Connect with us

Sin categoría

Boeing Starliner Landing: What You Need to Know

Published

on


Boeing’s test of a spacecraft, the CST-100 Starliner, is being cut short because a problem with its internal clock right after launch on Friday put it into the wrong orbit. The capsule, which was built to resume launches of astronauts from the United States, was not able to dock with the International Space Station because of the error.

The capsule, which looks much like the Apollo spacecraft that took NASA astronauts to the moon 50 years ago, is scheduled to parachute to White Sands Missile Range in New Mexico at 7:57 a.m. Eastern time on Sunday. NASA Television will broadcast coverage beginning at 6:45 a.m.

There is also a backup time of 3:48 p.m. Eastern time if the landing cannot be attempted on the first try.

The Starliner consists of two pieces: the capsule where astronauts will be sitting, and a service module that contains thrusters and other systems that are not needed for landing. A thruster firing will cause Starliner to fall back into the atmosphere. The service module is to fall into the Pacific Ocean while the capsule is to cross over Mexico’s Baja peninsula north and then land in New Mexico, its touchdown softened by parachutes and airbags.

For NASA, attempting to put a capsule down on land is unusual. All previous landings of its capsules — the Mercury, Gemini and Apollo programs of the 1960s and 1970s — were in the ocean. After all, you might be safer diving into water than an expanse of sand.

Russian astronauts have always landed on solid ground, and that approach offers advantages. Salt water corrodes metal, which would complicate plans to reuse Starliner capsules for future missions. Also, a capsule hitting an ocean wave at the wrong angle could sink. (That is what happened during testing of Apollo capsules, requiring a revamping of the design.)

The Starliner capsule currently in orbit is scheduled to be used again for a future mission carrying astronauts.

Quite simply: Starliner got the time wrong.

When the spacecraft separated from the Atlas 5 rocket that lifted it to space, an incorrect clock caused it to start firing its thrusters and try to get into the position and orientation where it thought it should be.

“She thought she was later in the mission,” Jim Chilton, senior vice president of the space and launch division at Boeing, said during a news conference on Saturday, “and being autonomous, started to behave that way.”

That caused it to use much more propellant than was expected. Its communications antennas also were not pointed in the correct position, which meant it did not immediately receive corrective commands from Boeing’s flight controllers on Earth. Because of the initial problem, not enough propellant remains to rendezvous and dock with the space station.

“If I knew, it wouldn’t have happened” Mr. Chilton said. “We were surprised.”

The spacecraft’s software set its clock based on the time it received from the Atlas 5 rocket before launch, and it is still too early to tell how it pulled the incorrect information, said Mr. Chilton. He added that the problem was with the Boeing software, not with the rocket, which was built and operated by the United Launch Alliance.

This flight did not have anyone on board, but NASA and Boeing officials insist that if astronauts had been in the capsule, they would have been safe. The astronauts might even have been able to take over manual control and send the spacecraft on the proper path.

Flight controllers were able to send Starliner the correct time. They then performed a couple of thruster firings to raise its orbit to a circular one 155 miles above the surface. That is lower than the International Space Station, which is at an altitude of about 250 miles.

Mr. Chilton said the spacecraft’s propulsion, navigation and life support systems are now operating well.

“We do have a healthy spacecraft,” said Jim Bridenstine, the NASA administrator. “There are many good milestones we have been able to achieve.”

Boeing and NASA will investigate what went wrong and fix it. NASA officials said it was too early to know whether Boeing will be required to fly another crewless mission to dock with the space station or whether it would be able to put astronauts on the next flight as currently planned.

Although the current mission could not perform all of its tasks, if landing is successful tomorrow, the two portions of greatest danger to astronauts — launch and return to Earth — will have been demonstrated.

NASA still hopes to carry astronauts to orbit again in the first half of 2020, and has hired two companies to take astronauts to the space station, Boeing and SpaceX. Both have encountered hurdles and delays.

