Royal Society of NSW News & Events

Lecture delivered for the Two Societies Meeting:
"Searching for nanosecond laser pulses from outer space"

Dr Ragbir Bhathal, University of Western Sydney

Tuesday 22 March 2011 at 6 pm

School of Physics, University of Sydney

Meeting report by Dr Frederick Osman 

On Tuesday 22 March 2011, the Australian Institute of Physics and the Royal Society of New South Wales held their annual Two Societies meeting at the University of Sydney and featured Dr Ragbir Bhathal on his topic of searching for very fast light flashes.

 Dr Bhathal opened his talk by saying that we should be searching for nanosecond laser pulse from ETI. He believes that ETI would have surpassed the microwave threshold and gone on to use laser pulses for intergalactic communications. A nanosecond laser pulse has several advantages, he said. Apart from its directivity, a 1015 W or more nanosecond laser pulse would outshine its star by four to seven orders of magnitude. This pulse could thus be easily detected by present day optical telescopes equipped with fast-response PMTs or APDs. Because the telescopes are being used as photon buckets they need not be highly sophisticated. The fact that the National Ignition Facility in the US has been able to generate 1015 W laser pulses although for a few nanoseconds lends credibility to the use of lasers as communication devices by ETI civilisations. The optical search strategy has been used in a dedicated mode only for the last ten years. Four groups, three in United States (Harvard University/Princeton University, University of California and the SETI Institute) and one in Australia (OZ OSETI Project at the University of Western Sydney) have led the charge for the optical search strategy. 

Dr Bhathal's optical search is the longest dedicated optical search in the Southern Hemisphere. Last year a group of Japanese scientists and engineers also joined the optical and microwave searches. However, to date no positive signals in the optical spectrum have been received. Although a laser look alike signal was detected in 2008 by Dr Bhathal emanating from the globular cluster 47 Tucanae it was dismissed after a six month search in the same region failed to detect the signal again. Considered as the father of SETI in Australia, Dr Bhathal hopes to continue the optical search with a new dedicated one-metre telescope which is on the drawing boards at the moment. Dr Bhathal also discussed the latest developments in the microwave search strategy which clocked 50 years last year and other programs which are underway for searching for life in the universe, such as searching for glycine, searching for earth like planets by extra-solar planet scientists and the Kepler mission, the Mars explorations and meteorites. 

Dr Bhathal ended his lecture by quoting from the great 19th century mathematician and physicist Karl Gauss who said that the detection of a signal from ETI "would be greater than the discovery of America". The Australian Institute of Physics and the Royal Society of New South Wales thank Dr Ragbir Bhathal for his outstanding lecture!

Lecture delivered for the Four Societies Meeting:
"Geothermal energy - current state of play and developments"

Dr Stuart McDonnell, Geodynamics Ltd

Mr Stephen de Belle, Granite Power Ltd

Thursday 24 February 2011 at 6 pm

Hamilton Room, Trade & Investment Centre, Industry & Investment NSW, Level 47, MLC Centre, 19 Martin Place, Sydney

Meeting report by Donald Hector 

The annual meeting of the "Four Societies" - the Royal Society of NSW, the Australian Nuclear Association, the Nuclear Engineering Panel of Engineers Australia (Sydney Division), and the Australian Institute of Energy - heard two perspectives on geothermal energy as a major energy source for the generation of electric power. The speakers were Dr Stuart McDonnell, chief operating officer of Geodynamics Ltd and Stephen de Belle, managing director of Granite Power Ltd. Both companies are developing 'hot rocks' technology for the generation of electricity. The technological concept behind this technology is straightforward enough: a source of hot rock, typically granite at temperatures of 150-300 °C at depths between 1500 m and 5000 m below the Earth's surface, is identified. The rock is fractured and water is pumped under high pressure from the surface down through the hot rock where it is heated to very high temperatures. When the water returns to the surface, the energy is used to drive turbines which in turn generate electricity. The thermal resources in Australia are huge­- in the Cooper Basin alone, there are hot rock deposits capable of generating as much electricity as burning 750 million tonnes of coal or 16 trillion cubic feet of natural gas. 

Of course, the devil is in the detail. It is technologically challenging and expensive to drill to these depths. In addition, there are other significant technological challenges that need to be resolved such as fluid chemistry when the hot water reacts with the minerals in the rock and the components in the system, the ability to manage multiple fracture-zones in order to extract the maximum amount of heat, the gradual reduction of the temperature of the resource over time, and the challenges in creating viable, efficient heat exchanger designs in rock several kilometres beneath the Earth's surface. 

