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Showing posts from May, 2014

What It Feels Like to Lie Face Down and Let a Wildfire Burn Over You

Original Source: The Atlantic, Author Brian Mockenhaupt  May 23, 2014 When a blaze takes an unexpected turn, a thin aluminum shelter is a firefighter's last resort.   (During the Little Venus Fire, a firefighter reached out of his shelter to photograph the burning forest. (Courtesy of the Little Venus Fire Shelter Peer Review Report)  In my feature story in the June issue of The Atlantic , I wrote about a wildfire in Yarnell, Arizona, that trapped 19 firefighters last summer. As the blaze changed direction with unexpected ferocity, they had one chance for survival: lie face down on the ground, cover themselves with a thin aluminum shelter, and let the fire burn over them. Some made it into their shelters, but it didn't matter; the speed and intensity of the fire was too much. But fire shelters have saved hundreds of people’s li

Improved Grey Eagle, Remote Piloted Aircraft

Originally posted:  Aerospace and Defense News: General Atomics Aeronautical Systems, Inc., a leading manufacturer of Remotely Piloted Aircraft (RPA) systems, radars, and electro-optic and related mission systems solutions, today announced the successful second endurance flight of the U.S. Army's Improved Gray Eagle® (IGE) prototype Unmanned Aircraft System (UAS), an advanced derivative of the mission-proven Gray Eagle UAS that has accumulated over 100,000 flight hours since 2008. The flight of IGE lasted 36.7 hours, taking off on January 17 and landing on January 19 at the company's El Mirage Flight Operations Facility in Palmdale, Calif. "Improved Gray Eagle is a significant capability


Starting from China (and later in other countries), June will see the opening of our official calibration and service laboraties for our handheld aerosol particle counters and monitors. Servicing of your particle counters, GT-321, 526S, 804. BT Series,  etc. as well as the Aerocet-531S, 831, GT-331 etc. can be done locally near you.  No longer will you have to send your equipment back to the USA.  You save time and shipping expenses and we receive happy customers! Please contact or for more information about how we take service seriously.


Originally posted USA Today:  Mary Bowerman Almost 150 million people live in areas where air pollution levels are unhealthy to breathe, an increase from a previous American Lung Association report. A new report tries to clear the air on where America stands in its battle with air pollution. The 2014 State of the Air report out Wednesday from the American Lung Association presents a good news/bad news mix showing improvements in America's air quality compared with previous decades, but more recently an increase in ozone readings since its 2013 report. Bottom line, the association says, is that 147.6 million people live in areas where air quality remains unhealthy, almost 16 million more than the 2013 report. "The Clean Air Act has helped us come a long way," says Janice Nolen, assistant vice president at the American Lung Association. "But we have 120 days of

Handheld Mass Monitors are Indoor/Controlled Environment Monitors BUT.....How to 'spot check' ambient air?

Service Bulletin                                                    Aerocet 531, Aerocet 531S, 831 Mass Monitors Subject: Using a K - Factor                                             13 MAY 2014 The accuracy of the Aerocet 531, 531S, or 831 Mass Monitors depend highly upon the reflectivity of the particulate. The instrument is calibrated in the factory using PSL particles. In many cases, real world particulate can have a completely different characteristic than the calibration aerosol, simply due to the reflectivity properties of the particulate. Coal dust is significantly different in reflectivity characteristic than airborne dust near an aluminum smelter. In many cases, these mass monitors will need a K-factor set into them via the software. This is especially true when the instrument is used outdoors for spot checks. A K-factor is simply a multiplier. For example, if you have a device that is reading only half of