Tem Modelos de Comboios, é claro que passa aqui!
Estação 15 - 3º Encontro de Ferreomodelismo de São Carlos - SP
... A Muídagem fica ASSIM:
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Estação 15 - 3º Encontro de Ferreomodelismo de São Carlos - SP
Um exemplo a seguir...Dyson to advise government
Entrepreneur James Dyson has been recruited by the government to give advice on how to boost innovation and productivity.
The inventor of the see-through Dyson vacuum cleaner is being asked to help Trade & Industry Secretary Patricia Hewitt to come up with ways of helping the UK to compete against countries with much lower trading costs.
Mr Dyson has first-hand experience of the problems.
Last year he caused controversy by moving production of his vacuum cleaners from Malmesbury in Wiltshire to Malaysia, with the loss of 800 jobs, although for 210 of the workers alternative roles were found at Dyson's headquarters.
Um novo tipo de Telescópio, qua vai ver o Universo com 500 vezes mais detalhe, e ainda por cima vai ser MAIS BARATO!
Airbus Plane of the Future Concept Has Smart Fuselage, See-Through WallsBy Rebecca Boyle Posted 07.21.2010 at 2:30 pm
Concept Plane Airbus unveiled this 2030 concept plane at the 2010 Farnborough International Airshow. Airbus
Of all the aviation tech emerging from the Farnborough International Airshow, Airbus’ futurist visions are among the coolest.
The aviation firm unveiled its 2030 Concept Plane earlier this week, which includes dreams of a self-cleaning cabin; extra-long, slim wings; a U-shaped tail; and an intelligent fuselage designed to improve efficiency.
Airbus acknowledges the plane is somewhat a flight of fancy, but it’s worth imagining how aviation would look if advancements in existing technologies “continue apace,” as the company puts it.
New Redshift-Scanning Technique Could Create Map of the Universe with 500 Times More Detail
By Clay Dillow Posted 07.21.2010 at 5:30 pm
It took mankind centuries to map the Earth, and even with all of the indexed knowledge in the world behind it Google can't always figure out exactly where the nearest Pinkberry is. So one might imagine how even with the amazing leaps in technology over past decades, mapping the universe is no small undertaking. But a new technique could allow cosmic cartographers to map 500 times as much of the universal landscape as they have thus far at a fraction of the cost.
We don't know a whole lot about dark matter, outside of the fact that gravity suggests that it's there. But we do know that galaxies exist in a sort of dark matter web that runs throughout the universe. Using luminous galaxies as waypoints, astronomers have been able to map this cosmic web to some extent, but galaxies more than 5 billion light-years away are too dim to survey. Since we know that the leftovers of the Big Bang have left us with a far-off waypoint that we've determined to be about 45 billion miles away, we can be sure that we haven't mapped the vast majority of the observable universe because we simply can't see it.
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NASA detecta maior molécula existente no espaçoO Telescópio Espacial Spitzer descobriu no espaço, pela primeira vez, moléculas de carbono conhecidas como "buckyballs", uma espécie de bola de futebol formada por 60 átomos de carbono. Leia mais...
Scientists Discover Most Massive Star
Published July 21, 2010
LONDON -- A huge ball of brightly burning gas drifting through a neighboring galaxy may be the heaviest star ever discovered -- hundreds of times more massive than the sun, scientists said Wednesday after working out its weight for the first time.
Those behind the find say the star, called R136a1, may once have weighed as much as 320 solar masses. Astrophysicist Paul Crowther said the obese star -- twice as heavy as any previously discovered -- has already slimmed down considerably over its lifetime.
In fact, it's burning itself off with such intensity that it shines at nearly 10 million times the luminosity of the sun."Unlike humans, these stars are born heavy and lose weight as they age," said Crowther, an astrophysicist at the University of Sheffield in northern England. "R136a1 is already middle-aged and has undergone an intense weight loss program."
Safer, Longer-Lasting Batteries for Cars
A startup company has a printing method for solid-state batteries.
By Katherine Bourzac
An Orlando startup has developed new manufacturing techniques that could improve the stability and lifetime of batteries used in electric vehicles. Planar Energy, a spin-off of the National Renewable Energy Laboratories (NREL), is working on scaling up solid-state lithium-ion batteries.
Conventional batteries, which typically use a liquid electrolyte, can suffer from undesirable chemical reactions that damage the battery's cathode. Replacing the liquid electrolyte with a solid ion conductor can improve battery stability and lifetime, and also allow a battery to be smaller because additional components aren't needed to maintain stability. Solid electrolytes are also compatible with a wider range of battery chemistries that could potentially offer higher power or storage density.
