bluuebunny/crossref_metadata_2025 huggingface dataset:
Turkish Validity–Reliability of Breast Cancer Beliefs Scale and the Effect of Socio-Demographic Factors on Breast Cancer Beliefs
Authors: Aslan Hakime , Aktürk Ümmühan
Published: September 2021

Background/aim

This study was conducted to determine the validity and reliability of the Breast Cancer Cultural Beliefs Scale for women with breast cancer in Turkish society.

Materials and methods

The population of this study was composed of patients diagnosed with breast cancer who were treated for cancer in the Adult Chemotherapy Unit. A total of 178 women with breast cancer participated in this study.

Results

In order to determine the factor structure of the scale, principal component analysis was performed. Cronbach's alpha was used to determine the reliability of the scale scores. The results explained 62.93% of the total variance of the scale. The result of the Kaiser–Meyer–Olkin test was determined to be 0.813, and that of Bartlett's test was 723.56. Cronbach's alpha coefficient of the scale was .74.

Conclusion

It was determined that the Breast Cancer Cultural Beliefs Scale was a valid and reliable tool for assessing the cultural beliefs of women in Turkey.
Psychometric Evaluation of the Oldenburg Burnout Inventory for Nursing Students
Authors: Bulfone Giampiera , Badolamenti Sondra , Biagioli Valentina , Maurici Massimo , Macale Loreana , Sili Alessandro , Vellone Ercole , Alvaro Rosaria
Published: September 2021

Background

Higher education students, especially nursing students, have drawn more attention as a group that is vulnerable to the risk of developing burnout syndrome.

Purpose

To test the psychometric properties of the Oldenburg Burnout Inventory in Nursing (OLBI-N).

Methods

The OLBI-N validity and reliability was tested in a sample of 476 nursing students. The validity was assessed with explorative and confirmative factor analyses. For hypothesis testing, we evaluated the correlation between burnout and academic self-efficacy.

Results

Two factors (exhaustion and disengagement) were identified, and the confirmative factor analysis of the OLBI-N yielded a good fit. The OLBI-N was significantly correlated with academic self-efficacy (r = −0.37, 0.29, p < 0.01).

Conclusions

The OLBI-N is a valid, reliable questionnaire for measuring burnout among nursing students.
Adverse Childhood Experiences (ACEs): Development of an ACEs Knowledge Scale
Authors: Zhan Lin , Mou Xichen , Gill Marie
Published: September 2021

Background and Purpose

Adverse childhood experiences (ACEs) negatively impacting children’s health and later in their lives warrant necessity to educate nursing students about ACEs. The purposes of this study were to evaluate (a) nursing students' understanding of key concepts of ACEs using the ACEs Knowledge Scale (AKS) and (b) psychometric properties of the AKS.

Methods

A survey using AKS was conducted with randomly selected student participants (n = 344) to evaluate students' understanding of ACEs knowledge. Empirical validation of the AKS included content validity using Content Validity Index (CVI), reliability, and construct validity analyses.

Results

The results showed students in the Bachelor of Science in Nursing (BSN) program had increased knowledge of ACEs over pre-nursing students, and the BSN graduating students had increased knowledge related to trauma-informed care and building resilience. There were no significant differences in ACEs knowledge between Family Nurse Practitioner (FNP) and BSN students. Evaluation of psychometric properties of AKS revealed S-CVI/Ave=0.912, indicated excellent content validity based on the expert panel’s ratings. Cronbach’s alpha coefficient = .84 for the overall instrument indicated good reliability. Factor analyses were employed, showing that the 5-factor model gives good fit indexes, supporting the hypothesized factor structure of five key concepts.

Conclusions

The AKS has showed promising implications to future research, nursing education, and nursing practice.
Brief Spanish Zung Self-Rating Anxiety Scale: Dimensionality, Internal Consistency, Nomological Validity, and Differential Item Functioning Among Chronic Obstructive Pulmonary Disease Patients in Colombia
Authors: Campo-Arias Adalberto , Blanco-Ortega Jesús D. , Pedrozo-Pupo John C.
Published: September 2021

Background and purposes: The brief Spanish Zung Self-Rating Anxiety Scale is a ten-item tool available; however, there is little information about its psychometric performance. The study aimed to test the dimensionality, internal consistency, nomological validity, and gender differential item functioning of the scale in patients with chronic obstructive pulmonary disease (COPD) in Colombia.Methods: A psychometric study was designed. It participated in 408 COPD patients aged between 40 and 102 years.Results: The confirmatory factor analysis showed both one- and two-dimension structures with acceptable goodness-of-fit indicators. The brief Spanish Zung Self-Rating Anxiety Scale presented high internal consistency, acceptable nomological validity, and non-gender differential functioning.Conclusions: The brief Spanish Zung Self-Rating Anxiety Scale presents some good indicators of validity and reliability, and it can be used in the measurement of anxiety in COPD patients.
Psychometric Properties of the Turkish Version of the Modified Engulfment Scale: Relation of Self-Concept
Authors: Kaşlı Seher , Bademli Kerime
Published: September 2021

Background and Purpose

Modified Engulfment Scale (MES) measure the impact of a schizophrenic illness on an individual’s self-concept. The objective of this study was to determine psychometric properties of the Turkish form of MES (MES-T).

