Hi guys,
I am currenly in the midst of designing a system grounding for a 6.6kV 3 phase Generator.
Basically, i am just following my customer's specifications for the system grounding according to their Single Line Diagram.
They have rated their Neutral Grounding Resistor
I would like to create a very large adiabatic decompression device. My goal is to force the majority of the ambient water vapor(humidity) to go through a phase change back into liquid (like a fog). How would you design a machine that could adiabatically decompress 5,000 cubic meters of ambient ai
Former Vice President Al Gore and Foreign Minister Jonas Gahr Støre presented their global report on melting ice at a side event of the United Nations Climate Change Conference in Copenhagen (COP 15) on Monday, December 14th.
Read the report “Melting snow and ice. A call for action”.
Press release on the report
The event will be available as webcast on the UNFCCCs website (United Nations Climate Change Conference)
Danish Minister of Foreign Affairs Per Stig Møller and Greenland Premier Kuupik Kleist also participated to present a report on the melting of the Greenland ice sheet.
“The report shows that snow and ice are melting at an alarming rate, and that the cryosphere is very vulnerable to climate change. The most important new findings relate to Antarctica. Mighty Antarctica, which previously seemed immune to the loss of ice that has occurred in other areas, shows signs of a net reduction of ice on a similar scale to that of inland Greenland.
“This gives cause for concern. The overriding message is that we have to succeed in Copenhagen. The countries of the world must agree on measures that limit emissions of greenhouse gases, and restrict global warming to two degrees. Furthermore, we need an emergency plan for the crysosphere, with immediate measures to save as much of our ice and snow cover as possible. We should start by cutting emissions of short-lived drivers of climate change such as soot and ozone, which are not included in any climate agreement today, and we also need to pay more attention to short-lived greenhouse gases such as HFCs and methane. Measures to reduce these would have immediate effect and cost relatively little,” said Mr Støre.” Read more of the press release here.
Findings also released this week included a report on the loss of glaciers in Tibet and what is causing it, from a group of scientists including NASA scientist James Hansen. See the report findings below.
Both the Tibetan plateau and the glaciers are under threat from climate change and from China. China burns an immense amount of coal, and black soot from this coal burning is adding to the demise of the glaciers. China is also building walls and roads around the Tibetan plateau and altering the ecosystem of the grasslands there, according to a Tibetan delegation that spoke at the Copenhagen climate summit last week. James Hansen and several other scientists released a paper on Monday, December 14th, and found that reducing CO2 and black soot are necessary to save the glaciers and guarantee water for the people there in the coming years. The Tibetan plateau is a normally arid region to begin with and removing the glacier water would threaten all life there. Them scientists write:
“We find evidence that black soot aerosols deposited on Tibetan glaciers have been a significant contributing factor to observed rapid glacier retreat. Reduced black soot emissions, in addition to reduced greenhouse gases, may be required to avoid demise of Himalayan glaciers and retain the benefits of [...]
You want ASCII paintings? We got ASCII paintings! You want ASCII furniture? We got ASCII furniture! You want ASCII jewelry? Becky Stern got it for you: The I <3 You necklace.
Pretty. I dig. [ASCII Heart Necklace]
Pepper Potts is smooching with Iron Man's helmet, a crazy guy is waving even crazier whips, and things are going boom-Boom-BOOM! I don't think I could get any more excited for this movie nor can May 2010 come soon enough.
Hit up the link for the trailer in all its HD glory and tell me that you didn't drool a little bit too. [Apple —Thanks, Marco!]
Kindly inform me how I can calculate the nominated Voltage test value required for Megger Testing of 11KV motor.
your kind immediate reply is highly appreciated.
Thanks
Mustafa
There's been plenty of speculation as to when Verizon will begin offering the Palm Pre or the Pixi, but some leaked internal training slides would suggest that it'll be sooner rather than later.
