in the context of early childhood care. Serious financial support is also required for preschool organizations to equip buildings and territories for the care, upbringing and safe development of children of this age. The need for the return of pediatricians, nurses, speech therapists, educators, psychologists to the staff of preschool organizations is emphasized that is the need for review in the direction of increasing staffing levels. A comparison is made of the preschool educational organizations work organization abroad and in Russia. Some features of the young children and infants psychophysiological and physical condition are briefly reviewed, and necessary recommendations are given to parents. The article discusses the possibility of improving the adaptation period to preschool educational institutions in Russian Federation without harming the health of young children and infants.
Tax monitoring – an effective environment for the internal control system of Russian Railways
Authors: Sivertceva Elena S. , Chibizova Julia A.
Published: April 2021

This article describes how to improve the organization's internal control system by means of tax monitoring carried out in JSC "Russian Railways" with direct access to the company's information systems in real time for tax officers.
Calculation of geometric dimensions of the levitation track
Authors: Kim Konstantin K. , Veshkin Vadim V. , Kron Igor R.
Published: April 2021

Background: The problemto reduce the metal content of the levitation track is important when we create the transport systems with magnetic suspension.
Aim is develop the reasonable recommendations to choose the geometric dimensions of the levitation track.
Methods: we usedthe main provisions of the electromagnetic field theory and the aspects of the Fourier theory.
Results: the optimal values of the width and thickness of the levitation track are justified.
Conclusion: when we choose the width of the track we should be guided by considerations related to material consumption and the appearance of the side electromagnetic forces. The values of these forces are bigger the greater the ratio of the transverse displacement of the excitation solenoid to the track width. From the point of view of electrodynamics the value of the order of several centimeters we can consider as the upper limit of the track thickness.
Hyperloop – prediction of social and physiological costs
Authors: Almujibah Hamad , Kaduk Sylwia Izabela , Preston John
Published: April 2021

Background: Hyperloop is a new technological concept for a very fast magnetic levitation train that would travel through soft vacuum tubes and could achieve a speed of up to 1,200 km/h. As a new transportation system, it might bring some challenges related to human factors that should be tested and considered when designing and propagating Hyperloop.
Aim: This paper used literature review to identify potential physiological and social challenges. Some of these challenges might be high speed, high acceleration /deceleration, large magnetic forces, safety concerns, air pressure, motion sickness and cost as potential human-related challenges.
Methods: In this case, the method of literature review aimed to evaluate the potential physiological effect of these factors on the passengers. It investigated physiological consequences of very high speed, high acceleration/deceleration, and a high magnetic field, as well as human factors of the Maglev trains.
Results: The literature identified high acceleration/deceleration, high speed and high magnetic field as potential risks or sources of discomfort for the passengers.
Conclusion: To the knowledge of the authors, it is the first attempt to identify social and physiological challenges related to the Hyperloop trains concept. It is aimed to inform the development and policies to achieve the safest and most comfortable transportation form.
Model for making decisions on renewal the railway rolling stock of a transport organization
Authors: Palkina Elena S.
Published: April 2021

Background: At present, there is an urgent problem of renovation of rolling stock characterized by a high degree in Russia. The leading position in the country's transport system belongs to railway transport. In the context of declining demand for transportation investments in railcars, which represent a significant amount of capital investment, require reasonable management decisions.
Aim: is to work out a decision-making model for renewal the transport organization's railway rolling stock.
Methods: of technical, economic, investment and financial analysis, decision tree, graphical modeling, system approach.
Results: The basic components of the decision-making model are determined. The key indicators of railway rolling stock renewal are defined, reflecting the criteria for making managerial decisions in the field of operational, investment and financial activities. A graphical model is proposed that interprets the decision support system for purchasing new railcars.
Conclusion: Using the proposed model of decision-making in the field of renovation of rolling stock allows to transfer this process to a qualitatively new level, based on the results of an objective assessment of the current and forecast state of the management object according to various alternative scenarios and based on the selection of the rational decision by comparing the expected results for each of the considered alternatives and analysis degree of their compliance with the determined goals due to its versatility and complexity.
Assessment of operational reliability indicators of pit rope-operated excavators
Authors: Moskvichev Vladimir V. , Kovalev Maksim A.
Published: April 2021

