Results 71 to 80 of about 350,639 (185)

Electric and hybrid vehicle system R/D [PDF]

The work being done to characterize the level of current propulsion technology through component testing is described. Important interactions between the battery and the propulsion system will be discussed.
Schwartz, H. J.
core   +1 more source

Development of an Ultralight with a Ducted Fan

Acta Polytechnica, 2012
This paper introduces the UL-39 project, an ultralight aircraft with a ducted fan, and some of the problems that have arisen in the course of its development. Several problems with the design of a non-traditional aircraft of this kind are mentioned, e.g.
Jiří Brabec, Martin Helmich
doaj  

Inertial measurement unit-based real-time feedback gait immediately changes gait parameters in older inpatients: a pilot study

Frontiers in Physiology
The effect of gait feedback training for older people remains unclear, and such training methods have not been adapted in clinical settings. This study aimed to examine whether inertial measurement unit (IMU)-based real-time feedback gait for older ...
Takasuke Miyazaki, Ryoji Kiyama, Yasufumi Takeshita, Yasufumi Takeshita, Daichi Shimose, Daichi Shimose, Sota Araki, Hisanori Matsuura, Yuki Uto, Shobu Nakashima, Yuki Nakai, Yuki Nakai, Masayuki Kawada   +12 more
doaj   +1 more source

Manned flying systems /mfs/ cryogenic engine [PDF]

Comparison of performance of cryogenic propulsion system with earth storable propulsion system for manned flying ...
Bhalla, L. M., Tatom, F. B.
core   +1 more source

Optical‐Propulsion Metastructures

Advanced Materials
AbstractPulsed laser micropropulsion (PLMP) offers a promising avenue for miniature space craft, yet conventional propellants face challenges in balancing efficiency and stability. An optical‐propulsion metastructure strategy using metal‐organic frameworks (MOFs) is presented to generate graphene‐metal metastructures (GMM), specifically GMM‐(HKUST‐1 ...
Senlin Rao, Wendi Yi, Haoqing Jiang, Shizhuo Zhang, Junchao Yi, Gary J. Cheng   +5 more
openaire   +2 more sources

Space propulsion systems. Present performance limits and application and development trends [PDF]

Typical spaceflight programs and their propulsion requirements as a comparison for possible propulsion systems are summarized. Chemical propulsion systems, solar, nuclear, or even laser propelled rockets with electrical or direct thermal fuel ...
Buehler, R. D., Lo, R. E.
core   +1 more source

Mars Ascent Vehicle Hybrid Propulsion Configuration [PDF]

As part of a Mars Sample Return (MSR) campaign, two Mars Ascent Vehicle (MAV) configurations have been designed in parallel. Each ascent vehicle configuration has a different propulsion system which ultimately leads to two unique vehicle designs. As part
Schnell, Andrew, Yaghoubi, Darius
core   +1 more source

Janus droplet as a catalytic micromotor

, 2015
Self-propulsion of a Janus droplet in a solution of surfactant, which reacts on a half of a drop surface, is studied theoretically. The droplet acts as a catalytic motor creating a concentration gradient, which generates its surface-tension-driven motion;
Shklyaev, Sergey
core   +1 more source

Beam Space Propulsion

Space 2006, 2006
PurposeThe author's aim is to offer a revolutionary method – the non‐rocket transfer of energy and thrust into Space with distances of millions of kilometers.Design/methodology/approachThe author develops the theory and makes the computations.FindingsThe method is more efficient than transmission of energy by high‐frequency waves.Practical ...
openaire   +2 more sources

Electric Machine Design and Integration for an Electric Propulsion System in Medium-Altitude Long-Endurance Unmanned Aerial Vehicles

Applied Sciences
Unmanned Aerial Vehicles (UAVs) are increasingly used in both civilian and military applications around the world. There are several types of UAVs with classifications according to several quantities.
Emre Kurt, Ahmet Yigit Arabul, Fatma Keskin Arabul, Ibrahim Senol   +3 more
doaj   +1 more source