Walton sculpture unveiled - 'Apples and Atoms'

Apples and Atoms by Eilis O'Connell (Image: @TCDArtCurator)

A sculpture celebrating the life and work of  Ernest  T.S. Walton, Nobel Laureate for Physics, and former  graduate  and professor at Trinity College Dublin, was opened to the public by Minister for Education and Skills, Ruairí Quinn TD, this week at  a special ceremony at TCD. The sculpture titled ‘Apples and Atoms’   was designed by artist, Eilís O’Connell RHA.

Ernest T. S. Walton studied at Trinity where he was a scholar and won many College prizes, including a gold medal in experimental science. He graduated with joint honours in mathematics and physics in 1926 and went to Cambridge to do his postgraduate work. Thus began the momentous collaboration between Walton and his fellow physicist, John Cockcroft, which exploited linear acceleration methods to induce nuclear disintegration by artificial means, as observed by Ernest Walton, on April 14^th, 1932. It was the first time that Einstein’s E=mc²was verified directly in a nuclear reaction. His and Cockcroft’s success, using artificially accelerated particles for experimenting on the atom, meant the research into the nature and structure of the atom was no longer restricted by having to rely on natural sources of radiation. In 1946, Walton returned to Trinity College, to become the Erasmus Smith Professor of Natural and Experimental Philosophy where he remained until 1985.

“Ireland is home to many science heroes and Ernest T.S. Walton is one of our leading ones. This sculpture pays homage to him as a scientist, teacher and truly celebrates his scientific legacy  that continues to educate and inspire our students of science today, ” said Minister for Education and Skills, Ruairí Quinn.

Ernest TS Walton

Commemorating the 80^th anniversary of the experiment, Trinity invited six artists to submit a design, honouring Ernest T.S. Walton’s research achievements as well as 30 years of dedication to science education. Eilís O’Connell’s design was selected by a panel that included representatives from the Walton family, the School of Physics, the College Art Collections, students and external visual arts professionals.

“The sculpture was commissioned to commemorate Ernest T.S. Walton as a significant figure in the history of the College and in the development of science globally.  It reinforces Trinity’s special connection with him and is an opportunity to honour him as a scientist as well as a champion of science education, an academic and an Irishman,” said Provost of Trinity, Dr Patrick Prendergast.

The sculpture by  Eilis O’Connell is a stack of mirror polished spheres, increasing in size as they rise upward which appear to defy gravity. It is located beside the Fitzgerald Building, home to the School of Physics. Reflected in the stack of spheres are specially planted native Irish apple trees that refer to the private man and his keen interest for growing fruit trees.

“The sculpture pays homage to Walton’s most important characteristics – his intellectual rigour and hands-on ability to physically build the particle accelerator and his nurturing ability as teacher and father.  A man is not defined solely by his academic achievements but also by the memories he leaves behind in others,” explained sculptor, Eilís O’Connell.

Ernest T.S. Walton generously presented his papers to the College Library in 1993; his family subsequently donated his Nobel medal. A small exhibition, which includes the medal, is currently on display in the Long Room, to mark the formal launch of the sculpture.

The commission was made possible by the support of the Walton family, the Provost, the School of Physics, the Trinity College Dublin Association and Trust, the Department of Education and Skills, the Institute of Physics in Ireland, the Fellows and alumni of Trinity and the Science Gallery.

London Calling: The Science of Shuttlecocks

Well, who would have thought Olympic Badminton would get so interesting?

If you're reading this in Ireland, you'll recall the short-lived 'controversy' over the religion of badminton and today we've seen eight female players disqualified over match-fixing scandal. We really should have taken our eyes off the action in the pool and on the beach volleyball arena and kept an eye on the court.

Any badminton I've played myself has been the back-garden or windy-beach variety so I've had the distinct handicap of playing with sub-standard, plastic shuttlecocks (that's the odd device that the players are knocking back and forth). Not good enough to coax out the limited skills even I possess. Perhaps I should have been using the top-of-the-line variety?

The Olympic shuttlecocks are made from 16 goose feathers. Middle of the road shuttlecocks will try and get away with using duck feathers but they generally dry out and crack much more quickly.

According to the laws of the game, controlled by the Badminton World Federation (BWF), the shuttle can be of natural and/or synthetic materials as long as their "flight characteristics generally shall be similar to those produced by a natural feathered shuttle with a cork base covered by a thin layer of leather". Amongst the guidelines are that the feathers should be of uniform length (62-70 mm) and that the device should weigh between 4.74-5.50 grams.

