Wireless Covert Channel With Polarized Dirty Constellation in Backscatter Communication

Ambient backscatter communication has become a low-cost and green solution to next-generation Internet-of-Things (IoT). In this paper, we investigate a problem of wireless covert communication in backscatter communication system. The purpose of covert communication is to hide the process of communication and avoid being detected by eavesdropper. Covert messages are modulated into a random-like noise, and then superimposed on the carrier signal. Specially, we propose a wireless covert channel with polarization dirty constellation (WCC-PDC), which is polarized to solve the problem of low signal power in backscatter communication. Some methods are used to combine covert code block with carrier information block and increase the undetectability of covert communication. Additionally, successive-cancellation decoder and successive-cancellation list decoder are adopted to improve the reliability of WCC-PDC. Simulation results are finally provided to verify the improvement of undetectability and reliability with WCC-PDC.

Development of distant online learning in universities of Yakutia during the COVID-19 pandemic

The manuscript presents the organization of online distance learning for students of the three universities by means of digital education technologies at worldwide quarantine period due to COVID-19. The purpose of the study is to increase the level of subject competence among students in the context of organizing distance online education during a pandemic, taking into account the specifics of regional education. A study involved the survey method considering the specifics of the organization of online learning in the regional education system with statistical processing of data from the research results. The results allowed for increasing the efficiency of work with students in conducting classes in the disciplines of the information block during a pandemic using the Moodle platform, which reasonably indicates the need to consider the peculiarities of the educational environment in the development of subject competence among students of three universities of the Republic of Sakha (Yakutia).

THE USE OF THE DIGITAL ENVIRONMENT IN THE EDUCATIONAL PROCESS OF PEDAGOGICAL UNIVERSITIES

The article highlights the problems of forming a digital educational environment on the example of the North-Eastern Federal University named after M. K. Ammosov (NEFU) and the ways to solve them at the NEFU Pedagogical Institute. The teacher education system is characterized by a special feature: when forming the teacher's personality, all levels of the education system should be involved: general, secondary professional and higher, with active interaction with students, employers and interested communities. The educational situation that arose as a result of the announced regime of self-isolation, activated the forced management decisions on the organization of the educational process in the remote mode. This article presents practical solutions to the organization of the educational process in the discipline of the information block of the educational program of pedagogical education through the use of an interactive educational platform. The necessity and timeliness of creating a digital educational environment is justified, as a condition together with the universities of the Republic of Sakha (Yakutia) for their further transfer. The key characteristics of the digital educational environment and its significance for the training of future teachers and teachers of digital education are identified. A local digital educational environment has been developed for studying the discipline "Infocommunication Technologies" to ensure the educational process with the use of distance learning technology. The conclusions and assumptions of the upcoming systematic activity on the introduction of an online format in the implementation of educational programs in a standard educational situation may be of interest to teachers of higher school and secondary vocational education and heads of educational organizations.

Real-Time Animation Complexity of Interactive Clothing Design Based on Computer Simulation

With the innovation of computer, virtual clothing has also emerged. This research mainly discusses the real-time animation complex of interactive clothing design based on computer simulation. In the process of realizing virtual clothing, the sample interpolation synthesis method is used, and the human body sample library is constructed using the above two methods (primitive construction method and model reconstruction method) first, and then, the human body model is obtained by interpolation calculation according to the personalized parameters. Building a clothing model is particularly important for the effect of trying on. The clothing that needs to be displayed can be scanned and then input into the computer to build the model. The model can be directly built in 3DMAX and other software and then its surface texture can be mapped, or the clothing model can be directly built. The 3D model in the 3ds file is loaded by the loop body nested switch branch selection structure. Correspondingly, the write-back operation of 3ds files is similar. Just follow the general structure of the 3ds file and write the root block, version information block, edit information block, key frame information block, etc. to a brand new file in sequence. The main reason for this article to perform the 3ds file write-back operation is that, after the clothing model is dynamically simulated through the dynamic principle, the deformed key animation frame needs to be saved as a 3ds file so that it can be further imported into the 3DSMAX software and generated by the renderer, form high-quality picture information, and finally get high-definition animation video. In the CPU-GPU hybrid method, modules such as force calculation, collision processing, and position update use the GPU method, while overstretching is processed by the CPU method, making the overall performance 10 times higher than the pure CPU method. This research helps to promote the development of 3D virtual clothing design.

