Culture

A trauma to the spinal cord, quickly leads to a progressive loss of nerve tissue. This not only affects the injured area, but over time affects also other parts of the spinal cord and even the brain. These neurodegenerative changes can be explored in detail using magnetic resonance imaging. An international team of researchers headed up by Patrick Freund from the Spinal Cord Injury Center of the University of Zurich and the Balgrist University Hospital has now for the first time investigated the extent and progression of microstructural changes over the first two years after a spinal cord injury.

The smaller the initial nerve loss, the better the long-term recovery

In their study, the scientists examined 15 patients who had suffered acute traumatic injuries to the spinal cord as well as 18 healthy study participants after 2, 6, 12, and 24 months. In the brain as well as spinal cord, they determined the anatomical extent of neurodegeneration, the loss of myelin (the insulating layer surrounding nerve cells), as well as the accumulation of iron in the nerve tissue as a result of degeneration and inflammation. It then emerged that there was a direct link between the recovery levels of patients after two years and the extent of neurodegenerative change within the first six months after injury. "The smaller the overall loss of nerve tissue across the neuroaxis at the beginning, the better the patients' long-term clinical recovery," summarizes Patrick Freund.

Predicting long-term recovery by measuring early changes

What the researchers found surprising was the fact that the recovery was steepest within the first six months but neurodegenerative changes greatest within the same time period with no signs of deceleration over two years in the spinal cord and brain. This indicates a fierce competition between compensatory and neurodegenerative changes early after injury. The battle seems to be lost in favor of neurodegeneration over time. Nevertheless, the magnitude of early microstructural changes is predictive of the long term recovery of patients suffering from a spinal cord injury. Crucially, non-invasive, high-resolution neuroimaging provides a mean to predict recovery trajectories and distinguish between neurodegeneration caused by the spinal cord injury itself and beneficial changes resulting from therapy. "We have now a tool to reliably predict recovery and determine the effects of treatments and rehabilitation measures as opposed to spontaneous neurodegeneration in humans" adds neuroimaging specialist Freund. "Clinical studies can thus be carried out more efficiently and cost-effectively in the future."

Clinical studies into the influence of arm and leg exercises planned

The patients who took part in the study will be examined again after five years using the same method. The scientists want to determine whether the neurodegenerative changes will have ceased by then or whether they will still be ongoing. Patrick Freund and his team are also planning training studies that aim to show whether the high-intensity exercising of arm and leg functions helps to slow down or stop the loss of nerve tissue.

Cancer treatment guidelines produced by the US National Comprehensive Cancer Network (NCCN) are often based on low quality evidence or no evidence at all, finds a study published by The BMJ today.

The researchers, led by Dr Vinay Prasad at Oregon Health & Science University, say their findings "raise concern that the NCCN justifies the coverage of costly, toxic cancer drugs based on weak evidence."

NCCN guidelines are developed by a panel of cancer experts who make recommendations based on the best available evidence.

These recommendations are used by US private health insurers and social insurance schemes to make coverage decisions, and guide global cancer practice, but it is not clear how the evidence is gathered or reviewed.

In the US, the Food and Drug Administration (FDA) approves all new drugs and grants new indications for drugs already on the market. The NCCN makes recommendations both within and outside of FDA approvals, but patterns of NCCN recommendations beyond FDA approvals have not been analysed.

So Dr Prasad and his team compared FDA approvals of cancer drugs with NCCN recommendations in March 2016 for a contemporary sample of drugs. When the NCCN made recommendations beyond the FDA's approvals, the evidence used to support those recommendations was evaluated.

A total of 47 new cancer drugs were approved by the FDA for 69 indications over the study period, whereas the NCCN recommended these drugs for 113 indications, of which 69 (62%) overlapped with the 69 FDA approved indications and 44 (39%) were additional recommendations.

Only 10 (23%) of these additional recommendations were based on evidence from randomised controlled trials, and seven (16%) were based on evidence from phase III studies. Most relied on small, uncontrolled studies or case reports, or no offered evidence.

And almost two years after their analysis, the researchers found that only six (14%) of the additional recommendations by the NCCN had received FDA approval.

"The NCCN frequently makes additional recommendations for the use of drugs beyond approvals of the FDA and when it does so, it often fails to cite evidence or relies on low levels of evidence," write the authors.

"Few of these additional recommendations subsequently lead to drug approval," they add. "If there is additional evidence in support of these recommendations the NCCN should improve its process and cite all evidence used."

This is an observational study, so no firm conclusions can be drawn about cause and effect, and the researchers point to some limitations. However, they say, given that NCCN endorsement is linked to reimbursement by many commercial insurers and social insurance schemes, "our results suggest that payers may be covering cancer drugs with varying and scientifically less robust justification."

