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Tuesday, January 8, 2013
Canon Powershot N Hands On: What a Cute Little Thing
Monday, January 7, 2013
At least one in six stars has an Earth-sized planet, analysis finds
Jan. 7, 2013 ? The quest for a twin Earth is heating up. Using NASA's Kepler spacecraft, astronomers are beginning to find Earth-sized planets orbiting distant stars. A new analysis of Kepler data shows that about 17 percent of stars have an Earth-sized planet in an orbit closer than Mercury. Since the Milky Way has about 100 billion stars, there are at least 17 billion Earth-sized worlds out there.
Francois Fressin, of the Harvard-Smithsonian Center for Astrophysics (CfA), presented the analysis today in a press conference at a meeting of the American Astronomical Society in Long Beach, Calif. A paper detailing the research has been accepted for publication in The Astrophysical Journal.
Kepler detects planetary candidates using the transit method, watching for a planet to cross its star and create a mini-eclipse that dims the star slightly. The first 16 months of the survey identified about 2,400 candidates. Astronomers then asked, how many of those signals are real, and how many planets did Kepler miss?
By simulating the Kepler survey, Fressin and his colleagues were able to correct both the impurity and the incompleteness of this list of candidates to recover the true occurrence of planets orbiting other stars, down to the size of Earth.
"There is a list of astrophysical configurations that can mimic planet signals, but altogether, they can only account for one-tenth of the huge number of Kepler candidates. All the other signals are bona-fide planets," says Fressin.
Most sun-like stars have planets
Altogether, the researchers found that 50 percent of stars have a planet of Earth-size or larger in a close orbit. By adding larger planets, which have been detected in wider orbits up to the orbital distance of the Earth, this number reaches 70 percent.
Extrapolating from Kepler's currently ongoing observations and results from other detection techniques, it looks like practically all Sun-like stars have planets.
The team then grouped planets into five different sizes. They found that 17 percent of stars have a planet 0.8 -- 1.25 times the size of Earth in an orbit of 85 days or less. About one-fourth of stars have a super-Earth (1.25 -- 2 times the size of Earth) in an orbit of 150 days or less. (Larger planets can be detected at greater distances more easily.) The same fraction of stars has a mini-Neptune (2 -- 4 times Earth) in orbits up to 250 days long.
Larger planets are much less common. Only about 3 percent of stars have a large Neptune (4 -- 6 times Earth), and only 5 percent of stars have a gas giant (6 -- 22 times Earth) in an orbit of 400 days or less.
Smaller planets aren't picky
The researchers also asked whether certain sizes of planets are more or less common around certain types of stars. They found that for every planet size except gas giants, the type of star doesn't matter. Neptunes are found just as frequently around red dwarfs as they are around sun-like stars. The same is true for smaller worlds. This contradicts previous findings.
"Earths and super-Earths aren't picky. We're finding them in all kinds of neighborhoods," says co-author Guillermo Torres of the CfA.
Planets closer to their stars are easier to find because they transit more frequently. As more data are gathered, planets in larger orbits will come to light. In particular, Kepler's extended mission should allow it to spot Earth-sized planets at greater distances, including Earth-like orbits in the habitable zone.
Headquartered in Cambridge, Mass., the Harvard-Smithsonian Center for Astrophysics (CfA) is a joint collaboration between the Smithsonian Astrophysical Observatory and the Harvard College Observatory. CfA scientists, organized into six research divisions, study the origin, evolution and ultimate fate of the universe.
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The above story is reprinted from materials provided by Harvard-Smithsonian Center for Astrophysics.
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Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_science/~3/gHHj9jDNvGU/130107162220.htm
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Sleep problems to hit Mars crews
7 January 2013
Last updated at 16:23 ET
Some of the first results from a simulation of a mission to Mars show that some of the crew experienced isolation and mild depression.
Research published in the Proceedings of the National Academy of Sciences suggests differences in the sleep patterns of the crew caused problems.
