The relation of habitual knuckle cracking to osteoarthrosis with functional impairment of the hand has long been considered an old wives' tale without experimental support. The mechanical sequelae of knuckle cracking have been shown to produce the rapid release of energy in the form of sudden vibratory energy, much like the forces responsible for the destruction of hydraulic blades and ship pro...

Quality control in the orthopedical diagnostics according to DIN EN ISO 9000 ff requires methods of nondestructive process control, which do not harm the patient neither by radiation nor by invasive examinations. To gain an improvement of health economy quality controlled and nondestructive measurements have to be introduced in the diagnostics and the therapy of human joints and bones. There is...

The construction of coastal ports requires the use materials that meet demands marine environment, to prevent underwater concrete structures from cracking and spalling easily; basalt fiber is used delay expansion formation cracks. This research studies behavior for prefabricated piles with Portland Cement Type I fibers added in 0.1%, 0.3% 0.6%; results indicate suitable concrete, slump decrease...

Dealumination of MCM-68 zeolite with MSE topology enhanced the selectivity to propylene (45-50%) and durability to coke formation during hexane cracking, regardless of the reaction temperature, which is attributed to the control of the position and density of acid sites originating from the framework Al atoms.

This article proposes a formula to determine the required amount of ice partially replace water in concrete mix control initial temperature and reduce possible cracking. The was created based on principle energy balance heat transfer process. At same time, obtained results were compared with other methods. Besides, an example calculation for block during construction performed. maximum differen...