Effects of Clothing Structural Factors on Electromagnetic Radiation Protection

2011 ◽  
Vol 175-176 ◽  
pp. 454-459
Author(s):  
Li Li Zhang ◽  
Yan Chen ◽  
Xiao Yu Liu
Keyword(s):  
Electromagnetic Radiation ◽  
Electromagnetic Waves ◽  
Three Dimensional ◽  
Simulation Software ◽  
Structural Factors ◽  
Shielding Effectiveness ◽  
Actual Measurement ◽  
Safety And Health ◽  
Protective Performance ◽  
The Impact

With people's increasing awareness of safety and health, the demands of protective clothing for electromagnetic radiation are gradually increased. The influences of clothing structural factors on protective performance for electromagnetic radiation are studied in this paper. The shielding effectiveness (SE) of fabrics has been tested according to the SJ20524-1995 standard. Meanwhile, according to the measured conditions of fabrics, a simulation model of testing fabric is established by the three-dimensional electromagnetic simulation software Ansoft HFSS to simulate the influences of clothing structural factors on the electromagnetic protective performance under the irradiation of electromagnetic waves at different frequencies. The impact of the length of clothing seams, the size and shape of clothing openings, and the change of clothing layers on the electromagnetic protective performance have been simulated and analyzed in detail. The results show that the simulation results are basically identical with the actual measurement results, and the model of testing fabrics can be applied for the researches on the protective performance for electromagnetic radiation. The study also shows that both seams and openings of clothing will reduce the shielding ability of clothing to electromagnetic radiation, and the change of clothing layers also affects the electromagnetic protective performance of clothing greatly. The results of this article can provide references for the design of electromagnetic shielding clothing, and effectively reduce the adverse effects of clothing structural factors on the protective performance of clothing.

scholarly journals Hygienic assessment of the impact of 5G/IMT-2020 communication networks on public health (literature review)

2021 ◽  
Vol 100 (9) ◽  
pp. 929-932
Author(s):  
Anna M. Egorova ◽  
Lydiya A. Lutsenko ◽  
Anna V. Sukhova ◽  
Vyacheslav V. Kolyuka ◽  
Rustam V. Turdyev
Keyword(s):  
Public Health ◽  
Radio Frequency ◽  
Electromagnetic Radiation ◽  
Communication Networks ◽  
Biological Effects ◽  
Three Dimensional ◽  
Cochrane Library ◽  
Pubmed Search ◽  
The Cochrane Library ◽  
The Impact

The program “Digital Economy of the Russian Federation” approved the Concept for the creation and development of 5G / IMT-2020 networks. The development of 5G communications will significantly impact the implementation of many innovative projects and initiatives: the Smart City project, Unmanned Transport, etc. Along with significant technical advantages compared to previous generations of communication (2G, 3G, 4G), 5G technology has completely different emitting characteristics: more emitting elements, signal modulation, three-dimensional beam, the ability to control the beam, SHF (ultra-high) and EHF (extremely high) radio frequency ranges and centimetre and millimetre wavelengths of electromagnetic radiation. Therefore, it is becoming an especially urgent problem to ensure exposure to the human body of non-ionizing electromagnetic fields of the radio frequency range (30 kHz-300 GHz). The authors searched the literature on the biological effects of 5G cellular communications and electromagnetic radiation in the centimetre and millimetre ranges using the appropriate keywords in PubMed search engines, Scopus, Web of Science, Medline, The Cochrane Library, EMBASE, Global Health, CyberLeninka, RSCI and others. There is currently tentative and conflicting evidence on the impact of 5G. The rapidly growing density of wireless devices and antennas (considering future 5G networks) increases the public health risk from exposure to RF EMFs as the penetration depth for 5G EHF radiation is only a few millimetres. At these wavelengths, resonance phenomena are possible at the cellular and molecular levels, particularly concerning stimulating SHF and EHF oxidative processes and damaging DNA. The influence of the millimetre range of RF-EMF is poorly understood; oncological and non-oncological (impact on the reproductive, immune systems, etc.) effects are possible. Using numerical simulation methods of EMF radiation resonances on insects, Thielens A et al., 2018, found a significant overall increase in the absorbed RF power at a frequency of 6 GHz and higher than a frequency below 6 GHz.

