bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of cost-effective enclosing structures with high heat transfer resistance
Authors: Meneiliuk Alexandr , Kyryliuk Stanislav , Cherepashchuk Larisa
Published: May 2021

Considered is the solution to the problem of choosing an economical option for the construction of low-rise buildings and the creation of new economical design solutions with high thermal performance. The well-known technologies of building construction are analyzed using qualitative, quantitative and comparative analysis. Quantitative indicators were selected, such as wall thickness, weight of 1 m2 of wall, resistance to heat transfer, area of premises, cost, durability, tendency to shrinkage. As qualitative indicators used: seasonality of the use of solutions, resistance to the formation of mold, decay and destruction, especially the delivery of building materials. The method of multi-criteria analysis was also applied to determine the most effective technology. Calculated the cost of various types of design solutions based on economic calculated simulations. The technological solutions were assessed by quantitative criteria on a ten-point scale, where the minimum and maximum values were assigned points 1 and 10, respectively. Graphic modeling of the compared construction options was carried out and the corresponding diagrams were built. Added “weight” coefficient of criteria for the final decision on the choice of the optimal technology for the construction of buildings. The most effective constructive solution was selected based on the results of a comparative analysis, taking into account the “weight” coefficient.
Development the concept of using XML-schemas and requirements for them for the transfer and storage of information, documents and materials included in the information model of capital construction objects
Authors: Chelyshkov Pavel , Volkov Sergey , Babushkin Evgeny , Zueva Diana
Published: May 2021

The lack of a unified structure of the information model at different stages of the life cycle for different types of capital construction objects and the lack of requirements for the composition and content of the information model causes the problem of transferring the information model of the capital construction object from one stage to another in order to exchange and analyze data on objects throughout the entire life cycle. cycle, which will allow to simultaneously take into account technological, financial, technical parameters and the time factor, maintaining the data in an up-to-date and complete state at any time for all participants in the investment and construction process, including management companies, operating, repair, construction, subcontracting, design and research organizations, supervisory and control bodies.

The goal of this article is to develop a concept for using XML schemas for transferring from one stage of the life cycle to another and storing information, documents and materials included in the information model of capital construction objects.
Advantages of applying the mixture when guniting on vertical surfaces of building envelope
Authors: Abramenko Anatoliy , Gorbaneva Elena , Semyenov Aleksey , Mishchenko Andrey , Loboda Dmitriy
Published: May 2021

Having studied the technological modes of applying the mixture by the guniting method on hard unyielding surfaces, we can conclude that the technology for applying building mixtures is formed depending on changes in a number of factors (including the strength characteristics and the rebound of the mixture from the vertical surface). Experimental study of the influence of the technological parameters of application on the efficiency of guniting with the classical method and application using a nozzle for vortex application allows us to visually detect the zones of rational application of this technology. Based on the experimental data, we carried out an analysis of the influence of the technological parameters of applying the mixture on the criterion indicators. For this, we investigated various methods [8, 9], processed the results and revealed dependencies, discovered unknown aspects of gunning with the use of a nozzle for vortex application of a construction mixture. The assessment showed a sufficient degree of coincidence of theoretical and experimental studies and the possibility of their practical application, on the basis of which we can conclude about the efficiency of the nozzle for the vortex application of the building mixture.
DATA-flow in the field of urban planning: basics, concept, methodology
Authors: Chelyshkov Pavel , Volkov Sergey , Babushkin Evgeny
Published: May 2021

This article discusses the basics, concept and methodology for constructing tools that implement data exchange processes, including an exhaustive list of necessary data for the formation of information models of capital construction objects at each stage of the life cycle, as well as a plan for the development of these tools that provide information exchange processes. The technical and technological foundations for the formation of a digital information model and a scheme for verifying information transmitted from stage to stage of the life cycle of a capital construction object are stated.
Automation of production programs by setting conditions of stabilization of the planned system
Authors: Yurgaytis Alexey , Kamolov Kamol
Published: May 2021

Formation of a production program is a time-consuming variable problem. To solve it, many conditions and constraints must be taken into account. Computer power allows one to quickly and accurately solve problems with many variables, unlike a person who relies on his intuition and experience. The following materials and methods were used: collection and analysis of data from construction companies of various sizes, mathematical modeling of the processes of distributing labor resources, graphic interpretation of information, computer modeling. The stages of the problem statement: description of the organizational and technological problem of distributing labor resources, mathematical formulation, modeling and algorithmization using well-known metaheuristic approaches. In the course of solving the problem, a genetic algorithm was used that allows one to quickly find solutions in equations with many variables. The following constraints were determined: deadlines, maximum and minimum number of workers at the facility, minimum number of transfer of resources, minimum involvement of a subcontractor. As a result, all the necessary mathematical models and initial data for the development of a computer program for the automated distribution of labor resources among the facilities of the production program of the construction and installation organization were obtained.
Reducing environmental risks in the construction of roads from asphalt concrete
Authors: Shevtsova Marina , Evdokimov Alexey , Konopelko Ivan , Bozhenko Alexandra , Ryzhko Arina
Published: May 2021

