[challenge:future] invisible killer

10
----Electromagnetic radiation ----Electromagnetic radiation Facing 21st Century Disasters ----Hanjun.Wu University of Liverpool

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Page 1: [Challenge:Future] Invisible killer

----Electromagnetic radiation----Electromagnetic radiation

Facing 21st Century Disasters

----Hanjun.Wu University of Liverpool

Page 2: [Challenge:Future] Invisible killer

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

Page 3: [Challenge:Future] Invisible killer

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

Page 4: [Challenge:Future] Invisible killer

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

Page 5: [Challenge:Future] Invisible killer

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

Page 6: [Challenge:Future] Invisible killer

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

Page 7: [Challenge:Future] Invisible killer

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

Page 8: [Challenge:Future] Invisible killer

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

Page 9: [Challenge:Future] Invisible killer

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

Page 10: [Challenge:Future] Invisible killer

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