bluuebunny/crossref_metadata_2025 huggingface dataset:
Project-based learning for undergraduate engineering students minoring in textile technology and design
Authors: Shuhailo Ya V , Derkach T M
Published: March 2021

The experience of application of methods of problem-based and project-based learning was described in the training of future engineers for the light industry. Methodological issues are considered, as well as practical recommendations are formulated, for the application of these methods in teaching professionally-oriented disciplines. Examples of project design and their content are given for two specialised disciplines. They are aimed at the development of students’ ability to creative thinking and problem-solving when working both independently and in a team. The method effectiveness is illustrated by the formation of students’ new competencies, and an increase in their motivation and experience in teamwork. The preferred styles of students’ learning were studied for student groups of four different enrolment years. The learning preferences are relatively stable over the four study years. On average, engineering students minoring in textile engineering and design demonstrate a tendency to active, visual, sensing and sequential learning styles. Project-based teaching methods are not universally suitable for students with different learning preferences. Moreover, the success in projecting under the studied conditions correlates with the existing learning preferences of student teams. Student teams succeed in the implementation of projects if they have a balance in the ref-act dimension with a limited preference of the active style. In other words, excessive activity and lack of reflective reflection hindered the successful completion of projects. In the sen-int dimension, the presence of a pronounced sensitive style is also favourable for design and implementation of class projects. Successes in projecting are mostly insensitive to changes in the vis-vrb and seq-glo dimensions. The introduction of the problem and project-based learning methods is useful for engineering students. They acquire new competencies, gain real experience of teamwork, and increase motivation to learn and develop creativity.
Students training for numerical control machines programming by means of computer-aided manufacturing tools
Authors: Holovnia V , Horodyskyi M , Tkachuk A
Published: March 2021

The article describes the analysis of computer-aided manufacturing systems introduction for the control program machines preparation with the numerical control into the technical students’ educational process. The main stages of teaching students the basics of control machines programming by means of addressing to manual programming and CAM-systems are considered. Recommendations for the control programs testing implementation without a numerical control machine, by means of numerical control machine simulators introduction into the educational process are given.
Using interactive scribe-presentations when teaching Ukrainian
Authors: Babakina O O , Otroshko T V , Shcherbak I V
Published: March 2021

The article is devoted to the urgent topic of using new modern information technologies in lessons in general and in the Ukrainian language lessons in particular. The authors of the article prove that multimedia presentations have become one of the most popular ways of visual accompaniment in the presentation of theoretical material. In the article the authors analyze the results of the external independent evaluation (EIE) of the Ukrainian language and literature from 2015 to 2018 as well as online testing results of students from the Australian, Canadian and Polish diasporas on the level of Ukrainian language proficiency. According to this analysis it is determined that the level of knowledge on this subject deteriorates every year. Relying on these statistics, scientists have proved the need to improve the quality of knowledge using multimedia presentations, which provide more effective perception of educational information by helping students to visualize it. The researchers have proved the effectiveness of using the PowToon service in teaching philological disciplines in the educational process. This article is a practical step-by-step assistant for teachers and academic staff in creating a scribe-presentation. The authors have analyzed in detail the peculiarities of the methodological approaches that are worth using for effective implementation of PowToon and PowerPoint in the educational process (competence (the ability to actualize available knowledge, skills, experience to solve the difficult tasks in professional activities), systemic (forms the relationship in the study of philology disciplines, systematizes and structures complex information, using them in teaching), informative (use of information and communication technologies in the study of philology disciplines). The effectiveness of using online (PowToon) and offline (PowerPoint) services to create multimedia presentations has been compared. The key stages of the scribe and the advantages of the scribe-presentation have been considered. Taking into account that information is absorbed and reproduced better when it is visualized, that is, through visual perception, therefore, it is proved that use of PowToon service is accompanied by positive emotions and high indicators in the students’ learning outcomes. It is confirmed by a reflection questionnaire at the end of the lesson. The questionnaire consists of five questions and is evaluated on a 10-point scale. After analyzing the responses to the questionnaire the authors have come to the conclusion that the use of the script-presentations has a better influence on the perception of new visual information; increases the motivation for learning, interest in a subject that prompts subjects of the educational process to develop their creative projects and use their knowledge in everyday life; saves teachers’ time while preparing for a lesson; inspires teachers and academic staff to give unusual lessons and provide new interesting teaching ideas, as well as create integrated lessons.
Exploring the experience of integrated teaching of the management core courses in a foreign language based on ICT use
Authors: Shavkun I H , Dybchynska Y S , Yudina O V , Bukharina L M , Shmygol N M , Shmygol Ye I
Published: March 2021