According to Phone Arena these 20-minute long training sessions are "to re-introduce Palm and webOS to [Verizon's] personnel [and] will be ongoing until January 4, 2010," so we could speculate that there'll be some excitement in the first quarter of the year. Ah well. At least we can enjoy the catchy tune of the Pixi commercial while we wait. [Phone Arena via Engadget]
These 380-micrometer gears are being turned by hundreds of common bacteria swimming in a liquid solution. Scientists think this discovery could signpost a path to the development of "smart materials" that close the gap between man-made and organic matter.
A collaborative effort between scientists at Northwestern University and the United States Department of Energy discovered that common bacteria can power simple machines like the one seen above. Stimulated by oxygen, the swimming bacteria are able to push gears that are millions of times their size.
Igor Aronson, a lead scientist on the project, envisions a future in which these types of bacteria-powered micromachines make up a material that could "dynamically alter its microstructures, repair damage, or power microdevices." Presumably they won't quit their day jobs of decomposing stuff and making us sneeze. [PRWeb]
Working, playing and socializing on the internet can give you tunnel vision. What about the technophobes? The luddites? The olds? What can you give someone like that? Here are the best gifts for people who just don't "get" the internet.
If you hate galleries more than Aunt Georgeanne hates the radical left wing internet blogs, click here.
Rick Astley's Greatest Hits: Without the internet, Rick Astley would have been completely forgotten by now. Rickrolling, which stopped being funny almost immediately after it started being funny, gave him a new life—on the internet. To everyone else, he's at best a faded, distant memory, or at worst, "not dead? Really?" So think of this as less of a gift—it's cheesy and retro and whatever, just come up with an excuse—and more as a lab experiment in memetic abiogenesis: specifically, to see if the horrid Rickrolling phenomenon can spawn on its own, without the internet, in your giftee's living room. If not, you could still be privy to the extremely rare sight of a human enjoying Rick Astley unironically. $8 [Amazon]
A Blog-to-Book: Perhaps the best thing about people who never use the internet is how they aren't as cynical as we are about spending money. A LOLcats book? Why the fuck would I buy that? LOLcats are free, like the air we breathe! Or copyrighted music! If your giftee isn't aware of a certain blog—or blogs in general—then this discrepancy doesn't exist. Also, whatever meme the blog/book/blook was riding on probably never really left cyberspace, so the humor will be super-fresh. Or nonsensical, depending on what you choose. This is Why You're Fat, Lolcats, Found. Any of them will work. From $8 [Amazon, Amazon, Amazon]
The WikiReader: OpenMoko's WikiReader comes with a relatively recent copy of the entire text contents of Wikipedia, and without any kind of network connection. It's the best thing about the internet, without any of the internet. Just tell whoever you're giving it too that it's exactly like their old encyclopedia set, except smaller and with a few extra books devoted to Sci-Fi character taxonomies. $100 [WikiReader]
An online newspaper subscription: This one serves two purposes: to help the recipient bridge the meatspace-to-digital gap with a familiar concept and brand name; and to assuage your guilt for reading newspapers' content for free for all these years. You're basically making a pure donation with this one, but it will encourage your grandparents to get down to the library and give the ol' WSJ a whirl on one of those computer devices, too. Varied [WSJ, NYT, USAT]
Polaroid: If you're feeling generous, a camera. If your giftee already has a Polaroid camera, then get them as much film as you're willing to shell out for. Polaroids are like digital cameras for luddites, and Polaroid shut down their instant photography business back in 2008, supplies have been getting sparse. $170 for a new Polaroid One600 (though used cameras go for much, much less); film at about $40 for ten sheets. [Amazon, Buy]
A Roku Box: Old people and Netflix are perfect for each other: old people aren't very good at moving around, and they live to watch moving pictures. People know what Netflix is, and the know how it works. What they don't know, or don't care to think about, is that their subscriptions come with free digital streaming, which, despite the name, is actually more old-friendly than DVDs—just sit, click, and watch. $100 [Amazon]
Gag T-Shirts: There may not be a whole lot of overlap between people who wear joke shirts and people who don't really go online much, but anyone can enjoy a good Threadless shirt—creepily crude uncles, same-joke-telling dads and kids whose parents don't allow them to use the computer are all especially good candidates here. How does this fit into the guide? Well, the quality gulf between online novelty shirts (Threadless, Busted Tees) and offline novelty shirts (Hot Topic, Wings) is vast. Choose to taste. From $10 [Threadless, BustedTees]
Don't Buy a computer: Computers are getting cheap enough to be giftable, it's true! In this day in age, if someone isn't online, they're probably making a conscious choice. Dragging them into the 21st century will cause nothing but pain. For your giftee, because whatever kept them away from the internet has probably only gotten worse since they last tried it at the public library; for you, because you will forever be bound in servitude as this person's personal, all-hours tech support team.
