The aluminum foil shelter that Wildland Firefighters carry as part of their 50 lb back-country fire kit is intended to be that last resort when the fire is not only gaining on their position but has skipped ahead, and they are trapped with fire coming from all sides.
The physics of this 'last chance' technology are real and can be easily calculated. Hotshot Firefighters drill on this like their very lives depend on it. Any fire is the equation of heat + fuel + oxygen. Heat is temperature of the the available mass either mitigated by high humidity, or greatly boosted by low humidity. Fuel in a forest is a given. Oxygen in the outdoors is a matter of wind speed.
Prairie2: Facing the 'Final Resort'
12 Things The Tobacco Industry Doesn't Want You To Know
Over the past couple of decades, Big Tobacco has come under fire for selling products that kill people. Now, leading cigarette producers like Philip Morris and Reynolds American are moving into the rapidly growing electronic cigarette business, touting the battery-powered nicotine inhalers as a safer alternative to traditional cigarettes.
As Big Tobacco attempts to clean up its image, we thought now was as good a time than ever to remind you of these 12 facts the industry would like you to forget:
'Invisibility cloak' pioneer John Pendry scoops Newton Medal
The physicist who proposed the idea of an "invisibility cloak" has received the Newton Medal, the highest honour of the UK's Institute of Physics (IoP). Imperial College London's Prof Sir John Pendry was cited "for his seminal contributions to surface science, disordered systems and photonics".
But his work on cloaking and "metamaterials" is arguably his most famous and potentially transformative. IoP president Peter Knight called the award "our most important medal".
Egyptians flood streets to force Mursi out
Hundreds of thousands of Egyptians flooded into the streets on the first anniversary of Islamist President Mohamed Mursi's inauguration on Sunday to demand that he resign in the biggest challenge so far to rule by his Muslim Brotherhood.
Waving national flags and chanting "Get out!", a crowd of more than 200,000 massed on Cairo's central Tahrir Square. It was the largest demonstration since the 2011 uprising that overthrew Mursi's predecessor, Hosni Mubarak.
Exposing the Dark Forces Behind the Snowden Smears
Since journalist Glenn Greenwald revealed the existence of the National Security Agency’s PRISM domestic surveillance program, he and his source, the whistleblower Edward Snowden, have come in for a series of ugly attacks.
On June 26, the day that the New York Daily News published a straightforward smear piece on Greenwald, the website Buzzfeed rolled out a remarkably similar article, a lengthy profile that focused on Greenwald’s personal life and supposed eccentricities.
States with the most dangerous bridges
From rural covered passes to modern engineering marvels, bridges overcome natural obstacles and expedite transportation. Yet many of the bridges that people drive on every day are in rough shape. According to one transportation group, more than one in 10 of the country's bridges are in need of serious repair or replacement.
In many states, the situation is more dire. Nearly a quarter of the bridges in Pennsylvania are structurally deficient, the highest of all states, according to Transportation for America, a grassroots organization advocating updated transportation infrastructure.
Guantanamo criticized over inmate suicide
A report by the US military into the suicide of a Guantanamo detainee last year has criticised the facility's guards and medical staff for not following correct procedure.
Al Jazeera has obtained a copy of the report into the suicide of Adnan Latif, a 31-year-old Yemeni man who overdosed on anti-psychotic medication last September.
Latif was pronounced dead on September 8, 2012, the same day that his mother died, according to the report.
Jimmy Carter: Women's Plight Perpetuated By World Religions
Former U.S. President Jimmy Carter says religious leaders, including those in Christianity and Islam, share the blame for mistreatment of women across the world.
The human rights activist said Friday religious authorities perpetuate misguided doctrines of male superiority, from the Catholic Church forbidding women from becoming priests to some African cultures mutilating the genitals of young girls.
The Biggest Liberal Protest Of 2013 In 35 Photos & Video
To little national fanfare, the largest liberal protest of 2013 took place on Monday this week in North Carolina, with thousands in attendance and hundreds getting arrested.
For weeks, faith leaders in the Tar Heel State have gathered every Monday to give voice to women, the poor, and other groups under attack by the Republican-held legislature. (To learn more about how Republicans won back the North Carolina statehouse for the first time since the Civil War, read Ian Millhiser’s recent piece “How One Millionaire Is Turning North Carolina Into A Tea Party Utopia”.)
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