I started a Hurricane Survival Kit years ago (even before Katrina). I grew up on the Mississippi Gulf Coast and all of my family still lives there, so we spend a lot of time telling "hurricane stories." Like "Remember when we ate so much steak that we got tired of it?" And "Remember when you took a cold shower and it felt wonderful because it was so hot in the house"?
My dad loves to tell the one about how he could never get me away from the huge sliding glass door when I was a little girl. He'd tell me time and again to stay away from the glass - then he'd wake up and I'd be standing in front of it...almost mesmerized. (And I'm still that way. I could watch storms for hours. I love to walk in them.)
Well, enough about me. This little contraption, the portable 48-second purifier, would be a good item to add to your Hurricane Survival kit. It was named one of Time magazines Inventions of the Year. It is the only portable handheld water-purification device that uses ultraviolet light to purify 16 oz. of clear water per use in a mere 48 seconds or 32 oz. of water per use in 90 seconds. The ultraviolet light destroys microbes such as giardia and cryptosporidium, eliminates 99.99% of viruses such as hepatitis and poliovirus, and kills 99.9999% of bacteria such as Salmonella and E. coli.
Here's a round-up of the other recommended items:
Watching for changes in the inner eyewall of a hurricane may help forecasters overcome one of the challenges of hurricane predictions - predicting sudden strengthening or weakening. The ability to predict a hurricane path has greatly improved of late, but anticipating changes in intensity has remained a problem.
Now, a research team led by Robert A. Houze, Jr., a University of Washington professor of atmospheric science, is reporting evidence that clouds around the eyewall of a storm can cause sudden changes in intensity.
The findings, in the March 2 issue of the journal Science, are based on analysis of data collected in 2005 during Hurricanes Katrina and Rita. The strongest winds in a hurricane circulate in the cloud wall that surrounds the eye of the storm.
Taking measurements from aircraft flying into these storms, the researchers led by Houze found that occasionally a "moat" of clear air will form outside the eyewall. Winds funneling toward the center of the storm will then form a new eyewall outside the original one, cutting off the storm center from the incoming flow of energy and eliminating the old eyewall.
Because the new eyewall is larger than the old one, its winds circulate more slowly — as an ice skater with arms extended spins more slowly than one with arms held close to the body — thus reducing the intensity of the storm.
But the new eyewall can then begin to contract, spinning faster and faster and increasing the storm's intensity.
[ via The Associated Press ]
Photo via Engadget
A wall of wind hit a suburb west of Miami last week with 115-mph winds and driving rain.
Researchers at Florida International University created the Wall of Wind - which is actually a pair of eight-foot fans designed to simulate hurricane conditions. The machine could help scientists unlock the secrets to building safer and stronger houses.
The 1950 concrete block had seen better days and was slated for demolition - the two-bedroom, one-story home was deemed a complete loss after the 10-minute assault. All in the name of research.
The portable Wall of Wind and a six-fan version now under construction at FIU's engineering campus are prototypes for the mega wind machine the hurricane research center hopes to construct by next summer. It will be a 45-foot wall with 18 giant fans that can pound an entire house with 160-mph winds. That's equal to a top-of-the chart category 5 hurricane.
Such a facility, which is contingent on FIU receiving a $5.8 million grant from the state, would for the first time allow scientists and manufacturers to take the guesswork out of how and why houses fail during storms.
Big enough to accommodate the 18-fan apparatus and a 2,400-square-foot house, the prefabricated steel building would help resolve one of the biggest obstacles manufacturers and engineers have when testing building materials and designs to withstand hurricane-force winds: size.
For now, the wind resistance of doors, windows, roof tiles and other housing components are tested in wind tunnels barely big enough to fit a human. As a result, testers depend on miniature models.
The inspiration for the Wall of Wind was the Insurance Institute for Highway Safety's Vehicle Research Center, where new cars are routinely crashed into walls. Just as crash tests led to the introduction of air bags and other safety features, Leatherman predicts the wind walls will lead to innovations by builders and manufacturers and change the demands of consumers.
It's attracting notice from the insurance industry. RenaissanceRe Holdings Ltd., one of the world's largest providers of hurricane reinsurance, contributed nearly $380,000 to the development of the six-fan Wall of Wind, which will be capable of pounding a section of a house with winds up to 140 mph.
[ Thanks to Neal F. Guye for the link to Maya Bell's article in The Sun-Sentinel. ]
The Southeast's climate provides more than just hurricanes during the hot summer months - humidity is also in abundant supply. And now companies are producing machines - water generators - that pull the humidity from the air and turn it into drinking water (which is in scarce supply following a hurricane).
The biggest machines can make 5,000 liters of water a day, enough to provide about a gallon to 1,250 people. Small units cost several hundred dollars, while bigger, more elaborate machines can go for as much as half a million.
Scientists who study water shortages say that while the technique works and could be part of the solution, there are cheaper and easier ways to provide water purification - namely boiling it to remove microbes or treating it with chemicals like chlorine. The biggest obstacle to the water generators is that they require fuel to run, which is also in short supply after a hurricane. (Most are powered by diesel fuel.)
