Introduction. The Russian telecommunications industry is on the threshold of introducing 5G/IMT-2020 (5G) mobile communications. The expected technological innovations of the new generation standard will lead to an increase in the capacity of mobile operators ‘ networks, data transfer speeds, the emergence of new scenarios for the use of mobile communications and the development of innovative digital services. This will contribute to economic growth by increasing labour productivity, automation and introducing new technologies in various economy and human activity areas. At the same time, the electromagnetic environment (EMO) in the areas where people stay will also change. The purpose of the study is to consider the unique features of the architecture of the 5G network to predict the impact on the population of electromagnetic fields (EMF) of the radio frequency (RF) range. Material and methods. The study is analytical. The information base of the research was Russian strategic documents on the development of 5G technologies, articles published in domestic and foreign journals. Results. The primary input data for the construction of 5G networks are presented, allowing us to evaluate EMO and identify the new technology features that are significant in terms of the impact of RF electromagnetic fields on the population. The 5G network uses previously unused RF bands and new types of antennas. With the introduction of 5G, the density of base stations (BS) and access points will significantly increase, the heights of BS antennas will decrease, and the spatial and temporal characteristics of electromagnetic radiation will change substantially. Conclusion. The architecture of the 5G network differs significantly from the mobile communication standards of previous generations. The introduction of 5G networks will lead to a significant change in the electromagnetic background in the environment. An urgent task is to develop a theory of hygienic regulation of RF EMF for the population in a complex electromagnetic environment with simultaneous operation of 5G networks and previous generations and new approaches to determining the levels of EMF in the environment by computational and instrumental methods.
The problem of ensuring safety of electric and magnetic fields (EMF) of extremely low frequencies (ELF) is resulted from the development of the first low-frequency generators producing penetrating effect and causing negative biological outcomes. World power resources are doubling every 10 years, and ELF EMF are generated around by such sources. The number of sources on the scale of application, power and design diversity significantly exceeds those generating EMF in other frequency ranges. The population is exposed to 50 Hz ELF at work, in electric transport, in residential and public buildings, in residential areas. ELF EMF was found both to “pollute” the environment, be an environmental health risk factor, and affect negatively the health with potential long-term outcomes. Development of various methods and means of protection against the effect of ELF EMF remains relevant today. Limitation (regulation) of the effect of the factor both in terms of intensity and exposure is the most effective protection. Epidemiological studies to identify the relationship between exposure to ELF magnetic fields (MF) and carcinogenesis are on-going. A task panel group of research experts, established by WHO in 2005, conducted a routine procedure to assess health risks resulting from exposure to ELF MFs and, in particular, cancer and considered them to lack evidence. However, the significance of the data obtained was noted to be reduced due to procedural problems, potential systematic error of assessment. The problem remains unsolved. Research using various types of monitoring: social and hygienic, sanitary and epidemiological, is going on. Spatio-temporal monitoring of 50 Hz ELF MF in enclosed spaces of residential and public buildings, where a variety of equipment, devices, power supply systems, generating different MF levels, is an important area. The population is exposed to these conditions most of the day. Monitoring will allow assessing electromagnetic load at short-term and long-term exposures.
Summary. Introduction: Location of weather surveillance radars near settlements, in residential areas and on airport premises makes it important to ensure safe levels of electromagnetic fields (EMF) when operating these radio transmitters. EMF maximum permissible levels for weather radars developed in the 1980s are outdated. Our objective was to analyze modern weather surveillance radars to develop proposals for improvement of radar-generated radiofrequency field monitoring. Materials and methods: We studied trends in meteorological radiolocation and technical characteristics of modern weather radars for atmospheric sensing and weather alerts, analyzed regulations for EMF measurements and hygienic assessment, and measured radiofrequency fields produced by weather radar antennas in open areas and at workplaces of operators. Results: We established that modern types of weather radars used in upper-air sensing systems and storm warning networks differ significantly in terms of technical characteristics and operating modes from previous generations. Developed in the 1980s, current hygienic standards for human exposures to radiofrequency fields from weather radar antennas are obsolete. Conclusions: It is essential to develop an up-to-date regulatory and method document specifying estimation and instrumental monitoring of EMF levels generated by weather radars and measuring instruments for monitoring of pulse-modulated electromagnetic radiation.
Introduction: The increase in time people spent in rooms of various functional purposes makes special demands on the quality of artificial lighting, which increasingly compensates for the lack of daylight. In 2021, Russian Sanitary Regulations and Standards SanPiN 1.2.3685-21 came into force setting new requirements for qualitative and quantitative characteristics of artificial lighting in residential and public buildings, thus necessitating improvement of instrumental control methods. Objective: To develop and substantiate requirements pertaining to organization of instrumental control, procedure and conditions for measuring lighting indicators in the premises of residential and public buildings in order to control their compliance with the updated hygienic standards. Materials and methods: We reviewed 17 regulatory documents and guidelines containing the requirements for illumination and measurement of its parameters and analyzed more than 30 proposals for lighting assessment received from 28 territorial bodies and institutions of the Russian Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor). We also considered ten main issues concerning instrumental control of lighting suggested for discussion at the meetings on activities and assignments of physical laboratories of Rospotrebnadzor Centers for Hygiene and Epidemiology in 2018–2020 and issues of illumination measurement and assessment in different types of buildings posing challenge for specialists of the Inspection Body in the course of sanitary and epidemiological expert examination of measurement results. Results: We have determined method approaches to organizing and taking measurements of lighting indicators and specified the choice of monitored parameters, measuring points and conditions. Conclusion: When developing guidelines for measuring and assessing lighting inside and outside residential and public buildings, it is necessary to systematize the requirements of valid method documents, eliminate existing contradictions, and determine the choice of indicators, measuring points and conditions to be monitored.
