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#856 |
Ain't no relax!
Join Date: Sep 2005
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The future of data storage...
More data storage? Here’s how to fit 1,000 terabytes on a DVD We live in a world where digital information is exploding. Some 90% of the world’s data was generated in the past two years. The obvious question is: how can we store it all? In Nature Communications today, we, along with Richard Evans from CSIRO, show how we developed a new technique to enable the data capacity of a single DVD to increase from 4.7 gigabytes up to one petabyte (1,000 terabytes). This is equivalent of 10.6 years of compressed high-definition video or 50,000 full high-definition movies. So how did we manage to achieve such a huge boost in data storage? First, we need to understand how data is stored on optical discs such as CDs and DVDs. The basics of digital storage Although optical discs are used to carry software, films, games, and private data, and have great advantages over other recording media in terms of cost, longevity and reliability, their low data storage capacity is their major limiting factor. The operation of optical data storage is rather simple. When you burn a CD, for example, the information is transformed to strings of binary digits (0s and 1s, also called bits). Each bit is then laser “burned” into the disc, using a single beam of light, in the form of dots. The storage capacity of optical discs is mainly limited by the physical dimensions of the dots. But as there’s a limit to the size of the disc as well as the size of the dots, many current methods of data storage, such as DVDs and Blu-ray discs, continue to have low level storage density. To get around this, we had to look at light’s fundamental laws. Circumnavigating Abbe’s limit In 1873, German physicist Ernst Abbe published a law that limits the width of light beams. On the basis of this law, the diameter of a spot of light, obtained by focusing a light beam through a lens, cannot be smaller than half its wavelength – around 500 nanometres (500 billionths of a metre) for visible light. And while this law plays a huge role in modern optical microscopy, it also sets up a barrier for any efforts from researchers to produce extremely small dots – in the nanometre region – to use as binary bits. In our study, we showed how to break this fundamental limit by using a two-light-beam method, with different colours, for recording onto discs instead of the conventional single-light-beam method. Both beams must abide by Abbe’s law, so they cannot produce smaller dots individually. But we gave the two beams different functions: ![]()
The two beams were then overlapped. As the second beam cancelled out the first in its donut ring, the recording process was tightly confined to the centre of the writing beam. This new technique produces an effective focal spot of nine nanometres – or one ten thousandth the diameter of a human hair. The technique, in practical terms Our work will greatly impact the development of super-compact devices as well as nanoscience and nanotechnology research. The exceptional penetration feature of light beams allow for 3D recording or fabrication, which can dramatically increase the data storage – the number of dots – on a single optical device. The technique is also cost-effective and portable, as only conventional optical and laser elements are used, and allows for the development of optical data storage with long life and low energy consumption, which could be an ideal platform for a Big Data centre. As the rate of information generated worldwide continues to accelerate, the aim of more storage capacity in compact devices will continue. Our breakthrough has put that target within our reach.
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#857 | |
Ain't no relax!
Join Date: Sep 2005
Casino cash: $998919
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How about a space-based telescope, that could be accessible to the general public? A mini Hubble type telescope, that you could take a picture of a galaxy a billion light years away, directly from your smartphone?
Meet ARKYD, the space telescope for EVERYONE. This Kickstarter campaign has already raised over $1M, but more is needed. Quote:
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#858 | |
Fantastic Planeteer
Join Date: Oct 2006
Location: Champaign, IL
Casino cash: $10006721
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#859 | |
Ain't no relax!
Join Date: Sep 2005
Casino cash: $998919
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Today would have been Alan Turing's birthday.
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#860 |
(Sir/Yes Sir/Aye Aye Sir)
Join Date: Oct 2009
Location: Diving
Casino cash: $2615380
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Apple owners everywhere have taken the day off to contemplate what could have been...
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. #J24 #Kameltoe Is A Joke Of A VPOTUS and POTUS Candidate #President Trump loves and supports the constitution #McCarthy is a Sellout and Traitor to America #TheFBLieIsCorrupt #DefundTheFBI #The FBI Is Not The Police #PresidentBidenIsMoronic #LizCheneyGotTheBoot #FJB #80,000,000 Mules (and a few Americans too) Voted For COVID To Continue #I still don't have COVID |
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#861 |
Ain't no relax!
Join Date: Sep 2005
Casino cash: $998919
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Hey Carol from Accounting! How's my ass taste?
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#862 |
Ain't no relax!
Join Date: Sep 2005
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For a spacecraft such as the Space Shuttle, the Mir, a Soyuz Capsule or the International Space Station to maintain an orbit around the Earth at relatively low altitudes (anywhere from approximately 175 to 575 kilometers [~95 to 310 nautical miles]) it must travel at approximately 32,500 km/hour (~17,500 nm/hr). At these altitudes and at this velocity it takes about 90 minutes to circle the Earth once, so every 45 minutes the astronauts and cosmonauts onboard see a sunrise and a sunset, a total of 16 each every 24 hours.