The problem with Boeing’s Starliner does not directly affect SpaceX’s Crew Dragon capsule. But that company still has to complete tests of its parachute and conduct an in-flight test of its abort system, currently scheduled for Jan. 11, before it is ready to carry astronauts.

Boeing had been aiming for a demonstration flight taking astronauts to the space station in the first half of 2020. But the problems on Friday’s uncrewed test may lead to further delays.

NASA has already talked to Russia about buying additional seats on the Soyuz rockets, which have been the only transportation available to astronauts to and from the International Space Station since 2011.



Source link

Continue Reading
Advertisement
Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *

Sin categoría

Colleges Clamored for Seesaw. That Was once the Just right Information, and the Unhealthy Information.

Published

on


And it’s been a yr. In February, Mr. Sjogreen was once mapping out long-term initiatives from Seesaw’s downtown San Francisco workplace. Come March, he was once running from his Noe Valley area, juggling home-school tasks for his 9- and 12-year-old youngsters, identical to most of the staff, and Seesaw was once in “rapid-response mode,” as he put it.

Lecturers like Sharmeen Moosa, a first-grade trainer at a global college in Bahrain, determined Seesaw could be their remote-learning platform.

“Previous to Covid, I used it as only a virtual portfolio for children,” an internet choice of their drawings and recordings, Ms. Moosa mentioned, but if her college closed in February, her use “remodeled vastly.” She used the app for morning messages and day by day courses, including audio or video clips, posting further assets, and developing scholar assignments along side speaking with households.

Many different academics used the app in an identical techniques, exposing shortfalls that the corporate needed to race to mend.

The app, designed to paintings with iPads and Chromebooks, had hardly ever been used with Android pills. However now oldsters have been going online with Amazon Fireplace or Samsung units operating Android. A large number of scholars didn’t have e-mail addresses and wanted a unique option to log in from domestic. Lecturers, who may just not glance over scholars’ shoulders whilst they labored on an project, sought after to touch upon stored drafts sooner than scholars submitted a last model. Notification delays grew from a few seconds to hours. The corporate’s servers every so often slowed to a move slowly.

The ones problems supposed academics, households and colleges all fired questions at Seesaw for lend a hand. Mr. Sjogreen, who prided himself on getting again to shoppers nearly in an instant, discovered that simply wasn’t conceivable.

“I’m unhappy that throughout a time the place they have been so wired, we weren’t as responsive as we wish to be,” he mentioned.



Supply hyperlink

Continue Reading

Sin categoría

With Holiday Leases Empty, Ecu Towns See a Likelihood to Reclaim Housing

Published

on


LISBON — Lengthy prior to the coronavirus swept throughout Europe this spring, many towns have been complaining {that a} proliferation of temporary condo leases geared toward vacationers thru platforms like Airbnb used to be using up housing prices for locals and destroying the nature of ancient districts.

Now that the pandemic has all however bring to a halt the stable drift of tourists, many Ecu towns are seizing a possibility to push temporary leases again onto the long-term housing marketplace.

In Lisbon, the Portuguese capital, town govt is turning into a landlord itself through renting empty residences and subletting them as sponsored housing. In Barcelona, Spain, the housing division is threatening to take ownership of empty homes and do the similar.

Different town governments are enacting or making plans new regulations to curb the explosive expansion of leases aimed in large part at vacationers. Amsterdam has banned holiday leases within the middle of the previous town; a Berlin reliable warned of a crackdown on temporary leasing platforms “seeking to evade law and the enforcement of legislation”; and Paris is making plans a referendum on Airbnb-type listings.

For years, homes rented out for temporary remains have put power at the housing markets in different Ecu towns. Lisbon has greater than 22,000 Airbnb listings, in line with Within Airbnb, which tracks listings in towns all over the world. Barcelona has 18,000, and Paris — some of the platform’s biggest markets — has just about 60,000.

