Персона: Лещев, Сергей Валерьевич
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Thermal stability of tantalum nitride based thin film resistors
© 2019 Published under licence by IOP Publishing Ltd. Tantalum nitride thin films were deposited on Al2O3 substrates by the dc-magnetron sputtering technique. The nitrogen content in the argon/nitrogen flow varied from 5 to 50%. Structural properties were studied using X-ray diffraction. The ratio of Ar:N2 was 4:1; the ratio of Ta:N became 1:1. Sheet resistance depends on thickness and is in the range of 20 - 80 Ω/□ due to thickness 100 - 50 nm. The TaN films deposited at a nitrogen/argon ratio of 20% show the thermal stability of the resistance in the 25-400°C temperature range. Sheet resistance degradation was ∼ 5%. The TCR value was determined in the range of 25 - 300 C and was equal to - 21 ppm/K.
Artificial Intelligence Limitations: Blockchain Trust and Communication Transparency
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.Natural and artificial systems and agents overcome communication limitations in different ways. It is necessary to develop scenarios for their interaction (for example, in hybrid environments and Industry 4.0), identifying the most risky strategic lines of mutual danger and discovering areas of transparent communication. In this vein, the problem of communication transparency can be understood as a problem of trust. The article discusses the concept of transparency (security, reliability) of communication in the social and technological spheres. This problem has been studied in the specific contexts of artificial intelligence and blockchain. It has been methodologically shown that the combination of these two technologies can significantly expand the capabilities of both. Artificial intelligence is generating more efficient and secure blockchain protocols as a network, as well as private implementations of blockchain solutions such as smart contracts. The probable ecological optimization of the blockchain by artificial intelligence due to the detection of ineffective algorithmic solutions or used software and hardware resources is also important. In turn, blockchain technology provides artificial intelligence with an environment for unfolding and building a transparent history (logging, precedency, patterns, templates). The network nature of the blockchain contributes, on the one hand, to the globality of solutions, the distribution of information, and, on the other hand, to the locality and privacy of owner interests.
Temperature influence on process of Ti/Al/Ni/Au contact formation to heterostructure AlGaN/GaN
© 2019 Published under licence by IOP Publishing Ltd. This paper is dedicated to the experimental investigation of Ohmic contacts to the n+-doped region of the AlGaN/GaN transistor heterostructure based on Ti/Al/Ni/Au metallization. The Al-Ti-N system has been assessed on the basis of available thermodynamic descriptions for binary subsystems. The effect of annealing temperature on the specific resistance of Ohmic contact was studied.
Poster: Influence of the Direction of Movement of Earth-Moving and Construction Machines on the Stability of Remote Control Data Transmission via Mobile Communication Channels
© 2019, Springer International Publishing AG, part of Springer Nature. In the article authors give research results of the influence of the movement direction of earth-moving machines on the stability of the remote control data transmission through mobile communication channels. The authors carried out an extensive analysis of the state of research in this and related fields. If movement direction of earth-moving and construction machines changes with respect to the nearest radio transmitting tower of the mobile communication base station, theoretically an instability in data transmission of data over mobile communication channels will appear. To establish the admissibility of such instability, experiments were performed in real conditions, the results of which are presented in the article.
From Artificial Intelligence to Dissipative Sociotechnical Rationality: Cyberphysical and Sociocultural Matrices of the Digital Age
© 2021, Springer Nature Switzerland AG.Artificial-intelligence and converging technologies currently setting global post-industrial (economic, cultural, social, and manufacturing) trends, such as the Internet of things, penetrating computing, physical-digital communication, smart medicine and smart education replacing step by step the traditional forms of communications, logistics, management, data logging, and automation.