there are some evidences on elamite seals that show iranian people had enough knowledge to construct small dome on cylindrical spaces like silo in the third millennium bc. but the foundations of large dome over square spaces were formed in the parthian period. bazeh-hur dome chamber with the corners of wood in khorasan province is the most ancient dome from the sasanian dynasty. since the sasan...

During development, tissues undergo complex cellular rearrangements and changes in shape that produce a diversity of body plans and the functional organs therein. The Drosophila egg chamber has emerged as an exciting and highly tractable model in which to investigate novel mechanisms driving the elongation of tissues. Egg chambers are multicellular assemblies within flies' ovaries that will eac...

Background Although the depth of the counting chamber is an important factor influencing sperm counting, no research has yet been reported on the measurement and comparison of the depth of the chamber. We measured the exact depths of six kinds of sperm counting chambers and evaluated their accuracy. MaterialsAndMethods In this prospective study, the depths of six kinds of sperm counting chamber...

BACKGROUND Depressive and anxiety disorders are common in general practice but not always treated adequately. Introducing stepped care might improve this. In this randomized trial we examined the effectiveness of such a stepped care model. METHODS The study population consisted of primary care attendees aged 18-65 years with minor or major DSM-IV depressive and/or anxiety disorders, recruited...

In this paper a new process is presented for improving efficiency of cyclone de-dusting systems. The cyclone is coupled with a specially designed cylindrical chamber which includes a rotating tube inside it with air impinging nuzzles, drilled on the peripheral surface of the tube. The nuzzles help in pushing and throwing the particles to the outer radius distances during downward flow of du...

Stepped spillwayflows are characterised by significant free-surface aeration downstream of the inception point of air entrainment. The stepped design is advantageous for applications which require large energy dissipation and strong flow aeration. While the energy dissipation rate for embankment stepped spillways was studied previously, the optimum design for aeration and air–water mass transfe...

BACKGROUND The Disability in Strategies for Care (DISC) study was the first large randomised controlled trial to compare alternative treatment strategies in the acute treatment of migraine. With 835 patients in its intention-to-treat efficacy analysis, DISC compared a stratified care strategy, where initial therapy was based on clinical need as determined by the Migraine Disability Assessment S...

This article considers the seismic behavior of beam-to-column joints in steel frames for different bolt arrangements by using of finite element modeling. As the most important beam-to-column joint type, the beam-to-column joints with end-plate is chosen for the analysis. Four different specimens have been analyzed. These models had some differences such as bolt arrangement and the presence or a...

AIM To compare postoperative keratometric corneal refractive changes after phacoemulsification surgery between pre-incision and single stepped clear corneal incision techniques. PATIENTS AND METHODS This prospective clinical study included 40 eyes of 40 patients who underwent clear corneal cataract surgery. Twenty eyes were operated using pre-incision technique (Group A), and 20 eyes using si...

OBJECTIVE Both methadone and buprenorphine are effective therapy for heroin dependence. Efficacy is best documented for methadone maintenance therapy, but safety concerns limit its use. Buprenorphine offers lower overdose risk and improved access, but efficacy may be lower. The authors compared adaptive, buprenorphine-based stepped care to optimal methadone maintenance treatment. METHOD This ...