Types of electromagnetic radiations

INFLUENCE OF THE ELECTROMAGNETIC FIELDS AND RADIATIONS ON ORGANISM OF MAN

Purpose of work

To learn|studies,learns| influence on the organism of the person of the varied|various| electromagnetic radiations. To familiarize with methods and facilities of defence|protection| from the negative influencing of such radiations; to get practical skills by calculation of efficiency of |wins| protection |protection| of protective screens.

2 Key positions|rules|

Types of electromagnetic radiations

All EMF| and radiation divides into natural and anthropogenous. Environment surrounding us always was under influence of electromagnetic fields. These fields are called background radiation, and caused by nature With the development of science and technology background radiation significantly increased. That is why|that is why| the electromagnetic fields which|what| can be delivered to|by| anthropogenous considerably exceed a natural background and recently have turned into a dangerous ecological|ecofriendly| factor.

Let's consider from the beginning of the field of a natural origin. Around of the Earth there is an electric field of average tension 130 V/m. It is reduced from mid-latitudes to the poles to the equator, as well as the distance from the Earth's surface Observe annual, daily and other variations of this field. Also, this field is constantly changing under the influence of thunderstorm discharges, deposits and other natural cataclysms.

Also there is the magnetic field of Earth by tension 47,8 А/m and 39,8 А/m on north and south poles accordingly. This field hesitates with the 80- and 11-years cycles of changes, and also more short-term changes for the various reasons, related to sun activity. Also there is a magnetic field 19,9 А/м on magnetic equator. This field sometimes changes under influence of magnetic storms.

Earth constantly is under act of the electromagnetic field that emanates by a sun. Range of frequencies of this radiation 10MHz-10GHz is approximately evened. It is necessary to mark|notes| in general|generally|, that the electromagnetic field of Earth constantly changes through|from,because of| the row|file| of factors, as sun activity, processes in the earthly bowels of the earth and other. In relation to|concerning| the spectrum of sun radiation, he is near a short-wave region|area,domain| and connects|combines| in itself the and ultraviolet infrared. Intensity of this radiation is a permanent|constant| characteristic periodically to change and to be strongly enough increased during the atmospheric flashes.

These fields their lives influence on biological objects at all time. That is why|that is why| in the process of evolution a man adjusted to their influencing and made|produced,produces| ability|power| to ward off the possible damages due to natural factors. However much connection| is researches workers between the flashes of sun activity and changes|changing| of the electromagnetic field that is drawn|caused,called| by this process and some|certain| groups of diseases of people. Also, studying|learning| this phenomenon, scientists noticed the change|changing| of de bene esse-reflex activity of animals within the framework of this process.» Systematic researches in relation to|concerning| influence of the electromagnetic fields on the organism of man began somewhere from 50th.

There is such nomenclature of ranges in obedience to regulation of radio contact:

30-300 kHz|	LF|
300-3000 kHz |	MF|
3-30 MHz	HF|
30-300 MHz	VHF|
300-3000 MHz	UHF|
3-30 GHz|	SHF|
30-300 GHz	EHF|

The electromagnetic fields of low frequency (LF|) often use for heat treatment, high-frequency (HF) - in a radio contact, medicine, television. Circle|circumference| of the field source|spring| zone space: near (area|zone| of induction) and distant (area|zone| of radiation). Depending on the location|disposition| of area|zone| the field descriptions are|appears|: in a near area|zone| is constituent of vector of tension of the electromagnetic field; in distant is power description intensity of fluence power.

2.1.1. Radio waves of high-frequency(HF) and ultrahigh-frequency( UHF |)

Ranges

We will consider the radiation HF and UHF | ranges. The medical inspections witnessed subjective disorders|discords| which are observed|exists| during work: weakness, enhanceable fatigueability, sweating |, somnolence, and also somnipathy|discord|, head|leading| pain|anguish| pains|anguishs|, in the region|area,domain| of heart. Food and sexual reflexes are repressed|depressed| also. Also scientists fixed the changes|changing| of indexes of and carbohydrate proteometabolism, increase of concentration of nitrogen in an organism, and also diminishing of concentration of albumen and increase|rise| of globulin. In addition, fix some|certain| changes|changing| in a blood, namely: increase of amount|quantity| of leucocytes, thrombocytes, and other.

