Posted: 17 Jun 2015 09:00 AM PDT
Le designer Duncan Meerding, basé en Tasmanie, a choisi d’utiliser des rondins de bois craquelé pour créer de superbes lampes et ainsi souligner la beauté de la Nature. Chaque fente de la pièce de bois est illuminée à l’action de la lumière jaune. Une création qui redonne une seconde vie à ces éléments naturels.
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mattjeacock/Digital Vision Vectors/Getty Images Will Two-Factor Passwords Be the New Normal for Web Life? Introduction: About.com: Robert: thank you for your time. Being a network security specialist must be both very technical and very frustrating: you see exciting technologies evolve, and you also see how people's lives are negatively impacted when the bad guys win. Can you tell us more about your work, and why you find it so interesting to be in networking security? Robert Siciliano: For the past 30 years I've been embedded in the world of personal security as it relates to violence and theft prevention. These issues used to be primarily physical world proiblems and now they've significantly moved into the realm of the virtual world too. My daily routine consists of consuming all that is wrong and bad in the world and breaking it down so people understand how to proactively prevent it from happening to them. About.com Question 1: The Public Is Being Hurt by Password Theft? Large-scale hacking and credential theft is so commonplace now. Mt.Gox had $460 million bitcoins hacked in spring of this year. the Target chain of stores had its customers' credit card information credentials stolen this last Thanksgiving. Sony Playstation Network and Gawker were hacked several months ago to the tune of 77+ million users' credentials. And now a Russian crime ring has been uncovered as having pilfered 1.2 billion user names and passwords. Is this a worrisome trend? How does this hurt and impact us as private individuals using the Web? Robert Siciliano: It has been said that in the year 2000 that bad guys were about one year behind the good guys in technology. By 2004 they were neck and neck with the good guys. Today, the bad guys seem to be winning in many facets of technology that may one day cause such havoc that the lights may go off and bank accounts end up entirely empty, and that scares me. Every little breach is like a stone in a pond. The ripple effects may not have immediate impact, but they eventually trickle down and affect you and me in multiple ways. A compromised account can cause time and financial headaches that result in martial disputes and so on. That's what is so wrong about all this data insecurity. About.com Question 2: How Hackers Do These Large-Scale Thefts. I know this can be a very technical topic, but you can explain to us how these criminals access private databases and steal our password credentials? Perhaps give us a semi-technical overview of the holes in our websites and how the hackers get in there? Robert Siciliano: There are a number of ways data gets hacked. the most common include criminal hackers looking for vulnerabilities in a company's networks such as flaws in hardware, software or outdated systems that can be compromised. But even the most secure system can be overtaken by a savvy criminal who simply sends an email or makes a phone call and tricks a company employee into giving up his credentials to log into a network. Once in, the criminal can do significant damage. About.com Question 3: Is Two-Factor Authentication the new normal?: Robert, please tell us about 2FA, and how you think it can help. How does 2FA work? Will it stop these large-scale password thefts? How much does 2FA cost? Robert Siciliano: Many of the recent data breaches have exposed passwords as a common denominator.And as you know, if someone gets hold of your password, then your account—and all the data in it—is vulnerable. But there's an easy way to protect your critical accounts from hackers and other infiltrators: Set up a two-factor-verified authentication system. With a two-factor-verified system, knowing your password is only the first step. To get any further, hackers will need to know the second factor, which is a special code (another password, also known as a "one time password" or OTP) that only you know and that changes every time you log in. Accessing your account will be a virtual impossibility. Best of all, it's free. If you're interested in setting up a two-factor-verified system on your accounts, follow the directions below for the major platforms: Google. Go to google.com/2step. Click the blue button, upper right corner, that says “Get Started.” Follow the prompts that then lead to the process; choose text message or a phone call to receive your code. Your setup now applies to all Google services including YouTube. Yahoo. After signing in to your Yahoo account, you can begin Yahoo’s “Second Sign-In Verification” setup by hovering over your photo to trigger a drop-down menu. Click “Account Settings,” then click “Account Info.” Scroll to “Sign-In and Security,” and click the link “Set up your second sign-in verification.” Submit your phone number to receive a code via text. No phone? Yahoo will send you security questions. About.com Question 4: What Can a User Do? People don't need to be reminded that good computer hygiene and rotating passwords is good sense. But can you offer us suggestion on what people can practically do to avoid being a hacker victim? Are there some tools or techniques that can help without adding too much burden on us users? Robert Siciliano: Laptop or PC
