A Digital Deformation Vacuum Gauge with an LC-Generator

The design of a sylphon bellows sensor and the basic circuits of an LC-generator and of a microprocessor unit are presented. An analytical pressure–frequency conversion function and a special method of adjusting the sensor ensure an error of less than 0.05%. The dynamic range is up to 10⁵. The instruments developed cover the ranges 10³, 10⁴, and 10⁵ Pa.     

Deformation Effects During Forging of Large Ingots

Metallurgist - Technology is provide for the effect of deformation on ingot microstructure during forging in hydraulic presses. Five deformation effects are realized during forging with traditional...     

Microlens-Enhanced Substrate Patterning and MBE Growth of GaP Nanowires

Semiconductors - In this paper we demonstrate the results on selective area growth of GaP nanowires via self-catalyzed growth method using molecular beam epitaxy (MBE) technique on patterned...     

The effect of levitated water on fermentation kinetics

The rate of anaerobic glucose fermentation by baker's yeast is found to be altered when tap water is replaced with "levitated" (i.e., hydrodynamically processed) water. To analyze the effect in more detail, we developed a fermentation kinetics model that differentiates between (i) nutrient transport into the cell, (ii) the "catabolic" and (iii) the "anabolic" reactions. As a result, the levitated water affects specifically the glucose uptake kinetics, whereas the other kinetic parameters remain unchanged. Remarkably, the sign of the effect changes with the water used to prepare the culture. When levitated water is used for both the culture preparation and the fermentation, the rate constant of glucose transport is increased by (67+/-25)%, relative to ordinary tap-water. When the culture is prepared in ordinary water and only the fermentation is performed in levitated water, the rate constant of glucose transport decreased by (50+/-12)%. Three-week old levitated water has no discernable effect any more.     

Experience in eddy-current testing of mounting holes in aircraft components

Opportunities offered by the static and dynamic eddy-current techniques for testing mounting holes in aircraft components fabricated from nonmagnetic materials and features of these techniques are considered. Examples of applications of eddy-current techniques demonstrating considerable advantages of the dynamic technique in detection of cracks around holes are given.