Lundström, Ronnie, 1985. Vibration exposure of the glabrous skin of the human hand. Umeå University, Medical Dissertions, New Series, 136. An occupational exposure to hand-arm vibration can cause a complex of neu­ rological, vascular and musculo-skeletal disturbances, known as the 'vibra­ tion syndrome'. However, the underlying pathophysiological mechanisms are not at all clear. Early signs of ...

Opto-mechanical chaotic oscillation of an on-chip resonator is excited by the radiation-pressure nonlinearity. Continuous optical input, with no external feedback or modulation, excites chaotic vibrations in very different geometries of the cavity (both tori and spheres) and shows that opto-mechanical chaotic oscillations are an intrinsic property of optical microcavities. Measured phenomena in...

The deformation range, forces and frequency of the Magnetic Shape Memory Alloys (MSMAs) render them suitable for applications in electro-mechanical transducers, used to control pneumatic valves. A fast-operating electro-mechanical transducers can be designed, whose driving elements should not execute any motion, as they do in valves available to date, and which should get deformed instead. Util...

We present three novel mechanical laser shutter designs based, respectively, on a stepper motor, a relay, and a piezoelectric actuator. Each shutter type is ideally suited to a specific shuttering application. The stepper motor is well suited for applications requiring low vibrations, the relay is compact and capable of rapid bursts, and the piezoelectric is 2 orders of magnitude faster than ot...

Service reliability in electrical power networks is of crucial importance and depends on the quality and availability of electrical equipment. Operation resources like power transformers have to be considered, representing the intersections of energy networks. Regarding the age of power transformers e.g. used in the German grid surveillance is gaining importance. An approach for evaluating the ...