A comparitive study of synthetic versus natural (pdf) shuttlecocks has shown that the natural shuttle had a lower drag coefficient at low speeds compared to a higher drag coefficient at high speed. The synthetic shuttle showed the opposite trend - lower drag at higher speed.

The laws of the game even allow you to test a shuttlecock for speed, in order to ensure that you're dealing with the real thing - slight imperfections in either direction can have significant effects on the flight and behaviour of the shuttlecock in the air.

To test a shuttlecock, one should use "a full underhand stroke which makes contact with the shuttle over the back boundary line". If the shuttle lands between 530 and 990 mm short of the other back boundary line, you can rest easy.

However, a recent study of the trajectory of a shuttlecock in badminton (pdf) has suggested that a more scientific approach can be used to measure shuttlecock speed and that this could be used to "replace the traditional subjective method of the Badminton World Federation based on players’ striking shuttlecocks, as well as applying research findings to improve professional knowledge of badminton player training".

The authors of the study found that the "special structure" of the shuttlecock makes its trajectory "perform unsymmetrical motion when playing". Due to its large surface area, shuttlecocks fall more slowly than expected due to increased drag. Despite this, they showed that the air force drag on the shuttle was proportional to the square of the shuttlecock velocity. This seems to fit in perfectly with what we would expect - the harder you hit the shuttle, the more opposite drag the shuttle experiences.

Enjoy the badminton!

Still confused about the Higgs Boson?

This may or may not help:


The CERN choir, live in CERN control centre.

Improbable Frequency

Science and theatre fans are in for a treat this month with the Irish musical Improbable Frequency making a triumphant return to the Dublin stage from the 13th - 24th March.

Having seen the show in its first run some years ago I can highly recommend it as a piece of brilliant entertainment with a distinct scientific slant.

Rough Magic Theatre Company brings Arthur Riordan's comedy musical (Ireland's only show fitting into that particular genre?) back to Dublin as part of the  City of Science celebrations.

Featuring the Austrian physicist and Nobel Prize winner Erwin Schrödinger and the Dublin Institute for Advanced Studies, the show follows the exploits of a British crossword enthusiast, the wonderfully titled Tristram Faraday, sent to Dublin to investigate suspicious radio broadcasts.

Improbable encounters with English poet John Betjeman, Ewrin Schrödinger, satirist Myles naGopaleen, the mysterious Agent Green and the innocent (or is she?) Philomena O’Shea, lead to plot twists, double crossings and, inevitably, to the Palace Bar.

It's a show that sounds great, will have you genuinely laughing out loud and has loads of scientific references to keep us science geeks happy. It's also visually stunning with a larger set promised for this run. In fact, I'm told the new set it based on a cross section of CERN's Large Hadron Collider!

From this reviewer, the show gets 5/5 stars! Well worth a trip to the theatre.

The show opens on the 13th March. See Gaiety Theatre for more.

+PLUS Skip on over to The Frog Blog where they have tickets to give away!

Faster than the speed of light? No

When physicists announced last September that they had potentially detected neutrinos travelling at faster than the speed of light, it created a massive news story and lots of comment on what this result could mean for science.

Now it seems that after repeating the experiments and looking more closely at the experimental setup, the result could just be an error caused by a faulty connection between a GPS unit and a computer.

Read more in my post for the Cork Independent Blog >>

Happy Birthday Hawking

Former Professor of Mathematics at the University of Cambridge Stephen Hawking celebrates his 70th Birthday today with a rare public lecture which will be streamed online.

The author of several books, including the iconic A Brief History of Time now continues his scientific work as Director of Research at the Institute for Theoretical Cosmology at Cambridge.

Despite having to overcome serious health problems he has become the archetypal scientist of our generation and is regarded as one of the most brilliant theoretical physicists since Albert Einstein.

Hawking will mark his birthday today with a rare public lecture entitled "A Brief History of Mine" at a symposium in his honour at Cambridge. 

The lecture is due to commence at 5.25pm on Sunday January 7th and will be webcast live on the symposium website.

More Hawking goodies:

Professor Hawking answers questions from BBC, Today programme Science Correspondent Tom Feilden to mark his 70th birthday.

Physicists gather at Cambridge to raise a toast to the birthday boy.
Hawking's own website.

Professor Stephen Hawking asks some big questions about our universe>>>

Closer and closer to the Higgs boson

Could this image tell of the elusive Higgs boson?

Scientists have announced that they are tantalisingly close to proving or disproving the existence of one of the fundamental building blocks of the Universe.

