Today’s physics news: Friday, 31 July 2010

Michael Gove’s academy plan under fire as scale of demand emerges
Only 153 schools apply to become academies – despite education secretary’s claims that more than 1,000 had done so
Guardian
Independent  

Mars site may hold ‘buried life’
Researchers identify rocks that they say could contain the fossilised remains of life on early Mars.
BBC 
 
Scientists at war over Government funding

An unseemly spat has broken out between two of the most distinguished bodies representing Britain’s scientists and engineers over where the cuts should fall in the forthcoming review of the Government’s science budget.
Independent 
 
‘Straintronics’ debuts in graphene

‘Wonder material’ has yet another wondrous property
Physics World 
 
Satellite quantum communication circles closer
A trick used in 3D-movie theatres could enable totally secure quantum communication with satellites
New Scientist

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Today’s physics news: Thursday, 29 July 2010

Scientists erupt as Browne calls for spending switch towards engineering
Ex-BP chief calls for review of £4bn budget
Financial Times
 
Ignorance lays Parliament open to ‘nonsense debates’
Many MPs do not get involved in science policy because the issues take them “seriously outside their comfort zone”, a senior parliamentarian has admitted.
THE
  
Aurora mission makes detour to moon
A pair of Earth-orbiting satellites designed to study the auroras are making a detour to visit the moon.
New Scientist

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Today’s physics news: Wednesday, 28 July 2010

String theorist Edward Witten gives prize lecture
The king of string theory visited London earlier this month to accept the Newton medal at the Institute of Physics. His full lecture is now online
Guardian 
 
Massive asteroid might hit Earth in 2182, warn scientists
It was first discovered in 1999 and is about 1,837 feet across. If an asteroid of this size hit the Earth it would cause widespread devastation and possible mass extinction.
Daily Mail 
 
First light for Solar Dynamics Observatory
‘Treasure trove’ of data reveals the anatomy and evolution of solar flares.
Nature 
 
Shields up! Force fields could protect Mars missions
Interplanetary adventurers must contend with deadly solar radiation – but the moon’s magnetic memories may hold the key to safe space flight
New Scientist

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Parliamentary push for specialist physics teachers

Parliamentary push for specialist physics teachers whats new in physics

A selection of cross-party MPs has joined the Institute of Physics (IOP) in its aim to ensure all school students in the UK have access to high-quality physics teaching.

After submitting a parliamentary question to the Department for Education and the introduction of an Early Day Motion on the issue of too few specialist physics teachers, IOP is raising the profile among MPs of the severe threat to the health of physics that the shortage poses.

Early Day Motion 467, tabled by Nic Dakin, Julian Huppert and Peter Bottomley, ‘expresses [the House’s] concern at the lack of specialist physics teachers and the consequent drastic drop in the number of entrants to physics A-level, recognises the threat this poses to physics and engineering and therefore to the UK economy, and calls for greater incentives to attract physics graduates into teaching in order to create access to high-quality physics teaching for every child.’

The EDM has attracted 24 MPs’ signatures from Conservative, Liberal Democrat and Labour MPs.

The Minister of State for Schools, Nick Gibb MP, has now responded to a written parliamentary question, submitted by Andrew Smith MP, requesting a commitment to the recruitment of specialist physics teachers.   

In response to a request for a departmental statement on incentives for the recruitment of specialist physics teachers, Nick Gibb accepts “that there is a continuing need to increase the number of physics teachers.”

The answer states, “It is our policy intention to attract more physics and other science graduates into the profession.  We are therefore reviewing the routes into teaching and the incentives offered to well qualified people who want to teach physics or one of the other science disciplines.

“We are considering a scheme to repay the students loans of science and mathematics teachers.  We have also announced plans to double the number of participants in the successful scheme Teach First so that more schools may benefit from the talents of the country’s best graduates.  Three-quarters of Teach First participants teach the most demanding shortage subjects, including science.  Further initiatives will be announced when we are in a position to do so.”

