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Hummingbird UAV flies by flapping its wings
from New Scientist - Online News
(2011-2-19 3:10)
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Weighing just 19 grams, the tiny flying bot can hover, fly around outdoors, or enter buildings on reconnaissance missions
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Today on New Scientist: 18 February 2011
from New Scientist - Online News
(2011-2-19 3:00)
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All today's stories on NewScientist.com, including: sleepy black bears, the effect of botox on migraines, and a gravity-defying waterfall
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Friday Illusion: Escher's gravity-defying waterfall
from New Scientist - Online News
(2011-2-19 2:40)
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Can you work out how water seems to flow uphill in this Escher-inspired construction?
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Protein dose reverses learning problems in Down's mice
from New Scientist - Online News
(2011-2-19 2:24)
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Two proteins taken orally have reversed learning and memory problems in mice with a syndrome that mimics Down's
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We need both scepticism and consensus
from New Scientist - Online News
(2011-2-19 0:55)
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The pursuit of truth is not just for the scientific elite but for all of us, says UK chief scientific adviser John Beddington
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Feedback: Health benefits of radioactive peanuts
from New Scientist - Online News
(2011-2-18 23:07)
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How to truly glow with health, rocket-fuelled hair care, logically impossible emails and more (full text available to subscribers)
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Can Botox really cure chronic migraine?
from New Scientist - Online News
(2011-2-18 23:01)
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Botox has been approved for chronic migraine, but is it just Hollywood snake oil?
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Migrant beetles to eat into New Zealand dung mountain
from New Scientist - Online News
(2011-2-18 21:27)
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New Zealand has approved the release of 11 Australian species to manage its massive heap of livestock dung
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Spin doctors: TV kills
from New Scientist - Online News
(2011-2-18 19:45)
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People who watched more than 4 hours of TV a day were more likely to die than those who watched less than 2, a study found– should TV addicts be worried? (full text available to subscribers)
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書評 『物質のすべては光』『太陽の科学』『新企画は宇宙旅行！』『笑い脳』
from 森山和道
(2011-2-18 14:34)
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日経サイエンス 2010年 04月号 [雑誌]
posted with amazlet at 11.02.18
日本経済新聞出版社
Amazon.co.jp で詳細を見る
「日経サイエンス」2010年4月号 書評欄 「森山和道の読書日記」掲載
クォークはグルーオンという粒子でやりとりされる「強い相互作用」で結びついている。1970年代に、理論物理学者ウィルチェックは「強い相互作用」が近距離では弱くなる性質「漸近的自由性」を発見し、後にノーベル物理学賞を受賞した。彼による著書 『 物質のすべては光 』 は、宇宙のありようと質量の起源についての本だ。
素粒子物理学や宇宙論がらみの本を読むと、物質や空間の正体とは何なのかと考えずにはいられない。考えれば考えるほど分からなくなるのだ。本書によれば質量とは、クォークの色荷によるグルーオン場の擾乱と、対を為すクォークと反クォークとの間の、量子力学的なせめぎあいから生まれるものだ。そして空間は空っぽの容れ物ではなく、著者らが「グリッド」と呼ぶ実体であり、むしろ物質のほうがその一側面に過ぎない。そして我々が暮らすこの宇宙は、ある種の超伝導体のようなものなのだという。
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