Blog Posts

quarta-feira, 21 de março de 2012

Novas peças, ver mais, 60 terabites, e um novo Avião Supersónico

Traceparts dá-vos mais peças em 3D, para preverem tudo, no Computador, antes de encomendarem, ou fabricarem:

New catalogs for mechanical designers and engineers

Ver por detrás das paredes? O MIT quer fazer isso...

MIT researchers create camera that can see around corners

By Darren Quick

Fans of the classic 1982 science fiction movie Blade Runner will remember the ESPER machine that allows Deckard to zoom in and see around corners in a two-dimensional photograph. While such technology is still some way off, researchers in MIT’s Media Lab have developed a system using a femtosecond laser that can reproduce low-resolution 3D images of objects that lie outside a camera’s line of sight.
The experimental setup designed by the MIT researchers gained attention last December when video of it capturing a burst of light traveling through a plastic bottle was released. But as amazing as that capability is, it was for the even more amazing ability to literally see around corners that the team says the system was developed.

60 Terabites de Memória num Disco Rígido?
É bom!

Seagate demonstrates HAMR hard drive technology that promises 60 TB HDDs

By Darren Quick

Despite solid state drives increasing in capacity in recent years, the humble platter-based 3.5-inch hard drive still reigns supreme as the data storage device to beat in terms of bits for your buck. But if traditional drives are going to meet user’s ever-increasing data storage demands they will need to improve on the maximum 620 gigabits per square inch storage densities currently possible in platter based 3.5-inch drives. That’s just what Seagate has demonstrated with new technology that has achieved a milestone storage density of 1 terabit per square inch.

From the advent of hard drives in 1956, the magnetic surface of the hard drive platters was divided in sub-micrometer-sized regions called magnetic domains that were oriented horizontally and parallel to the disk surface in what was called longitudinal recording. But around 2005/2006, Perpendicular Magnetic Recording (PMR) was introduced, which changed the orientation to perpendicular to allow for closer magnetic domain spacing and increase data storage capacity.

Para ultrapassar a Barreira do Som, sem problemas, é preciso...
Um Biplano?

Futuristic biplane design eliminates sonic boom

By James Holloway

A throwback to early 20th Century aviation may hold the key to eliminating the sonic boom - at least according to researchers at MIT and Stanford University. Strongly reminiscent of biplanes still in use today, the researcher's concept supersonic aircraft introduces a second wing which it is claimed cancels the shockwaves generated by objects near or beyond the sound barrier.
In fact the idea is not a new one. The idea of a biplane to negate the sonic boom was proposed in the 1930s by aviation pioneer Adolf Busemann, also responsible for the idea of swept-wing aircraft.
Aircraft traveling at supersonic speeds cause shockwaves in the air around them. A first boom is caused by the rapid compression of air at the front of the plane, literally pushed together by the aircraft. A second is caused by the negative pressure left in the plane's wake - or rather, the rapid return to normal pressure that follows soon after. Though the two booms separate phenomena, they occur so close together that they they are usually perceived as a single sound. An aircraft in supersonic flight creates a continual boom as it goes.

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