Heritage space telescope mirror technology—i.e. large, monolithic glass primary mirrors—has reached an upper limit on allowable aperture diameter given launch vehicle volume and mass constraints. The next generation of space telescopes will feature lightweight, actively controlled, segmented primary mirrors in order to achieve the advances in angular resolution and sensitivity that larger apert...

background: studies have demonstrated that sickle cell trait can be found in an asymptomatic healthy carrier with normal complete blood count (cbc) and red blood cell (rbc) indices. according to iranian ministry of health bulletin instructions, prenuptial thalassemia screening program (tsp) primarily depends on rbc indices which are measured through a routine cbc. only when these levels are bel...

methods retrospective cohort study of blunt trauma patients with rib fractures at a level i trauma center that had both a cxr and a ct chest. the ct finding of ≥ 3 additional fractures in patients with ≤ 3 rib fractures on cxr was considered clinically meaningful. student’s t-test and chi-square analysis were used for comparison. results we identified 499 patients with rib fractures: 93 (18.6%)...

Background: Sickle cell disease occurs due to a mutation in β chains and the substitution of valine instead of glutamate in the sixth position of the ß-chain that causes polymerization and vascular blockage. The aim of this study was to compare the serum C, S proteins and factor V Leiden between sickle cell patients and the control group. Materials and Methods: In this case-control study, perf...

This study discusses the improvement of surface finish of medium or large holes beyond traditional drilling, boring, rough turning, or extruding by electrochemical smoothing using inserted rib-plate electrodes. High electrical current is not required when the rib plate is used to reduce the engaged area for large hole. Traditionally, the hole polishing requires a sequence of complicated premach...

We propose a simulation framework to simulate the computed tomography acquisition process. It includes five components: anatomic data, respiration modelling, automatic parametrisation, X-ray simulation, and tomography reconstruction. It is used to generate motion artefacts in reconstructed CT volumes. Our framework can be used to evaluate CT reconstruction algorithm with motion artefact correct...

Ionizing radiation effectively reduces the number of common microbial pathogens in fresh produce. However, the efficacy of the process for pathogens internalized into produce tissue is unknown. The objective of this study was to understand gamma irradiation of lettuce leaf structure exposed in a Cs irradiator using MCNP. The simulated Cs irradiator is a self-shielded device, and its geometry an...