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Microsoft Device Helps Police Pluck Evidence From Cyberscene Of CrimeBy Dr arvind, Section Computer Gupshup
One train leaves Station A at 6 p.m. traveling at 40 miles per hour toward Station B. A second train leaves Station B at 7 p.m. traveling on parallel tracks at 50 m.p.h. toward Station A. The stations are 400 miles apart. When do the trains pass each other?
Entranced, perhaps, by those infamous hypothetical trains, many educators in recent years have incorporated more and more examples from the real world to teach abstract concepts. The idea is that making math more relevant makes it easier to learn. That idea may be wrong, if researchers at Ohio State University are correct. An experiment by the researchers suggests that it might be better to let the apples, oranges and locomotives stay in the real world and, in the classroom, to focus on abstract equations, in this case 40 (t + 1) = 400 - 50t, where t is the travel time in hours of the second train. (The answer is below.)
 Dr. Kaminski and her colleagues Vladimir M. Sloutsky and Andrew F. Heckler did something relatively rare in education research: they performed a randomized, controlled experiment. Their results appear in Friday's issue of the journal Science. Though the experiment tested college students, the researchers suggested that their findings might also be true for math education in elementary through high school, the subject of decades of debates about the best teaching methods. In the experiment, the college students learned a simple but unfamiliar mathematical system, essentially a set of rules. Some learned the system through purely abstract symbols, and others learned it through concrete examples like combining liquids in measuring cups and tennis balls in a container. Then the students were tested on a different situation -- what they were told was a children's game -- that used the same math. "We told students you can use the knowledge you just acquired to figure out these rules of the game," Dr. Kaminski said. Click on "Full Story" for more...
The social aspects of Web 2.0 are like "new digital cities," Smith said. Publishers, interested in creating huge audiences to sell advertising, let people participate anonymously.
That's allowing "criminals to infiltrate the community, become part of the conversation and persuade people to part with personal information," Smith said. Children are particularly at risk to anonymous predators or those with false identities. "Criminals seek to win a child's confidence in cyberspace and meet in real space," Smith cautioned. Expertise and technology like COFEE are needed to investigate cybercrime, and, increasingly, real-world crimes. "So many of our crimes today, just as our lives, involve the Internet and other digital evidence," said Lisa Johnson, who heads the Special Assault Unit in the King County Prosecuting Attorney's Office. A suspect's online activities can corroborate a crime or dispel an alibi, she said. The 35 individual law-enforcement agencies in King County, for example, don't have the resources to investigate the explosion of digital evidence they seize, said Johnson, who attended the conference. "They might even choose not to seize it because they don't know what to do with it," she said. "... We've kind of equated it to asking specific law-enforcement agencies to do their own DNA analysis. You can't possibly do that." Johnson said the prosecutor's office, the Washington Attorney General's Office and Microsoft are working on a proposal to the Legislature to fund computer forensic crime labs. Microsoft also got credit for other public-private partnerships around law enforcement. Jean-Michel Louboutin, Interpol's executive director of police services, said only 10 of 50 African countries have dedicated cybercrime investigative units. "The digital divide is no exaggeration," he told the conference. "Even in countries with dedicated cybercrime units, expertise is often too scarce." He credited Microsoft for helping Interpol develop training materials and international databases used to prevent child abuse. Smith acknowledged Microsoft's efforts are not purely altruistic. It benefits from selling collaboration software and other technology to law-enforcement agencies, just like everybody else, he said. By Benjamin J. Romano Seattle Times Technology Reporter Or Microsoft device helps police pluck evidence from cyberscene of crime
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