The authors search the solution to the practical tasks of the contemporary education characterized by the increasing role of individual work in implementation of ICT at the lessons and in the independent work, the development of new principles, strategies and methods of teaching within the framework of integrated learning. These novelties can be applied when teaching professional subjects and foreign language and will provide the effective learning process aimed at acquiring the necessary competencies. The research discusses the process of integrated teaching using ICT and defines the organizational and educational conditions of integrated building of professional and foreign language competences using ICT. The authors generalize the experience of implementation of contemporary innovative technologies in integrated teaching of the professional subjects and foreign languages and analyze the ways of the effective ICT use in the integrated teaching of the management core courses in a foreign language. The content analysis performed in the research provides the basis for classification of both positive and negative aspects accompanying ICT use in education.
E-learning in the present-day context: from the experience of foreign languages department, PSACEA
Authors: Tokarieva A V , Volkova N P , Degtyariova Y V , Bobyr O I
Published: March 2021

In the present context of COVID-19 lockdown, when pedagogies had to turn from in-person to virtual instructions, computer-mediated communication (CMC), including distance learning and e-learning, has come to the foreground to maintain the barrier-free educational environment. The three-dimensional model of the e-learning, which includes the principles of knowledge acquisition at ‘any place’, at ‘any time’, at ‘any speed’ is incomplete without the organisational culture component. To analyse what e-learning modes are used in a particular institution, to measure the efficiency of distance courses and, further, to suggest the most effective model and the ways of e-learning integration into a particular HEI according to its needs’ analysis was set up as the aim of this article. To achieve this aim, a complex of qualitative and quantitative research methods was applied. Therefore, in the first phase of our inquiry, a literature review was conducted in which we analysed the definitions of ‘distance learning’ and ‘e-learning’, traced the history of the question, and collected the main characteristics, quality parameters, and models of the distance and e-learning. On the later phases, we introduced the form ‘Analysis of the Distance Learning Tools Preferences’, disseminated among the teachers; a questionnaire ‘Distance Learning Mode of Work Satisfaction/Dissatisfaction’, disseminated among students, and ‘The Instructional Materials Motivation (IMMS)’ online survey by J.M. Keller to measure the efficiency of the distance learning courses design, also disseminated among students. The empirical data was collected at Prydniprovska State Academy of Civil Engineering and Architecture (PSACEA), the Department of Foreign Languages during March-May, 2020. Thirty instructors from the Department of Foreign Languages and twenty-three students from the first-third years of Foreign Languages studies who regularly participated in online lessons took part in the experiment. Based on the theoretical and empirical data, we got a picture of the e-learning state (in its first approximation) in our HEI, proved that the forms and questionnaires used in the experiment may serve as informative tools of quantitative measurement, drafted the format for further improvement of the e-learning in our organisation.
Assessing online education during the COVID-19 pandemic: a survey of lecturers in Ukraine
Authors: Bakhmat L , Babakina O , Belmaz Ya
Published: March 2021

The winter and spring of 2020 was a challenging time worldwide. The COVID-19 pandemic seriously affected all spheres of life: from an industrial decline to educational transformations. In order to continue the 2019/2020 academic year, higher educational institutions had to adjust in-class learning to online. This paper aims at assessing the satisfaction and acceptance rate of Ukrainian lecturers with online education, as well as indicating problems and benefits they had singled out. The technical side of online education was also of interest. Therefore, the study employed an online survey to investigate technical support and tools used during the quarantine, advantages and disadvantages of online teaching, the level of satisfaction and acceptance. The findings from the study suggest that lecturers got different levels of technical support and used an assortment of tools to organise online education. The study revealed that the main advantage was time efficiency, while internet connection and technical problems were the most commonplace problems. Other findings of the survey are that lecturers were partially satisfied with online education but showed low acceptance of online education.
Features of distance learning of cloud technologies for the organization educational process in quarantine
Authors: Vakaliuk T A , Spirin O M , Lobanchykova N M , Martseva L A , Novitska I V , Kontsedailo V V
Published: March 2021

