But those constant conversions cause power losses. For example, in conventional data centers, with hundreds of computers, electricity might be converted and “stepped down” in voltage five times before being used. All that heat must be removed by air-conditioners, which consumes more power.

In a data center redesigned to use more direct current, monthly utility bills can be cut by 10 to 20 percent, according to Trent Waterhouse, vice president of marketing for power electronics at General Electric.

“You can cut the number of power conversions in half,” Mr. Waterhouse said.

On a far smaller scale, SAP spent $128,000 retrofitting a data center at its offices in Palo Alto, Calif. The project cut its energy bills by $24,000 a year.

By Ben Charny, CNET News.com
Monday, January 10 2005 11:55 AM

At least five countries have begun developing an alert system using cell phone text messages, a response to the catastrophic Asian tsunami that exposed flaws in present-day early warning schemes.

Discussions among officials in India, Indonesia, Sri Lanka and Thailand, which were hard hit by the killer tsunami, along with France, have begun in just the last few days, according to a source familiar with the plans.

The goal is to supplement older systems that proved little help for nations in the path of the immense waves in late December that have so far killed more than 140,000 people in 11 countries. Already emerging from the wreckage are tales of emergency workers and stricken residents using SMS (short message service) to aid in rescue efforts or keep in touch with loved ones. Sri Lankan officials have already used text messages to distribute information on how to get aid.

“We hope to have something tangible in place by mid-April,” said Greg Wilfahrt, executive vice president and co-founder of SMS.AC, a wireless e-mail provider that has relationships with carriers in 170 nations. The company has offered its infrastructure and carrier connections to become the basis of the SMS warning system. SMS.AC is also coordinating the talks between the various nations.

[...]
Using SMS as an early warning system makes sense in theory, though it would be immensely difficult to carry out, according to analysts. Because cell phone owners typically carry their handsets with them, cell phones could be a much more suitable means of relaying information instantly to those in harm’s way. Existing warning systems funnel warnings through various intermediaries and rely on televisions or radios.

Yankee Group analyst John Jackson said the effort could have an enormous upside, given that most phones now are capable of sending and receiving text messages. However, coordination could be a big headache. “It could mitigate the capital expense of setting up sirens and other bits of early warning systems,” he said. “But one of the major problems could be who’s going to assure that message actually gets through?”

http://asia.cnet.com/news/communications/0,39037080,39212474,00.htm