Results 31 to 40 of about 3,690 (262)

REFINED MODEL OF THE OPTICAL SYSTEM FOR SPACE MINI-VEHICLES WITH LASER PROPULSION [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2015
Simulation results for on-board optical system of a space mini-vehicle with laser propulsion are presented. This system gives the possibility for receiving theremote laser radiation power independently of a system telescope mutual orientation to the ...
M. S. Egorov, Y. A. Rezunkov
doaj   +1 more source

Research on Key Techniques of the Verification and Testing System for Spacecraft Propulsion

open access: yesMATEC Web of Conferences, 2018
Electric propulsion is an important technology in the future space missions. The verification and testing system is mainly used for the manufacturers to fully understand the propulsion behavior in the most diverse conditions, and to indentify and ...
Junwei Wang   +5 more
doaj   +1 more source

Research on the effects of complex terrain on the hydrodynamic performance of a deep-sea fishlike exploring and sampling robot moving near the sea bottom

open access: yesFrontiers in Marine Science, 2023
Deep-sea exploring and sampling technologies have become frontier topics. Generally, the movable exploring mode near the seabed with low disturbance is an important way to improve the measurement accuracy and expand the measurement range.
Gang Xue   +9 more
doaj   +1 more source

Thirty percent conversion efficiency from radiofrequency power to thrust energy in a magnetic nozzle plasma thruster

open access: yesScientific Reports, 2022
Innovations for terrestrial transportation technologies, e.g., cars, aircraft, and so on, have driven historical industries so far, and a similar breakthrough is now occurring in space owing to the successful development of electric propulsion devices ...
Kazunori Takahashi
doaj   +1 more source

Reviewing the state of biosensors and lab-on-a- chip technologies: opportunities for extreme environments and space exploration

open access: yesFrontiers in Microbiology, 2023
The space race is entering a new era of exploration, in which the number of robotic and human missions to various places in our solar system is rapidly increasing.
Stefano Cinti   +22 more
doaj   +1 more source

Electrically powered ion acceleratot with contact ionixation for perspertive electrically powered thrusters

open access: yesSt. Petersburg Polytechnical University Journal: Physics and Mathematics, 2020
A number of characteristics of ionic and ion-plasma accelerators laboratory samples designed for electrically powered spacecraft propulsion were investigated in the experimental research.
Tsybin Oleg   +6 more
doaj   +1 more source

An Integrated RF Power Delivery and Plasma Micro-Thruster System for Nano-Satellites

open access: yesFrontiers in Physics, 2018
Progress in satellite technologies is ongoing and eventually finds applications back on Earth. Electric propulsion systems have been proven effective on large scale satellites (NASA DAWN) with better propellant efficiency than chemical or cold gas ...
Wei Liang   +7 more
doaj   +1 more source

The Application of Artificial Intelligent Algorithms in Electric Propulsion [PDF]

open access: yesHangkong bingqi
Electric propulsion technology has garnered significant attention due to its much higher specific impulse compared to traditional chemical propulsion. Currently, many mature on-orbit electric propulsion products have been developed worldwide.
Tian Bin, An Bingchen, Xie Kan, Yang Sulan
doaj   +1 more source

Design of Novel Laser Crosslink Systems Using Nanosatellites in Formation Flying: The VISION

open access: yesAerospace, 2022
With growth in data volume from space missions, interest in laser communications has increased, owing to their importance for high-speed data transfer in the commercial and defense fields, spaceborne remote sensing, and surveillance.
Geuk-Nam Kim   +10 more
doaj   +1 more source

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

open access: yesMolecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung   +17 more
wiley   +1 more source

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