The article substantiates the need to develop and implement a distance course “Cloud technologies in the educational process in quarantine”. It is noted that the purpose of the course was to acquaint teachers of general secondary education institutions, college teachers, vocational and higher education institutions with the basic possibilities of using cloud technologies to ensure the educational process in distance learning. The list of topics with which the students get acquainted is given: basic concepts, models of cloud services, architecture and proposals from leading cloud services companies; cloud services in the work of the teacher, the peculiarities of working with mail; cloud storage as an alternative to replacing conventional drives; opportunities to create documents with the provision of sharing rights to multiple users; opportunities to create Internet surveys using cloud technologies; opportunities to create presentations using cloud technologies; cloud-based means of creating smart maps; means of creating sites; cloud-based learning management systems (for example, Google Classroom). The peculiarities of the proposed distance course and the difficulties that the students had in performing certain tasks are identified and described. The statistical results of the course are given.
Shift from blended learning to distance one during the lockdown period using Moodle: test control of students’ academic achievement and analysis of its results
Authors: Polhun K , Kramarenko T , Maloivan M , Tomilina A
Published: March 2021

The article highlights the urgency of the problem of introducing blended learning into the educational process of institutions of higher education and ensuring the quality of education using the tools of e-learning management system. The experience of using electronic testing during the final control of students' educational achievements is covered. A thorough analysis of the results was carried out, in particular the relationship between current and final grades, test scores and its duration were established. The reliability of the test tasks separately and the test as a whole, among other indicators, were tested using mathematical statistics methods.
Media technologies and virtual practices in creative approaches to educational training of a social worker
Authors: Pokulyta I K , Kolotylo M O
Published: March 2021

The educational system has undergone significant transformations in recent decades, the main catalyst of which is the development of the information sphere of society. Both individual elements and the structural, substantive content are modified and updated. Among the vectors that determine the dynamics and direction of this process is the growing socio-cultural role of modern media, which are based on digital technologies as a globalization platform and the main type of communication. The change of the information code - digitalization of the media sphere, creation of new media platforms of social interaction initiates the need to build an educational system that meets the demands of today. Among the many factors that are currently relevant in educational approaches are media technologies. Their role in the training of specialists in various fields is growing symptomatically, as it is associated with the functions of “new media”, which for the subject of activity become transgressive guidelines for constructing reality. Educational and further professional activity of a social worker needs to be reconsidered in the context of innovative strategies, first of all formation of media technologies in social work. Their formation is based on modern principles of new media: interactivity of communication and gamification of virtual practices. In social work at different levels of activity of the representatives of this sphere, media competencies are in demand, which include mastery of instrumental methods of implementing game, virtual, art practices as a motivational resource, technology of initiating social activity, cultural-adaptive and creative orientation of social assistance clients. This issue includes the specifics of the profession of social worker through the prism of the possibilities of filling his case with a creative resource - the tools of media technology in social work. The article outlines both the potential of gamification and virtualization of media practices in the educational and further professional activities of a social worker, and points out the possible dangers of implementing these technologies for certain categories of people in need. The article is a research exploration in the formation of a professional strategy of a social worker based on the involvement of the latest media practices as an expansion of media tools, the implementation of a creative approach to helping the client of social services.
Development of informational and research competence of postgraduate and doctoral students in conditions of digital transformation of science and education
Authors: Leshchenko M P , Kolomiiets A M , Iatsyshyn A V , Kovalenko V V , Dakal A V , Radchenko O O
Published: March 2021

Digital transformation of education and science puts forward new requirements for training of graduate and doctoral students, in particular for development of informational and analytical competence. It is described in international documents governing scientific field. Analysis of digital systems and consideration of their services allows us to say that their existing list and functionality can be used to develop informational and research competence of postgraduate and doctoral students. It is confirmed that important role in development of informational and research competencies of postgraduate and doctoral students is given to digital technologies, in particular, to digital open systems. Their use contributes to improving and expanding opportunities in research, presentation of research results and image of the researcher and institution. Digital society requirements to informational and research competence of postgraduate and doctoral students are defined and described. They include: readiness and ability to carry out research activities; ability to search and select necessary information and data, their transformation, storage and transmission using digital technologies; ability to critically evaluate found information (check their accuracy, timeliness, expediency); ability to perform scientific research (organization, planning, conducting) with use of digital technologies. Course of experimental work is presented; the obtained results are given and their interpretation is carried out. Fisher's angular transformation was applied in order to confirm reliability of obtained results of experimental study. Experimental verification of the proposed methodological system of using digital systems in postgraduate and doctoral students training, aimed at the development of information and research competence confirmed its effectiveness and pedagogical feasibility.
Research of professional responsibility of students of technical specialities by means of information and communication technologies
Authors: Meshko H M , Habrusieva N V , Kryskov A A
Published: March 2021