Dr Robert Kirby-Harris, chief executive at IOP, has responded, “We are pleased that the Department recognises the need to recruit more specialist physics teachers.

“However with one in four 11-16 schools in England lacking a specialist physics teacher – a science teacher with expert subject knowledge and enthusiasm for physics – and more than 500 schools not sending any pupils at all on to study A-level physics, a concerted efforts is required and there is no time to wait for future initiatives.

“Of particular concern is whether this Government aspires to the target, set in 2004, of having 35 000 students sit physics A level each year by 2014.  This is a crucial target to meet employer demands and help recover our flagging economy.  The target of 35 000 has been a strong catalyst for action up to now and we sincerely hope this will continue to operate in future.

“Schemes like Teach First are very admirable initiatives, but they are not enough on their own to fill the gaping hole that exists in the science teaching workforce.  Over the last twenty years, we needed 700 new physics teachers a year to maintain numbers.  The figure has been more like 400 -and we now need to aim for 1000 a year to provide young people with the study and career opportunities to which they are entitled.

“There are tried and tested mechanisms that involve, for example, enhancing physics subject knowledge among experienced science teachers who are not physics specialists.  We are keen to work with the Government to make sure programmes are in place to hit the 2014 target.”

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Could physics help to avoid disasters like the Love Parade tragedy?

Could physics help to avoid disasters like the Love Parade tragedy? whats new in physics

As Germany is mourning the death of the victims of the Love Parade mass panic, new strategies to evacuate events will be ever more important in the future.

Andreas Schadschneider, a professor of theoretical physics at Cologne University, tells July’s Physics World readers about a new project that will model people as particles to make evacuation safer.Professor Schadschneider talks about his involvement in Hermes, a new German government-funded project, which aims to protect and save lives by developing an “evacuation assistant”.

Professor Schadschneider is a researcher of crowd dynamics – how people move in large groups. This insight underpins the evacuation assistant’s computer software – the electronic brains of the operation. Combined with information from CCTV cameras, smoke detectors, ticket sales and the building plan, the software could allow stadiums and similar venues to be cleared faster and more safely than is possible now.

To study crowd dynamics, physicists borrow theories from physics that describe how large groups of particles move. An individual person is treated like, for example, a single air or water molecule.

As for particles, two different theories are used to model crowd dynamics. The first takes the approach that we will know what will happen if we know all the forces. (It is “deterministic”.) A particle’s repulsive force when close to another particle is analogous to a person’s need for personal space and the tendency to not get too close to others.

The second model looks at the probability of people’s decisions. (It is “stochastic”.) Since one person may make a different choice to someone else in the exact same situation, or may behave differently themselves depending on their mood, assigning a probability reflects this uncertainty.

The so-called floor-field model takes the stochastic approach one step further by assuming that pedestrians leave a trace or footprint that others have a tendency to follow subconsciously – sort of like ants following a chemical trail, but for humans it is psychological.

The Hermes evacuation assistant will use a combination of both models, and once developed, the system will not only provide data on the distribution of people in a venue and the availability of escape routes, but will also predict how they will leave. It can then provide information in real time to stadium managers who can take appropriate action to ensure that the crowd leaves as quickly and safely as possible.

As Schadschneider explains, “What makes our project so unique is the close co-operation between experimentalists and modellers, and the physics perspective that allows us to identify analogies with physical theories that can be built on and adapted.

“So next time you leave a stadium, or any large and crowded building, rather than dwelling on defeat you could take a moment to imagine yourself as not a person but a particle.”

Also in the July edition:

• When atomic physicist Josh Silver thought of a new technology that could help billions of people in the developing world, he just had to pursue it. Louise Mayor tells the story of Silver’s invention of spectacles that can be self-adjusted to the user’s prescription
• Following headlines hailing the “first synthetic cell”, Richard Jones, a professor of physics at the University of Sheffield, questions just how far we have got towards creating life from scratch
• Research carried out more than 20 years ago in radio astronomy has led to a transformation in how we use the Internet. Radioastronomer John O’Sullivan explains how he and his research team invented the technology behind Wi-Fi

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