If these technological and economic issues can be overcome, geothermal generation is well placed to provide a substantial proportion of Australia's baseload electricity demand. This could be as high as 2,300 MW of base-load capacity by 2020. Some government and private funding has already been committed with the intention to seek further capital from institutional investors during 2011.

"Belief in science"

Professor John White CMG FAA FRS, Australian National University

Friday 26 November 2010 at 5.30 pm

Lecture Theatre 1, Merewether Building, University of Sydney

The achievements of science in the last 400 years have been of great benefit to humanity and are appreciated widely. Less well understood is how personal attributes of awareness, excitement, frustration and recognition of beauty are central to successful science. These very human qualities play a role in making discoveries. Scientists' optimism, suspended disbelief, and a reliance on empiricism are as much part of the scientific method as clear logic. Science requires absolute honesty and care about conclusions to be believable. Science is not autonomous and the sometimes necessarily tentative opinions are often incomprehensible and even unacceptable to the public – we must do better in explaining! Professor White's lecture will also examine some of his recent work on the structure and function of industrially valuable explosive emulsions – understood by the novel neutron scattering methods of 'contrast variation' pioneered in his research.

John White is currently Professor of Physical and Theoretical Chemistry at the Research School of Chemistry at the Australian National University. Graduating from Sydney University, he went to Oxford University on an 1851 scholarship in 1959. He became a Research Fellow of Lincoln College before finishing his DPhil and an official Fellow of St John's College Oxford in 1963. He is one of the discoverers of isotopic contrast variation in neutron scattering – which is currently used worldwide for understanding the structure of "soft matter".

"Powering the US grid from solar and wind"

Dr David Mills, co-founder of Ausra, Inc.

Wednesday 3 November 2010 at 7 pm

Conference Room 1, Darlington Centre, University of Sydney

Solar and wind are our two largest energy resources and are well distributed globally. In these respects, they are ideal to re-power humanity with little climate or political impact. Some say that such a strategy is not practical because the solar resource disappears at night and each wind generator can be highly variable in output. However, the impact of already commercially available solar thermal storage technology, together with the overlap effects of wind energy from many sites may prove otherwise.

The first example used is the USA 2006 electrical load calculated on an hourly basis from government data and the second is a total energy supply scenario. A high voltage DC grid backbone (commercially available today) is assumed to allow full access of delivered power to all parts of the country. National wind and solar output are calculated hourly using government resource data. The initial results of the analysis are presented together with a discussion of the roles of solar and wind in such a new system, in comparison to conventional baseload/peaking thinking.

The talk will begin with an update of Dr Mills' company's activities in the United States since his leaving Sydney in early 2007, followed by an update of today's solar technology. The main part of the talk describes private work in progress by the author and his colleagues in the United States to take a first look at the feasibility of powering the United States energy system entirely from wind and sun by mid-century.

Dr Mills is the former Head of the Solar Energy Group at the University of Sydney and past President of the International Solar Energy Society. He is the co-founder and former chairman of the SHP and Ausra companies.

"Is the climate right for nuclear power?"

Dr Ziggy Switkowski, Chair of the Australian Nuclear Science and Technology Organization

Wednesday 6 October 2010 at 7 pm

Conference Room 1, Darlington Centre, University of Sydney

The world is experiencing a strong warming trend believed to be driven by greenhouse gas emissions associated with the burning of fossil fuels for energy production. Australia's demand for electricity, and energy in general, is expected to double by 2050. The challenge is to moderate and meet this growing demand in an environmentally responsible way. Nuclear power is already widely used around the world and the debate for its deployment in Australia is well under way.

This presentation will review the nuclear fuel cycle in the context of low emission energy technology and point to the potential role of nuclear power in Australia's energy and climate change strategy.

Dr Ziggy Switkowski is the Chair of the Australian Nuclear Science and Technology Organization. He is also a non-executive director of Suncorp, Tabcorp and Healthscope, and Chair of Opera Australia. He is a former chief executive of Telstra, Optus and Kodak (Australia).

In 2006 he chaired the Prime Minister's Review of Uranium Mining, Processing and Nuclear Energy which returned nuclear power to the country's strategic debate. He has a PhD in nuclear physics from the University of Melbourne and is a Fellow of the Australian Academy of Technological Sciences and Engineering.

