Author
Volodymyr Kotegov
Recent research
- Engineering & TechnologyOpen access
The invention relates to an autonomous flameless thermochemical heating boiler operating on composite metal fuel briquettes (iron–aluminium–calcium oxide) with a unit mass of approximately 3 kg. The briquettes are protected by a thin paraffin- or polymer-based coating that preven...
- Engineering & TechnologyOpen access
Free-space optical links in satellite constellations deliver high bandwidth but are vulnerable to short-duration blockages caused by orbital debris, atmospheric turbulence, cloud cells and pointing jitter. Conventional link-level retransmission (ARQ) fails on long inter-satellite...
- Engineering & TechnologyOpen access
Round-trip light-time delays between Earth and Mars routinely reach 20–40 minutes. Under these conditions conventional transactional databases and consensus protocols either lock up or time out. This paper describes a practical architecture that avoids the problem by running iden...
- Materials & EnergyOpen access
Reusable launch vehicles and hypersonic re-entry vehicles experience surface temperatures that routinely exceed 2000 °C on leading edges and nose tips. Conventional ultra-high-temperature ceramic (UHTC) coatings based on hafnium or zirconium diboride offer high melting points but...
- Engineering & TechnologyOpen access
Junction-Stabilized Graphene Aerogels for Cryogenic Insulation and Lightweight Radiation Shielding
Long-duration deep-space missions and reusable cryogenic stages require insulation that remains dimensionally stable at liquid-hydrogen temperatures, adds very little mass, and provides at least modest attenuation of ionizing radiation. Conventional polymer foams become brittle a...
- Engineering & TechnologyOpen access
Round-trip light-time delays between Earth and Mars routinely reach 20–40 minutes. Under these conditions conventional transactional databases and consensus protocols either lock up or time out. This paper describes a practical architecture that avoids the problem by running iden...
- Engineering & TechnologyOpen access
High-resolution Earth-observation satellites in low Earth orbit generate large raw data volumes that require substantial onboard computing for feature extraction, compression and filtering. Performing this work during the sunlit portion of the orbit adds heat and power load at th...
- Engineering & TechnologyOpen access
High-resolution Earth-observation satellites in low Earth orbit generate large raw data volumes that require substantial onboard computing for feature extraction, compression and filtering. Performing this work during the sunlit portion of the orbit adds heat and power load at th...
- Engineering & TechnologyOpen access
The invention relates to an autonomous flameless thermochemical heating boiler operating on composite metal fuel briquettes (iron–aluminium–calcium oxide) with a unit mass of approximately 3 kg. The briquettes are protected by a thin paraffin- or polymer-based coating that preven...