A NASA-funded study describes how extreme solar eruptions could have severe consequences for communications, power grids and other technology on Earth.
The National Academy of Sciences in Washington conducted the study.
The resulting report provides some of the first clear economic data that effectively quantifies today's risk of extreme conditions in space driven by magnetic activity on the sun and disturbances in the near-Earth environment. Instances of extreme space weather are rare and are categorized with other natural hazards that have a low frequency but high consequences.
"Obviously, the sun is Earth's life blood," said Richard Fisher, director of the Heliophysics division at NASA Headquarters in Washington. "To mitigate possible public safety issues, it is vital that we better understand extreme space weather events caused by the sun's activity."
Besides emitting a continuous stream of plasma called the solar wind, the sun periodically releases billions of tons of matter called coronal mass ejections. These immense clouds of material, when directed toward Earth, can cause large magnetic storms in the magnetosphere and upper atmosphere. Such space weather can affect the performance and reliability of space-borne and ground-based technological systems.
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Showing posts with label COMM. Show all posts
Showing posts with label COMM. Show all posts
08 January 2009
31 December 2008
COMM: World wide cell phone usage booming
Tom Barnett (International Policy & Resilience, Strategic Briefer) suggests the below read;
As predicted, it's not one-laptop-per-child that triggers the online growth
TECHNOLOGY & HEALTH: "Poorer Nations Go Online on Cellphones," by Tom Wright, Wall Street Journal, 5 December 2008.
Long predicted by smart observers.
Heck, I do almost half my web surfing on my phone now.
NewsMax Magazine offers the following;
More Than 1/6 of Households Have Only Cell Phones
WASHINGTON -- The portion of homes with cell phones but no landlines has grown to 18 percent, led by adults living with unrelated roommates, renters and young people, according to federal figures released Wednesday.
An additional 13 percent of households have landlines but get all or nearly all calls on their cells, the survey showed. Taken together, that means about three in 10 households are essentially reachable only on their wireless phones.
The figures, covering the first half of 2008, underscore how consumers have been steadily abandoning traditional landline phones in favor of cells. The 18 percent in cell-only households compares with 16 percent in the second half of 2007, and just 7 percent in the first half of 2005.
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