A saudosa Revista Inventiva!

Eis o número 29 da revista Inventiva, da única Associação que legítimamente representou os Inventores, em Portugal, até à data.

Inventiva Nº 29, Janeiro-Março, 1980

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Uma Bancada de Trabalho...

Quantas Bancadas apareçam nos Instructables, quantas as cá porei...

Fazem SEMPRE falta!

http://www.instructables.com/id/Simple-Workbench

Porreiraço! Rebites para Cartão!

Porreiraço!

Uma boa solução para construír uma data de coisas porreiras, E...

Uma data de Planos com Projectos prá Miudagem!

É bom!

http://www.mrmcgroovys.com/

E este, até fez um Móvel, e SEM rebites!

 http://blogs.myspace.com/index.cfm?fuseaction=blog.view&friendId=318071985&blogId=354113731&__preferredculture=en-US&__ipculture=en-US

Asteróides!

O Asteróide Pallas, vai estrar visível para os telescópios, 524 Km dele...

http://www.space.com/spacewatch/asteroid-pallas-visible-from-earth-100505.html

...E parece que os Mamutes tinham Anti-coagulante no sangue!

Mammoths had more than woolly coats to protect them from the frigid conditions of their sub-zero stomping grounds, scientists have discovered.

The extinct beasts had a form of antifreeze blood that kept their bodies supplied with oxygen in the sub-zero temperatures, according to a study of DNA extracted from 43,000-year-old mammoth remains.

A genetic adaptation in the woolly mammoths' haemoglobin – the molecular cage that carries oxygen in the blood – allowed them to thrive at high latitudes without losing much heat.

http://www.guardian.co.uk/science/2010/may/02/woolly-mammoth-antifreeze-blood



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Isometric Drawing with Inkscape

...How about making your own Instructions, by doing Isometric Drawing,

on Inkscape, or any other Vector Drawing Program?

Here's a Tutorial:

Let's pretend we want to figure this piece, with text, and a hole:

As you want to place the object, you Skew it, with various angles, here, it's -30º;

Then you want to know if your picturing a transparent or opaque piece.

Transparent, you just make all lines visible, but if it's opaque, you just want to see the visible ones.

So Fill the object, 255, 255, 255, (white), in this case.

Remember to put the text in the first, upper layer.

As for the hole, you got to make that part, non-existent, by doing Path>Difference:

And now for some Magic, an operation called Motion.

Here's the thing, with some edges to be worked out, but you have the makings of an Isometric Drawing, here: 

As for how to figure out the values for the object's orientation in space, here's a chart for them:

Here's the angles for a front facing solid:

And, finnaly all other Object orientations:

Notice the wrong lines, on some solids?

You just have to select the "face" that should be up front, and push that face to the top level.



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Espelhos em rolo!

Eis algo para todos os Engenhocas, um espelho que vem em rolo, e estica, numa moldura, com ar quente.

Quando um espelho em vidro não é solução, pelo peso, ou pelo perigo, eis uma alernativa, para além dos espelhos em Acrílico, porque é o mais leve possível:

http://www.rosco.com/uk/propscenic/mirrors.asp#Mirrors

Mas para quem quer mesmo espelhos em Acrílico, aqui vai um Link:

http://www.americanacrylics.com/images/mirrordisplay.gif

Fantástico, maravilhoso... E sei lá mais o quê!!!

Uma molécula encontrada nos OLHOS das aves, reage, pela mecânica quântica, à luz, permitindo às aves VER os campos magnéticos como padrões de cores!!!

Electrons in cryptochrome usually come in pairs, each with an opposite spin like a planet revolving on its axis. But when light strikes the molecule, it can carry one of the electrons away. The presence of a magnetic field can then make each spinning electron wobble like a plate balanced on a stick. When the wayward electron returns to its original molecule, any change it has picked up in its spin sparks a chemical signal that some scientists believe allows birds to see magnetic fields as a pattern of colors.

Read More

http://www.wired.com/wiredscience/2010/04/reverse-engineering-quantum-compass/#ixzz0mxP1G9me

...E atenção, Alentejo, Cabo Verde, e Nordeste do Brasil, Cientistas Suíços conseguiram criar núvens com um Laser!

Geneva, Switzerland--Swiss scientists from the University of Geneva have used a laser both in the lab and in the skies over Berlin, Germany to create clouds, according to a May 2 story in New Scientist from Colin Barras at http://www.newscientist.com/article/dn18848-laser-creates-clouds-over-germany.html?DCMP=OTC-rss&nsref=online-news.

Barras explains that people have experimented with cloud seeding for decades in the hope of boosting rainfall, usually by sprinkling silver iodide crystals into clouds high in the atmosphere. These crystals encourage large water droplets to form around them, and the droplets then fall as rain--in theory, at least. "The efficiency of this technique is controversial," says Jerome Kasparian at the University of Geneva, one member of a research team that think lasers may be a better way to trigger rain on demand.

In the lab the team fired extremely short pulses of infrared laser light into a chamber of water-saturated air at -24°C. Linear clouds could be seen to form in the laser's wake, like a miniature airplane contrail. Kasparian says that the laser pulses generate clouds by stripping electrons from atoms in air, which encourage the formation of hydroxyl radicals. Those convert sulphur and nitrogen dioxides in air into particles that act as seeds to grow water droplets.

http://www.optoiq.com/index/photonics-technologies-applications/lfw-display/lfw-article-display/articles/optoiq2/photonics-technologies/news/applications-__markets/energy-__environment/2010/5/Swiss-scientists-use-a-laser-to-create-clouds-over-Germany.html