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Submission Summary: 2 pending, 50 declined, 19 accepted (71 total, 26.76% accepted)

+ - New Technique to Develop Single Molecule Diode

Submitted by William Robinson
William Robinson writes: Under the direction of Latha Venkataraman, associate professor of applied physics at Columbia Engineering, researchers have designed a new technique to create a single-molecule diode, that has rectification ratio as high as 250, and 'ON' current as high as 0.1 microamps. The idea of creating a single-molecule diode was suggested by Arieh Aviram and Mark Ratner who theorized in 1974, which has been the 'holy grail' of molecular electronics ever since its inception to achieve further miniaturization, because single molecule represent the limit of miniaturization.

+ - MAVEN detects auroras in northern skies of MARS

Submitted by William Robinson
William Robinson writes: One day, when humans go to Mars, they might find that, occasionally, the Red Planet has green skies. In late Dec. 2014, NASA's MAVEN spacecraft detected evidence of widespread auroras in Mars's northern hemisphere. According to the MAVEN data, solar particles that caused the "Christmas lights" penetrated deeply into the Martian atmosphere---sparking auroras less than 100 km from the surface. That's lower than auroras on Earth, which range from 100 km to 500 km high. Auroras occur, both on Earth and Mars, when energetic particles from space rain down on the upper atmosphere. On Earth, these particles are guided toward the poles by our planet's global magnetic field. That's why auroras are seen most often around the Arctic and Antarctic. On Mars, there is no organized planetary magnetic field to guide the particles north and south—so they can go anywhere. The European Space Agency's Mars Express had also found ultraviolet glow coming from "magnetic umbrellas" in the southern hemisphere, ten years ago.

+ - Indian Spacecraft "Mangalyaan" Placed in MARS orbit

Submitted by William Robinson
William Robinson writes: The spacecraft called Mangalyaan (“Mar’s craft”) which was launched in November last year, slowed down just enough to touch the orbit early Wednesday (Indian Time), securing India a place in the elite global space club of Martian explorers. More than half of the 51 Mars missions launched globally have failed. India’s Mars entry is the fourth, after the United States, Europe and Russia. But India’s mission cost a fraction of NASA’s $670 million Maven which entered Mars on Sunday. The Curiosity Rover, which touched down on Mars in 2012, cost nearly $2 billion. By comparison, India’s $72 million Mars orbiter is the cheapest inter-planetary mission in the world.

+ - Mangalyaan's main engine test fired for 4 seconds.

Submitted by William Robinson
William Robinson writes: Before the spacecraft is scheduled to enter Mars orbit, Indian Space Research Organisation (Isro) scientists reignited the Mars Orbiter Mission spacecraft's main engine for four seconds as a trial. The liquid apogee motor (LAM) engine has been idle for about 300 days since the spacecraft left the Earth's orbit on a Martian trajectory on December 1, 2013. The short-duration test was to ensure that the engine is in good shape for the 24-minute crucial manoeuvre on Wednesday.

+ - Mangalyaan Gets Ready to Enter MARS Orbit

Submitted by William Robinson
William Robinson writes: India's Mars Orbiter Mission, known as Mangalyaan is now at a distance of just nine million kilometres from the red planet, and is scheduled to enter the orbit of Mars at 7.30 am on September 24. Mangalyaan was launched on 5th November 2013 by ISRO, presently busy planning to reduce the speed of the spacecraft through the process of firing the LAM engine and bring it to 1.6 km/sec, before it is captured by the planet's gravity.

+ - Snipping HIV-1 Out From Human Cells Achieved

Submitted by William Robinson
William Robinson writes: Scientists from Temple University School of Medicine have achieved a way to snip out the integrated HIV-1 genes for the very first time. They created molecular tools to delete the HIV-1 proviral DNA. When deployed, a combination of a DNA-snipping enzyme called a nuclease and a targeting strand of RNA called a guide RNA (gRNA) hunt down the viral genome and excise the HIV-1 DNA. From there, the cell's gene repair machinery takes over, soldering the loose ends of the genome back together – resulting in virus-free cells.

+ - Hunt for Gravitational Waves Begin as Black Hole Trio Discovered.