scholarly journals Electromagnetic radiation of oscillating thin films

2019 ◽  
Vol 30 ◽  
pp. 06004
Author(s):  
Alexander V. Kharlanov
Keyword(s):  
Thin Films ◽  
Numerical Simulation ◽  
Electromagnetic Radiation ◽  
Electromagnetic Fields ◽  
Electromagnetic Waves ◽  
Three Dimensional ◽  
Cell Group ◽  
Exchange Of Information ◽  
Dimensional Cell

This paper deals with the electromagnetic fields generated by charges moving with the membrane. The numerical simulation of electromagnetic radiation of oscillating three-dimensional cell it is carried out. The issues of cell group radiation are also considered. Dependences of the field on distance and time are presented. A hypothesis about possible exchange of information between cells by means of electromagnetic waves is made.

A Study on the Anti-Electromagnetic Radiation Performance of Fabric with Silver-Plated Fibers

2011 ◽  
Vol 332-334 ◽  
pp. 878-881
Author(s):  
Hong Xia Zhang ◽  
Xian Xian Wu ◽  
Rong Tao ◽  
Li Jia Shi ◽  
Cheng Yan Zhu ◽  
...  
Keyword(s):  
Electromagnetic Radiation ◽  
Electromagnetic Waves ◽  
Experimental Results ◽  
Radiation Property ◽  
Shielding Effectiveness ◽  
Better Than

In order to study on the anti-electromagnetic radiation performance of fabrics with silver-plated fibers, five sets of samples with polyester DTY and silver-plated nylon filament were manufactured for the experiment. The anti-electromagnetic radiation property of fabrics was tested with Flange coaxial method. The influence of different silver-plated fiber contents on the anti-electromagnetic radiation performance of fabrics was analyzed in this paper. The experimental results show that when silver-plated fibers are distributed by a network, anti-electromagnetic radiation performance of fabrics is better than that the silver-plated fibers are distributed only along the warp in fabrics. Meanwhile, the anti-electromagnetic radiation performance of fabrics improves as the increasing of the silver-plated fibers content. The anti-electromagnetic radiation performance of fabrics increases slowly when silver-plated fibers content is from 40% to 80%. The shielding effectiveness of fabrics for 10MHz~1000MHz electromagnetic waves increases not obviously when silver-plated fibers content is more than 80%, but that for 3000MHz is still rising. The anti-electromagnetic radiation performance of fabrics is the best when silver-plated fibers content reaches to 100%.

scholarly journals Professional Mobility and “Objective” and “Subjective” Satisfaction. a Non- Linear Analysis from the Theory of the Three-Dimensional Spiral of Sense in Population of Doctors

2016 ◽  
Vol 6 (1) ◽  
pp. 52
Author(s):  
Miriam Aparicio
Keyword(s):  
Social Representations ◽  
Three Dimensional ◽  
Professional Status ◽  
Structural Factors ◽  
Professional Careers ◽  
Professional Mobility ◽  
National University ◽  
Micro Level ◽  
The One ◽  
The Impact

This work goes along the lines of the author’s research (1995-2016) on professional careers and models bearing causes and effects regarding sustained interaction (core, psychosocial, institutional and structural factors). The aim of this paper was analyze, through the doctors’ social representations, the levels of satisfaction evidenced by those who have advanced professionally to the highest positions within the scientific (or other) system. The hypothesis states that the relation is not linear but inverse. Satisfaction would not increase according to the Professional Status. We consider here, on the one hand, the insufficient Professionalization and the increasing demands from the market; and on the other, the impact structural limits have on the micro level. The methodology used was quanti-qualitative (semi-structured questionnaires, interviews, and hierarchical evocations). The population consisted of doctors (2005-2012) from the National University of Cuyo, in Argentina and the Cnam (France) of different courses of study. The results confirm the hypothesis. As regards what was observed among those who advanced professionally, the increase on the growing market demands along with the lack of institutionalized means in order to reach goals, result in lower satisfaction. This is interpreted from the theory of the author, which involves 3 levels (macro-meso-micro-macro) (Aparicio, 2015 a, b). We also consider the theories of anomie and of the expectancy of valence (Feather - Davenport). Findings along this line were also seen in studies with scientists (Aparicio, 2014). The results propose a revision in the prevailing working conditions and police: satisfaction acts on subsystems and consolidates them.