The article is devoted to the use of information technologies for pedagogical research aimed at studying the formation of key competencies and learning outcomes in higher education institutions, in particular, the professional responsibility of students of technical specialties. The diagnostic capabilities of the ATutor system, which operates at the Ternopil National Technical University named after Ivan Pului (Ukraine), are presented. The process of data collection involving distance learning technologies and the results of the analysis of the study are described. The state of formation of professional responsibility in students of technical specialties is determined, the main problems and difficulties in the formation of professional responsibility of future specialists in the technical field are clarified, and the possibilities and role of social disciplines are revealed. The structural and logical scheme of integrating disciplines of a humanitarian cycle in a distance learning course “Professional Responsibility of a Technical Specialist in Modern Conditions” is presented.
The peculiarities of the usage of AR technologies in the process of hardiness of future professionals
Authors: Osadchyi V , Varina H , Falko N , Osadcha K , Katkova T
Published: March 2021

One of the main challenges of today is to increase the resilience of individuals to stressful environmental factors and preserve the quality of life and efficiency. Hardiness is a psychological phenomenon, the essence of which is a productive way out of the crisis towards personal growth. Taking into account the effectiveness of information and technological progress, the issue of internalization of AR technologies in the process of training a competitive, viable specialist who is able to mobilize and self-realize internal potential resources is vital. The scientific article analyzes the possibilities of using innovative AR technologies in the process of developing the hardiness of the future specialist on the basis of the implementation of competence and subject-personal approach to the introduction of AR technologies in the educational process in the system of higher education. The article describes the experience of integrated implementation of elements of augmented reality in the program of development of hardiness - Hardiness Enhancing Lifestyle Program based on the concept of BYOD. According to the results of the obtained empirical data the efficiency of using innovative AR technologies in the structure of mobile applications in the process of development of the components of hardiness of the personality of the future specialist is proved. Prospect for further research is the development of a methodology for integrated implementation of AR technologies in the practice of higher education in order to optimize the training of future professionals.
An electronic environment of higher education institution (on the example of Zhytomyr Polytechnic State University)
Authors: Morozov A V , Vakaliuk T A
Published: March 2021

The article considers the expediency of developing and using the electronic environment of a higher education institution. It was found that the existence of such an electronic environment of a higher education institution would allow us to effectively use the available resources of higher education. A model of the electronic environment of a higher education institution is proposed, which consists of 4 components: educational, scientific, organizational, and managerial. The structural elements of each of the components are described. An example of the implementation of such an electronic environment on the example of the Zhytomyr Polytechnic State University is considered. The personal offices of the student and the teacher, which are realized according to the given model at the Zhytomyr Polytechnic State University, are considered in detail. It is established that the indisputable advantage is the complete identification of the person who went to different parts of such an environment, another advantage is the integrated use of logins and passwords to all these components.
Application of the hierarchy analysis method for the choice of the computer mathematics system for the IT-sphere specialists preparation
Authors: Fedonuyk A , Yunchyk V , Mukutuyk I , Duda O , Yatsyuk S
Published: March 2021

Peculiarities of the usage of the hierarchy analysis method for the making decision on the choice of the most efficient computer mathematics system (CMS) used for the preparation of the IT-sphere specialists are in the focus of the research. Eight alternatives were selected for the hierarchy analysis method and seven criteria were considered. The alternative is chosen by means of figuring of the priority vector corresponding to each alternative. The alternative with the highest value is considered the right decision. The scale of impact was used that is the scale of evaluations for the paired comparisons of the advantage of the first object over other with meaning from 1 to 9. The basic criteria for which the alternatives are calculated were described in the course research; their characteristics were chosen, in particular functionalities, studying materials, on-line mode, mobile application, license, language support and an open code. The matrix of the paired comparisons for each criterion was constructed and numerical characteristics of these matrices were calculated – the highest own value, the index of compatibility and the index of the consistency of formulas. Every matrix is composed of the expert evaluations for the alternatives, which are the systems of computer mathematics used in the courses of mathematics. Based on the results of the calculations carried out the impact of the alternative was shown and the system having the highest impact was chosen.
Method for assessing the information content of factors forming the cognitive independence of students
Authors: Lavrov E , Logvinenko V , Siryk O , Kyzenko V
Published: March 2021

The article describes the problem of awakening the cognitive activity of students, arising due to revolutionary transformations in teaching technologies. It shows the need to study the factors that affect cognitive activity and assesses the information content of those factors. Based on the method of pair comparisons, a technology for ranking the factors affecting cognitive activity has been developed. A mathematical model of the formation and processing of expert assessment results and an example of calculations are given, and the feasibility of including the subsystem for evaluating factors affecting cognitive activity in the computer control system of the university is shown. The structure of an adaptive e-learning system based on the technology of taking into account the factors that form the cognitive independence of students is described Experiments carried out in 3 universities of Ukraine have shown that the use of the developed mathematical model and information technology allows to increase significantly academic performance and to decrease the frequency of refusals from independent work of students using the e-learning environment.
Research of indoor temperature data transmission using visible light communication technology
Authors: Grigoryeva S , Alimkhanova A , Batalova M
Published: March 2021