Submitted by William Robinson
William Robinson writes: Astronomers from Max Planck Institute for Radio Astronomy in Bonn, Germany, have discovered three closely orbiting supermassive black holes in a galaxy more than 4 billion light-years away. This is the tightest trio of black holes known to date. Researchers say the discovery will help astronomers hunt gravitational waves, the ripples in the curvature of spacetime that propagate as a wave, travelling away from the source.

+ - NASA Recreates Space Dust on Earth

Submitted by William Robinson
William Robinson writes: A team of NASA scientists has successfully replicated the process of formation of interstellar dust occurring in the atmosphere of a dying star in a specialized facility called the Cosmic Simulation Chamber (COSmiC). Scientists believe that dust grains are the building blocks of universe, enveloping dying stars and then getting eventually ejected into "interstellar medium lead" to be part of the formation of planet. During the COSmiC experiments, they could simulate gas-phase with high radiation environment by using cold argon gas filled with hydrocarbons sprayed into a vacuum, similar to the cosmic space that has average temperatures of less than negative 270 degrees Fahrenheit or about 100 degrees in Kelvin. The researchers formed and detected nanoparticles on the order of 10nm size grains varying from 100-500 nanometers and combined grains up to 1.5 micrometers in diameter

+ - A Star Cluster Thrown Out Of Galaxy At Hypervelocity Discovered

Submitted by William Robinson
William Robinson writes: According to these reports, A globular cluster of several thousand stars, compressed into a space just a few dozen light years apart, is thrown out of galaxy M87. The cluster, named as HVGC-1, is traveling at a rate of 2 million miles per hour. The discovery was made by Nelson Caldwell of the Harvard-Smithsonian Center for Astrophysics and his team while studying the space around the supergiant elliptical galaxy M87. Caldwell and colleagues think M87 might have two supermassive black holes at its center. The star cluster wandered too close to the pair, which picked off many of the cluster’s outer stars while the inner core remained intact. The black holes then acted like a slingshot, flinging the cluster away at a tremendous speed.

+ - Astronomers Discover Pair of Black Holes in Inactive Galaxy

Submitted by William Robinson
William Robinson writes: The Astronomers at XMM-Newton have detected a pair of supermassive black holes at the center of an inactive galaxy. Most massive galaxies in the Universe are thought to harbor at least one supermassive black hole at their center. And a pair of black holes is indication of strong possibility that the galaxies have merged. Finding black holes in quiescent galaxies is difficult because there are no gas clouds feeding the black holes, so the cores of these galaxies are truly dark. It can be only detected by this ‘tidal disruption event’,.

+ - NASA proposes "water world theory" for origin of life

Submitted by William Robinson
William Robinson writes: A new study from researchers at Nasa's Jet Propulsion Laboratory has proposed the "water world" theory as the answer to our evolution, which describes how electrical energy naturally produced at the sea floor might have given rise to life. While the scientists had already proposed this hypothesis called "submarine alkaline hydrothermal emergence of life" the new report assembles decades of field, laboratory and theoretical research into a grand, unified picture.

+ - New black holes found in Andromeda

Submitted by William Robinson
William Robinson writes: Astronomers have discovered 26 new likely black holes in the neighboring Andromeda galaxy — the largest haul of black hole candidates ever found in a galaxy apart from our own. The central region of the Andromeda galaxy is chock-full of black holes, according to extensive observations with NASA’s Chandra X-ray Observatory. 26 new stellar-mass black hole candidates have been identified, adding to nine previously known and bringing the grand total to 35. Scientists believe it may be 'tip of the iceberg'

+ - X-Ray Laser for creating supercharged particles->

Submitted by William Robinson
William Robinson writes: Scientists have found way to use X-Ray Laser for creating supercharged particles. The specific tuning of the laser's properties can cause atoms and molecules to resonate. The resonance excites the atoms and causes them to shake off electrons at a rate that otherwise would require higher energies. This could be used to create highly charged plasma.
Link to Original Source
Politics

+ - Tech companies and politics->

Submitted by William Robinson
William Robinson writes: There are iteresting stories about which tech companies are supporting Obama and which tech companies are supporting Romney. According the article, Obama's biggest donators features the likes of Microsoft, Google, IBM and Comcast whereas the only tech name on Romney's list is EMC. The tech community are choosing Obama because they see him as man with a similar vision
Link to Original Source

Money doesn't talk, it swears. -- Bob Dylan

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