All Giz Wants is our annual round-up of favorite gift ideas, including amazing attainable objects and a few far-out fantasies. We'll be popping guides catered to different interests regularly until Christmas, so keep checking back.
That's right...ass. Why? Because that's where inmates cram 'em. So it looks like the Bloodhound here will be pointing directly the backside of a lot of prison jumpsuits.
In all seriousness though, contraband cellphones are becoming a major problem in prisons throughout the country. One solution, cellphone signal jamming, has already been passed by the Senate. Bloodhound is intended to be an alternative to jamming—a device that sniffs out cellphone RF signals using a high speed scanning multi-band receiver harnessed to a DF-Direction Finding Antenna.
The problem with all of this is that prison guards would each need a detector, and they could only get results when the cellphones are actually in use. So, it seems like the best solution is still jamming cellphones en masse. In that scenario, the FCC would be required to lay out rules and ensure that legitimate communications are not blocked, which negates Bloodhound's one major advantage. [BVS and PR Newswire via Coolest Gadgets]
Santa has a "magic sack" and flying reindeer, but his sleigh is kind of old fashioned. GE has thought about this momentous problem and has come up with a tricked out solution using all kinds of proprietary technology.
Using this interactive app, you can virtually explore the sleigh and learn more about the gadgetry GE has built-in. They have thought of everything—including a wireless medical sensor that keeps tabs on the old man's breathing and heartrate. I mean he is like 200 years old. You never know when he will have a heart attack, fall from the sleigh and crash land in some kids living room. Haha...traumatic. [GE]
For some time now, any animated .gif files I upload to a post do not work (as in "are not animated").
This is a shot of the frames of an animated smilie, before upload & after retrieving it using "right click - save picture as":
Here's the smilie for you to play with:
My
Doctors at the University of Miami have developed an improvised way to perform a long-distance organ transplant involving the islet cells of the pancreas, which produces insulin and other enzymes the body requires.
A 21-year-old Air Force enlistee, Tre Francesco Porfirio, was shot while on duty in Afghanistan and his pancreas was essentially destroyed. With an injury like that, Porfirio’s prognosis was very difficult: If he could survive long enough to get to a specialized transplant center, he could perhaps get a transplant of islet cells from a deceased donor and take anti-rejection drugs for the rest of his life. Or doctors could remove his pancreas, leaving him completely dependent on insulin. Either way, an early death from complications of Type 1 diabetes was highly likely [Los Angeles Times].
So doctors went with an experimental procedure that involved removing the young man’s pancreas, flying it from Walter Reed Army Medical Center in Washington, D.C. to the University of Miami’s Miller School of Medicine. There, a team of doctors, led by Camillo Ricordi, director of the University of Miami’s Diabetes Research Institute, removed and purified the islet cells, flew them back to Walter Reed, and fed them back into Porfirio’s liver through a tube. Within days the cells in the liver began to produce insulin, basically doing the work of the removed pancreas.
Only 15 cities have medical centers equipped to prepare islet cells for transplant, but the new procedure is a way to expand the centers’ reach. Porfirio is unusual also in that his islet cells came from his own pancreas, which, while in shreds, was not dead yet. Most patients must rely on a deceased donor’s pancreas and must take anti-rejection drugs to ensure their immune system doesn’t attack the foreign cells. The ability to use Porfirio’s own islet cells for the transplant, while “very rare,” according to Ricordi, means he will not face rejection issues that make such transplants a lifelong challenge for recipients [Los Angeles Times]. The transplant was performed around Thanksgiving, and is the first of its kind. This procedure, although undoubtedly expensive, may one day become available to patients that have not only suffered pancreatic trauma, but also to those with chronic pancreatitis.
