This report presents the design procedure of a buck converter, which converts a 22V∼32V DC input voltage to a 15V DC output, under a resistive load variation from 1.5Ω to 4.5Ω. Detailed analysis and simulation results, as well as electrical and thermal device specifications are provided. A voltage-mode PI controller is designed to stabilize the averaged system under input and load variations. T...

in order to evaluate cardinal temperatures and optimum thermal range of germination of three medicinal plants including thymus transcaspicus, foeniculum vulgare and  calligonumjunceum  an experiment was conducted in a completely randomized design with three replications. therefore, this experiment was conducted to study of the seed germination characteristics to temperature. the we used three m...

In this study, the effect of surfactants (Tween-80 and Acetonitrile) inclusions in the culture medium of Bacillus subtilis on the yield and characteristics of extracellular protease was investigated. The results showed that addition of Tween-80 increased the enzyme yield by 5 folds and thermal stability from 50C to 60C. Tween-80 did not affect the optimum pH, KM and VMax values as well as the e...

Saffron corms are attacked by a wide variety of arthropod pest species and mites one them. Among Arachnida class bulb mite causes considerable damage to saffron crop presence this is regular feature in its cultivation. To record the occurrence mite, field study was conducted at different growing areas Kashmir. For biology pest, laboratory Department Entomology, Faculty Horticulture, Sher-e-Kash...

Experiments were conducted to investigate the effects of photo-oxidation on organic aerosol (OA) emissions from flaming and smoldering hardand soft-wood fires under plume-like conditions. This was done by exposing the dilute emissions from a small wood stove to UV light in a smog chamber and measuring the gasand particle-phase pollutant concentrations with a suite of instruments including a Pro...

Herein, NiO-decorated Ni nanowires with diameters ca. 30-150 nm derived from Ni wire backbone (ca. 2 μm in diameter) is directly synthesized on commercially available Ni foam as a renovated anode for Li-ion batteries. Excellent stability with capacity 680 mAh g(-1) at 0.5C (1C = 718 mA g(-1)) is achieved after 1000 cycles. Superior rate capability is exhibited by cycling at extremely high curre...