New form of hard, elastic 'super' carbon developed

June 10, 2017

Washington, Jun 10: Scientists have developed a new form of ultra strong, lightweight carbon that is elastic and electrically conductive, and may serve a wide variety of applications from aerospace engineering to military armour.carbon

Researchers, including those from Carnegie Institution for Science in the US, pressurised and heated a structurally disordered form of carbon called glassy carbon.

They brought the glassy carbon starting material to about 250,000 times normal atmospheric pressure and heated to over 980 degrees Celsius to create the new strong and elastic carbon.

The newly created carbon is comprised of both graphite- like and diamond-like bonding motifs, which gives rise to the unique combination of properties, researchers said.

Under the high-pressure synthesis conditions, disordered layers within the glassy carbon buckle, merge and connect in various ways, they said.

This process creates an overall structure that lacks a long-range spatial order, but has a short-range spatial organisation on the nanometre scale.

"Light materials with high strength and robust elasticity like this are very desirable for applications where weight savings are of the utmost importance, even more than material cost," said Zhisheng Zhao, professor at Yanshan University in China.

"What is more, we believe that this synthesis method could be honed to create other extraordinary forms of carbon and entirely different classes of materials," Zhao added.

The study was published in the journal Science Advances.

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Agencies
August 2,2020

New Delhi, Aug 2: The National Commission for Women (NCW) has issued notice to some Bollywood celebrities named in a complaint against the promoter of a company for allegedly blackmailing and sexually assaulting a number of girls on the pretext of giving them a career in modelling.

Taking cognizance of the complaint filed by social activist Yogita Bhayana of People Against Rape in India (PARI), the NCW scheduled a virtual hearing presided by its chairperson on August 6.

The complaint against Sunny Verma, promoter of a company named IMG Ventures with its headquarter in Chandigarh, alleged that he has been blackmailing and sexually assaulting a number of girls on the pretext of giving them career in modelling.

PARI's Yogita Bhayana wrote a complaint letter to NCW chairperson Rekha Sharma.

"Through his company, he (Sunny Verma) invites the girls on the pretext of organising a Miss Asia contest with a claim that the contest will launch them as models. To make it look genuine, his company has also been taking an entry fee of Rs 2,950. Once the girls apply, they are alluded by the female accomplices of Sunny Verma to submit their nude pictures in order to get the better ranking in the contest," the complaint letter said on July 31.

It alleged that Verma, after receiving the pictures and sometimes even before, used to get in touch with the girls and ask for completely nude pictures and videos.

The complaint letter said that Verma also used to allude as well as threaten the girls to submit to his sexual desires if they were interested in modelling as a career or wish to win the contest.

"Once he established a physical relationship with the girls, he used to blackmail them for regular sexual favours. Many girls from across the country have suffered a sexual and mental assault from Sunny and his accomplices," said the complaint citing several letters, texts and audio clips from several girls as proof of this modus operandi of Sunny Verma and his company.

The complaint also said that Sunny Verma has been previously also arrested on charges of sexual assault.

"We would demand that NCW should investigate the case to its depth and get the guilty punished so that any other person should not dare to exploit these kinds of innocent girls on any pretext. It will be a message to people like Sunny Verma and all associated Bollywood stars. Looking forward to strict action from NCW against sexual offenders like Sunny Verma & others," the complaint said.

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Agencies
June 13,2020

The Brazilian government said that the Amazon rainforest witnessed deforestation of a record 829 sq km in May, the highest monthly level since 2015.

On Friday, the National Institute for Space Research (INPE) said that deforestation in the Amazon increased by 91 sq km compared to the same period last year, reports Xinhua news agency.

Between January and April, destruction of the forest by illegal loggers and ranchers rose 55 per cent, or a total of 1,202 sq km was wiped out, it said.

The Real-time Deforestation Detection system, a federal project created to monitor human activity in the Amazon, alerted authorities to the increase in the rate of destruction of the rainforest.

A recent study by the Amazon Environmental Research Institute (IPAM) warned that deforestation in 2020 could reach 11,900 sq km if the pace of May, June, and July follows the historical average.