The findings suggest that not all current astronauts will be suited to interplanetary travel.
The Mars500 project investigated how crews would cope on a real mission.
Prof Mathias Basner, of the University of Pennsylvania - who was involved in the sleep study - says that the findings show that astronauts for any future Mars missions should be tested for their ability to cope without a natural day/night cycle.
"This illustrates that there are huge differences between individuals and what we need to do is select the right crew, people with the right stuff, and train them properly and once they are on the real mission to Mars," he told BBC News.
Continue reading the main story?Start Quote
End Quote Prof Mathias Basner University of Pennsylvania"This illustrates that there are huge differences between individuals and what we need to do is select the right crew, people with the right stuff?
Currently, no astronaut is in space for longer than six months on the International Space Station (ISS). The aim of the 17 month-long Mars500 project was to study the physical and psychological effects that the much longer journey to Mars might have on future astronauts.
The simulation involved six crew members: three Russians, two Europeans and one Chinese volunteer.
For much of the time, the men had only limited contact with the outside world. Their spaceship had no windows, and the protocols demanded their communications endured a similar time lag to that encountered by real messages as they travel the vast distance between Earth and Mars.
Nearly 100 different experiments were carried out to assess the impact of the journey on the men, and it is only now that the first results are emerging.
The sleep experiment is among the first to show what each crew member went through during their simulated mission.
The researchers found that one crew member lost his natural day/night rhythm completely. Instead of a 24-hour cycle, he slipped into a 25-hour day so after 12 days he was completely out of sync with his fellow crew mates. It was the middle of the night for him while his colleagues were working on the mission.
"You can imagine that that would be good during a real Mars mission when there are mission critical tasks planned during the day," said Prof Basner.
"He became somewhat isolated. For 20% of the time this crew member was either the only crew member awake or the only person sleeping which could potentially be a problem for team cohesion," he said.
Most of the crew members began to sleep more and become less active as the mission wore on, but one crew member did the opposite. He slept less and less during the mission until he became chronically sleep deprived.
All the crew had to carry out performance tests once a week. The sleep deprived member was responsible for the majority of the errors in the tests.
Another crew member developed a mild depression.
"Two crew members coped really well with this prolonged confinement and isolation," according to Prof Basner.
Continue reading the main story?Start Quote
End Quote Dr Kevin Fong Space medicine expertSleep deprivation is likely to be a real problem on future Mars missions. ?
"But four of them had a problem where you would think you don't want to send someone like this on the mission or if you do, you want to know that this subject is vulnerable and train him or her properly."
Problems manifested themselves at between two and four months and so, the research team suggests, potential interplanetary astronauts could be screened for their suitability by being put through a much shorter simulation than the Mars500 project.
Another problem identified by the researchers was the dim fluorescent lighting which was not bright enough to simulate daylight and no protocol for differentiating between day and night in the simulated spacecraft. It was up to the crew members when to turn the light on and off.
"This is one of the take home messages," according to Prof Basner. "There has to be adequate lighting and it has to be strong enough to get the day/night cycle going and the time that the crew exposes itself to the light also has to be optimal."
Dr Kevin Fong, who is an expert on space medicine said that the research confirms that sleep deprivation is likely to be a real problem on future Mars missions.
"It needs to be taken seriously," he said. "Sleep deprivation is going to happen with crews and has the potential to affect mission safety."
Dr Iya Whiteley who is the deputy director at the Centre for Space Medicine, Mullard Space Science Laboratory, said that there were also lessons to be learned for shift workers on Earth.
"Any individual undertaking accurate detailed work without normal day/night cycle will be affected, whether it is the air traffic controller on shift work, or nuclear power workers."
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Source: http://www.bbc.co.uk/news/science-environment-20937729#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa
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WORLDS ?ND
the world has fallen to a plague. the dead come back to life and try to infect the living. there is only one way to survive. fight and search for a safe haven.
