The Brain and the Computer
Some recent developments in the computer industry make scientists predict that the gap between human beings and machines will be closed about the year 20000.To understand the significance of this prediction let us compare the human brain with existing computers. The brain consumes electrical energy at the rate of 25 watts and occupies a volume of one tenth of a cubic foot. The brain houses between 10 billion and 100 billion items of information. Every brain cell is directly connected to many other cells. As a result, the cells in which information is stored can communicate with thousands of other cells.However, the computer consumes 1000,000 watts of electrical power and occupies hundreds of cubic feet of space. Its million items of immediately accessible information. In contrast, the computer memory is like a cell of n pigeonholes, with no thinking capacity and no connections elsewhere.In a word, the electronic brains are hopelessly inadequate in comparison with the human brains.
暫無解析
People throw things away and buy new ones instead of repairing them and using again. What do you think may be the reasons for this? What problems might this cause in society?
On Open Policy
More and more companies are allowing employees to work at home. Do you think this is a positive or negative development?
An increasing number of museums tend to charge admission fees from tourists rather than providing service free of charge. Do you think the advantages outweigh the disadvantages?
The restoration of old buildings in major cities throughout the world often involves numerous government expenditure. This money will bring more benefits if it is used to provide new housing or road development.To what extend do you agree or disagree.
