Mission Accomplished: Sunita,Akihiko tackle ISS coolant leak

November 2, 2012

mission

Houston, November 2: Indian American record-setting NASA astronaut Sunita Williams along with another cosmonaut today troubleshot an ammonia leak in the International Space Station's cooling system, accomplishing the chief objective of their marathon six-hour excursion outside the orbiting lab.

Williams and Japanese space flyer Akihiko Hoshide ventured yesterday outside the space station at 1229 GMT (1759 IST) and just a little more than five hours later, they had reconfigured some coolant lines and deployed a spare radiator, isolating the leak.

"Suni and Aki, heartfelt congratulations to you," NASA astronaut Mike Fincke, who helped walk the astronauts through their tasks from mission control at the agency's Johnson Space Center in Houston, said at 1741 GMT (2311 IST).

"We accomplished just about everything we set out to do today. A big, huge congratulations to you guys on the ground for putting this together," Williams responded.


Each of the space station's eight huge solar panels has its own associated power system, and circulating ammonia helps cool this gear down.

The leak, which NASA and its space station partners first noticed in 2007, has the potential to affect one of these power channels if it's not fixed.

Today's Spacewalk, or extra-vehicular activity (EVA), a crucial step in that process was slated to last about 6 1/2 hours, and it proceeded pretty much on schedule.

By 0128 hrs IST, both astronauts had re-entered the space station through its airlock, and the spacewalk was officially over nine minutes later.

At the start of the spacewalk, Williams — commander of the station's current Expedition 33 — and Hoshide made their way over to the port side of the station's backbone-like truss.

They rejiggered some lines in the affected coolant system and installed a spare radiator.

NASA officials hope this stops the leak, which they suspect may be coming from the old (swapped-out) radiator.

If ammonia continues to escape, the station's operators will eventually have to try something else.

But there likely won't be an urgent need for a new fix, since the spare radiator should provide enough ammonia to keep the coolant system operating until next October or so, officials said.

It should come as no surprise that Williams and Hoshide ticked off their tasks efficiently today, for the two are seasoned space walkers.

In late August and early September, they replaced a vital power unit on the station over the course of two spacewalks, defeating an unexpectedly stubborn stuck bolt in the process.

Today's EVA was the seventh for Williams, the third for Hoshide and the 138th to depart from the station overall.




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News Network
July 11,2020

Jul 11: UK’s Prince Charles, at the ongoing India Global week 2020, has praised India’s sustainable way of life, as he emphasised on sustainable development amid the ongoing coronavirus pandemic. Addressing the summit through a video link from London, Prince Charles said, “The country’s (India’s) diversity and resilience is a personal inspiration for him and much to teach all,” reported the All India Radio.

The three-day summit is getting held on a virtual platform from July 9 to July 11 due to the ongoing COVID-19 pandemic. Around 75 sessions on subjects such as geopolitics, business, emerging technologies, banking, finance, pharmaceuticals, defence and security, and arts and culture are getting held. The summit is expected to bring together over 250 speakers and more than 5,000 participants for incisive discussion and lively debate over the three days.

During his address, Prince Charles said India’s philosophies and values have emphasised a sustainable way of life and a harmonious relationship between humanity and nature, the AIR report said.

He also informed that he spoke to Prime Minister Narendra Modi about the importance of sustainable living.

In his address, he also spoke about the ancient yogic concept of ‘Aparigraha’. “It’s the time when the world learnt this ancient wisdom from India as it seeks revival amid the pandemic, he said as reported by the AIR news.

As the countries across the globe are reeling under the corornavirus pandemic, he emphasised on sustainable development to overcome the crisis. He said, “We have an unparalleled opportunity to put people and planet at the heart of global value creation and move to sustainable markets for long-term value, balancing natural, social, and physical capital.”

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Agencies
June 12,2020

Kabul, Jun 12: A blast in a mosque during Friday prayers in the western part of capital Kabul has killed at least four people and wounded many more, Afghanistan's interior ministry said.

"Explosives placed inside the Sher Shah Suri Mosque exploded during Friday prayers," said a statement issued by the ministry, which added that the mosque's prayer leader Mofleh Frotan was among those killed.