Methods

This cross-sectional study were included 162 schizophrenia patients with a convenience sampling method.

Results

Based on the results of factor analysis, five items were removed from the original version of the scale. It was determined that the MES-T consists of 25 items, and it has three factors: change in self-concept, belief in treatment, and future expectation. As a result of Pearson product-moment, low and moderate correlation coefficients were obtained between subscales, and moderate and high correlation coefficients were achieved between the subscales and total score of the scale.

Conclusions

The scale was found to be applicable for schizophrenia patients in Turkish population.
Translation and Validation of the Comprehensive Score of Financial Toxicity for Cancer Patients Into Arabic
Authors: Mejri Nesrine , Rachdi Haifa , Mnif Ahmed , Berrazega Yosra , Benna Houda El , Labidi Soumaya , Boussen Hamouda
Published: September 2021

Background and Purpose:We aimed to translate the Comprehensive Score of Financial Toxicity (COST) questionnaire into Arabic and to evaluate its reliability and validity.Methods:We applied the four-step translation method and conducted a pilot validation study over 179 medical oncology patients. Reliability was tested using the Cronbach alpha coefficient and test–retest stability. Validity was tested using the correlation with Functional assessment of Cancer Therapy-General score (FACT-G), factorial analysis and the content validity index.Results:Questionnaire showed high internal consistency and test retest reliability; Cronbach alpha coefficient was 0.77 and Pearson stability coefficient was 0.8. Convergent validity evaluation showed a statistically significant moderate correlation with the FACT-G (r= .42,p=.047). Content validly index was 0.93.Conclusions:The Arabic version of COST questionnaire, was a valid and reliable tool that could be used in clinical practice by healthcare providers to evaluate financial toxicity in Arab speaking cancer patients.
Development and Psychometric Testing of a Children’s Version of the Herth Hope Index
Authors: Herth Kaye , Sarasua Sara M.
Published: September 2021

Background and Purpose:Hope in children is critical however multidimensional tools to measure hope are almost nonexistent. The aim of study is to develop and psychometrically evaluate a multidimensional children’s version of the well-regarded Herth Hope Index for those 8–12 years old.Methods:Phase one; qualitative study of hope in children, construction of the Herth Hope Index – Child Version (HHI-C), and validation by focus groups. Phase two; pilot testing with 22 children. Phase three; psychometric evaluation with 125 children.Results:Cronbach’s alpha of 0.856 with 3-week test–retest reliability of 0.966. Construct validity supported factorial isolation of three factors: (a) inner positive readiness; (b) interconnectedness with self and others; (c) temporality and future.Conclusion:Psychometric findings support the use of the HHI-C as a multidimensional tool to measure hope in children.
Psychometric Testing of the Traditional Chinese Version of the Fear of Progression Questionnaire-Short Form in Cancer Survivors
Authors: Cheng Hui Lin , Li Man Chung , Leung Doris Yin Ping
Published: September 2021

Background and Purpose:Fear of cancer recurrence (FCR) is a frequent psychological adverse effect among cancer survivors. This study aimed to test the psychometric properties of the Traditional Chinese version of the 12-item Fear of Progression Questionnaire-Short Form (FoP-Q-SF).Methods:An online survey was conducted with 311 cancer survivors in Hong Kong. The factor structure, known-group validity, and internal consistency reliability were examined.Results:The values measuring validity is good, with acceptable goodness-of-fit indexes (RMSEA = 0.073, SRMR = 0.042, CFI = 0.954), moderate to large correlations with unmet needs (0.339–0.816), being female, younger, had completed treatment ≤ 2 years, and had undergone chemotherapy/radiotherapy scored significantly higher on the FoP-Q-SF. The Cronbach’s alpha of the scale was .922.Conclusion:High validity and reliability indicate the scale’s value in assessing FCR in Hong Kong cancer survivors.
The multiplicity of voices in the conformation and consolidation of extensionist proposals linked to educational inclusion
Authors:   Universidad Nacional del Litoral. Argentina, Arnau Short Pablo Misael , Espínola Sofía Soledad ,   Universidad Nacional del Litoral. Argentina, Reyes María Silvina ,   Universidad Nacional del Litoral. Argentina, Escobar Patricia Isabel ,   Universidad Nacional del Litoral. Argentina
Published: September 2021

