Air Force's X-51 Scramjet Sets Record for Longest Hypersonic Flight
By Tariq Malik
An experimental aircraft has set a new record for the longest hypersonic flight after streaking across the sky Wednesday for more than three minutes while flying at Mach 5 – five times the speed of sound — the United States Air Force has announced.The vehicle, called the X-51A Waverider, dropped from a B-52 Stratofortress mother ship while flying over the Pacific Ocean just off the southern California coast. It successfully ignited an air-breathing scramjet engine than accelerated up to Mach 5, Air Force officials said in the announcement.
http://www.space.com/businesstechnology/x-51a-scramjet-sets-hypersonic-flight-record-100527.html
http://www.space.com/news/rocket-builders-private-robot-landers-100527.htmlTwo California companies, one a rocket engine builder and the other a mock moon lander champion, have teamed up to develop new private unmanned vehicles that NASA could send to the moon, Mars and asteroids.
http://www.spacemart.com/reports/Japanese_team_finds_material_that_could_make_super_disc_999.html
by Staff Writers
Tokyo (AFP) May 24, 2010
A Japanese research team has found a material that could be used to make a low-price super disc with data storage capacity thousands of times greater than a DVD, the lead scientist said Monday. The material transforms from a black-colour metal state that conducts electricity into a brown semiconductor when hit by light, according to Shin-ichi Ohkoshi, chemistry professor at the University of Tokyo.The material, a new crystal form of titanium oxide, can switch back and forth between the metal and semiconductor states at room temperature when exposed to light, creating an effective on-off function for data storage.
It is "promising as a material for a next-generation optical storage device," Ohkoshi told AFP by telephone.
The next chapter in space transportation is being written right now in the State of New Mexico. Forward-thinking pioneers are developing both vertical and horizontal launch vehicles using the power of free-market enterprise.As the world’s first purpose-built commercial spaceport, Spaceport America is designed with the needs of the commercial space business in mind. Unique geographic benefits, striking iconic design, and the tradition of New Mexico space leadership are coming together to create a new way to travel into space.When it comes to outer space, New Mexico is bringing it down to earth!
http://www.cbsnews.com/stories/2010/05/25/tech/main6518049.shtml(AP) Plunging into the waters off Alexandria Tuesday, divers explored the submerged ruins of a palace and temple complex from which Cleopatra ruled, swimming over heaps of limestone blocks hammered into the sea by earthquakes and tsunamis more than 1,600 years ago.
The international team is painstakingly excavating one of the richest underwater archaeological sites in the world and retrieving stunning artifacts from the last dynasty to rule over ancient Egypt before the Roman Empire annexed it in 30 B.C.
Using advanced technology, the team is surveying ancient Alexandria's Royal Quarters, encased deep below the harbor sediment, and confirming the accuracy of descriptions of the city left by Greek geographers and historians more than 2,000 years ago.
http://www.livescience.com/animals/funnel-nosed-fossil-100526.htmlIt's not the mythical kraken, but an ancient creature belonging to the largest, nimblest and probably smartest group of invertebrates has jumped out of the fossil record with a different identity than previously thought. That finding restructures a branch on the evolutionary tree.The tiny mysterious fossil of Nectocaris pteryx — previously described as a shrimp with a chordate tail — is neither a shrimp (an arthropod) nor a chordate (vertebrates and their nearest relatives), but a mollusk, according to a new study detailed in the May 27 issue of the journal Nature.
With the world’s largest inflatable craft being launched inside the Garret Coliseum in Alabama, US, the giant blimps will take to the skies yet again. Christened as Bullet 580, the pioneering aircraft measures 235ft long, 65ft in diameter and is capable to lift 2,000lbs up to 20,000ft in the air. Developed by E-Green Technologies, the aircraft will run on algae fuel, can be remote controlled and flew with the crew as well. Lift to this £5.5million craft is provided by a system of seven bags filled with helium, while the inner hull is full of ambient air. The airship carries the payloads inside the outer envelope of the balloon which is made from a type of Kevlar and is only one sixteenth of an inch thick but 10 times stronger than steel. With its top speed at 80mph, the airship can take off and land vertically. Also, the giant blimp has a magnificent capacity to hover over an area for a week at a time – something neither airplanes nor satellites can manage. The vehicle can effectively be used for the sightseeing and reconnaissance.