Finally, they point out that 86% of NCCN guidelines members have financial ties to the pharmaceutical industry, with 84% receiving personal payments and 47% receiving research payments.

"The presence of conflicted physicians has been shown to lead to more optimistic conclusions regarding disputed practices," they say. "Thus our findings raise concern about the nature of the recommendations offered by these individuals."

Jupiter's got no sway. The biggest planet in the solar system has no tilt as it moves, so its poles have never been visible from Earth.

But in the past two years, with NASA's Juno spacecraft, scientists have gotten a good look at the top and bottom of the planet for the first time. What they found astounded them: bizarre geometric arrangements of storms, each arrayed around one cyclone over the north and south poles--unlike any storm formation seen in the universe.

The study, authored by scientists from an international group of institutions including the University of Chicago, is published in March 8's Nature as part of a set of four papers dedicated to new observations from the Juno spacecraft.

Juno launched in 2011 with the ambitious mission of finally seeing beneath the dense clouds covering Jupiter. On July 4, 2016, it finally reached the planet's orbit. Since then it's been orbiting the planet, taking pictures and measuring the planet's profile in infrared, microwave, ultraviolet, gravity and magnetism--and answering questions scientists have had about Jupiter for decades.

One of these was the question of what lay at its elusive poles. When scientists got the first images, they were stunned. At the north pole, eight storms surrounded one storm at the center. At the south pole, it was the same arrangement, only with five storms. But the numbers stayed oddly constant; the storms weren't drifting and merging, as our current understanding of the science suggested they should.

"They are extraordinarily stable arrangements of such chaotic elements," said Morgan O'Neill, a University of Chicago postdoctoral scholar and a co-author on the paper. "We'd never seen anything like it."

The geometry rang a faint bell in O'Neill's mind, though. She found it in the library of strange physical phenomena only observed under special conditions in the laboratory. In the 1990s, scientists observed a similar behavior as they used electrons to simulate a frictionless, turbulent 2-D fluid as it cools. Instead of merging, which tends to happen in such 2-D flows, small vortices would clump together and form equally spaced arrays, or "vortex crystals," around a center.

It's not yet clear whether the same physics underlies both these behaviors, O'Neill said, but it is tantalizing. "The next step is: Can you create a model that builds a virtual planet and predicts these flows?" she said. With further studies, they can understand the forces at play in the swirling storms.

A greater understanding of the physics behind the flows and dynamics of storms is helpful on every planet; though O'Neill did her PhD on the dynamics of cyclones on gas giants (including a prediction that Jupiter's poles would not look like Saturn's: "I got it...partially right," she said), she now uses similar storm modeling to study hurricanes on Earth.

A new British Journal of Dermatology study provides information that may help explain why many people experience eczema and dry skin in the winter.

In tests of skin on 80 adults, the levels of breakdown products of filaggrin--a protein that helps maintain the skin's barrier function--changed between winter and summer on the cheeks and hands. Changes were also seen regarding the texture of corneocytes, cells in the outermost part of the skin's epidermis.

"This study shows clearly that the skin barrier is affected by climatic and seasonal changes. Both children and adults suffer from red cheeks in the winter in northern latitudes and some may even develop more permanent skin conditions such as atopic eczema and rosacea," said senior author Dr. Jacob Thyssen, of the University of Copenhagen, in Denmark. "By the use of high magnification we show that the skin cells suffer from shrinkage and therefore change their surface. The clinical message to individuals are that they should protect their skin with emollients in the winter and sunscreen in the summer.

Nina Goad of the British Association of Dermatologists said: "We already know that humidity can affect the texture of the skin and impact on skin disorders like eczema, and humidity fluctuates according to season. In the winter, rapidly changing temperatures, from heated indoors to cold outdoors environments, can affect the capillaries, and prolonged exposure to wet weather can strip the skin's barrier function. This latest study is interesting as it sheds new light on further reasons for seasonal skin changes, at a cellular level. Given that skin problems are the most common reason for people to visit their doctor, any research that improves our understanding of skin disorders and how best to manage them is always a positive step."

A new International Journal of Nursing Practice study demonstrates that during childbirth, women may benefit from warm showers, perineal exercises with a ball, or the combination of both strategies. The study found positive effects of these strategies in terms of lessening pain, anxiety, and stress.

The study was a randomized controlled trial conducted with 128 women during childbirth who were admitted for hospital birth in São Paulo, Brazil from June 2013 to February 2014.