Deforestation in the region has soared since President Jair Bolsonaro took office last year, according to conservation groups.

He has argued that more farming and mining in protected areas of the forest were the only way to lift the region out of poverty.

Bolsonaro's environmental policies have been widely condemned but he has rejected the criticism, saying Brazil remains an example for conservation.

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Agencies
May 31,2020

Cape Canaveral, May 31: SpaceX, the private rocket company of billionaire entrepreneur Elon Musk, launched two Americans into orbit from Florida on Saturday in a landmark mission marking the first spaceflight of NASA astronauts from U.S. soil in nine years.

A SpaceX Falcon 9 rocket lifted off from the Kennedy Space Center at 3:22 p.m. EDT (19:22 GMT), launching Doug Hurley and Bob Behnken on a 19-hour ride aboard the company’s newly designed Crew Dragon capsule bound for the International Space Station.

Just before liftoff, Hurley said, “SpaceX, we’re go for launch. Let’s light this candle,” paraphrasing the famous comment uttered on the launch pad in 1961 by Alan Shepard, the first American flown into space.

Minutes after launch, the first-stage booster rocket of the Falcon 9 separated from the upper second-stage rocket and flew itself back to Earth to descend safely onto a landing platform floating in the Atlantic.

High above the Earth, the Crew Dragon jettisoned moments later from the second-stage rocket, sending the capsule on its way to the space station.

The exhilarating spectacle of the rocket soaring flawlessly into the heavens came as a welcome triumph for a nation gripped by racially-charged civil unrest as well as ongoing fear and economic upheaval from the coronavirus pandemic.

The Falcon 9 took off from the same launch pad used by NASA’s final space shuttle flight, piloted by Hurley, in 2011. Since then, NASA astronauts have had to hitch rides into orbit aboard Russia’s Soyuz spacecraft.

“It’s incredible, the power, the technology,” said U.S. President Donald Trump, who was at Kennedy Space Center at Cape Canaveral in Florida for the launch. “That was a beautiful sight to see.”

The mission’s first launch attempt on Wednesday was called off with less than 17 minutes remaining on the countdown clock. Weather again threatened Saturday’s launch, but cleared in time to proceed with the mission.

SPACEFLIGHT MILESTONES

NASA chief Jim Bridenstine has said resuming launches of American astronauts on American-made rockets from U.S. soil is the space agency’s top priority.

“I’m breathing a sigh of relief, but I will also tell you I’m not gonna celebrate until Bob and Doug are home safely.” Bridenstine said.

For Musk, the launch represents another milestone for the reusable rockets his company pioneered to make spaceflight less costly and more frequent. And it marks the first time commercially developed space vehicles - owned and operated by a private entity rather than NASA - have carried Americans into orbit.

The last time NASA launched astronauts into space aboard a brand new vehicle was 40 years ago at the start of the space shuttle program.

Musk, the South African-born high-tech entrepreneur who made his fortune in Silicon Valley, is also chief executive of electric carmaker and battery manufacturer Tesla Inc. He founded Hawthorne, California-based SpaceX, formally known as Space Exploration Technologies, in 2002.

Hurley, 53, and Behnken, 49, NASA employees under contract to fly with SpaceX, are expected to remain at the space station for several weeks, assisting a short-handed crew aboard the orbital laboratory.

Boeing Co, producing its own launch system in competition with SpaceX, is expected to fly its CST-100 Starliner vehicle with astronauts aboard for the first time next year. NASA has awarded nearly $8 billion combined to SpaceX and Boeing for development of their rival rockets.

Trump also hailed the launch as a major advance toward the goal of eventually sending humans to Mars.

He was joined at the viewing by Musk, as well as Vice President Mike Pence, Commerce Secretary Wilbur Ross, Education Secretary Betsy DeVos, Florida congressman Matt Gaetz and Senator Rick Scott.

Earlier on Saturday, the crew bid goodbye to their families. Prior to climbing into a specially designed Tesla automobile for the ride to the launch site, Behnken told his young son, “Be good for mom. Make her life easy.”

During the drive, Behnken and Hurley passed former astronaut Garrett Reisman who held a sign saying, “Take me with you.”

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