La extensión universitaria implica siempre poner en juego, al menos, dos elementos centrales: sinergia y multiplicidad de voces. Por consiguiente, el presente artículo tiene por objetivo socializar de manera crí-tica la presencia de nuestros “socios” en la co-cons-trucción de saberes relevando para ello las diferen-tes voces durante diversos proyectos de extensión dinamizados por el Programa Educación y Sociedad: hacia una mayor inclusión educativa dependiente de la Secretaría de Extensión Social y Cultural de la UNL. Dividiremos este trabajo en tres apartados relacio-nados cada uno de ellos con proyectos anclados en el Programa. Estamos haciendo referencia a las prác-ticas de voluntariado social universitario, a los pro-yectos de enseñanza y aprendizaje de las Ciencias Experimentales y, finalmente, a los proyectos sobre educación rural. Volver hacia ellos resaltando las mi-radas de los actores nos permite repensarnos y ajus-tar la mirada propia.
Challenges of integrating teaching, research and extension: the experience of the subject ECAN at UNER
Authors:   Universidad Nacional de Entre Ríos. Facultad de Bromatología, Lomagno Claudia Marcela ,   Argentina, Lonardi Laura Inés ,   Universidad Nacional de Entre Ríos. Facultad de Bromatología; Argentina, Zanetti Diego Hernán ,   Universidad Nacional de Entre Ríos. Facultad de Bromatología; Argentina
Published: September 2021

El eje de este trabajo se inscribe en la integralidad de funciones y desarrolla la experiencia de la cá-tedra de Educación y Comunicación Alimentario Nutricional (ECAN) de la Licenciatura en Nutrición, perteneciente a la Facultad de Bromatología de la Universidad Nacional de Entre Ríos. Con el desafío de brindar al estudiantado la oportunidad de traba-jar en escenarios donde el aprendizaje y la enseñan-za son bidireccionales, que les permita involucrarse en la toma de decisiones del proceso de investiga-ción y en la resolución de problemas reales de la comunidad, nos propusimos diseñar prácticas de in-vestigación y extensión integradas al currículo uni-versitario. En este marco, se generó en 2018 el pro-yecto de Investigación Acción Participativa (IAP): “Concepciones y saberes educativos y comunicacio-nales sobre las prácticas comunitarias de preven-ción y promoción de la salud, destinada a jóvenes y adultos, de lxs profesionales y equipos de Salud de la ciudad de Gualeguaychú”, cuyas líneas de acción se constituyen en acciones de extensión crítica.
Automatic system for monitoring parameters of railway rolling stock wheelsets
Authors:   Ural state university of railway transport (USURT), Buynosov A. P. , Nagovitsyn V. S. ,   Ural branch of JSC VNIIZhT, Ivanov I. A. ,   Emperor Alexander I St. Petersburg State Transport University (PSTU), Kononov D. P. ,   Emperor Alexander I St. Petersburg State Transport University (PSTU)
Published: September 2021

The paper considers operating principles of an automatic measuring system for monitoring the control condition of railway rolling stock wheelsets developed by the team of authors. The paper also presents the description of the system and the hardware implementation of devices integrated in its composition.
Requirements for check-rail switch joints
Authors:   JSC VNIIZhT, Glyuzberg B. E. , Loktev A. A. ,   Russian University of Transport (RUT-MIIT), Shishkina I. V. ,   Russian University of Transport (RUT-MIIT), Berezovskiy M. E. ,   Russian University of Transport (RUT-MIIT)
Published: September 2021

The paper is devoted to a problem of passing of rolling stock wheelsets with minimum deterioration of a crossing joint of a switch. The authors have formulated criteria representing necessary and sufficient requirements, on the basis of which it is possible to determine permissible values of check-rails wear and dimensions of their gutters. The paper also presents a method for calculation of rolling stock passage on the crossing joint equipped with check-rails that are not connected to running rails. With the u se of the experimental and calculation method the authors have highlighted stages for determination of stress-strain condition of check-rails. The have analysed the operation of check-rails made of RK special profiles that are mounted to a running rail by inserts. As a result, the authors have assessed the advantages of application of check-rails with mounts that are not connected to running rails. Since the method of check-rails calculation for the operation in other parts of the switch is similar, they have analysed the operation of a protector checkrail for switches and discussed the efficiency and disadvantages of its application.
Assessment of vibrocompaction quality of concrete mixtures for making reinforced-concrete products
Authors:   Russian University of Transport (RUT-MIIT), Gusev B. V. , Dobshits L. M. ,   Russian University of Transport (RUT-MIIT), Nikolaeva A. A. ,   Russian University of Transport (RUT-MIIT)
Published: September 2021

The paper is devoted to determination of influence of vibration influence parameters at compaction of hard concrete mixtures designed for making reinforced-concrete sleepers. At poor quality compaction of a concrete mixture there is an uneven distribution of physical and mechanical indicators by length and width of products that negatively affects their future operation. The paper presents studies on determination of vibration influence parameters at compaction of concrete mixtures and provides recommendations on improvement of operation of existing technological lines.
Perspectives of application of complex-reinforced concretes in engineering structures of transport infrastructure objects
Authors:   Southern Federal University (SFU), Morgun V. N. , Bogatina A. Yu. ,   Rostov State Transport University (RSTU), Revyakin A. A. ,   Rostov State Transport University (RSTU), Morgun L. V. ,   Don State Technical University (DSTU)
Published: September 2021

The paper substantiates a necessity to improve operational properties of building products and structures that are used at construction of transport objects. It shows that the modern approach to design ated problem is in the course of fibre reinforcement of fused and cellular concretes. The work provides reference and experimental data on the level of positive influence of metal and synthetic fibre on operational properties of concretes of various structures. On the basis of experimental results the authors have presented a fundamental possibility of complex improvement of engineering structures properties by using bar fibre-glass reinforcement. As a result, they have formulated a number of perspective technologies suitable for creating building elements from fibre and complexreinforced concretes for transport objects.
Mathematical modeling of management of the strategic development of the staff potential of branch universities
Authors:   Ural state university of railway transport (USURT), Kalganova N. V.
Published: September 2021

