https://en.m.wikipedia.org/wiki/Liquid_Cooling_and_Ventilation_Garment
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Thursday, January 28, 2016
Fireman need reliable cooling unit!
Heat & Muscle performance---no reason for death or medical emergencies in HS Football practice
But what does overheating have to do with fatigue in the first place? Much of the lab's recent research can be summed up with Grahn's statement that "temperature is a primary limiting factor for performance." But the researchers were at a loss to understand why until recently. In 2009, it was discovered that muscle pyruvate kinase, or MPK, an enzyme that muscles need in order to generate chemical energy, was highly temperature- sensitive. At normal body temperature, the enzyme is active – but as temperatures rise, some of the enzyme begins to deform into the inactive state. By the time muscle temperatures near 104 degrees Fahrenheit, MPK activity completely shuts down. There's a very good biological reason for this shutdown. As a muscle cell increases its activity, it heats up. But if this process continues for too long, the cell will self-destruct. By shutting itself down below a critical temperature threshold, MPK serves as an elegant self-regulation system for the muscle. "Your muscle cells are saying, "You can't work that hard anymore, because if you do you're going to cook and die,'" Grahn said. When you cool the muscle cell, you return the enzyme to the active state, essentially resetting the muscle's state of fatigue. The version of the device that will be made available commercially is still being tweaked, but the researchers see applications for heat extraction in areas more important than a simple performance boost. Hyperthermia and heat stress don't just lead to fatigue – they can become medical emergencies. "And every year we hear stories about high school athletes beginning football practice in August in hot places in the country, and there are deaths due to hyperthermia," said Heller. "There's no reason why that should occur."
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Saturday, January 16, 2016
We have it in x37b--all we need is C version, BUT as you heard in sotu -- dummy potus!
A scaled-up version with an astronaut crew to work outside the vehicle could reestablish America's ability to build and maintain big structures in Earth orbit.
America is not building a second-generation space shuttle but is instead building
three space capsules: the Orion and two others, from Boeing and SpaceX. All will land by parachute, like spacecraft of the 1960s, and none will allow space walks comparable to the space shuttle. Unlike Hubble, the next big telescope, the James Webb Space Telescope (due for launch October 2018) will have to be right the first time. There will be no way to repair it. It is already more costly than originally planned, and there is no shuttle to take astronauts to save it if something goes wrong.
The U.S. Air Force's Boeing X-37B, which began as a NASA craft but was transferred to the Pentagon in 2004, is an unmanned space plane that looks like a small space shuttle. Like the shuttle, it returns to Earth and lands on a runway. It has been flying successfully for five years. A scaled-up version with an astronaut crew to work outside the vehicle could reestablish America's ability to build and maintain big structures in Earth orbit.
Abbey ----lost in space--- Washington examiner
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Saturday, December 19, 2015
Fireman cooler avoids overheating!
Heat & Muscle performance---no reason for death or medical emergencies in HS Football practice
But what does overheating have to do with fatigue in the first place? Much of the lab's recent research can be summed up with Grahn's statement that "temperature is a primary limiting factor for performance." But the researchers were at a loss to understand why until recently. In 2009, it was discovered that muscle pyruvate kinase, or MPK, an enzyme that muscles need in order to generate chemical energy, was highly temperature- sensitive. At normal body temperature, the enzyme is active – but as temperatures rise, some of the enzyme begins to deform into the inactive state. By the time muscle temperatures near 104 degrees Fahrenheit, MPK activity completely shuts down. There's a very good biological reason for this shutdown. As a muscle cell increases its activity, it heats up. But if this process continues for too long, the cell will self-destruct. By shutting itself down below a critical temperature threshold, MPK serves as an elegant self-regulation system for the muscle. "Your muscle cells are saying, "You can't work that hard anymore, because if you do you're going to cook and die,'" Grahn said. When you cool the muscle cell, you return the enzyme to the active state, essentially resetting the muscle's state of fatigue. The version of the device that will be made available commercially is still being tweaked, but the researchers see applications for heat extraction in areas more important than a simple performance boost. Hyperthermia and heat stress don't just lead to fatigue – they can become medical emergencies. "And every year we hear stories about high school athletes beginning football practice in August in hot places in the country, and there are deaths due to hyperthermia," said Heller. "There's no reason why that should occur."
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