METHOD A 14" X 17" Kodak Industrial x-ray film, type M, is placed on a smooth surface in a darkroom. The original photoscan is superimposed on this film, and then both covered with a 15" X 18" glass plate, one-fourth inch thick, and exposed to an incadescent bulb for a very short period of time, 0.5-2.0 seconds. The ex posed film is developed and a negative picture is obtained. The contrast on ...

background: medical x-rays are the largest man-made source of public exposure to ionizing radiation. it is important to avoid conditions where the amount of radiation used is more than that needed for the procedure. materials and methods: the entrance skin exposure (ese) measurement was conducted for quality control of x-ray machines and survey of operator’s experimental techniques. the eses we...

The exposure time and the time between successive exposures were varied in a picture recognition task. Exposure times of .2, .5, 1.0, 2.0, and 4.0 sec. were orthogonally combined with between-slide durations of 1.0, 2.0, and 4.0 sec. Confidence ratings of recognition increased monotonically with exposure time but were not affected by the amount of time between slides. These results suggest ther...

  Background: The sporadic cases of radiation-activated multiple sclerosis (MS) has been previously described, with a few studies focused on the relationship between radiation and the risk of MS. The aim of our study was to evaluate the association between history of X-ray radiation and MS.   Methods : This case-control study was conducted on 150 individuals including 65 MS patients and 85 age-...

We report for the first time that polydiacetylenes (PDAs) can be alternatively prepared via a plasma induced polymerization process. The degree of polymerization and colorimetric transitions could be manipulated by controlling the power of plasma radiofrequency, exposure time and by using an acrylic mask, resulting in their great potential for patterning applications.

Published: 15, August, 2013; Vol. No. 4(2):19-22; www.gbtrp.com; All Right Reserved, ©Gayathri Teknological Publication, 2013. Abstract Nickel induced genotoxic effect on Allium cepa root meristem was evaluated after treating onion root tips with various concentrations of NiCl2 in different time intervals. Mitotic index was higher (9.87 ± 1.96) at initial concentration of 10μg/l in three time i...

In three picture-recognition experiments, we investigated the characteristics of “specific feature” and “holistic” information hypothesized to be extracted from pictures. In each experiment, exposure time was varied at study. The recognition test was two-alternative forced-choice in which the target/distractor relationship was manipulated in such a way that responding on the basis of one type o...

Continuous health monitoring has become a major theme of our aging society. Portable devices play an important role here. Many optical portable devices are susceptible to motion induced artifacts. We have performed an experimental study for detection of fluid pulsation based on multi-exposure speckle images, in presence of motion induced artifacts. Induced motion of a wide range of frequencies ...

The interaction of space and time affects perception of extents: (1) the longer the exposure duration, the longer the line length is perceived and vice versa; (2) the shorter the line length is, the shorter the exposure duration is perceived. Previous studies have shown that space-time interactions in human vision are asymmetrical; spatial cognition has a larger effect on temporal cognition rat...

If several items are associated with a common cue, the cued recall of an item is often supposed to decrease as a function of the increase in strength of its competitors' associations with the cue. Evidence for such a list-strength effect has been found in prior research, but this effect could have been caused both by the strength manipulations and by retrieval-based suppression, because the str...