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"名辞は忘却に似る"
□ Kopi Luwak feat. Tiff Lacey
♪ Far & Away
□ Kirsty Hawkshaw meets Tenishia
♪ Outsiders (Jose Amnesia Remix)
□ Lokitas
♪ Magenta (Afra & Spul Dub FM Mix)
_*
The world's largest digital camera has been installed on a new telescope designed to hunt for potentially dangerous asteroids.
The camera was installed on the PS1 telescope in Maui, Hawaii, US, the first of four telescopes being built as part of a project called the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS).
Pan-STARRS will make frequent scans of the sky, searching for asteroids that could pose an impact threat to Earth
The impact flux from kilometre-sized bodies has increased by at least a factor of two over the long-term average during the last ?100 Myr. This surge probably was triggered by the catastrophic disruption of the parent body of the asteroid Baptistina, which broke up in the inner main asteroid belt. Fragments evolved to orbits where they could strike the terrestrial planets.William F. Bottke, David Vokrouhlicky' and David Nesvorny'
In the mammalian visual system, spikes evoked by visual stimuli have millisecond-scale timing, even though the relevant time scales of visual processing themselves are much slower. In cat lateral geniculate nucleus, spike timing precision is not absolute for all classes of visual stimuli, but is relative to the time scale of the stimulus. Further, it is demonstrated that this relatively high level of precision is required to construct an accurate representation of the stimulus.
模擬太陽ランプを使った実験で、新開発のセラミック材料を使い、大出力のレーザー光に増幅することに成功した。これまで、数%~10%程度だった太陽光からの変換効率を42%に高めた。波長の幅広い太陽光を吸収できるクロムと、太陽光を効率よくレーザー光に変換できるネオジムを、セラミック材料に高密度に注入して実現した。
太陽光は、大気や雲に吸収され、地表に届くのは3割程度。一方、宇宙では、昼夜や天候に左右されずに利用できる。このため、宇宙からレーザー光で地表に運べば、利用可能なエネルギーは、地表の5~10倍になる。
JAXAは2030年を目標に、100~200メートルの反射鏡を備えた人工衛星を打ち上げ、レーザー光に変換して地上に発射、発電や水素製造に利用する研究を進めている。