"Long-term changes in solar activity – including the current Grand Minimum"

Ken McCracken, Jellore Technologies and Senior Research Associate, University of Maryland

Wednesday 1 September 2010 at 7 pm
Conference Room 1, Darlington Centre, University of Sydney

The sunspot record since Galileo's time, and the cosmogenic nuclides ¹⁰Be (in ice cores) and ¹⁴C (in tree rings) show that the degree of activity of the Sun has varied greatly over time. The solar activity, manifested by the occurrence of sunspots, solar flares, and coronal mass ejections may be quite high, as it has been since 1946; and was during Roman times, or very small as during the Maunder Minimum (1645-1715); the Dalton Minimum (1810-20) or the Gleissberg Minimum of 1900-10. In the first part of the lecture, the speaker will discuss his recent studies with Swiss colleagues of the last 10,000 years of ¹⁰Be data from the Arctic and Antarctic that shows that the Sun has exhibited a number of persistent periodicities in solar activity, the most important being of duration 2300yr, 210yr, ~85yr, and the well known 11/22 year solar cycle. He will also outline the last 30 years of satellite data that show that the solar irradiance varies by ~0.1% over the 11 year solar cycle.

Against that background, he will then describe the substantial reduction in solar activity that commenced in 2006. Since then, the sunspot behaviour has been similar to that during the Dalton minimum (1810-20). The interplanetary magnetic fields have been lower than at any time during the space age, and the cosmic radiation intensities are well above those at any time during the past 60 years. The solar irradiance has decreased well below that observed in the previous 30 years. The evidence indicates that the magnetic properties of the Sun are now very different from those at any time in the "Space Age". Based on the 10,000 year ¹⁰Be record, he will speculate that the Sun will remain relatively inactive (and cool) for the next 20 years, and it will then resume a steadily increasing state of activity until it reaches a peak of the Hallstatt (2300 year) cycle ~200 years in the future.

Ken McCracken has had a long and varied life as a scientist, technologist, and contrarian. Starting his research career in Tasmania and New Guinea in the 1950s, he was then deeply involved in the early days of the US space program for seven years while at the Massachusetts Institute of Technology and the University of Texas. He designed and built scientific instruments that were flown on seven spacecraft that went to the orbits of Mars and Venus in the 1960s to provide the information needed to protect the US astronauts from being killed, or losing their virility, en route to the Moon. Following a professorship at the University of Adelaide, CSIRO appointed him to inaugurate a new research laboratory to improve geophysical exploration for minerals in the harsh Australian environment. Moving to the Southern Highlands in 1989, he operated a consultancy providing scientific advice to the mining industry. Over the past decade he and his Swiss, US, and Australian colleagues have used results from ice cores from Greenland and Antarctica to understand how the Sun has waxed and waned in activity over the past 10,000 years, and how this has paralleled the twenty two little ice ages, and many warming periods in the Earth's climate over the past 10,000 years. With his wife Gillian, he owns and operates the 850 acre beef breeding property "Jellore" in High Range.

"The dynamic brain: modeling sleep, wake, and activity in the working brain"

Professor Peter Robinson, University of Sydney

Wednesday 4 August 2010 at 7 pm

Conference Room 1, Darlington Centre, University of Sydney

The brain's activity varies around the clock in response to stimuli, light inputs, and the buildup and clearance of sleep-promoting chemicals - somnogens. Signatures of brain activity have been observed for over a century and are widely used to probe brain function and disorders, often via the electroencephalogram (EEG) recorded by electrodes on the scalp, or through functional magnetic resonance imaging (fMRI), which measures a combination of blood volume and deoxygenation. Here, a quantitative physiologically based model of the working brain is described that responds correctly to the day-night cycle, somnogens, caffeine and pharmaceuticals, and generates activity in the cortex consistent with brain imaging measurements. Successful applications to numerous experiments are described, including EEGs, seizures, sleep deprivation and recovery, fatigue, and shift work. Aside from its scientific uses, this working brain model is currently finding clinical and industrial applications to brain function measurement and to prediction and monitoring of alertness.

Peter Robinson received his PhD in theoretical physics from the University of Sydney in 1987, then held a postdoc at the University of Colorado at Boulder until 1990. He then returned to Australia, joining the permanent staff of the School of Physics at the University of Sydney in 1994, and obtaining a chair in 2000. He is currently an Australian Research Council Federation Fellow working on topics including sleep, brain dynamics, space physics, plasma theory, and wave dynamics.

