What happens after we’re all connected? When I asked that question, seven years ago, well over eighty percent of all Australians had their own mobile, and...
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Extreme weather arising from a climate phenomenon in the Pacific Ocean will get much worse as the world warms, according to climate modelling.
Extreme weather arising from a climate phenomenon in the Pacific Ocean will get much worse as the world warms, according to climate modelling.
Parts of the world will have weather patterns that switch between extremes of wet and dry, say scientists.
The US will see more droughts while flooding will become more common in the western Pacific, research suggests.
The study, in Nature Climate Change, adds to a growing body of evidence over climate change and extreme weather.
The latest data - based on detailed climate modelling work - suggests extreme La Nina events in the Pacific Ocean will almost double with global warming, from one in 23 years to one in 13 years.
Most will follow extreme El Nino events, meaning frequent swings between opposite extremes from one year to the next.
Lead researcher Dr Wenju Cai from the Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia, said this would mean an increase in the occurrence of "devastating weather events with profound socio-economic consequences".
"El Nino and La Nina can be a major driver of extreme weather," he said. "We are going to see these extreme weather [events] become more frequent."
El Nino and La Nina are complex weather patterns arising from variations in ocean temperatures in the Equatorial Pacific. They can have large-scale impacts on global weather and climate.
La Niña is sometimes referred to as the cold phase and El Niño as the warm phase of this natural climate phenomenon.
The researchers explored ways to improve “vertically integrated nanogenerator” energy-harvesting chips based on ZnO. They inserted an aluminum-nitride insulating layer into a conventional energy-harvesting chip based on ZnO and found that the added layer increased the output voltage a whopping 140 to 200 times (from 7 millivolts to 1 volt, in one configuration). This increase was the result of the high dielectric constant (increasing the electric field) and large Young’s modulus (stiffness).
Sir Tim Berners-Lee calls for net access to be treated as a basic right, following a report suggesting great inequalities online.
The web is becoming less free and more unequal, according to a report from the World Wide Web Foundation.
Its annual web index suggests web users are at increasing risk of government surveillance, with laws preventing mass snooping weak or non-existent in over 84% of countries.
It also indicates that online censorship is on the rise.
The report led web inventor Sir Tim Berners-Lee to call for net access to be recognised as a human right.
The World Wide Web Foundation, led by Sir Tim, measured the web's contribution to the social, economic and political progress of 86 countries.
Other headline findings from the report include:74% of countries either lack clear and effective net neutrality rules and/or show evidence of traffic discrimination62% of countries report that the web plays a major role in sparking social or political action74% of countries are not doing enough to stop online harassment of women
The index ranked countries around the world in terms of:universal accessrelevant content and usefreedom and opennessempowerment
Four of the top five were Scandinavian, with Denmark in first place, Finland second and Norway third. The UK came fourth, followed by Sweden.
"The richer and better educated people are, the more benefit they are gaining from the digital revolution," said Anne Jellema, chief executive of the World Wide Web Foundation, and the lead author of the report.
Limitless movie poster (credit: Virgin Produced) Is it possible to rapidly increase (or decrease) the amount of information the brain can store?
The study is described in an open-access paper in Cell Reports. Funding was provided by he Canadian Institutes of Health Research (CIHR), the Natural Sciences and Engineering Research Council of Canada, and U.S. National Institutes of Health.
A paper that claims that smoking causes cancer or that terrorism is caused by poverty is valuable only if it turns out to be a good explanation of cancer or terrorism. As recently noted by Philip Gerrans at the University of Adelaide, “[It] is why an original and true explanation is the gold standard of academic markets.”
Natural selection isn’t nearly enough to explain how life created so many innovations so fast. Fortunately for us, writes SFI External Professor Andreas Wagner in a new book, Nature had something else up her sleeve: robustness.
Even in organisms with relatively few genes, the number of possible combinations of those genes is unimaginably enormous — many, many orders of magnitude greater than the number of hydrogen atoms in the Universe. Even 3.7 billions years isn’t enough to search all those possibilities at random and find all the forms of life we have today.
In Arrival of the Fittest: Solving Evolution's Greatest Puzzle (Current Hardcover , October 2, 2014), Wagner shows how robustness, long a subject of interest at SFI, helped solve the problem. Metabolic systems, protein interactions, and gene regulation networks share a particular kind of robustness: even drastic changes to the underlying structure leaves their operations unchanged. For example, the complex of chemical reactions that metabolize glucose in E. coli can overlap by as little as 20 percent and still function perfectly well.
