AirAsia Flight Goes Missing Between Indonesia and Singapore
This comes on the heels of Malaysia Airlines Flight 370 which is still missing, and Malaysia Airlines Flight 17, which was shot down.
This is the third one. The first two were 370 and 17.
AirAsia Flight Goes Missing Between Indonesia and Singapore
I wonder how viable it would be to just quietly escort flights in that region with stealth aircraft for a while to determine what's actually happening.
Three aircraft, in a short time frame, in a small portion of the globe. Yes, we know one was shot down, but that clustering trips my bullshit detector, even for the other two.
My degree of colorblindness:
I likewise see IR bleedoff before it climbs into the lower end of most people's vision.
Human Blood Substitute Could Help Meet Donor Blood Shortfall
While I don't think non-donors should just be left out in the cold, I do think that donors should get priority over non-donors when it comes to receiving donations. (Exceptions for those who have never been able to donate, such as children, anemics, hemophiliacs, etc...)
Yahoo Stops Honoring 'Do-Not-Track' Settings
After the latest Firefox update, though, typing a search in the address field doesn't go to my preferred (in settings) search engine, but instead to Yahoo.
Firefox stores data about which search engine to use in a set of XML files. If something else gains access to those files, it can edit them to keep the name and icon of, e.g. google, but send the actual search to goatse (or wherever). If you delete the files, then the "restore defaults" button on the "manage search engines" panel will enable, and restore the originals.
Satellite Piece Crashes Through Man's Roof
First space balls, now this?!
A titanium ball of about five kg fell on to the roof of a house in Ordyn district.
No, no, this is still space balls.
How Photoshopped Is That Picture?
I see what you did there...
Well done good sir.
'Free' Games Dominate Top-Grossing Game List On App Store
Erm, did you see the post further up the page regarding the $99 in app purchase in smurf village? This is a kids game aimed at four year olds. No excuse there whatsoever.
The recent snow on the U.S. east coast ...
Nah, only the coasts. In Colorado it takes several feet to do that, and even then we're back up and running in <24 hours (usually <12).
"World's Most Relaxing Music" Composed
Thank you Ted, that was the joke.
Making Sensitive Data Location Aware
Exactly. If someone who HAD access to that data wanted to break security it would be trivial. The point of this technology is that if they forget to delete the data when they're one with it, it will do it for them. It's for the benefit of non-technologically-inclined people.
Ohio Supreme Court Drawn Into Magnetic Homes Case
Ok, so they don't make a permanent magnet strong enough to lift change out of your pocket.
HADOPI To Disconnect 60 People In France
Oh for mod points. Someone mod them up please.
Privacy Groups Ask FTC For Facebook Investigation
Because they keep changing which options are available, what the defaults are, and what the settings mean. Then they also reset to default when they change something. So if you want to have the privacy settings turned up in facebook then you need to check all the settings on a regular basis. You also need to not play any of the facebook games, since a lot of them are just given the same permissions with your account that you are. (unless they've "fixed" this last bit again. It's been how many times now?)
Florida Reduces Penalties For 'Sexting' Teens
Last I checked, Levitical law doesn't say it's ok to kill your daughter for being asked out on a date.
"Wi-Fi Refugees" Shelter in West Virginia Mountains
My 6 year old daughter tests as having an extreme allergy to peanuts. As per doctors orders she hasn't been exposed to peanuts and always has an injector for emergencies (which is a real pain at school since they have a no-drugs policy that won't even let them have emergency medicines).
Zero tolerance policies have officially gone too far.
She loves everything fluffy, but prefers dogs over cats.
Good girl, cats are evil.
Mass. Court Says Constitution Protects Filming On-Duty Police
Really should have logged in before posting. The AC parent is me.
Kentucky Man Builds Bourbon Powered Car
That's powered by burning combustibles too. They just heat water instead of gasses to transfer the power to the pistons.
ESRB To Automate Game Rating
But parents can barely be bothered to check the ratings on games as it is. What makes you think they'll be any more likely to read the questionnaire?
Solar Breakthrough Could Provide Power Without Solar Cells
So to your first post, the claim is not that you cannot collect all the light nor that you are in fact able to focus it to exactly the intensity of the source. In your system the translucent sphere serves to prevent us from focusing the light anywhere near the intensity of the original source, so there is nothing wrong with that. Further, we would now find ourselves unable to focus the light to a spot any more intense than the surface intensity of the translucent sphere. If one were to envelop the whole system with collectors one could in principle collect all the light, just not at one spot.
If the collectors are all mirrors then I don't see why you couldn't. Admittedly, you can't possibly have a perfect reflector, but there's no reason you couldn't focus all the gathered energy on a single point. If there were a laws-of-thermodynamics reason for that to be impossible than you could never power a laser which has a focal point hotter than the surface of the sun with solar panels. But you can. Yes, that makes a conversion from light to electricity and back, but you lose energy doing so. Therefore it must be possible (within the laws of physics, if not current tech) to focus sunlight down to the same intensity with mirrors.
To your 2nd post, "the system" must include the energy radiated away. The energy is not decreasing, but the entropy is. For a thought experiment, assume you are able to focus the light as tightly as you wish, and heat an object to greater than the source's temperature. You could then connect the two objects together and heat would flow from the hotter one to the cooler because that is what maximizes the entropy. Therefore we had violated the 2nd law when we heated the object above the source's temperature.
would heat flow from the hotter to the colder? Yes. However, it will also radiate outwards from the hotter object in every other direction too. The total entropy is still increasing, it's just doing it more slowly. Congradulations, you just discovered insulation. Homebuilders everywhere thank you.
Your setup with the elliptical reflector would not work. Because the sun has finite size, you would find that at the other focus the light isn't directed to a single point, but at a sphere the same size as the sun. In this most extreme possible scenario, you could heat an object there to exactly the sun's temperature, but no higher. Within that sphere the light is not traveling radially inward to the focus, rather most of the light is missing the focus because it was emitted from the sun's surface, not its center.
Ok, the elliptical reflector only matches the surface temperature. I'd still like to see the proof that something that works better is impossible. You have a link to something with the math?
A thought... If I focus a reflector (arbitrarily size) at a point epsilon above the surface of the sun, haven't I just harnessed radiation from the sun to cause a point (not on the surface) to be hotter than it's surface?