The results of the study of operation reliability indicators of rope-operated excavators for 20172019 in the conditions of the Kolyvansky coal mine of Siberian Anthracite JSC are presented. The analysis of changes in reliability indicators of the main groups of equipment is performed. The conclusion is made about the current level of reliability for the main groups of excavator equipment and the components of the equipment that require increasing operational reliability are identified. The rating of reliability among rope-operated excavators used in the conditions of the Kolyvansky coal mine has been compiled. Recommendations have been developed to maintain and improve the reliability of the main groups of equipment and they components for rope-operated excavators in operating conditions at the Kolyvansky coal mine.
Construction of culverts by pushing the finished links into the embankment
Authors: Averchenko Gleb A. , Pavlenko Anna D. , Zorina Evgenia A. , Naborschikova Darya N.
Published: April 2021

The object of research in this article is culverts, namely the technology of their construction. This topic is relevant in connection with the development of road construction, which in turn requires high-quality drainage, carried out in most cases by culverts.
The purpose of the study is to select and justify the most rational method of construction of culverts on roads and Railways. The article analyzes the advantages and disadvantages of the method of pushing finished links into the embankment. Various variants of pipes used in this method are considered, and the most suitable material and shape are selected. The features of operation of newly constructed culverts in the first year of their service are highlighted.
The result of the study is a proven advantage of the method of pushing finished links into the embankment, namely, using round-shaped pipes made of the most suitable material for performing these works-corrugated iron.
Linear asynchronous traction drive in urban rail and maglev transport systems
Authors: Nikitin Viktor V. , Strepetov Vladimir M.
Published: April 2021

The development of transport infrastructure of large cities with high population density and development should be carried out on the basis of innovative technical solutions, that allow to simplify the conditions of laying of tracks, reduce the cost of construction, reduce noise, provide comfort to passengers and reduce the cost of operating rolling stock. One such solution, the effectiveness of which is confirmed by foreign experience, is the use of linear asynchronous traction drive (LATD) in urban rail and maglev transport systems. This, in particular, allows to increase the allowable value of slope paths to 6065, reduce the vertical dimensions of rolling stock to 3.15 m, reduce the diameter of the tunnel by 2530%. The release of the wheel pair from the function of the implementation of traction effort makes it possible to apply on the wagons the articulated semi-frames of trolleys, that ensures better rolling stock in curves, and as a result - less wear of wheels and rails and less noise.
This article analyzes the advantages and disadvantages of LATD compared to the traction drive of traditional execution, considers variants of constructive performance of linear induction motors (LIM), processes of electromechanical energy conversion in LIM, the option of building a LATD control system is presented. The article examines the flat LIM, which have found use in the transport systems of major cities in Asia and America. The processes of energy conversion in LIM are distinguished by the presence of a longitudinal edge effect, which determines the distortion of the resulting magnetic field, which is manifested in the reduction of induction and the displacement of the peak of the induction distribution curve to the escaping edge of the inductor. This effect is particularly manifested in high-speed LIMs with high quality. When the linearity of the magnetic environment is allowed, the resulting electromagnetic force of the LIM can be considered as the sum of electromagnetic forces created by the main field, as well as the direct and reverse fields of the longitudinal edge effect. The edge effects reduce efficiency and power ratio of LIM. The article discusses ways to compensate for the edge effects, as well as an overview of the world experience of the use of LATD in rail and maglev transport systems.
The advantages of LATD and the world experience of its use suggest that for urban transport systems at speeds of up to 100-120 km/h this drive can be a real competition to traditional urban rail systems.
Tariff policy offers on the line of magnetic levitation transport
Authors: Fedorova Maria V.
Published: April 2021

Background: It is proposed to use maglev transport as the basis for the development of the transport system of urban agglomerations. Its operation requires a special high-speed infrastructure, new rolling stock. The project for the construction and operation of the maglev transport line (MLT) St. Petersburg Sertolovo has an extremely long-term nature, significantly affects the development of urban high-speed transport, and therefore its implementation is possible only within the framework of strategic management of the development of urban transport systems.
Aim: Commissioning of maglev transport lines in places of concentration of growing passenger traffic, which will help to reduce travel time, meet freight needs, improve the quality and increase travel safety when driving on dedicated lanes.
Method: The article has developed proposals for the tariff policy on the maglev transport lines. Also, a forecast of passenger traffic on the MLT line was given, taking into account the recommended tariffs for collecting tolls, and the potential income of the project on the MLT line was determined.
Results: The purpose of the introduction of this MLT line is to improve transport services and reduce the time spent on trips for the population of the city of Sertolovo by providing high-speed communications, improving the technical level of rolling stock and MLT stops, which significantly affects the comfort of passenger movement.
Analysing and modeling performances of a long-haul air route network
Authors: Janić Milan
Published: April 2021

