Under the direction of Latha Venkataraman, an Indian- American scientist, a team of Columbia Engineering has created a single-molecule electronic device. This team is the first to develop a single-molecule diode that may have real-world technological applications for nanoscale devices. Their paper, ‘Single-Molecule Diodes with High On-Off Ratios through Environmental Control’ was published on May 25 in Nature Nanotechnology.
“Our new device represents the ultimate in functional miniaturization that can be achieved for an electronic device,” said Venkataraman as reported by IANS.
“Constructing a device where the active elements are only a single molecule has long been a tantalizing dream in nanoscience”, she added.
The idea of creating a single-molecule diode was suggested by Arieh Aviram and Mark Ratner who theorized in 1974 that a molecule could act as a rectifier, a one-way conductor of electric current. Since then the researchers have been exploring the charge-transport properties of molecules.
As per the report Venkataraman and her team are now working on understanding the fundamental physics behind their discovery and trying to increase the rectification ratios they observed, using new molecular systems.
Gurbir S Grewal is nominated to be the next attorney general of New Jersey, US
He would be the first Sikh to assume the top state law enforcement position
In a historic first, a distinguished Sikh public prosecutor “who has experienced hate and intolerance first-hand” has been nominated to be the next attorney general of the US state of New Jersey.
If Gurbir S. Grewal’s nomination by Democrat Governor-elect Phil Murphy is approved by the State Senate early next year, he will be the first Sikh to assume the top state law enforcement position in the United States and the second Indian-American, after Kamala Harris, who held the position in California before her election to the US Senate.
Announcing the nomination in the state capital, Trenton, on Tuesday, Murphy said: “In light of all that is being thrown at us by the president, we need an attorney general unafraid to join our fellow states in using the law to protect all New Jersey residents.”
Grewal, 44, is the prosecutor of Bergen County, an important district across the river from New York city. He was appointed to by the current Republican Governor Chris Christie and that is likely to mute any opposition the senate.
Symbolic of the public acceptance of minorities despite scattered incidents of bigotry, two Sikhs were elected mayors last month, Ravi Bhalla in Hoboken, New Jersey, and Preet Didbal in Yuba City, California.
Vin Gopal, who became the first Indian-American to be elected to the New Jersey State Senate last month, said that Grewal is someone “not only eminently qualified, but who will bring a perspective to the office that is diverse and long-overdue.”
After Murphy made the announcement, Grewal said: “I wanted to give back to a country that has given us and other immigrant families like us so much.”
Turning to his three daughters, Kyrpa, Mayher and Mahek, who were with him, he said: “As someone who has experienced hate and intolerance first-hand throughout my life, I wanted to work to ensure we all live in and that the three of you grow up in a fair and just society.”
Grewal added: “I wanted to perhaps also show people that while I and others like me may look different or worship differently, that we, too, are committed to this country.”
Hailing Grewal’s nomination, Rajwant Singh, the co-founder of the National Sikh Campaign, said: “These are exactly the kind of role models our youngsters need to feel proud of being a Sikh and an American.”
“While America could be seen having a very polarized situation politically and yet there are some very shining moments to show that people of all backgrounds can aspire for top positions,” he added.
South Asian Bar Association President Rishi Bagga, said: “The decision to appoint a visible minority as the chief law enforcement officer for New Jersey reflects the diversity of the state and of the US, and is especially important in a time where minorities and immigrants have often felt targeted by law enforcement.”
Attorney General is a very powerful position New Jersey heading the Department of Law and Public Safety, which includes the state police.
Grewal has earlier served as an assistant federal prosecutor in New York and in New Jersey, where he was also the chief of the Economic Crimes Unit.
In the administration of former President Barack Obama, Indian Americans have held senior law positions. Neal Kumar Katyal was an Acting Solicitor General.
Sri Srinivasan, now a federal appeals court judge in Washington, did a stint as the Principal Deputy Solicitor General.