"Pluto and the uber-nerds"

Fred Watson, Anglo-Australian Observatory at Coonabarabran

Wednesday 7 July 2010 at 7 pm

Conference Room 1, Darlington Centre, University of Sydney

When is a planet not a planet? When it's a dwarf-planet, perhaps? So what's the difference? In 2006, astronomy's governing body, the International Astronomical Union, wrestled with this very question at their General Assembly in Prague. Before we knew it, media all around the world had declared that Pluto had been "dumped" from its status as the ninth planet, hinting that it had been unfairly thrown out of the Solar System. And in 2008 things got worse, with Pluto joining the lowly ranks of a new class of objects with the unflattering name of Plutoids. In this entertaining and fully illustrated journey through Pluto's eventful history, Fred Watson debates whether pragmatism and good science should prevail over sentiment and tradition.

Fred Watson says he has spent so many years working in large telescope domes that he has started to look like one. He is Astronomer in Charge of the Anglo-Australian Observatory at Coonabarabran, where his main scientific interest is gathering information on very large numbers of stars and galaxies. He is also an adjunct professor at the Queensland University of Technology, the University of Southern Queensland, and James Cook University. Fred is the author of "Stargazer: The Life and Times of the Telescope", and is a regular broadcaster on ABC radio. His new book "Why is Uranus upside down?" is based on listener questions, and was published in October 2007 and won the 2008 Queensland Premier's Literary Prize for Science Writing. In 2003, Fred received the David Allen Prize for communicating astronomy to the public, and in 2006 was the winner of the Australian Government Eureka Prize for Promoting Understanding of Science. Fred has an asteroid named after him (5691 Fredwatson), but says that if it hits the Earth it won't be his fault ...

"Science for gentlemen - the Royal Society of New South Wales in the nineteenth century"

Peter J. Tyler, Historian for the Royal Society of New South Wales

Wednesday 2 June 2010 at 7 pm

Conference Room 1, Darlington Centre, University of Sydney

Scientific activity in New South Wales began when James Cook and Joseph Banks voyaged along the eastern coast in 1770. This was the Age of Reason, when educated men challenged traditional knowledge handed down from antiquity and the Bible. Curiosity about natural history had become a fashionable pursuit when the penal settlement at Sydney Cove was established in 1788. Settlers and colonial officials collected and classified the animal, vegetable and mineral constituents of their unfamiliar environment. Even some of the convicts found a profitable sideline collecting shells, birds, plants, and aboriginal artefacts for sale to visiting ships' captains, who in turn sold them for high prices to wealthy collectors in Britain and the Continent.

In June 1821, towards the end of Lachlan Macquarie's term as Governor, seven men formed the grandly named Philosophical Society of Australasia "with a view to inquiring into the various branches of physical science of this vast continent and its adjacent regions." Although it only survived for a little over a year, this was a predecessor of the present Royal Society of New South Wales.

During the nineteenth century the Royal Society and its three antecedents functioned as an exclusive club for men "of honourable reputations" interested in the natural sciences. Almost without exception the members were pastoralists, merchants, or professionals such as clergymen, lawyers or medical practitioners. They classed themselves as gentlemen, because they were not engaged in physical labour. Only a handful were what we would now call scientists, because separate disciplines were only beginning to emerge, and career opportunities were few.

This does not mean that science was merely a hobby, or a part-time diversion. Members read the latest overseas journals diligently, they collected specimens and published papers - often descriptive rather than analytical - and they engaged in vigorous discourse on many of the contentious issues of the period, including Darwin's theories of species evolution at a time when such views were deeply unpopular in Australia. A few conducted original research in fields such as astronomy, geology and aeronautics.

Members of the Royal Society were part of the colonial conservative establishment. Women were excluded, while rigorous admission procedures ensured that "working men" did not become members. Nevertheless, the Royal Society recognised the need to educate or inform the broader public about the achievements of science, and organised regular gatherings for that purpose. It would be easy to characterise the members as typical class-conscious paternalists of the Victorian era, but there were always a few dissenters who did not fit that model.

In the twentieth century more inclusive attitudes emerged gradually, reflecting the changes in the wider community. Today it is difficult to discern any remnants of the earlier caste system. A question we might ponder is - has the influence and public profile of the Royal Society diminished at the same time?