This paper deals with analyzing and modelling performances of a long-haul air route network operating as the queuing network. The network consists of the routes/tracks with flight levels serving aircraft/flights as the service channels. The main network performances are the ultimate and practical capacity of service channels, the aircraft/flight demand, delays before entering and total time of aircraft/flights spending in the network, and the related generalized costs including those of airlines, air passengers, policy makers and society. The analytical models of the particular network performances and three routing or assignment models/procedures for matching the aircraft/flight demand to capacity are developed and applied to the long-haul air route network in the North Atlantic airspace between Europe and North America.
The results have indicated that. the network capacity has been strongly dependent on the number of routes/tracks and flight levels, i.e., service channels and their ultimate and/or practical capacity. The ultimate capacity has been mainly influenced by the ATC (Air Traffic Control) separation rules applied between aircraft/flights operating in the same directions. The practical capacity has been strongly influenced by the ultimate capacity and the average delays imposed on aircraft/flights before entering the network. The rather superior and close to optimal model/procedure for matching demand to capacity has been routing or assignment of the aircraft/flights demand in proportion to the ultimate or practical capacity of particular service channels minimizing the total generalized costs of the actors/stakeholders involved.
Unraveling the Diagnosis of Kiwifruit Allergy: Usefulness of Current Diagnostic Tests
Authors: D’Amelio CM , Bernad A , García-Figueroa BE , Garrido-Fernández S , Azofra J , Beristain A , Bueno-Díaz C , Garrido-Arandia M , Gastaminza G , Ferrer M , Díaz Perales A , Villalba M , Goikoetxea MJ
Published: April 2021

Objectives: To determine the usefulness of the in vitro and in vivo methods used in the diagnosis of kiwifruit allergy and to specifically assess the impact of seed proteins on sensitivity. Methods: We performed skin prick tests (SPTs) using various commercial extracts, homemade pulp, and seed extracts and prick-prick tests with kiwifruit on 36 allergic patients. The presence of specific IgE (sIgE) was assessed using the ImmunoCAP (kiwifruit extract), ELISA (Act d 1, Act d 2), ISAC, and FABER assays. Immunoblotting of seed extract was carried out, and a single-blind oral food challenge was performed with whole seeds in seed-sensitized individuals. Results: The prick prick test with kiwifruit demonstrated the highest diagnostic capacity (81.8% sensitivity and 94.1% specificity) among the in vivo tests. The sIgE levels measured using ImmunoCAP (kiwifruit extract) showed a similar sensitivity to that of global ISAC and FABER (63.9%, 59.5%, and 58.3%, respectively). Act d 1 was the major allergen. Sensitization to Act d 1 was associated with positive sIgE results to whole kiwifruit extract detected by ImmunoCAP (P<.000). A positive SPT result to kiwifruit seeds was associated with severe symptoms induced by kiwifruit (P=.019) as a marker of advanced disease, but not with clinically relevant sensitization. Challenge testing with kiwifruit seeds performed on 8 seed-sensitized patients yielded negative results. Conclusions: Sensitization to Act d 1 is associated with a positive result in conventional diagnostic techniques, whereas kiwifruit seed sensitization does not increase the sensitivity of the diagnostic techniques evaluated.
Clinical profile and outcome of snakebite poisoning in sub-district hospital Akhnoor
Authors: Sharma Chandan , Badyal Ashima , Kumar Sanjeev
Published: April 2021