At research of influencing of the electromagnetic fields on the organism of man took under the supervision the test group of people which lived near-by the wireless station. This research gave very interesting|curious| and anxious result: in this control group the amount|quantity| of complaints on a health almost in two times exceeded middle. At research of children|kids| it was found|exposed,shown,displayed| out violation of mental|cogitative| capacity, decline|lowering| of attention through|from,because of| development of the successive|logical| braking and oppression of the nervous system. It was also discovered|exposed,shown,revealed,displayed| that the immune-biological system suffers as a result of|because of,owing to| action|act| of the electromagnetic fields. Origin of sharp and chronic illnesses and functional violations possible also in-process almost all systems of organism. The changes|changing| of activity of the nervous and cardiovascular system have cumulative character|nature|, and not because of|in consideration of,in view of| it at stopping of influencing, and also improvement of terms of labour, as a rule, there is the improvement them

functioning. The protracted|prolonged| influencing of the electromagnetic fields however results in|to| proof|firm| violations and diseases.

2.1.2 Radio waves of extraordinarily high-frequency ( SHF |) range

Activity of influencing of the fields of different|diverse| ranges of frequencies grows with growth|height| of frequency and very in earnest influences in a SHF | range. television and radio stations, and also almost all radiorelay stations, radio-locators works|work| in this range much|richly|, and other. Westering|at sunset| the waves of this range are accepted to name|calls| " microwaves |". The SHF | radiation spreads|widened| within the limits of line-of-sight. On some|certain| areas of range of SHF | wave is dispersed by the molecules of oxygen, atmospheric precipitates, and other, that limits distance of their distribution. In an apparatus, that uses a SHF | range, his|its| use is related|tied| to diminishing of obstacles and top qualities of information transfer than in a UHF | range. But, it should be noted that the modern domestic and corporate equipment idely enough uses a UHF | range exactly. It employs a majority of mobile phones, wireless computer networks, radio trunking and other things. This use of apparatus which|what| works in the ranges of high-frequencies in a direct|immediate| closeness|intimacy,nearness| from a man above all things related|tied| to the danger. Because the radiation of SHF | at absorption by an environment|Wednesday| which|what| is|appears| a bad explorer draws|causes,calls| his|its| heating, very widely use this range in industrial options. Similar|like| options are used in the way of life. Track|trace| to|by| it to make an example of SHF | (microwave) ovens|. That is why|that is why| the recitals of danger of the use of SHF -| stoves have a ponderable warrant sufficiently|enough|. This phenomenon was instrumental|assisted| in creation|making| by the scientists of therapeutic apparatus that is based on properties|virtues| of SHF | radiation. Also it should be noted that exactly through|from,because of| these properties|virtues| of SHF | radiation use for the transmission of energy by a ray|beam| on large|great,big| distances. When examined|considers| the projects of building|construction| of suns power-stations on a околоземній| orbit, exactly this technology was examined|considered| as base for the transmission of the got|received| energy from space|cosmos| on Earth. But a lot of the not decided|solved| technological problems related|tied| to the practical use of this technology stands to it. At the use of SHF | range mostly сфокусують| the radiation in a narrow ray|beam| by aerial of small sizes. Within the limits of this ray|beam| intensity of the electromagnetic field is considerably multiplied, and|but| after his|its| scopes|lines| becomes|stands| barely|hardly,slightly| noticeable. It allows expressly enough to determine areas|zones| which are|appears| dangerous for a health. Sufficiently|enough| many scientists now|presently| concentrate the attention in scientific labours exactly on a SHF | range and his|its| influence on biological objects.

At intensity of the field about 20 ìêÂò/ñì2 there is diminishing of frequency of pulse, decline|lowering| of arteriotony. This action|act| prepotent at people which already fell under the similar|like| irradiation. The electrocardiographies changes|changing| show up with growth|height| of intensity. Then acceleration of pulse, oscillation of volume of blood is marked|noted|. At achievement of mark of intensity in 6ìÂò/ñì2 mark|notes| the changes|changing| in sexual glands, in a blood and is dimness

lens of the eye. Farther|then| can begin to be felt even such frightful symptoms, as breaks of capillaries and hemorrhages in lights and liver.

The postdose notedly influences on fabrics, causes|calls| pains|anguishs| senses|feeling,sentiments|. If intensity exceeds Вт/см2, it draws|causes,calls| the rapid|quick,fast| loss of eyesight. The damage of organs of sight, by the way, shows itself one of the most serious effects of caused|called| by the electromagnetic fields of SHF | range. On low frequencies such effects are not observed|exists|, that is why|that is why| they are|appears| specific exactly for a SHF | range. Degree of damage as a result of|because of,owing to| actions|acts| electromagnetic by the field of SHF | range can be different|diverse| and more frequent depends on intensity of irradiation and time of his|its| action|act|.

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