But solid-state batteries are expensive to make and have been difficult to scale up to the size needed for laptops or vehicles. Like other solid-state devices, solid-state batteries are normally made using complex, costly, vacuum-based deposition methods. The vacuum deposition limits the thickness of solid-state batteries, which, in turn, limits their energy storage capacity. So these thin-film batteries have been limited to use in small devices.
Synthetic Cell-Like Microcapsules Communicate Like Biological Cells, Cooperate Like Ants
By Clay Dillow Posted 07.20.2010 at 5:02 pm
Taking cues from slime molds, ants, and living biological cells, a team of University of Pittsburgh researchers has designed a system of artificial cells that can communicate with one another and cooperate to carry out tasks. The computer models they've devised could lead to artificial cellular systems that perform highly specialized jobs at the microscopic level.
The artificial cells are more like microcapsules that can move independently and deposit cargo wherever it's needed. But directing these microcapsules -- or more accurately, getting them to direct themselves -- is the real breakthrough.
E progressos na decifração de textos por Computador, levaram à traducão da Língua Ugártica.
Graphene soaks up arsenic
Researchers have found yet another use for the wonder material graphene. A composite material made from reduced graphene oxide and magnetite could effectively remove arsenic from drinking water, according to new work done in South Korea.
Graphene is a sheet of carbon just one atom thick that also exists as an oxide. Reduced graphene oxide (RGO) is a chemical state of the material that has gained electrons. The purification process works by dispersing a magnetite-RGO composite in water, where it soaks up arsenic. The composite is then quickly and efficiently removed from the water using a permanent magnet.
The Physics and Applications of Superconducting Metamaterials
We summarize progress in the development and application of metamaterial structures utilizing superconducting elements. After a brief review of the salient features of superconductivity, the advantages of superconducting metamaterials over their normal metal counterparts are discussed. We then present the unique electromagnetic properties of superconductors and discuss their use in both proposed and demonstrated metamaterial structures. Finally we discuss novel applications enabled by superconducting metamaterials, and then mention a few possible directions for future research.
The Advantages of Superconducting Metamaterials
Metamaterials are typically constructed of “atoms” that have engineered electromagnetic response. The properties of the artificial atoms are often engineered to produce non-trivial values for the effective permittivity and effective permeability of a lattice of identical atoms. Such values include relative permittivities and permeabilities that are less than 1, close to zero, or negative. For concreteness, we shall consider below the scaling properties of metamaterials made of traditional “atomic” structures, like those used in the early metamaterials literature. Traditional metamaterials utilize wires to influence the dielectric properties by manipulating the effective plasma frequency of the medium. The magnetic properties of Split-Ring Resonators (SRRs) are utilized to create a frequency band of sub-unity, negative or near-zero magnetic permeability.
Substantial losses are one the key limitations of conventional metamaterials. As discussed in detail below, Ohmic losses place a strict limit on the performance of metamaterials in the RF – THz frequency range. In contrast to normal metals, superconducting wires and SRRs can be substantially miniaturized while still maintaining their low-loss properties. For comparison, as the size of normal metal wires and SRRs are decreased. These deleterious effects do not happen with superconducting wires and SRRs because the resistivity is orders of magnitude smaller, and the electromagnetic response is dominated by the reactive impedance. Superconductors will only break down when the dimensions become comparable to the coherence length, or when the induced currents approach the critical current density (Jc ~ 10^6 – 10^9 A/cm2).
Novel Superconducting Metamaterial Implementations
A number of novel implementations of superconducting metamaterials have been achieved in addition to superconducting split rings and wires. Here we present results on several classes of superconducting metamaterials.
* Superconductor/Ferromagnet Composites* DC Magnetic Superconducting Metamaterials
The general idea is to take a solid diamagnetic superconducting object and divide it into smaller units, arranging them in such a way as to tailor the magnetic response. The cloak would shield a region of space from external DC magnetic fields, and not disturb the magnetic field distribution outside of the cloaking structure.
