The fine lymphatic network of the hepatic pedicle and of the common b i le duc t , as p roved by immunohistochemical tecniques, plays an important role in many clinical syndromes. Common bile duct is supported by absorbing and collector lymphatics inducing a possible regulation of the flowing fluid besides that purely mechanical of conduction. The absence of valves in lymphatics allows an inver...

introduction the significant of solar energy as a renewable energy source, clean and without damage to the environment, for the production of electricity and heat is of great importance. furthermore, due to the oil crisis as well as reducing the cost of home heating by 70%, solar energy in the past two decades has been a favorite of many researchers. solar collectors are devices for collecting ...

It only seems like yesterday a tmiliar saying no doubt, but it is hard to realize that the Journal is now entering into its 10th year ofoperation. During the period we have had a very good and steady supply of papers and we have had very little problem in meeting our publication schedule. At present we have papers available well into our 10th year andwith those promised, we should not have any ...

This paper presents an optimization of a solar chimney power plant with an inclined collector roof using genetic algorithms. Five design parameters that affect the system performance are the collector radius, collector inlet height, collector outlet height, chimney height and diameter. A multi-objective design to simultaneously optimize three conflicting objectives including system efficiency, ...

This paper proposes a new short-circuit protection method for an IGBT. The proposed method is characterized by detecting not only gate charge but also gate voltage of the IGBT. This results in a shorter protection time, compared to the previous method that detects only the gate charge. A real-time monitoring system using an FPGA, A/D converters, and a D/A converter is used for the proposed prot...

The electrical and magnetic properties of the spin-valve transistor (SVT) are investigated as a function of transistor size. A new fabrication process, designed to study the size dependence of the SVT properties, uses: silicon-on-insulator (SOI) wafers, a combination of ion beam and wet etching and a negative tone photoresist (SU8) as an insulating layer. The Si/Pt emitter and Si/Au collector S...