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.




Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
June 26,2020

Washington, Jun 26: The United States reported more than 39,000 new coronavirus cases on Thursday, its highest-ever single-day count as the government relaxed restrictions and is downplaying the threat of the deadly virus.

According to the Washington Post, experts believe there is a troubling lack of consistent, unified messaging from President Donald Trump and Vice President Mike Pence. They have downplayed the danger and denigrated effective disease defences such as mask-wearing, testing, and social distancing.

Churches, beaches, and bars are filling up with people and so are hospital beds, the report said.

The counties home to Dallas, Phoenix, and Tampa all reported record-high averages on at least 15 straight days in June.

The hardest-hit states are California, Texas, Florida and those that thought they had the virus under control, like Utah and Oregon.

"I think the politicians are in denial," said Kami Kim, director of the Division of Infectious Disease and International Medicine at the University of South Florida.

The chief of the Division of Pediatric Infectious Diseases at the University of Utah Health, Andrew T. Pavia, is of the view that the push to reopen quickly even as cases climb sends a dangerous and inaccurate message.

"On the one hand, you get messages from politicians and the business community that we have to go, go, go and open up," he said. "On the other hand, you're seeing epidemiological indicators that we still have to be very careful."

"It's cognitive dissonance," he added.

The Trump administration has tried to downplay the rising number. Pence called concerns about another surge of infections "overblown," the product of media "fearmongering."

Some governors have followed the administration's lead, blaming rising caseloads on more testing.

Testifying before a congressional committee this week, Anthony S. Fauci, the nation's top infectious-diseases expert, said the new cases were "a disturbing surge" spurred by community transmission rather than testing.

"That's something I'm really quite concerned about," Fauci said. "A couple of days ago, there were 30,000 new infections. That's very disturbing to me."

Several states like Arizona, Arkansas, the Carolinas, Mississippi, Tennessee, Texas and Utah have recently reported new highs in the number of coronavirus patients hospitalized.

"We're seeing a 40 per cent increase in the last two weeks in hospitalizations," said Dallas County Judge Clay Jenkins (D), the jurisdiction's top elected official. "We're by far at our record numbers, and we're at record numbers in north Texas. Houston is at a record, the state is at a record." The Texas Medical Center in Houston, a massive medical complex, reported Thursday that 100 per cent of the beds in its intensive care unit are occupied.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
January 23,2020

Beijing, Jan 23: China is putting on lockdown a city of 11 million people considered the epicenter of the new coronavirus outbreak that has killed 17 and infected nearly 600 people, as health authorities around the world work to prevent a global pandemic.

The previously unknown coronavirus strain is believed to have emerged late last year from illegally traded wildlife at an animal market in the central Chinese city of Wuhan. Cases have been detected as far away as the United States, stoking fears the virus is already spreading worldwide.

Wuhan's local government said it would shut down all urban transport networks and suspend outgoing flights from the city as of 10 a.m. (0200 GMT) Thursday, state media reported, adding that the government is urging citizens to not leave the city in the absence of special circumstances.

Contrasting with its secrecy over the 2002-03 Severe Acute Respiratory Syndrome (SARS), which killed nearly 800 people, China's communist government has this time given regular updates to try to avoid panic as millions of people travel for the Chinese Lunar New Year holiday.

Chinese authorities have confirmed 571 cases and 17 deaths as of end-Wednesday, state television reported on Thursday. There are eight other known cases around the world - Thailand has confirmed four cases, while the United States, Taiwan, South Korea and Japan have each reported one.

Vice Premier Sun Chunlan said during a visit to Wuhan that authorities needed to be open about the spread of the virus and their efforts to contain it, the official Xinhua news agency reported on Thursday, comments likely to reassure global health experts.

After a meeting at its Geneva headquarters on Wednesday, the World Health Organization (WHO) said it would decide on Thursday whether to declare the outbreak a global health emergency, which would step up the international response.

If it does so, it will be the sixth international public health emergency to be declared in the last decade.

WHO Director-General Tedros Adhanom Ghebreyesus told reporters in Geneva that China's actions so far were "very strong" but called in Beijing to take "more and significant measures to limit or minimise the international spread".

"We stressed to them that by having a strong action not only they will control the outbreak in their country but they will also minimise the chances of this outbreak spreading internationally. So they recognise that," he said.

A senior U.S. State Department official also called on China to "play a bigger role in global health so they taking more and significant measures to limit or minimise the international spread".

"The lack of transparency in the past, especially with SARS ... gives us concern that that may be the case here," the official said, adding however that there were "positive signs that they have taken action in Wuhan".

Fears of a pandemic initially spooked markets but they regained their footing on Wednesday, with investors citing the robust response from authorities as reassuring.

VIRUS SPREADING

The outbreak began in Wuhan, a major transportation hub as well as central China's main industrial and commercial centre, and has now spread to other major population centers including Beijing, Shanghai and Hong Kong.