* SQUID Metamaterials
They considered a two-dimensional array of RF SQUIDs in which the Josephson junction was treated as a parallel combination of resistance, capacitance and Josephson inductance. Near resonance, a single RF SQUID can have a large diamagnetic response. In an array, there is a frequency and RF-magnetic field region in which the system displays a negative real part of effective permeability. The permeability is in fact oscillatory as a function of applied magnetic flux, and will be suppressed with applied fields that induce currents in the SQUID that exceed the critical current of the Josephson junction. Related work on a one-dimensional array of superconducting islands that can act as quantum bits (qubits) was considered by Rakhmanov, et al. When interacting with classical electromagnetic radiation, the array can create a quantum photonic crystal that can support a variety of nonlinear wave excitations. A similar idea based on a SQUID transmission line was implemented to perform parametric amplification of microwave signals
Through Neutrino Eyes: Ghostly Particles Become Astronomical ToolsNeutrinos are no longer just a curiosity of physics but a practical tool for astronomy
By Graciela B. Gelmini, Alexander Kusenko and Thomas J. Weiler
- Neutrinos will give astronomers a type of x-ray vision far better than actual x-rays. Being the most unreactive type of subatomic particle, they pass through intervening matter as though it were hardly there—revealing the cores of stars and other dramatic but otherwise hidden places in the cosmos.
- Alas, the very property that makes neutrinos so useful means they tend to fly through detectors without registering. Only this year have instruments become sensitive enough to detect cosmic sources unequivocally.
- Neutrinos come in multiple varieties and can metamorphose in midflight. This peculiar property provides additional information about their celestial origins.
Divers find what is thought to be the world's oldest drinkable champagne'It was fantastic ... it had a very sweet taste ... very small bubbles'
STOCKHOLM — Now that's some vintage bubbly.
Divers have discovered what is thought to be the world's oldest drinkable champagne in a shipwreck in the Baltic Sea, one of the finders said Saturday. They tasted the one bottle they've brought up so far before they even got back to shore.
Diving instructor Christian Ekstrom said the bottles are believed to be from the 1780s and likely were part of a cargo destined for Russia. The nationality of the sunken ship has not yet been determined.
"We brought up the bottle to be able to establish how old the wreck was," he told The Associated Press. "We didn't know it would be champagne. We thought it was wine or something."
Ekstrom said the divers were overjoyed when they popped the cork on their boat after hauling the bubbly from a depth of 200 feet.
"It tasted fantastic. It was a very sweet champagne, with a tobacco taste and oak," Ekstrom said.
The divers discovered the shipwreck Tuesday near the Aland Islands, between Sweden and Finland. About 30 bottles are believed to be aboard the sunken vessel.
China has a Catalyst to Convert Shale Oil Directly into Transportation Fuel
In China, reserves of oil shales account for about 500,000 billion tons. It is distributed mainly in Fushun, Liaoning province, Huadian, Jilin province, and Maoming, Guangdong province... However, the shale oils produced from oil shales contain a considerable amount of heteroatomic compounds, especially unsaturated hydrocarbons, which may cause many troubles, such as, instability of fuel during its transportation or storage...Catalytic hydrotreating may be considered as the only convenient way to remove heteroatomic compounds from shale oil. However, many papers showed that severe process conditions were needed during catalytic hydrotreating of shale oils. The concentrations of heteroatomic compounds in shale oils could be reduced, but they were still too high to be used as a transportation fuel. Denitrogenation was more difficult than desulfurization for shale oils.
'Biggest canal ever built by Romans' discoveredOne of the biggest canals ever built by the Romans in an ancient port as important as Carthage or Alexandria has been discovered by British archaeologists.
By Nick Squires in Rome
Scholars discovered the 100-yard-wide (90-metre-wide) canal at Portus, the ancient maritime port through which goods from all over the Empire were shipped to Rome for more than 400 years.The archaeologists, from the universities of Cambridge and Southampton and the British School at Rome, believe the canal connected Portus, on the coast at the mouth of the Tiber, with the nearby river port of Ostia, two miles away.
Shimizu continues to introduce our vision for the future.
We tackle new technological challenges and present wide-ranging proposals for the benefit of up-coming generations.
Mercury Home to Violent Magnetic Storms, Ancient VolcanoesBy Charles Q. ChoiSPACE.com Contributor
The small, rocky planet also experienced volcanic activity for much longer than once thought, according to several new studies based on observations during the latest flyby of the small, rocky planet by a NASA spacecraft.
The new findings come from data collected by NASA's MESSENGER spacecraft, which unearthed even more secrets about the closest planet to the sun during its third and last flyby of Mercury last September. To start, the probe discovered Mercury's magnetic field, or "magnetosphere," apparently releases energy in violent magnetic disturbances called substorms far more extreme than comparable ones seen on Earth, which include spikes in the size and intensity here of colorful auroras and the outermost Van Allen radiation belt.
