Sci/Tech briefs

Physicists recreate old atomic model

When atoms were first discovered, they were compared with the solar system, and it was believed that the nucleus was like the sun and electrons revolved around it. Later, quantum mechanics contradicted this analogy and stated that electrons smear out over large areas.
Tom Gallagher and his team at the University of Virginia in Charlottesville, however, have come up with a model that represents the traditional view of the structure of an atom. They achieved this by trapping electrons and guiding their movement around the nucleus.

The concept is based on the principle of Lagrange points, which are regions of space where no gravity exists. The researchers used microwaves to counteract forces of the nucleus on the electron so that the electron was no longer influenced by the nucleus. Hence, the electron came under their control and they could guide it around the nucleus by moving the microwave source.

Source: New Scientist

Scientists find asteroid remains

Researchers have discovered 8.7 pounds of black jagged rocks in the Sudan desert. The rocks are leftovers of the asteroid 2008 TC3 and were full of small diamonds.

Scientists believe that the study of the rock gives them an idea about the history of planet formation and how to avoid a future asteroid-caused Armageddon.
The rocks are the remains of a specific asteroid that was a fireball plunging through the sky before it landed on the surface of earth. This asteroid burned 23 miles above the ground and is believed to be a part of the rocks that tried, but failed, to become a planet 4.5 billion years ago.

Source: TechNewsWorld

Google adds undo send tab to Gmail

Everyone at some point or another has sent out an e-mail that they never wanted to send. In order to fix this problem, Google has introduced a Gmail feature known as “Undo Send.”

The feature gives users five seconds to undo their send so they can fix their typos, correct their settings, or rewrite the entire message. When a Gmail user who enables this feature sends a message, an “Undo” button will pop up on the screen for five seconds. If the user hits this button within that time, Gmail will retrieve the message in draft form, allowing them to change it or delete it entirely.


Professor speaks at physics conference

Carnegie Mellon cosmologist Tiziana Di Matteo spoke on a panel at a recent meeting of the American Physical Society on computational physics. Her work focuses on black holes and evolution of the cosmos through the use of computer modeling. Her models simulate the galaxy formation using the TeraGrid system at the Pittsburgh Supercomputing center.

In her abstract for the conference, she wrote that recent advances in the field of cosmology have been mostly due to the use of computer modeling and that computer simulations can take into account factors like the effects of gravitational fields generated by dark matter and different galaxies.

Source: Pittsburgh Post-Gazette