There is no known cure for the virus. Symptoms include fever, difficulty in breathing and cough, similar to many other respiratory illnesses, and can cause pneumonia.

Chinese authorities are still investigating the origins of the virus, though they confirmed the outbreak began at a market in Wuhan with illegal wildlife transactions and that it can spread from one person to another via respiratory transmission. Among confirmed patients are 15 medical workers, further adding to worries about a possible global pandemic.

Many Chinese were canceling trips, buying face masks, avoiding public places such as cinemas and shopping centers, and even turning to an online plague simulation game as a way to cope.

Airports globally stepped up screening passengers from China and the European Centre for Disease Control and Prevention (ECDC) said in a risk assessment that further global spread of the virus was likely.

Britain joined other countries including Australia in advising citizens against all but essential travel to Wuhan.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
Agencies
May 10,2020

Paris, May 10: The number of coronavirus cases worldwide topped four million as some of the hardest-hit countries readied Sunday to lift lockdown restrictions despite concern about a second wave of infections.

Governments around the world are trying to stop the spread of the deadly disease while scrambling for ways to relieve pressure on their economies, which are facing a historic downturn with millions pushed into unemployment.

Despite the intense political pressure to reopen, nations are also keen to avoid second waves of infections that could overwhelm healthcare systems, with reminders over the weekend of the threat posed by the virus.

In the United States, media reported Saturday that the nation's top infectious disease expert, Anthony Fauci, was among three members of the White House coronavirus task force who will self-isolate after potential exposure.

And in South Korea, the capital Seoul shut all bars and clubs on Saturday as more than 50 cases were linked to a man who tested positive after spending time in one of the city's busiest nightlife districts.

Despite the risks, some governments in hard-hit Europe have said are signs of progress that justify cautious steps towards normality.

Officials in France on Saturday said the day's death toll of 80 was the lowest since early April, while nursing home fatalities also fell sharply as the nation prepared to relax curbs on public movement imposed eight weeks ago.

The easing, to begin Monday, has brought mixed reactions.

"I've been scared to death" about the reopening, said Maya Flandin, a bookshop manager from Lyon. "It's a big responsibility to have to protect my staff and my customers."

French health officials have warned that social distancing must be kept up even as restrictions are eased.

In Spain, about half the population will be allowed out on Monday for limited socialisation, and restaurants will be able to offer some outdoor service as the country begins a phased transition set to last through June.

With lingering fears of a resurgence, authorities excluded Madrid and Barcelona -- two COVID-19 hotspots -- from the first phase.

Belgium is also easing some restrictions on Monday, and in some parts of Germany, bars and restaurants reopened on Saturday with further easing set for Monday.

In Britain, Prime Minister Boris Johnson is expected Sunday to lay out a plan for the nation to emerge out of its current lockdown.

Media reports have suggested that Britain may introduce a mandatory 14-day quarantine for international arrivals to stop the spread of the virus.

Global economic figures are pointing to the most acute downturn in nearly a century, with businesses forced to shut and supply lines badly disrupted, and pressure is growing on leaders around the world to find a way out as the worldwide death toll topped 277,000 and infections crossed four million.

In the United States, the country with the highest death toll and where more than 20 million people have lost their jobs, President Donald Trump has insisted that next year would be "phenomenal" for the economy, urging reopening despite the virus still claiming well over 1,000 lives daily in the country.

The scale of the challenge was brought in sharp focus over the weekend as US media reported that top disease expert Anthony Fauci, who has become the trusted face of the government response to the pandemic, is going to self-isolate after possible exposure to an infected White House staffer.

Fauci told CNN that he will undergo a "modified quarantine" as he had not been in close proximity to the staffer, the network reported. He will remain at home teleworking, and will wear a mask for two weeks.

Robert Redfield, the director of the Centers for Disease Control and Prevention, and Stephen Hahn, the commissioner of the Food and Drug Administration, will also self-isolate, CNN added.

All three will still testify at Tuesday's Senate coronavirus hearing, with Redfield and Hahn participating via video link, according to Senator Lamar Alexander, chairman of the chamber's health committee.

It is believed Fauci will attend wearing a mask, CNN reported.

President Trump has faced sharp criticism from his predecessor Barack Obama, who said on a leaked tape that Trump's handling of the crisis was an "absolute chaotic disaster".

With people wearying of being indoors and under economic pressure, anti-lockdown protests have been held in a number of countries in recent weeks, with some demonstrators arguing that such restrictions violate their rights and others promoting conspiracy theories about the pandemic.

Ten people were arrested and a police officer injured in Melbourne, Australia, on Sunday in the latest such protest, where around 150 people gathered to demand an end to the shutdown.

Participants were promoting a number of conspiracy theories, such as linking 5G cellular communications to the disease.

Australian chief medical officer Brendan Murphy said there was "a lot of very silly misinformation out there", including the 5G allegation.

"I have unfortunately received a lot of communication from these conspiracy theorists myself," he said.

"It is complete nonsense. 5G has got nothing at all to do with coronavirus."

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.