Element 34 in our International Year of the Periodic Table series is selenium. Named after the moon, selenium compounds pop up in shampoos and are also partly responsible for the awful smell of skunk spray. If you use a shampoo that boasts of anti-dandruff properties, then it might well contain selenium disulfide. This compound has …
Various solutions for the design of oil-free bearings are discussed in the literature. Adding hydrodynamic preload to the foil bearings by profiling the inner bore of the bearing is one of the most frequently investigated methods for improving the bearing stability and damping character of the entire system. However, this approach leads to a reduced …
Various solutions for the design of oil-free bearings are discussed in the literature. Adding hydrodynamic preload to the foil bearings by profiling the inner bore of the bearing is one of the most frequently investigated methods for improving the bearing stability and damping character of the entire system. However, this approach leads to a reduced …
Element 33 in our International Year of the Periodic Table series is arsenic. Well known for its use as a poison, compounds of arsenic are also used to treat wood, while other arsenic-containing substances were previously used in poultry feed. Arsenic’s best-known use is as a poison. Most often arsenic trioxide was used for poisoning, …
Element 32 in our International Year of the Periodic Table series is germanium. Found in some camera lenses and guitar effects pedals, it’s also present in some LCD TVs. Germanium oxide has a high index of refraction, meaning light travels through it particularly fast. This gives it applications in wide angle lenses for cameras and microscope …
Element 32 in our International Year of the Periodic Table series is germanium. Found in some camera lenses and guitar effects pedals, it’s also present in some LCD TVs. Germanium oxide has a high index of refraction, meaning light travels through it particularly fast. This gives it applications in wide angle lenses for cameras and microscope …
As you might have picked up from previous pregnancy-related posts on the site (here and here), my wife and I have been expecting our first child. During labour and birth, terms like ‘epidural’, ‘gas and air’ and ‘induction of labour’ get thrown around, but what specific drugs do these involve? How do they work? What …
Element 31 in our International Year of the Periodic Table series is gallium. Gallium is a low melting point metal; combined with arsenic it is used in some types of solar cells, and it’s also a key component of the lasers that read from Blu-ray discs. Though it’s solid at room temperature, gallium’s melting point …
Recent experiments have shown that the elastic deformation behaviors of a polymeric material are consistent with the Cosserat elasticity under nonuniform deformation at a millimeter scale. Thus, an elastohydrodynamic lubrication model in the framework of the Cosserat continuum theory is proposed to explore the lubrication performance that deviates from the classical elastohydrodynamic lubrication theory for …
Cu-based brake pads applied in high-speed railway trains containing Ni-coated graphite flake and uncoated graphite flake were fabricated by powder metallurgy. The braking properties of the brake pads were investigated by a scaled down testing apparatus with the pad-on-disk configuration under various braking speeds and braking pressures. Compared with the brake pads containing uncoated graphite …