"When we evaluated pain and anxiety using a visual analog scale, and also evaluated the salivary release of stress hormones before and after interventions of warm showers and perineal exercises with a ball, we found greater tolerance regarding pain, reduction of anxiety, a decrease in the release stress hormones, and an increase in well-being hormones," said lead author Dr. Angelita José Henrique, of the Federal University of São Paulo. "Our results indicate that these interventions should be encouraged because they are safe practices, low-cost, and are directly related to comfort, and they should be used as an adjuvant to medications and anesthesia during childbirth."

Firms hire auditors to create independent assessments of their financial statements, providing assurance to investors and outside parties that they are free from material misstatement.

However -- especially since the economic downturn -- companies pressure auditors to lower their fees as a way to reduce costs. Auditors, in turn, place greater emphasis on more-profitable non-audit services, such as consulting, which can negatively impact audit quality, according to new research from the University of Notre Dame.

"How do Audit Offices Respond to Audit Fee Pressure? Evidence of Increased Focus on Non-audit Services and their Impact on Audit Quality" by Erik Beardsley, assistant professor of accountancy in Notre Dame's Mendoza College of Business, along with Dennis Lassila of Texas A&M University and Thomas Omer from the University of Nebraska-Lincoln, is forthcoming in Contemporary Accounting Research.

The team examined audit fees, non-audit fees and client misstatement rates of 561 audit offices from 2004-2013.

"Audit offices experiencing audit fee pressure appear to focus more on providing non-audit services in relation to their total fees," Beardsley says, "and we find that when they do that, audit quality suffers.

"If financial statements are misstated, then later re-stated," he says, "it means the auditor didn't catch the misstatement before the financial statements were presented, meaning audit quality was low."

Beardsley says firms and investors should be wary of auditors trying to sell more non-audit services, which has been an ongoing concern for the Public Company Accounting Oversight Board. The board has focused on whether non-audit services impair auditor independence and whether it has an effect on audit quality.

The Sarbanes-Oxley Act of 2002, enacted in response to a series of high-profile financial scandals including Enron and WorldCom, set requirements for all U.S. public companies in an effort to improve corporate governance and accountability. Among these requirements were restrictions on the type of non-audit services an auditor may provide.

Beardsley notes, "These restrictions put in place in the early 2000s certainly decreased the amount of non-audit services that auditors provide. However, some firms seem to be focusing on them again, and our study suggests that this could be due in part to the reduced profitability of audit engagements."

This spectacular and unusual image shows part of the famous Orion Nebula, a star formation region lying about 1350 light-years from Earth. It combines a mosaic of millimetre-wavelength images from the Atacama Large Millimeter/submillimeter Array (ALMA) and the IRAM 30-metre telescope, shown in red, with a more familiar infrared view from the HAWK-I instrument on ESO's Very Large Telescope, shown in blue. The group of bright blue-white stars at the upper-left is the Trapezium Cluster -- made up of hot young stars that are only a few million years old.

The wispy, fibre-like structures seen in this large image are long filaments of cold gas, only visible to telescopes working in the millimetre wavelength range. They are invisible at both optical and infrared wavelengths, making ALMA one of the only instruments available for astronomers to study them. This gas gives rise to newborn stars -- it gradually collapses under the force of its own gravity until it is sufficiently compressed to form a protostar -- the precursor to a star.

The scientists who gathered the data from which this image was created were studying these filaments to learn more about their structure and make-up. They used ALMA to look for signatures of diazenylium gas, which makes up part of these structures. Through doing this study, the team managed to identify a network of 55 filaments.

The Orion Nebula is the nearest region of massive star formation to Earth, and is therefore studied in great detail by astronomers seeking to better understand how stars form and evolve in their first few million years. ESO's telescopes have observed this interesting region multiple times, and you can learn more about previous discoveries here, here, and here.

This image combines a total of 296 separate individual datasets from the ALMA and IRAM telescopes, making it one of the largest high-resolution mosaics of a star formation region produced so far at millimetre wavelengths [1].

Half of the Scottish adult population do not feel confident administering CPR - and more than a fifth do not know when it is required, according to a new study led by the University of Stirling.

The study, which has been welcomed by the Scottish Government, is the first to examine the readiness and willingness of Scots to carry out cardiopulmonary resuscitation (CPR). Experts believe the work could help to explain why our survival rates from cardiac arrest are poor when compared to other countries.

Fiona Dobbie, a Research Fellow at the Institute of Social Marketing, part of the Faculty of Health Sciences and Sport, led the work, which also involved the Resuscitation Research Group at the University of Edinburgh and the Scottish Government.

"The findings of our study will help develop policy and future interventions to improve the rate of bystander CPR," Ms Dobbie said. "From a policy perspective, there is a need for more tailored and targeted interventions to encourage CPR training, which has been linked with improving confidence in CPR. As confidence increases, so does the likelihood of providing emergency aid in an out-of-hospital cardiac arrest.