Peter J. Tyler is the Historian for the Royal Society of New South Wales. In 2008-2009 he was the inaugural Merewether Research Scholar at the Mitchell Library. Peter has a BA degree in geography and a Master's degree in history from the University of New England. His PhD thesis from that institution examined the role of the Board of Health in public health administration in NSW from 1881-1973. He also holds a Graduate Diploma in Adult Education from UTS. Previously he worked in management positions in the public, private, and not-for-profit sectors, including fifteen years as Secretary and chief executive of the Workers' Educational Association in Sydney. His published books range over such diverse fields as health care, the building industry, and the public service. Peter Tyler has been President of the NSW Branch of the Australian and New Zealand Society of the History of Medicine, and of the Professional Historians Association (NSW).

by Donald Hector

The middle of the 19th century was a time of great change in NSW. Responsible government was introduced in 1856 and full manhood suffrage followed two years later. Queensland separated from NSW a year after that. And just 10 years after the introduction of responsible government, Queen Victoria granted Royal Assent to the title of The Royal Society of New South Wales. However, as Dr Peter Tyler, the Society's Historian, explained in his lecture at the 1181st ordinary general meeting on 2 June 2010, The Royal Society of NSW traces its origins back to 1821 when The Philosophical Society of Australasia was formed. There were several early attempts to form such societies with mixed success but this should not understate the commitment of a group of progressives who wanted to see the natural history, agriculture, and culture of the nascent colony flourish.

The Philosophical Society of Australasia was established under patronage of the Governor, Sir Thomas Brisbane and he also became its first President. The founding members included Major Goulburn (the Colonial Secretary) and Edward Wollstonecraft a wealthy merchant and landowner at North Sydney. The purpose was to study the physical sciences and the mineralogy of NSW (which then, of course, included what is now Queensland and Victoria). The early Society only lasted a year or so but there were other attempts to stimulate more intellectual activities in the colony in the first part of the 19th century. The first subscription library was started by Wollstonecraft in 1826 and between 1820 and 1850 other societies began, such as the Agricultural Society (which lapsed for some years and then was re-established in the 1850s), The Australian Society for the Encouragement of Arts, Science, Commerce, and Agriculture (more commonly referred to as the Australian Philosophical Society) but, like the early Philosophical Society, these early groups generally did not thrive.

But by the 1860s, with Sydney having been formally declared a city (in 1842), NSW having been granted responsible government, and the buoyant economic growth of the period created an environment where interest in science, art, and literature blossomed. The University of Sydney was founded in 1854 and the time was right for a successful society to be established.

Just six years after the granting of Queen Victoria's Royal Assent there were 122 members of the Society across a range of occupations - pastoralists, businessman, scientists, artists, lawyers, and the clergy - and by the 1890s there were nearly 500 members. In the latter half of the 19th century a number of eminent scientists (Prof John Smith (physics and medicine), Prof Archibald Liversidge (geology and chemistry), Sir Thomas Anderson Stuart (physiology) were but a few). The Society's transactions were published in a prestigious peer-reviewed journal (which continues today) and attracted publications from such eminent scientists and engineers as Lawrence Hargrave.

The first 80 years of the Society were colourful, strongly influenced by the personalities of the time when NSW was finding its feet as a society. Dr Tyler's work was made possible through his appointment as the inaugural Merewether Scholar of the State Library of NSW.

"The weird world of nanoscale gold"

Mike Cortie, Director of the Institute for Nanoscale Technology, University of Technology, Sydney

Wednesday 5 May 2010 at 7 pm

Conference Room 1, Darlington Centre, University of Sydney

Mike Cortie is the Director of the Institute for Nanoscale Technology at the University of Technology, Sydney (UTS), in Australia. He was born and educated in South Africa. He has a BSc(Eng) degree in Physical Metallurgy, a Masters degree earned from research on the corrosion of zirconium and a PhD degree, which was focused on metal fatigue and awarded in 1987. After a stint at South Africa's Atomic Energy Corporation and at Pylon Engineering, a gear-cutting works, Mike joined Mintek, a minerals and metals research organisation. Mike headed the Physical Metallurgy Division of Mintek between 1997 and 2002. The Division consults widely to South African and international industry and now generates the major portion of its funds from foreign contract research. He relocated to Australia and joined UTS in July 2

