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The WiFi Blues
Philadelphia is a city of brotherly love. Many in San Francisco want it…
Wireless Broadband Internet Access (WiFi) sounds too good to be true. here
At a relatively low cost, anyone can get internet anywhere in the city. All the city
WiFi antenna must be installed.
The argument in favor of citywide WiFi is that it will reduce The digital divide:
The poorer you are, the more limited your access to the Internet and information
Resources Cities like Philadelphia and San Francisco are actively trying to shut down
The digital divide. One option is WiFi.
Yet when weighing the options, virtually nothing is heard about potential health
The risk is that saturating the entire city with WiFi increases the current burden of nonionization
Radiation is called burden Electrosmog By some, they are chronic
Exposure to low-level concentrations of nonionizing radiation from familiar sources
such as radio and TV signals, electronic and electrical equipment, and the ubiquitous cell
Wireless internet access
local area network (LANS) link computers, printers, modems and more
Devices physically make the links using traditional LAN wire cables. the message
Managed by devices between computers and other devices on the network
called a router.
A wireless LAN eliminates wire cables by using a transmitting router and
Receives radio signals. To use a wired LAN, you need to plug in a computer or other
Appliance into a wall socket. A wire goes from the socket to the router, which manages it
Signal traffic between devices on a network.
With a wireless LAN, each device on the network is configured so that it can send signals
Go to the router and get the signal back. Wireless routers usually have a range of A
One hundred to several hundred feet. Range can be extended by adding boosters
This increases the signal strength.
As with all radio signals, you will get closer to the transmitter (router).
Signal strength. Cell phones work on a similar principle. That’s the difference
Cell phones operate on a different frequency and provide a stronger signal than wireless
Cell phones operate on frequencies in the 3 to 30 GHz range, similar to microwaves
Oven wireless LANs operate on one-tenth of that range–0.3 to 3 GHz, range
UHF television broadcasting. GHz Gigahertz means, a standard measure
Radio frequency radiation (RFR—Produced by electromagnetic radiation
Sending alternating current through the antenna. The higher the GHz, the
Fast Current Alternative.
Frequency itself does not measure the potential impact of RFR. As you will
Guess what, signal strength matters too. The signal strength is measured
in Watts, a standard measure of electrical energy. For example, 100 watts
A light bulb is brighter because it puts out more energy than a 60 watt bulb.
Consider the effect of waves on a beach: small waves farther apart (less strong, less
frequency) versus larger waves together (higher strength, higher frequency). The
The former is likely to have less impact than the latter.
Exposure to RFR is measured using SAR–Specific Absorption Rate. SAR is
Expressed in milliwatts/kilogram (mW/kg) or milliwatts/cubic of body weight
Centimeters of exposed body area (mW/cm2): wave size and how much
It hits your body.
WiFi enthusiasts dismiss health risk concerns because of power output and SAR
Exposure is significantly below the minimum standard set for cell phones. But the cell
Phone standards are set for short-term exposure to cell phones in use
to your head In addition, standards are set based on the thermal (heating) effect
Nonthermal effects of cell phones are documented at lower exposures than current
US standards, including
– memory loss,
– sleep disturbances,
– slow motor skills and reaction time,
– Decreased immune system,
– Spatial disorientation and dizziness,
– decrease in sperm count,
– Increased blood pressure and pulse,
– DNA breakage and reduced DNA repair capacity, and
– Cell proliferation.
Another problem is that cell phone connectivity is intermittent, while WiFi is
Exposure is constant. A more accurate comparison is to the effect of a cell phone
Transmitting antenna. These antennas transmit and receive radio frequency signals
The signal strength from the antenna is comparable to that of a cell phone, only closer
Range exposure is not a brief burst of cell phones but a more or less continuous shower.
Strength RFR. In addition to the documented health effects of cell phone use,
With display of cell phone antenna
– Increased blood pressure and pulse,
– sleep disturbances,
– Emotional effects such as increased depression and irritability,
– Memory loss and mental fog,
– Fatigue and dizziness, and
– Increases the risk of cancer.
Because of these effects, the International Association of Fire Fighters (AFL-CIO)
Decided in 2004 that they would not allow cell phone antennas on fire houses.
Much of the discussion of RFR health effects is framed as public concern
Those who are hypersensitive. Hypersensitivity is the technical term for allergy
and similar immune system overreactions. But instead of pollen, R.F.R
Hypersensitivity is a reaction to nonionizing
The radiation seems to affect some unlucky few while the rest of the people are turned off
Research by Ole Johansson and Orjan Hallberg of the Karolinska Institute, Stockholm
suggests otherwise. He saw the incidence of cancer in Europe and America
And a striking correlation was found between the increase in certain cancers
20th century RFRs and exposures measured by radio and TV broadcasts.
What hypersensitivity really represents is one extreme in a complex landscape
Consequences and Risks. As with any other environmental stressor, RFR will affect some
More people than others. And as with other environmental stressors, more
The overall burden, the greater the risk of becoming one of the “unlucky few”.
Wireless LANs add to the existing burden of RFR. Like burning more fossil fuels
Adds more smog, adding more RFR adds more electrosmog. You don’t need it
Expose your home or your city to the increased burden that WiFi creates. There is one
Viable option: Wired LAN. Propaganda can make it seem less comfortable and
more expensive. But what is the price of a good night’s sleep? or reducing your risk
International Association of Fire Fighters. 2004. Status on health effects from
Radio frequency/microwave (RF/MW) radiation from fire department facilities
Base stations for antennas and towers for cell phone transmission
Transmission. Accessed at http://www.iaff.org/safe/content/celltower/
Johansson, Ole, and Doug Loranger. 2005. Electrosmog. Your own health and
Fitness. Broadcast November 29, 2005. http://yourownhealthandfitness.org/
Sage, Cindy. 2005. Commentary on San Francisco TechConnect Community Wireless
Broadband initiative. Sage Associates: September 2005.
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