Despite many advantages of BrushLess DC motor, torque pulsation is one of the most important disadvantages of it. At first, an optimum primary design of BLDC motor is done using PSO algorithm. Then, other parameters for reducing the torque pulsation are considered by finite element method. It is shown that fractional slot structure has many advantages than conventional one. Both cogging and rip...

We present a sample of 167 type 2 AGNs with double-peaked [O III]λλ4959,5007 narrow emission lines, selected from the seventh data release of the Sloan Digital Sky Survey. The double-peaked profiles can be well modeled by two velocity components, blueshifted and redshifted from the systemic velocity. Half of these objects have a more prominent redshifted component. In cases where the Hβ emissio...

The orientation of osteons in cortical bone has been shown to correlate with the loading condition. The purpose of this study is to determine the orientation of osteons in the rib cage to better understand the behavior of the rib cage under mechanical load. A total of 37 rib specimens were removed from 21 rib locations from a male and female cadaver. Eight histological slides were created from ...

Seismic analysis of data from the Blake Outer Ridge indicates the presence of hydratebearing sediments overlaying gas-saturated sediments in this region. In an attempt to determine possible lateral and vertical variations of the hydrate and gas sediments, I performed a 2-D velocity analysis along two approximately perpendicular seismic lines. Subsequent determination of the seafloor and BSR ref...

The objective of this study was to specify the effects of centrifugation and different surface of soybean lecithin-based extender on post-thaw Sperm quality of Ghezel ram semen. Semen samples were gathered from 5 mature Ghezel ram two/week for 3 weeks. After initial evaluation, the approved semen samples were pooled together and split into equal parts in Falcon tubes. Three samples were combine...

the present study investigated the influence of air temperature and velocity on the drying kinetics and specific energy consumption during fluidized bed drying of soybean at 80, 100, 120 and 140ºc and airflow rates of 1.8, 3.1 and 4.5 m s-1. six mathematical models for describing the fluidized bed drying behavior were investigated. the value of the drying rate coefficient (k) increased with inc...