In this article, we consider a system for wireless data transmission via visible light. An experimental stand for temperature control is presented. Transmitting and receiving devices have been developed to organize traffic. A digital temperature sensor is connected to the transmitter. The transmitting device has a white light-emitting diode (LED) with a power of 3W, which performs the function of lighting and additionally transmits temperature data. A silicon photodetector is used to receive the signal. Data is controlled and processed by Atmega 328 microcontrollers, which are located in both devices. The signal is encoded using the Universal Asynchronous Receiver-Transmitter (UART) protocol. Experimental results of the system operation are presented, which show stable data transmission over a long period of time.
Some issues of developing fiber-optic systems for protection of distributed parameters
Authors: Mekhtiyev A D , Yurchenko A V , Neshina Y G , Alkina A A , Mekhtiyev R A
Published: March 2021

This article deals with the problem of ensuring protection of limited access objects and other objects of state significance from unauthorized access. There is given the analysis of systems already developed by Russian and foreign scientists. A passive perimeter security system is proposed for consideration the main element of which is an optical fiber. The measurement principle is based on controlling the magnitude of the additional dissipation losses under mechanical action measured in dB. There have been carried out field experiments using the proposed security system. In conclusion there are describes the results of the study using a reflectometer.
The model for computation of complex technical objects parameters based on subdefinite calculations
Authors: Konichenko A V , Ostrovskiy E O , Uryaseva M V
Published: March 2021

The generalized computational model for calculation of complex technical object parameters when solving the problem of monitoring and their functioning control has been realized. The model has the following features: realization in the context of calculations of subdefinite expansion of parameters values based on assignment function and availability of consideration objects structural dynamics
Quantum-mechanical model of thermally stimulated depolarization in layered dielectrics at low temperatures
Authors: Kalytka V A , Korovkin M V , Madi P W , Magauin B K , Kalinin A V , Sidorina E A
Published: March 2021

Built the quantum-mechanical scheme for investigating the spectrum of thermally stimulated currents of depolarization (TCDP), which allows to study the processes of relaxation of hetero-and homo-charge in hydrogen bonded crystals (HBC) with complex crystalline structure (layered silicates, crystal-hydrates), taking into account the distribution of relaxers (protons) over the energy levels of the quasi-discrete spectrum in potential image of the crystal lattice, and allows us to calculate the parameters of low-temperature relaxers by the Klinger method in the quadratic approximation over the external electric field. However, the calculation of the excess proton concentration operator was carried out in the quasi-classical approximation on the basis of the Fokker-Planck operator equation, which is solved together with the Poisson operator equation. By method of density matrix in the quadratic approximation in the external field calculated thermally stimulated depolarization currents on the basis of which the investigated size effects in the nanometer size layers associated with the shift of the maximum current of thermo-depolarization to low temperatures while reducing the thickness of the crystal layer.
Electromagnetic non-invasive glucometry: achievements and prospects
Authors: Yakubov V P , Makhmanazarov R M
Published: March 2021

This work is devoted to the study of technologies for creating a method for non-invasive measurement of glucose in human blood. A brief overview is given on some of the existing technologies and developments in the field of the radio range for electromagnetic radiation and for recording small changes in the dielectric properties of biological environment. It also presents a new technology for non-contact measurement of blood glucose concentration in phantom blood using magnetic field sensors.
Critical processor download planning device in the multiprocessor systems
Authors: Borzov D B , Basov R G , Titov V S , Sokolova Yu V
Published: March 2021

The article deals with the critical multi-processor systems, which can include high-availability objects, and which performance is critical for any kind of activity. Such as a person, country, company, organization, etc. In this case, failure leads to a reduction in the system’s response time and a further decrease in its performance, which means the availability factor. Thus, the usage of software solutions to this issue is unacceptable, and therefore it is necessary to use specialized hardware for load planning.
Research of fiber-optic displacement sensors
Authors: Madi P Sh , Gorokhov D A , Mekhtiyev R A , Nurmaganbetova M T
Published: March 2021

