We apply population synthesis techniques to calculate the present day number of two types of white dwarf-main sequence star (WDMS) binaries within the cataclysmic variable 2 to 3 hour period gap. The first are post-common envelope binaries with secondary stars that have masses 0.17 ≤ M2/M⊙ ≤ 0.36 (gPCEBs), such that they will commence mass transfer within the period gap. The second type are sys...

The literature contains some hypotheses regarding the most favorable ground reaction force (GRF) for sprint running and how it might be achieved. This study tested the relevance of these hypotheses to the acceleration phase of a sprint, using GRF impulse as the GRF variable of interest. Thirty-six athletes performed maximal-effort sprints from which video and GRF data were collected at the 16-m...

Metallic gas detected in the β Pictoris circumstellar debris disk raises many questions. The origin of this gas is unclear and its very presence is difficult to explain: many constituents of the gas are expected to be radiatively accelerated outward, yet their motion appears to be consistent with Keplerian rotation out to at least 300 AU. Hydrogen has previously been hypothesized to exist in th...

Safety systems in road vehicles are categorised into two main types: passive and active systems. The antilock braking system (ABS) is an active safety system in road vehicles, which senses the slip value between the tyre and the road and uses these values to determine the optimum braking force. Due to the high non-linearity of the tyre and road interaction, and uncertainties from vehicle dynami...

A flexible pneumatic wrist with spatial position maintenance function is developed in this paper to settle the matter of insufficient flexibility robot and self-braking technology. The made up four artificial muscles a spherical brake parallel, 2 degrees freedom. can realize multidirectional bending adjust damping braking real time as required achieve maintenance. theoretical model angle built ...

Aimed at the safety problem of the locomotive under the dynamic braking condition, analysis the influence of the coupler and buffer system. The coupler reposition methods of the large rotation angle coupler and the small rotation angle coupler under longitudinal coupler press force was compared. The influence of coupler and buffer system to the dynamics performance of locomotive was researched ...

a new anti-lock braking system (abs) for motorcycles is proposed in this study. it functions by processing the speed of the motorcycle tire in contact with the ground relative to the speed of the motorcycle itself and by calculating the slip ratio (λ) of the tire slipping on the ground while braking, and reducing it to a minimum which leads to increased controllability of the motorcycle and red...