Saturday, August 7, 2010

AP Enterprise: Scientists think Gulf can recover


From the Associated Press on Google News...

"Want to know the future of the oil-stained Gulf of Mexico ecosystem? Look first to its muddy, polluted past.

The recent ecological history of the Gulf gives scientists reason for hope. In an extensive survey of Gulf of Mexico researchers by The Associated Press, at least 10 of them separately volunteered the same word to describe the body of water: "resilient."

This is buttressed by a government report that claims that all but 53 million gallons of the leaked oil from BP's Deepwater Horizon well are gone. The report issued Wednesday says the cleanup extracted a lot of it, but the natural processes that break up, evaporate and dissolve oil took care of 84 million gallons — more than twice the amount human efforts removed.

At the same time, more progress was made in sealing the well for good as BP finished pumping cement into it on Thursday."

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Thursday, August 5, 2010

NASA Mind Training Tackles Motion Sickness


From Discovery News...

"Is quelling motion sickness a question of mind over matter? Possibly so, given the proper training, say researchers who are testing a NASA biofeedback system developed to try to help astronauts adjust to microgravity.

The disorientating effects of spaceflight will sound familiar to anyone who has ever grown dizzy, nauseous or faint riding in a car, flying in an airplane or sailing on a ship."

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Wednesday, August 4, 2010

The Strata: World’s First Skyscraper with Built-in Wind Turbines


From Planetsave.com...

"It rises 143 meters above central London, making it the district’s tallest residential structure. Its nickname is ‘The Razor” owing to its sharp angular design. It’s also the first skyscraper to have electricity-generating wind turbines built into its core design “fabric”.

In a city not as suited for solar power, as say Phoenix , AZ, London is now starting to take advantage of one of its more plentiful, renewable resources: wind.

While there are other, much taller buildings with turbines added on following the finish of their primary construction, the Strata has included them in the architectural plan from the get-go. The threesome of integrated wind turbines, at full capacity, will generate 8% of the buildings energy needs. This may not seem like very much, but it amounts to several dozen mega (million) watt hours annually–saving the owners and residents a great deal of money (and freeing up extra capacity from traditional utilities)."

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Monday, August 2, 2010

Plagiarism Lines Blur for Students in Digital Age


From the New York Times...

"At Rhode Island College, a freshman copied and pasted from a Web site’s frequently asked questions page about homelessness — and did not think he needed to credit a source in his assignment because the page did not include author information.

At DePaul University, the tip-off to one student’s copying was the purple shade of several paragraphs he had lifted from the Web; when confronted by a writing tutor his professor had sent him to, he was not defensive — he just wanted to know how to change purple text to black.

And at the University of Maryland, a student reprimanded for copying from Wikipedia in a paper on the Great Depression said he thought its entries — unsigned and collectively written — did not need to be credited since they counted, essentially, as common knowledge.

Professors used to deal with plagiarism by admonishing students to give credit to others and to follow the style guide for citations, and pretty much left it at that.

But these cases — typical ones, according to writing tutors and officials responsible for discipline at the three schools who described the plagiarism — suggest that many students simply do not grasp that using words they did not write is a serious misdeed."

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A theory of power-law distributions in financial market fluctuations

From Letters to Nature...

"Insights into the dynamics of a complex system are often gained by focusing on large fluctuations. For the financial system, huge databases now exist that facilitate the analysis of large fluctuations and the characterization of their statistical behaviour [1,2]. Power laws appear to describe histograms of relevant financial fluctuations, such as fluctuations in stock price, trading volume and the number of trades [3-10]. Surprisingly, the exponents that characterize these power laws are similar for different types and sizes of markets, for different market trends and even for different countries--suggesting that a generic theoretical basis may underlie these phenomena. Here we propose a model, based on a plausible set of assumptions, which provides an explanation for these empirical power laws. Our model is based on the hypothesis that large movements in stock market activity arise from the trades of large participants. Starting from an empirical characterization of the size distribution of those large market participants (mutual funds), we show that the power laws observed in financial data arise when the trading behaviour is performed in an optimal way. Our model additionally explains certain striking empirical regularities that describe the relationship between large fluctuations in prices, trading volume and the number of trades."

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A Richter Scale for Markets


From the New York Times...

"It’s tempting to pull out the old earthquake metaphor when talking about the latest financial crises. How else to describe the economic devastation — the tremors in the subprime mortgage market, the seismic collapse of Lehman Brothers, and the aftershocks reverberating in Europe?

But some academics are now taking the metaphor seriously, pursuing a new approach to economics they call econophysics. The field represents a significant break from traditional economics, by studying financial earthquakes in much the same way geologists study those on terra firma. “New approaches are needed to address the fundamental and practical challenges of our financial, economic and social system,” a group of econophysicists wrote recently in an open letter to George Soros, the billionaire investor and philanthropist."

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Wednesday, July 21, 2010

Tuesday, July 20, 2010

We Must Stop the Avalanche of Low-Quality Research


From The Chronicle of Higher Education....

"Everybody agrees that scientific research is indispensable to the nation's health, prosperity, and security. In the many discussions of the value of research, however, one rarely hears any mention of how much publication of the results is best. Indeed, for all the regrets one hears in these hard times of research suffering from financing problems, we shouldn't forget the fact that the last few decades have seen astounding growth in the sheer output of research findings and conclusions. Just consider the raw increase in the number of journals. Using Ulrich's Periodicals Directory, Michael Mabe shows that the number of "refereed academic/scholarly" publications grows at a rate of 3.26 percent per year (i.e., doubles about every 20 years). The main cause: the growth in the number of researchers."

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Taking Lessons From What Went Wrong


From The New York Times...

"Disasters teach more than successes.

While that idea may sound paradoxical, it is widely accepted among engineers. They say grim lessons arise because the reasons for triumph in matters of technology are often arbitrary and invisible, whereas the cause of a particular failure can frequently be uncovered, documented and reworked to make improvements.

Disaster, in short, can become a spur to innovation."

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Wednesday, July 14, 2010

'Elegance in Science'

From insidehighered.com...

"Ian Glynn is a physiologist with a passion for a concept not usually associated with his field: elegance. Specifically, its application and relevance across a wide range of scientific disciplines, from physiology to physics, astronomy to neurology. In his new book, Elegance in Science: The Beauty of Simplicity (Oxford University Press), Glynn gives examples of elegance from each of these subjects and several others, showing how elegance crops up in places where it might be expected (in the mathematics and mechanics of Archimedes) and where it might not be (in the nerve fibers of a giant squid)."

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