All posts by Tom James

Record photovoltaic efficiency

Encouraging advances is solar power technology from the US DoE’s National Renewable Energy Laboratory:

Scientists at the U.S. Department of Energy’s National Renewable Energy Laboratory (NREL) have set a world record in solar cell efficiency with a photovoltaic device that converts 40.8 percent of the light that hits it into electricity. This is the highest confirmed efficiency of any photovoltaic device to date.

But:

The 40.8 percent efficiency was measured under concentrated light of 326 suns. One sun is about the amount of light that typically hits Earth on a sunny day.

Mmm. I wonder what the efficiency will be under normal conditions (once it’s mass produced)? Still, it’s pretty impressive as a proof of concept:

…the new design uses compositions of gallium indium phosphide and gallium indium arsenide to split the solar spectrum into three equal parts that are absorbed by each of the cell’s three junctions for higher potential efficiencies.

Beautiful. Kudos to humanity’s glorious electrical engineers!

[story here via ElectricalEngineer.com and KurzweilAI.net][image from Alex // Berlin on flickr]

Pullman on the futility of censorship

Philip Pullman, celebrated author of His Dark Materials, talks sense on censorship:

The inevitable result of trying to ban something – book, film, play, pop song, whatever – is that far more people want to get hold of it than would ever have done if it were left alone. Why don’t the censors realise this?

Huzzah for human nature then.

He also makes some rather good comments on the nature and extent of religious authority:

Religion, uncontaminated by power, can be the source of a great deal of private solace, artistic inspiration, and moral wisdom. But when it gets its hands on the levers of political or social authority, it goes rotten very quickly indeed.

My basic objection to religion is not that it isn’t true; I like plenty of things that aren’t true. It’s that religion grants its adherents malign, intoxicating and morally corrosive sensations. Destroying intellectual freedom is always evil, but only religion makes doing evil feel quite so good.

I certainly don’t object to religious belief – but I do object to unaccountable power, which is the kind that many religious authorities possess.

[from The Guardian][image from Gullig on flickr]

Black swans and the Fourth Quadrant

Statistician and economist Nassim Nicholas Taleb has written an essay on what he calls the Fourth Quadrant, or the statistical “danger zone”. It’s in depth and I found it technically challenging to understand: but I felt it was well worth it in the end. Seriously, go read it, it makes you feel cleverer. The gist:

Statistics can fool you. In fact it is fooling your government right now. It can even bankrupt the system (let’s face it: use of probabilistic methods for the estimation of risks did just blow up the banking system).

Taleb rails against the misuse of statistical economics that has lead us to our current economics woes. Also check out the various responses to Taleb’s essay by assorted luminaries.

[essay on Edge.org][image from BotheredByBees on flickr]

Nothing says “future” like a big fat airship

As Charles Stross says, “Zeppelins have always been an icon of futurism” and I’ve always wondered why the heck we haven’t gotten over the Hindenburg and moved in to our Bright New Future. The Register gives us the lowdown on all the various engineering problems that need to be overcome for airships to be viable as a mass transport system, and how engineers are trying to solve them:

A Ukrainian airship visionary based in California has won further US military funding to develop his miraculous “Aeroscraft” sky-leviathan design. However, some question marks remain over the craft’s unique – almost miraculous – buoyancy-control technology.

[image from the Register story]

An Internet of things

A world of spime-like networked and sensor-laden appliances, objects, and general stuff took a step closer with an assortment of tech titans announcing their intention to create an Internet Protocol for Smart Objects:

Smart objects are objects in the physical world that – typically with the help of embedded devices – transmit information about their condition or environment (e.g., temperature, light, motion, health status) to locations where the information can be analyzed, correlated with other data and acted upon. Applications range from automated and energy-efficient homes and office buildings, factory equipment maintenance and asset tracking to hospital patient monitoring and safety and compliance assurance.

Suggestions for colloquial names for this technology:

  • The Interject (INTERnet of obJECTs).
  • The Thinweb (a WEB of THINgs).
  • The Stufflink (you get it)

Any more?

As computation and connectivity continue to ooze their way into everything from dildos to doorbells can we think of any interesting science fictional consequences?

[via Slashdot][image from MikeBlogs on flickr]