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Sunday, January 6, 2013
The Right Web Host Will Help Your Business Grow - Internet ...
TIPS! Try calling the customer service center of any hosting provider you are considering using. Evaluate whether their response was courteous, helpful and professional.
Once you buy your domain name, you need to find a web host. With so many options, it may seem impossible to figure out where to begin. What are the best things to look for when selecting a company to be your website host? How do you determine if a web host is reliable? This article will give you the necessary information you need to understand web page hosting and find a host that will serve your needs.
TIPS! Pay attention to the reputation of the companies you consider. Look over reviews and other articles on different hosts.
Don?t be led astray by the dizzying number of options to choose from. Companies pop up constantly offering lower prices or bigger plans. Do not let yourself be easily swayed, and maintain your ability to make a calculated decision. Instead, focus on identifying a handful of the best options, then choosing from within that group.
TIPS! If you need more than one email address, ask for it from your web host. Ask your web host if they have email available that uses POP 3 format.
Some web hosts use Windows, while others choose Linux. Each platform comes with it?s own features and requirements. In general, a host using a Linux server will be less expensive than one that uses Windows.
TIPS! Seek independent reviews of a hosting service that looks good to you before making a decision. Customers like to post comments about online services that are either really good or really bad.
You should carefully look over the downtime of a web host. A web page hosting company will post their maintenance down times. Look at these postings and analyze them. If they fall during times you will need to use the service, or if there is too much down time, take note of this. If maintenance causes downtime during peak traffic hours or on multiple days of every month, this may not be your best bet.
TIPS! Free web hosting services are usually not as good as they look. For a modest website, free may be okay, but if you have a business or attract a lot of traffic, you may want to go with a more professional host.
If you are certain you will be using the same host for several years, try finding one that may give you a discount for years of continuous business. You could save a good deal of money this way.
TIPS! You should look for a web host that will back up your web content. Some hosting services may offer to backup your information for you, but you still want to make sure to back it up yourself as you can lose all your SEO work if you don?t.
Be certain you use a well-established payment process when you pay for your hosting services. When you use Paypal or major credit card companies, you are afforded better protection. Additionally, Paypal stops any host company from charging you automatically until you first give your consent.
TIPS! If you think you want to choose a free web host, reconsider. Sure, you can?t beat free, but that price means you suffer some pretty serious limitations.
Most hosts already require you to back up your own site. You should definitely back up your data, for the safety of your marketing materials and unique media if nothing else. This way, if anything ever happens, you have your site still in your hands.
TIPS! Ask web hosting providers about the level of security they have in place. In today?s society, websites come under attack quite often, and there are always a great number of potential threats.
If you want to get more visitors, sign up for a host that incorporates SEO functions. A SEO feature will allow your site to be registered with multiple search engines. However, you may prefer to list your website with a search engine directly, as you will have more control over the description which appears under your website?s title on search engine results pages.
TIPS! Make a list of the things you are looking for before you begin shopping around for your web host. Figure out what it is you need and want and from there shop around to see what web hosts matches these expectations.
Examine all the fine print in your hosting contract before agreeing to it. At times, fees are added that aren?t obvious during the sales pitch. You need to know this. Look out for set up fees, penalties for terminating the contract early and other hidden charges. It can all add up quickly.
TIPS! Look into the host?s track record before signing a contract. Some web hosting companies make claims that are completely unsupportable or untrue in their quest to win your business.
Follow the message boards dedicated to your hosting company to stay abreast of the latest news. If multiple web hosts are down, you will know it?s not your particular host?s problem, and that the issue is being worked on. If the host is down over 24 hours, stay active on that forum to see why and to draw attention to the issue.
TIPS! Take a look at some of the popular hosting directories. You?ll find all the hosts available which meet your particular needs when it comes to pricing, features and size.
