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The Effect of an Ergonomic Intervention on Musculoskeletal, Psychosocial and Visual Strain of VDT Entry Work: Organization and Methodology of the International Study

100%

Dainoff M. J. , Aaras A. , Horgen G. , Konarska M. , Larsen S. , Thoresen M. , Cohen B. G. F.

International Journal of Occupational Safety and Ergonomics

2005

tom Vol. 11, No. 1

9--23

This special issue of the International Journal of Occupational Safety and Ergonomics (JOSE) reports the results from an extensive multinational and multidisciplinary collaborative investigation of the impacts on visual display terminal (VDT) work of musculoskeletal, visual, ergonomic, and psychosocial factors. For brevity, this effort has been referred to as the MEPS project musculoskeletal-eyestrain-psychosocial-stress). This paper lays out the basic methodological structure of the study. The study was conducted in 4 countries utilizing VDT data entry workers as the primary subject population. A battery of objective and subject assessment measures, including muscle load, visual function, physical and visual strain, postural, ergonomic and psychosocial factors, were assessed at 3 different points in time. A pre-test was given prior to an ergonomic intervention. Two posttests were given 1 month and 1 year after the ergonomic intervention.

The Effect of an Ergonomic Intervention on Musculoskeletal, Psychosocial and Visual Strain of VDT Data Entry Work: The Norwegian Part of the International Study

84%

Aaras A. , Horgen G. , Ro O. , Loken E. , Mathiasen G. , Bjorset H. H. , Larsen S. , Thoresen M.

International Journal of Occupational Safety and Ergonomics

2005

tom Vol. 11, No. 1

25--47

The Norwegian MEPS (musculoskeletal-eyestrain-psychosocial-stress) study included 3 groups: data entry, data dialogue (female) and data dialogue (male). Before intervention, the data entry group reported significantly more symptoms and signs of musculoskeletal illness and had longer periods in front of the video display terminal (VDT) without a break. The ergonomic intervention consisted mainly of ergonomic information and training. After intervention, the data dialogue female group reported a significant reduction in shoulder pain in parallel with a reduction in trapezius load. Increasing the understanding in how to adjust the work stand and chair may have been contributing factors to reducing the pain level. There was a significant reduction in eye problems in all groups; the greatest reduction in eye symptoms was seen in the groups who had new optometric corrections.

The effect of stationary and variable electromagnetic fields on the germination and early growth of radish (Raphanus sativus}

84%

Konefal-Janocha M. , Banas-Zabczyk A. , Bester M. , Bocak D. , Budzik S. , Gorny S. , Larsen S. , Majchrowski K. , Cholewa M.

Polish Journal of Environmental Studies

2019

tom 28

nr 2

Magnetic fields have a great impact on processes within plants. In our experiment, radish seeds (Raphanus sativus) were exposed to a stationary magnetic field (with an intensity of 8 mT and 20 mT) and variable magnetic fields (with an intensity of 6 mT and a frequency of 50 Hz). Two time intervals of exposure were selected: 3 min and 12 min. After exposure, treated seeds were compared with the control seeds (without magnetic field exposure) in the following categories: seedling length, germination rate index (GRI), vigour index, and seed germination. The results revealed that magnetic fields increased the rate of germination, vigour index, and GRI for all samples treated with stationary magnetic field. It is difficult to distinguish a specific form of dependence between the measured parameters and the intensity of the magnetic fields and the selected time intervals. The most promising results were obtained from the sample that was exposed to a stationary magnetic field intensity of 20 mT at 12 min. All measured values decreased when the seeds were exposed to variable magnetic fields at the exposure time of 12 min.