Because vacuum tubes are used instead of switches and relays in increases the speed of the calculations, but it took technicians weeks to re-program and the machine required many hours of maintenance – 24 hours a day!
There were many problems with the first generation computers, like many things when they start out.
Multiple-choice tests are a pretty terrible way of measuring students’ understanding of complex concepts, but overextended teachers rely on fill-in-the-bubble exams because they’re easy to mark.
There may be a better alternative: Scientists have created software that can grade short-answer essays in five seconds—and a new paper in the A group of researchers, led by Elizabeth Beggrow at the Ohio State University, assessed science students’ understanding of key ideas about evolution using four methods: multiple-choice tests, human-scored written explanations, computer-scored written explanations, and clinical oral interviews.
Skeptics object that machines can be fooled and that robo-graders threaten “the idea that reading and writing are uniquely human.” While it’s obviously impossible for a robot to judge a paper’s creative or literary merit, being able to assign students essays rather than multiple choice tests could revolutionize science teaching.
Posted on March 22, 2013 The word ‘computer’ means someone or something who computes.
A computer is a general purpose device that has developed a lot over the years.
Could you live without a computer or any technology that uses the internet?
They were very expensive to make and run, slow and had limited application capabilities.
They also generated a lot of heat and used large amounts of electricity, the ENIAC used 160 kilowatts of electrical power!