The paper considers mathematical differential models of dynamics of the number of teaching staff of a railway university during a certain period of its functioning. Using the constructed systems of ordinary differential equations, a method for management of the strategic development of the staff potential of branch universities is proposed. In his research, the author relied on the works of Russian scientists, in particular, on the works [1-5]. To implement the principle of scientific approach, the article proposes a method for studying the regularities of dynamics of the number of university teaching staff, using mathematical tools and mathematical modeling. Modeling in this case makes it possible to reveal some patterns and contribute to the management of the strategic development of the staff potential of railway universities. The paper presents the analytical solution of the Cauchy problem for a system of differential equations with given initial conditions. The model built on the basis of differential equations has practical value, because it allows you to determine and predict the number of personnel of the university at the specified time. In this paper, on the basis of statistical analysis methods, the composition of the teaching staff by age is studied. Some negative trends in the groups of teachers that create risks in the provision of the university with highly qualified personnel are identified.
Improvement of the switch counter-rail lining design
Authors:   CHIPS - branch of the Ural State University of Railway Transport, Richter E. E.
Published: September 2021

The element of the upper structure of the railway track - the switch counter-rail lining is studied. A variant of the serial design of the PKZhDL-65-4 counter-rail lining is considered. The analysis of the failure rate of counter-rail linings is carried out, and the results of observations of the condition of the linings in different regions are presented. The destruction zone is localized and its character as a multi-cycle fatigue destruction is determined. The information about the conducted complex of experimental studies for investigation of the stress-strain state in the dangerous zone of the lining is presented. To carry out the design studies, the design schemes of the counter-rail lining were developed. Calculated studies of the influence of various factors on the level of stresses acting in the hazardous area of the structure are performed. The influence of the type of the design scheme, the stiffness of the rubber shock-absorbing lining and the properties of the sleeper material is studied. Variants of counter-rail lining designs for reducing the level of stresses acting in the dangerous zone are proposed. Computational studies were conducted to optimize the proposed lining options in order to reduce material consumption. The results of testing of new lining structures on the switches of the South Ural Railway are presented. The information about the conducted complex of experimental studies for investigation of the stress-strain state in the dangerous zone of the lining is presented. To carry out the design studies, the design schemes of the counter-rail lining were developed. Calculated studies of the influence of various factors on the level of stresses acting in the hazardous area of the structure are performed. The influence of the type of the design scheme, the stiffness of the rubber shock-absorbing lining and the properties of the sleeper material is studied. Variants of counter-rail lining designs for reducing the level of stresses acting in the dangerous zone are proposed. Computational studies were conducted to optimize the proposed lining options in order to reduce material consumption. The results of testing of new lining structures on the switches of the South Ural Railway are presented.
Investigation of the causes of damage to freight cars during disbanding on non-mechanized sorting slides and development of measures to prevent them
Authors:   Sverdlovsk Railway-Regional branch of Russian Railways, Tankeev S. V. , Kolodin A. E. ,   Sverdlovsk Infrastructure directorate, Sverdlov V. B. ,   Sverdlovsk infrastructure directorate, Nazarov A. V. ,   LLC «Intel Ross», Konev M. A. ,   LLC «Intel Ross»
Published: September 2021

The damage assessment of freight cars during shunting and loading and unloading operations was made. The need to review the normative documents regulating the relationship between the owners of rolling stock, owners of non-public tracks and the carrier is noted. The reasons for formation of damage on the wheel pairs of freight cars when disbanding on low-power sorting slides are considered. The conditions for ensuring the deceleration of detachments on non-mechanized sorting slides without damaging the wheels are determined. The analysis of methods for ensuring braking on low-power slides is carried out. A method was chosen to ensure the wheel set rotation by introducing a third body between the rubbing surfaces during the braking of cars, which will take over a part of the resulting heat flow, reducing the temperature and increasing the coefficient of friction in the «wheel-rail» contact zone. A method is proposed to provide braking on the non-mechanized sorting slide during shoe braking by applying a friction compound to a non-working rail. Laboratory tests were carried out, which showed that the introduction of a friction additive can achieve the necessary coefficient of friction to comply with the standard parameters of deceleration of the car in the braking zone.
Analysis of defects in residential buildings identifi ed during the warranty period
Authors:   Ural state university of railway transport (USURT), Gilev Leonid B. , Novikova Anna S. ,   Ural state university of railway transport (USURT)
Published: September 2021

The article is devoted to the analysis of defects in residential buildings identified during the warranty period. The purpose of the study is to reduce the costs of construction organizations during the warranty period of maintenance of residential buildings and improve the quality of construction. A residential complex consisting of twenty low-rise buildings was selected to study the operation of residential buildings and estimate costs. Key defects were identified and analysed. In the course of the research, a scheme of operational quality control has been developed, with the help of which it is possible to increase the level of quality management of construction and installation works, reduce the costs for construction organizations during the warranty period of service and, as a result, increase customer satisfaction and loyalty.
Physical culture in the formation of technological competence of a student in the new conditions
Authors:   Ural state university of railway transport (USURT), Chub Yana V.
Published: September 2021