Smartphone or tablet
About.com Question 5: Where Do We Go for More Password Details? Robert, please tell us where you personally go online for your news and information? Are there favorite resources and blogs that you frequent? Are there some online resources that would be helpful for the everyperson to become more security-savvy? Robert Siciliano: RSS feeds and Google news alerts keep me informed. Google News key words such as "scam" "identity theft" "hacker" "data breach" and more keep me current on new security issues. With my RSS feeds, certainly About.com, WSJ Tech, ABCNews.com, Wired and a slew of tech trade publications keep me up to the minute. My philosophy is to always be on top of what is new and ahead of what is next at all times. This is how to be proactive, and neither me or my readers/audiences can be caught off guard. About.com Question 6: Final Thoughts for Our Readers. Robert, do you have any final thoughts to share with our readers? Any advice for them? Robert Siciliano: We wear our seat belt because we know its just a matter of time before something bad happens. Information security is no different. This is why being proactive and vigilant is essential. Putting systems in place and maintaining those systems will keep most people safe and secure. About Robert Siciliano: Robert is an expert in personal security and identity theft and a consultant to Hotspot Shield. He is fiercely committed to informing, educating, and empowering Americans so they can be protected from violence and crime in the physical and virtual worlds. His “tell it like it is” style is sought after by major media outlets, executives in the C-Suite of leading corporations, meeting planners, and community leaders to get the straight talk they need to stay safe in a world in which physical and virtual crime is commonplace.
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| Mon, 06/22/2015 - 12:15pm Kim McDonald, University of California, San Diego
The physicists used a helium ion beam to create an atomic scale Josephson junction (shown in the inset) in a crystal of Yttrium Barium Copper Oxide. San Diego (UC San Diego) have developed a new way to control the transport of electrical currents through high-temperature superconductors—materials discovered nearly 30 years ago that lose all resistance to electricity at commercially attainable low temperatures. Their achievement, detailed in two separate scientific publications, paves the way for the development of sophisticated electronic devices capable of allowing scientists or clinicians to non-invasively measure the tiny magnetic fields in the heart or brain, and improve satellite communications. “We believe this new approach will have a significant and far-reaching impact in medicine, physics, materials science and satellite communications,” said Robert Dynes, a professor of physics and former Chancellor of UC San Diego. “It will enable the development of a new generation of superconducting electronics covering a wide spectrum, ranging from highly sensitive magnetometers for biomagnetic measurements of the human body to large-scale arrays for wideband satellite communications. In basic science, it is hoped it will contribute to the unravelling of the mysteries of unconventional superconductors and could play a major role in new technologies, such as quantum information science.” The research team headed by Dynes and Cybart, summarized its achievements in Applied Physics Letters. Another paper outlining the initial discovery was published online in Nature Nanotechnology. The developments breathe new life into the promise of electronics constructed from ceramic materials that become superconducting—that is, lose all resistance to electricity—at temperatures that can be easily achieved in the laboratory with liquid nitrogen, which boils at 77 K or 77 degrees above absolute zero. Physicists first discovered high-temperature superconductivity in a copper-oxide materials in 1986, setting off an intense effort to develop new kinds of electronics and other devices with this new material. “Scientists and engineers worked with fervor to develop these new exciting materials, but soon discovered that they were much more complicated and difficult to work with than imagined,” said Dynes. “These new materials demanded novel device architectures that proved very difficult to realize.” The UC San Diego physicists found a way to control electrical transport through these materials by building a device within the superconducting material called a “Josephson junction,” analogous in function to the transistor in semiconductor electronics. It’s composed of two superconducting electrodes separated by about one nanometer or a billionth of a meter. “Circuits built from Josephson junctions called Superconducting QUantum Interference Devices (SQUIDS), are used for detectors of extremely small magnetic fields, more than 10 billion times smaller than that of Earth,” said Dynes. “One major drawback to these earlier devices is the low temperatures required for their operation, typically just 4 degrees above absolute zero. This requires intricate and costly cooling systems.” “Nearly three decades have passed since the discovery of the first high-temperature superconductor and progress in constructing electronic devices using these materials has been very slow because process control at the sub-10-nm scale is required to make high quality Josephson junctions out of these materials,” he explained. The UC San Diego physicists teamed up with Carl Zeiss Microscopy in Peabody, Massachusetts, which