능란한 화술, 지능적 의사소통
과학동아 1996년 07호
잘 따라오지 않을 때는 입으로 물며 끌어당기기도 한다. 이러한 행동을 병렬주행(tandem running)이라 부르는데, 어떻게 이런 비효율적인 의사소통 방법으로부터 냄새길을 놓아 한꺼번에 여러 동료들을 동원할 수 있는 대중 전달 수단이 진화될 수 있었는가는 대단히 흥미로운 연구과제가 아닐 수 없다 ...
잘 따라오지 않을 때는 입으로 물며 끌어당기기도 한다. 이러한 행동을 병렬주행(tandem running)이라 부르는데, 어떻게 이런 비효율적인 의사소통 방법으로부터 냄새길을 놓아 한꺼번에 여러 동료들을 동원할 수 있는 대중 전달 수단이 진화될 수 있었는가는 대단히 흥미로운 연구과제가 아닐 수 없다 ...
표현되지 않는 경우가 많다. 따라서 외계의 주기로부터 완전히 독립한 '자유연속리듬(free running period:τ)'의 상태하에서 비로소 개체의 내인성 요인을 평가할 수 있다.외계의 조건에 동조하여 항상상태로 된 리듬의 주기는 태양일(24시간)과 정확하게 일치되지만 일체의 동조인자를 제거한 조건에서 ...
vaccine may be produced, although it will be years before the malaria genome is completely understood (and funding is running out).Malaria is no longer just another tropical disease. It encompasses the world and must be fought. But as Sheldon M. Schuster, head of the Malaria Genome Project at the University of Florida says, "You need to know the enemy in order to attack it effectively."(c) 19 ...
computer information retrieval is needed). In the meantime, those who try to keep up tend to feel a little like Alice, running very hard with the Red Queen just to stay in one place. The technology epidemic also makes it hard to think wisely about the effects this technology is having now, and will have in the future.OK. But we can't escape to a nice South Sea island — not with pollution ...
are less unsightly and disease-ridden than open dumps, but overpopulation ensures that space on the planet is running out Dumping garbage where people don't live—deserts, ice fields, ocean, mountaintops—isn't the answer, either. On planet Earth everything is connected, so fouling up here louses up there — to say nothing of destroying potentially valuable ecology.In the meantime, ...
TV sets. This can be more than annoying. It is positively dangerous when the affected electronic systems are computers running our banks, government offices, military establishments, you name it - for computers are everywhere.An enormous amount of effort is currently put into noise control. Machines are mounted on vibration-absorbing platforms, not only to reduce the noise for human ears but ...
to the European circumnavigation of Africa and the discovery of America.) Now the Japanese dream of a modern highway running the width of Asia along the course of the old silk route.They dream also of using the copious water power in the Himalayan mountain range for the production of nonpolluting electrical power of building a road across the northwestern tip of Colombia, just south of the ...
of danger. It doesn't remove it. Ideally, we ought to think up some way of periodically cleaning up space, of running a vacuum cleaner over it, so to speak. Unfortunately, there doesn't seem any way, in the foreseeable future, of working up an efficient and affordable space-cleaning system.(c) 1988, Los Angeles Times ...
still plenty left.Still, everything must end eventually. In five or six billion years more, the sun's hydrogen will be running low and its helium core will have become crucially large and hot. It will reach a point where the helium atoms will start fusing to still more complex atoms. There will be a sudden flow of additional heat and the sun will begin to expand. It will grow much larger and ...
will supply will undoubtedly not be needed for energy purposes because the distant settlements should, presumably, be running on nuclear fusion reactors. However, those distant oceans are made up of nitrogen, carbon and hydrogen, three elements that are essential to maintain the settlements and that are relatively rare on most of the worlds we can approach. (The moon has none of these ...