The analysis of the problems of modern training of a specialist in a technical university is carried out. The necessity in shaping the capability to overcome problems (tasks) in the conditions of changes is determined. The organizational and methodological conditions for the formation of technological competence of a student as a professionally important quality of a specialist are identified, and a method for its formation is proposed. The possibility of improving the quality of professional education in the new conditions of remote training of students by means of «Physical Culture and Sports» discipline is determined. The stages of self-training of a student in physical education, which is a key element in the formation of technological competence of a future specialist, are presented.
Formation of an optimal logistics system based on the analysis of transport infrastructure of the city of Yekaterinburg
Authors:   Ural state university of railway transport (USURT), Zhuzhgova Yuliana E. , Savel’eva Viktoriya V. ,   Ural state university of railway transport (USURT)
Published: September 2021

The main problems of transport infrastructure of cities are the problems of interaction of different types of transport, optimization of route flows, technical backwardness, low capacity, low speed of travel on public transport, low comfort for passengers. Currently, this is complicated by the constant growth of population and the number of cars, which invariably results in the need for optimization of an urban logistics system. A comprehensive solution to the problems presented can be the building of a network of transport hubs as a new stage in the implementation of transport reform. The article analyzes the transport infrastructure of Yekaterinburg. Based on the ABC analysis of passenger traffic, a method has been developed to identify the stopping points of the route network, which can later be transformed into transport hubs. The optimal logistics system of Yekaterinburg has been formed, consisting of three transport and logistics hubs: “Bus terminal”, “Railway station”, “Professors’” (Professorskaya).
The influence of lubrication of rolling tracks of rails on the interaction forces when a freight train passes curved track sections with violation of the microgeometry of a railway track
Authors:   Ural state university of railway transport (USURT), Parakhnenko Inna L. , Grebneva Daria A. ,   Ural state university of railway transport (USURT)
Published: September 2021

The study, based on the results of modelling in the «Universal Mechanism» software package, considers the change in longitudinal and lateral forces that occur in curves of different radius when freight trains pass a track with existing violations of macrogeometry. The variants of lubrication of rolling tracks of rail threads, reducing the action of forces in curves and smoothing passing over unevenness, are considered.
System of contactless automatic voltage regulation of BARN with thyristor-reactor switching device
Authors:   Ural state university of railway transport (USURT), Tarasovsky Timofey S. , Limberg Arnold O. ,   Ural state university of railway transport (USURT)
Published: September 2021

The functional scheme of a closed system of contactless automatic voltage regulation of a converter unit with a thyristor-reactor switching device TRSD for voltage regulation is considered. The proposed external characteristics of the converter unit with the BARN and TRSD system when using the TRSNP-12500/10 converter transformer are presented. An algorithm for generating a control signal for an executive controlled thyristor – reactor switching device by the controller of the system – the SHAUN 6 cabinet-is considered, based on which the stable external characteristics of the converter are implemented on a laboratory physical model of a converter unit with a 30 kVA converter transformer.
Analysis of reliability of contact network devices on the Yekaterinburg-Chelyabinsk section
Authors:   Ural state university of railway transport (USURT), Andryukov Alexander V. , Kovalev Alexey A. ,   Ural state university of railway transport (USURT)
Published: September 2021

Damage to the contact network negatively affects the movement of trains: 70 % of failures lead to their delays. Breaks in the movement are more than an hour and in some cases reach three to four hours. The article analyzes reliability and failures of contact network devices on the South Ural Railway. The statistical data of failures of contact network devices from 2018 to 2019 are given, the nature of failures of technical means is determined. According to the map of climatic zoning, the share ratio of icy regions of the Russian Federation and branches of JSC «Russian Railways» is given. The sections of the Yekaterinburg - Chelyabinsk section are identified by climatic regions, which allows us to conduct a statistical analysis of failures in the selected sections associated with ice formation.
Analysis of the degree of infl uence of the removal rate of passenger trains for the passage of freight trains on double-track sections
Authors:   Tashkent State Transport University (TSTU), Rasulov Marufjan Kh. , Masharipov Masudjon N. ,   Tashkent State Transport University (TSTU), Abdullayev Zhasurbek Ya. ,   Tashkent State Transport University (TSTU)
Published: September 2021

The article is devoted to the analysis, calculations, and methods of determining the removal rate and the degree of its influence in case of mutual arrangement of freight and passenger trains on the traffic schedule. The article summarizes the results of mass analytical calculations for determining the removal rate, and provides calculations based on experimental train schedules. The calculation of the removal rate is carried out in a new way, which takes into account the factors that guarantee traffic safety and the most complete use of the available railway capacity, and also offers a calculation formula.
The use of the GLONASS system at the commercial enterprise «UMIT» LLC»
Authors:   Ural state university of railway transport (USURT), Samuylov Valeriy M. , Nevolin Dmitry G. ,   Ural state university of railway transport (USURT), Smerdova Alisa A. ,   Ural state university of railway transport (USURT)
Published: September 2021

