[challenge:future] invisible killer
Post on 13-Jul-2015
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----Electromagnetic radiation----Electromagnetic radiation
Facing 21st Century Disasters
----Hanjun.Wu University of Liverpool
1 .Definition of Electromagnetic radiation1 .Definition of Electromagnetic radiation
a form of energy that exhibits wave-like a form of energy that exhibits wave-like
behavior travelling through spacebehavior travelling through space
has both has both electricelectric and and magneticmagnetic field field components which oscillate in phase components which oscillate in phase perpendicular to each other and perpendicular to each other and perpendicular to the direction of energy perpendicular to the direction of energy propagation.propagation.
substance really existed while it is substance really existed while it is invisibleinvisible
Facing 21st Century Disasters
2. Sources2. Sources
computers 、 microwave oven 、 cell phones 、 remote control and so on.
Artificial
Lightning, sunspot activity and cosmic rays
Natural
Facing 21st Century Disasters
3. Damage3. Damage
heating effect and heating effect and non-thermal effectnon-thermal effect
derives energy to human, making blood 、 lymphatic fluid and cell bioplasm changed , thus disturbing the function of the body
Facing 21st Century Disasters
In 1998, the world health organization lists five impactsIn 1998, the world health organization lists five impacts
Female endocrine even menstrual disorderschaos
Children growth, bone marrow development, blurred vision, retina fall off, liver haematopoiesis
affect
Maternal Abortions, infertility and teras induce
reproductive system, nervous system and the immune system damage
Cardiovascular disease, diabetes and cancer mutations incentive
Facing 21st Century Disasters
4. The increasing Electromagnetic radiation4. The increasing Electromagnetic radiation
0
10
20
30
40
50
60
70
80
90
100
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011*
Global ICT developments, 2001-2011*
Per 1
00 in
habita
nts
Mobile-cellular telephone subscriptions
Internet users
Fixed telephone lines
Active mobile-broadband subscriptions
Fixed (wired)-broadband subscriptions
Examples:By the end of 2010,the global Internet users :2.08 billions cell phone user: 5.28 billions
Facing 21st Century Disasters
5. Solution: reduce & avoid 5. Solution: reduce & avoid
Electromagnetic radiation damage human Electromagnetic radiation damage human in an invisible way in an invisible way
Simple ways to reduce : keep away from Simple ways to reduce : keep away from the radiation the radiation
Measurement: Radio Measurement: Radio
Facing 21st Century Disasters
1.cell phones1.cell phones
In standby mode, try to In standby mode, try to distance.distance.never keep close to never keep close to cellphone when sleepingcellphone when sleepingBefore answering ,distance Before answering ,distance the cellphone first and then the cellphone first and then make it close to your ear.make it close to your ear.use less and never keep use less and never keep calling surpluss half an calling surpluss half an hour. hour.
Facing 21st Century Disasters
2.computers2.computers
ventilate the indoor ventilate the indoor
put cacti beside put cacti beside
wash face , tea or relaxwash face , tea or relax
inregulate the body function.inregulate the body function.
metal beside crease radiation.metal beside crease radiation.
the back emerge radiation most the back emerge radiation most
used computer double the radiation , used computer double the radiation , too Screen brightness.too Screen brightness.
Facing 21st Century Disasters
3.other appliance3.other applianceDistance induction cooker at least 20 center metre keeping away from television at least 2 metre is safe.
......
the siple way to reduce is to try to keep them away
moving a living radio around the aplliances when nosie emerge
Facing 21st Century Disasters
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