Mike's current research interest is nanotechnology, and in particular the applications of precious metals in nanotechnology. Previous research activities included research on ferritic and nickel-substituted stainless steels, on intermetallic compounds with the C1 (CF12) and B2/L21 crystal structures, on X-ray diffraction and crystallographic texture of bcc and fcc alloys, on cellular automata and the simulation of metal solidification, cracking and solid state transformations, on explosive interactions between molten metal and water, on displacive transformations in Pt-containing alloys and compounds, on the phase relationships in the Al-Au-Cu ternary system, and on the crystal structures of the martensite phase formed by displacive phase transformation in the b Au-Al-Cu shape memory alloy. He has also been active outside the materials arena, and has made contributions to the mathematical modelling and graphics rendering of mollusc shells, and the science education of children.

"The real significance of hobbits: hominid biogeography in South East Asia"

Professor Michael J. Morwood, Professor in Archaeology, School of Earth and Environmental Studies, University of Wollongong

Wednesday 4 November 2009 at 7 pm

Conference Room 1, Darlington Centre, University of Sydney

In 2004 Professor Mike Morwood led the team that found the skeleton of a previously undiscovered human species on the island of Flores. The 'hobbit' skeleton was of a much smaller stature than present-day humans, being that of an adult who was only one metre in height. Evidence suggests that these 'hobbits' may have lived from 95,000 to 13,000 years ago and were probably descendants of the Homo erectus population that had evolved in isolation on Flores. It is believed that the 'hobbit' may have still been in existence when the 16th century Dutch traders arrived at the island. This discovery has raised questions about the nature of human of evolution.

The discovery of an endemic species of human on Flores was unexpected, but no more so than finding evidence of Homins on the islands from 880,000 years ago. This lecture will explain why the 2004 discovery was not wholly unexpected with reference to the faunal biogeography of South East Asia. It will conclude with some of the implications for early hominin and modern human dispersal mechanisms, and for the future archaeological research in the region.

The speaker's presentation can be found here: Mike Morwood's Talk (5 MB PDF).

Professor Michael Morwood has carried out extensive research in New Zealand and throughout Queensland, New South Wales and the Northern Territory, both as an academic researcher and as a public archaeologist. He is particularly interested in ethnohistory, material culture studies and the social-ceremonial role of art in Aboriginal Culture.

In 2007, Professor Morwood and Penny Van Oosterzee won the John Mulvaney Book Award for the publication of "The Discovery of the Hobbit: The Scientific Breakthrough that Changed the Face of Human History" documenting his work on the Indonesian island of Flores. In addition to his work in Indonesia, he is an expert in Australian Aboriginal rock art and the author of "Visions from the Past: The Archaeology of Australian Aboriginal Art".

"Climate change through the lens of the geological record: the example of sea level"

Professor Kurt Lambeck, AO FAA FRS
Distinguished Professor of Geophysics, Australian National University
President of the Australian Academy of Science

Friday 30 October 2009 at 5.30 pm
Eastern Avenue Auditorium, University of Sydney

The 2009 Clarke Memorial Lecture is presented in conjunction with The University of Sydney and The Geological Society of Australia

Climate change has been with the planet since the time of the formation of the oceans and atmosphere and is recorded, albeit imperfectly, in the geological record. One of these records is the change in sea level through time, a complex variable that contains implicit information not only on climate but also on the tectonic and geological evolution of the planet. He will address aspects of the underpinning science and what we can learn from it, focussing on the best-known part of the record, that for the last glacial cycle.

The modern instrumental record is much more precise and has higher resolution but will also contain in addition to the 'natural' variability any new signals that may result from human impact on climate. The challenge is to separate these 'natural' and 'anthropogenic' forcings if forecasts of future change are to be meaningful.

The problems encountered are similar to all other indicators of climate change – of separating natural and human forcing from instrumental and geological or historical records when the length of the latter are about the same as the time that human impacts may have been effective.

Professor Lambeck will use the sea level record as an illustration of many of the issues that need to be understood for a meaningful interpretation of the evidence. In so doing he will raise the role of the IPCC and where the IPCC findings are tracking in 2009; and how the public debate on climate change appears to be becoming increasingly confused while the underpinning science is becoming more robust.

The speaker's presentation can be found here: Kurt Lambeck's Clarke Lecture (2.9 MB PDF).

