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Biomedical subjects

I I Litvak

Publications and source records attributed to I I Litvak.

4 recordsLinked to original sources

[Topical problems of hygienic certification of computers].

The paper provides evidence that while making a hygienic certification of computers it is necessary to rely not only on their physical and technical data, but on the characteristics obtained by defining the integral physiological parameters of the quality of displayed information perception. According the state standards CaH [symbol: see text] 2.2.2.54-96, their hygienic certification requires differential assessment of computers with the age-specific features of users (pre-school and young school children, middle- and old-aged schoolchildren, adults). It is proposed that CaH [symbol: see text] 2.2.2.54-96 should be supplemented by a regulation on choice of special working places with appropriate protective devices for the children of a risk group.

Adolescent↗

[The current problems of electromagnetic safety in computer classes].

He paper presents the data on the present-day situation in the computer classes in general educational schools to show electromagnetic safety. It shows that most of 37 classes do not satisfy the requirement of electromagnetic safety and proposes modes of elimination of this danger.

Adolescent↗

[Results of a complex evaluation of accommodative asthenopia in using different-design video monitors].

Eighty volunteer computer operators were examined experimentally under the conditions of working with different-type video monitors, i.e. electron-beam (EB), liquid-crystal (LC), including different visual loads (typing, computer games, and gaze fixation). Experiments lasted for as long as 6 hours. The absolute accommodation volume (AAV), relative accommodation reserve (RAR) and ergograms were comparatively evaluated. A lower AAV was registered in all types of visual loads under the conditions of using different-type monitors, and it made up 0.27-1.08 diopters. A maximum reduction of AAV was detected for gaze fixation and while working with liquid-crystal monitors. The RAR reduction ranged from 0.31 to 0.63 diopters. A maximum RAR reduction was noted for gaze fixation and while using the electronic-beam monitors. The nature of changed ergography curves occurred within the interval between I and IIb types of ergograms. In case of typing, the ergogram deviations were registered to a greater extent for the liquid-crystal monitors. The value of deviations for computer games was bigger, at the experiment end, for EB rather than for LC.

Adult↗