The article describes the successful experience of using the GLONASS system at the commercial enterprise «UMIT» LLC (the SCATM (SCAUT) system «Satellite control, analytics and Transport Management»). The technical and technological features of the GLONASS system are noted, the principles of its operation and functionality are studied. The difference between GPS and GLONASS systems is demonstrated.
Digital feminist activism: Analyzing Jakarta Feminist as a collective identity, resources, network, information dissemination, and mobilization
Authors: Annisa Rifka
Published: September 2021

The use of social media for feminist activism in Indonesia has increased in decades. Some studies have mentioned digital feminist activism as the three intersectional relations of collective agenda, civic network, and digital infrastructure. To deepen, this study aims to analyze digital feminist activism works to organize collective identities, develop resources, coordinate networks, disseminate information, and mobilize social actors, in the case of Jakarta Feminist through a qualitative approach combined with social and textual network analysis. As a result, the Jakarta Feminist collective’s identity formed based on their identities, concerns, and defaces to the right of all Indonesian women, and other minorities group succeeded in developing resources in the form of moral, cultural, material, human, and network. Jakarta Feminist disseminated activism information by using social media features, and their members’ ties. Mobilized actors by conducting internal group planning, themes, and hashtags, boosted by social media personalities digital campaigns, individual and cross-organization. This study concluded that feminist digital activism running by the combination of their work in online and offline spheres. The cross-sectional interrelated of feminist activism to other issues, movements, and entities are interesting topics for future research.
Lagged Covariance and Cross-Covariance Operators of Processes in Cartesian Products of Abstract Hilbert Spaces
Authors: Kühnert Sebastian
Published: September 2021

A major task in Functional Time Series Analysis is measuring the dependence within and between processes, for which lagged covariance and cross-covariance operators have proven to be a practical tool in well-established spaces. This article deduces estimators and asymptotic upper bounds of the estimation errors for lagged covariance and cross-covariance operators of processes in Cartesian products of abstract Hilbert spaces for fixed and increasing lag and Cartesian powers. We allow the processes to be non-centered, and to have values in different spaces when investigating the dependence between processes. Also, we discuss features of estimators for the principle components of our covariance operators.
The Use of Drones in the Spatial Social Sciences
Authors: Hall Ola , Wahab Ibrahim
Published: September 2021

Drones are increasingly becoming a ubiquitous feature of society. They are being used for a multiplicity of applications for military, leisure, economic, and academic purposes. Their application in the latter, especially as social science research tools has seen a sharp uptake in the last decade. This has been possible due, largely, to significant developments in computerization and miniaturization which have culminated in safer, cheaper, lighter, and thus more accessible drones for social scientists. Despite their increasingly widespread use, there has not been an adequate reflection on their use in the spatial social sciences. There is need a deeper reflection on their application in these fields of study. Should the drone even be considered a tool in the toolbox of the social scientist? In which fields is it most relevant? Should it be taught as a course in the universities much in the same way that geographic information system (GIS) became mainstream in geography? What are the ethical implications of its application in the spatial social science? This paper is a brief reflection on these questions. We contend that drones are a neutral tool which can be good and evil. They have actual and potential wide applications in academia but can be a tool through which breaches in ethics can be occasioned given their unique abilities to capture data from vantage perspectives. Researchers therefore need to be circumspect in how they deploy this powerful tool which is increasingly becoming mainstream in the social sciences.
Effects of Molecular Iodine/Chemotherapy in the Immune Component of Breast Cancer Tumoral Microenvironment
Authors: Cuenca-Micó Olga , Delgado-González Evangelina , Anguiano Brenda , Vaca-Paniagua Felipe , Medina-Rivera Alejandra , Rodríguez-Dorantes Mauricio , Aceves Carmen
Published: September 2021

Molecular iodine (I2) induces apoptotic, antiangiogenic, and antiproliferative effects in breast cancer cells. Little is known about its effects on the tumor immune microenvironment. We studied the effect of oral (5 mg/day) I2 supplementation alone (I2) or together with conventional chemotherapy (Cht+I2) on the im-mune component of breast cancer tumors from a previously published pilot study conducted in Mexico. RNA-seq, I2 and Cht+I2 samples showed significant increases in expression of Th1 and Th17 pathways. Tumor immune composition determined by deconvolution analysis revealed significant increases in M0 macrophages and B lymphocytes in both I2 groups. Real-time RT-PCR showed that I2 tumors overexpress T-BET (p = 0.019) and interferon-gamma (IFNγ; p = 0.020) and silence tumor growth factor-beta (TGFβ; p = 0.049); whereas in Cht+I2 tumors, GATA3 is silenced (p = 0.014). Preliminary methylation analysis shows that I2 activates IFNγ gene promoter (by increasing its unmethylated form) and silences TGFβ in Cht+I2. In conclusion, our data showed that I2 supplements induce the activation of the immune response and that when combined with Cht, the Th1 pathways are stimulated. The molecular mechanisms involved in these responses are being analyzed, but preliminary data suggest that methylation/demethylation mechanisms could also participate.
Synthesis and In Silico Docking of New Pyrazolo[4,3-e]Pyrido[1,2-a]Pyrimidine-Based Cytotoxic Agents
Authors: Horchani Mabrouk , V. Heise Niels , Hoenke Sophie , Csuk Rene , Harrath Abdel Halim , Ben Jannet Hichem , Romdhane Anis
Published: September 2021