Professor Lambeck has been at the Australian National University since 1977, including ten years as Director of the Research School of Earth Sciences. Before that he was at the University of Paris and the French Space Agency (1970-1977), and at the Harvard-Smithsonian observatory (1967-1970). His doctorate is from Oxford (1967) and his first degree from the University of New South Wales (1963). He was elected to the Australian Academy of Science in 1984 and became its President in 2006.

He is a Fellow of the Royal Society (1994), and a foreign member of the Royal Netherlands Academy of Arts and Sciences (1993), the Norwegian Academy of Science and Letters (1994), Academia Europaea (1999), the Académie des Sciences, Institut de France (2005), and the US National Academy of Sciences (2009)

"The SKAMP project - a telescope reborn to look back in time"

Professor Anne Green
Head, School of Physics, University of Sydney

Wednesday 7 October 2009 at 7 pm
Conference Room 1, Darlington Centre, University of Sydney

The speaker's presentation can be found here: Anne Green's Talk (3.6 MB PDF).

"Weird animal genomes and sex"

Professor Jenny Graves, Head, Comparative Genomics Research Group, Australian National University
Director, ARC Centre of Excellence for Kangaroo Genomics
Professorial Fellow, Department of Zoology, University of Melbourne

Wednesday 2 September 2009 at 7 pm
Conference Room 1, Darlington Centre, University of Sydney

The speaker's presentation can be found here: Jenny Graves Talk (25 MB PDF).

In the 1970s, Jenny stumbled on the potential of Australia's unique fauna (mammals, birds, and reptiles) to study genetic structures and regulation systems conserved from the earliest vertebrates through to humans. By exploiting the genetic diversity of Australia's unique mammals, her group have gained insights into mammalian sex, development, genetic disease, defence mechanisms, and species survival. Her lab's unique contributions to understanding the evolution, function and organization of the mammalian genome have had major impacts on current thinking in the field.

Jenny has been an enthusiastic advocate for comparative genomics. She set up and directs the ARC Centre of Excellence for Kangaroo Genomics, which has secured a key role for Australia in the sequencing and analysis of the kangaroo genome. Her contributions to science have been recognized by election to the Australian Academy of Science in 1999, a Centenary Medal in 2002 and the Macfarlane Burnet Medal in 2005. She is a 2006 Laureate of the L'Oréal-UNESCO Awards For Women in Science.

Research projects

Our group (Comparative Genomics) is famous for studying genes and chromosomes of Australian animals. Every project depends ultimately on samples from a variety of Australian animals such as kangaroos and platypus, but also exotics like devils (Tasmanian) and dragons (lizards). Pat is a whiz at organizing legalities and technicalities, as well as animal handling and sampling; Jenny would really prefer to work on tomatoes or fruitflies. We culture tiny samples of skin cells in the laboratory. Jenny's training in cell culture at Berkeley was used to establish methods for growing just about anything, and Pat now runs our unique cell culture lab with exacting standards. Our stock in-trade is physical mapping of genes onto chromosomes, and getting brilliant chromosome preparations is crucial; here Pat's training in human cytogenetics complements Jenny's training in molecular cytology.

We use these basic techniques more and more for large-scale projects on the genomes of Australian mammals. Basic work had to be done to characterize the chromosomes of the kangaroo and the platypus before the complete sequence of their genomes (costing many millions of dollars) could be interpreted. Platypus chromosomes caused major headaches because they have weird multiple sex chromosomes: Jenny had been trying to sort them out for 20 years, now an onslaught using new molecular techniques allowed Jenny and Pat, with a postdoc and research assistant, to sort out which chromosome is which.

Two major projects last year that Pat and Jenny collaborated on were to construct physical maps of the platypus and the opossum; these required painstaking isolation and characterization of large DNA fragments, tagging them with a fluorescent dye, then attaching them to chromosomes where they home in on the DNA containing this sequence and reveal their presence by a bright spot on one of the chromosomes. Pat has ensured that the quality of the chromosomes, the probes and the images are all 100%, and Jenny has made sure the locations make sense and put the map together with other genomic data. These maps were crucial for deciphering the complete DNA sequence of the first marsupial and the first monotreme genome. These projects culminated in major papers on which Pat and Jenny are both authors.

"What will coral reefs look like in 2050?"

Associate Professor Peter Ralph, Executive Director, Plant Functional Biology and Climate Change Cluster (C3), University of Technology, Sydney

Wednesday 5 August 2009 at 7 pm
Conference Room 1, Darlington Centre, University of Sydney

The speaker's presentation can be found here: Peter Ralph Talk (36 MB PDF).