The wave structure of monochromatic electromagnetic radiation

1987 ◽  
Vol 409 (1836) ◽  
pp. 21-36 ◽  
Keyword(s):  
Electromagnetic Radiation ◽  
Electromagnetic Waves ◽  
Plane Waves ◽  
Three Dimensional ◽  
Wave Structure ◽  
Single Frequency ◽  
Singularity Index ◽  
Left Handed ◽  
General Field ◽  
Structurally Stable

The paper considers a general field of electromagnetic waves of a single frequency and identifies the salient structurally stable features of the three-dimensional pattern of polarization. The approach is geometrical rather than analytical, and it differs from previous treatments of this kind by being applicable even when the constituent plane waves are travelling in all directions. Lines and surfaces exist where the electric or magnetic vibration ellipse is singular. The field is divided into right-handed and left-handed regions by ‘T surfaces’ , the electric and magnetic T surfaces not being coincident. Lying in the T surfaces are ‘L T lines’ where the vibration is linear, and cutting through the T surfaces are ‘C T lines’ where the vibration is circular. Both kinds of lines are surrounded by characteristic patterns of vibration ellipses, which provide a singularity index, ± 1 for L T and ± ½ for C T . The analysis is applicable in a cavity, but a loss-free resonating cavity represents a highly degenerate case.

scholarly journals Professional Mobility and “Objective” and “Subjective” Satisfaction. a Non- Linear Analysis from the Theory of the Three-Dimensional Spiral of Sense in Population of Doctors

2016 ◽  
Vol 2 (4) ◽  
pp. 52
Author(s):  
Miriam Aparicio
Keyword(s):  
Social Representations ◽  
Three Dimensional ◽  
Professional Status ◽  
Structural Factors ◽  
Professional Careers ◽  
Professional Mobility ◽  
National University ◽  
Micro Level ◽  
The One ◽  
The Impact

This work goes along the lines of the author’s research (1995-2016) on professional careers and models bearing causes and effects regarding sustained interaction (core, psychosocial, institutional and structural factors). The aim of this paper was analyze, through the doctors’ social representations, the levels of satisfaction evidenced by those who have advanced professionally to the highest positions within the scientific (or other) system. The hypothesis states that the relation is not linear but inverse. Satisfaction would not increase according to the Professional Status. We consider here, on the one hand, the insufficient Professionalization and the increasing demands from the market; and on the other, the impact structural limits have on the micro level. The methodology used was quanti-qualitative (semi-structured questionnaires, interviews, and hierarchical evocations). The population consisted of doctors (2005-2012) from the National University of Cuyo, in Argentina and the Cnam (France) of different courses of study. The results confirm the hypothesis. As regards what was observed among those who advanced professionally, the increase on the growing market demands along with the lack of institutionalized means in order to reach goals, result in lower satisfaction. This is interpreted from the theory of the author, which involves 3 levels (macro-meso-micro-macro) (Aparicio, 2015 a, b). We also consider the theories of anomie and of the expectancy of valence (Feather - Davenport). Findings along this line were also seen in studies with scientists (Aparicio, 2014). The results propose a revision in the prevailing working conditions and police: satisfaction acts on subsystems and consolidates them.

scholarly journals Analyses Regarding Possible Effects of Electromagnetic Waves Emitted on Agricultural Productions

2021 ◽  
Vol 8 (1) ◽  
pp. 43
Author(s):  
Lavinia Popescu ◽  
Adela Sorinela Safta
Keyword(s):  
Electromagnetic Radiation ◽  
Empirical Research ◽  
Electromagnetic Waves ◽  
Quantitative Methods ◽  
New Technologies ◽  
Technical Solution ◽  
Agricultural Systems ◽  
Wide Range ◽  
Digital Agriculture ◽  
The Impact