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#863 |
(Sir/Yes Sir/Aye Aye Sir)
Join Date: Oct 2009
Location: Diving
Casino cash: $2615380
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You sent your email reply from work to the Blog... Nice!
So yeah, Carol from accounting, how's his ass taste! ****ing bitch, pay him his money (and add interest you slime bucket)!!
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. #J24 #Kameltoe Is A Joke Of A VPOTUS and POTUS Candidate #President Trump loves and supports the constitution #McCarthy is a Sellout and Traitor to America #TheFBLieIsCorrupt #DefundTheFBI #The FBI Is Not The Police #PresidentBidenIsMoronic #LizCheneyGotTheBoot #FJB #80,000,000 Mules (and a few Americans too) Voted For COVID To Continue #I still don't have COVID |
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#864 | |
Fifty eight sixty two...
Join Date: Jul 2005
Location: Felton, DE
Casino cash: $8417676
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I'm certain you know this stuff, so: was he full of shit? |
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#865 | |
Ain't no relax!
Join Date: Sep 2005
Casino cash: $998919
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Quote:
It's really no different than a skydiver in free fall after jumping out of a plane, except that the atmosphere isn't continually resisting and pushing back against the person. Because the space station is higher than most of the atmosphere. So you don't have the "Wind rush" pushing back up against the falling body. That's why free fall in outer space looks more like floating. But if you would take away the resistance of the atmosphere in the case of a skydiver, it would look and feel exactly like a "Floating" astronaut in orbit. Here's a much lengthier and detailed explanation: http://www.nasa.gov/centers/glenn/sh.../microgex.html
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#866 | |
"Think BOOM!"
Join Date: Nov 2003
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Quote:
That's very different that other orbits, such as geosynchronous.
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I think the young people enjoy it when I "get down," verbally, don't you? |
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#867 |
"Think BOOM!"
Join Date: Nov 2003
Location: 33.675° N 106.475° W
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Voyager reaches mystery interstellar doorstep
Voyager’s prolonged journey into interstellar space took another dramatic turn when the intrepid space probe last summer passed into a bizarre and unanticipated cosmic hallway between the bubble of space under the sun’s influence and whatever lies beyond. On the celestial highway since September 1977, the Voyager 1 probe soared past Jupiter and Saturn in 1979 and 1980, respectively, then ended up an a path that led toward interstellar space. Eventually, the spacecraft will get there, but exactly when that will happen -- and what else it may encounter before then -- is anybody’s guess. “The results of the measurements from Voyager have been surprising us not just since last August, but for about the last 2.5 years,” astronomer Stamatios Krimigis, with Johns Hopkinds University’s Applied Physics Laboratory, told Discovery News. Scientists thought Voyager 1 had finally passed beyond the heliosheath, the outermost region of space touched by the solar wind, a stream of charged particles continuously flowing the sun. On Aug. 25, 2012, Voyager suddenly found itself in an uncharted region of space, marked by the abrupt disappearance of particles from the sun and the sudden rise of particles emanating from interstellar space. “As far as we could tell there was absolutely no solar material in the vicinity of the spacecraft and there hasn’t been since then. At the same time, the cosmic rays coming from outside the system started to increase. We all thought at the time that, by God, we were probably out of the solar system,” Krimigis said. But there were two other puzzling bits of data that didn’t fit that scenario. The first mystery was why the magnetic field Voyager measured was still aligned like the sun’s -- and even more perplexing, why the magnetic field suddenly strengthened. Scientists had expected to see a different magnetic orientation once Voyager was in interstellar space. The second conundrum was why the cosmic ray particles were not evenly distributed. The thinking was -- and is -- that cosmic rays, which emanate from distant supernova explosions all over the galaxy, should be uniformly spread out in every direction in interstellar space. The best scientists can conclude is that Voyager is in some sort of foyer where particles from inside and outside the solar system can easily flow, but which is not quite yet in interstellar space. The rather unpoetic name they came up for this zone is the “heliosheath depletion region.” “What we have is kind of a hybrid. The magnetic field still seems to be the solar magnetic field, not the interstellar magnetic field, so how do you define interstellar medium if that’s the case? If you really need to finally reach the case where both the magnetic field and the plasma are from other stars, then we’re still not there,” lead project scientist Ed Stone, with the California Institute of Technology in Pasadena, told Discovery News. Scientists have no idea how much longer it will take Voyager to reach the next and presumably last leg of its journey into interstellar space, but the proverbial clock is ticking. The spacecraft, which is powered by the slow decay of radioactive plutonium, will begin running out of power for its science instruments in 2020. “By then, we would have shut off everything we can shut off other than the instruments and will have to turn off the first instrument. As time goes on, each year there are four watts less available, we’ll have to turn off the second instrument,” Stone said. By 2025, Voyager, which was originally designed to last just five years, will be completely shut down. Voyager is now about 122 times farther from the sun than Earth. At that distance it takes radio signals from Earth traveling at the speed of light 17 hours to reach the spacecraft. A sister spacecraft called Voyager 2 is taking a different path toward interstellar space and has not yet encountered the panoply of twists and turns on the solar system’s exit ramp -- and it never may. “Voyager 2 has seen exactly what the models predicted we would see, unlike Voyager 1, which didn’t,” Stone said. The region where the heliosheath and interstellar space connect, where Voyager 1 is located, may be a local phenomenon, he added. Read more: http://www.foxnews.com/science/2013/...#ixzz2XpDNptHA
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I think the young people enjoy it when I "get down," verbally, don't you? |
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#868 | |
Is this it?