When vacationers are abundant, renting a belongings on a temporary foundation can also be extra profitable for house owners than a long-term tenant, one thing that town governments say has distorted housing markets in towns the place provide is already tight. In addition they accuse on-line platforms of circumventing regulations installed position to give protection to native markets.

“We can’t tolerate that lodging which may be rented to Parisians at the moment are rented all 12 months to vacationers,” the deputy mayor of Paris, Ian Brossat, mentioned in a telephone interview. Mr. Brossat additionally mentioned he used to be hoping to chop the choice of days in line with 12 months {that a} belongings can also be rented thru platforms like Airbnb — recently 120. He accused the corporate of breaching even that rule.

“Airbnb pretends to recognize the legislation, nevertheless it’s now not the case,” mentioned Mr. Brossat, who has written a guide important of Airbnb and its have an effect on on towns.

Airbnb denies any wrongdoing, in Paris or in different places. “They’ve set the principles, and we’re following the principles,” mentioned Patrick Robinson, Airbnb’s director of public coverage for Europe, the Center East and Africa. “The place there’s a lively dialogue about the correct laws, we’re a part of that dialog, and in the long run that’s for native politicians to come to a decision.”

He mentioned that Airbnb equipped registration main points and different information to the government in main tourism hubs like Lisbon, Paris and Barcelona to assist town officers put into effect their regulations. “We if truth be told assume that higher get admission to to information is the answer right here.” In September, the corporate offered Town Portal, which it says will permit governments get admission to to information that may assist establish listings that don’t agree to native laws, akin to unregistered listings.

Probably the most formidable initiative is arguably the only in Lisbon, which has began signing five-year rentals for empty temporary condominium residences. Those homes are then sublet at decrease costs to other folks eligible for sponsored housing. The town govt has put aside Four million euros, or about $4.7 million, for the primary 12 months of subsidies.

“We entered the pandemic with an enormous power on our housing marketplace, and we can’t manage to pay for to go out the pandemic with the similar set of issues,” mentioned town’s mayor, Fernando Medina. “This program isn’t a magic wand, however it may be a part of the answer when it comes to elevating the provision of reasonably priced housing.”

This system is aiming to draw 1,000 condo house owners this 12 months, and has drawn 200 thus far. Mr. Medina mentioned he used to be assured that the plan would meets its function, since a rebound in tourism anytime quickly turns out increasingly more not going because the pandemic drags on.

The plan has been welcomed through some group associations that had criticized native politicians for permitting town to transform a playground for vacationers and rich traders, a lot of them interested in Portugal through residency lets in and tax breaks presented to foreigners after the 2007-Eight monetary disaster.

“The coronavirus has helped divulge the unfavourable sides of Portugal’s restoration from the monetary disaster, which used to be pushed through actual property and tourism quite than a focal point at the fundamental wishes of native other folks,” mentioned Luís Mendes, an city geographer who’s a member of a electorate’ platform known as Residing in Lisbon.

Above all, Mr. Mendes mentioned, the lockdown restrictions used to comprise the coronavirus put the highlight at the housing imbalances in Lisbon. “How are you able to quarantine for those who don’t have a good space?” he mentioned. “We’ve a town corridor that has put ahead a fascinating scheme and is no less than conscious that having a roof is a elementary human proper.”

Then again, some house owners don’t believe town govt a competent tenant. Portugal, they are saying, has a historical past of prison uncertainty and unexpected rule adjustments every time a brand new management takes workplace.

“When you take a look at the monitor document of the politicians in Lisbon, it’s a fully hopeless one, of incompetence and frequently corruption,” mentioned Rita Alves Machado, who owns 3 empty temporary residences round Lisbon. “The town owes cash far and wide, and I simply don’t consider they’re going to pay on time or stick with their very own regulations.”

The law of temporary leases has been a drawnout affair in Europe.

