chitosan/polyethersulfone (cs/pes) composite membrane was prepared from casting chitosan solution on polyethersulfone substrate membrane. the substrate membrane was prepared by phase inversion technique using polyethersulfone (pes) and dimethylacetamide (dmac) as solvent with and without the addition of polyvinylpyrrolidone (pvp) as pore-forming agent. the effects of the composition of the c...

this paper presents a novel control approach used in shunt active power filter based on variable structure control combined with random pwm technique (rvsc) that provides robust, fast, and more favorable performance for active power filter. this control strategy is compared with two other strategies to show the effectiveness of the introduced methods; pulse width modulated proportional-integral...

The use of membrane filters has gained importance as a unique and effective technique for the cultivation and isolation of microorganisms. These filters have been used for the enumeration of coliform bacteria (Clark and Kabler, 1952), the demonstration of Salmonela typhosa in well water (Collet et al., 1953), and for the isolation of Brucella abortm from blood (Braun and Kelsh, 1954). In additi...

The optical method of De Ley et al. (1970) for determining DNA/DNA homologies was reexamined. Several parameters such as incubation temperature, incubation time, DNA concentration and DNA fragment length were checked and the optimal conditions established. Hybridization data of several anaerobic Gram-positive cocci were compared with values obtained by the membrane filter technique. The agreeme...

Distortions due to reverberation have detrimental effect on the performance of automatic speech recognition (ASR). In this work, an auditory filter-bank based feature is presented to improve the ASR in reverberant conditions. The proposed technique is based on the gammachirp filter bank which provides level dependent frequency response to emulate mechanisms performed in the human auditory syste...

Chitosan/polyethersulfone (CS/PES) composite membrane was prepared from casting chitosan solution on polyethersulfone substrate membrane. The Substrate membrane was prepared by phase inversion technique using polyethersulfone (PES) and dimethylacetamide (DMAc) as solvent with and without the addition of polyvinylpyrrolidone (PVP) as pore-forming agent. The effects of the composition of the c...