Read a review of Wagner's book by Mark Pagel in Nature (October 1, 2014)
In the September Scientific American, devoted to human evolution, paleoanthropologist Ian Tattersall discusses how a capacity for toolmaking and other cultural developments worked in conjunction with luck to foster the success of Homo sapiens. Luck came in the form of the climate shifts that served to accelerate the rate of evolution and the adaptation of beneficial traits among certain of our archaic forebears.
In the video here Tattersall describes how his field has changed since he first entered it nearly 50 years ago. Students of human evolution long believed that the story of our species origins was linear, “from primitiveness to perfection.” Scientists now know that the evolutionary path from apes to modern man was far more convoluted, populated with many rival hominins (the group including modern humans and their extinct relations) whose survival was periodically challenged by unpredictable climate shifts.
He also speaks of what makes Homo sapiens special. That our species is the only surviving hominin in the world is testament, he says, to how exceptional we are. We are unique in that we use symbols to represent the world, moving them around and recombining them to create “alternatives to existing reality.” This cognitive faculty also means we are able to ponder where we came from. The study of human evolution, Tattersall notes, holds “a special fascination for human beings, who, of course, are a very egotistical species.”
It may be possible to train the brain to prefer healthy low-calorie foods over unhealthy higher-calorie foods, according to new research.
It may be possible to train the brain to prefer healthy low-calorie foods over unhealthy higher-calorie foods, according to new research by scientists at the Jean Mayer USDA Human Nutrition Research Center on Aging (USDA HNRCA) at Tufts University and at Massachusetts General Hospital. Published online today in the journal Nutrition & Diabetes, a brain scan study in adult men and women suggests that it is possible to reverse the addictive power of unhealthy food while also increasing preference for healthy foods.
"We don't start out in life loving French fries and hating, for example, whole wheat pasta," said senior and co-corresponding author Susan B. Roberts, Ph.D., director of the Energy Metabolism Laboratory at the USDA HNRCA, who is also a professor at the Friedman School of Nutrition Science and Policy at Tufts University and an adjunct professor of psychiatry at Tufts University School of Medicine. "This conditioning happens over time in response to eating -- repeatedly! -- what is out there in the toxic food environment."
Scientists have suspected that, once unhealthy food addiction circuits are established, they may be hard or impossible to reverse, subjecting people who have gained weight to a lifetime of unhealthy food cravings and temptation. To find out whether the brain can be re-trained to support healthy food choices, Roberts and colleagues studied the reward system in thirteen overweight and obese men and women, eight of whom were participants in a new weight loss program designed by Tufts University researchers and five who were in a control group and were not enrolled in the program.
Both groups underwent magnetic resonance imaging (MRI) brain scans at the beginning and end of a six-month period. Among those who participated in the weight loss program, the brain scans revealed changes in areas of the brain reward center associated with learning and addiction. After six months, this area had increased sensitivity to healthy, lower-calorie foods, indicating an increased reward and enjoyment of healthier food cues. The area also showed decreased sensitivity to the unhealthy higher-calorie foods.
A project recently unveiled at the Sao Paulo Design Weekend turns feelings of love into physical objects using 3D printing and biometric sensors. “Each product is unique and contains the most intimate emotions of the participants’ love stories,” explains designer Guto Requena.
The original planetary boundaries were conceived in 2009 by a team lead by Johan Rockstrom, also of the Stockholm Resilience Centre. Together with his co-authors, Rockstrom produced a list of nine human-driven changes to the Earth’s system: climate change, ocean acidification, stratospheric ozone depletion, alteration of nitrogen and phosphorus cycling, freshwater consumption, land use change, biodiversity loss, aerosol and chemical pollution. Each of these nine, if driven hard enough, could alter the planet to the point where it becomes a much less hospitable place on which to live.
We call it white matter because the axons are wrapped in a fatty layer, the myelin, which ensures better neuronal communication – the way information is transferred around the brain. The myelin functions as an “insulation” that prevents information “leaking” from the axon during transfer.
