When it is desired to transmit redundant data over an insecure and bandwidth-constrained channel, it is customary to first compress the redundant data and then encrypt it for security reasons. In this paper, we investigate the novelty of reversing the order of these steps, i.e. first encrypting and then compressing. Although counter-intuitive, we show surprisingly that through the use of coding...

In an attempt to clarify the pathophysiology of haemodynamics in legs with venous ulcer we investigated the effect of a single intermittent pneumatic compression treatment on the peripheral resistance of leg arteries and the cutaneous laser Doppler flux in the leg. Eight patients with venous leg ulcers and 10 subjects with healthy legs were investigated. Doppler waveforms of the leg arteries an...

An hydrodynamic code coupled with a "PUFF-type" equation of state has been set up to investigate the thermomechanical behaviour of an aluminium alloy irradiated by a 1 MeV electron beam. The absorbed flux can reach 3500 J/cm2 with an exponential damping along 1 mm dep;th. A weaker flux .is produced with 1 MeV protons whose the stopping range is 10 pm for a 8000 J/g dose. Thermal stresses genera...

This paper reports the design, fabrication, and testing of a permanent-magnet energy harvester generator for body motion. The described generator was capable to extract up to 117μW of power from walking, employing a non-resonant rotational mechanism. The planar generator proposed is composed of a rotor having multiple NdFeB permanent magnet pole-pairs with an eccentric proof mass. The stator ha...

Studi ini menganalisa aplikasi mesin permanen magnet fluks aksial sebagai generator. Tipe generator flux yang dianalisa yaitu single stator double rotor axial-flux. Tujuan dari studi adalah pengaruh penambahan inti terhadap performa Metode digunakan simulasi menggunakan FEEM 4.2. untuk mengamati parameter rapat (Br) dan (ϕ) pada celah udara, back-emf (E-rms) generator, kapasitas daya nyata (S) ...

a detailed model of wind power station, including double fed induction generator, dfig is presented in this paper. two control mechanisms are included in the model. the inner control system uses stator flux oriented control for the rotor side converter and grid voltage vector control for the grid side converter. the outer control system is used for wind turbine pitch angle. pscad/emtdc is used ...