Although theoretical physicists have already predicted the existence of the so-called Higgs boson, it has never been observed in experiments - up until now, perhaps.

The Higgs boson is thought to be what gives everything else in the Universe mass and was proposed by a group of scientists, including Peter Higgs, back in 1964. Without the Higgs boson and the 'Higgs Field' which is part of this theoretical model, all the material in the Universe would just be whizzing around at light speed and not clumping together to give us planets, particles, puppies and people. We must have mass for 'stuff' to exist in the Universe as we know it and the theory goes, we must have the Higgs boson to give us that mass.

The Large Hadron Collider is the latest device designed to enable experiments to be conducted which may allow physicists to observe the Higgs boson or to exclude it and to say such a thing does not exist. 

The LHC, is located in a circular tunnel 100 metres beneath the Swiss/French border at Geneva. As its name suggests, it is large (weighing 38,000 tonnes and running in a 27 km loop) and it a collider of hadrons. Hadrons are atomic particles of which a proton is just one example. The protons have a positive charge and can therefore be 'steered' around the LHC using magnetic fields. Once they are moving fast enough, the streams of protons whizzing in either direction can be crossed leading to a collision.

With that highly powerful collision, comes a big shower of debris - particles which are only created at such high energies and the physicists at CERN hope to be able to spot the remnants of the Higgs boson in the aftermath of that collision. It is highly unlikely that the Higgs boson will ever be spotted itself, but it's hoped that as the Higgs particle decays into other particles very quickly, it will leave a tell-tale signature that can be spotted.

The scene at today's announcement

In today's announcement, the scientists were keen to emphasise that while their results are based on lots of data, they are not sufficient to allow them to categorically say one way or the other whether the Higgs boson is a reality. If it does exist, the scientists have now reduced the window in which it will detected.

Through repeated experiments, the physicists have detected some "interesting" results when they looked at the remnants of collisions in the 124-126 GeV (gigaelectronvolts) region. One of the scientists, Fabiola Gianotti said of these discoveries, "This excess may be due to a fluctuation, but it could also be something more interesting. We cannot conclude anything at this stage. We need more study and more data. Given the outstanding performance of the LHC this year, we will not need to wait long for enough data and can look forward to resolving this puzzle in 2012."

Over the coming months, scientists at CERN will continue to focus in on this window, which is getting smaller and smaller, in the hope that they can prove one way or the other, the existence of the Higgs. In many ways today's announcement will be a bit of a disappointment for some observers who expected to hear more definitive news. However, if the news coming from Geneva is anything to go by, it will not be long before we know for sure whether this theoretical particle is the real thing.

This post also appears on the Cork Independent Blog.

C.O.R.Y. gets to work, exploring the skies

CORY (Image: Blackrock Castle Observatory)

After receiving hundreds of entries to their Name the Big Dish competition, Blackrock Castle Observatory have chosen a winner. Drum roll please....

Rebecca Cantwell from Regina Mundi in Douglas, Cork came up with the winning name: C.O.R.Y., which stands for "Computer Operated Radio Yoke".

BCO said in a statement that the name "shows not only Rebecca’s Cork wit but also her knowledge of astronomy and science".

Rebecca joined NASA astronaut Greg Johnson in activating and lighting up CORY last night when it officially began receiving visual and audio signals from space - making it the largest radio dish available for educational purposes in Europe!

The 32 metre dish is based at the National Space Centre, at Elfordstown Earthstation near Midleton in Co. Cork and was originally constructed in 1984 to carry transatlantic telephone calls from Europe to the US. It was retired from this function in the mid 90's when underground cables were laid.

Now, in a partnership between the National Space Centre and Cork Institute of Technology, the dish is being refurbished to act as a state-of-the-art educational and research tool.

Minister for Research and Innovation, Sean Sherlock TD with CORY (Image: Blackrock Castle Observatory)

Dr Niall Smith, Head of Research at CIT, who outlined Phase I and Phase II of the project said that “This project will see a €10m radio telescope brought back to life for less than €10,000 thanks to the partnership between National Space Centre and CIT. It’s a great example of using world-class infrastructure in the most cost-effective way to reach out into the community and to embed our growing scientific heritage alongside our world-renowned culture.

It will excite students in schools who will get to listen in on the radio signals from outer space; it will be a testbed for engineering and science projects from primary through to PhD; it will be available to researchers from across Ireland and beyond; it will be an iconic structure only minutes from the famous Jameson Distillery, which we hope in the future to open to tourists and public alike.”

Phase 1 of the project to refurbish the telescope is now complete and next year it is hoped to see the further refurbishment of the dish allowing it to turn and slew as it originally did, along with the installation of new sensors and receivers.