"Accurate measurement: the vital backbone of Australian science & industry"

Dr Laurie Besley, Chief Executive & Chief Metrologist, National Measurement Institute

Wednesday 1 July 2009 at 7 pm
Conference Room 1, Darlington Centre, University of Sydney

Dr Besley is a member of the Royal Australian Chemical Institute and a Fellow of the Institute of Physics (UK). He is also a member of the NATA Council. He is active in a number of international forums including being a consultant to the Executive Committee of the Asia-Pacific Metrology Programme. He is a member of the editorial boards of the international journals "Metrologia", "IET Science Measurement & Technology", and "Accreditation and Quality Assurance". He has worked on a number of occasions as a consultant for the Technical Cooperation programme of the German metrology institute (PTB), mostly in Thailand, and most recently in Sri Lanka.

"New environmentally friendly approaches to cooling buildings"

Professor Geoff Smith, Department of Physics and Advanced Materials, University of Technology, Sydney

Wednesday 3 June 2009 at 7 pm
Conference Room 1, Darlington Centre, University of Sydney

The potential for energy savings in the cooling of buildings is very large and of growing importance as living standards rise, as global warming impacts, and as the "heat island" effect gets worse with increased urbanisation. There are two aspects: (i) passive systems which minimise heat gains, and (ii) active systems and strategies which minimise or eliminate the need for electrically powered cooling. This talk will examine novel materials and systems which play a role in both active and passive reductions in the demand for electrically powered cooling. It will also include results with special paints and nanostructured coatings developed at UTS.

Amplification of night sky radiative cooling using nanostructures and heat mirrors will be outlined, in which material spectral properties and system design in combination optimally exploit the spectral and directional properties of incoming atmospheric thermal radiation. Useful cooling powers under clear skies at temperatures down to ~15℃ below ambient are feasible in well engineered systems, while simple low cost systems can achieve useful cooling powers in the range 5℃ to 10℃ below ambient. There are a many ways such capabilities can be put to use.

The speaker's presentation can be found here: Geoff Smith's Talk (4.6 MB PDF).

Geoff Smith is Professor Emeritus in Applied Physics at the University of Technology, Sydney Australia. He has worked on the science and applications of nanomaterials for over 30 years. His group, in partnership with local and international industry, has pioneered developments in the fields of solar energy, energy efficient windows and paints, radiative cooling, natural lighting and LED lighting. Products and several patents have followed. Key contributions to nano-photonics, thin film optics and polymer optics feature in his work with over 180 reviewed papers and several book chapters. He is chair of the Australian Standards committee on roof glazing and skylights, helped formulate Australia's recent energy efficient building codes, and has chaired an annual International Conference in the USA (SPIE - Nanostructured Thin Films) since 2006. Geoff has a number of overseas and local awards in the renewables and energy field including an honorary doctorate from the University of Uppsala in Sweden in 2003. He is a Fellow of the AIP and of the Institute of Energy.

A summary of the July lecture by Dr Jim Franklin

There is a hole in the atmosphere that can be used to cool buildings. This is important because the electricity used for air-conditioning is a major contributor to greenhouse gas emissions and building running costs. Professor Geoff Smith from UTS explained that at wavelengths below 8 micrometers, the atmosphere is opaque because of absorption from water vapour. Above 13 micrometres it is opaque because of absorption from carbon dioxide and water vapour. So for long and short wavelengths we see a hot opaque atmosphere and no radiative cooling is possible.

Professor Smith then discussed new building materials he has worked on that can help cool buildings. With BASF and others he has helped develop special paints that reflect the infrared part of sunlight but look like ordinary pigments to the naked eye. A special white paint developed by UTS can greatly decrease solar heating. When tested on a Queensland supermarket it cut air-conditioning power consumption by two thirds.

Another interesting material described by Prof Smith is Micronal sheeting (made by BASF). This is plasterboard with a high loading of microcapsules of an alkane wax that changes phase at room temperature. This gives the material superb heat storage capabilities. A 3 cm sheet has the same heat capacity as 18 cm of concrete or 23 cm of brick. A building using this material can have enhanced comfort and reduced costs with minimal air conditioning or heating. In summer one lets in the cold night air to chill the sheets, and then uses them to cool the building during the hot part of the day. In winter, the noon sun warms the sheets, which can heat the building at night. Clearly radiative cooling and new, high tech materials have an important future in cooling buildings.