Usability engineering and usability testing are concepts that continue to evolve. Interesting research studies

Abstract— Flicker electroretinograms are steady-state electroretinograms (ERGs) generated by high rate flash stimuli that produce overlapping periodic responses. When a flash stimulus is delivered at low rates, a transient response named flash ERG (FERG) representing the activation of neural structures within the outer retina is obtained. Although FERGs and flicker ERGs are used in the diagnosis of many retinal diseases, their waveform relationships have not been investigated in detail.

This paper is expository in nature. It attempts to describe how Islam came in response to a cultural need to civilize the ancient Arabs but is fit for all times and people. The faith’s influence proved to be thorough. Its legislative matter covers all aspects of human life: social, political, economic, and educational. It also delineates the paths to good health, scientific progress and human relationships including family ties, matrimonial matters, and inheritance distribution. However, Muslims seem to have a lax hold on Islam.