The dish is capable of detecting a host of cosmic phenomena including:

    the emission of giant slow moving hydrogen clouds
    the violent explosions of stars
    eruptions of the solar surface
    storms on Jupiter
    enormous galaxy-scale jets of quasars

The switch-on ceremony took place as part of Science Week, which continues until next Sunday.

Marie Curie on Google

As well as the death of Alfred Russel Wallace, today is also noteworthy as being the the brithday of Marie Curie- an event celebrated with a Google Doodle. 

A Polish-born French chemist and physicist, she is famous for here work on radioactivity. Amongst her notable achievements:

• Being the first female professor at the University of Paris.

• The first person to recieve two Nobel Prizes - Physics and Chemistry.

• The first woman to win a Nobel Prize.

• Only woman to win in two fields.

• Only person to win in multiple sciences.

Curie coined the term radioactivity, discovered two elements (polonium and radium) and founded the Curie Institute at Paris and Warsaw. She was born on this day in 1867 and died in 1934.

Top Irish Laser Scientist Wins Boyle Medal

Margaret Murnane, Distinguished Professor at the University of Colorado at Boulder, United States, has been awarded the prestigious RDS Irish Times Boyle Medal for Scientific Excellence for her pioneering work which has transformed the field of ultrafast laser and x-ray science.

Inaugurated in 1899, the Boyle Medal continues to recognise scientific research of exceptional merit and since its inception has been awarded to 38 distinguished scientists, including George Johnstone Stoney (1899), John Joly (1911), Garret A. FitzGerald (2005) and Luke O’Neill (2009). In 1999 the awarding of the Boyle Medal became a joint venture between the Royal Dublin Society and The Irish Times. It is now awarded biennially - alternating between a scientist based in Ireland and an Irish scientist based abroad. This year’s award celebrates the work of an Irish researcher working outside of Ireland and carries with it a cash prize of €20,000.

Professor Murnane’s distinguished work has focused on the development of lasers which can operate at the fundamental limits of speed and stability. She designed the first laser able to pulse in the low trillionths of a second range (10 femtoseconds) which allows time almost to be halted to capture a freeze-frame view of the world. She has also developed a tabletop x-ray laser using very short laser pulses to generate coherent beams of x-rays. The output x-ray beam has all the directed properties of a laser - rather than the incoherent, light bulb-like, properties of the x-ray tubes used in science, medicine and security.

Upon hearing the news that she had won, Professor Murnane said “I am deeply grateful to be honoured with this award. I am certain that I would not be where I am today without the love for learning instilled through the strong education I received in Ireland through my primary, secondary and University years. It is undoubtedly this foundation which has given me the confidence to go out and put my stamp on the world. It makes it even more significant for me to learn that I am only the second female Boyle Medal Laureate in the Medal’s history.” Professor Murnane was born in Limerick and is a graduate of University College Cork, where she achieved B.Sc and M.Sc degrees in physics.

Speaking following their deliberations, the 2011 RDS Irish Times Boyle Medal International Judging Panel said that “Margaret Murnane is an international leader in her field and has made a significant contribution to laser and x-ray science. Not only is her fundamental research groundbreaking in itself, the application of her work has the potential to make a significant impact across virtually all scientific and medical disciplines.”

The Panel also noted that Professor Murnane has shared her technology with hundreds of scientists worldwide. A laser built directly from her design was the critical element in the ‘frequency comb’ work for which the 2005 Nobel Prize for Physics was awarded.

The International Judging Panel selected Professor Murnane from a shortlist of five outstanding world-class Irish scientists. The members of the 2011 International Judging Panel included Professor Fulvio Esposito (Chair, Italy); Professor Alexander Borst (Germany); Professor Sir John Enderby (UK); Professor Mary Fowler (UK); Dr Peter Goodfellow (UK); Professor Sir John Pendry (UK) and Professor Dervilla Donnelly (Ireland, Chair of the National Judging Panel).

Professor Murnane will be conferred with her Medal and give a public lecture at the RDS on November 29, 2011. The lecture will be free of charge and open to the general public.

The RDS, founded in 1731, continues to fulfill its commitment to advancing agriculture, arts, industry and science. The awarding of the Boyle Medal for Scientific Excellence is an integral part of the RDS Foundation’s Science programme which aims to support excellence in scientific endeavour and communication, to emphasise the importance of science and technology in economic and social development and to encourage people to see science as provoking, challenging and fun.

