purpose: to evaluate the corneal endothelial cell density and polymegathism one year after laser assisted keratomileusis using mitomycin c. methods: one hundred and three eyes from 52 patients who underwent laser assisted sub-epithelial keratomileusis using mitomycin c 0.02% for 30 seconds entered this study. corneal endothelial cells were evaluated using specular microscopy before and one year...

Questionnaires were sent to 452 hospitals in the RSA and SWA/Namibia requesting information on triplet pregnancies over a 10-year period. Information on 367 sets of triplets from 150 hospitals was adequate for analysis. The incidence of triplets was 0,04% of all deliveries. As many as 45% of triplets were diagnosed during the first or second stage of labour. These infants had a significantly lo...

We describe the sources of stray light and thermal background that affect JWST observations, report actual backgrounds as measured from commissioning early-science compare these levels to prelaunch predictions, estimate impact on science performance, explore how probe achieved configuration deployed observatory. find for almost all applications, observatory is limited by irreducible astrophysic...

The trade-off between process speed and resolution in microstereolithog-raphy (µSL) roots on the diffusion-limited kinetics of photopolymerization. Using a numerical model, we have investigated the influence of diffusion dominant effect under high photon flux. Radical depletion turned out to limit the smallest feature achievable to the order of 10 µm under high process speed. A solution of puls...

Knowledge derived from global tropospheric wind measurement is an important constituent of our overall understanding of climate behavior [1]. Accurate weather prediction saves lives and protects properties from destructions. High-energy 2-micron laser is the transmitter of choice for coherent Doppler wind detection. In addition to the eye-safety, the wavelength of the transmitter suitably match...

The role of oxygen availability in determining the local physiological activity of Pseudomonas aeruginosa growing in biofilms was investigated. Biofilms grown in an ambient-air environment expressed approximately 1/15th the alkaline phosphatase specific activity of planktonic bacteria subjected to the same phosphate limitation treatment. Biofilms grown in a gaseous environment of pure oxygen ex...

Metal Matrix composites (MMCs) are light weight, high-strength materials with potential application in areas such as automobile, aerospace, defence and other industries. MMCs are projected to significantly reduce the overall weight of the vehicle and aircraft while maintaining satisfactory structural strength. Micron and Nano-sized ceramic particle reinforced aluminum matrix composites fabricat...

contagious agalactiae (c.a.) is one of the most common disease affecting small ruminants which is caused by mycoplasma agalactiae. this disease is particularly widespread around the world and iran is one of the countries that c.a. is present. the aim of this study was isolation and identification of m. agalactiae (mg) with culture and pcr technique in milk samples in kordestan province, iran. a...