introduction abnormal neural impulses in the nervous system may lead to various diseases and disabilities. high frequency alternating currents (hfac) has been used to block the propagation of such impulses and improve the symptoms or disabilities. the technique is safe, reversible, and relatively selective, and its reliability, the optimum stimulation parameters, and elimination of the onset re...

A major upgrade of the Tore Supra heat and particle exhaust capability, known as the CIEL project [P. Garin et al.,this conference] and installed during the year 2000 shutdown, will raise the heat exhaust capability to 25 MW (convected + radiated) steady-state, and the pumping capability to -4 Fa.m3/s, and will allow Tore Supra to investigate high power steady-state plasma operation, with targe...

This paper discusses the trade-off between surge-current capability on the one hand and reverse-recovery charge, ruggedness and softness of high-voltage diodes on the other hand. Diodes with a CIBH (Controlled Injection of Backside Holes) structure in front of the cathode and a highly doped p-region combine high surge-current capability with reverse-recovery ruggedness and softness. This can be...

This essay combines the factor analysis with the characteristics of high-tech industries, and makes comparison among China's 5 major categories of high-tech industrial innovation capacity. High-tech industrial innovation capability assessment model is built to evaluate the current development of China’s high-tech industry innovation capability, analyze the innovation capacity of each high-tech ...

This paper proposes the use of bridge type fault current limiters (BFCLs) as a potential solution to reduce the impact of fault disturbance on voltage source converter-based high voltage DC (VSC-HVDC) systems. Since VSC-HVDC systems are vulnerable to faults, it is essential to enhance the fault ride-through (FRT) capability with auxiliary control devices like BFCLs. BFCL controllers have been d...

Conventional vertical power MOSFETs are limited at hig h voltages (>500V) by the appreciable resistance of their epitaxial drain region. In a new MOS-gate controlled device called an IGBT, this limitation is overcome by modulating the conductivity of th e resistive drain region, thereby reducing the on-resistance of th e device by a factor of at l east 10. However, the device previously describ...

This paper presents a circuit design technique suitable for the realization of winner-take-all (WTA), maximum (MAX), looser-take-all (LTA), and minimum (MIN) circuits. The technique presented is based on current replication and comparison. Traditional techniques rely on the matching of an N transistors array, where N is the number of system inputs. This implies that when N increases, as the siz...

The current success of organizations depends on the successful implementation of Information and Comunication Technologies (ICTs). Good governance and ICT management are essential for delivering value, managing technological risks, managing resources and performance measurement. In addition, outsourcing is a strategic option which complements IT services provided internally in organizations. Th...