The incorporated entity has a fancy name and all, but it’s less a standard company than a group of about 100 engineers all over the country who spend their free time spitballing ideas in exchange for stock options. That said, this isn’t a Subreddit trying to solve the Boston Marathon bombing. These gals and guys applied for the right to work on the project (another 100 or so were rejected) and nearly all of them have day jobs at companies like Boeing, NASA, Yahoo!, Airbus, SpaceX, and Salesforce. They’re smart. And they’re organized.
Owing to the extreme conditions on the Venusian surface, it's going to be quite some time before a human ever steps foot on that planet. That's why NASA is developing a plan to deploy human-occupied airships in Venus's upper atmosphere. And yes, permanent occupation is the ultimate goal.
Via Alessio Erioli
Stem-cell technology is being used to grow fresh human blood in the laboratory – but don’t hand in your donor card just yet-
In 2007, a team of researchers from the UK and Irish Blood services responded to an oddly specific call from the US military. They wanted scientists to help them build a machine, no bigger than two and a half washing machines, that could be dropped from a helicopter on to a battle field and generate stem-cell-derived blood for injured soldiers.
The team’s application was not successful, but they refocused their efforts and set off on a more utopian mission – to develop a similar technology to create a limitless supply of clean, laboratory-grown blood for use in clinics around the world. Using blood made from stem cells would unshackle blood services from the limits of human supply, and any risk of infection would be removed.
They’ve been working with embryonic or induced pluripotent stem cells, which, given the right culture conditions, can differentiate into any type of cells. Still at least a year from human testing, the team have tweaked their protocol to select only red blood cells.
“Because we make them from human cells they are as nature intended,” says Joanne Mountford, of the University of Glasgow, who leads the project along with Marc Turner, the medical director of the Scottish National Blood Transfusion Service.
“It’s the same thing your body makes but we’re just doing it in a lab.”
Kurt Andersen wonders: If the Singularity is near, will it bring about global techno-Nirvana or civilizational ruin?
Artificial intelligence is suddenly everywhere. It’s still what the experts call “soft A.I.,” but it is proliferating like mad. We’re now accustomed to having conversations with computers: to refill a prescription, make a cable-TV-service appointment, cancel an airline reservation—or, when driving, to silently obey the instructions of the voice from the G.P.S.
But until the other morning I’d never initiated an elective conversation with a talking computer. I asked the artificial-intelligence app on my iPhone how old I am. First, Siri spelled my name right, something human beings generally fail to do. Then she said, “This might answer your question,” and displayed my correct age in years, months, and days. She knows more about me than I do. When I asked, “What is the Singularity?,” Siri inquired whether I wanted a Web search (“That’s what I figured,” she replied) and offered up this definition: “A technological singularity is a predicted point in the development of a civilization at which technological progress accelerates beyond the ability of present-day humans to fully comprehend or predict.”
Siri appeared on my phone three years ago, a few months after the IBM supercomputer Watson beat a pair of Jeopardy! champions. Since then, Watson has been speeded up 24-fold and fed millions of pages of medical data, thus turning the celebrity machine into a practicing cancer diagnostician. Autonomous machines now make half the trades on Wall Street, meaning, for instance, that a firm will often own a given stock for less than a second—thus the phrase “high-frequency trading,” the subject of Flash Boys, Michael Lewis’s book earlier this year. (Trading by machines is one reason why a hoax A.P. tweet last year about a White House bombing made the Dow Jones Industrial Average suddenly drop 146 points.) Google’s test fleet of a couple dozen robotic Lexuses and Priuses, after driving more than 700,000 miles on regular streets and highways, have been at fault in not a single accident. Meanwhile, bionic and biological breakthroughs are radically commingling humans and machines. Last year, a team of biomedical engineers demonstrated a system that enabled people wearing electrode-embedded caps to fly a tiny drone helicopter with their minds.
Machines performing unimaginably complicated calculations unimaginably fast—that’s what computers have always done. Computers were called “electronic brains” from the beginning. But the great open question is whether a computer really will be able to do all that your brain can do, and more. Two decades from now, will artificial intelligence—A.I.—go from soft to hard, equaling and then quickly surpassing the human kind? And if the Singularity is near, will it bring about global techno-Nirvana or civilizational ruin?
An important and well written read..
A Mediterranean diet is a better way of tackling obesity than calorie counting, leading doctors say.
