daurtanyn - Slashdot User

Submission + - Invariant Set Postulate - geometrical cosmology

Submitted by daurtanyn on Tuesday August 25, 2009 @08:48PM

daurtanyn writes: I came across this news item and thought it merited passing along.

World views make a lot of difference in how one interprets the
world. What we can measure, what mathematics can predict, and what
we experience in our world is assisted by the mental frameworks
with which we perceive what we learn.

About a hundred years ago relativity and the inherent differences
in perception due to reference frames made its way into our mental framework.

This new postulate may make the same adjustment to our view in this century.

Here is a popularized article with a fairly good summary.
http://www.physorg.com/news169725980.html

And here is the actual paper.
http://rspa.royalsocietypublishing.org/content/early/2009/07/28/rspa.2009.0080.full.pdf

Hubert

Submission + - U.S. students behind in math, science (cnn.com)

Submitted by tukang on Tuesday August 25, 2009 @06:45PM

tukang writes: American children aren't necessarily getting smarter or dumber, but that might not be good enough to compete globally, according to numbers cited Tuesday by Secretary of Education Arne Duncan. He noted a special analysis put out last week by the National Center for Education Statistics that compares 15-year-old U.S. students with students from other countries in the Organization for Economic Development. It found the U.S. students placed below average in math and science. In math, U.S. high schoolers were in the bottom quarter of the countries that participated, trailing countries including Finland, China and Estonia. According to the report, the U.S. math scores were not measurably different in 2006 from the previous scores in 2003. But while other countries have improved, the United States has remained stagnant.

http://www.cnn.com/2009/US/08/25/students.science.math/index.html

Air Force & NASA Fire Off Green Rocket 157

Posted by kdawson on Monday August 24, 2009 @11:57PM from the one-of-these-days-alice dept.

coondoggie writes "NASA and the Air Force said today they had successfully launched a 9-ft. rocket 1,300 feet into the sky, powered by aluminum powder and water ice. This combination of fuel elements, referred to as ALICE, has the potential to replace some liquid or solid propellants. The technology is being developed at Purdue University and Pennsylvania State University. Aside from its environmental benefiits, ALICE has the advantage that it could be manufactured in far-away places, such as the moon or Mars, instead of being transported to distant horizons at great cost, researchers said."

Comment The application "screen" might fit this request (Score 1) 166

by daurtanyn on Saturday February 14, 2009 @12:15PM (#26856271) Attached to: Red Hat Enlists Community Help To Fight Patent Trolls

There was a popular app called "screen" which allowed switching between multiple contexts and workspaces.

I used it all the time to make the best use of (then) limited desktop real estate. In that era, big bitmapped displays were a rare luxury in the marketplace.

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