For further details about the Boyle Medal and to reserve tickets for Professor Murnane’s public lecture please contact Karen Sheeran on karen.sheeran@rds.ie; 01 240 7289 or  visit www.rds.ie/boylemedal.

Quantum Locking and Hoverboards

Anyone who grew up in the 80's and 90's will be familiar with Marty McFly's 'hoverboard' from Back to the Future II. That's what I was reminded of when I saw this video from an American science fair.

It's an interview and demonstration from researchers at Tel-Aviv University of a phenomenon known as Quantum Levitation or Quantum Locking.

A thin superconducting layer of yttrium barium copper oxide (about 1µm thick) is coated on a sapphire wafer. The magnets on the track then create a magnetic field which penetrates the superconductor when it is cooled below -185 degrees Celsius and causes the disc to float in midair due to what is known as the Meissner effect.
More on the physics of how this works here.

The science is not new, but it's a great demonstration of the powers of superconductors and the potential they may hold for new technologies...perhaps including hoverboards.

Faster than the speed of light?

The OPERA detector

Some interesting results from CERN could turn science on its head IF they are correct. 

The European Organisation for Nuclear Research (CERN) issued a press release yesterday saying that during their OPERA experiment, they had found an "anomaly in flight time of neutrinos from CERN to Gran Sasso".

OPERA was designed to observe a beam of neutrinos travelling from CERN's lab in Geneva to Italy's Gran Sasso laboratory, a distance of about 730 km. Neutrinos are elementary particles that come in three types of "flavours": electron neutrinos, muon neutrinos and tau neutrinos. OPERA aimed to test the phenomenon that, as the particles mover through space, they can change from one flavour to another. The results published now are an unexpected outcome of this work and if they can be confirmed, are startling. The neutrinos got to their destination 60 billionths of a second faster than they should have. Light would have travelled the same distance in 2.4 thousandths of a second. The conclusion: these neutrinos are faster then the speed of light.

CERN scientists were clear, that given the magnitude of the discovery, a very high level of proof is required. Modern physics is largely built on the understanding that the speed of light is the limit past which nothing can pass. Nothing can be faster than the speed of light, according to Einstein's theory of special relativity.

Given the potential far-reaching consequences of such a result, independent measurements are needed before the effect can either be refuted or firmly established. This is why the OPERA collaboration has decided to open the result to broader scrutiny.

“This result comes as a complete surprise,” said OPERA spokesperson, Antonio Ereditato of the University of Bern. “After many months of studies and cross checks we have not found any instrumental effect that could explain the result of the measurement. While OPERA researchers will continue their studies, we are also looking forward to independent measurements to fully assess the nature of this observation.”   

 “When an experiment finds an apparently unbelievable result and can find no artefact of the measurement to account for it, it’s normal procedure to invite broader scrutiny, and this is exactly what the OPERA collaboration is doing, it’s good scientific practice,” said CERN Research Director Sergio Bertolucci. “If this measurement is confirmed, it might change our view of physics, but we need to be sure that there are no other, more mundane, explanations. That will require independent measurements.”

CERN have made the results of the experiment freely available online for other scientists to examine.

CERN will hold a briefing today (Friday 23rd September, 2011) at 3pm (GMT) which will be streamed live at http://webcast.cern.ch/

Weather Forecast is Science Communication in Action

Congrats to Jean Byrne of Met Eireann on winning the European Meteorological Society's 2011 TV Weather Forecast Award.

The win is a credit to the weather service in this country and a fine example of science communication in action. For many people, the weather forecast is their one regular exposure to science.

The award recognises individual contributions to best practise in the communication of meteorology and the fact is, the nightly weather forecast is one of the best science programmes on TV!

The presenter said she was honoured to receive the award:

"It's great, coming as it does from a group of my professional colleagues and which recognises the importance of the work that meteorologists do and how we continue to try to give our best service."

According to Met Eireann, they were invited to nominate an entrant for the competition and a sample of her work was submitted for consideration. This is the first time that an Irish person has been awarded the trophy.

A qualified meteorologist, Jean Byrne is one of a small group of incredibly well known scientists in the country who appear on our screens after the Six-One and Nine O'Clock News. There cannot be a household in the land that has not watched here or one of her colleagues explain why it hasn't stopped raining or why the winter has been so cold.

While other broadcasters are switching to unqualified presenters, RTE are to be credited with keeping these scientists on our screens.

In my view, the contrast between RTE broadcasts and other Irish and British weather forecasts is vast. The meteorologists on RTE make a constant effort to explain WHY the weather is as it is and not just whether it will be dry tomorrow or not. For that, they deserve this prestigious accolade.