Related Content:
Scientists Make Rabbit Penis Replacement Parts; Male Rabbits Rejoice
Patients Waiting for Lung Transplants May Soon Breathe a Sigh of Relief
Doctors Work Towards Womb Transplants–But Are They Ethical?
You know the prevailing posture of a bat in repose—hanging upside down. All but six of the known 1,200 bat species in the world roost with their heads down, but now naturalists have had the chance to study a Madagascar bat that not only roosts right-side-up, it hangs onto surfaces in a totally unexpected way.
Myzopoda aurita is endangered and listed as vulnerable to extinction. But a team lead by Brown University’s Daniel Riskin got to travel to Madagascar and found colonies of the bat in newly grown forests. There they found that the bat roosts right side up by deploying a kind of liquid adhesive.
This was a surprise. As you can see in the image, Myzopoda aurita appears to have sucker-type feet like many bats do. But by demonstrating that the bat could stick to both surfaces with tiny holes and surfaces with those holes covered by tape, the researchers showed that it wasn’t using suction to stick (if it was, the bat wouldn’t be able to create a seal and therefore couldn’t stick to the holey surface). They also discovered a nomenclature problem on their hands. From Science Daily:
While the finding settles the question of how the bats roost, it means science has misnamed the bat. “Myzopoda literally means ’sucker foot,’” Riskin, the paper’s lead author, said. “You can’t change Latin names, so it’s stuck with it.”
For the whole story on Myzopoda, see “Spiderman’s Bats” by DISCOVER blogger Carl Zimmer.
Related Content:
Discoblog: Unique Gift Idea: Name Your Own Bat Species
80beats: Green vs. Green: Judge Halts Wind Project to Protect Rare Bats
80beats: Madagascar Chameleon Makes the Most of a 4-Month Life
Image: Brown University
Holy yikes: an iceberg 25 kilometers across that broke off of Antarctica in 2000 has made a break for it and is headed toward Australia! Check this out:
Whoa. The berg has been monitored from space by NASA since November. Usually, they circulate around Antarctica due to currents there but this one managed to escape, and is drifting northeast toward Australia’s south-southwest coast. Since it broke off the main ice mass it shrank from 140 square kilometers (and may I say HOLY CRAP 140 SQUARE KILOMETERS! That’s 54 square miles!) down to 115 square km.
If you’re not sure how big that is, then think on this: Manhattan is 88 sq km. It would fit comfortably inside that iceberg.
NASA is monitoring this berg using the Terra and Aqua satellites designed for just this purpose. A shipping warning has been issued — though it may be hard to miss a chunk of ice 20 freaking kilometers across, the berg itself is calving, and smaller shards could be a hazard to ships in the area.
That is a whole lot of ice. I can’t help thinking: it’s actually bigger than the Kuiper Belt Object spotted by Hubble which I wrote about earlier. And it’s a whole lot closer. Wow.
How is your brain like a telegraph? Check out my latest column in Discover for the answer.
Artists concept of smallest KBO. Click for larger. Credit: NASA, ESA, and G. Bacon (STScI) Science Credit: NASA, ESA, and H. Schlichting (Caltech)
The image shown here is an artist concept depicting Hubble’s detection of the smallest Kuiper Belt Object or KBO yet found.
You might be wondering why there is an artists concept and not the actual image. The object, just 3,200 feet across, is estimated to be 4,200,000,000 miles away and “shines” at 35th magnitude that’s 100 times fainter than even Hubble can see!! I guess “shines” isn’t really a good term, but you know what I mean.
The image was found by it occultation of a star. The KBO passed in front of a star causing it to wink out briefly. By knowing the instrument on Hubble samples changes 40 times a second, the researchers involved determined the event to last 0.3 seconds so they could calculate how large something would be to have to be.
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