弹指之间 At Your Fingertips触控荧幕的应用非常广泛，例如游客导览系统、自动柜员机、销售点终端机、工业控制系统等。在2000年，六家专门厂商加上几家大公司的触控产品部门，总产值高达八亿美元。由于这种介面使用方便、经久耐用，而且花费不高，因此市场还在成长之中。触控荧幕可依其侦测触控点的...
基因改造食物安全吗？- 鼓吹基因改造作物的人说，这类作物不像传统作物，需要的有毒农药较少，对环境有利。但令批评者担忧的是潜在的风险，他们想知道所谓的利益究竟有多少。到底基因改造作物是环保美梦的实现，还是一场正在形成中的灾难？科学家正积极寻找答案。 GENETICALLY MODIFIED FOODS...
Temperatures in some parts of the country have eased a bit over the weekend. But there is no risk that throngs of people are suddenly going to turn th...
A future vehicle While many technological advances occur in an evolutionary manner, occasionally a revolutionary technological appears on the horizon ...
在火星上，嗓门可得大一点！研究显示火星大气的吸音效果特好，是地球大气的100倍。 声音依靠介质粒子碰撞传递能量，声波的传播速率与衰减决定于介质的状态与种类。火星地表的大气压仅有地球的0.7％，大气成分95％是二氧化碳、再来是2.7％的氮气、1.6％的氩气，而平均温度是零下63℃。可以预期，声音在火星...
Clean energies are forms of energy which do not pollute the air, the ground, or the sea.Clean energies include:Solar powerSolar power describes a numb...
制造白光LED的新方法 Light from a blue light-emitting diode is converted into yellow light using phosphors. The resulting white light is produced quite efficie...
黑洞的能量效率惊人，如果地球上的汽车引擎效率能像黑洞一般，则一加仑的汽油可跑十亿英哩！ Waste not. Surrounding matter is sucked toward a supermassive black hole, where it is expelled back out a...
Artificial intelligence in the game of goEarly in the film "A Beautiful Mind," the mathematician John Nash is seen sitting in a Princeton co...
Wanted: Anti-Terror Technology呼之欲出的反恐怖科技Silicon Valley companies are being enlisted into the War on Terrorism.硅谷公司正在积极参与反恐怖战争。As U.S. airports search ...