A Mediterranean diet may be a better way of tackling obesity than calorie counting, leading doctors have said.
Writing in the Postgraduate Medical Journal (PMJ), the doctors said a Mediterranean diet quickly reduced the risk of heart attacks and strokes.
And they said it may be better than low-fat diets for sustained weight loss.
Official NHS advice is to monitor calorie intake to maintain a healthy weight.
Last month NHS leaders stressed the need for urgent action to tackle obesity and the health problems that often go with it.
The PMJ editorial argues a focus on food intake is the best approach, but it warns crash dieting is harmful.
Signatories of the piece included the chair of the Academy of Medical Royal Colleges, Prof Terence Stephenson, and Dr Mahiben Maruthappu, who has a senior role at NHS England.
They criticise the weight-loss industry for focusing on calorie restriction rather than "good nutrition".
Analogue” and “digital” are the two polar opposites of our modern world. The word “analogue” has become our catch-all term for what we see as slow, one-way and limited in functional possibilities; while “digital” is our synonym for the dynamic, interactive and fluid.
Conductive inks such as those produced by the British firm Bare Conductive mean that pen and ink can be used to make circuits – and a piece of paper could feasibly become a circuit board, much like that in a computer but infinitely more flexible and versatile.
Investor Peter Thiel has inspiring advice for wanna-be entrepreneurs, but he is unrealistic about where technology really comes from.
Is the technology investor Peter Thiel brilliant, or is he just strange? He is nothing if not industrious. Since he cofounded PayPal, in 1998, Thiel has had a hand in some of the most important and unexpected tech companies of our era. His success has made him an oracular presence in Silicon Valley.
Thiel’s contrarianism is notorious, and he appears to delight in saying or doing the unexpected, even at the risk of ridicule. Each year, his nonprofit gives a handful of college students $100,000 to drop out of school and pursue a risky startup. He has declared himself to be not only against taxes but against “the ideology of the inevitability of death.” And when the Seasteading Institute—a utopian group intent on building floating cities so as to escape the intrusions of government—sought funding a few years ago, Thiel ponied up half a million dollars.
If one wanted to emulate Peter Thiel’s success, would one have to do more than just the opposite of everyone else? His new book—a polished version of some lectures he gave at Stanford for aspiring entrepreneurs in 2012—suggests that there is such a creed as Thielism. His theories on what makes a good technology company and how such companies can improve society are by turns brazen, thoughtful, and precise; the challenge lies in separating the truth from the truthiness. Thiel insightfully diagnoses the failings of today’s technology (see Q&A), but the cures he suggests are questionable.
According to Thiel, most startups funded by his fellow Silicon Valley investors shouldn’t exist. All prospective entrepreneurs, he suggests, should ask themselves a simple and essential question: “What valuable company is nobody building?” If they don’t have an answer, they should do something else.
Squid and other cephalopods control their skin displays by contracting color-filled cells. A team of engineers attempted the same using elastomer and electrical pulses.
Displays are becoming flatter and flexible, so why not stretchable as well? A study published today in Nature Communications describes a paper-thin, elastic film that lights up when stimulated by an electric pulse. It’s a technology that could some day be used to make fold-up light sources, on-demand camouflage, or possibly even the Tron jumpsuit you’ve always wanted.
The engineers of the film were inspired by the skin of octopuses, squid, and cuttlefish, which can change color using tiny, ring-shaped structures called chromatophores. Each chromatophore is pigment-filled and ringed with tiny muscles. By contracting or expanding the chromatophores in different patterns, the cephalopods can create dazzling displays, or camouflage themselves from sight.
The new soft, stretchable elastomer is chemically combined with artificial, fluorescent-color versions of chromatophores, called mechanophores. Electrical pulses activate the mechanophores and create flourescant patterns. Different pulse strengths change the colors, and once the pulse is shut off the pattern instantly clears.
“Algorithm” is a word that one hears used much more frequently than in the past. One of the reasons is that scientists have learned that computers can learn on their own if given a few simple instructions. That’s really all that algorithms are mathematical instructions. Wikipedia states that an algorithm “is a step-by-step procedure for…
The future will not be like the past. The future will be built by those who will take risks and action to invent the world they want.
Our civilization’s needs are expanding rapidly, as seven billion people reach for the lifestyle of the 700 million most well off while our physical resources cannot keep pace.