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Pawlak A.,Centralny Instytut Ochrony Pracy | Zaremba K.,Bialystok Technical University
Przeglad Elektrotechniczny | Year: 2012

Indirect lighting in which the observer sees no directly light sources, is attractive both in terms of lighting and aesthetics. The problem is the low efficiency of this type of lighting. During the simulation tests of indirect lighting installations with the use of lighting programs noted significant differences in the results obtained. Analysis of results showed the limited usefulness of these programs to perform calculations of lighting indirect lighting installations.

Kurpiewska J.,Centralny Instytut Ochrony Pracy | Liwkowicz J.,Centralny Instytut Ochrony Pracy | Nowak B.,Niepubliczny Zaklad Opieki Zdrowotnej DERMED
Przeglad Dermatologiczny | Year: 2012

Introduction. According to GUS data over 600 000 persons are employed in the health service (HS) sector in Poland. Contact dermatitis of the hands is one of the most frequent diseases among physicians, nurses, midwives, dentists, technicians and clinic services. Skin disorders are caused by frequent contact with water (wet work), soap, detergents, disinfectants, medical instruments and by natural rubber gloves. The skin of the hands can be protected against harmful substances with protective preparations. Objective. Our aim was to study the prevalence of self-reported skin lesions on hands and forearms in health service workers and to confirm that well-chosen barrier preparations, properly spread on the skin, provide good prevention of contact skin changes. Material and methods. Six preparations offered on the market as water-resistant (hydrophobic cream) were tested with laboratory methods. The product marked as "C" was the most effective one, so it was used in controlled application in one hospital. Results. The study was conducted on 107 persons. Skin changes such as erythema, dryness and scaling were reported by 50.5% of them. Thirty-one persons (61% nurses, 19% midwives, 7% physicians and 13% persons of other HS occupations) took part in the controlled study. A dermatologist evaluated the condition of the skin of the hands before and after application of the product. Thirty days after the onset of the study all subjects considered the condition of the skin to be much better. Conclusions. It is necessary to popularize among health service workers information about the possibility of prevention of contact dermatitis with skin protection measures i.e. barrier creams. Use of skin protection measures by HS workers will help to decrease morbidity and financial losses due to treatment, sick leave, insurance, pensions, etc.

Pawlak A.,Centralny Instytut Ochrony Pracy
Przeglad Elektrotechniczny | Year: 2013

The article discusses criteria for the assessment of exposure to visible radiation (blue light), methods of measurement of radiation exposure and hazards during welding. Then the author presents the results of measurements of exposure to visible radiation in the electrical and gas welding and on positions of aging lamps and visual inspection. Based on the results of these measurements, the occupational risk for the studied positions has been determined.

In this paper a model of active noise control system for in situ applications is presented. The model is based on the multiprocessor OMAPL137 system on chip. Functionality of the OMAP-L137 is briefly discussed including hardware and software resources utilized to meet system requirements. Control algorithm using neural network and genetic algorithm is presented and validated by experimental tests.

In the article structure of a system for remote monitoring exposure to noise of workers using earmuffs and in this way its proper use is described. In this system for wireless data transfer a ZigBee network is utilized. Technical realization of ZigBee network is based on XBee modules working in 2,4 GHz frequency band. In the article purposes and construction of system components are described. © 2014, Wydawnictwo SIGMA - N O T Sp. z o.o. All rights reserved.

Exposure of workers to health hazards due to contact with mineral oils occurs primarily in the chemical, petrochemical, machinebuilding, metallurgic and car industries. Under worksite conditions, the respiratory system and the skin are the primary routes of entry of mineral oils into the human body. Long-term exposure of the skin to oily substances may lead not only to irritation and allergic lesions. The studies conducted in this area have confirmed a significant increase in the incidence of skin cancers in persons chronically exposed to mineral oils. Protection of workers' health at worksites associated with the risk of contact with mineral oils requires, in addition to collective protective and organizational solutions, personal protective equipment with appropriate protection and utility parameters confirmed by laboratory tests. The essential preventive measures include protection of the human skin by means of appropriate protective clothing and gloves, which provide an effective barrier against a wide spectrum of chemical compounds present in mineral oils. Knowledge of polymer materials is the prerequisite for designing more and more effective and functional protective clothing and gloves. Studies aimed at obtaining higher levels of skin protection against varied toxic substances, including mineral oils, have been conducted, among others, to develop modern glove and clothing materials ensuring resistance to oils. The rapid progress of nanotechnology and the use of nanoadditives in polymer materials has made it possible to undertake works aimed at developing modern polymer nanostructures designed for construction of oil-resistant protective clothing and gloves. In this review paper the authors have presented the current knowledge of polymer materials, from traditional ones to polymer nanostructures, used in personal equipment protecting against mineral oils. © Instytut Medycyny Pracy im. prof. J. Nofera w łodzi.

Depressive disorders can be treated not only by the means of adequate drugs (pharmacotherapy) and psychotherapy, but here also are effective various forms of the electric and magnetic head stimulation. The paper presents these techniques and carries out the comparison in relation to theirs effectiveness, safety, and different other factors.

This paper presents numerical analysis of the error of the measurement of the electric potential of electrostatic surface charge distributed on the thin dielectric plane. The virtual measurement was made with the field mill voltmeter, calibrated with metallic plate which electric potential was established in respect to the earthed filed mill voltmeter.

The paper presents the results of experimental investigation aimed at the assessment of lighting preferences of workers with moderately poor sight. Conduction of research was described, as well as, the method of assessment of eye fatigue, that consists of objective and subjective studies. The author presents the designed of lighting system that was the alternative for general lighting with parabolic louver during the research.

An important role among protective means play the elements of control systems performing safety functions. When the validation process of a safety performance level(PL) achieved by those systems is conducted properly one can draw the conclusion that any defect appearing in those systems would not cause the loss of safety functions. The paper presents formalized validation of the PL procedures for different categories and PL 's for introdcting into the computer program which makes more efficient all the operations involved into the validation and documentation processes of safety performance level achieved by machine control systems.

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