Roads, like a spider web, intertwine our world up and down, and every day people build hundreds of kilometers of roadway, sometimes without even thinking about the environmental friendliness of road construction methods. The urgency of the problem of dirty road construction should not raise questions in our time, and especially in the Russian state. The article highlights the issue of reducing the risks of environmental pollution during the construction of the road network, the issue of green building is touched upon. Focal points are highlighted, which are worth paying attention to during the preparation of documentation to reduce the risks of environmental pollution. As a result, conclusions were drawn on the list of materials that should be used in order to reduce the impact on the environment.
Application of the Craig-Bampton method to blade rotation
Authors: Leoro Jose , Borisenko Vladislav , Degilevich Egor , Didenko Anton
Published: May 2021

The Craig-Bampton method has repeatedly shown its effectiveness in modelling the deformable solid body motion and in practical experience of implementing this approach in engineering software. It reduces the motion equations system which is obtained by approximating small elastic displacements of the body finite element model with a set of acceptable modes. The application of this method in engineering improves the computing time performance and requires less computational resources. In this article the effectiveness of using the Craig-Bampton method for the blade rotation is evaluated. The need to consider the inertial relationship between large body displacements and elastic deformations was investigated. As a result of the numerical solution, it was obtained that the method works correctly for the investigated task. It allows us to conclude that the Craig-Bampton method is applicable for the blade rotation process.
Approaches to assessing the characteristics of a vehicle body based on a virtual test bench
Authors: Zhilenkova Elena , Cvetkov Pavel , Epifantsev Ignat
Published: May 2021

The paper deals with the problem of assessing the characteristics of a vehicle body on the example of a car body. Such systems allow not only to reduce the cost of design, but also to obtain a number of important estimates that are not available at the stage of full-scale tests. An assessment system based on a virtual platform and a digital twin is considered. It is shown that the acceptable accuracy of the estimates is provided by the sufficient accuracy of the mathematical model. Considerations on approaches to designing the structure of such software systems are presented. The problems of modeling and evaluation based on the digital twin of the designed product are considered. The relationship between the model, on the basis of which it is supposed to evaluate the characteristics, and the models of adjacent vehicle systems, requiring a similar approach based on a digital virtual platform, is considered. Attention is paid to the main estimated parameters of the model and limitations.
Principal modeling of technological support for sustainable construction projects
Authors: Beliakov Sergei
Published: May 2021

The rationale for the choice of technological solutions in the framework of construction design is largely interrelated with the effectiveness of solving problems that arise during the stages of the project life cycle. The modeling of the project's technological support is based on a systematic approach, which is a connecting element between various tools and techniques by presenting the project's processes in the context of the life cycle, as well as their mutual correlation with technological solutions. This approach eliminates the adoption of chaotic decisions in the process of project development, since its implementation occurs directly at the initiation stage. As part of a comprehensive solution to this task, a system of principles of technological support for construction projects has been developed, including the principles of unity, balance, compliance and synergy. The results obtained in the framework of the study, the key of which are the scheme of principal modeling of technological support for construction projects and the algorithm for modeling technological support for construction projects, develop approaches to scientific and methodological approaches to managing the effectiveness of investment and construction activities in general and, in particular, to the development and justification of design solutions for construction. The key aspect of the implementation of the developed algorithm is the analysis of processes, for the methodological support of which it is proposed to use the unified form “Card determinant of the technological solution”. Practical application of the results obtained in the framework of the research can be carried out in a number of areas within the processes and procedures of investment and construction design, development of project documentation, construction consulting, technological engineering, financial and technical supervision and audit
Modeling and formation of environmental safety management systems of construction technologies
Authors: Slesarev Mikhail
Published: May 2021

The structure of the components and control connections of the known environmental safety management systems of construction technologies (ESMSCT) have been studied; a method of ecological balance of innovative plans for the development of an object, territory, industry is proposed; the principles of the formation of construction technologies that provide ESMSCT with the necessary properties of stability have been studied: predetermination, stochasticity, globality, manufacturability, flexibility, efficiency, symmetry, harmony, organization and others; the following concepts were studied and selected for the formation of construction technologies: organization, sustainable development, environmental management, environmental marketing, environmental technical regulation, environmental standardization, environmental certification, environmental information paradigm.
Insulation systems for structures on pile supports
Authors: Zhukov Aleksey , Bessonov Igor , Medvedev Andrey , Zinovieva Ekaterina , Mednikova Elizaveta
Published: May 2021

