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Your search keyword '"Chterev, Konstantin"' showing total 13 results
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13 results on '"Chterev, Konstantin"'

1. Power Line Communication for Long-Distance Underwater Applications

Author

Chterev, Konstantin, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Yang, Xin-She, editor, Sherratt, R. Simon, editor, Dey, Nilanjan, editor, and Joshi, Amit, editor

Published
2024
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2. Lightweight Network Architecture for Tethered Underwater Vehicles

Author

Chterev, Konstantin, Nikolov, Nikola, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Yang, Xin-She, editor, Sherratt, R. Simon, editor, Dey, Nilanjan, editor, and Joshi, Amit, editor

Published
2024
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8. Social isolation in space: An investigation of LUNARK, the first human mission in an Arctic Moon analog habitat

Author

Riva, P, Rusconi, P, Pancani, L, Chterev, K, Riva, Paolo, Rusconi, Patrice, Pancani, Luca, Chterev, Konstantin, Riva, P, Rusconi, P, Pancani, L, Chterev, K, Riva, Paolo, Rusconi, Patrice, Pancani, Luca, and Chterev, Konstantin

Abstract

Research to address the technical challenges of human missions into space is growing. Knowledge about the social-psychological aspects of individuals’ experiences of confinement within habitats in space missions or extreme environments is also rapidly expanding. Social isolation is among one of the best-known risk factors in these environments. This study focuses on the relationship between time spent in specific activities (e.g., talking about personal matters) and the social-psychological effects of social isolation and confinement as a part of the LUNARK project, which was aimed at building and testing the first Moon analog habitat. Two space architects took part in a 61-day mission in Northern Greenland to simulate human life conditions in the habitat as a prototype of a human settlement on the Moon. The two crew members independently filled out a time-based diary with self-report measures on their daily activities and negative emotions, feelings of loneliness, resignation, desire for social contact, and time perception. First, our results showed that, for either space architect, desire for social contact increased over time, whereas feelings of resignation did not. Moreover, the protective role of specific daily activities emerged. Talking about personal matters and leisure time were associated with a decrease in resignation, whereas talking about personal topics and physical exercising increased the desire for social contact. Finally, engaging in leisure activities increased the perceived speed of time. We discussed these results referring to research on the consequences of long-term social isolation in extreme human expeditions and social psychological models of social isolation.

Published
2022

10. Remotely Operated Vehicle for a continental shelf research

Author

Chterev, Konstantin, Доц. д-р Димитър Петков Димитров, and Associate Professor Dimitar Petkov Dimitrov, PhD

Abstract

This thesis is about the overall architecture and the main components of an observational class Remotely Operated Vehicle (ROV). The research has focused on modelling the ROV as a distributed network system, control protocols and data transfer. In addition, based on the theoretical research, a working ROV has been designed, built, tested and used in several research projects in the Black Sea region. This thesis fills the gap in the research in various areas. First, it introduces a concept of a ROV, based on the 7 layer OSI model. The model takes into account only the minimum required components - ROV control console (RCC), tether, thrusters and camera, but any other auxiliary equipment could be easily included. Second, a new protocol for minimising the control lag is introduced and a new method for the video stream transfer is implemented. The model is analysed for bandwidth and verified measuring the real network traffic in the built ROV. Third, a ROV system power supply is designed and created. It is analysed for stability and tested in the real operation. Fourth, the thruster system is created and optimised for the specific needs of the ROV. The thrusters are designed, built and tested for efficiency. Fifth, the camera-lights system is analysed for optimum colour temperature. The most suitable LEDs for ROV use are found. Finally the overall ROV behaviour, as observed in the field test, is analysed. The methodology and the results are presented in the rel Този дисертационен труд е относно цялостната архитектура и основните компоненти на система Подводен Апарат с Дистанционно Управление (ПАДУ). Изследването е фокусирано върху подсистемите за захранване, задвижване и комуникации. Изследван е също модел на ПАДУ като дистрибутирана информационна мрежа, с иновативен команден протокол. ПАДУ система е изработена на базата резултатите от теоретичното изследване и реално използвана в няколко проекта в акваторията на Черно Море. Този труд запълва празнина в няколко области ня изследванията. Първо, предложена е мрежова концепция на ПАДУ, базирана на 7 слойния OSI модел. Второ, иновативен протокол е създаден с цел минимизиране на закъснението в управлението и синхронизация между отделните компоненти. Моделът е изследван за изисквания към пропусквателна способност на мрежовите канали и проверен на практика с реално работеща ПАДУ система. Трето, създаден е модел на захранването на ПАДУ, което се оказва нетривиален проблем. То е изследвано за стабилност, изработено и тествано в лабораторен и реален проект. Четвърто, системата за задвижване е изследвана и оптимизирана за конкретните цели на ПАДУ. Тръстерите са моделирани, изработени и тествани за ефективност. Ефективността на отделните компоненти е измерена и записана. Поведението на цялата ПАДУ система е наблюдавана в реален експеримент и анализирана. Методологията на изследванията е дадена в съответните секции.

Published
2020

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