Abstract:
BACKGROUND:The aim of the study was to analyze and modify methods used to estimate the range of restricted area corresponding with the limitation of exposure of the general public to electromagnetic fields in the vicinity of microwave relay antenna systems. MATERIALS AND METHODS:In this paper a well known spherical-wave model is revised. Some drawbacks of this model in terms of the microwave relay antenna systems are shown and a method for their elimination is proposed. The idea of this method is based on placing an equivalent point source of radiation behind the actual antenna, and then on taking into account the power density produced by this source over the antenna aperture. RESULTS:In the course of the study an algorithm for the range of restricted area estimation was developed. Some results of calculation validating the proposed method are presented. CONCLUSIONS:The proposed model and algorithm for the range of restricted area estimation may be employed in administrative procedures for evaluating the effects exerted on the environment. The proposed method can be regarded as an alternative to the presently employed spherical wave approach in the case of the microwave relay antenna systems.
journal_name
Med Prjournal_title
Medycyna pracyauthors
Bieńkowski Psubject
Has Abstractpub_date
2007-01-01 00:00:00pages
117-23issue
2eissn
0465-5893issn
2353-1339journal_volume
58pub_type
杂志文章相关文献
MEDYCYNA PRACY文献大全abstract::The author discussed problems arising from the use of different mathematical dose-response models for extrapolation of cancer risk from high to low doses. On the one hand, a linearized, multistage model, commonly used for evaluating cancer risk resulting from exposure to chemical carcinogens in the communal environmen...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1996-01-01 00:00:00
abstract::The concentration of glycosylated hemoglobin and (plasma) proteins has been measured in 111 workers of 6 MZRiP departments in Płock and in 54 healthy people. In all subjects the mean concentrations of glycosylated hemoglobin and glycosylated plasma proteins have been in so called "wide range of normal values". Signifi...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1985-01-01 00:00:00
abstract::The possibilities of impedance rheography in the diagnosis of the vascular form of the vibration syndrome have been presented. Three groups have been covered by the investigation: controls, subjects in occupational significant exposure to local vibration and subjects with the diagnosed vascular vibration syndrome. The...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1986-01-01 00:00:00
abstract::The experiment was carried out on male guinea pigs exposed to NO2 at a constant concentration of 0.1 ppm 24 h daily for 1, 2.5 and 6 months, or NO2 concentration was increased to 0.5 ppm twice daily, between 7:00 and 8:00 AM and 4:00 and 5:00 PM. After the exposure to NO2 was over the animals were killed by decapitati...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1985-01-01 00:00:00
abstract:BACKGROUND:Isothiazolinones are preservatives which are present in cosmetics, household chemicals and many other industrial products. Initially, a mixture of methylchloroisothiazolinone and methylisothiazolinone (MCI/MI - Kathon CG) was used, and then, from the beginning of the 21st century, only methylisothiazolinone....
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:10.13075/mp.5893.01037
更新日期:2020-09-24 00:00:00
abstract:BACKGROUND:Investigations on workplace bullying in the countries of Eastern Europe are yet not too extensive. The aim of the study has been to identify the most frequent bullying behavior and to explore the associations with psychological distress and post-traumatic stress symptoms in 3 female-dominated occupations in ...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:10.13075/mp.5893.00513
更新日期:2017-05-16 00:00:00
abstract::Epilepsy is a frequent diagnostic problem. It is also difficult to certify whether an epileptic patient is able to drive a motor vehicle. With the advent of efficient anti-epileptic treatment, a general practice of refusing epileptic patients driving license should be seriously reconsidered. However, the matter should...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:2002-01-01 00:00:00
abstract::The objective of the study was to determine the occurrence of a low-back-pain syndrome in coalminers. The pilot study also aimed at the evaluation of the study design and methods, prior to planned full-scale epidemiological assessment of the syndrome in this workforce. In two groups of subjects (204 persons employed i...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1996-01-01 00:00:00
abstract::The results of numerous epidemiological and experimental studies show that environmental exposure to lead in humans, as well as small doses of this element given to experimental animals exert hypertensinogenic and athoregenic effect. The vascular endothelium, involved in the development of arterial hypertension and ar...
journal_title:Medycyna pracy
pub_type: 杂志文章,评审
doi:
更新日期:2003-01-01 00:00:00
abstract:BACKGROUND:The quality assessment of the prophylactic examinations of employees in the context of professional qualifications of physicians, presented by the authors, distinguished four groups of physicians legally entitled to conduct these examinations: physicians specialized in occupational medicine or with equivalen...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:2008-01-01 00:00:00
abstract::The patch tests according to the Jadassohn-Bloch's method were made with five Polish epoxy resins--"Epidian"--in 487 workers exposed to their action, and in 113 persons of the control group. The percentage of sensitized persons among 487 examined amounted to 22,8%, the results of test in the control group being negati...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1977-01-01 00:00:00
abstract::This work discusses the influence of air-ions on human and animal organisms. It presents problem of measurements of airs-ions parameters and gives suggestions how to improve methods of investigation in order to analyse that influence in a more profound way. ...
