This research aimed to address two main goals in the development of a rotary magnetorheological fluid (MRF) brake: (1) design of a compact and powerful brake and (2) low friction sealing technique to reduce the off-state braking torque and prevent the fluid from leaking.
"We know that friction is a very powerful tool to deter people from taking things that are meant to be private and sharing them," Mr. Fertik said.
To start with it seems there was friction between Patten and his powerful and well-entrenched director general Mark Thompson.
The subtext of the country's political crisis is an ailing king and disagreements about the future of the monarchy, friction between opposition politicians and a powerful influential military and, not least, an ailing economy.
As a complement to experiments, molecular dynamics (MD) simulation has been demonstrated to be one powerful tool to investigate the atomic scale phenomena of friction and wear [10 20].
The platform beneath the cargo container I am in is being buoyed up and moved along by powerful electromagnets, allowing the train to move with low friction and no moving parts.
Bar soap will provide additional friction, but liquid soap may be more powerful.
The new rail will use magnetic levitation, which uses powerful magnets to elevate the train above the track, reducing friction and increasing speed.
That friction prompted a visit by Pakistan's most powerful Islamist politicians to assure Beijing that they would not stoke Islamist insurgency in China.
That decision is still a source of friction between the two Californians, who are both powerful and wealthy women, and yet in other ways as different as the districts they represent.