"Our findings suggest that priority groups are people who are not working, in a lower social grade and the elderly."

In 2015, Scotland's Strategy for Out-of-Hospital Cardiac Arrest was launched with the aim of equipping 500,000 people with CPR skills in a bid to save an additional 300 lives per year following an out-of-hospital cardiac arrest.

The new study, which informs the Strategy, comprised an Ipsos MORI survey, which canvassed 1,027 adults in Scotland.

Fifty per cent said they would not feel confident administering bystander CPR, with a further 21 per cent admitting that they would not know if it was required.

Twenty-two per cent would not be comfortable giving CPR, for fear of causing an injury to the victim, while 19 per cent would be reluctant due to their lack of skills. The same proportion would be put off by visible vomit or blood and 16 per cent by indications that the ill person is a drug user, the poll found.

The team found that confidence was affected by age, social grade and employment status; the older the person was, the less likely they were trained in CPR, show willingness to be trained, or feel confident to administer CPR. Fifty-eight per cent of 35 to 44 year olds said that they would like to be trained in CPR, compared to just 37 per cent of 55 to 64 year olds and 23 per cent of those aged 65 and over.

Respondents with professional, managerial and non-manual occupations were more likely to have been trained in CPR than those in manual, unskilled occupations and the long-term unemployed.

Dr Gareth Clegg, a Senior Clinical Lecturer at the University of Edinburgh, an Honorary Consultant in Emergency Medicine at Edinburgh Royal Infirmary, and an Associate Medical Director, of the Scottish Ambulance Service, co-authored the paper.

He said: "Survival from cardiac arrest in Scotland is a poor relative to the best performing centres in the world. One of the most important determinants of survival is bystander CPR, which more than doubles chances of survival.

"We already know that people in the most deprived areas in Scotland are much more likely to have a cardiac arrest, at a younger age, and less likely to survive than those in affluent areas.

"This work is important because it suggests that those living in communities which are most likely to need CPR are least ready to carry it out."

Dr Clegg added: "Using the findings from this research, we hope to develop ways to teach hundreds of thousands of people in Scotland how to perform CPR - and save hundreds more lives each year."

Minister for Public Health Aileen Campbell said: "That half of adults in Scotland in this survey were already confident giving CPR gives us a firm foundation to build on, and to date more than 200,000 people across the country have learned CPR since 2015.

"This is great progress towards our 500,000 target by 2020 and a testimony to the work put in by our Save A Life For Scotland partnership, who have brought these lifesaving skills to more people across the country.

"Any CPR is better than no CPR and we know it's the main way we can increase survival after Out of Hospital Cardiac Arrest."

New research published in The Journal of Physiology indicates that an obese pregnant mother and exposure to a high fat, high sugar diet during pregnancy produces a "fatty liver" in the fetus, potentially predisposing children to obesity, metabolic and cardiovascular disorders later in life. The research aims to understand the cellular mechanisms involved in laying down fat in the liver of a fetus - leading to a "fatty liver". This knowledge is essential to developing strategies to combat childhood obesity.

Throughout the world over fifty percent of women of reproductive age are either overweight or obese. Obesity in pregnant women, combined with intake of high-fat, high-sugar diets during pregnancy predisposes their children to obesity and other chronic metabolic and cardiovascular diseases. These complications probably account for a significant proportion of the current epidemic of childhood obesity.

This research aimed to shed light on the mechanisms underlying this link between obese pregnant mothers and obesity in their child, called developmental programming, which is currently poorly understood. This study found that when a fetus develops in an obese pregnant mother, fat accumulates in its liver and many metabolic pathways are disturbed. This is the first study to report that important recently discovered microRNAs (a DNA product which modifies protein synthesis) play a role in this increased deposition of fat in the liver in our closest relatives, the nonhuman primates. The observations of this study may explain why children of obese mothers live shorter lives than the offspring of normal weight mothers.

While there is always some fat in the liver, when the liver fat increases above normal an individual is said to have a "fatty liver". As the amount of liver fat increases, troubles begin. If this is dealt with early, it can be reversed, however if fat deposition persists, the damage can lead to liver scarring and even later life liver cancer. Therefore it is important to understand the early cellular mechanisms involved in laying down the fat early in life while the fetus is developing.

The research was a joint collaboration between University of Wyoming at Laramie Wyoming, the Texas Biomedical Research Institute, San Antonio, Texas, Wake Forest Baptist Medical Centre, Indiana University School of Medicine and the University of Texas Health Science Center. In order to determine which genes were changed in the fetal liver of obese pregnant monkeys and to identify which microRNAs regulate these genes, genomic and epigenomic methods were used. The altered cellular signalling pathways were identified using bioinformatics approaches, and microscopic studies were conducted to quantify the amount of stored fat and sugar present in the liver cells, as well as assessing their shape, which is an indicator of liver cell health.

