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MIT's artificial leaf is ten times more efficient than the real thing

MIT's artificial leaf is ten times more efficient than the real thing
Speaking at the National Meeting of the American Chemical Society in California, MIT professor Daniel Nocera claims to have created an artificial leaf, made from stable and inexpensive materials, which mimics nature's photosynthesis process. The device is an advanced solar cell, no bigger than a typical playing card, which is left floating in a pool of water. Then, much like a natural leaf, it uses sunlight to split the water into its two core components, oxygen and hydrogen, which are stored in a fuel cell to be used when producing electricity. Nocera's leaf is stable -- operating continuously for at least 45 hours without a drop in activity in preliminary tests -- and made of widely available, inexpensive materials -- like silicon, electronics and chemical catalysts. It's also powerful, as much as ten times more efficient at carrying out photosynthesis than a natural leaf. Those are impressive claims, but they're also not just pie-in-the-sky, conceptual thoughts.

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Fleeing Vesuvius: The psychological roots of resource over-consumption Here is my updated chapter from Fleeing Vesuvius The psychological roots of resource over-consumption Humans have an innate need for status and for novelty in their lives. Ultracapacitors to Boost the Range of Electric Cars A startup called Nanotune says its ultracapacitor technology could make electric cars cheaper and extend their range. The company, based in Mountain View, California, has developed a way to make electrodes that results in ultracapacitors with five to seven times as much storage capacity as conventional ones. Conventional ultracapacitors, which have the advantage of delivering fast bursts of power and can be recharged hundreds of thousands of times without losing much capacity, are too expensive and store too little energy to replace batteries. Nanotune, however, which has raised $3 million from the venture capital firm Draper Fisher Jurvetson, says its ultracapacitors are close to competing with batteries in terms of energy storage, and could soon surpass them. Using a conventional electrolyte, the company has demonstrated energy storage of 20 watt-hours per kilogram, as opposed to roughly five watt-hours for a conventional ultracapacitor.

The Cause Of Riots And The Price of Food What causes riots? That’s not a question you would expect to have a simple answer. But today, Marco Lagi and buddies at the New England Complex Systems Institute in Cambridge, say they’ve found a single factor that seems to trigger riots around the world. This single factor is the price of food. Lagi and co say that when it rises above a certain threshold, social unrest sweeps the planet. Homemade liqueur recipes: 60+ appetizing drink recipes. Homemade liqueur recipes A small list of homemade-liqueur recipes for making liqueurs, normally requiring long storage. The list includes several near-identical replicas of well-known liqueurs and liqueur brands. A Simple Fix for Farming IT’S becoming clear that we can grow all the food we need, and profitably, with far fewer chemicals. And I’m not talking about imposing some utopian vision of small organic farms on the world. Conventional agriculture can shed much of its chemical use — if it wants to.

Information and communication technologies for environmental sustainability Information and Communication Technologies for Environmental Sustainability (ICT Ensure) is a general term referring to the application of Information and Communication Technologies (ICTs) within the field of environmental sustainability. Information and Communication Technologies (ICTs) are acting as integrating and enabling technologies for the economy and they have a profound impact on our society. Recent changes in ICT use globally have impacted the environment negatively (in terms of waste and energy consumption etc) but also have the potential to support environmental sustainability activities[1] , such as the targets set within the Millennium Development Goal (MDG) number 7 (MDG7) to “ensure environmental sustainability”.[2] New technologies provide utilities for knowledge acquisition and awareness, early evaluation of new knowledge, reaching agreements and communication of progress in the interest of the human welfare. Application areas[edit]

Windows generate electricity - 1/12 Oxford Photovoltaics has been spun out of the University of Oxford to develop solar cell windows. From the Clarendon lab, its fundamental technology is a screen-printable solid-state dye-sensitised solar cell (DSSC). DSSCs, also known as Grätzel cells after their inventor, owe more to photosynthesis than to conventional silicon solar cells. In them, a dye and titanium dioxide are combined with an electrolyte.

Camera Culture, MIT Media Lab The Camera Culture Group is looking for outstanding people who can seamlessly work with an energetic team with cross-domain expertise. If you are talented and highly motivated about transitioning cutting edge medical imaging technology into a product, and you would like to make an impactful contribution, we would like you to join us. Our team works constantly on hardware and software. Best Websites The internet is a big place, with a lot of content. Over one billion websites at the time of writing. With the web constantly changing, it’s hard to keep track of which sites have the best content and resources. To help make things easier, we’ve compiled this enormous list of the best websites on the internet, split into their relevant categories.

The Big Idea: Perennial Grains Humans made an unwitting but fateful choice 10,000 years ago as we started cultivating wild plants: We chose annuals. All the grains that feed billions of people today—wheat, rice, corn, and so on—come from annual plants, which sprout from seeds, produce new seeds, and die every year. "The whole world is mostly perennials," says USDA geneticist Edward Buckler, who studies corn at Cornell University. "So why did we domesticate annuals?" Not because annuals were better, he says, but because Neolithic farmers rapidly made them better—enlarging their seeds, for instance, by replanting the ones from thriving plants, year after year.

Synthetic Rubisco For 91 years, Nenana, a village of 450 people, 55 miles southwest of Fairbanks, has held a wager on the exact moment that the ice breaks up on the nearby Tanana River. The winners in 2007 shared a jackpot of $303,272. But for geophysicists, the historical record of Tanana's yearly thaw since 1917 is far more valuable as evidence of a longterm warming trend affecting lakes and rivers throughout the Northern Hemisphere. In Profile: Ramesh Raskar In 2007, Ramesh Raskar was one of the most promising young researchers at the Mitsubishi Electric Research Labs in Cambridge, Mass. Four years earlier, Technology Review had honored him as one of its top innovators under 35, and while he was steadily publishing academic papers, his name was also on dozens of patents, several of which had found their way into Mitsubishi products. The job was lucrative and left him plenty of time for a personal life.

Power Meter Thanks for checking out this Internet Explorer 9 Platform Preview demo. Browser Power Consumption The browser power meter displays the minimum setTimeout callback interval which indicates the browsers impact on power consumption. The shorter the interval, the less time the CPU can enter longer sleep states therefore consuming more power and impacting battery life.

Perennial Wheat Feasibility Study The Perennial Wheat Feasibility project assessed the feasibility of developing perennial wheat for Australia. Perennial wheat lines from Washington State University and The Land Institute (Kansas) were grown in the field in Cowra and Woodstock, New South Wales, together with various stable wheat/wheatgrass amphiploid hybrids from around the world. Some of these wheats were able to successfully yield grain for three consecutive years, effectively proving the concept of perennial wheat, particularly in the long season (high rainfall zone) temperate climates.

Natural photosynthesis is so ancient that it cannot distinguish between carbon dioxide and oxygen - hence the low efficiency. by pauljacobson May 12

The end of the Age of Burning? It is coming! Of course, Nocera's work is focussed on a hydrogen & oxygen economy - different in quality from the water-based economy of electricity and oxygen that will be the ultimate solution. Check it out in my New Energy Pearltree. by pauljacobson Apr 1

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