Construction on problem soils or in permafrost conditions involves using of pile foundations with a ventilated space under the floor structure. In this case, additional thermal insulation is required under the first-floor structure (above the ventilated space). This problem is com-pounded by construction in cold regions. The goal of research was to develop insulation systems for buildings on pile foundations for different climatic zones, including conditions of the arctic region and other regions with a predominance of ever-frozen ground. With the help of the THERM computer program, the conditions of bidimensional heat interchange in the enclosing structures of a building with pile foundation were simulated. The construction of such buildings is practiced on problem soils. The resulting models were analyzed in terms of the thermophysical characteristics of the structures. As a result, the optimal version of the insulation system was chosen, effective both in the climatic conditions of the midland and in the especially cold conditions of Yakutia and Trans-Polar region (The Subarctic). This system included insulation with mineral wool slabs along the facade walls, with extruded polystyrene (XPS) foams along the basement part and the floor structure, and with roll polyethylene (PE) foams (with the formation of a seamless insulation shell) along the ventilated space under the floor structure and above, on top of insulation boards.
Senior population employment as a factor of rural areas sustainable development
Authors: Rubaeva Olga , Pakhomova Natalia , Nikitina Tatyana
Published: May 2021

The study aims to develop an informative model for the preparation of employment for seniors in rural areas. Aging of the rural population puts additional demographic pressure on the economy and is a factor in the sustainable development of rural areas, which play a significant role in ensuring food self-sufficiency in the region. The study was conducted in rural areas of the Chelyabinsk region. There was an analytical study of the demographic structure of villagers. There was studied employment and age structure of villagers. With the help of the economic-mathematical method there were calculated the employment rates of elderly people in rural areas, there were assessed the possibilities of involving older people to work in the real economy. The study includes three hypotheses explaining the relationship of the qualitative characteristics of employment of the seniors, the elderly and their reflection in the strategic development programs of rural areas, providing training for seniors. During the study and research it was found that all the hypotheses were confirmed. Thus, the informative model of employment provision of seniors in rural areas is practical importance and can be recommended for implementation in other rural areas.
Human capital in rural areas of the Chelyabinsk region
Authors: Abilova Ekaterina , Golovikhin Sergey
Published: May 2021

The significance and scientific novelty of the approach proposed in the article to the peculiarities of human capital formation in rural areas, acceptable for analyzing the current state of this phenomenon and constructing the optimal trajectory of its development, is substantiated, firstly, by taking into account the modern features of rural areas, including their multifunctionality; secondly, by positioning human capital not only as an individual, but also as a social phenomenon; thirdly, by integrating into the concept of such characteristics of human capital in rural areas as its relativity (network nature) and cumulativeness ( possibility of accumulation within territorial boundaries); fourthly, the identification of the human capital of rural areas as a complex adaptive system, spatially localized, associated with other systems, evolving under the influence of factors of micro-, meso-, macro-levels. The article discusses the concept of human capital in the context of rural areas and identifies their features. A logical scheme for the study of the peculiarities of the formation of human capital of agricultural business entities is proposed.
Digitalization of environmental education is the trend of its modernization and reform
Authors: Grevtsov Kirill , Kadeeva Oksana , Syritsyna Valentina , Ilchenko Oleg , Belov Alexander
Published: May 2021

Over time, the education system around the world has undergone dramatic changes. The traditional education system no longer meets today’s complex needs, where everything is dynamic and evolving at a very rapid pace. In today’s world, a huge number of transformations take place in every nanosecond. Therefore, a new, modern way of learning is needed to systematically cope with such transformations arising from the creation of vast amounts of information. Thus, to address the shortcomings of the traditional education system, the world is moving towards digital education, which solves all the problems and challenges of traditional education. The authors present a comprehensive analysis of the processes of digitalization of education, most actively proceeding in the modern world. The formation of the knowledge society and the digital stage of modern civilizational culture is still a continuous process, which itself is experiencing serious internal contradictions and problems, especially in our country. One of the serious obstacles to the modernization of education is the mismatch between the speed of educational resources and the rate at which the digitalization of the educational process itself is taking place, which is still very low. Education reform is presented in the article by the example of various forms of educational and extracurricular activities aimed at the active use of digital educational resources, including the citywide electronic journal and diary, which has been used for several years in many schools in Russia.
Interdisciplinary connections in teaching mathematical and environmental disciplines to students
Authors: Vinogradova Marina
Published: May 2021