Although the researchers were able to see significant changes in many cellular functional pathways the study may have been limited in its ability to show significant changes during even early stages of subjects. A major principle of developmental programming is that significant changes may lie dormant, only to emerge under stress or when hormones begin to change with puberty or aging.

The researchers plan to now investigate metabolic and cardiovascular health of monkey offspring of obese mothers, including liver function at regular intervals across the life course to follow the progress of these fetal changes. This will allow them to assess whether unwanted consequences of maternal obesity can pass across generations from mother to daughter to grandchildren. They also plan to identify interventions that can reverse these unwanted changes using the same technologies employed in this study.

Peter Nathanielsz, one of the lead investigators on the projects commented on the significance of the results: "This research is important as throughout the world over fifty percent of women of reproductive age are overweight or obese. Maternal obesity, combined with high fat, high sugar diets, makes it more likely that children will suffer from liver disease and face health problems such as obesity and heart disease later in life.

"It wasn't until we saw the microscope slides for the staining of liver sections showing very high amounts of lipid in fetuses of obese mothers that we realized the dramatic impact of maternal obesity at such an early developmental time point. Histological analyses of these livers showing the condition steatosis, underlined the detrimental impact of maternal obesity on the developing fetus."

The unique Australian approach of creating quantum bits from precisely positioned individual atoms in silicon is reaping major rewards, with UNSW Sydney-led scientists showing for the first time that they can make two of these atom qubits "talk" to each other.

The team - led by UNSW Professor Michelle Simmons, Director of the Centre of Excellence for Quantum Computation and Communication Technology, or CQC2T - is the only group in the world that has the ability to see the exact position of their qubits in the solid state.

Simmons' team creates the atom qubits by precisely positioning and encapsulating individual phosphorus atoms within a silicon chip. Information is stored on the quantum spin of a single phosphorus electron.

The team's latest advance - the first observation of controllable interactions between two of these qubits - is published in the journal Nature Communications. It follows two other recent breakthroughs using this unique approach to building a quantum computer.

By optimising their nano-manufacturing process, Simmons' team has also recently created quantum circuitry with the lowest recorded electrical noise of any semiconductor device.

And they have created an electron spin qubit with the longest lifetime ever reported in a nano-electric device - 30 seconds.

"The combined results from these three research papers confirm the extremely promising prospects for building multi-qubit systems using our atom qubits," says Simmons.

2018 Australian of the Year inspired by Richard Feynman

Simmons, who was named 2018 Australian of the Year in January for her pioneering quantum computing research, says her team's ground-breaking work is inspired by the late physicist Richard Feynman.

"Feynman said: 'What I cannot create, I do not understand'. We are enacting that strategy systematically, from the ground up, atom by atom," says Simmons.

"In placing our phosphorus atoms in the silicon to make a qubit, we have demonstrated that we can use a scanning probe to directly measure the atom's wave function, which tells us its exact physical location in the chip. We are the only group in the world who can actually see where our qubits are.

"Our competitive advantage is that we can put our high-quality qubit where we want it in the chip, see what we've made, and then measure how it behaves. We can add another qubit nearby and see how the two wave functions interact. And then we can start to generate replicas of the devices we have created," she says.

For the new study, the team placed two qubits - one made of two phosphorus atoms and one made of a single phosphorus atom - 16 nanometres apart in a silicon chip.

"Using electrodes that were patterned onto the chip with similar precision techniques, we were able to control the interactions between these two neighbouring qubits, so the quantum spins of their electrons became correlated," says study lead co-author, Dr Matthew Broome, formerly of UNSW and now at the University of Copenhagen.

"It was fascinating to watch. When the spin of one electron is pointing up, the other points down, and vice versa.

"This is a major milestone for the technology. These type of spin correlations are the precursor to the entangled states that are necessary for a quantum computer to function and carry out complex calculations," he says.

Study lead co-author, UNSW's Sam Gorman, says: "Theory had predicted the two qubits would need to be placed 20 nanometres apart to see this correlation effect. But we found it occurs at only 16 nanometres apart.

"In our quantum world, this is a very big difference," he says. "It is also brilliant, as an experimentalist, to be challenging the theory."

Leading the race to build a quantum computer in silicon

UNSW scientists and engineers at CQC2T are leading the world in the race to build a quantum computer in silicon. They are developing parallel patented approaches using single atom and quantum dot qubits.

"Our hope is that both approaches will work well. That would be terrific for Australia," says Simmons.

