Combination of the ideas of thetelephone and Radio.Extremely sophisticated Radio.Used to make mobile telephone calls across awide geographic area, served by manypublic cells, allowing the user to be mobile.
Can make and receive telephone calls byconnecting to a cellular network providedby a mobile network operator. Transmit and receive Radio Frequency (RF)signals in order to communicate, i.e. use microwave radiation to communicate.
“If we continue to develop our technologywithout wisdom or prudence, our servant may prove to be our executioner”. - Omar N. Bradley
RADIATIONEFFECTS A part of the radio waves emitted by a mobile telephone handset are absorbed by the human head. The radio waves emitted by a GSM handset can have a peak power of 2 watts, and a US analogue phone had a maximum transmit power of 3.6 watts. The best known measure is SAR (Specific Absorption Rate), which measures the RF power absorbed by the human body.
THERMAL EFFECTS•A typical GSM digital cellular phone operating at a maximum average poweroutput of about 0.25 watts (W) might results in a SAR of about 0.5-1.5 W/kgaveraged over a gram of tissue.•This is often associated with a very low rise in brain temperature(maximum 0.1º C) (Anderson and Joyner 1995; Vaberg 1997; van Leeuwen etal. 1999).•This temperature rise increases with the length of the call as shown in thisgraph.
EFFECT ONHEART•Studies suggest, the strength of these fields will not affect ordinaryheart rhythm or function.•Can present a danger to those with an implanted pacemaker, internaldefibrillator or similar device.•Problems most likely to arise when pacemakers and defibrillators arebeing programmed or reset by medical staff.•Recommended that keep cell phones and media players at least sixinches from the generator (implanted device).
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