This article deals with the implementation of interdisciplinary relations through the problems of applied nature of students studying in the specialty 23.05.04 Operation of railway doro on the example of the implementation of the discipline «Mathematics». The purpose of this article is to teach the student to solve problems of an applied nature that are of interest to the student. When using a subject-based learning system, interdisciplinary connections allow us to solve the existing contradictions between the disparate assimilation of knowledge and the need for their application, both holistic and complex, in the practical life of a person. As a result, knowledge becomes not only concrete, but also generalized, which gives students the opportunity to transfer this knowledge to new situations and apply it in practice. The article substantiates the need for interdisciplinary connections to reflect the integrity of nature in the content of educational material, to create a true system of knowledge and understanding of the world.
Technology of training future seafarers to work in a multinational ship crew
Authors: Nikonorova Marina , Kemalova Liliy
Published: May 2021

The article deals with the issues of the need of professional training of cadets to work in a multinational ship’s crew. The substantiation of the need to develop a technology for training future seafarers to be ready for joint work with representatives of various ethnic groups is presented. The characteristics of the components of socio-psychological technology are given.
Psychological-pedagogical problems and prospects of distance learning of students during the Covid-19 pandemics
Authors: Abuselidzeand George , Radzivilova Inna , Mohylevska Olga
Published: May 2021

The article analyses the psychological and pedagogical problems and prospects of the distance learning of students during the pandemic period. Studies have shown that the learning process during the quarantine in the spring of 2020 was stressful for all participants in the educational process. This was caused by the lack of previous experience of distance learning and the response from the government and the number of educational problems. It is proved that the problem of insufficient universal access to the internet and the equipment necessary for training has affected both teachers and students. The current situation shows that some teachers working at higher education institutions replaced remote classes with the form of written works, which led to excessive workload of students. Such methods do not contribute to the quality of material assimilation, but on the contrary, create additional stress. It is proved that computerization affects all spheres of human activity and is an important factor in changing the quality of society life. The authors note that in order to ensure the development of higher distance education, it is necessary to improve the regulatory framework in the field of higher distance education, create a computer infrastructure, prepare software for the introduction of electronic educational platforms, as well as train and retrain teachers for conducting distance education courses. It is noted that during the process remote technologies, teachers use various forms of work with students. In particular, including Zoom classes, Skype classes, web classes, where students independently study an educational resource, perform tasks and the teacher checks it and gives a mandatory review of the completed task. The algorithm for assessing the quality of distance learning systems is justified and the use of an integral indicator with weighting coefficients is proposed, which allows us to quantify the value of local quality indicators and complex quality characteristics of distance learning systems.
Readiness of teachers of agricultural universities to manage the process of distance learning
Authors: Zakharov Konstantin , Kunina Olga , Kalashnikova Olga , Tuana Ekaterina
Published: May 2021

The electronic educational environment is now being actively implemented in the field of vocational education all over the world. The concept of digital competence and the readiness of a university teacher to use the Moodle distance learning management system are considered. The study involved 45 respondents - teachers of the humanities at a technical university, 23 - with an academic degree, 21 - higher education without an academic degree. The described study based on the analysis of questionnaire answers reveals significant differences in the components of digital competence of teachers of different generations.
Human factor in professional activity of aviation maintenance specialists as an element of flight security
Authors: Dotsenko Liudmila , Kariaka Inna , Yahodzinskyi Serhii
Published: May 2021

Target of this article is to consider particularities of human factor influence in professional activity of aviation maintenance specialists. In consequence of theoretic analysis of studying of this problem were discovered preconditions and recent trends of development of human factor at specialists of this activity area as well as were identified structural components of mentioned phenomenon. According to that, the authors made a description of defining characteristics of manifestation of human factor in professional activity of aviation maintenance specialists: psychophysiological particularities of employees, professional requirements for carrying out of this activity and work conditions of those specialists. All this, at the opinion of authors, is one of determinants of human factor manifestation at aviation maintenance specialists. As to the improvement of professional activity level of specialists of this field, following levels of human factor manifestation at aviation maintenance specialists with precise hierarchic structure of its development were identified: sensory-perceptual level (work of human analyzer system), personal level (value-motivational aspect of carrying out of professional activity) and professional level (development of professional competence of personnel). At the basis thereof it was elaborated authors functional three-stage hierarchic model of human factor of aviation maintenance specialists. In order to decrease the risk of mistakes making by specialists during solving professional problems at any level of their committing, it was suggested a number of activities for improvement of human factor in professional activity of aviation maintenance specialists, which are directed to the development of sensory-perceptual, personal and professional levels.
Issues of gender pedagogy: teaching boys the masculinity (preschool childhood stage)
Authors: Mardashova Ramziya , Garnysheva Tatyana , Sharafetdinova Zemfira , Konovalova Elena , Khakimova Gulnara , Khakimova Nailya
Published: May 2021

