Results 31 to 40 of about 32,761 (288)

Examining the stability derivatives of a compound helicopter [PDF]

open access: yes, 2016
Some helicopter manufacturers are exploring the compound helicopter design as it could potentially satisfy the new emerging requirements placed on the next generation of rotorcraft.
Ferguson, Kevin, Thomson, Douglas
core   +1 more source

Performance of Very Small Robotic Fish Equipped with CMOS Camera

open access: yesRobotics, 2015
Underwater robots are often used to investigate marine animals. Ideally, such robots should be in the shape of fish so that they can easily go unnoticed by aquatic animals.
Yang Zhao   +3 more
doaj   +1 more source

Flow Interactions Between Low Aspect Ratio Hydrofoils in In-line and Staggered Arrangements

open access: yesBiomimetics, 2020
Many species of fish gather in dense collectives or schools where there are significant flow interactions from their shed wakes. Commonly, these swimmers shed a classic reverse von Kármán wake, however, schooling eels produce a bifurcated wake topology ...
Melike Kurt   +2 more
doaj   +1 more source

Scaling the propulsive performance of heaving and pitching foils

open access: yes, 2017
Scaling laws for the propulsive performance of rigid foils undergoing oscillatory heaving and pitching motions are presented. Water tunnel experiments on a nominally two-dimensional flow validate the scaling laws, with the scaled data for thrust, power ...
Floryan, Daniel   +3 more
core   +1 more source

Impaired H-Reflex Adaptations Following Slope Walking in Individuals With Post-stroke Hemiparesis [PDF]

open access: yes, 2019
Background and Purpose: Short term adaptations in the Ia afferent-motoneuron pathway, as measured using the H-reflex, in response to altered ground reaction forces (GRFs) applied at the feet during slope walking have been observed in the non-impaired ...
Akoopie, Eric   +5 more
core   +2 more sources

Three-Dimensional Numerical Study of Hydrodynamic Interactions between Pectoral Fins and the Body of Aquatic Organisms

open access: yesBiomimetics
Fish swimming has attracted attention as a locomotion system with excellent propulsive efficiency. They swim by moving their body, fins, and other organs simultaneously, which developed during evolution.
Kotaro Morifusa, Tomohiro Fukui
doaj   +1 more source

Simulation Analysis of the Effect of Trunk Undulation on Swimming Performance in Underwater Dolphin Kick of Human

open access: yesJournal of Biomechanical Science and Engineering, 2009
The objectives of this study were to investigate the effect of trunk undulation on the swimming performance in underwater dolphin kick, and to clarify the ideal trunk undulation form. The reference swimming motion of an elite swimmer was firstly acquired
Motomu NAKASHIMA
doaj   +1 more source

A realistic quasi-physical model of the 100 metre dash [PDF]

open access: yes, 2000
A quasi-physical model (having both physical and mathematical roots) of sprint performances is presented, accounting for the influence of drag modification via wind and altitude variations.
Mureika, J. R.
core   +3 more sources

PARP inhibition and pharmacological ascorbate demonstrate synergy in castration‐resistant prostate cancer

open access: yesMolecular Oncology, EarlyView.
Pharmacologic ascorbate (vitamin C) increases ROS, disrupts cellular metabolism, and induces DNA damage in CRPC cells. These effects sensitize tumors to PARP inhibition, producing synergistic growth suppression with olaparib in vitro and significantly delayed tumor progression in vivo. Pyruvate rescue confirms ROS‐dependent activity.
Nicolas Gordon   +13 more
wiley   +1 more source

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