All the time in the world

Do you know what time it is? Are you sure?

Scientists from the UK and America have proven that an atomic clock based in the British National Physical Laboratory (NPL) is the most accurate long-term timekeeper in the world.

In a study to be published online today and in the October 2011 issue of the scientific journal Metrologia, the accuracy of the caesium fountain clock, as it is known is confirmed. This is useful, because the clock in question is used to define International Atomic Time (IAT).

Similar clocks are based in labs in the US and Japan and the average is used as the IAT - a concept which is crucial for global communications, satellite navigation, surveying and financial transactions. It is hoped that since the UK atomic clock is now so accurate, similar methods can be used to fine-tune the Japanese and US timepieces.

"The improvements that we report in our paper have reduced significantly the caesium fountain clock's two largest sources of measurement uncertainties - Doppler shifts and the microwave-lensing frequency shift," said NPL Project Leader Krzysztof Szymaniec.

Kurt Gibble of Penn State University who's team contributed to the work explains:
"One of the improvements that our model contributed is an improved understanding of the extremely small Doppler shifts that occur in caesium fountain clocks."

While the acoustic Doppler shift of a train is well known in everyday life and to Leaving Cert physics students, he explained that Doppler shifts for light are too small for people to notice. "If you are walking down the sidewalk while looking at a red traffic light, your eyes cannot perceive the small Doppler shifts resulting from your movement that shift the light toward the blue end of the spectrum," Gibble said. "This change in color is just 1/100 millionth of the difference between red and blue. In the NPL-CSF2 clock, our model now shows that these Doppler shifts are even 100 million times smaller than that."

The other major source of measurement uncertainties - microwave lensing - results from the forces that microwaves in the clock exert on the atoms used to measure the length of a second. "An international agreement on the definition of the second is of fundamental importance in timekeeping," Szymaniec said.

He explained that the length of a second, by international agreement, is the "transition frequency between two ground-state sublevels of a caesium 133 atom." To measure this frequency, caesium fountain clocks probe laser-cooled caesium atoms twice as they travel through the clock's microwave cavity - once on their way up and again on their way down.


Image: The clock, NPL-CsF2, which is located at the National Physical Laboratory in Teddington, U.K. The whole device is approximately 8.2 feet (2.5 m) high. Atoms are tossed up 3.2 feet (1 m), approximately 12 inches (30 cm) above the cavity that is contained inside a vacuum vessel. The large external cylinder screens the atoms inside the clock from the relatively large and unstable external magnetic field. (Credit: National Physical Laboratory, United Kingdom)

Defying Gravity

The labour of rising from the ground, said the artist, will be great, as we see it in the heavier domestic fowls; but, as we mount higher, the earth´s attraction, and the body´s gravity, will be gradually diminished, ´til we shall arrive at a region where the man will float in the air without any tendency to fall: no care will then be necessary, but to move forwards, which the gentlest impulse will effect.
—Samuel Johnson, 1759, The History of Rasselas

Johan Lorbeer in Cork (Image: Irish Independent)

Gravity is the theme for a new exhibition at the Crawford Gallery, Cork which touches on the idea of physics, gravitational forces and even deep space.

The exhibition contains a variety of works from over 50 artists including Dorothy Cross' new work Whale. Cross' is a unique interpretation of gravity, with the skeleton of a whale hung from the fabric of the gallery itself. Located in the Crawford's historic sculpture galleries, it works perfectly with the marbles and plaster-works that surround it.

The exhibition was opened by Minister Jimmy Deenihan on July 15th and runs until 29th October.

The exhibition features a variety of pieces from the collection of the 3rd Earl of Rosse, William Parsons.

William Parson's sketch of the Whirlpool Galaxy

Parsons built the 'Leviathan of Parsonstown' on his estate in County Offaly in the 1840s. The largest telescope of the nineteenth century, the Leviathan was considered a marvelous technical and architectural achievement. He used it to catalogue a number of galaxies including the famous 'Whirlpool Galaxy'.

With spectacular off site installations by Cross and Johan Lorbeer, the exhibition is well worth a visit. It's great to see science and art combining once again in the Crawford - a building  financed by WH Crawford, a man who himself was intrigued by both.

John Tyndall - Science Communicator

Queen Elizabeth II will visit the Tyndall National Institute at University College Cork on Friday, but who was John Tyndall?

