A notebook of useful things

Author: Ivan Debono (Page 5 of 9)

First cosmological results from Planck

I don’t usually post stuff that’s already all over the news media, but the publication of the first results from Planck requires some clarification.

Big, expensive observation missions are put in place with one final aim: to test our model of the Universe. That’s what science is all about.

The results from Planck confirm Lambda CDM (the Condordance Model). Excellent. This increases our confidence in our model. Karl Popper’s “falsifiability” process is a trifle more difficult than good old confidence (used with huge success, and no hang-ups at all, by stock market modellers, but  I digress).

Upshot: we can trust our model.

There is another question though. Can we rule out other models? Now this is what keeps scientists in employment. If our current model were the final word, it would be the end of science (predicted countless times).

The short answer is no. Planck does not rule out models with an evolving dark energy equation of state. Huge sigh of relief all round. We’re not on the dole yet.

It also shows (sorry – “does not rule out the absence of”) stuff that shouldn’t be there with the current model of inflation. So some tweaking required there. The good news in that particular market is that inflation is so poorly understood anyway. So tweaking it won’t cause cataclysmic paradigm shifts.

Bottom line: a splendid job, with excellent results, and a good return on investment.

Planck will probably not give us any teflon-coated frying pans but at €700 million, it’s an absolute bargain, and well worth it.

 

 

 

 

 

The new privateers

It was bound to happen sooner or later. The rising number of pirate attacks on merchant and private vessels in the Indian Ocean has driven the already lucrative private security business seaward. A British company has set up a maritime security company to deter pirate attacks and, it is presumed, to engage in offensive action if extreme circumstances. In other words, a privateering venture.

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The clock is ticking

The Economist has just published an interesting – and frightening – interactive map showing public debt across the world. It calls it the Global Debt Clock.

It makes for uncomfortable viewing. Here’s what it looks like on 4 September 2012 at 2143 GMT.

 

 

 

 

Principia ludorum

Paralympics opens with a big bang 

 

A glowing, celestial sphere descended into the middle of a giant central umbrella structure, igniting the ‘big bang’, of which Hawking has written extensively.

 

The Universe after the Big Bang

Scientists from the Harvard-Smithsonian Center for Astrophysics and the Heidelberg Institute for Theoretical Studies have created an Arepo simulation that has created the most accurate re-enactment of the universe to date.

 

DNA data storage

 

Writing the Book in DNA | Harvard Medical School

Writing the Book in DNA | HMS

 

700 terabtyes of data storage in 1 gram. George Church, the Robert Winthrop Professor of Genetics at Harvard Medical School and a founding core faculty member of the Wyss Institute for Biomedical Engineering at Harvard University, and his team encoded the book, Continue reading

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