Current Group, a Germantown-based technology firm, has taken over an ordinary looking house in Bethesda and turned it into a laboratory for smart-grid technology, the system the company believes will bring the nation’s electricity grids into the digital age.
In the front yard stands a utility pole hooked up to a special transformer that connects the power lines to high-speed Internet. Hundreds of sensors attached to the lines monitor how power flows through the home. That information is then sent back to the utility company.
The process lets a utility more efficiently manage the distribution of electricity by allowing two-way communication between consumers and energy suppliers via the broadband network on the power lines. Based on data they receive from hundreds of homes, utilities can monitor usage and adjust output and pricing in response to demand. Consumers can be rewarded with reduced rates by cutting back on consumption during peak periods. And comput
A. The front yard of a house with a tall wooden pole.
B. A huge hook that can connect power lines together.
C. High-speed Internet access and Internet services.
D. Many monitors through which power flowing can be seen.
Likewise, it is (29) faster to make international payments (30) the Internet. Over recent years, the network of Internet banking Web sites (31) been developing very fast. Through the Internet, we can (32) make payments very fast. Transfers can be arranged and (33) online easily (34) quickly around-the-clock. The majority of payments over (35) Internet are credit card transactions. But more and more (36) are looking forward to online applications to better all aspects of their operations, (37) finance and international payments.
However, attention must be paid to security when we choose and make Internet (38) . The integrity of the transaction should be preserved, which is quite necessary and important. Businesses should not (39) their financial details onto a Web site until they are quite sure that the Web site is secure indeed so that others (40) themselves are unab
A. transactions
B. business
C. businesses
Every year television stations receive hundreds of complaints about the loudness of advertisements. However, federal rules forbid the practice of making ads louder than the programming. In addition, television stations always operate at the highest sound level allowed for reasons of efficiency. According to one NBC executive, no difference exists in the peak sound level of ads and programming. Given this information, why do commercials sound so loud
The sensation of sound involves a variety of factors in addition to its peak level. Advertisers are skillful at creating the impression of loudness through their expert use of such factors. One major contributor to the perceived loudness of commercials is that much less variation in sound level occurs during a commercial. In regular programming the intensity of sound varies over a large range. However, sound levels in commercials tend to stay at or near peak levels.
Other "tricks of the trade" are also used.
A. TV stations always operate at the highest sound levels
B. their sound levels are kept around peak levels
C. their sound levels are kept in the middle frequency ranges
D. unlike regular programs their intensity of sound varies over a wide range
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