Can you see it? It's inside the gold ring between the United States Cyber Command and the American bald eagle. A secret hexadecimal code. The key to all America's secrets. Or their favorite Lynyrd Skynyrd's song. [Updated]. More »
United States - Cryptography - United States Cyber Command - Math - Communication Theory
What is the use of converter transformer?
It is said its reduce harmonics. Explain how it is reducing hamonics in a industry.
Can anyone tell me whether transformer stated below can be parallel at the secondary side
1) Step down transformer, vector group Dyn1, 18kv/11kV
2) Step up transformer, vector group YNd11, 4kv/11kv
Thanks you...
Best Buy employee Brian Maupin got internet famous last week with this iPhone 4 versus HTC Evo video. Which made Best Buy upset enough to suspend and threaten to fire the guy. Today, Maupin was granted a stay of termination. More »
IPhone - Best Buy - Smartphone - Handhelds - YouTube
Hi all.
I'm working in petrochemical industry which deals with many rotary compressors and steam turbine. In condition monitoring of these, people says orbit analysis is the best one.
Please give any links study about this.
Thanks in advance
What are the materials that can be used as to resist magnetic attraction or repulsion between two magnets?
Please note that I am asking for resistance and not shielding the magnetic attraction or repulsion between two magnets.
Please share your experience.
As I write this, a plane powered by the sun is flying somewhere over Europe, undertaking its most ambitious test flight yet.
When we last left the Solar Impulse back in April, the experimental aircraft had flown a two-hour test to prove it was flight-worthy. Today, the pilot in the plane, which weighs about as much as a car and is covered in 12,000 solar cells, will try to stay aloft for 24 hours, even cruising along during the nighttime hours.
“The goal of the project is to have a solar-powered plane flying day and night without fuel,” said team co-founder Bertrand Piccard, adding that this test flight – the third major step after its first ‘flea hop’ and an extended flight earlier this year – will demonstrate whether the ultimate plan is feasible: to fly the plane around the world. “This flight is crucial for the credibility of the project” [AP].
Piccard’s team wanted to fly a little closer to the summer solstice last month, but technical problems left them grounded. With the bug in the communications system now sorted out, pilot Andre Borschberg took off from Switzerland at about 7 a.m. local time. When night falls in Europe—sometime later this afternoon U.S. time—Borschberg will have to decide whether he’s managed to save enough energy to fly through the night. If so, he’ll bring the plane down from an altitude of nearly 28,000 feet to just about 5,000 and hold steady, waiting for the dawn so he can land.
“For seven years now, the whole team has been passionately working to achieve this first decisive step of the project,” said pilot Andre Borschberg as he entered the cockpit at an airfield in Payerne, in the west of Switzerland…
“The big question is whether the pilot can make efficient use of the battery energy to fly throughout the night,” the team said in a statement [BBC News].
We’ll keep you posted on how they do.
Related Content:
80beats: Flying the Sunny Skies: Solar-Powered Plane Completes Two-Hour Test Flight
80beats: Solar-Powered Spy Plane Stays Aloft for Over Three Days
80beats: Meet the “Puffin,” NASA’s One-Man Electric Plane
DISCOVER: Who’s Flying This Thing?
Image: Solar Impulse
EAA AirVenture Oshkosh is the yearly membership convention of the Experimental Aircraft Association (EAA), an international organization of aviation enthusiasts based in Oshkosh, Wisconsin. Billed as "The World's Greatest Aviation Celebration,", EAA AirVenture Oshkosh will run from July 26 to Aug
It sounds cool to say maybe the Internet has turned us all into one giant superorganism, as Robert Wright does today in the Opinionator blog at the New York Times. But before we bandy about cool-sounding words, it’s necessary to think hard about what they mean–particularly, what they mean to the biologists who first developed them as concepts.
The word superorganism can describe an ant colony or any other society of animals in which the individuals function like cells in a body. They come in extremely specialized types (workers and queens and other castes for ants; liver cells, neurons, and other cell types for our bodies). They coordinate their specialized functions with communication (alarm pheromones in ants; hormones, cytokines, and other signals in us). What’s more, superorganisms have been shaped by the same force that shapes organisms like us: natural selection. Organisms have evolved into sophisticated decision-generators. In response to changes in the environment, our bodies generate decisions about how to react–whether that decision is to run for our lives or just break into a sweat to help keep ourselves from overheating. Some kinds of decision-making systems favor survival and reproduction. Other kinds fail. It’s legitimate to call an ant colony a superorganism, because the ants also make collective decisions (move a colony, defend it, etc.), and those decisions determine their survival and their ability to make new colonies.