The article deals with the issues of supporting and developing the gender identity of boys at the stage of preschool childhood. The authors argue that it is possible to form the socially determined ideas about males in boys and to teach them the gender behavior based on these ideas but it should be carried out at the stage of pre-school childhood. The article contains the material of the experiment including specially selected forms, methods and conditions for teaching boys the masculinity at a senior pre-school age. The scientific novelty lies in the fact that the totality of the findings contains a solution to the problem: the special forms and methods of working with preschoolers used in teaching allowed us to form specific features of gender-role behavior at a pre-school age. The theoretical significance is that the study defines the components of gender identity (cognitive, emotional-personal, behavioral) and their content, and identifies the factors that contribute to the development of gender identity in boys. The practical significance of the study lies in the applied orientation of the findings that can be widely employed in the practice of pre-school educational organizations.
Socio-ecological competence as a significant component of a university graduate
Authors: Lobeyko Yuri , Rodionova Valentina , Ivashova Valentine , Yengibaryan Lyudmila , Barazbieva Suleya
Published: May 2021

The article presents the results of studying the opinions of experts from the South of Russia about the demanded social and environmental competencies of graduates of higher education programs. An expert assessment of the competence profile of graduates was attended by 27 environmental specialists: municipal, state, supervisory management bodies that are engaged in environmental protection or environmental control. A comparative analysis of the actual labor functions indicated by experts and an assessment of the competencies of graduates in accordance with the Federal State Educational Standard showed the points of growth of the professional skills of future ecologists. Current trends (based on the review of publications) in the scientific discussion on the training of environmental specialists have been shown. The directions of improvement are formulated that are relevant for the training of ecologists in the South of Russia.
Synthetic and coal-water fuels improving is the instrument of industrial region sustainability increasing
Authors: Dobrovolsky Ivan , Sorokin Dmitry
Published: May 2021

New methods of processing bituminous and brown coal in synthetic and coal-water fuel production are now gaining relevance. On the one hand, this is dictated by the pragmatic need to reduce the dependence of industrial energy consumers on the prices and quality of hydrocarbon raw materials, especially in the context of the constant exacerbation of market restrictions associated with the pandemic and sanctions, on the other hand, there is an urgent need for environmentally friendly methods of using synthetic and coal-water fuels. The article discusses the currently used technologies for the production of synthetic and coal-water fuels. The authors identify its main disadvantages and limitations and propose a schematic diagram of a technological line for coal-water fuel production with a linear layout. It allows obtaining fuel with good fluidity and higher stability, high-calorie content, and low ash content with less energy consumption.
The mathematical model of producing winter diesel fuel (including logistic costs)
Authors: Nikonorov Valentin , Kutuzov Andrei , Nikonorov Viktor , Bagaeva Irina , Letta Anna
Published: May 2021

The authors reviewed the statistics of winter diesel fuel consumption in the Russian Federation for 2000–2017, revealed a positive growth rate. On this fact, the relevance of the study was substantiated. The complexity and importance of the refining process leads to the need for digitalization of oil refineries. The object of the study is obtaining winter diesel fuel, taking into account transport costs. The subject of the study is digitalization of the oil refining process on the base of constructing the mathematical model for obtaining winter diesel fuel, taking into account delivery costs. Main research methods: retrospective data analysis, synthesis, comparison, linear programming methods. The authors considered two stages of winter diesel fuel production: dewaxing a mixture of stages of hydrocarbon raw materials on zeolite and subsequent compounding. For each stage, the authors compiled a system of equations describing the process. The authors also compiled a target function for obtaining winter diesel fuel, taking into account the costs of receiving and delivering. The obtained mathematical model can be used to ensure the required quality of winter diesel fuel (in terms of sulfur content, density and flash point).
Greening of the agricultural sector as a condition for sustainable development of the Russian economy
Authors: Marinchenko Tatiana , Korolkova Antonina
Published: May 2021

Sustainable development of mankind, which consists in meeting the needs of the present day without undermining the possibilities of future generations, enshrined in the UN program documents, is becoming a necessary condition for the survival of civilization. The growing scale of global environmental problems makes it vitally important to find solutions to combine global economic growth and sustainable development of mankind with the preservation of the environment. Today, the issues of energy and resource efficiency of production are especially relevant, particularly in the agricultural sector, which environment burden has increased. In conditions of high global competition and aggravated issues of the world ecology, the country faces the task of modernizing its economy. The new national development goals of Russia directly resonate with the sustainable development goals defined by the UN and are reflected in the general policy of resource use and environmental protection. However, additional steps are needed to maintain positions in world trade. The paper formulates the prerequisites and solutions for the greening of agricultural production and identifies the leaders of the process, as well as the segment of producers, for which greening measures are factors of survival. Indicators of environmental efficiency, the use of which will make it possible to make greening measures the engine of the country's economic agricultural production, as well as goals and solutions for the greening of agricultural production are proposed.
Vibration and acoustic insulation properties of generalized phononic crystals
Authors: Xingguo Wang , Haisheng Shu , Lei Zhang
Published: May 2021

