Results 271 to 280 of about 21,441 (307)

Influences analysis of geometrical parameters on propulsive force of LSRM

10th International Multi-Conferences on Systems, Signals & Devices 2013 (SSD13), 2013
This paper presents the optimal design of a double stator linear switched reluctance motor (LSRM). For reducing the mass of the LSRM and increasing the generated propulsive force, we present a sensitivity analysis of the effect of geometrical parameters on the produced force of the LSRM.
El Manaa Barhoumi, Mansour Hajji, Boujemaa Ben Salah   +2 more
openaire   +1 more source

Intentional on-line control of propulsive forces in human gait

Experimental Brain Research, 1997
In locomotion, the capability to control and modulate intentionally the propulsive forces is fundamental for the adaptation of the body's progression, both in speed and direction. The purpose of this experiment was to determine how human beings can achieve such control on-line.
F, Danion, M, Bonnard, J, Pailhous
openaire   +2 more sources

An autoregressive modeling approach to analyzing wheelchair propulsion forces

Medical Engineering & Physics, 2001
Biomechanical signals collected during wheelchair propulsion are often analyzed by computing averages and/or peak values over several strokes. Due to the complex nature of the signals, this type of analysis may not be specific to identifying factors that may predispose a wheelchair user to joint pain/injury.
A M, Koontz, R A, Cooper, M L, Boninger
openaire   +2 more sources

Body position determines propulsive forces in accelerated running

Journal of Biomechanics, 2010
Rapid accelerations during running are crucial for the performance in a lot of sports. While high propulsive forces are beneficial to forward acceleration, vertical forces have to be small to attain high stride frequencies. However, propulsive and vertical force components cannot be altered independently, because the resultant force vector affects the ...
F, Kugler, L, Janshen
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Generation of Propulsive Forces by Cilia and Flagella

1987
Eukaryotic cilia and flagella are long (5–200 μm), thin (0.2 μm), motile cellular organelles which are used to produce relative motion between a cell and its fluid environment, as observed for free-swimming flagellated protozoa or the mucus currents flowing over the ciliated epithelial surface of the mammalian lung.
Michael E. J. Holwill, Peter Satir
openaire   +1 more source

Propulsive force of Paramecium as revealed by the video centrifuge microscope

Experimental Cell Research, 1989
Using the video centrifuge microscope we constructed, we observed the behavior of Paramecium cells in a solution of graded densities under centrifugal acceleration. Beyond 300g, they not only gather in the zone where the density is closest to theirs, but also orient themselves with their longitudinal axis parallel to the direction of centrifugation ...
K, Kuroda, N, Kamiya
openaire   +2 more sources

Propulsive Force in an Electric Solar Sail

Contributions to Plasma Physics, 2014
AbstractAn electric solar sail (e‐sail) is a promising propellantless propulsion concept for the exploration of the Solar System. An e‐sail consists of an array of bare conductive tethers at very high positive/negative bias, capable of extracting solar‐wind momentum by Coulomb deflection of protons.
openaire   +1 more source

Pushrim forces and joint kinetics during wheelchair propulsion

Archives of Physical Medicine and Rehabilitation, 1996
To investigate pushrim forces and joint kinetics during wheelchair propulsion and to discuss the differences between inexperienced and experienced wheelchair users.Cohort study.Human engineering laboratory at a state university.Four men who use manual wheelchairs for mobility and four nondisabled men who did not have extensive experience pushing a ...
R N, Robertson, M L, Boninger, R A, Cooper, S D, Shimada   +3 more
openaire   +2 more sources

Some contributions to propulsion theory—The Stream Force Theorem and applications to propulsion

The Aeronautical Journal, 1993
SummaryAfter deriving the Stream Force Theorem, it is shown how this simplifies many problems of propulsion theory and makes the mathematics direct and concise. Applications discussed include forces upon ducting systems, intake entry losses, spill drag, mixing losses, errors in measuring intake losses by pitot traverse, and use of measured intake lip ...
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Propulsion Mechanism based on Inertial Force

The Proceedings of Conference of Hokkaido Branch, 2003
Tadao Kagiwada, Hiroyuki Harada, Hiroshi Yoshikawa   +2 more
openaire   +1 more source