journal_title:Medycyna pracy
pub_type: 杂志文章,评审
doi:
更新日期:1993-01-01 00:00:00
abstract:BACKGROUND:Due to their animal material processing, tannery workers may be exposed to biological agents. The aim of the study was the microbial contamination assessment of tanneries with different production specifications. Health risk was estimated based on particle size distribution. Moreover, indicators of microbial...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:10.13075/mp.5893.2014.005
更新日期:2014-01-01 00:00:00
abstract:BACKGROUND:The aims of the survey was to analyze the musculoskeletal system load during work performed by nurse anesthetists and to identify activities involving poor work postures along with their causes. MATERIAL AND METHODS:The observation process and the Ovako Working Posture Analysing System (OWAS) method were us...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:2008-01-01 00:00:00
abstract::The authors presented a general characteristics of Occupational Health Services in Sweden, their legislation, functioning, financing and objectives, with special reference to occupational safety and hygiene, and the working environment control. They discussed how the work environment is monitored by the external contr...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1995-01-01 00:00:00
abstract::Medical rescue teams might be exposed to the risk of accidental poisoning while performing rescue procedures. Exposure to the risk of lethal carbon dioxide (CO2) concentrations is a rare situation. This case study describes rescuing a patient who suffered from sudden cardiac arrest due to accidental CO...
journal_title:Medycyna pracy
pub_type:
doi:10.13075/mp.5893.00408
更新日期:2017-02-28 00:00:00
abstract::Forty petrochemical industry workers occupationally exposed to benzene levels within TLVs (30 mg.m-3) had their hepatic microsomal enzyme function quantitatively assessed by the antipyrine test. The clearance (C1AP) and half life (P1/2) of antipyrine in the saliva were determined. The benzene-exposed workers exhibited...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1988-01-01 00:00:00
abstract::Serum levels of carcinoembryonic antigen (CEA), alpha-fetoprotein (AFP) and beta-subunit of human chorionic gonadotropin (HCG) in coke oven workers were estimated in order to detect early biological effects of carcinogenesis. CEA, AFP and HCG concentrations were measured in 30 coke oven workers (group I) occupationall...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1993-01-01 00:00:00
abstract::The exposure to benzidine under old production conditions, during start-up and at normal work in the new benzidine production division in one of the plants in Poland was compared. In comparison with the old production conditions, in the automatized production process airborne benzidine concentrations were 10-fold lowe...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1980-01-01 00:00:00
abstract::The study involved 461 building workers exposed to ashes, cement and ash-cement mixtures in direct production and at auxiliary posts (fitters, welders, mechanics, electricians etc.). In addition, all those workers were exposed to lubricants ans machine oils, as well as anti-adhesive oils used to lubricate moulds. All ...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1989-01-01 00:00:00
abstract::Individual exposures to CS2 of 31 workers in a viscose rayon plant were examined by personal continuous air sampling and two versions of iodo-azide test (chronometric and titrimetric methods). The obtained results indicate that during occupational exposure there is no practical correlation between 8-hours time-weight ...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1982-01-01 00:00:00
abstract::The acetylcholinesterase activity of erythrocytes was investigated and compared with cholinesterase activity of the blood plasma in rats exposed to elevated temperature of the environment. The rats were kept in a thermic chamber with regulated temperature, forced air flow and controlled moisture of 55-19%. The applied...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1984-01-01 00:00:00
abstract:OBJECTIVES:The aim of the study was to assess the microbiological air quality at the selected municipal waste landfills. MATERIALS AND METHODS:The study was conducted during the summer at two municipal landfills. Air samples were collected on agar plates. The evaluation was based on the concentration levels of airborn...
journal_title:Medycyna pracy
pub_type: 临床试验,杂志文章
doi:
更新日期:2006-01-01 00:00:00
abstract::In order to spread in occupational medicine the simple screening test allowing to detect the alpha-1-antitrypsin deficiency, the conformability of four procedures with the method of radial immunodiffusion has been analysed. From the received data it results that for the preliminary diagnostics of deficiency in mass ex...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1977-01-01 00:00:00
abstract::The study of T-cell subpopulation: T CD3+, T CD4+, T CD8+; NK CD16+ and B CD19+ cells as well as of serum concentrations of immunoglobulins G, A, M, E, complement components C3c and C4, total circulating immune complexes (CIC), CRP, haptoglobin, ceruloplasmin and transferin, was carried out in 16 males, smokers and no...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract::26 men, aged 22-57, with various length of employment in xanthate plant, where they have been exposed to CS2, were subjected to laboratory examinations aiming to find out the effects of this substance on their health state. These studies had been produced by measurements of CS2 concentration in the air of work-posts, ...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:1977-01-01 00:00:00
abstract::Noise is one of the most common physical risks in the workplace. Long term exposure to its high levels (above 80-85 dB) can pose a significant threat to health of workers, including hearing loss. Noise can also be a burdensome factor hampering work, causing stress and various health problems. In the European Union abo...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:2012-01-01 00:00:00
abstract:BACKGROUND:Self-efficacy refers to different spheres of human functioning and to different tasks, including teaching activity. It is regarded as an important personal resource related to coping with stress. This paper was aimed at presenting psychometric properties of the Norwegian Teachers Self-Efficacy Scale (NTSES),...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:10.13075/mp.5893.00569
更新日期:2017-10-17 00:00:00
abstract::Work in a fire-brigade is very often associated with exposure to traumatic events. Some firefighters manifest post-traumatic stress disorder (PTSD) symptoms. In spite of PTSD development, firefighters have to perform various tasks according to their responsibilities. The paper addresses the problem of the relationship...
journal_title:Medycyna pracy
pub_type: 杂志文章
doi:
更新日期:2001-01-01 00:00:00
abstract::The authors present the major sources of formaldehyde, and discuss the incidence of contact allergy to this compound in Poland and throughout the world. The attention was turned to an increasing trend in the incidence of allergy in question, as well as to the problem of cross-sensitization to other chemical compounds ...
journal_title:Medycyna pracy
pub_type: 杂志文章,评审
doi:
更新日期:1998-01-01 00:00:00