The National Institute or 'The Tyndall' as it is generally known was formed in 2004 and brought together several academic departments at UCC, along with the former National Microelectronics Research Centre (NMRC) and researchers at Cork Institute of Technology. The objective was, and is, to act as a focal point for Information and Communications Technology in Ireland and to support industry and academia nationally.

John Tyndall (1820-1893) is one of Ireland's most successful scientists and educators. A draftsman, surveyor, physics professor, mathematician, geologist, atmospheric scientist, public lecturer and mountaineer; his great strength was his ability to communicate science to any audience.

Tyndall was born is Leighlinbridge, County Carlow, the son of a police constable. After a local schooling, he became a draftsman with the equivalent of the modern Ordnance Survey and moved to work in England in 1842.

"The desire to grow intellectually did not forsake me" said Tyndall. "and, when railway work slackened, I accepted in 1847 a post as master in Queenwood College." At the Hampshire boarding school, he became good friends with Edward Frankland and the pair headed to Germany to advance their scientific education.

Tyndall extension under construction 2008

In Germany, the Irishman studied under Robert Bunsen for two years. He returned to England in 1851 and started the bulk of his experimental work. In 1853, after a number of unsuccessful job applications, he became Professor of Natural Philosophy at the Royal Institution in London. Tyndall eventually succeeded Michael Faraday as Superintendent of the Royal Institution in 1867.

He had a variety of scientific interests including solving why the sky is blue: the scattering of light by small particles suspended in the atmosphere. He made the first studies of atmospheric pollution in London and developed the first double beam spectrophotometer.

He demonstrated how light could be sent through a tube of water via multiple internal reflections. He referred to this as the light-pipe and it was a forerunner of the optical fibre used in modern communications technology.

Tyndall was interested in Pasteur's work on sterilisation and developed a process (now known as Tyndallization) which was more effective than Pasteurisation. The process involved heating a substance to 100 degrees C for 15 minutes for three days in a row. The process gets rid of the bacterial spores which are not destroyed by other methods.

Tyndall delivering a public lecture at the Royal Institution

Despite all his scientific breakthroughs, perhaps Tyndall's great legacy is his work as a science communicator. He wrote science columns in many periodicals and gave hundreds of public lectures on a variety of topics. He toured America in 1872 giving public lectures on the subject of light. The substantial proceeds from this lecture tour, he donated to an organisation for promoting science in the US. He published 17 books in his lifetime.

In 1878, it was written of Tyndall: "Professor Tyndall has succeeded not only in original investigation and in teaching science soundly and accurately, but in making it attractive.... When he lectures at the Royal Institution the theatre is crowded".

Tyndall described the vocation of teaching, saying: "I do not know a higher, nobler, and more blessed calling".  He finished one of his books with these inspiring lines:

"Here, my friend, our labours close. It has been a true pleasure to me to have you at my side so long. In the sweat of our brows we have often reached the heights where our work lay, but you have been steadfast and industrious throughout, using in all possible cases your own muscles instead of relying upon mine. Here and there I have stretched an arm and helped you to a ledge, but the work of climbing has been almost exclusively your own. It is thus that I should like to teach you all things; showing you the way to profitable exertion, but leaving the exertion to you.... Our task seems plain enough, but you and I know how often we have had to wrangle resolutely with the facts to bring out their meaning. The work, however, is now done, and you are master of a fragment of that sure and certain knowledge which is founded on the faithful study of nature.... Here then we part. And should we not meet again, the memory of these days will still unite us. Give me your hand. Good bye."

Tyndall had married at the age of 55 and did not have any children with his wife Louisa Hamilton. In his later years, he would often take chloral hydrate to treat insomnia. He died on 4th December 1893 due to an accidental overdose of the drug. He is buried in Haslemere, some 45 miles southwest of London.

Christmas Science 19: Science of Santa Claus

In the run up to Christmas, Communicate Science offers you 20 Christmas Science Facts. We'll post one every day until the 25th December. The following has been posted in many other places before, but its worth reading again...



Science of Santa Claus

How do Santa's reindeer fly?

No known species of reindeer can fly. BUT there are 300,000 species of living organisms yet to be classified, and while most of these are insects and germs, this does not COMPLETELY rule out flying reindeer which only Santa has ever seen.

How does Santa reach everyone?

Santa has 31 hours of Christmas to work with, thanks to the different time zones and the rotation of the earth, assuming he travels east to west (which seems logical). This works out to 822.6 visits per second. This is to say that for each household with good children has 1/1000th of a second to park, hop out of the sleigh, jump down the chimney, fill the stockings, distribute the remaining presents under the tree, eat whatever snacks have been left, get back up the chimney, get back into the sleigh and move on to the next house. Assuming that each of these 91.8 million stops are evenly distributed around the earth (which, of course, we know to be false but for the purposes of our calculations we will accept), we are now talking about .78 miles per household, a total trip of 75½ million miles, not counting stops to do what most of us must do at least once every 31 hours, plus feeding and etc.

