abstract spacing between check dams depends on the stream bed slope, effective height of check dams and slope of deposited sediments behind the check dams. the slope of deposited sediments is more important than the other two factors because of complications in the way of its occurrence and its measurement after several years of dam construction. this research presents the effective factors aff...

statement of problem: the long-term success of a dental implant relies on implant osseointegration into native and viable bone, implant placement in an ideal position, and optimal hard and soft tissue contour. this requires the presence of sufficient alveolar bone volume, good alveolar ridge (practically with no sign of atrophy) and good surgical technique.   objectives: the aim of this randomi...

this paper discusses the arching effect as the formation of a stable arch in granular materials. for this aim, a developed trapdoor apparatus is designed in order to investigate the arch dimensions in term of the internal friction angle, average size and base angle of materials. observations show that for all tested granular ensembles, width and height of the arch increase with an increase in t...

in order to investigate effects of plant density and fertilizer rates on agronomic characteristic and yield tobacco (nicotiana tabacum) (cv k326) an experiment was conducted in the experimental field of tirtash research and education center. design of experiment was randomized complete block with factorial arrangement with three replications and 36 treatments conducted in 2007 year. treatments ...

Background: Palmaris longus (PL) is a muscle with marked variations. It is harvested as a tendon graft in many surgical proceduresin which a certain length of tendon is required. The aims of the present study were to determine the variations of this tendon in Iranian population and to find whether the length of PL tendon could be estimated by measuring the forearm length and height. Methods: We...

Facial width-to-height ratio has received a great deal of attention in recent research. Evidence from human skulls suggests that males have a larger relative facial width than females, and that this sexual dimorphism is an honest signal of masculinity, aggression, and related traits. However, evidence that this measure is sexually dimorphic in faces, rather than skulls, is surprisingly weak. We...