A method for the controlled positioning of small particles in one or two dimensions by an ultrasound field excited by a surface wave is presented. Particles of a diameter between 10 and 100 microm placed on a surface can be concentrated at certain locations and moved over the surface. In other approaches it is possible to let the particle levitate freely in the fluid. However for the use of ult...

For production of high quality PBX charges, it is essential to have low viscosity formulations available during the casting process. As generally known, for a certain filling grade, casting viscosity depends strongly on particle size distribution and on particle shape. We have shown in previous work, that a high tap density of the solid energetic material is one strong requirement to get low vi...

the increasing world demand for fish cannot be met by capture fisheries. aquaculture production is increasing and nowadays cage culture has an important role in meeting the world’s fish demand. the design of the physical structure of a cage is determined by the oceanographic conditions of the culture site. each design is site-specific and knowledge of the topography, wind force and direction, p...

The aim of this study was to analyze electromyography (EMG) responses of vastus lateralis muscle to different whole-body vibration frequencies. For this purpose, 16 professional women volleyball players (age, 23.9 +/- 3.6 years; height, 182.5 +/- 11.1 cm; weight, 78.4 +/- 5.6 kg) voluntarily participated in the study. Vibration treatment was administered while standing on a vibrating platform w...

The use of supercritical fluids in the area of material processing and for particle formation has been known for several years now. The advantages of supercritical fluid processing include mild operating temperatures, production of solvent free particles and easy micro encapsulation of particles. One of the attractive methods of particle processing using supercritical fluid is the Supercritical...

where the qk represent charges, Lik inductances, Rik resistances, Gik reciprocals of capacitance, the Ejk are random e.m.f's**, and primes denote differentiations with respect to time. The theory of such systems of equations, quite carefully examined during the war years in applications to noise in electrical networks, turns out also to be applicable to the various mechanical systems—in particu...

Jump and pull-in instability are common nonlinear dynamic behaviors leading to the loss of performance reliability structural safety electrostatic micro gyroscopes. To achieve a better understanding these initial-sensitive phenomena, dynamics gyroscope system considering nonlinearities stiffness forces explored from global perspective. Static analyses performed estimate threshold detecting volt...