To explore a new set of anticancer agents, a novel series of pyrazolo[4,3-e]pyrido[1,2-a]pyrimidine derivatives 7a-l have been designed and synthesized via cyclocondensation reactions of pyrazolo-enaminone 5 with a series of arylidene malononitriles; compound 5 was obtained from 5-amino-4-cyanopyrazole (3). The structures of the target compounds 7a-l were investigated by spectral techniques and elemental analysis (IR, UV-Vis, 1H NMR, 13C NMR and ESI-MS). All compounds were evaluated for their in vitro cytotoxicity employing a panel of different human tumor cell lines, A375, HT29, MCF7, A2780, FaDu as well as non-malignant NIH 3T3 and HEK293 cells. It has been found that the conjugate 7e was the most active towards many cell lines with EC50 values ranging between 9.1 and 13.5 µM, respectively. Moreover, in silico docking studies of 7e with six anticancer drug targets, i.e. DHFR, VEGFR2, HER-2/neu, hCA-IX, CDK6 and LOX also was performed, in order to gain some insights into their putative mode of binding interaction and to estimate the free binding energy of this bioactive molecule.
Bioassay-guided Identification of Bioactive Compounds from Senna alata L. against Methicillin-resistant Staphylococcus aureus
Authors: Ladan Suwaiba Muhammad , Wada Yusuf , Mohammed Mustapha , Ibrahim Sani , Yusuf Kabir Musa , Olonitola Olayeni Stephen , Ahmad Mubarak Hussaini , Mustapha Sagir , Abdul Rahman Zaidah , Sha’ban Abubakar
Published: September 2021

Senna alata (Linn) Roxb. plant is widely used to manage various infections in folkloric medicine. Methicillin-resistant Staphylococcus aureus (MRSA) infection continues to be a major global public health problem. This study aims to investigate the bioactive components of S. alata leaves active against MRSA. The leaves of S. alata were sequentially extracted and fractionated using standard methods and screened for activities against MRSA. The diethyl ether active thin layer chromatography (TLC) spot was subjected to infrared (IR) and gas chromatography-mass spectroscopic (GC-MS) studies. The aqueous extract and diethyl ether fraction of S. alata leaves elicited the highest activity against the MRSA. The GC-MS analysis of the fraction produced 15 eluates; only the sub-fraction 13 was effective. The TLC analysis of the sub-fraction 13 revealed three spots; only the second spot produced activity. The GC-MS result of the spot showed six peaks. The spectral results for peak 3 match the data from the IR study suggestive of 9-octadecenoic acid methyl ester. Senna alata leaves possess bioactive compounds closely related to 9-octadecenoic acid methyl ester with potent antibacterial activity against MRSA.
Management of the Patella During Total Knee Arthroplasty
Authors: Held Michael B. , Gazgalis Anastasia , Sarpong Nana O. , Geller Jeffrey A. , Shah Roshan P. , Cooper H. John
Published: September 2021

» The optimal management of the patella during total knee arthroplasty (TKA) remains a controversial topic with no consensus.

» Patellar management techniques during TKA include patellar retention or resurfacing with or without patellaplasty, as well as circumferential denervation and partial lateral facetectomy (PLF).

» Special considerations such as patient age, etiology of disease, implant design, and surgeon preference should be accounted for when determining optimal management.

» We recommend that most patellae be circumferentially denervated, regardless of whether they are resurfaced, as the potential benefits outweigh the small associated risks.

» Evidence demonstrates improved functional outcomes with the addition of PLF to nonresurfaced patellae. There is currently a paucity of evidence of this technique with respect to resurfaced patellae.

» Patellar resurfacing adds additional costs and health-care resources that should be considered in the decision-making process.
Sabine Pass to Galveston Bay, TX Pre-construction, Engineering and Design (PED) : coastal storm surge and wave hazard assessment : report 4 – Freeport
Authors: Stehno Abigail , Melby Jeffrey , Misra Shubhra , Nadal-Caraballo Norberto , Gonzalez Victor
Published: September 2021