Join Date: Jan 2004
Casino cash: $10007847
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Quote:
The same orbital theories can give us the Lagrange Points where the gravity effects of two large objects can give regions where a much smaller object suspended in these areas around the larger ones. We do find asteroids in those areas. These points are locations were an answer can actually be obtained analytically for 3 bodied orbital equations. The whole of the solar system, is actually more like constantly trying to remain balanced upon a bicycle. All the different forces seem to balance out on a 4 dimensional field though. These do seem different. Is this your meaning.
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Even a superstitious man has certain inalienable rights. He has a right to harbor and indulge his imbecilities as long as he pleases. . . He has a right to argue for them as eloquently as he can, in season and out of season. He has a right to teach them to his children. But certainly he has no right to be protected against the free criticism of those who do not hold them. He has no right to demand that they be treated as sacred. He has no right to preach them without challenge." -H.L. Mencken |
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#869 |
Live free or die hard
Join Date: Sep 2000
Location: Durango, CO
Casino cash: $1528382
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Imagine those canines going through your femur. And what's that chin all about. WOW!
![]() Millions of years ago, strange-pouched predator stalked South America with fangs bigger than those of the fearsome saber-toothed cat did. It stabbed its prey with its huge, saber-like teeth. Now, new study reveals a bit more about the predator's dental profile and its hunting strategies, which may reveal a little bit more about saber-toothed animals in general. This ancient carnivore packed most of its power in a robust set of arms, strong neck muscles and knack for precision, researchers say. Like Us on Facebook The findings are published in the journal PLOS One. Known as Thylacosmilus atrox, this animal looked and behaved like nothing alive today. Its closest living relatives are the Australian and American marsupials, but even they fail to show precisely the animal's behavior and skills of hunting. Thylacosmilus atrox had larger teeth proportionally to its body in comparison with saber-tooth tiger Smilodon fatalis, making it one of the more interesting saber-toothed animals to study. These animals were separated by at least 125 million years of evolution. In the new study, scientists constructed and compared sophisticated computer models of both the saber-toothed tiger and Thylacosmilus to learn their behavior and hunting strategies. These models were then "crash-tested" in simulations of biting and killing behavior. This allowed the scientists to determine exactly how these creatures may have subdued their prey. "We found that both saber-tooth species were similar in possessing weak jaw-muscle-driven bites compared to the leopard, but the mechanical performance of the saber-tooths' skulls showed that they were both well-adapted to resist forces generated by very powerful neck muscles," said Stephen Wroe, leader of the research team, in a news release. "But compared to the placental Smilodon, Thylacosmilus was even more extreme." Thylacosmilus' bite was less powerful than a domestic cat, yet its skull easily outperformed the saber-tooth tiger in response to strong forces from hypothetical neck muscles, say researchers. Then, how did they hunt? Thylacosmilus first held its prey to the ground with its powerful arms and then, with great precision, tore down with its relatively delicate teeth. This allowed it to make a quick meal. Thylacosmilus became extinct 3.5 million years ago, and it had the largest canines of any known saber-toothed beast. Its fangs constantly grew throughout its lifetime and had roots extending even into its skull. The teeth also fit over long sheath-like ridges that extended down from the animal's lower jaw. "It may not have been the smartest of mammalian super-predators-but in terms of specialization, Thylacosmilustook the already extreme saber-tooth lifestyle to a whole new level," said Wroe in a news release. http://www.designntrend.com/articles...illed-very.htm |
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#870 | |
The only way to Travel.
Join Date: Oct 2000
Location: In the car
Casino cash: $4773602
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