Submitted for the DFD10 Meeting of The American Physical Society “Corkscrew” vs. “tank-treading” propulsion of spirochetes. ALEXANDER LESHANSKY, Department of Chemical Engineering, Technion-IIT, Haifa, Israel, ODED KENNETH, Physics Department, Technion-IIT, Haifa, Israel — We consider the potential mechanism of spirochete propulsion driven by twirling of the outer cell surface coupled to counte...

Electric propulsion thrusters are replacing small chemical thrusters used for spacecraft control and orbital maneuvers. These thrusters use a variety of mechanisms to convert electrical power into thrust and in general provide superior specific impulse in comparison to chemical systems. Electric propulsion has been under development for the last fifty years, and almost all thrusters are designe...

(les Enjeux de la propulsion et de l'energetique a l'aube du 2P me siecle) (les Enjeux de la propulsion et de l'energetique a l'aube du 2P me siecle)

the repetitious nature of propelling a wheelchair has been associated with the high incidence of injury among manual wheelchair users (mwus), mainly in the shoulder, elbow and wrist. recent literature has found a link between handrim biomechanics and risk of injury to the upper extremity. the valid measurement of three‑dimensional net joint forces and torques, however, can lead to a better unde...

Background/Objective: The high demand on the upper limbs during manual wheelchair (WC) use contributes to a high prevalence of shoulder pathology in people with spinal cord injury (SCI). Leveractivated (LEVER) WCs have been presented as a less demanding alternative mode of manual WC propulsion. The objective of this study was to evaluate the shoulder muscle electromyographic activity and propul...

John R. Brophy , Jet Propulsion Laboratory, Caltech Louis Friedman ,Executive Director Emeritus, The Planetary Society Nathan J. Strange, Jet Propulsion Laboratory, Caltech Thomas A. Prince . Director, Keck Institute for Space Studies, Caltech Damon Landau, Jet Propulsion Laboratory, Caltech Thomas Jones . Florida Institute for Human and Machine Cognition Russell Schweickart , B612 Foundation C...

Electric space propulsion is a technology which employed on continuously increasing number of spacecrafts. While the current focus their application area telecommunication satellites and exploration missions, several new ideas are now discussed that go even further apply thruster plume particle flow for transferring momentum to targets such as debris objects or asteroids. In these potential sce...

Perchlorate anion (ClO4-) has been found in drinking water supplies throughout the southwestern United States. It is primarily associated with releases of ammonium perchlorate by defense contractors, military operations, and aerospace programs. Ammonium perchlorate is used as a solid oxidant in missile and rocket propulsion systems. Traces of perchlorate are found in Chile saltpeter, but the us...

The surface morphology of icy moons is affected by several processes implicating exchanges between their subsurfaces and atmospheres (if any). The possible exchange of material between the subsurface and the surface is mainly determined by the mechanical properties of the lithosphere, which isolates the deep, warm and ductile ice material G. Tobie ( ) Laboratoire de Planétologie et Géodynamique...