UFO Over Chinese Airport Video: Spectular Video of China UFOJuly 15, 2010By LBG1
UFO Closes Chinese Airport, Stunning Video of UFOSpectacular video footage of a UFO which closed Hangzhou’s Xiaoshan Airport on July 7th. According to the site Tucson Citizen, there was another sighting of the same UFO one week later hovering over Chongqing’s Shaping park.
Discovering Earth's Hidden Diamonds Just Got EasierBy Karen Rowan, Life's Little Mysteries Managing Editor14 July 2010 1:45 PM ETDiamond prospectors know that the secret to finding diamonds is to locate rocks called kimberlites. A new study in Nature this week may help them focus their search a bit more closely, and also reveals a new understanding of the Earth's mantle.Kimberlites – named after the South African town of Kimberley where they were first diamond was discovered – are generally only found in very old parts of the Earth's crust. They are the sites of small but violent volcanic eruptions that brought material – including diamonds – spewing to the surface. No one has ever seen a kimberlite erupt – the most recent took place about 40 million years ago, said study author Kevin Burke, a geologist at the University of Houston.
Monday, July 12, 2010
Cheap E-Paper Displays Coming to a Store Near YouNemoptic's new e-paper technology is cheap and efficient enough to be used almost anywhere.By Christopher Mims
Technically, the e-paper race is full of dark horses--including the sector leader itself, E-Ink, whose electrophoretic e-paper technology, used in the Kindle and countless other e-paper devices, is threatened by upstarts like Apple's iPad and forthcoming hybrid "transflective" LCD / e-paper displays from Pixel Qi.
But to declare the race for e-paper dominance over is to forget just how widespread and diverse are the uses of dead-tree paper: every one of which represents an opportunity for e-paper manufactures.
Nemoptic, which has yet to partner with a hardware maker willing to put their displays into a proper e-reader, has managed to carve out a niche for itself by following this logic, and creating an e-paper display usable in place of those little tags on the front of grocery store shelves that tell you the prices of goods.
Apparently the ability to remotely update prices on store shelves from a centralized computer is labor-saving enough that retailers throughout Europe and Asia are jumping on the e-paper bandwagon.
Fabricating a Multifunctional Fiber
Fibers that carry light and sense pressure could be used for medical imaging and structural monitoring.
By Katherine Bourzac
Researchers at MIT have developed optical fibers that not only carry and modulate light, but also generate and sense pressure changes. The multifunctional fibers could be used to make various types of sensors. The fibers can also be squeezed in a way that modulates an optical signal, making them promising for "smart" textiles.
DARPA Asks for a Flying Car, Gets a Dual-Rotor Road Warrior Turned HeloBy Clay Dillow
...E um Avião da Boeing, que funciona a Hidrogénio:Just after the new year, DARPA put out a broad agency announcement requesting a flying car, specifically a one-to four-person, vertical takeoff and landing-capable vehicle that can negotiate off-road conditions as well as take to the skies. Today, Fort Worth-based AVX Aircraft has responded with a proposal, releasing some mock-ups of a dual-rotor, ducted-fan driven aircraft that’s also road-ready.
AVX says the four-seater will be able to carry a 1,040-lb. payload 250 miles on a single tank of fuel, peaking at 80 miles per hour over land and 140 miles per hour in the air. It’s coaxial rotor design would certainly satisfy the vertical take-off and landing requirement, and at least the sketches make it look off-road rugged. Unfolding the rotor blades for flight should convert the vehicle from road warrior to aircraft in just one minute.
Of course, sketches are only sketches and it will be interesting to see if AVX can flesh this design out into a practical battlefield vehicle that reliably complies with the written laws of physics and the unwritten practicalities of combat. But as concepts go this one is pretty cool. Feel free to pull the pic above into Photoshop and add the air-to-surface armaments of your choice.
Boeing's Corpulent Hydrogen-Powered Spy Plane Will Fly at 65,000 Feet For Four DaysBy Rebecca Boyle
The future of spycraft looks pretty heavy, if this new Boeing plane is any indication. Adding to today's parade of pretty new planes, Boeing unveiled a hydrogen-powered unmanned aircraft system Monday that will stay aloft at 65,000 feet for four days.
The Phantom Eye is not exactly sleek, but it's one of the greenest aircraft out there -- its only byproduct is water.
The aircraft heralds a potential new market in data and communications collection, Boeing says. Later this summer, it will be shipped from Boeing's Phantom Works facility in St. Louis to NASA's Dryden Flight Research Center for ground and taxi testing. The debut flight will likely take place next year and should last four to eight hours, a mere preview of the aircraft's apparent capabilities.