Plus Blog

July 28, 2009
Wednesday, July 29, 2009

Dark energy — the debate continues...

As discussed in our recent article Lambda marks the spot — the biggest problem in theoretical physics, dark energy and the cosmological constant remains a controversial area that lies at the very edges of our understanding of the Universe. One of the contributors to that article, Subir Sarkar from the University of Oxford, recently took part in the Big Questions debate series at Imperial College in London, debating the fate of the Universe with Andrew Jaffe from Imperial. Jaffe argued for the existence of dark energy, while Subir argued that it was an artifact of the oversimplified cosmological model used to interpret observations. At the end of the debate, the audience was asked to vote on whether they thought dark energy exists, and Subir told us: "Given that I was attacking the standard cosmological model, it was a pleasant surprise when the audience voted decisively in my favour!"

James Darcy reported on the Big Questions debate in his physicsworld blog, and in a followup post published a clarification from Sarkar on some of the details.

Plus readers, always seeking an informed debate, voted to ask the experts "What is dark energy and dark matter?" in our last IYA09 poll. We'll be recording the answer to that question soon, so stay tuned. And once everyone has had a chance to hear both sides of the argument we'll open the debate on the Plus blog by asking you to vote on whether you think dark energy exists. Will Sarkar win the argument again? We'll have to wait and see..

posted by Plus @ 2:00 PM

1 Comments:

At 11:14 PM, Anonymous Anonymous said...

Labelling something you know almost nothing about always struck me as unhelpful and overly possessive-
man- "how does the mind work?"
scientist- "well it works by using sausageBaffle"
man- "what is sausageBaffle?"
scientist- "we don't know yet, but sausageBaffle is certainly the reason".

 
July 28, 2009

Wednesday, July 29, 2009

It's not very often that something I read makes me want to jack in my lovely job at Plus and return to study and research. But that is just what happened when reading "Sync" by Steven Strogatz.

The book tells the story of how questions from diverse areas — Why do we sleep when we do? How do fireflies flash in unision? Why does our heart beat? How do you link generators in a power grid? — have developed into a new field of study. This new field, which Strogatz calls synchrony, examines how order can spontaneously break out in complex systems. The role of sync in such diverse areas of science is fascinating, but equally fascinating is his evocative description of the process of doing this research. Strogatz describes theoretical concepts and research problems almost as if they were physical entities that you could touch or smell.

Read more...

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July 28, 2009
Wednesday, July 29, 2009

Magic, origami, climate change and stupid equations: maths at the British Science Festival

The 2009 British Science Festival is celebrating creativity, innovation and evolution with a huge range of events over 5 days, from 5 - 10 September at the University of Surrey. And being all those things, Mathematics will be the star of the show, with a fantastic programme of events:

  • The Magic of Computer Science — A clever conjuring show which challenges the audience to work out how the tricks are done. Performed by Peter McOwan, professor of computer science at Queen Mary University of London. (Saturday 5 September)
  • Mathematics and Meltdown: How Financial Systems CollapsePlus author Tim Johnson and Mark Robson answer the questions: How do we model what goes on in the City when the structures are changing so rapidly? And what is the role of statistics in modelling the speculation and high levels of interdependency across markets today? (Saturday 5 September )
  • From Flapping Birds to Space Telescopes: The Modern Science of Origami — Robert Lang, an artist and expert on the mathematics of origami shows how its theorems illuminated long-standing mathematical questions and solved practical engineering problems which even have applications in space. (Sunday 6 September)
  • Why do journalists love stupid equations? — Simon Singh, journalist and documentary maker, asks why the press are suckers for pseudo-mathematical formulas which PR companies cynically use to create quick and easy news stories. (Presidential lecture Sunday 6 September)
  • Chaos in Climate: An Inconvenient Truth? — Being able to make sense of the chaos in weather and climate is one of our greatest triumphs. Ian Roulstone and Lucia Elghali, from the University of Surrey show how mathematical modelling is also helping us to devise strategies for adapting to a changing climate. Tuesday 8 September
  • Fly Me to the Moon — Going back to the moon is the latest focus for space travel. But new mission designs mean sophisticated new mathematical techniques will be needed. Explore with Mark Roberts and Phil Palmer from the University of Surrey. (Thursday 10 September)

For more information about the festival visit www.britishsciencefestival.org or call 0207 019 4947. And you can read more about magic, finance, climate change and space travel on Plus.

posted by Plus @ 1:15 PM

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July 23, 2009
Friday, July 24, 2009

The media is buzzing with swine flu numbers. Latest government figures say that over 100,000 people in England came down with swine flu during the last week — that's almost twice the amount of the previous week, and up to five times higher than the seasonal flu figures recorded last winter. Twenty-six people in England have died of the disease.

But where do the numbers come from? Patients with swine flu symptoms are no longer tested in the lab or traced, so the published figures are estimates, rather than absolute numbers.

Read more...

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posted by Plus @ 11:42 AM

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July 22, 2009
Thursday, July 23, 2009

As part of our celebration of the International Year of Astronomy 2009 we brought you the article Are the constants of nature really constant?, in which John D. Barrow tells us how it all depends on which constants you choose. In the podcast of this interview you can hear how changes in the constants that define our Universe might have implications for extra dimensions, gravity, and climbing flies...

Listen to the podcast.

If this has whetted your appetite for astronomy, then why not take part in our online poll to nominate the next question we'll put to the experts.

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posted by Plus @ 2:21 PM

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July 21, 2009
Wednesday, July 22, 2009

What would you like to know about your Universe — The fourth online poll

This poll is now closed. The most popular question was: "How does gravity work?" You can read the answer on Plus, or listen to the podcast. Thank you for taking part and don't forget to vote in the current poll!

This is the fourth online poll in our series to celebrate the International Year of Astronomy 2009. Choose your favourite question from the list on the right, and we'll put the one that proves most popular to world-leading astronomers and cosmologists, including Astronomer Royal Martin Rees and author and cosmologist John D. Barrow. The poll will remain open for a month and the answer will be published in a Plus article and podcast soon after. If your most burning question is not on this list, then leave a comment on this blog and we'll endeavour to include it in a future poll — there will be three more polls dotted throughout the year.

The most popular questions in the first two polls were What happened before the Big Bang? and Are the constants of nature really constant?. Read the answers by clicking on the links, and discuss them on our blog. The third poll came up with the question "What are dark energy and dark matter?" and we will publish the answer on Plus shortly.

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posted by Plus @ 1:22 PM

1 Comments:

At 9:43 PM, Anonymous Anonymous said...

A topic that I would like covered are the different black holes and how they formed:
- mega black hole
- stella black hole
- micro black hole
- others ....

 
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