Based on the previous studies, the concept of generalized phononic crystals (GPCs) is further introduced into the cylindrical shell structures, and a type of cylindrical shells of generalized phononic crystals (CS-GPCs) is constructed. Subsequently, the structure field and acoustic-structural coupled field of that composite cylindrical shells are examined respectively in this paper. Considering the Bloch theorem is not capable of explaining the generalized periodic situation existing in this structure field, a new analysis method involving transferring matrix eigenvalue based on the mechanical state vector is proposed to calculate the energy band structure. Through observing the energy band structure, an obvious wave band gap is obtained when the elastic wave propagates in the CS-GPCs for modes with different order, whose forming mechanism includes two aspects, i.e., the wave front expansion effect and the Bragg scattering effect. In addition, we further explore the related influences of the longitudinal wave mode and shear wave mode in structure on these band gaps, and some conclusions are illustrated. For acoustic-structural coupled field, the expressions of the acoustic transmission coefficients for different modes are built, and the frequency responses are numerically calculated to verify the band gap characteristics of the CS-GPCs. Furthermore, the acoustic pressure distribution of the internal and external acoustic fields is also analyzed in detail, and the influence laws of the parameters (offset distance and frequency) of the line source on acoustical pressure distribution and its directivity are explored.
Status of Sentinel Lymph Node Biopsy in Endometrial Cancer
Authors: Taran Florin Andrei , Jung Lisa , Waldschmidt Julia , Huwer Sarah Isabelle , Juhasz-Böss Ingolf
Published: May 2021

The role of lymphadenectomy in surgical staging remains one of the biggest controversies in the management of endometrial cancer. The concept of sentinel lymph node biopsy in endometrial cancer has been evaluated for a number of years, with promising sensitivity rates and negative predictive values. The possibility of adequate staging while avoiding systematic lymphadenectomy leads to a significant reduction in the rate of peri- and postoperative morbidity. Nevertheless, the status of sentinel lymph node biopsy in endometrial cancer has not yet been fully elucidated and is variously assessed internationally. According to current European guidelines and recommendations, sentinel lymph node biopsy in endometrial cancer should be performed only in the context of clinical studies. In this review article, the developments of the past decade are explored concisely. In addition, current data regarding the technical aspects, accuracy and prognostic relevance of sentinel lymph
node biopsy are explained and evaluated critically.
Akzeptanz von digitalen Gesundheitstechnologien bei leichter bis mittelgradiger Depression – Eine qualitative Analyse aus der Perspektive von Betroffenen, Angehörigen und Leistungserbringern
Authors: Hafner Jessica , Schönfeld Simone , Tokgöz Pinar , Hrynyschyn Robert , Schlubach Arndt , Dockweiler Christoph
Published: May 2021

Ziel der Studie Die Nutzer*innenakzeptanz von digitalen Gesundheitstechnologien bei leicht- bis mittelgradiger Depression ist bislang rudimentär erforscht und wird in vorliegender Studie untersucht.

Methodik Es wurden problemzentrierte Einzelinterviews mit 3 Betroffenen, 3 Angehörigen und 13 Leistungserbringern (v. a. Medizin, Psychologie, Pflege) durchgeführt und qualitativ ausgewertet.

Ergebnisse Entlang der Unified Theory of Acceptance and Use of Technology wurden Haltungen von Betroffenen, Angehörigen und Leistungserbringern dargestellt. Die Leistungserwartung und unterstützenden Rahmenbedingungen stellen bedeutsame Prädiktoren für die Nutzungsintention dar.