Thu May 20, 2:41 PM
Michael Bolen
Yahoo! Canada NewsPhysicists have long wondered why the universe exists when matter and anti-matter particles obliterate each other on contact.
But new data from a particle accelerator in the United States suggests a reason.
The tests showed that when anti-protons and protons collide, the resulting new particles show a one per cent skew toward matter over anti-matter. Over a long period of time, this characteristic of the universe could explain why matter has come to dominate over anti-matter.
Six hundred light-years from Earth, a huge exoplanet circling close to its home star is slowly, inexorably being devoured.WASP 12B orbits just 2 million miles from its star, which means the surface of the planet reaches temperatures over 2,800 Fahrenheit. The sun’s gravitational pull is stronger on the front surface of the planet than on the back, so the planet has been pulled into a football shape. If you were floating on the gaseous planet, and looking heavenward, the sun would take up nearly the entire sky.
Humans have hardy prehistoric fish ancestors to thank for paving the way to their eventual evolution, a new study suggests.About 360 million years ago a mass extinction event hit the reset button on Earth's life, wiping out most of the fish that existed then near the time when the first vertebrates (all animals with backbones) crawled from water towards land. The species fortunate enough to survive set the stage for modern vertebrate biodiversity.
http://www.livescience.com/animals/oldest-marine-fossils-100519.htmlA discovery of a huge number of soft-bodied marine animal fossils is giving these critters a fair shake in the fossil record.Paleontologists found more than 1,500 soft-bodied marine animal fossils, some dating to nearly 500 million years ago. The discovery provides a more complete understanding of marine life at that time and suggests that these soft-bodied sea animals did not die off during a major extinction event during the Cambrian period, as previously thought.
A new class of man-made materials could hold the key to creating X-ray-like cameras that can see through walls and clothing.Called metamaterials, these substances could harness terahertz radiation, light with energies between infrared waves and microwaves. Terahertz waves are essentially low-level heat created by the movement of molecules. They’re largely unexplored as a regime of energy because they are very difficult to detect, but if harnessed could lead to devices with some remarkable abilities.“Terahertz can do things like see through cardboard, styrofoam, or clothes, which is unique compared to infrared, visible, or microwave,” researcher Richard Averitt told Livescience.com.
Retire o s odores desagradáveis da geladeira
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Retire as manchas de água em móveis:
...
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The nano-spider moves along a track comprising stitched-together strands of DNA that is essentially a pre-programmed course.The track exploits DNA's double-helix molecule - a structure of four chemicals that are paired in rungs.By 'unzipping' the DNA you end up with a track that can be used rather like the teeth in a clockwork mechanism. A cog can move around the teeth, provided it meshes with them.By using strands that correspond to sequences in the track, the robot can be made to walk, turn left or right as it is biochemically attracted to the next matching stretch.The spider's 'body' is a common protein called streptavidin. Attached to it are three 'legs' of single-strand enzymatic DNA, which binds to, and then cuts, a particular sequence of DNA. The fourth leg is a strand that anchors the spider to the starting point.
4 COISAS QUE PROVAVELMENTE NÃO SABEM QUE O TELEMÓVEL FAZ
Há algumas coisas que se podem fazer em situações de emergência e o telemóvel pode, na verdade, ser um salva-vidas ou uma ferramenta de sobrevivência. Ora toma bem atenção as estas coisas que se podem fazer com ele:
PRIMEIRO: Emergências
O número internacional das emergências para o telemóvel é o 112. Se te encontrares sem rede numa situação de emergência liga o 112 e o telemóvel vai procurar qualquer rede que se encontre disponível para se ligar ao 112. E o mais engraçado é que esse número pode ser marcado mesmo se o telemóvel estiver bloqueado. Ora experimenta...
SEGUNDO : Trancaste as chaves dentro do carro?
Se o teu carro tiver um comando de abertura de portas, talvez isto te possa ser útil um dia. Aqui está uma óptima razão para se ter um telemóvel : se trancaste o carro com as chaves lá dentro e tens um outro comando do carro em casa, liga para o telemóvel duma pessoa que se encontre em casa, afasta-te cerca de meio metro da porta do carro e pede à pessoa que ligaste para carregar no comando para abrir a porta, mantendo-o
próximo do telemóvel. O teu carro abrir-se-à. E assim poupa-te uma viagem até casa para buscar o outro comando. Neste caso a distância a que te encontras da pessoa a que ligaste não é problema, podes até estar a centenas de km de distância. Agora experimenta!