has a facility capable of generating highly focused beams of helium ions, to experiment with an approach they believed might avoid previous problems. “Using the Zeiss Orion’s finely focused helium beam, we irradiated and hence disordered a nanoscale region of the superconductor to create what is called a ‘quantum mechanical tunnel barrier’ and were able to write Josephson circuits directly into a thin film of the oxide superconductor,” said Shane Cybart, a physicist in Dynes’ laboratory who played a key role in the discoveries.. “Using this direct-write method we eliminated the lithographic processing and offered the promise of a straightforward pathway to quantum mechanical circuits operating at more practical temperatures.” “The key to this method is that these oxide superconductors are very sensitive to the point defects in the crystal lattice caused by the ion beam. Increasing irradiation levels has the effect of increasing resistivity and reducing the superconducting transition temperature,” said Cybart. “At very high irradiation levels the superconductor becomes insulating and no longer conducts or superconducts. This allows us to use the small helium beam to write these tunnel junctions directly into the material.” The Nature Nanotechnology paper describes the development of the basic Josephson junction, while the Applied Physics Letters paper describes the development of the magnetic field sensor built from two junctions. The UC San Diego physicists, who filed a patent application to license their discovery, are now collaborating with medical researchers to apply their work to the development of devices that can non-invasively measure the tiny magnetic fields generated within the brain, in order to study brain disorders such as autism and epilepsy in children. “In the communications field, we are developing wide bandwidth high data throughput satellite communications,” said Cybart. “In basic science, we are using this technology to study ceramic superconducting materials to help determine the physics governing their operation which could lead to improved materials working at even higher temperatures.” Source: Univ. of California, San Diego
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| Mon, 06/22/2015 - 11:45am Harvard University.
This image shows the self-assembly of the system through phase separation. The liquid droplets appear as bright fluorescent spots. Image: Harvard Paulson School of Engineering and Applied Sciences. Anything you can do, nature can do better. Chemical delivery systems, self-healing cells, non-stick surfaces—nature perfected those long ago. Now, researchers at Harvard Univ. have hacked nature's blueprints to create a new technology that could have broad-reaching impact on drug delivery systems and self-healing and anti-fouling materials. The secret is secretion. Living tissues rely on their ability to package, transport and secrete liquid, where and when it's needed. Nature's secretion system is responsive, self-regulatory, and intrinsically linked with its surroundings but synthetic systems haven't been able to replicate that complexity until now. The new system, described in Nature Materials, was developed in the lab of Joanna Aizenberg, the Amy Smith Berylson Professor of Materials Science at the Harvard John A. Paulson School of Engineering and Applied Science (SEAS). Aizenberg is also professor in the Dept. of Chemistry and Chemical Biology, co-director of the Kavli Institute for Bionano Science and Technology, and a core faculty member at Harvard's Wyss Institute for Biologically Inspired Engineering, leading the Adaptive Materials Technologies platform there. The new system, self-assembled through phase separation, consists of liquid droplets inside a supramolecular polymer gel with a thin layer of liquid on its surface. When the surface liquid is removed or depleted, the droplets spontaneously release only enough fluid to replace what is lost on the surface. "Current fluid secretion technologies are generally designed with one-time only release mechanisms. Once the fluid is released, it continues flowing, at a consistent pace, until the supply is exhausted, regardless of the needs of its surroundings," said Aizenberg. "These kinds of triggered releases aren't responsive to the consumption of fluid. Our system ties fluid secretion to fluid consumption and controls for when and how much liquid is secreted at a time." The feature is an advance for material application, especially the non-stick, slippery material known as SLIPS (Slippery Liquid-Infused Porous Surfaces) developed in the Aizenberg lab. "This system opens the way to create dynamic designer polymers that are capable of self-relubrication and highly regulated and long-lasting anti-fouling behavior," said Jiaxi Cui, a postdoctoral fellow in Aizenberg's lab and a lead author of the paper. Instability is the key to this system's success. Just as in nature, the secretion system developed by Aizenberg and her team is out of equilibrium, unstable enough to adapt and respond to its surroundings. The supramolecular polymers are reversibly bonded to each other, meaning they can come apart to allow the liquid to filter through the matrix, then stitch themselves back together and adjust to the shrinking liquid reserves. This is a major step forward in the design of self-healing materials. "There is a whole class of self-healing polymers out there, but most can't stitch themselves together if there is a big gash down the middle," said Daniel Daniel, a graduate student in Aizenberg's