Abstract High precision rotary shafts with precise geometrical tolerances are generally mounted a micron level clearance between the gears and casing during operation in industrial applications. Dynamics cyclic loads inevitable most of these applications which has an adverse effect on fatigue life critical parts. Ensuring close dimensional coaxiality machining is highly desirable, as it affects...

Abstract The aim of the paper is to present actual state techniques regarding influence cryogenic cooling in turning and milling process. Processing some materials impossible without tool or processed material. Hard-to-cut are increasingly used industry, so new methods these had be researched. Cryogenic most efficient method cool down turning, cutting tools. There a lot that not affected by low...

Curve walking of crayfish Astacus leptodactylus was investigated by exploiting their optomotor response. The animal walked while spatially fixed on a motor-driven treadmill and turning behaviour was induced by an optical stimulus, a pattern consisting of vertical stripes moving in a horizontal direction. In this open-loop situation, the crayfish maintains the same step frequency for the legs on...

An image processing system was programmed to automatically track and digitize the movement of amebae under phase-contrast microscopy. The amebae moved in a novel chemotaxis chamber designed to provide stable linear attractant gradients in a thin agarose gel. The gradients were established by pumping attractant and buffer solutions through semipermeable hollow fibers embedded in the agarose gel....