TERCEIRO :Carga Bateria escondida
Imagina que a bateria do teu telemóvel está em baixo. Para a carregar, digita *3370# e o telemóvel carregará com uma reserva que se encontra escondida e mostrará um aumento em 50% da bateria disponível. Esta reserva carregará automaticamente na próxima vez que carregares o telemóvel.
QUARTO : Como desactivar um telemóvel roubado?
Para obter o número de série do teu telemóvel digita * # 0 6 #. Um código de 15 números aparecerá no ecrã e é único para cada telemóvel. Agora toma nota deste número e guarda-o num sítio seguro. Na eventualidade de o teu telemóvel ser roubado podes ligar para o teu operador, dar este código e pedir que bloqueiem o teu telemóvel. O telemóvel ficará sem utilidade nenhuma mesmo se o ladrão tiver mudado o cartão SIM. Provavelmente não recuperarás o telemóvel roubado mas ficas a saber que quem quer que o enha não poderá utilizar ou vender :)
Fica um tipo de informação que todas as pessoas gostam receber, mas
Mesmo assim vamos ter que experimentar !!!!
Podem copiar, e gravar, ou tirar um script já feito, daqui:
Telling nautilus to open it with wine using the custom command will in fact open it with wine, which bypasses the launcher which requires the executable bit. I just tested it and it worked fine. Of course, some people had other problems with wine, and for some reason assumed it had something to do with the executable bit, and complained it didn't solve their problem even though the executable bit error never appeared.
I also tested my solution, and it doesn't seem to work. I thought I tested it before. Anyway, this is probably a good compromise. A small change to lucid's wine launcher.
#!/bin/bash
# For use with .desktop files and MIME handlers so that the Ubuntu Policy
# can be followed: programs cannot be executed when they lack the execute bit.
# https://wiki.ubuntu.com/SecurityTeam/Policies#Execute-Permission%20Bit%20Required
exe="$1"
shift || true
if [ -n "$exe" ] && [ ! -x "$exe" ] && \
[ "${exe:0:5}" != "/usr/" ] && [ "${exe:0:5}" != "/opt/" ]
then
if [ -n "$DISPLAY" ] && [ -x /usr/bin/zenity ]; then
/usr/bin/zenity --question --title "Warning: $*" --text "The file '$exe' is not marked as executable. If this was downloaded or copied form an untrusted source, it may be dangerous to run. For more details, read about the executable bit. Would you like to execute it?" && exec "$@" "$exe"
else
echo "$*: '$exe' is not executable. Aborting." >&2
fi
exit 1
fi
exec "$@" "$exe"
Create that script in /usr/local/bin/cautious-launcher, then make it executable. You will still get the same executable bit warning, but will be given the option to proceed. Nobody will unknowingly execute an executable with a double-click, but they can easily do so if they wish with only one additional click if they cannot or would rather not change the permissions of the file.
Anónimo disse...
$sudo vi /usr/share/applications/wine.desktop mude a linha "Exec=cautions-laucher %f wine start /unix" por "Exec=wine start /unix %f". e pronto pode usar o wine numa boa! att: haroldo Brasil!
Português inventa bastão com gás-pimenta
Fernando Lopes, de 43 anos, foi premiado com uma medalha de ouro na Feira de Inventos de Genebra, na área da defesa, por ter criado um bastão mais leve, inquebrável e que não deixa tantas marcas no corpo em relação aos que a polícia utiliza hoje em dia. O bastão tem ainda incorporado um spray de gás-pimenta.
"Este novo bastão evita que a polícia provoque tantos danos nas pessoas", assegura Fernando Lopes, explicando as inovações. "O bastão é feito de borracha de impacto, o que amortece a pancada e tem também um amortecedor de impacto que reduz até 30% da força numa estocada evitando, por exemplo, que se parta uma costela com tanta facilidade", explica.O objectivo deste inventor, que já foi premiado por ter criado a "arma de fogo mais segura do Mundo", é "criar meios para as polícias exercerem a sua actividade da melhor forma e sem provocar tantos danos nas pessoas".