Vanita Gupta was the Principal Deputy Assistant Attorney General and headed the Justice Department’s Civil Rights Division.
US President Donald Trump has appointed Uttam Dhillon to be his special assistant and associate counsel. (IANS)
Hawking said everyone has a role to play in making sure that this generation and the next are fully engaged with the study of science at an early level to create “a better world for the whole human race.”
Lisbon, November 7, 2017 : Technology can hopefully reverse some of the harm caused to the planet by industrialization and help end disease and poverty, but artificial intelligence (AI) needs to be controlled, physicist Stephen Hawking said on Monday.
Hawking, a British cosmologist who was diagnosed with motor neuron disease aged 21, said technology could transform every aspect of life but cautioned that artificial intelligence poses new challenges.
He said artificial intelligence and robots are already threatening millions of jobs — but this new revolution could be used to help society and for the good of the world such as alleviating poverty and disease.
“The rise of AI could be the worst or the best thing that has happened for humanity,” Stephen Hawking said via telepresence at opening night of the 2017 Web Summit in Lisbon that is attended by about 60,000 people.
“We simply need to be aware of the dangers, identify them, employ the best possible practice and management and prepare for its consequences well in advance.”
Hawking’s comments come during an escalating debate about the pro and cons of artificial intelligence, a term used to describe machines with a computer code that learns as it goes.
Silicon Valley entrepreneur Elon Musk, who is chief executive of electric car maker Tesla Inc and rocket company SpaceX, has warned that AI is a threat to humankind’s existence.
But Microsoft co-founder Bill Gates, in a rare interview recently, told the WSJ Magazine that there was nothing to panic about.
Stephen Hawking said everyone has a role to play in making sure that this generation and the next are fully engaged with the study of science at an early level to create “a better world for the whole human race.”
“We need to take learning beyond a theoretical discussion of how AI should be, and take action to make sure we plan for how it can be,” said Stephen Hawking, who communicates via a cheek muscle linked to a sensor and computerized voice system.
“You all have the potential to push the boundaries of what is accepted, or expected, and to think big. We stand on the threshold of a brave new world. It is an exciting — if precarious — place to be and you are the pioneers,” he said. (VOA)
New York, Oct 13: Astronomers have discovered that a Sun-like star lurking around 350 light-years away consumed the rocky equivalent of 15 Earths.
Dubbed Kronos after the child-eating Titan of Greek mythology, the star is the clearest and most dramatic case yet of a Sun-like star consuming its own planets, said Semyeong Oh, astrophysicist at Princeton University in New Jersey and lead author of the study.
“Even if our Sun ate the entire inner solar system, it wouldn’t come close to the anomaly we see in this star,” study co-author David Hogg from the Flatiron Institute in New York added.
The research did not begin as a hunt for a planet-eater.
Oh was analysing a catalog of new star data collected by the European Space Agency’s Gaia spacecraft for pairs of stars with similar speeds and trajectories.
Such duos are typically twin stars that formed close together from the same ingredients.
The analysis ultimately led to the identification of Kronos and its lesser known brother Krios.
Their official designations are HD 240430 and HD 240429, and they are both about 350 light years from Earth.
The keys to the discovery were first confirming that the widely separated pair are in fact a binary pair, and secondly observing Kronos’ strikingly unusual chemical abundance pattern, Oh explained in a statement released by the Princeton University.
Other co-moving star pairs have had different chemistries, Oh explained, but none as dramatic as Kronos and Krios.
Most stars that are as metal-rich as Kronos “have all the other elements enhanced at a similar level,” she said, “whereas Kronos has volatile elements suppressed, which makes it really weird in the general context of stellar abundance patterns.”
In other words, Kronos had an unusually high level of rock-forming minerals, including magnesium, aluminium, silicon, iron, chromium and yttrium, without an equally high level of volatile compounds — those that are most often found in gas form, like oxygen, carbon, nitrogen and potassium, the study said. (IANS)