Background: Understanding of the incident electron energy and angular distributions from clinical electron accelerators (linacs) is important for dosimetry and treatment planning. The most important goals of this study were to evaluate the energy fluence and angular distributions of electron beams from a Neptun 10PC linac using the Monte Carlo (MC) code. Materials and Methods: The lina...

Operation Theatre (OT) is the most important area where precise controlled on indoor air quality is required because it is directly related to patient health and its recovery period. This work aims to study and visualize the airflow distribution of conventional flat air diffuser ventilation system and newly designed angular air ventilation system in OT. Angular Air Distribution (AAD) system is ...

The gimbal stabilization mechanism is used to provide the stability to an object mounted on the gimbal by isolating it from the base angular motion and vibration. The purpose of this paper is to present a model of control servo system for one axis gimbal mechanism using a cascade PID controller. The gimbal torque relationships are derived by taking into consideration the base angular motion. Th...

We introduce the angular-momentum flux as the natural description of the angular momentum carried by light. We present four main results: (i) angular-momentum flux is the flow of angular momentum across a surface and, in conjunction with the more familiar angular-momentum density, expresses the conservation of angular momentum. (ii) The angular-momentum flux for a light beam about its axis (or ...

cesarean scar pregnancy (csp) is a rare, but life-threatening type of ectopic pregnancy. an exact and early diagnosis of csp is very important for prognosis. the aim of the present study was to describe 4 women with csp and discuss their clinical presentations, diagnoses, and various management options along with the published literature. four women with a suspicion of csp or cervical pregnancy...

a case of cervical ectopic pregnancy in a 37 years old woman with history of two previous cesarean sections and one dilatation/curettage. the case was the advanced cervical pregnancy reported in iran, which diagnosed in 12 week of gestation by mri and finally treated by hysterectomy.

introduction since abdominal pregnancies are mostly complicated, they are usually managed by laparotomy, but laparoscopy is an alternative method which some surgeons perform instead of laparotomy; especially in advanced pregnancy. case presentation we reported a 31 year old woman with last menstrual period of 18 weeks who had supra pubic pain and vaginal bleeding. after sonographic evaluations,...

in the present study, mechanical properties and low cycle fatigue behavior of a solid-solutionized aa6061 aluminum alloy produced by equal channel angular pressing (ecap) process were investigated. the grain refinement after two passes of ecap significantly increased the yield stress and ultimate tensile stress and decreased the ductility of the alloy. however, the improvement of low cycle fati...

among different spd techniques, equal channel angular pressing has attracted the most attentions,because of applying large strain to solid bulk materials. in this research, ecap process up to 6passes was carried out on a pure copper and a 6012 al-mg-si alloy with bc route in ecap dieswith φ=120 and ψ=20 and diameter of 20and 10 millimeter respectively. moreover, x-raydiffraction (xrd) system wa...