The word superorganism is a metaphor–a way of thinking of something (an insect colony) as something else (an individual animal). But it’s a great metaphor, because the more you think about it, the more parallels you encounter. It guides thought, and yields insight. (A good place to see the metaphor work its magic is in Bert Holdobler’s book, The Superorganism: The Beauty, Elegance, and Strangeness of Insect Societies.) Metaphors fail when they capture a few, superficial similarities but lack the deep connections that really matter. Yes, we can communicate with each other a lot with Facebook, but what collective decision has emerged from that communication, beyond getting Betty White on Saturday Night Live? How have those decisions allowed some superorganisms to survive while others die off? Oops–there’s only one so-called superorganism in Wright’s piece–ourselves. So the metaphor fails yet again. Wright doesn’t do the hard work of proving this metaphor really works. And so when he then starts hinting that somehow becoming a superorganism is the whole point of human evolution–our destiny–it’s a prize he has not earned.
Superorganisms are cool enough when they’re just made up of ants. We don’t need Facebook to make them interesting.
(HealthDay News) -- Scientists have grouped together a series of genetic variants that can predict with 77 percent accuracy whether or not a person will live to 100 years of age.
Although experts and others probably could have predicted life span with even greater accuracy had they asked people how long their parents had lived, said Dr. Robert Marion, chief of genetics and development medicine and director of the Center for Congenital Disorders at Children's Hospital at Montefiore Medical Center in New York City, that method would not pave the way for advances in science, as this study likely does.
"Right now, this is kind of like a party trick but eventually, if you can identify early in life those individuals who have a predisposition to living longer and those who are destined to die young, you might actually be able to come up with some interventions for those who are going to die young and allow them to live longer," Marion said. "One of the big benefits of the new genomic medicine is that we're going to be able to do personalized medicine, and this is one way to approach that."
The study, funded by the National Institute on Aging and the National Heart, Lung, and Blood Institute, appears in the July 2 issue of Science. Read more...
I have recently received this alert:
- CVE-2010-0483 -
(under review) Learn more at National Vulnerability Database (NVD) • Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings
Description
vbscript.dll in VBScri
Hubble is the gift that keeps on giving. Check this jaw-dropping stunner:
Holy wow! Click to embiggen, or go here to get a ginormous image.
This is an image of NGC 3603, a vast cloud of gas and dust that is cranking out stars like no one’s business. It’s one of the busiest stellar nurseries in our entire galaxy. That cluster of stars in the center has thousands of newly-born stars in it, including one named NGC 3603A. This bruiser is the most massive star ever to have its mass directly measured: it is a whopping 116 times heftier than the Sun. That’s about as massive as a star can get without tearing itself apart!
But look to the upper right; see that bright star centered in some blue-ish gas? I’ve zoomed in on it here. That star is Sher 25, a massive B1a supergiant that is a ticking time bomb. Sometime in the next 20,000 years — and that’s a guarantee — it’ll blow, creating a supernova that will rival Venus for brightness! I know this because the gas around it is a classic hourglass-shaped bipolar nebula, created as the star itself expels dense winds of its own material. We’ve seen this before: around the supernova SN 1987a.
Here’s a shot from Hubble of 87a (click to embiggen this, too). You can see the ring around the star, and the faint rings around it top and bottom. It’s still not clear exactly how they formed, but it’s clear they’re from when the star was younger. The rings around 87a can be dated to be about 20,000 years old — that means the star made the rings and blew up 20,000 years later. Sher 25 already has rings, and it’s a bit hotter and more massive than the star that blew up in 1987… so it has no more than 20,000 years, and probably less, before it detonates as a tremendous supernova. I’ll note it’s 20,000 light years away, so it’s no danger to Earth.
NGC 3603 is one of my favorite objects in the whole sky. I studied SN87a for my PhD, and a few years back I was a referee on a paper about Sher 25 — the only paper I ever professionally refereed. All for the best, I’m thinking.
Still, the nebulosity, the stars, Sher 25 — altogether, this is an amazing object, and a magnificent picture. We may even have an early entry for my annual Top Ten Astronomy Pictures of 2010.
Oh — this image was taken by my old grad advisor, Bob O’Connell. So now I think this object and I have come — pardon the expression — full circle.
