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- 사람이 열쇠노릇한다과학동아 199007
- 같이 열거한 바이오메트릭 액세스 시스템의 성능을 측정하기 위해서 FRR(False Rejection Rate와 FAR(False Acception Rate) 비율이 사용된다.FRR는 출입이 허용된 자를 들여보내지 않는 오류비율이다. 일반적으로 바이오메트릭 자물쇠들은 약 2%의 오류를 내는 것으로 알려져 있다. 즉 1백번의 출입접근 ...
- 타조알과 인류의 나이과학동아 199007
- warm temperatures have been in the past, or how much humidity and rainfall there has been, so you can't be sure the rate of change from L to D has been the same. It may have been faster at some ...
- 잘못된 경종과학동아 199005
- at all. Every once in a while, some scientist comes up with something totally unexpecteted and it turns out to be accurate.Thus, a couple of years ago, substances were found which were supercon ...
- 귀소하는 거북과학동아 198907
- and end up at the wrong beaches. They breed and mix their nucleic acids with those who belong there. Even a small rate of "leakage" of this sort would wipe out most of the difference.The other ...
- 마지막 남은 청정지역과학동아 198906
- that, in cold water, the evaporation and degradation of the spill is slowed. And, at cold Antarctic temperatures, the rate of evaporation and degradation may be only one-one hundredth what it i ...
- 예수의 수의과학동아 198905
- varieties can be separated. The carbon 14 is obtained and its quantity measured sured carefully by judging the rate at which it is breaking down and producing particles.The results in th ...
- 물이 많아지고 더워진다과학동아 198902
- And yet far from doing this, we are doing the opposite. The forests of the Earth are being chopped down at a huge rate, espacially in tropical countries such as Brazill. This must be stopped. I ...
- 우주 오염과학동아 198812
- to prevent as many explosions and collisions as possbile― and certainly stop any project that involves the deliberate destruction of satellites.But that only slows the increase of danger. It do ...
- 윤초(閏秒)과학동아 198806
- records just gives us a notion how the rotation rate slows down on the average. How do we measure the rotation rate of Earth from day to day? For that we need a clock that moves more ste ...
- 가장 생명력이 강한 것과학동아 198803
- though every person's hand is against them.The vast turnover in numbers means that evolution proceeds at an enormous rate among insects, so that new species with new characteristics are being ...