lab and coauthor on the paper. "Polymers can't fly through the air but they can swim through liquid." When this system is cut down the middle, the newly exposed polymer surface signals droplets to secrete liquid, quickly filling in the crack and bridging the ends of the broken polymers. Over time, the polymer strands will swim through the liquid and stitch themselves back together. Like the gauge on a gas tank, the system can self-report its liquid levels. As the fluid is secreted, the gel becomes more transparent. The system could also be used to improve drug delivery systems. Certain drugs, such as those used to treat cancer, are harmful if released all at one. A system that could not only tell a chemical where and when to release, but how quickly to release, could have a major impact on certain treatments. The Aizenberg lab is at the forefront of this kind of adaptable and responsive material science. "For years, material scientists created static materials and then tried to figure out how to get them to change as an afterthought," Aizenberg said. "Now, the direction of material science is to look at nature and recognize that nature has already invented sophisticated responsive, dynamical material systems, and we can take inspiration from that." Source: Harvard University
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Posted: 21 Jun 2015 02:30 PM PDT
Dans le cadre de l’exposition « Prism » au Daikanyama T-Site, le célèbre photographe français Francis Giacobetti nous révèle une série de clichés inattendus où la danse contemporaine se mêle aux créations sculpturales d’Issey Miyake. Les mouvements extremes des danseurs dévoilent le mécanisme envoutant et la légèreté de ces costumes hyper-créatifs.
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By making these 10 lifestyle changes, you can lower your blood pressure and reduce your risk of heart disease. By Mayo Clinic Staff If you've been diagnosed with high blood pressure, you might be worried about taking medication to bring your numbers down. Lifestyle plays an important role in treating your high blood pressure. If you successfully control your blood pressure with a healthy lifestyle, you might avoid, delay or reduce the need for medication. Here are 10 lifestyle changes you can make to lower your blood pressure and keep it down. 1. Lose extra pounds and watch your waistline Blood pressure often increases as weight increases. Being overweight also can cause disrupted breathing while you sleep (sleep apnea), which further raises your blood pressure. Weight loss is one of the most effective lifestyle changes for controlling blood pressure. Losing just 10 pounds (4.5 kilograms) can help reduce your blood pressure. Besides shedding pounds, you generally should also keep an eye on your waistline. Carrying too much weight around your waist can put you at greater risk of high blood pressure. In general: Men are at risk if their waist measurement is greater than 40 inches (102 centimeters). These numbers vary among ethnic groups. Ask your doctor about a healthy waist measurement for you. 2. Exercise regularly Regular physical activity — at least 30 minutes most days of the week — can lower your blood pressure by 4 to 9 millimeters of mercury (mm Hg). It's important to be consistent because if you stop exercising, your blood pressure can rise again. If you have slightly high blood pressure (prehypertension), exercise can help you avoid developing full-blown hypertension. If you already have hypertension, regular physical activity can bring your blood pressure down to safer levels. The best types of exercise for lowering blood pressure include walking, jogging, cycling, swimming or dancing. Strength training also can help reduce blood pressure. Talk to your doctor about developing an exercise program. 3. Eat a healthy diet Eating a diet that is rich in whole grains, fruits, vegetables and low-fat dairy products and skimps on saturated fat and cholesterol can lower your blood pressure by up to 14 mm Hg. This eating plan is known as the Dietary Approaches to Stop Hypertension (DASH) diet. It isn't easy to change your eating habits, but with these tips, you can adopt a healthy diet: Keep a food diary. Writing down what you eat, even for just a week, can shed surprising light on your true eating habits. Monitor what you eat, how much, when and why. 4. Reduce sodium in your diet Even a small reduction in the sodium in your diet can reduce blood pressure by 2 to 8 mm Hg. The effect of sodium intake on blood pressure varies among groups of people. In general, limit sodium to less than 2,300 milligrams (mg) a day or less. However, a lower sodium intake — 1,500 mg a day or less — is appropriate for people with greater salt sensitivity, including: African-Americans To decrease sodium in your diet, consider these tips: Read food labels. If possible, choose low-sodium alternatives of the foods and beverages you normally buy. 5. Limit the amount of alcohol you drink Alcohol can be both good and bad for your health. In small amounts, it can potentially lower your blood pressure by 2 to 4 mm Hg. But that protective effect is lost if you drink too much alcohol — generally more than one drink a day for women and for men older than age 65, or more than two a day for men age 65 and younger. One drink equals 12 ounces of beer, five ounces of wine or 1.5 ounces of 80-proof liquor. Drinking more than moderate amounts of alcohol can actually raise blood pressure by several points. It can also reduce the effectiveness of blood pressure medications.