The UNSW team have chosen to work in silicon because it is among the most stable and easily manufactured environments in which to host qubits, and its long history of use in the conventional computer industry means there is a vast body of knowledge about this material.

In 2012, Simmons' team, who use scanning tunnelling microscopes to position the individual phosphorus atoms in silicon and then molecular beam epitaxy to encapsulate them, created the world's narrowest conducting wires, just four phosphorus atoms across and one atom high.

In a recent paper published in the journal Nano Letters, they used similar atomic scale control techniques to produce circuitry about 2-10 nanometres wide and showed it had the lowest recorded electrical noise of any semiconductor circuitry. This work was undertaken jointly with Saquib Shamim and Arindam Ghosh of the Indian Institute of Science.

"It's widely accepted that electrical noise from the circuitry that controls the qubits will be a critical factor in limiting their performance," says Simmons.

"Our results confirm that silicon is an optimal choice, because its use avoids the problem most other devices face of having a mix of different materials, including dielectrics and surface metals, that can be the source of, and amplify, electrical noise.

"With our precision approach we've achieved what we believe is the lowest electrical noise level possible for an electronic nano-device in silicon - three orders of magnitude lower than even using carbon nanotubes," she says.

In another recent paper in Science Advances, Simmons' team showed their precision qubits in silicon could be engineered so the electron spin had a record lifetime of 30 seconds - up to 16 times longer than previously reported. The first author, Dr Thomas Watson, was at UNSW undertaking his PhD and is now at Delft University of Technology.

"This is a hot topic of research," says Simmons. "The lifetime of the electron spin - before it starts to decay, for example, from spin up to spin down - is vital. The longer the lifetime, the longer we can store information in its quantum state."

In the same paper, they showed that these long lifetimes allowed them to read out the electron spins of two qubits in sequence with an accuracy of 99.8 percent for each, which is the level required for practical error correction in a quantum processor.

Australia's first quantum computing company

Instead of performing calculations one after another, like a conventional computer, a quantum computer would work in parallel and be able to look at all the possible outcomes at the same time. It would be able to solve problems in minutes that would otherwise take thousands of years.

Last year, Australia's first quantum computing company - backed by a unique consortium of governments, industry and universities - was established to commercialise CQC2T's world-leading research.

Operating out of new laboratories at UNSW, Silicon Quantum Computing Pty Ltd has the target of producing a 10-qubit demonstration device in silicon by 2022, as the forerunner to a silicon-based quantum computer.

The Australian government has invested $26 million in the $83 million venture through its National Innovation and Science Agenda, with an additional $25 million coming from UNSW, $14 million from the Commonwealth Bank of Australia, $10 million from Telstra and $8.7 million from the NSW Government.

It is estimated that industries comprising approximately 40% of Australia's current economy could be significantly impacted by quantum computing. Possible applications include software design, machine learning, scheduling and logistical planning, financial analysis, stock market modelling, software and hardware verification, climate modelling, rapid drug design and testing, and early disease detection and prevention.

A new study using surveys and classroom noise analysis shows the success of a three-year effort by faculty in the Biology Department at San Francisco State University to get smarter about their teaching. The results run counter to conventional wisdom that scientists care more about research than they do about the students in their classrooms.

At the request of her faculty colleagues, Professor of Biology Kimberly Tanner led the effort, which started with a five-day summer training institute in 2013 and snowballed into more workshops and follow-up programs throughout the semester. By the end of the program, 89 percent of the faculty ended up participating in at least one workshop, and 83 percent participated in follow-up programs. Faculty who went through the entire program spent more than 100 hours each on training.

The training focused on a few main techniques, like "active learning" techniques for giving students more control over how they learn, creating tests in a way that accurately assesses student knowledge and creating a more inclusive classroom environment.

To figure out whether the program was actually working, the researchers developed a technique for measuring student participation in class by analyzing recordings of classroom noise. They found that 81 percent of the faculty taking part in the study used active learning techniques in at least half of their class sessions. And surveys of the participating faculty members showed that 96 percent were more confident in their teaching after the training. The results were published in a paper in the journal CBE -- Life Sciences Education, which was posted online in January and is part of the March 1 issue. Almost 70 members of the department were featured as authors.

In the process, the researchers dispelled another myth. "A lot of faculty at other universities think if they devote time to their teaching, their research will suffer," said Tanner. But when surveyed, only 6 percent of study participants reported that. On the other hand, 30 percent said the opposite -- that their research had been positively affected. Tanner suspects this shift is due to a stronger sense of community and a more collaborative atmosphere fostered by the training.

In a discipline that experiences heavy student attrition, these techniques to foster a more engaging classroom are crucial. "The majority of students leave biology," says Tanner. "And they leave based on personal demographics -- more women leave, more students of color leave. These strategies will help us retain more of those students." Tanner hopes the study will also serve as an example that inspires other universities to follow.

