Электромагнитные излучения базовых станций сотовой радиосвязи как фактор опасных воздействий на человека
The influence of electromagnetic radiations of base stations of radio communication on a person subjected to irradiation by fields produced by radio networks of cellular networks is considered. A comparison is made between the admissible levels of radiation contained in domestic and foreign regulatory documents. The energy flux densities are calculated at four typical points near the base station of cellular communication.
The work is devoted to the protection of humans from the effects of electromagnetic radiation. Today it is necessary to formulate the basic principles of electromagnetic bezopvsnosti which basis is hygienic regulation of electromagnetic radiation and carrying out sanitary control of the sources of the izlucheniya.V formulated conditions and given the method of their implementation, taking into account the maximum permissible levels, while exposure from multiple sources EMI RF
The scientific significance of the scientific results outlined in the work is to investigate the mechanisms of formation of contact radio interference that arise as a result of the electromagnetic field of radio transmitters located on aircrafts on current-carrying mechanical contacts of structures with nonlinear and time-varying resistances, as well as the formation of electromagnetic interference. The scientific results obtained as a result of the studies showed the mechanisms of formation of a flowing current caused by induced EMF, along the elements of the airplane structure, which lead to the formation of a radiation mechanism by these elements of the secondary electromagnetic field interacting with the primary irradiating electromagnetic field of the radio transmitter. By registering and analyzing the spectral composition of the electromagnetic radiation of mechanically connected elements of the ES structure, it is possible to control the quality of assembly of the structural elements. Carrying out complex diagnostics based on measuring the spectral composition of the whole product, having the measuring antennas around the product under investigation it is possible to conduct reliable estimates of the quality of assembly of both individual mechanical elements and the entire ES design as a whole. The studies carried out in the work can be put into the development and study of a contactless express method for assessing the quality of assembly and installation of structures. The method is based on the registration and analysis of artificially generated contact jamming under the influence of mechanical vibrations and a high-frequency harmonic electrical signal on the elements of aircraft structures forming a phase-amplitude-modulated oscillation circuit, which are recorded by a spectrum analyzer or a FAM receiver or AM oscillations. In this case, the levels of its spectral components are measured with a change in the frequency of mechanical influences in the range determined by the operating conditions. The measured level of the spectral components of the emitted amplitude-modulated oscillations is compared with the level of the spectral components of the signal emitted by the design of the reference block with given mechanical parameters and having a standardized level of contact interference. The main result of these studies allows us to use the considered in the field of electromagnetic compatibility (EMC) as an undesirable phenomenon, the formation of contact jammers has been used successfully to evaluate the mechanical properties of structures (assessing the quality of their assembly) of a wide variety of aircraft technical devices and devices, including the quality of assembly and installation related to the tightening torque of fasteners).
The problem of protecting humanity from the effects of electromagnetic and ionizing radiation (EMR and AI) is now becoming increasingly important, because The number of sources of EMP and AI increases and their capacities increase. In particular, the use of electronic means (computers, televisions, radiotelephones, office equipment, household appliances, etc.) is growing, and the number of people who have health problems associated with exposure to this type of radiation proportionately grows. Goes into the category of global problems facing humanity. The book consists of three sections. The first section is devoted to electromagnetic radiation produced by industrial installations and household appliances. In the second section, ionizing radiation of both natural and artificial origin is considered. The third section considers the nature of torsion fields. The influence of all these radiations on humans and biological objects is shown. The methods and means of measuring these impacts are described. Recommendations for protection against electromagnetic and ionizing radiation are given. The book can serve as a training tool for studying courses "Life Safety", "Technospheric Security", "Environmental Protection" in higher and secondary educational institutions. It can be useful to specialists involved in the design and operation of devices that can be sources of dangerous electromagnetic and radiation radiation, as well as for specialists in preventive medicine, labor protection services, etc
Basic provisions are presented in article concerning safety concerning electromagnetic radiations when functioning radio-electronic means of a radio coherent and radar profile of objects sea infrastructure. The description of scientific and methodical approach and program realization of an assessment of safety is given in objects of sea infrastructure.
The article demonstrates the change in the spectrum of informative signals during the simulation of work (reading or writing information) of a hard disk drive in its different areas with the help of specialized software from the composition of software and hardware complexes for the engineering research and the research of a transient electromagnetic pulse emanation standard in order to detect possible frequencies of informative signals (which are likely to leak the processed information including limited distribution). Search for informative signals on a 250 GB hard disk with a SATA 2 interface is performed using the software-defined USRP B210 system and two omni-directional antennas in the range from 34.5 to 6000 MHz. The study shows the imperfection of existing test programs for conducting special studies of hard drives. The range of informative signals varies depending on the location of the file that is accessed, which is not taken into account in the test programs.
Mobile (cellular) networks represent a fast evolving research field that take advantages of recent technological advances such as Big Data and distributed computing to provide extensive network monitoring for network operation planning and management purposes. Challenges related to making use of the large volume of streaming data generated by mobile networks include extracting relevant elements within massive amounts of signals possibly spread across different sources (data bases), reducing dimensionality, summarizing dynamic information in a comprehensible way and displaying it for interpretation purposes. The adequate network modeling provides both statistical data of network performance and important networking QoS related insights. Comprehensible mobile network information is needed that uncovers the role of each attribute and variable. To harness the complexity of mobile network data and to extract relevant information a dedicated distributed computing platforms and Big Data frameworks are needed, able to discover and deal with the inherent properties and complexities of these datasets. Smart network monitoring service plays a central role here.
In the last few years there has been a growing interest in route building oriented mobile applications with the following features of navigation and sending timely notifications about arrival. Despite the large body of existing knowledge on navigational services, there has been an important issue relative to positioning accuracy. The paper discusses a possible solution to comparison problem, which is linked to the determination of the closeness to destination metro station through finding a difference between user’s current coordinates and fixed-point coordinates. With this end in view, fuzzy logic approach is used to develop Routes Recommender System (RRS) that utilizes linguistic variables to express the vague and uncertain term ‘closeness to…’. The paper provides detailed explanation of each variable considered in the fuzzy inference system (FIS), set of fuzzy rules in line with graphical representation of system’s output. Based on Mamdani model, we propose a set of test cases to check maintainability of the model and provide a description about received results. At a later time, an Android-based mobile application aimed at public transport route building will be developed whose notification system will be based on our model`s implementation presented. It should be emphasized that the paper examines potentials of the modeling approach based on interval type-2 fuzzy sets (IT2FS) that attract much attention these days in various research studies and conventional Mamdani fuzzy inference system (MFIS) as applied to real and rather topical problem. The significance of developing such models may be of a high demand for appropriate representation of factors that are inherently vague and uncertain. Hence, this study may also contribute to future research on similar topics.