Performance comparison of channel coding schemes for 5G massive machine type communications

<p><span>Channel coding for the fifth generation (5G) mobile communication is currently facing new challenges as it needs to uphold diverse emerging applications and scenarios. Massive machine-type communication (mMTC) constitute one of the main usage scenarios in 5G systems, which promise to provide low data rate services to a large number of low power and low complexity devices. Research on efficient coding schemes for such use case is still ongoing and no decision has been made yet. Therefore, This paper compares the performance of different coding schemes, namely: tail-biting convolutional code (TBCC), low density parity check codes (LDPC), Turbo code and Polar codes, in order to select the appropriate channel coding technique for 5G-mMTC scenario. The considered codes are evaluated in terms of bit error rate (BER) and block error rate (BLER) for short information block lengths (K ≤ 256). We further investigate their Algorithmic complexity in terms of the number of basic operations. The Simulation results indicate that polar code with CRC-aided successive cancelation list decoder has better performance compared with other coding schemes for 5G-mMTC scenario.</span></p>

Prospects for digitalization of agricultural industries (using the example of an infrastructure block)

For the infrastructure block of the agro-industrial complex, a program has been developed that allows determining the rational air pressure in the tires of multi-axle wheeled vehicles. The developed software contributes to the transfer of the information block of the agro-industrial complex to a digital basis. Its use allows you to reduce fuel consumption, increase the economic efficiency and environmental friendliness of transportation. The use of software in the educational process makes it possible to form professional competencies of agribusiness specialists in accordance with Federal state educational standards and educational standards.

TAKING INTO ACCOUNT THE DYNAMICS OF THE BOTTOM RELIEF FOR TECHNOLOGIES RIS

Science and technology achievements in the 21st century have qualitatively changed the traditional methods and techniques of Earth's surface research. Nowadays, remote methods have been used widely, when an observer or a measuring device is located at a certain distance from the study object in order to increase the observation area by several times. These materials can expand horizons of researchers, lead to increasing the flow of valuable information about already known objects and phenomena of the Earth.In presented research, there are some explanations about mechanisms of using natural processes to make forecast of changes in bottom topography in shallow water under navigation conditions. The key factor is the development of programs that can track changes in natural processes with displaying and fixation on electronic devices. Any research should preferably be carried out considering changes of the object over time and under the influence of various factors simultaneously and dynamically. In the article dynamic processes are divided into "significant" and "insignificant". This dependence is determined by the scale of space and time, where and when they occur. The concept of "scale factor" is introduced in order to determine significance of dynamic processes influence during research. Presented in the research dynamic map modelling method enables to make a forecast of siltation of the sea / river bottom for a given period of time. After comparing the forecast with the actual result, you can make corrections of the selected function, i.e. constantly improving the model. As a result of the research, we came to the following conclusions: 1. The “scale factor” should be entered in dynamic navigation map research and compilation with using different-scale data of the water surface and bottom topography; 2. It is recommended to enter a dynamic component into the information block of the navigation cartographic systems ECDIS and Inland ECDIS, allowing the skipper to see the position of the vessel, considering the wave height relative to the bottom in real time; 3. Above methods of parallel bottom topography transferring are based only on the data of statistical observations with using iterations. These methods usually give proper results on sandy and silty soils, where the relief has distinct wave-like forms, as well as relatively often repeated external influences with following the general main direction.

Educational and methodological support of the future mechanical engineering specialists training for the labour protection professional activity

The article is devoted to the substantiation of the directions of improving the educational and methodical support of the future mechanical engineering specialists’ training for labour protection professional activity. The aim of the article is to identify areas for improving the educational and methodological support of the future mechanical engineering specialists’ training for labour protection professional activity. The author uses such research methods as analysis of scientific literature, generalization, comparison, systematization, abstraction and methods of mathematical statistics. The benefit of the study is that the ways of improving the educational and methodological support of labour protection disciplines and its structure are defined: the target block (contains the purpose and tasks of a discipline study), the normative block (contains information about the number of credits in the context of classroom and independent work, content modules, structural and logical place of a discipline in the educational training of specialists, etc.), the information block (contains training material in a modular structure), the methodical block (contains the characteristics of forms, methods and tools that provide future mechanical engineering specialists by the labour protection competencies’ forming), the control unit (contains materials for determining the level of labour protection competence) and the resource unit. Moreover the directions of improving teaching labour protection disciplines are defined and reflected in the educational and methodological support of the future mechanical engineering specialists’ training for labour protection professional activity, they are: motivation provision, individual tasks definition, activation of students' educational activity; and the peculiarities of educational and methodological support of the future mechanical engineering specialists’ training for labour protection professional activity are characterized.