Plant immune systems, like those of humans and animals, face a difficult balancing act: they must mount responses against ever-evolving pathogens, but they must not overdo it. Immune responses require energy and resources and often involve plants killing their own infected cells to prevent the pathogens from spreading.

Researchers at Durham University in the UK have identified a crucial link in the process of how plants regulate their antiviral responses. The research is published in the March 2 issue of the Journal of Biological Chemistry.

Martin Cann's lab at Durham, in collaboration with the laboratories of Aska Goverse at Wageningen University and Frank Takken at the University of Amsterdam, studied a receptor protein called Rx1, which is found in potato plants and detects infection by a virus called potato virus X.

Binding to a protein from the virus activates Rx1 and starts a chain of events that results in the plant mounting an immune response. But the exact sequence of cellular events - and how Rx1 activation was translated into action by the rest of the cell - was unknown.

"Our study revealed an exciting, and unexpected, link between pathogen attack and plant DNA," Cann said.

Specifically, the study showed that Rx1 joins forces with a protein called Glk1. Glk1 is a transcription factor, meaning it binds to specific regions of DNA and activates genes involved in cell death and other plant immune responses. The team found that when Glk1 bound to virus-activated Rx1, it was able to turn on the appropriate defense genes.

Interestingly, when the viral protein was absent, Rx1 seemed to have the opposite effect - actually keeping Glk1 from binding to DNA. In this way, it prevented an inappropriate immune response.

"(T)he immune response involves reprogramming the entire cell and also often the entire plant," Cann said. "(A)n important part of this regulatory process is not only allowing activation but also making sure the entire system is switched off in the absence of infection."

As over a third of the annual potential global crop harvest is lost to pathogens and pests, breeding plants with better immune systems is an important challenge. Understanding how this immune system is regulated at the appropriate level of activity gives the researchers more ideas of points in the immune signaling pathway that could targeted to increase the plant's baseline ability to resist disease.

"To increase (crop) yield, there is an urgent need for new varieties that are resilient to these stresses," Cann said. "A mechanistic understanding of how plants resist or overcome pathogen attack is crucial to develop new strategies for crop protection."

Describing a toothpaste as "limited edition" or a Rolls Royce as a "best-seller" would sound off-key or even confusing to most consumers and could well steer them away from making a purchase. That's because, new research shows, individuals are inclined to have different mindsets depending on their consumption goals, and marketers should tailor their messages accordingly.

In "The Perfect Fit: The Moderating Role of Selling Cues on Hedonic and Utilitarian Product Types," three researchers - Gopal Das of the Indian Institute of Management, Amaradri Mukherjee of Portland State University, and Ronn J. Smith of the University of Arkansas - explore the impact of popularity versus scarcity cues and product types on consumers' perceptions of risk, product uniqueness, and purchase intentions. Their paper is forthcoming in the March issue of the Journal of Retailing.

In a series of studies, the authors probe how individuals' inclinations - whether they are more risk-averse or more aspirational -- relate to how likely they are to buy a product. Sales cues like "limited edition" or "best-seller" play to these inclinations: limited edition connotes exclusivity to those seeking an achievement of sorts, while a best-seller implies that a product is dependable. As such, these cues are important guardrails in guiding how a product would be most effectively marketed.

In one study, undergraduate participants were surveyed to determine their particular focus, then randomly shown two different print ads for a digital SLR camera. One ad promoted the camera as a best-seller, the other as a limited edition. How dependable either version was mattered little to individuals more focused on achievement, whereas risk-averse individuals were almost twice as wary of buying the limited-edition camera. However, the reverse was true for the best-seller: risk-averse buyers preferred it by a factor of two compared to the aspirational buyers, who were indifferent to that quality.

Savvy retailers, both online and bricks-and-mortar, might consider mining this insight via data analytics and loyalty programs that decode their customers' mindsets, the authors suggest: "When the selling cues are properly aligned with product types, it leads to better goal fulfillment of the shopper."

A naturally occurring compound found in cannabis may help to curb the frequency of epileptic seizures, suggests a review of the available evidence, published online in the Journal of Neurology Neurosurgery & Psychiatry.

But the evidence to date is confined to the treatment of children and teens whose epilepsy does not respond to conventional drugs, and rare and serious forms of the condition, caution the researchers.

Between 70 and 80 percent of people newly diagnosed with epilepsy manage to control their seizures completely using conventional drugs such as valproate and carbamazepine, but that still leaves up to a third whose condition is unresponsive to these treatments.

