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quinta-feira, 4 de outubro de 2012

Warp Drive, Tesla, e Papercraft

Warp Drive!
Parece ser só coisa de Ficção Científica, mas vocês estão a ler isto, através da Net, que ninguém sequer imaginou, na Ficção Científica, que eu saiba...
Mas é, agora, uma realidade!

No fundo, a ideia é simples de explicar, nenhum OBJECTO pode ultrapassar a Velociade da Luz, mas o Espaço-Tempo, não tem esses limites... 
Daí, basta cavalgar uma onda de Espaço-Tempo, que o Objecto, em si, não se move(!), só o Epsço-Tempo!

E na NASA, está-se a pensar nisso mesmo...

Warp drive looks more promising than ever in recent NASA studies

Brian Dodson

"Interstellar travel may still be in its infancy, but adulthood is fast approaching, and our descendants will someday see childhood's end." The Starflight Handbook


The first steps towards interstellar travel have been taken, but the stars are very far away. Voyager 1 is about 17 light-hours distant from Earth and is traveling with a velocity of 0.006 percent of light speed, meaning it will take about 17,000 years to travel one light-year. Fortunately, the elusive "warp drive" now appears to be evolving past difficulties with new theoretical advances and a NASA test rig under development to measure artificially generated warping of space-time.
The warp drive broke away from being a wholly fictional concept in 1994, when physicist Miguel Alcubierre suggested that faster-than-light (FTL) travel was possible if you remained still on a flat piece of spacetime inside a warp bubble that was made to move at superluminal velocity. Rather like a magic carpet. The main idea here is that, although no material objects can travel faster than light, there is no known upper speed to the ability of spacetime itself to expand and contract. The only real hint we have is that the minimum velocity of spacetime expansion during the period of cosmological inflation was about 30 million billion times the speed of light.





Tesla! Bobinas Tesla! Palavras para o que? Cá vai mais um Instructable:


Building a Tesla Coil In 9 Easy Steps!

Beachley


With Halloween right around the corner, there's no better time to build your very own Tesla Coil!

Over the past Summer, I built two Tesla Coils. The first one didn't work, so I started building a second one. This instructable will outline the steps I took.







E só para descontrair, eis uma coisa para os nervos, este Origami cúbico, que faz um efeito bestial:

Diamond Window Cube (Modular Origami)

sherrycayheyhey 

Follow these steps to make your very own Diamond Window Cube.

I'm not sure about the origin of these types of cubes (please share if you do) or their real name. I've seen many variations of this but they all involve really weird folding to show the white side of the paper. I figured out how to do what I assume is the classic version of these and they turned out really cute.

I've included pictures of each step for folding the model and also numbered them according to the text I wrote so it should be clear how to make some of these for yourself. I've also labeled the pieces for the assembly step and hopefully that helps too. Happy folding!

http://www.instructables.com/id/Diamond-Window-Cube-Modular-Origami/




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