d라이브러리
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- 최신기술과학동아 l1993년 05호
- useful energy or products. Waste Conversion Systems Inc., in Englewood, Colo., has patented a 'biomass' burner that not only disposes of old tires, newspapers, and the like, but it turns them i ...
- 아주 높이 있는 먼지과학동아 l1993년 04호
- source of it they can find, including comets.Comet Halley's last appearance did not excite the public because it was not easy to see this time, thanks to the light pollution in Earth's s ...
- 먼지의 영향과학동아 l1993년 04호
- , top soil in the United States erodes by wind at the rate of 20 million tons a year. Some of the dust is from areas not used by humans, but most of it is caused when wind hits plowed fields or ...
- 체온저하증과학동아 l1993년 01호
- true for ill or elderly people, who may have less awareness of being chilled. They won't notice that they're not dressed warmly enough for going outside or even for watching TV in a room ...
- 낮과 밤의 리듬과학동아 l1993년 01호
- 낮과 밤의 리듬의 변화는 우리가 사는 지구와 그 위의 모든 것을 지배한다. 최근 보도된 야간근무상의 문제와 약 심지어는 농업에 관련된 뉴스들은 모두 바로 낮과 ... lighting, only half as many weeds germinate.So perhaps it's best to pay attention to light-dark rhythms, e ...
- 맨틀과 핵과학동아 l1992년 12호
- Geologist Roger Larson has hypothesized that a "super-plume" erupted from the mantle 120 million years ago and caused not only crust formation but a temporary(well, 40 million years' worth) st ...
- '파이어니어'와의 안녕과학동아 l1992년 12호
- different. Earth's crust wells up from a mid-ocean ridge, then moves long distances horizontally until it dives under another plate at the subduction zone. On Venus, plates don't seem to move h ...
- Out Of The Sun 태양으로부터과학동아 l1992년 11호
- a new detector made of silicon wafers plus superfluid liquid helium, to find more of the low-energy neutrinos.Another theory of neutrinos is attracting attention. The "M. S. W." theory is named ...
- 더 많은 복제과학동아 l1992년 10호
- as Rebek says, "the same behavior(replication, cooperation and mutation) as those that were."In the meantime, another sort of synthetic "life" goes on in computer research. Programs have been ...
- 블랙 홀 탱고과학동아 l1992년 10호
- Kormendy and Douglas O. Richstone studied galaxy NGC 3115, 30 million light-years from us.Apparently, its nucleus is not only spinning fast, but drawing in (and increasing the velocity of) the ...
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