Schlussfolgerung Die Ergebnisse bieten eine Basis, um im Folgeschritt die Kernbedürfnisse und Haltungen zu priorisieren. Im Sinne eines ethischen, nachhaltigen und ökonomischen Einsatzes ist weitere Forschung zur Nutzer*innenakzeptanz notwendig.
Carbon contamination reduced for ambient-pressure X-ray spectroscopy
Authors: Johnson-Groh Mara
Published: May 2021

Approaches to removing carbon contamination from titanium dioxide samples could improve surface science experiments.
Termination of pregnancy in Tasmania: access and service provision from the perspective of GPs
Authors: Ogden Kathryn , Ingram Emily , Levis Joanna , Roberts Georgia , Robertson Iain
Published: May 2021

Termination of pregnancy (TOP) is considered an important component of sexual and reproductive health internationally, but there are known barriers in Australia and countries worldwide. This study investigated the issues for GPs regarding aiding access to TOP and providing early medical abortion (EMA) services for Tasmanian women. Specifically, the aims of the study were to identify the knowledge and attitudes of Tasmanian GPs regarding TOP services and to determine which known barriers to providing EMA are most significant for GPs in Tasmania, Australia. A survey was developed and piloted based on previous qualitative research that identified known barriers to accessing TOP. Surveys were posted to all identified GPs in Tasmania with a reply-paid envelope. In all, 211 (27.4%) responses were returned. GPs identified difficulty accessing TOP services, particularly for rural women and those on a low income. Almost half the GPs, excluding conscientious objectors, indicated they would be interested in providing EMA services, but perceived barriers were significant. The most significant barriers related to accessing appropriate training and support. There was uncertainty around financial reward, support services, medical indemnity and access to the medical abortifacient medications mifepristone and misoprostol. In conclusion, accessing TOP remains an issue for Tasmanian women. Many Tasmanian GPs are interested in providing EMA services if barriers are addressed, but there is a lack of knowledge about the practicalities of implementing EMA. Providing practical support to GPs and increasing knowledge pertaining to EMA provision in general practice could improve access in primary care.
Cross-sectional study of sexual behaviour and health of gay and bisexual men in suburban Sydney, New South Wales, Australia: contrasts between sex venue and clinic attendees
Authors: Ooi Catriona , Donovan Basil , Lewis David A.
Published: May 2021

Abstract Background In Australia, men-who-have-sex-with-men (MSM) have higher rates of sexually transmissible infections (STIs) and HIV compared with heterosexual men. We compared demographics, behaviour and HIV/STI prevalence for MSM attending a sex-on-premises-venue (SOPV) or the local sexual health clinic (SHC) to determine key differences. Methods: Men attending a SOPV during onsite HIV/STI screening from November 2015 for 12 months were compared with MSM attending a local SHC for screening. Each group completed a self-administered questionnaire and STI/HIV testing. Data analysis was performed using SPSS. Results: Compared with SHC participants (n = 108), SOPV participants (n = 84) had a higher median age (47 years [range, 22–88] vs 33 years [range, 19–71]; P < 0.001) and less likely to report previous HIV testing (73% vs 89%; P < 0.01), STI testing (60% vs 90%; P < 0.001) or be vaccinated for hepatitis A (32% vs 65%; P < 0.001) or hepatitis B (35% vs 73%; P < 0.001). SOPV participants were more likely to be married, widowed or have a long-term female partner (39% vs 7%; P < 0.001) and have a higher prevalence of urethral and rectal chlamydia (7% vs 1%; P = 0.02 and 8% vs 2%; P = 0.03, respectively). There was no significant difference between the groups for detection of syphilis (4% vs 9%), gonorrhoea (5% vs 9%) or HIV (1% vs 0%). Conclusion: MSM attending the SOPV had higher anogenital chlamydial prevalence compared with those attending the SHC. They reported higher rates of sex with female partners, which may facilitate STI/HIV transmission to heterosexual populations. Our findings have implications for HIV/STI service provision, contact tracing and local health promotion initiatives.
Propagation dynamics of dipole breathing wave in lossy nonlocal nonlinear media
Authors: Guo Jian-Li , Yang Zhen-Jun , Li Xing-Liang , Zhang Shu-Min
Published: May 2021

In the framework of nonlinear wave optics, we report the evolution process of a dipole breathing wave in lossy nonlocal nonlinear media based on the nonlocal nonlinear Schrödinger equation. The analytical expression of the dipole breathing wave in such a nonlinear system is obtained by using the variational method. Taking advantage of the analytical expression, we analyze the influences of various physical parameters on the breathing wave propagation, including the propagation loss and the input power on the beam width, the beam intensity, and the wavefront curvature. Also, the corresponding analytical solutions are obtained. The validity of the analysis results is verified by numerical simulation. This study provides some new insights for investigating beam propagation in lossy nonlinear media
Sphere-shaped SiGe micro/nanostructures with tunable Ge composition and size formed by laser irradiation*
Authors: Li Xinxin , Deng Zhen , Wang Sen , Liu Jinbiao , Li Jun , Jiang Yang , Ma Ziguang , Du Chunhua , Jia Haiqiang , Wang Wenxin , Chen Hong
Published: May 2021

