On March 11, 2011, a massive earthquake (Magnitude 9.0) and accompanying tsunami hit the Tohoku region of eastern Japan. Since then, the Fukushima Daiichi Nuclear Power Plants have been facing a crisis because of loss of all power resulting in meltdown accidents. Three buildings housing nuclear reactors were seriously damaged from hydrogen explosions and,… (More)
We report recent results from field experiments conducted with a team of ground and aerial robots toward the collaborative mapping of an earthquake-damaged building. The goal of the experimental exercise is the generation of 3D maps that capture the layout of the environment and provide insight to the degree of damage inside the building. The experiments… (More)
On March 11, 2011, a massive earthquake and tsunami hit eastern Japan, particularly the Tohoku area. Since then, the Fukushima Daiichi Nuclear Power Station has been facing a crisis. To respond to this situation, we began a project to redesign our mobile robots for disaster response missions. A key issue to be addressed was to check the radiation hardness… (More)
In urban search and rescue situations, a 3D map obtained using a 3D range sensor mounted on a rescue robot is very useful in determining a rescue crew's strategy. Furthermore, thermal images captured by an infrared camera enable rescue workers to effectively locate victims. The objective of this study is to develop a 3D thermography mapping system using a… (More)
A new direct conversion of O,O-acetals to esters via O,P-acetal intermediates was developed. The regioselective cleavage of unsymmetrical cyclic acetals occurred to give the more crowded esters as single isomers.
An unusual and novel reaction of α-alkoxyphosphonium salts, generated from O,O-acetals and Ph(3)P, with Grignard reagents under an O(2) atmosphere afforded alcohols in moderate to high yields. It was clarified by isotopic labelling experiments that the reaction proceeded via a novel radical pathway.