A class of nanocrystalline alloys, HITPERM ~Fe, Co!–M–B–Cu (M5Zr,Hf,Nb, etc.! found to exhibit excellent soft-magnetic properties is being studied for use as a soft-magnetic underlayer for perpendicular recording media. Previously, we reported that HITPERM films of ;100 nm thickness sputtered at room temperature ~RT! and at ;2.3 W/cm power density had exhibited an amorphous microstructure, whic...

In this study, a solid oxide fuel cell (SOFC) stack has been successfully fabricated and tested by using direct natural gas. The main objective of this research was to achieve optimal long-term performance of the SOFC stack without carbon deposition by using low-cost natural gas as a fuel. The stack configuration was improved by a new interconnect design and made of cost-effective raw materials...

the aim of this study was to assess the surface of yttrium-stabilized tetragonal zirconia (y-tzp) after surface treatment with lasers and airborne-particle abrasion.first, 77 samples of presintered zirconia blocks measuring 10 × 10 × 2 mm were made, sintered and polished. then, they were randomly divided into 11 groups (n=7) and received surface treatments namely, er:yag laser irradiation with ...

A high frequency, low power 1:16 deserializer has been developed using the 0.25μm BiCMOS SiGe technology from ST Microelectronics to meet the ALMA project requirements. The input shift register is clocked at 4 GHz and the output data are transferred at 250 MHz. Nominal operation has been observed up to 8 GHz. With 2.5 V supply, the circuit dissipates around 650 mW an especially low value compar...

This paper proposes an Optimal Power Flow (OPF) algorithm by Direct Load Control (DLC) programs to optimize the operational cost of smart grids considering various scenarios based on different constraints. The cost function includes active power production cost of available power sources and a novel flexible load curtailment cost associated with DLC programs. The load curtailment cost is based ...

This paper presents a monolithic GaN driver with deadtime generator (DTG) for half-bridge DC-DC buck converters. The proposed integrated circuits (ICs) were fabricated in 3 µm enhancement-mode MIS-HEMTs process. DTG converter can operate at 250°C large gate swing of 10 V, and it exhibits maximum efficiency 80% high temperatures, VIN= 30 V 100 kHz. requires one control signal generates fewer tha...