Image credit: NASA, ESA, R. O’Connell (University of Virginia), F. Paresce (National Institute for Astrophysics, Bologna, Italy), E. Young (Universities Space Research Association/Ames Research Center), the WFC3 Science Oversight Committee, and the Hubble Heritage Team (STScI/AURA)
Related posts:
- Does this cluster make my mass look fat?
- Another Hubble stunner… and it’s a repeat. Kinda.
- Astronomers find the most massive star ever discovered
- 20 years ago today
- What is the next star that will explode? (a YouTube video I made)
I spent some fifteen minutes on the moon yesterday. It wasn’t pretty. A meteor strike knocked out my base’s life support; I crashed a robot into a NASA supply shed; and, while I fiddled around with a welding torch, a gas line exploded.
Moonbase Alpha, the first of two commercial-quality online games that NASA has just developed, taught me a lot: how a solar panel-powered life-support system might work, what “regolith processing” really means, and the weird gait I’d have if I tried to sprint on the lunar surface. Perhaps it also taught me that I’m not cut out to be an astronaut, but maybe I’ll try multiplayer mode before making that decision.
The game, released yesterday on Valve’s Steam video game network, imagines the year 2020 when we have the meager start of a lunar base near Shackleton crater, not far from the Moon’s south pole. A meteor strike disables the base’s life-support (it’s not just me) and one or more players must get it running again in about 25 minutes.
This requires an understanding the base’s systems as well as building and maneuvering (or racing…) your own robots into areas too dangerous for humans. The game is a project launched by NASA’s Learning Technologies program and is a proof-of-concept meant to see if a video game can inspire youth interest in science, technology, engineering, and mathematics.
I’m not sure how more expert gamers will feel, but my geeky heart leap when I saw the animated NASA logo in the game’s opening credits–not to mention the lunar footprints left behind on my trail of destruction.
Related content:
Discoblog: Buzz Aldrin Explains: How to Take a Whiz on the Moon
Discoblog: NASA iPhone App Lets You Drive a Lunar Rover (Just Try Not to Get Stuck)
Discoblog: California Lays Claim to Astronaut Garbage Left Behind on the Moon
Discoblog: Trippy Lunar Opera: Haydn at the Hayden Planetarium
I learned about vibraing wire type pressure sensor. How it works?
I am designing new coil for induction heater it consist just from 1 turn and it is used to heat a cast iron part to certain temperature. I would like to have the equations that I need to know the optimum design of the coil and the optimum distance from the coil to the cast iron part.
I've looked a bit more closely at the Smithsonian/Pew Poll that I blogged recently, and I realized I overlooked one of the most important (and dismal) findings. Once again, this poll shows that global warming denial is on the rise:
In an exception to the pessimism about the environment, the poll found a ten-point drop in the percentage of respondents who say the earth will get warmer: from 76 percent in 1999 to 66 percent in 2010. And moreover--and consistent with my remarks in the Washington Post piece--this is happening among Republicans:
That trend “is very consistent with data we've gathered on the issue of global warming more generally,” Keeter said. “There are many possible explanations, but one thing is quite clear: there is a strong partisan and ideological pattern to the decline in belief in global warming.” The vast majority of the change since 1999, he said, has occurred among Republicans and independents who lean Republican. Yup--the issue has gotten more partisan, more polarized, and so people have made up their minds based on ideology first, and data second. Sadly, that's how we think. And how we operate. Want to know how bad it gets? Just check out this Brendan Nyhan paper:
An extensive literature addresses ...
From Engadget:
While range is an unfortunate limiting factor for electric vehicles, slow recharging time is perhaps even more troubling. Going 100 miles on a charge would be okay if you could stop at the corner electron stand and top up your cells while hitting the potty, and JFE E
From Engadget:
Can't say we're any keener on the idea of blasting our outlets with Super Soakers, but Wet Circuit's water resistant power strips boast its ability to withstand just such a defiant action -- occasional rain and snow, wet hands, temporary flooding, and accidental wate
From Engadget:
Usually, when we see "stimulus" and "broadband" in the same sentence it's because someone turned off our Google SafeSearch filter, but today we have one such item that is totally safe for work. According to Information Week, the $7.2 billion in broadband grants and l
From mental_floss Blog:
Growing up, my family had a series of early personal computers — a Sinclair ZX81, a TI 99/4A, and even an early IBM Portable (which was not as portable as its name suggested). Today, let's talk about that Sinclair machine. The ZX81 was dirt cheap and