Research on fiber-optic displacement sensors in quarries is the main cause of the collapse of the sides of the quarry. To ensure safety and constant monitoring during the work at the quarry, sharpened fiber-optic sensors are used. Fiber-optic sensors and control cables of the communication line are made on the basis of single-mode optical fibers, which makes it possible to measure deformations and displacements of the mountain range at distances of 30-50 km with high accuracy. Optical fiber of the ITU-T G. 652.D standard is used to create fiber-optic pressure sensors (FOS). All tests were carried out in the laboratory. This article is a sample for studying the entire process of deformation and displacement of the mountain range. In the end, the results of the study will help to optimize the work at the quarry and prevent accidents
Algorithm for finding contours for the purpose of processing symbolic information in conditions of small symbol size and chromatic aberrations
Authors: Konanykhin A Yu , Konanykhina T N
Published: March 2021

In this article, modern principles of processing and working with images have been investigated and applied for specific tasks of character information recognition in conditions of small character size and image fuzzy due to chromatic aberrations, including non-fuzzy C-means, which have proven themselves with high accuracy and speed. processing of initial data. For ease of perception and a more understandable process, we conditionally divide the algorithm into several stages: image improvement and filtering in order to bring data to the optimal information load of the algorithm by suppressing non-maximum points; correction of intensity values according to the level of grayscale pixels; processing of the region of the image with symbolic information by distributing gray tones.
Algorithm for constructing the optimal trajectory A* for an unmanned aerial vehicle in three-dimensional space
Authors: Gutsal A V
Published: March 2021

This article discusses the adaptation of the algorithm for constructing the optimal trajectory A * to three-dimensional space, as well as computer modeling of this algorithm in the MatLab environment and the analysis of the results.
Radar methods for determining the thickness of dielectric layers
Authors: Tseplyaev I S , Davidenko D V
Published: March 2021

This paper describes two methods, the amplitude method and the method based on geometric optics. The methods were applied to practical data obtained by georadar tests. As a result, the refractive index and thickness of the investigated planar layered medium were calculated. When using the amplitude method, the refractive index of the investigated medium is 1.3, the thickness is 0.11 m. When using the method based on geometric optics, the refractive index of the investigated medium is 1.43, the thickness is 0.102 m. After comparing the results of these methods, it was found that the error of the amplitude method is higher than that of the geometrical optics method.
Visualization system for a radio images
Authors: Khmelev V L , Gromov M L
Published: March 2021

Radio wave tomography (radiotommography) allows restoring the shape of objects hidden behind radio-transparent barriers. Radiotommography detectors use this technology for location and visualization for metal, metalized, and dielectric communications in walls and floors. An interpretation of tomography images obtained during radio wave measuring is a difficult task for non-specialists. Moreover, they have no visual reference to the objects of the scene under exploration. To simplify a perception and analysis of the obtained data of radio wave measurements, we propose to combine digital radio and optical images of the scene. This article describes the solution to the problem of combining optical and radio wave images. It allows to estimate visually the size and position of the hidden objects.
Development of a PET/EPRI combined imaging system for assessing tumor hypoxia
Authors: Kim H. , Epel B. , Sundramoorthy S. , Tsai H.-M. , Barth E. , Gertsenshteyn I. , Halpern H. , Hua Y. , Xie Q. , Chen C.-T. , Kao C.-M.
Published: March 2021

Precise quantitative delineation of tumor hypoxia is essential in radiation therapy treatment planning
to improve the treatment efficacy by targeting hypoxic sub-volumes.
We developed a combined imaging system of positron emission tomography (PET) and
electron para-magnetic resonance imaging (EPRI) of molecular oxygen
to investigate the accuracy of PET imaging in assessing tumor hypoxia.
The PET/EPRI combined imaging system aims to use EPRI to precisely measure the oxygen partial pressure in tissues.
This will evaluate the validity of PET hypoxic tumor imaging
by (near) simultaneously acquired EPRI as ground truth.
The combined imaging system was constructed
by integrating a small animal PET scanner (inner ring diameter 62 mm and axial field of view 25.6 mm)
and an EPRI subsystem (field strength 25 mT and resonant frequency 700 MHz).
The compatibility between the PET and EPRI subsystems were tested with both phantom and animal imaging.
Hypoxic imaging on a tumor mouse model using 18F-fluoromisonidazole radio-tracer
was conducted with the developed PET/EPRI system.
We report the development and initial imaging results obtained from the PET/EPRI combined imaging system.
Aspects of the disordered harmonic chain
Authors: Fogedby Hans C
Published: March 2021