In September, the Court docket of Justice of the Ecu Union subsidized towns making an attempt to crack down on temporary leases, after supporting a French court docket ruling in opposition to two belongings house owners illegally renting out 2d properties on Airbnb. The court docket had issued a ruling in Airbnb’s prefer remaining 12 months, announcing that it used to be an on-line platform quite than an actual property corporate, which might have required it to agree to housing regulations. The Ecu Fee is taking additional steps to keep watch over the platform and others thru a brand new Virtual Services and products Act, which objectives to modernize the prison framework for such services and products around the Ecu Union.

The longer the pandemic hinders shuttle, the much more likely tasks like Lisbon’s are to realize traction, town officers and native belongings professionals say. Within the period in-between, Airbnb has discovered itself on moving flooring.

In Lisbon, occupancy charges for Airbnb and Vrbo, a short-rental reserving web site that used to be as soon as referred to as HomeAway, dropped 50 p.c in Would possibly from a 12 months previous, in line with AirDNA, which collects holiday condominium information.

Miguel Tilli, the co-founder of HomeLovers, a Portuguese actual property company, mentioned he have been record as many as 60 new homes a month in Lisbon — virtually all of which had prior to now been rented thru Airbnb however have been now open to long-term tenants.

Apartment costs within the town have dropped 10 p.c because the get started of the pandemic, however landlords who had prior to now let homes thru Airbnb have been nonetheless immune to decreasing rents.

“Many landlords are performing as though Covid is any person’s else downside,” Mr. Tilli mentioned. “That can’t remaining without end.”

Raphael Minder reported from Lisbon, and Geneva Abdul from Paris.



Supply hyperlink

Continue Reading

Sin categoría

Apple, Google and a Deal That Controls the Web

Published

on


A former Google government, who requested to not be known as a result of he was once no longer authorized to speak about the deal, stated the possibility of shedding Apple’s site visitors was once “terrifying” to the corporate.

The Justice Division, which is calling for a court docket injunction combating Google from getting into into offers like the only it made with Apple, argues that the association has unfairly helped make Google, which handles 92 p.c of the arena’s web searches, the middle of customers’ on-line lives.

On-line companies like Yelp and Expedia, in addition to firms starting from noodle stores to information organizations, frequently whinge that Google’s seek domination permits it to fee promoting charges when other people merely glance up their names, in addition to to persuade customers towards its personal merchandise, like Google Maps. Microsoft, which had its personal antitrust combat 20 years in the past, has instructed British regulators that if it had been the default possibility on iPhones and iPads, it will make extra promoting cash for each seek on its rival seek engine, Bing.

What’s extra, competition like DuckDuckGo, a small seek engine that sells itself as a privacy-focused choice to Google, may by no means fit Google’s tab with Apple.

Apple now receives an estimated $eight billion to $12 billion in annual bills — up from $1 billion a yr in 2014 — in trade for construction Google’s seek engine into its merchandise. It’s most definitely the one largest fee that Google makes to any person and accounts for 14 to 21 p.c of Apple’s annual earnings. That’s no longer cash Apple can be keen to stroll clear of.

If truth be told, Mr. Cook dinner and Mr. Pichai met once more in 2018 to speak about how they might building up earnings from seek. After the assembly, a senior Apple worker wrote to a Google counterpart that “our imaginative and prescient is that we paintings as though we’re one corporate,” in step with the Justice Division’s grievance.

A compelled breakup may imply the lack of simple cash to Apple. However it will be a extra important danger to Google, which might haven’t any obtrusive technique to change the misplaced site visitors. It would additionally push Apple to obtain or construct its personal seek engine. Inside Google, other people consider that Apple is among the few firms on the planet that might be offering an impressive choice, in step with one former government. Google has additionally frightened that with out the settlement, Apple may make it harder for iPhone customers to get to the Google seek engine.



Supply hyperlink

Continue Reading

Trending

Copyright © 2020 Zox News Theme. Theme by MVP Themes, powered by WordPress.