Preliminary research suggests that naturally occurring compounds found in cannabis (cannabinoids) may dampen down convulsions. And one of these cannabinoids, cannabidiol or CBD for short, seems to show promise for curbing seizures.

To explore this in more depth, the researchers trawled research databases for relevant published and unpublished studies looking at the potential impact of cannabinoids as an add-on to usual treatment on epilepsy seizures, and published up to October 2017.

Out of an initial haul of 91 studies they found six clinical trials (555 patients) and 30 observational studies (2865 patients) that were eligible for inclusion in their review.

All the participants, whose average age was 16, had rare forms of epilepsy that had not responded to usual treatment.

Pooled analysis of the clinical trial data showed that CBD was more effective than a dummy (placebo) drug at cutting seizure frequency by 50 percent or more, and improving quality of life.

CBD was also more effective than placebo at eradicating seizures altogether, although this was still rare.

But the risk of side effects (dizziness and drowsiness), although small, was significant--24 percent higher--while that of serious side effects was twice as high among those taking cannabidiol.

Pooled data from 17 of the observational studies showed that seizure frequency dropped by at least 50 percent in just under half of the patients and disappeared completely in nearly one in 10 (8.5%) in eight of these studies.Quality of life improved in half of the patients in 12 of the studies.

"Pharmaceutical grade CBD as adjuvant treatment in paediatric onset drug resistant epilepsy may reduce seizure frequency," conclude the researchers. "Existing [randomised controlled trial] evidence is mostly in paediatric samples with rare and severe epilepsy syndromes; [randomised controlled trials] examining other syndromes and cannabinoids are needed."

WASHINGTON -- Whether you pick low-carb, low fat or another diet plan, scientific research indicates each can help some people achieve modest long-term weight loss with potential improvement in health risks, according to the Scientific Statement the Endocrine Society issued today on managing obesity.

The authors found the Mediterranean Diet and DASH diet provide demonstrated benefits for improving cardiovascular disease, and in lower calorie versions may be beneficial for weight loss.

Given the number of diets, medications and surgical procedures available to treat obesity, the best approach for each individual depends on genetics, health and how well they can adhere to a particular regimen, the statement's authors concluded. Still, maintaining long-term weight loss remains challenging, and individuals with obesity should expect to regain weight when they stop treatment.

"The stigma around this disease makes it difficult to address obesity as a public health problem," said George A. Bray, M.D., of Louisiana State University's Pennington Biomedical Research Center in Baton Rouge, La., who chaired the task force that developed the Scientific Statement. "There often is a mismatch between the patient's cosmetic goals and what can realistically be achieved with diet and exercise. While a modest 5 percent to 10 percent weight loss can yield significant health benefits, that may not provide the cosmetic changes patients seek."

Obesity remains a worldwide public health issue. More than 1.9 billion adults worldwide meet the criteria for obesity or overweight, according to the World Health Organization.

Obesity is associated with and contributes to a shortened life span, type 2 diabetes, cardiovascular disease, some cancers, kidney disease, sleep apnea, osteoarthritis and other conditions. Weight loss can lower the risk of developing these conditions and improve health outcomes.

The statement's authors examined the latest scientific evidence on a variety of diets, commercial diet plans such as Weight Watchers, exercise, obesity medications and types of bariatric surgery. Based on a review of more than 400 studies and peer-reviewed articles on obesity, the experts found all of the weight loss interventions had a high degree of variability when it came to effectiveness.

"Individual weight loss approaches worked well for some people and not for others," Bray said. "Currently, we have limited genetic and other information to predict which intervention will work for a given individual. This demonstrates just how complex the problem of severe obesity is."

Surgical approaches tended to lead to greater and longer lasting weight loss than other treatment options, the authors found.

Many consumers turn to dietary supplements, which are not evaluated by the U.S. Food and Drug Administration (FDA). There is little scientific evidence to show these supplements can effectively support weight loss or even that they are safe. Having the FDA oversee dietary supplements and holding these products to higher safety and efficacy standards would benefit public health, according to the statement authors.

Recent studies have examined whether some individuals with a body-mass index (BMI) that meets the criteria for obesity can maintain healthy blood pressure, cholesterol levels, blood sugar and levels of fats in the blood called triglycerides. The statement authors concluded metabolically healthy obesity is likely a short-term state, and individuals who fit the criteria are likely to develop metabolic and cardiovascular problems over time.

"Effectively treating obesity is crucial if we are going to be able to address the devastating impact diabetes and cardiovascular disease have on public health," Bray said. "We are seeing promising research into diabetes medications linked to weight loss, the use of peptides to enhance weight loss, and improved techniques for modulating the way food moves through the digestive system and is absorbed into the body. As our scientific understanding of obesity continues to improve, we hope this will lead to the discovery of new treatment approaches."