at Davis, a possible explanation for these is "phase transformation," in which upper mantle minerals become "superplastic," lose strength and act as a lubricant permitting the fault zone to grow.While thousands of small and moderate earthquakes occur every year, a big one is unlikely more than once every other year or so. The energy of earthquakes is measured according to the Richter scale of ...
to discover how these weapons can be destroyed safely. The problem is not only the nuclear material itself ; even the plastic that surrounds a bomb's aluminum casing is difficult to burn without filling the air with gases that can cause cancer.Recycling valuable parts and metals of bombs is vital in today's world, when the supply of important materials is getting short. One estimate of the ...
inside of the wood. New York City must now spend millions trying to keep the borers out by wrapping wood pilings with plastic and shoring up those piers already damaged.Then there are the new ways of generating electricity that hurt river fish. We sailed past the Indian Point nuclear power stations at night, when they seemed like fantastic lighted shapes from another planet. Unfortunately, ...
recovered, the thermoplastics can now be dissolved away from the fiber, glass, dirt and various car fluids. The thermoplastics are then recovered from the residue, and used againMy favorite example of new technology is the news item about a Berlin painting contractor named Bernd Neumann, Who found a way of mixing 'different substances' to make an odorous but 'environmentally friendly' goo ...
combine with strong winds. During a dust storm on the Alcan Highway in Alaska, a locked suitcase covered with taped plastic was still invaded by dust. A few years ago, a severe dust storm in California's Great Central Valley forced people to close schools and wear surgical masks. Paint was scoured off the windward sides of cars, and there were accidents as vehicles crashed into each other in ...
limits, and incineration is dangerous, then what's left? Better manufacturing is important. Battelle has developed a plastic material called "Biocellat" to make biodegradable memorial candleholders that humans scatter around cemeteries. Refrigeration coolants destroy the ozone layer so the Sonic Compressor Systems company hopes to make refrigerators that work by resonating acoustic waves to ...
부위는 알루미늄합금을 기본소재로 삼는다. 일부에는 섬유강화플라스틱(fiber-reinforced plastic) 복합재료가 활용되기도 한다.현재 미국 등 항공산업선진국에서 가장 많은 연구개발비를 투입하는 분야는 금속간 화합물 연구분야다. 특히 티타늄 니켈 철과 알루미늄이 결합한 알루미나이드(aluminide) 계에 ...
플라스틱은 매우 유용하다. 플라스틱은 강하고 값싸며 어떤 형태로든 쉽게 틀을 만들 수 있다. 또한 녹슬거나 변색하지 않으며 썩거나 곰 ... They insist that he only things we can do is use less plastic, maybe no plastic. But then, as I said at the start, plastics are so useful. I think we'll just have to continue looking for solutions ...
다룬다. 둘째는 유기재료이다. 흔히 볼 수 있는 것들로 대표적인 것으론 플래스틱(plastic)을 들 수 있다. 세째는 무기재료다. 무기재료는 위의 두가지를 제외한 광범위한 나머지를 지칭한다. 주로 도자기 시멘트 내화물 신소재 등을 일컫는다.요업공학(ceramic engineering)은 바로 세번째의 무기재료분야를 ...
오늘날 산업사회에서 가장 각광을 받고 있는 것은 FRP(Fiber Reinforced Plastic)이다. FRP는 이미 선체의 제조를 비롯하여 비행기의 수직날개 등 가벼우면서도 강도가 크게 요구되는 분야에 쓰이고 있다. FRP는 초고강력섬유를 필요한 형태로 성형해서 수지로 굳혀서 만든 복합재료이다.□기타의 ...