We discuss the driven harmonic chain with fixed boundary conditions subject to weak coupling strength disorder. We discuss the evaluation of the Liapunov exponent in some detail expanding on the dynamical system theory approach by Levi et al. We show that including mass disorder the mass and coupling strength disorder can be combined in a renormalised mass disorder. We review the method of Dhar regarding the disorder-averaged heat current, apply the approach to the disorder-averaged large deviation function and finally comment on the validity of the Gallavotti–Cohen fluctuation theorem. The paper is also intended as an introduction to the field and includes detailed calculations.
Analysis of accelerated methods testing piston engine for reliability
Authors: Gots A N , Amirseyidov Sh A
Published: March 2021

The analysis of accelerated bench methods of testing piston engines for reliability is carried out. For accelerated testing, it is necessary to reduce the engine operating time before failures occur. Although the loads on the engine parts during accelerated tests differ from the loads in real operation, it is necessary to ensure a qualitative similarity of real and simulated loading processes when organizing them. To assess the quality of accelerated tests, use the acceleration coefficients for operating time or acceleration over time. Various methods of accelerated testing are analyzed due to forcing the conditions for using a special working cycle of the internal combustion engine, for example, for such failures as coking of diesel injectors. For an accelerated assessment of the fatigue strength of the parts surrounding the combustion chamber, the firing surface is heated and then cooled with water. More severe external conditions can also be achieved by increasing the amount of dust supplied with air and oil, increasing or decreasing the ambient temperature. In such tests, after comparing failures during accelerated (model) tests, as well as in operation, the test methodology is adjusted.
Damping of pressure pulsations in the fuel system of the motor
Authors: Lepeshkin A A , Berdnikov L A , Korzhachkin M G , Panov V A
Published: March 2021

The paper presents results of works carried out to damp pressure pulsations in the fuel line of a gasoline engine to provide for the required environmental friendliness level. The paper describes testing of a modernized damped injector rail. Based on the obtained test results, conclusions were made on the efficiency of use of a fuel line damper reducing fuel pressure pulsations.
Developing an unmanned vehicle local trajectory using a reinforcement learning algorithm
Authors: Evdokimova T S , Sinodkin A A , Tiurikov M I , Fedosova L O , Kalyashina A V
Published: March 2021

This article describes the algorithm development for constructing a local trajectory for an unmanned vehicle or for implementation in an ADAS system using the reinforcement learning method. A special part is dedicated to reinforcement learning. One of the methods that is best suitable for the task conditions will also be implemented. This method will allow bypassing obstacles and reaching the specified short target points.
Natural nanomaterials as a basic for improving the environmental safety of transport systems
Authors: Chernyshev D O , Denezhko L V , Bazhenov E E
Published: March 2021

Presented ways to improve the environmental safety of motor vehicles using liquefied petroleum gas and natural nanotubes - chrysotile asbestos. The basic components of petroleum gases, their physico-chemical properties, the percentage of fuel in the gas and the effect on engine operation, and the advantages and disadvantages are designated gaseous fuel. Presented defects in the operation of vehicles with gas-cylinder units associated with the violation of integrity of pipelines and systems. It specifies the requirements for the safe operation of the gas-cylinder cars. The aspects of the use of modern molecular techniques, the use of carbon nanotubes to solve the environmental problems created by cars.
Use of active related transportation systems in the extractive industries of the national economy and protection complex
Authors: Bazhenov E E , Novopashin L A , Chernyshev D O
Published: March 2021

The range of practical applications of active articulated transport systems is considered (AATS). AATS have a lower specific pressure of the propellers on the supporting surface, all other things being equal with single machines. This allows you to increase the payload on the transport system, increase the off-road capability of vehicles and on supporting surfaces with low bearing properties. The presence of separate power and technological sections makes it possible to create a range of technological systems with different functional properties. It is most expedient to use AATS in the raw materials and extractive industries and in the defense complex.
Digital tracking control of the boost converter: prediction-based digital redesign approach
Authors: Shieh Cheng Shion
Published: March 2021

Several continuous-time tracking controllers of the DC-to-DC boost converters had been addressed, but few literature touched the digital tracking control because that was a challenging theoretical problem which consists of nonlinear, non-minimum phase and saturated control. Given a continuous-time nonlinear boost converter with continuous tracking control, this paper proposes a new sampled-data feedback laws from the available analog counterpart via digital redesign such that the state trajectories of the sampled-data closed-loop systems close to the continuous-time one in the sense of state-matching. An existing boost converter circuit has been demonstrated to visualize the feasibility of the proposed methodology.
Applying fuzzy statistics to evaluate and allocate resources in seven star grotto national park area
Authors: Li Chaojun , Chang Kuo Kuang , Ou Shih Ming
Published: March 2021