Interior ministry spokesman Tariq Arian said police have cordoned off the area and helped move the wounded to ambulances and nearby hospitals.

No group immediately claimed responsibility for the attack but a mosque attack earlier this month was claimed by an ISIL (or ISIS) group affiliate, headquartered in eastern Afghanistan's Nangarhar province.

"Interestingly, every time you have the peace process gaining some momentum and pace, you have these kinds of attacks in the country," Habib Wardak, a national security analyst based in Kabul, told Al Jazeera.

"The Islamic State group claimed responsibility for the attack that happened last week on a mosque in Kabul, so despite the fact that you have these news and press conference from the government that they have eliminated ISIL, how can they conduct such sophisticated operations?"

Friday's blast had parallels to one earlier this month, when an explosion tore apart a famous Kabul mosque and led to the death of renowned Afghan cleric Maulvi Ayaz Niazi.

"In this attack, the imam seems to be the target, not the rest of the crowd. These are the imams who have supported the peace process with the Taliban movement," Wardak said.

"The other political aspect for these kinds of attacks is that there are peace spoilers trying to convey a message that peace with the Taliban will not eradicate violence in the country because you have ISIL."

Violence has spiked in recent weeks in Afghanistan with most of the attacks claimed by the ISIL affiliate.

The United States blamed the armed group for a horrific attack last month on a maternity hospital in the capital that killed 24 people, including two infants and several new mothers.

The ISIL affiliate also took responsibility for an attack on a bus carrying journalists in Kabul on May 30, killing two.

It also claimed credit for an attack on the funeral of a strongman loyal to the government last month that killed 35 people.

Meanwhile, the US is attempting to broker peace talks between the Afghan government and the Taliban to end 18 years of war.

Washington's peace envoy Zalmay Khalilzad was in the region earlier this week trying to resuscitate a US peace deal with the Taliban.

The peace deal signed in February calls for the withdrawal of the US and NATO troops from Afghanistan in return for a commitment by the Taliban to not launch attacks on the US or its allies.

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Agecnies
July 13,2020

Moscow, Jul 13: Russia has become the first nation to complete clinical trials of a COVID-19 vaccine on humans. Chief researcher Elena Smolyarchuk, who heads the Center for Clinical Research on Medications at Sechenov University, told Russian news agency TASS on Sunday that the human trials for the vaccine have been completed at the university and the volunteers will be discharged soon.

"The research has been completed and it proved that the vaccine is safe. The volunteers will be discharged on July 15 and July 20," Smolyarchuk was quoted as saying in the report.

Though the results have been favourable with respect to the medication’s effectiveness, no further information was provided on when this vaccine would enter commercial production stage.

Russia had allowed clinical trials of two forms of a potential COVID-19 vaccine developed by the Gamaleya National Research Center for Epidemiology and Microbiology on June 18.

The first vaccine, in the form of a solution for intramuscular administration, was carried out at the Burdenko Military Hospital.

Another vaccine, in the form of a powder for the preparation of a solution for intramuscular administration, was carried out at Sechenov First Moscow State Medical University.

The first stage of research on the vaccine at Sechenov University involved a group of 18 volunteers and the second group involved 20 volunteers.

After vaccination, all volunteers were expected to remain in isolation in a hospital for 28 days.

Earlier, results of the COVID-19 vaccine tests performed on a group of volunteers in Russia showed that they were developing immunity to the coronavirus.

"The data obtained by the Gamalei National Research Center for Epidemiology and Microbiology, proves that volunteers of the first and second groups are forming an immune response after injections of the vaccine against the coronavirus," according to an earlier statement from the Russian Defense Ministry.

Russia has reported 719,449 cases and 11,188 deaths to date.

There are at least 21 vaccines currently under key trials, according to the World Health Organisation (WHO).

The overall number of global COVID-19 cases crossed 12.9 million, while the deaths have increased to more than 5,69,000, according to Johns Hopkins University in the US.

As of Monday morning, the total number of cases stood at 1,29,10,357, while the fatalities rose to 5,69,128.

The US accounted for the world's highest number of infections at over 33 lakh. Brazil came in the second place with over 18 lakh infections. India is third worst affected with over 8.7 lakh people reported to have COVID-19.

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