You should choose a service that has been around for a long time. A long-standing company will, generally, provide better support. These companies are more likely to have experience with various issues you may encounter, so they can solve problems for you sooner. A good website hosting service should follow standard procedures when a problem appears. This prevents you from having to go through customer support hassles with the staff of new companies, who tend to have less experience.
TIPS! Make sure that the web host company that you are going to use is reliable. You could read on customer reviews and find out if they have any kind of guarantee in terms of returning your money if you are not satisfied.
This article has hopefully shown you that there?s more to setting up your website than choosing the domain name. You have to find a service to host it. The more you know about the features and benefits of different hosting options, the easier it will be to operate your website efficiently. Use the advice from this article to quickly get your site running.
Make sure to check us out often learn more about web hosting Lake Worth, South Florida area.
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Pied-a-Terre in Paradise ? Alisa in Wonderland | valaumilijay
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'Texas Chainsaw 3D' Review: One Interesting Idea, Dozens of Stupid Ones
LOS ANGELES (TheWrap.com) - "Texas Chainsaw 3D" brings one interesting new facet to the nearly 40-year-old franchise - and it's not the half-hearted 3D, which adds up to little more than the occasional shot of the titular implement bursting out of the screen. What the movie does do, which horror buffs may or may not go for, is turn the terrifying, bloodthirsty Leatherface into a maligned and misunderstood monster.
He doesn't throw daisies into a lake with a little girl, mind you, but we're still meant to feel his pain and to side with him against the local redneck vigilantes who have hounded him and his kinfolk. Beyond that curveball, however, "Texas Chainsaw 3D" is a dreary slog through the dreadfully familiar. You've seen it all in a million movies: attractive victims doing stupid things, foreboding secret passages, bifurcated corpses.
Previous attempts at reviving the franchise, particularly 1986's "The Texas Chainsaw Massacre Part 2" and 1994's "Texas Chainsaw Massacre: The Next Generation" (featuring up-and-comers Renee Zellweger and Matthew McConaughey), at least tried to inject some of the gallows humor and pungent satire of the original. This new one, directed by John Luessenhop ("Takers," "Lockdown") isn't just humorless; it's witless.
Under the opening credits, we see highlights from "The Texas Chain Saw Massacre" (1974), and the movie begins moments later, with local deputy Hooper (Thom Barry, playing a character thuddingly named after the original film's director) going to the Sawyer house to arrest Leatherface, who suddenly has lots more family members that we've ever seen before. A rowdy bunch of local goons, led by Burt Hartman (Paul Rae), take the law into their own hands, setting the house on fire and seemingly killing everyone inside.
That night, when the yokels come to gloat over their victory, one of them finds a dying Sawyer and her baby; he kills the lady and steals the child. Two decades or so later - yes, it's been almost 40 years since the first movie came out, but the movie's chronology is just one of its problems - that infant has grown up to be Heather (Alexandra Daddario), who works as a butcher and makes art out of bones. (Take that, nurture!) She learns she was adopted when she receives word that her grandmother Verna Sawyer has died and left her a Texas mansion.
Heather arrives in town - where Hooper is now sheriff and Hartman the mayor - with her boyfriend (rapper Trey Songz) and a cadre of friends and hitchhikers, and the group is so busy exploring the house that Heather doesn't bother to read the letter from her grandmother that explains that Leatherface (Dan Yeager) is alive and well in the basement and is now Heather's responsibility. Cue carnage.
The movie's none-too-subtle message is that family comes first, even when that family involves chainsaw-killers who sew human faces onto their own, and that we should cheer for Leatherface to prevail over the idiot townspeople who slaughtered his relatives.
In a smarter movie, such a realignment of sympathies would seem bold and transgressive, but after watching idiots get picked off one by one for doing all the dumb things that characters in moronic horror movies do, the point is somewhat lost.
The film ends with the implication that more sequels are to come, and that's probably the biggest scare that "Texas Chainsaw 3D" can muster.
Source: http://news.yahoo.com/texas-chainsaw-3d-review-one-interesting-idea-dozens-000649419.html
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