The purpose of this study is to use an objective function algorithm to establish the fuzzy number parameters of the fuzzy semantic scale, and then find the way to improve and the development and management of tourist attractions. This paper divides the development of the Seven Star Grotto National Park into three periods: 2001-2005, 2006-2010 and 2011-2015. Using expert scoring and field interviews, combined with the Seven Star Grotto National Park resource profile and Zhaoqing development profile, we quantitatively measured the overall resource level, resource value, scenic conditions and regional conditions of different time period.
Impact of COVID-19 pandemic on training of pharmacy residents and fellows: Results from a national survey of postgraduate pharmacy trainees
Authors: Moore W Justin , Webb Andrew , Morrisette Taylor , Sullivan Louisa K , Alosaimy Sara , Hossain Shahrier , Howe Zachary , Vlashyn Olga O , Paloucek Frank P , Rybak Michael J , Wang Sheila K
Published: March 2021

Purpose

The coronavirus disease 2019 (COVID-19) pandemic has impacted the activities of healthcare workers, including postgraduate pharmacy trainees. Quality training experiences must be maintained to produce competent pharmacy practitioners and maintain program standards.

Methods

A cross-sectional survey of postgraduate pharmacy trainees in the United States was conducted to evaluate training experience changes and assess perceived impacts on residents and fellows following the COVID-19 pandemic’s onset.

Results

From June 4 through June 22, 2020, 511 pharmacy trainees in 46 states completed the survey. Participants’ median age was 26 (interquartile range [IQR], 25-28) years, with included responses from postgraduate year 1 residents (54% of sample), postgraduate year 2 residents (40%), and postgraduate fellows (6%). Compared to experiences prior to the onset of the COVID-19 pandemic, fewer trainees conducted direct patient care (38.5% vs 91.4%, P < 0.001), more worked from home (31.7% vs 1.6%, P < 0.001), and less time was spent with preceptors per day (2 [IQR, 2-6] hours vs 4 [IQR, 1-4] hours, P < 0.001). Sixty-five percent of respondents reported experiencing changes in their training program, 39% reported being asked to work in areas outside of their routine training experience, and 89% stated their training shifted to focus on COVID-19 to some degree. Most respondents perceived either major (9.6%) or minor (52.0%) worsening in quality of experience, with major and minor improvement in quality of experience reported by 5.5% and 8.4% of respondents, respectively.

Conclusion

Pharmacy resident/fellow experiences were perceived to have been extensively impacted by the COVID-19 pandemic in varying ways. Our findings describe shifts in postgraduate training and may aid in the development of best practices for optimizing trainee experiences in future crises.
Whole-exome sequencing reveals potential germline and somatic mutations in 60 malignant ovarian germ cell tumors
Authors: Chen Juan , Li Yan , Wu Jianlei , Liu Yakun , Kang Shan
Published: March 2021

Malignant ovarian germ cell tumors (MOGCTs) are rare and heterogeneous ovary tumors. We aimed to identify potential germline mutations and somatic mutations in MOGCTs by whole-exome sequencing. The peripheral blood and tumor samples from these patients were used to identify germline mutations and somatic mutations, respectively. For those genes with copy number alterations (deletion and duplication region), functional annotation was performed. Immunohistochemistry was performed to evaluate the expression of mutated genes corresponding to CNA deletion region and duplication region. In peripheral blood, copy number loss and gain were mostly found in yolk sac tumors (YSTs). Moreover, POU5F1 was the most significant mutated gene with mutation frequency >10% in both CNA deletion and duplication region. In addition, strong cytoplasm staining of POU5F1 (corresponding to CNA deletion region and duplication region) was found in two YST and nuclear staining in two dysgerminomas tumor samples. Genes corresponding to CNA deletion region were significantly enriched in the signaling pathway of regulating pluripotency of stem cells. In addition, genes corresponding to CNA duplication region were significantly enriched in the signaling pathways of RIG-I (DExD/H-box helicase 58)-like receptor, Toll-like receptor and nuclear factor (NF)-kappa. Keratin 4 (KRT4), ribosomal protein L14 (RPL14), proprotein convertase subtilisin/kexin type 6 (PCSK6), poly(A)-binding protein cytoplasmic 3 (PABPC3), and sterile alpha and TIR motif containing 1 (SARM1) mutations were detected in both peripheral blood and tumor samples. Identification of potential germline mutations and somatic mutations in MOGCTs may provide a new field in understanding the genetic feature of the rare biological tumor type in the ovary.