Youíre traveling more than 1,000 miles across the barren snowscape of Antarctica. Along the way, many crevasses lie hidden between you and your quest to resupply the hungry scientists at the Amundsen-Scott South Pole Station. The good news is you can detect these deathtraps with a radar arm. The bad news is it only gives you approximately four seconds of warning before you and your tracked vehicle, which weighs several tons, plummet to a dark and silent tomb. If only there were a robot that could map crevasses ahead of such expeditions. Preferably one with an adorable yet mildly ferocious name.
Meet the Yeti. This four-wheel-drive rover drags a ground-penetrating radar arm capable of logging information that tells scientists what liesóor more importantly, doesnít lieóbelow. At just 180 pounds, the bot crosses snow-covered crevasses like it ainít no thing. (Since people donít wander around on foot down there, the real danger is the heavy tracked vehicles breaking through the snow bridges.) It functions at temperatures around -20 degrees Fahrenheit. In short, Yeti is an awesome little minion redrawing the boundaries of hazard georeferencing.
Most of us donít have to think about such things, but doing science on the bottom of the world is a tricky endeavor. In addition to dangerous weather conditions and 30-foot-wide trapdoors in the ice, the logistics of assembling personnel, equipment, and supplies at the South Pole is nothing short of extraordinary.
ďThe focus of this effort was to support the actual operations and logistics side of the Polar Program,Ē James Lever, mechanical engineer and specialist in over-snow mobility for the U.S. Armyís Cold Regions Research and Engineering Laboratory, told me. (I bet you never heard a kindergartener say she wants to grow up to specialize in over-snow mobility.) Lever and his co-principal investigator professor Laura Ray published their findings this month in the Journal of Field Robotics. ďWhether you have researchers in Antarctica or Greenland, you have to keep people safe and comfortable. Youíre a long way from everything else and so itís expensive to do science there.Ē
The little Yetióand its predecessor, the solar-powered Cool Robotóhave found support from the operations and science arms of the National Science Foundation as well as NASAís Jet Propulsion Laboratoryóafter all, rover work on Earthís poles isnít so different from rover work on Mars or other celestial bodies. And the lessons we learn from tweaking Yeti may one day help us in space. For instance, one of the paperís coauthors from the Thayer School of Engineering at Dartmouth College is developing an algorithm to detect characteristic moments just before Yeti gets stuck. If the algorithm can prevent the bot from getting into jams in the first place, it saves Lever and his colleagues an annoying trip out into the white. For NASA on the other hand, an immobilized rover is a really expensive bummer. For as Lever put it, ďThey donít get theirs back.Ē
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Shieldmaidens are not a myth! A recent archaeological discovery has shattered the stereotype of exclusively male Viking warriors sailing out to war while their long-suffering wives wait at home with baby Vikings. (We knew it! We always knew it.) Plus, some other findings are challenging that whole ‚Äúrape and pillage‚ÄĚ thing, too.
Researchers at the University of Western Australia decided ...
Off Your Knees, Germany! Ernst Zundel 1983 - 2003 2015-04-25 1:15
For more information on the holocaust, how the war was forced upon Germany, and the REAL victims of the second world war see:
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A big congrats to a friend I‚Äôve been working with for several years, he stood up to the predators commonly called the ‚ÄúIRS‚ÄĚ and they dropped their attack. Thanks also for providing me with the proof below.
The criminals called the ‚ÄúIRS‚ÄĚ initiated an attack claiming my friend was required to file six tax returns, or explain how he made ...
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Into Eternity is a documentary about a deep geological repository for nuclear waste. The concept of long-term underground storage for radioactive waste has been explored since the 1950s. The inner part of the Russian doll-like storage canisters is to be composed of copper. Hence in the case of Onkalo it is tightly linked to experiments on copper corrosion in running ...
SPLC Accuses Oath Keepers of Inciting ‚ÄúArmed Confrontation‚ÄĚ Over Sugar Pine Mine 2015-04-24 20:22
The Southern Poverty Law Center has accused Oath Keepers of inciting an armed confrontation with BLM authorities over the Sugar Pine Mine dispute in Oregon, despite the fact that the organization has explicitly stated that it is not promoting armed confrontation with the feds.
In an article provocatively posted on the organization‚Äôs ‚ÄėHatewatch‚Äô section entitled Oath Keepers Descend Upon Oregon with ...