Sentences with phrase «friction surface of»

The ball is the top (head) of the thighbone (femur), which is coated with a smooth, low friction surface of cartilage.

Not exact matches

«A lot of the discussion gets centred on the big suppliers and that's where the friction exists, but under the surface there are some good news stories too.»

The mesh design of these elbow and knee pads means they are breathable, absorb moisture and provide your crawling baby with comfort, grip and protection from harsh surfaces and surface friction.

We are learning that stability is a common feature of large - scale atmospheric systems in the giant planets: with no solid surface underlying the gas, there is no friction to dissipate atmospheric motions.

When these granular particles are left on a vibrating solid surface, they are not only subject to random vibrations, they are also under the spell of solid friction forces, like the force a dry floor would exert on a brick in contact with that floor.

«Uncovering the secrets of friction on graphene: Sliding on flexible graphene surfaces has been uncharted territory until now.»

Researchers had previously found that while one layer of graphene on a surface reduces friction, having a few more was even better.

At the top of the eyewall, water condenses; as the resulting drops fall back down to the ocean surface they lose power through friction with the surrounding air.

All scraped - surface heat exchangers bump into a physical limit: As the goo gets more viscous, and you continue to dash it at 200 rotations per minute (don't try that speed at home), you reach a point at which friction is adding as much heat as the wall of the freezer is removing.

When this part of the tire surface comes into contact with the ground, the friction between those two surfaces ultimately produces an electrical charge - a type of contact electrification known as the triboelectric effect.

All these applications come out of the specific properties of quasicrystals, that they are poor conductors of heat, they have very low - energy surfaces, they have low friction and they have low adhesion properties.

«Understanding the wetting of micro-textured surfaces can help give them new functionalities: New theoretical model explains experimental measurement of the friction of liquid droplets sliding on micro-structured surfaces.»

In a paper published in EPJ E, the authors found that under the same solid fraction, friction on surfaces with a structure made up of micro-holes is much higher than that on surfaces patterned with an array of pillars.

This conclusion was experimentally validated by actively sliding a water droplet on solid surfaces with micro-holes and micro-pillars of various sizes while simultaneously measuring the resultant sliding friction forces.

This forms a so - called transfer film between the low friction coating and the object through which surfaces can slide with the minimum of friction.

Vuletic then engineered a second surface: an ion crystal — essentially, a grid of charged atoms — in order to study friction's effects, atom by atom.

Using their technique, the researchers are able to directly observe individual atoms at the interface of two surfaces and manipulate their arrangement, tuning the amount of friction between the surfaces.

By tuning the spacing of the ion crystal surface above to mismatch the bottom corrugated surface, friction disappears.

By changing the spacing of atoms on one surface, they observed a point at which friction disappears.

Over several months, the spacecraft will slowly circularize its orbit, dipping in and out of the atmosphere, and using that friction to reach a circular orbit 400 kilometers above the surface.

The group continued to stretch and squeeze the ion crystal to manipulate the arrangement of atoms, and discovered that if the atom spacing is mismatched from that of the optical lattice, friction between the two surfaces vanishes.

These structures and surfaces not only divert and channel the water, but provide different levels of friction that must be modeled as well.

Interestingly, the research team has shown that the friction acting at a material surface is influenced by the structure of the sub-surface layers.

«As the strength of the van der Waals forces depends on the composition of a material to depths of up to 100 nanometres, carefully designing the layer structure at the surface of a material can reduce friction.

When two objects rub together, there is always friction, and the surfaces of the two objects determine the amount that is generated.

This friction normally allows the car to «grip» the road — keeping the tires in contact with the relatively rough road surface, and the driver of the car in control.

Jacobs» team precisely measured the friction between silicon dioxide (SiO2) layers of different thicknesses and the 200 - nm tip of an atomic force microscopy probe by carefully scanning the tip across the wafer surface.

In understanding friction, the concept of surface roughness plays a crucial role.

«Using friction experiments we have shown that the extent of frictional melting depends on the composition of the rock and magma, which determines how fast or slow the magma travels to the surface during the eruption.»

«Every material interacts with the world through its surface,» Carpick said, «so understanding and manipulating surface properties — friction, adhesion, interactions with water, catalysis — are major, ongoing areas of scientific research.

By showing that (a) there are no common physical laws between the warming phenomenon in glass houses and the fictitious atmospheric greenhouse effects, (b) there are no calculations to determine an average surface temperature of a planet, (c) the frequently mentioned difference of 33 C is a meaningless number calculated wrongly, (d) the formulas of cavity radiation are used inappropriately, (e) the assumption of a radiative balance is unphysical, (f) thermal conductivity and friction must not be set to zero, the atmospheric greenhouse conjecture is falsified

They cut friction between the ski and the surface of the snow.

These oceans were formed by tidal heating, that is, warming of the ice caused by friction between the surface ice and the core as a result of the gravitational interaction between the planet and the moon.

But this assumes a high degree of friction between the lower atmosphere and a craggy, rocky surface and efficient high - altitude air flow.

the wearing away of a surface through grinding or friction; the gradual reduction in number or strength resulting from stress

Friction generally causes a heating, which can damage the surface of the materials rubbing against one another.

Because runners do the same movement over and over again, too much of it without too introducing variations in distance or speed can be the cause of excessive friction between the cartilages surrounding the knee, resulting in an irritation of the soft issues within as well as the posterior surface of the knee cap.

This will get rid of any moisture, provide a stronger grip and increase surface friction by filling up all the cracks on the bar and on your hands.

This is especially true when utilizing single handed or double steel club exercises, since each club must be controlled through the friction created against the relatively small surface area of a single hand.

A study published in Journal of Cosmetic Chemists found that rice water applied to hair can reduce surface friction and improve hair elasticity.

It has been suggested that the repeating knee movements lead to inflammation of the distal portion of the iliotibial band by way of friction between the surfaces (see reviews by Khaund and Flynn, 2005; Fredericson and Wolf, 2005).

When you take away all of the friction, like when I'm on this sliding surface, my body is going to resolve all that rotation and I'm going to get to a depth where I'm just going to find out where I no longer need to apply any rotational forces to the ground because this has shown me where that position is.

Encouraging mathematical thinking, the kit allows students to study the effects of friction, types of surface and plane angles on the speed of the «bowling» balls in a fun and engaging way.

A new technique used on gear tooth surfaces makes for a lower coefficient of friction when the gears engage.

Although it always helps to set the car straight before dropping the anchors, the computers have learned to cope very well with sudden changes like weight transfer, changes of direction, marginal adhesion, and split - friction surfaces.

Although some surfaces have the friction coefficient of a banana skin, the amazing winter Michelins, attentive suspension, and astute electronic helpers bring about a surprise - free balance.

On surfaces with a split coefficient of friction - patchy ice or standing water, for instance - DSC and Active Steering will compensate for the steering tug you feel as one set of tires grips harder than the other, which could be a lifesaver.

A low - friction surface will give the 320d a chance to show its ultimate abilities much more freely and tip the power / grip ratio in the favour of the engine and the driver...

Thanks to improved traction and stronger lateral grip especially on low - friction surfaces, it allows you to carry more momentum out of corners.»

The above quote means that your goal as the driver is to attempt to ensure that the clutch is spending more time in a static friction mode (i.e., where the frictional surfaces of the clutch are turning at the same speed, pressed tightly together) rather than a kinetic friction mode (i.e., where the frictional surfaces are turning at different speeds and are slipping past each other).