Sunday, July 19, 2009

Transition Signals (using appropriate transition signal)


One stereotype about North American says that they are obsessed with time. It sometimes seems true that for North Americans, time seems as valuable as money. Also they even say, "Time is money." In fact have you noticed how many verbs can be followed by both time and money? For example you can spend time, save time, lose time, find time make time, waste time, and run out of time. Similarly you can spend, save, lose, find, make, waste, and run out of money. Second North Americans seem to regard time as a "thing" that one can own. You can have time, buy time, and take time. (One wonders how much it costs and where it is taken.) A third piece of evidence that North Americans are obsessed with time is their fanaticism about always being on time. Indeed people who are habitually late risk punishment ranging from frowning disapproval to losing their jobs. The final and most convincing proof is that these poor people sometimes take courses in their time management! That is really overdoing it, don't you agree?

Move Over, DVD. Here Comes BD!

First, CDs brought digital sound into our homes. Then DVD technology brought digital sound and video and revolutionized the movie industry. Soon there will be furthermore revolution: Blu-ray discs (BDs). A Blu-ray disc will have several advantages. First it has an enormous data storage capacity. A single-sided DVD can hold 4.7 gigabytes of information, about the size of an average 2-hour movie. A single-sided BD, on the other hand, can hold up to 27 gigabytes, enough for 13 hours of standard video. A second advantage is that a BD can record, store, and play back high-definition video. The cost will be about 50 gigabytes, enough for 4.5 hours of high-definition video. The cost will be about the same. Furthermore, a BD has a higher data transfer rate -36 megabits per second- than today's DVD, which transfer at 10 megabits per second. As a result a BD can record 25 gigabytes of data in just over an hour and a half. Indeed because of their large storage capacity and comparable cost. BDs will probably take over the market when they become widely available.

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