The US Army Corps of Engineers, Galveston District, is executing the Sabine Pass to Galveston Bay Coastal Storm Risk Management (CSRM) project for Brazoria, Jefferson, and Orange Counties regions. The project is currently in the Pre-construction, Engineering, and Design phase. This report documents coastal storm water level (SWL) and wave hazards for the Freeport CSRM structures. Coastal SWL and wave loading and overtopping are quantified using high-fidelity hydrodynamic modeling and stochastic simulations. The CSTORM coupled water level and wave modeling system simulated 195 synthetic tropical storms on three relative sea level change scenarios for with- and without-project meshes. Annual exceedance probability (AEP) mean values were reported for the range of 0.2 to 0.001 for peak SWL and wave height (Hm0) along with associated confidence limits. Wave period and mean wave direction associated with Hm0 were also computed. A response-based stochastic simulation approach is applied to compute AEP values for overtopping for levees and overtopping, nappe geometry and combined hydrostatic and hydrodynamic fluid pressures for floodwalls. CSRM crest design elevations are defined based on overtopping rates corresponding to incipient damage. Survivability and resilience are evaluated. A system-wide hazard level assessment was conducted to establish final recommended system-wide elevations.
VERTEBRATE TAPHONOMY OF TWO UPPER MIOCENE BONEBEDS IN WESTERN PROTO-AMAZONIA (SOLIMÕES FORMATION, BRAZIL): INSIGHTS FROM MACROVERTEBRATE AND MICROVERTEBRATE FOSSILS
Authors: MUNIZ FELLIPE P. , BISSARO-JÚNIOR MARCOS CÉSAR , GUILHERME EDSON , DE SOUZA FILHO JONAS PEREIRA , NEGRI FRANCISCO RICARDO , HSIOU ANNIE S.
Published: September 2021

The Niterói and Talismã sites comprise two of the most important fossiliferous deposits of the Neogene in Brazil. After 30 years of research, these sites have revealed rich assemblages of vertebrates and provided a glimpse of the Amazonian fauna and environment during the Miocene. Despite this, detailed studies that attempt to explain the genesis of these bonebeds are still scarce and hamper more robust paleoenvironmental and paleoecological reconstructions. Here we provide the first in-depth taphonomic analysis for both locations. Sedimentological and taphonomic evidence suggest that the depositional environments of Niterói and Talismã were similarly represented by shallow and calm waters in lacustrine/swampy contexts. We propose that the accumulation of bones and teeth is the result of attritional (day-to-day) mortality of organisms of the local community in a low sedimentation environment. The thanatocoenosis was exposed to biostratinomic processes for longer periods of time, which explains the high disarticulation, disassociation, fragmentation and loss of skeletal elements. The almost absence of weathering indicates that the aquatic environment slowed down the organic degradation of bioclasts, while the rarity of abrasion shows a limited influence of hydraulic flows in transporting and remobilizing bioclasts. Thus, both sites preserve mostly autochthonous to parautochthonous bioclasts, with a moderate level of time-averaging. Our results corroborate the hypothesis that lentic environments can present remarkable preservational conditions for the formation of attritional accumulations of vertebrate remains. Moreover, we show how the different collecting methods affect the description of preservational features and taphonomic interpretations of both fossil assemblages.
Analysis of the causes and conditions for the formation of surface defects on hot‑rolled products from peritectic steel grades obtained under the conditions OJSC “BSW – Management Company of the Holding “BMC”
Authors: Tereshchenko A. V. , Khodosovskaya N. A. , Odarchenko I. B.
Published: September 2021

OJSC “BSW – Management Company of the Holding “BMC” produces a wide range of carbon, high‑quality, alloyed and high‑carbon steel grades, among which a signifi ant share is peritectic grade steels. Basically, the steel of this group is used to produce rolled products intended for the manufacture of components for the automotive industry. The process of production and casting of these steels is characterized by the greatest instability and is often accompanied by rejects and forced sorting of products. This situation is typical for other metallurgical enterprises. Therefore, the search for technological solutions that ensure an increase in the yield while maintaining the existing productivity of metallurgical units is an urgent aspect of improving the technology of continuous casting of peritectic grade steels. At the same time, the main scientific and technical task is to obtain a stable quality of continuously cast billets, aimed at preventing and eliminating the formation of a number of characteristic defects, primarily cracks on the surface of continuously cast billets and rolled products. The search for methods and technological solutions to improve the quality of products made of peritectic grade steel is the goal of the ongoing research.
Characterization and Analysis of Anisotropic Relative Permeability
Authors: Pei Xuehao , Liu Yuetian , Gu Wenhuan , Jian Changsong
Published: September 2021

The relative permeability functions of two-phase reservoirs are extensively used in modern reservoir-engineering theories for calculations and numerical simulations. In recent years, the theory of anisotropic reservoir development has advanced rapidly, and the anisotropic absolute permeability of reservoirs has been characterized and applied accurately. However, if only the anisotropy of absolute permeability is considered while neglecting the anisotropy of relative permeability, the effective permeability used in the calculations will differ significantly from that of an actual reservoir. In this study, an anisotropy experiment on two-phase relative permeability, with oil and water, was conducted using natural sandstone without fractures, which demonstrated the existence of anisotropy in relative permeability and analyzed its mechanism. The properties and calculation methods for anisotropic relative permeability were studied under the symmetry groups of a rhombic system. Numerical simulations of the reservoir considering anisotropic relative permeability were performed. The results demonstrated that the anisotropic relative permeability significantly affected the development of the oil reservoir, which is primarily indicated by the significant difference in the seepage direction of oil and water, and the complicated oil/water distribution. The results of this study differed significantly from the conventional understanding of remaining oil distribution. The deformed well pattern established for the anisotropy of the absolute permeability indicated a decrease in the oil-recovery ratio.