Results 71 to 80 of about 63,437 (256)

A review of the literature on the issues and roles of E-Learning in UAE higher education [PDF]

, 2019
E-Learning is becoming a popular delivery method across various universities and colleges in UAE as the region is experiencing a rapid growth of e-Learning in higher education.
Abd Hamid, Nor Aziati, Alblooshi, Saeed
core   +1 more source

A cyclic ground test of an ion auxiliary propulsion system: Description and operational considerations [PDF]

The Ion Auxiliary Propulsion System (IAPS) experiment is designed for launch on an Air Force Space Test Program satellite (NASA-TM-78859; AIAA Paper No. 78-647).
Kramer, Edward H., Ling, Jerri S.
core   +1 more source

Effect of Anode Structure on the Plasma Jet Characteristics of Arcjet Thruster

MATEC Web of Conferences, 2015
In order to study the effects of anode geometry on volt-ampere characteristics and plasma jet characteristics of the arcjet thruster, the arcjet thruster flow characteristics were simulated.
Du Zhenzhi, Chen Xiong, Li Yingkun, Zhou Changsheng   +3 more
doaj   +1 more source

Ground correlation investigation of thruster spacecraft interactions to be measured on the IAPS flight test [PDF]

Preliminary ground correlation testing has been conducted with an 8 cm mercury ion thruster and diagnostic instrumentation replicating to a large extent the IAPS flight test hardware, configuration, and electrical grounding/isolation.
Power, J. L.
core   +1 more source

Low thrust monopropellant engine [PDF]

, 1981
The engine has a conventional body and nozzle configuration. The monopropellant fuel is fed into the thruster with dual injection tubes via an injector shell with dual spray jets. The spray jets are positioned generally opposed to each other.
Kuenzly, J. D.
core   +1 more source

Efficiency of Electrodynamic Tether Thrusters

Journal of Spacecraft and Rockets, 2006
The performance efficiency of electrodynamic bare tethers acting as thrusters in low Earth orbit, as gauged by the ratio of the system mass dedicated to thrust over mission impulse, is analyzed and compared to the performance efficiency of electrical thrusters.
SANMARTIN J. R, ESTES R. D, LORENZINI, ENRICO, ELASKAR S. A.   +3 more
openaire   +2 more sources

Simulations and Analyses of the Influence of a Vacuum Back-Pressure Environment on Laser Ablation Thrusters

Aerospace
The study of thruster plume flow fields can yield a series of thruster performance parameters such as thrust effect, spacecraft plume contamination, etc., which is of great significance for thruster development.
Ming Wen, Baosheng Du, Haichao Cui, Jianhui Han   +3 more
doaj   +1 more source

Extended operating range of the 30-cm ion thruster with simplified power processor requirements [PDF]

A two grid 30 cm diameter mercury ion thruster was operated with only six power supplies over the baseline J series thruster power throttle range with negligible impact on thruster performance.
Rawlin, V. K.
core   +1 more source

A novel underwater piezoelectric thruster with one single resonance mode.

Review of Scientific Instruments, 2019
In this paper, a novel underwater piezoelectric thruster with one single resonance mode is proposed. The piezoelectric thruster consists of one piezoelectric transducer and two propellers.
Xinjian Li, Di Chen, Jiamei Jin, Liang Wang   +3 more
semanticscholar   +1 more source

Charge-exchange plasma generated by an ion thruster [PDF]

The charge exchange plasma generated by an ion thruster was investigated experimentally using both 5 cm and 15 cm thrusters. Results are shown for wide ranges of radial distance from the thruster and angle from the beam direction.
Kaufman, H. R.
core   +1 more source