This means that Santa’s sleigh is moving at 650 miles per second, 3000 times the speed of sound. For purposes of comparison, the fastest manmade vehicle on earth, the Ulysses space probe, moves at a poky 27.4 miles per second — a conventional reindeer can run, tops, 15 miles per hour.

Einstein and Santa Claus?

Physicist Gaute Einevoll has proposed a novel theory:
"We are talking about moving matter, and no one had more knowledge about matter than Albert Einstein. Do I need to point out that the dishevelled physicist reminds many of Santa Claus? Einstein published his special theory of relativity in 1905 and his general theory of relativity in 1916, but after Coca-Cola more or less defined Santa’s ‘look’ in 1930, Einstein didn’t publish that much more. I have wondered if that’s because Einstein became Santa," speculates Einevoll.

He believes that the reason that Einstein never was able to link together quantum theory and relativity is due to the fact that the famous tussled head was busy in secret helping Santa to become a kind of “Quanta Claus”.

Christmas Science 6: Newton's Birthday

In the run up to Christmas, Communicate Science offers you 20 Christmas Science Facts. We'll post one every day until the 25th December.

Newton's Birthday
One famous scientist who was born on Christmas Day is Sir Isaac Newton.

Newton was an English Physicist, astronomer, mathematician, alchemist and theologian who's book, Philosophiae Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy or more usually called 'Principia')is regarded as the most important scientific book ever written.

As well as outlining his three laws of motion, he also used the text to describe universal gravitation.
newton came in for some criticism after the publication of the book because he described an invisible force able to act over cast distances (gravity), which led to accusations that he was introducing elements of the "occult" into science.

In the second edition of the Principia, Newton used his famous phrase 'Hypotheses non fingo' (Latin for I feign/contrive no hypothesis) to rebuff these criticisms. The full text where he uses this phrase is as follows:
"I have not as yet been able to discover the reason for these properties of gravity from phenomena, and I do not feign hypotheses. For whatever is not deduced from the phenomena must be called a hypothesis; and hypotheses, whether metaphysical or physical, or based on occult qualities, or mechanical, have no place in experimental philosophy. In this philosophy particular propositions are inferred from the phenomena, and afterwards rendered general by induction."

Newton often told a story of how he was inspired to formulate his theory of gravitation when he saw an apple fall from a tree. There is no evidence to suggest that the apple hit him on the head, as depicted in many representations of the discovery since.

The location of the famous apple tree is now disputed. Woolsthorpe Manor, Newton's family home claims to have the tree in its garden, while there is a descendant of the tree in Cambridge and a local school also claims to possess the tree in its garden.

My Secret Life: Flying Snakes...not on a plane

New research out of Virginia Tech. has looked at the dynamics of gliding reptiles or flying snakes!


The snakes can "fly" by flinging themselves off their tree-top perches and gliding to another tree or to the ground.

The researchers looked at Chrysopelea paradisi and recorded their gliding patterns on camera after allowed the researchers to create and analyse 3-D reconstructions fo the animals' gliding patterns during the flight.

The results show that, despite travelling up to 24 metres from their starting point, they never reached an "equilibrium gliding" state but neither did they simple plummet to the ground....contd. here.

My latest guest post for PBS NOVA's Secret Life of Scientists blog is now online. This week's episode features physicist and glider pilot Allan Adams talking about his love of being in the air and condensing the history of the universe into 30 seconds!


You can read the post and watch the episode here.







The Doppler Effect

Today, November 29th, is the birthdate of the Austrian physicist Christian Doppler who was the first to describe how the observed frequency of light and sound waves is affected by the relative motion of the source of the wave and the detector.

Born in 1803, Doppler's work explains why trains (and other vehicles) moving towards us sound different from those which are stationary and those moving away from us. The Doppler Effect, proposed in 1842 is explained by the source of the wave (the train) moving towards the observer so that each successive wavepeak is emitted from a postion closer to the observer than the previous wave.

Therefore, each wave takes a little less time to reach the observer than the previous one.This means the wave peaks are sort of bunched together ahead of the vehicle, giving a higher pitch to he sound. The opposite is true behind the train, the wave peaks move further apart giving a lower pitch to the sound.

Sheldon from "The Big Bang Theory" explains the Doppler Effect: