Monthly Archive for January, 2007

Powerhouse sword exhibits ancient nano technology

In a recent nature article investigating ancient steel manufacturing, the exceptional strength of a Damascus sabre’s steel blade is posited to be due to a banding of carbon nanotubes formed in the initial steel manufacturing process.

A later article in the Australian newspaper talks to Powerhouse curator Des Barrett about a sword we have in our collection, which may be of similarly rare origin – but until now there has been little way of proving this.

Powerhouse "Damascus sabre" 1

But now he hopes that we can look at the nano-structure of the blade and find similar nano-tubes. Such a find may help to prove the age and origin of our sword. Several things about the blade indicate possible connection to the ancient Persian sword smiths. Firstly a Persian inscription (translator required);

The writing on the sword

And secondly a wavy banding on the surface;

The ripples that indicate Damasc Steel

I will keep you posted on the progress of this investigation.

eco Geek

More later, but for now check out ecogeek a blogger who puts up all sorts of very interesting environmental technologies. I was first introduced to the Geek through this article on wooden computers - a great discussion starter.

Careless protest

I received an email before Christmas calling for a national protest on climate change.

I agree that the response to climate change – although taking off – is to little too late, and that we all need to be pushing the Federal Government to take greater steps to protect our future. However the email suggested the following;

Here’s what you do:
From 6pm on December 24th, turn off your electricity and light some festive Christmas candles.

As the different states blackout according to their time-zones, the blackout will roll across Australia.

This is a simple protest and a symbolic action.
As citizens, we can make a difference.

This is a little like driving your car as a protest against road rage. Candles are significantly less efficient than even an incandescent light globe when it comes to providing light, they release more CO2 in creating the light as well as;

A 60 watt light bulb emits about 6 watts of visible light while wasting the remaining 54 watts of electric power as other forms of thermal energy. A candle probably also consumes about 60 watts of chemical energy (the paraffin wax) but emits much less than 3 watts of visible light. The light bulb is clearly not very efficient at converting electric power into visible light but the candle is even less efficient.

I suggest that people make a protest by changing one more incandescent light bulb to a compact fluorescent on Australia Day. In this way their protest will last 10,000 hours. Or maybe organise to take public transport to that Australia Day party rather than drive.

But certainly taking the time to write a letter or email of protest to your local member or the Prime Minister, maybe check out get up and find out the types of action available to you.

Five minutes to midnight

Some time ago (hope is not lost) I referred to the Doomsday clock, where a group of thinkers indicate how close they think humanity is from wiping itself out. At the time of writing that article the clock was at seven minutes to midnight and hadn’t moved in a number of years.

well it has moved again. Last week the decision was made to shift the hands two minutes closer to midnight. so we are five minutes from midnight.

The reasons given for the move were 1. the conflict involving nuclear proliferation, Nth Korea and Iran AND 2. the current issues surrounding climate change.

This is the first time a non political issue has been involved in the movement of the clock.



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