SiGe spheres with different diameters are successfully fabricated on a virtual SiGe template using a laser irradiation method. The results from scanning electron microscopy and micro-Raman spectroscopy reveal that the diameter and Ge composition of the SiGe spheres can be well controlled by adjusting the laser energy density. In addition, the transmission electron microscopy results show that Ge composition inside the SiGe spheres is almost uniform in a well-defined, nearly spherical outline. As a convenient method to prepare sphere-shaped SiGe micro/nanostructures with tunable Ge composition and size, this technique is expected to be useful for SiGe-based material growth and micro/optoelectronic device fabrication.
Josephson current in an irradiated Weyl semimetal junction*
Authors: Wang Han , Shen Rui
Published: May 2021

The influence of the off-resonant circularly polarized light on the Josephson current in the time-reversal broken superconducting Weyl semimetal junctions is investigated by using the Bogoliubov–de Gennes equation and the transfer matrix approach. Both the zero momentum BCS pairing states and the finite momentum Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) pairing states are considered for the Weyl superconductors. When a circularly polarized light is applied, it is shown that the current phase relation remains unchanged for the BCS pairing with the increasing of incident radiation intensity A
0. For FFLO pairing, the Josephson current exhibits the 0–π transition and periodic oscillation as a function of A
0. The dependence of free energy and critical current on A
0 are also investigated.
Calibration of the energy response matrix for X-ray detector CCD236
Authors: Zhu Y.X. , Lu J.B. , Li X.B. , Liu X.Y. , Cui W.W. , Han D.W. , Wang J. , Wang Y.S. , Zhao X.F. , Zhang S. , Wang G.F. , Chen Y.P. , Yu N. , Chen Y.
Published: May 2021

CCD236 is a new generation swept charge device (SCD) developed by e2v. It is designed for the Low Energy Telescope (LE) onboard the Hard X-ray Modulation Telescope (HXMT). The spectrum of the detector is a convolution result of the incident spectrum and the energy response of the detector. One can obtain accurate quantities of incident spectrum by fitting the model spectrum with the energy response. According to the two-dimensional interpolation method, an energy response matrix of CCD236 is generated using the calibration data obtained by the low X-ray calibration facility located at Institute of High Energy Physics. The accuracy of interpolation is better than 0.2 eV, and the full width at half maximum (FWHM) variation trend with energy of the RSP agrees well with that of the calibration data. After that, a double-gaussian model of Fe-55 source was convoluted with the energy response matrix. The result shows that the fitting residual is controlled within 3σ after considering a systematic error of 0.1%. The deviation of full-energy peak is less than 10 eV. The RSP can well characterize the response of CCD236 detector in the observable energy region.
Modeling and Simulation of Voltage Sag Assessment for Distribution Network Based on Total Coverage of Nodes
Authors: Lu Xiaoli , Yang Dongjunming , Wang Qunfei , Yin Zhongdong
Published: May 2021

The evaluation of voltage sag of power grid is to analyze the situation of voltage sag, to guide the planning, construction and transformation of power grid, and further improve the power quality. It is an important content in the current power quality research. In this paper, the fault point is regarded as a new virtual node, and the fault location is described by fault location parameters λ. The system node impedance matrix is expanded by calculating the self impedance and mutual impedance between the virtual node and the concerned node. Through the modeling and simulation of distribution network, short-circuit faults are set to analyze the voltage sag. According to the three-phase voltage sag waveform recorded by power quality monitoring system (PQMS), the fault type can be identified, and the fault line can be determined according to the PDR of SCADA system. Without considering the fault resistance, the fault type and fault line are known, so the fault location can be found only by solving the fault location parameters λ. Because of its parallel processing and good robustness, particle swarm optimization algorithm can find the optimal solution of the problem with large probability and fast convergence speed, so this paper chooses to use particle swarm optimization algorithm to solve the fault location parameters λ.
Design and test of a 10 kV HV brushing for triaxial HTS cable termination
Authors: Wu Xiaochen , Hu Ziheng , Zhang Bin , Wang Zhenzi , Wang Wei , Wang Zhe , Wang Bangzhu
Published: May 2021

The high voltage (HV) bushing design of insulation core, umbrella skirt, lead type, and production process were proposed according to the technical requirements of the 10 kV high temperature superconducting (HTS) cable system of Shenzhen Power Supply Bureau. The design took full consideration of the withstanding voltage, impulse voltage, partial discharge, thermal shock, and anti-condensation level. According to the proposed design, a verification prototype was built and tested. It subjected to five slow 77 K-300 K thermal shock cycles and five severe 77 K-300 K thermal shock cycles to verify its performance. The sensitive electrical quantities were tested after each cycle. After the 10 cycles, no degradation of performance and no breakdown or flashover occurred were found in the prototype. The results show that the design is qualified for the expected purpose.