Contact welding is one of the most common types of welding. According to the technological method of obtaining joints, contact welding can be spot, relief, butt, suture. Spot contact welding a high productivity. Specialists use spot welding more often than other types of welding. The formation of permanent joints of materials occurs as a result of electric heating and deformation during compression. Workers warm up the products with pulses of alternating, direct or unipolar current of industrial frequency 50 Hz. Researchers have registered adverse factors at the welder's workplace that have an impact on health. These are high temperature, splashes and metal vapors, pulsed magnetic fields (PMF) of industrial frequency 50 Hz. The study aims to explore the levels of pulsed magnetic fields of industrial frequency of 50 Hz at workplaces during the operation of contact spot welding installations. The study included the study of the technology of contact spot welding, instrumental measurements and hygienic assessment of the levels of PMF of the industrial frequency of 50 Hz at the welders' workplaces during the operation of equipment in normal mode. Specialists have performed instrumental measurements of PMF levels with a TP2-2U milliteslameter during operation of three models of semi-automatic welding machines based on spot welding installations. The researchers recalculated the measured levels of magnetic field induction to the maximum operating current (Imax) possible during the technological process. Instrumental measurements showed that the magnetic field strength at the welders' workplaces depended on the type of installation, the distance from the radiation source, the localization of exposure, and welding of specific products. Experts registered the highest levels of magnetic fields in the arm area from 1096.0 to 5512.0 A/m. At the maximum operating current, the magnetic field strength can reach 13 678.0-11 024.0 A/m. The study showed that the intensity of pulsed magnetic fields of industrial frequency 50 Hz in the workplace can exceed the maximum permissible levels. To protect workers, it is necessary to limit the time of exposure to magnetic fields. Limitations. The studies are preliminary in nature and have limitations on the scope of the study.
Findings of comprehensive assessment of occupational health risks in high-carbon ferrochrome production workers are reported. Groups of occupation- and employment duration related risk according to the general morbidity rate depending on the age and employment duration among smelters, blast-furnace keepers, cinder-men, batchers, crane operators, ferroalloy crashers, electrode operators and other smelter workers were identified. Hygienic studies covered the measurement of the following physical and chemical workplace factors: noise, whole-body and local vibration levels, electromagnetic fields and microclimate parameters (temperature, relative humidity, air speed, heat radiation intensity, environmental heat load index), artificial illumination, aerosol concentrations in workplace air and in neutral points of workrooms, average shift aerosol concentrations being calculated, and chemicals concentrations: calcium oxide, magnesium oxide, ferric iron oxide, chromic oxide, chromium anhydride, aluminium oxide, nitrogen dioxide, sulphur dioxide and carbon monoxide. Time-keeping study to evaluate the hardness of the working process and intensity in main occupations was carried out. Our studies revealed working conditions of major smelter occupational groups to be were evaluated as harmful and dangerous: 3rd class, 2nd degree. Microclimate (heat radiation, low ambient air temperatures, noise and environmental dust pollution were reported to be the most unfavorable working conditions; the hardness of the working process heaviness of all major occupational groups were classified as 3rd class, 1st degree. Working conditions of control group workers unexposed to harmful occupational factors of smelter shop were estimated as allowable. Findings on the risk for the gain in the morbidity rate (annual gain in the risk) depending on age and employment duration for the period of 2007-2016 are reported. The direct statistically reliable relationship between the increased disease incidence on age and employment duration is revealed; annual gain in the disease incidence rate is shown.
Health risk assessment and prediction of the disease occurrence among workers of metallurgical enterprises is warranted by the current state of industrial development. The aim of the study was to select criteria to improve reliability of the assessment of professional risk in the conditions of a reduction in the number of employees in certain occupational groups. Methods. The working conditions of employees of the main professional groups of the smelting shop on the basis of a modern metallurgical enterprise for the production of high-carbon ferrochrome were studied. Priority harmful factors have been identified for assessing the risk of workers' health - microclimate, noise, air pollution with aerosols of mainly fibrogenic effect. The occupational health risk of workers has been estimated according to morbidity indicators with temporary disability depending on age and length of service. Results. A direct statistically significant etiological relationship between working conditions and the incidence of smelting shop workers was revealed. The results of the analysis of disease incidence risk growth rate depending on age and employment duration (annual increase in risk) of employees are presented. Annual growth of disease incidence cases depending on employment duration (0,2 ± 0,03) is significantly higher than depending on the age (0,03 ± 0,005). An express assessment has been developed to predict the risk of exposure to harmful factors for this production, which can be used to improve measures for managing professional risk in the metallurgical and other industries. An express assessment has been developed to predict the risk of exposure to harmful factors for this production, which can be used to improve measures for managing professional risk in the metallurgical and other industries. Conclusion. A high occupational risk of smelting workers in the production of high-carbon ferrochrome indicates the influence of harmful production factors on the incidence rates from the first years of work, which should be taken into account when conducting preventive measures.
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