This paper aims to highlight in a unique way the effects on sustainable agricultural systems due to the global growth of the development of the communications system. From the very beginning, we discussed the disruptions of climate change and, in particular, the risk of disaster, which causes long academic debates regarding electromagnetic radiation. During the study, we conducted empirical research using the wide range of receptors and a detailed determination bridge; we used quantitative methods to collect the processes and analyze the data and information incorporated to formulate observations and conclusions. The aim of this paper is to highlight an assessment for obtaining an answer to the possible causes of climate disturbances in agriculture, given the epistemic uncertainty. Mainly, we will reflect on the effects that interfere with the level of electromagnetic radiation produced by antennas. Opening advanced technologies with new satellite capabilities is expensive, so now, the density of high-power data transmissions useful in digital agriculture is the technical solution of operators. Our empirical research experimentally analyzes the data we collect in the statistical monitoring of electromagnetic waves, investigating to what extent the electromagnetic radiation affects agricultural systems concerned with trying to sequester C from the soil and reduce greenhouse effects. The paper defines and presents the evolution of the impact of new technologies developed in order to facilitate the implementation of intelligent agricultural solutions, admitting that the opening of new technologies facilitates the creation of the economically and socially interconnected global community (McLuchan, 1973). Taking into account the intensification of the use of digital agriculture, the analysis proposed for research is a topic that needs updating, and in this sense, it is necessary that this research be analyzed from environmental perspectives.

scholarly journals Cause analysis of pipeline vibration in natural gas station

2021 ◽  
Vol 329 ◽  
pp. 01083
Author(s):  
Jia Wu ◽  
Shuai Kong ◽  
Li Xia ◽  
Ping Tang
Keyword(s):  
Natural Gas ◽  
Structural Characteristics ◽  
Three Dimensional ◽  
Element Model ◽  
Simulation Software ◽  
Measuring Point ◽  
Acceleration Sensors ◽  
Gas Station ◽  
Pipeline Vibration ◽  
The Impact

Natural gas station is an important part of the whole natural gas pipeline transmission system, in which the pipeline vibration is a hidden danger that cannot be ignored for the safe operation of the station. In view of the severe vibration of the pipeline in a natural gas station of an enterprise, the vibration acceleration sensors are used to test the vibration of each measuring point under different working conditions, and then the three-dimensional finite element model of the pipeline is established by using numerical simulation software to study its structural characteristics and gas column characteristics. Through the analysis of field test results and simulation results, it is found that there are two main vibration frequencies in the pipeline: 116.75 Hz and 123.0 Hz. The former is caused by the resonance between the gas column frequency and the natural frequency in pipe B; The latter is due to the impact of the gas column force in pipe A on pipe B.

scholarly journals EFFEK SAMPING PENGGUNAAN PONSEL

2015 ◽  
Vol 17 (4) ◽  
Author(s):  
Enny Enny
Keyword(s):  
Electromagnetic Radiation ◽  
Mobile Phone ◽  
Mobile Phones ◽  
Electromagnetic Waves ◽  
Cell Phone ◽  
Cell Phones ◽  
Mobile Users ◽  
A Cell ◽  
The Impact ◽  
Cell Phone Radiation

Enny, in this paper explain that many mobile phone users around the us, but only a portion of the concerned about the dangers of cell phones. This paper was compiled to determine the impact and solutions of cell phone radiation. Mobile phones emit electromagnetic waves which will affect the surrounding environment. Based on existing information, cell phone radiation is thought to cause cancer. Waves emitted from mobile phones over the air is causing electromagnetic radiation. Potential disrubtion of health consequences of radiation electromagnetic field has become an issue which examined till now, so found a variety of health disorders as a result of mobile phone users that includes the impact of mild and severe impact. Experts have discovered some efforts to minimize the effects of cell phone radiation on health of mobile phone users. Every user should know the dangers of mobile phone users. Radiation caused cell phone not only arise when used, but when putting a cell phone in your Pocket can also be exposed to any radiation. Therefore, mobile users need to know how to use a cell phone. Users should pay attention to the level of radiation caused by cell phones, so that the influence of electromagnetic radiation on health can be scaled down for mobile users. Keywords: side effects of cell phone use

Rockfall on the Slope of the Embankment of Finite Element Analysis of the Impact of the Impact

2011 ◽  
Vol 261-263 ◽  
pp. 1119-1123
Author(s):  
Zi Jian Wang ◽  
Sheng Xie Xiao
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Three Dimensional ◽  
Road Construction ◽  
General Purpose ◽  
Simulation Software ◽  
Initial State ◽  
Element Analysis ◽  
The Road ◽  
The Impact

This article in a typical road slope model as an example, through large-scale general-purpose finite element simulation software ANSYS/LS-DYNA rockfall on the slope of the roadbed impact for three-dimensional dynamic analysis in the roadbed, slope geological parameters and falling stone initial state is not at the same time on the roadbed impact the results of comparative analysis. The result is the mountain slope of the road construction project provides reference.

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