Background: In a predominantly agricultural country like India, with rich in flora and fauna, long rainy season and rural background, the encounter between man and snake is a frequent occurrence. Viper-bites are more common than other poisonous snakebites. Only the cases of snakebite with severe envenomation reach the health care centers. This study was planned to analyze the presentation of complaints and symptoms in snake bite patients.Methods: This ‘record based descriptive observational study’ was carried out over a period of 6 months from May 2020 to November 2020 in Sub District hospital Akhnoor. A total of 96 patients with a history of snake bite and signs of envenomation were included in this study. Results: Incidence was higher among people from rural background (86.46%), more among males (67.71%) and highest among farmers (53.13%) and labourers (16.67%). Maximum no of snakebites took place during night and on the lower parts of body, mainly legs (54.17%); while the period of the study contained the peak rainy season of the region. As many as 39.58% of victims didn’t receive any kind of formal first aid at all and as many as 48.96% patients reported after a minimum delay of 6 hours, which could be considered as potentially fatal. Chief complaints among the reported patients of snake bite were found to be: Local edema, bleeding, vomiting, drowsiness, ptosis and Ophthalmoplegia.Conclusions: There is an urgent and dire need for awareness and education among rural population about the hazards involved and treatment of snakebite.
A Heat Pump-Based Multi-source Renewable Energy System for the Building Air Conditioning: The IDEAS Project Experience
Authors: Cesari Silvia , Natali Alessia , Larwa Barbara , Baccega Eleonora , Boschetti Micol , Mainardi Elena , Cavazzuti Marco , Piazzi Agostino , Mangherini Giulio , Vincenzi Donato , Bottarelli Michele
Published: April 2021

The current paper presents the state-of-the-art of the ongoing IDEAS research project, funded under the Horizon 2020 EU framework programme. The project involves fourteen partners from six European countries and proposes a multi-source cost-effective renewable energy system for the decarbonisation of the building envelope. The system features a radiant floor fed by a heat pump for the building thermal management. The heat pump can exploit sun, air, and/or ground as thermal sources through the use of photovoltaic/thermal solar panels, air heat exchangers, and shallow ground flat-panel heat exchangers. Thermal energy storage is achieved by means of phase change materials spread along several system components, such as: radiant floor to increase its thermal inertia, solar panels for cooling purposes, ground to enhance soil thermal capacity. Within the project framework, a small-scale building, featuring a plethora of sensors for test purposes, and two large-scale buildings are meant to be equipped with the renewable energy system proposed. The small-scale building is currently in operation, and the first results are discussed in the present work. Preliminary data suggest that while multi-source systems coupled with heat pumps are particularly effective, it is complex to obtain suitable thermal energy storages on urban scale.
Critical Design Issues of Heavy Fuel APUs Derived from Automotive Turbochargers. Part 1: Nominal Ambient Conditions
Authors: Piancastelli Luca , Ferretti Patrich , Santi Gian Maria , Scaltrini Alessandro , Cassani Stefano , Calzini Federico
Published: April 2021

Small, turbine-powered eAPUs (electric Auxiliary Power Unit) have poor off-design performance and efficiency. Turbo eAPUs remain competitive where efficiency is sacrificed to lightness and compactness. The first part of this paper summarizes the transformation of a very efficient, very large automotive turbocharger into an eAPU. A satisfactory solution for the design of the heavy fuel combustor has been found on the Giandomenico’s site. The performance of the APU is evaluated at the Garrett nominal air conditions (T0=302.6 K, p0=0.962 bar, dry air). The turbogas has an approximately linear braking torque from 50% to 100% load at nearly maximum efficiency. Below 50% load, it is more convenient to vary the maximum temperature of the cycle and adjust the generator torque. However, a better compromise can be obtained by coupling the APU with a battery that would supply the electric power under 50% load. The use of a recuperator is not convenient due to the increase in volume and the additional complication. The problem of the intake air filtering is particularly serious in dirty/sandy ground applications. Regarding efficiency, the turbogas is no match for the diesel eAPUs.
On the Direct Computation of the Flow Field Developing Around NACA 0012 Airfoil at Moderate Reynolds Number
Authors: D’Alessandro Valerio , Falone Matteo , Ricci Renato
Published: April 2021

The main of aim this work is to enable a previously developed solver to computations involving turbulent flows. Hence, the flow field developing around a NACA 0012 at Re = 5 ∙ 104, M = 0.4, α = 5° is adopted as benchmark. In this work we mainly address the correct definition of simulation settings in order to accurately capture the more relevant aerodynamic features of the aforementioned flow problem. Thus, all the results deriving from the iterative grid generation process are carefully described and discussed.