Each cigarette you smoke increases your blood pressure for many minutes after you finish. Quitting smoking helps your blood pressure return to normal. People who quit smoking, regardless of age, have substantial increases in life expectancy. 7. Cut back on caffeine The role caffeine plays in blood pressure is still debated. Caffeine can raise blood pressure by as much as 10 mm Hg in people who rarely consume it, but there is little to no strong effect on blood pressure in habitual coffee drinkers. Although the effects of chronic caffeine ingestion on blood pressure aren't clear, the possibility of a slight increase in blood pressure exists. To see if caffeine raises your blood pressure, check your pressure within 30 minutes of drinking a caffeinated beverage. If your blood pressure increases by 5 to 10 mm Hg, you may be sensitive to the blood pressure raising effects of caffeine. Talk to your doctor about the effects of caffeine on your blood pressure. 8. Reduce your stress Chronic stress is an important contributor to high blood pressure. Occasional stress also can contribute to high blood pressure if you react to stress by eating unhealthy food, drinking alcohol or smoking. Take some time to think about what causes you to feel stressed, such as work, family, finances or illness. Once you know what's causing your stress, consider how you can eliminate or reduce stress. If you can't eliminate all of your stressors, you can at least cope with them in a healthier way. Try to: Change your expectations. Give yourself time to get things done. Learn to say no and to live within manageable limits. Try to learn to accept things you can't change. 9. Monitor your blood pressure at home and see your doctor regularly Home monitoring can help you keep tabs on your blood pressure, make certain your lifestyle changes are working, and alert you and your doctor to potential health complications. Blood pressure monitors are available widely and without a prescription. Talk to your doctor about home monitoring before you get started. Regular visits with your doctor are also key to controlling your blood pressure. If your blood pressure is under control, you might need to visit your doctor only every six to 12 months, depending on other conditions you might have. If your blood pressure isn't well-controlled, your doctor will likely want to see you more frequently. 10. Get support Supportive family and friends can help improve your health. They may encourage you to take care of yourself, drive you to the doctor's office or embark on an exercise program with you to keep your blood pressure low. If you find you need support beyond your family and friends, consider joining a support group. This may put you in touch with people who can give you an emotional or morale boost and who can offer practical tips to cope with your condition. source : http://www.mayoclinic.org
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| June 22, 2015 It seems like there are near endless ways to produce power these days, even simply pulling it from the air around you. Now, Plant-e, a Dutch company, has found a way to harness the power of plants. They believe that plants can power cell phones, street lights, and can even act as Wi-Fi hotspots. Their flagship project called Starry Sky was launched last November near Amsterdam. The project powered more than 300 LED streetlights. How does it work? Plant-e explains on their website: “Via photosynthesis a plant produces organic matter. Part of this organic matter is used for plant-growth, but a large part can’t be used by the plant and is excreted into the soil via the roots. Around the roots naturally occurring micro-organisms break down the organic compounds to gain energy from. In this process, electrons are released as a waste product. By providing an electrode for the micro-organisms to donate their electrons to, the electrons can be harvested as electricity. Research has shown that plant-growth isn’t compromised by harvesting electricity, so plants keep on growing while electricity is concurrently produced.” Imagine for a moment that you have a house with a tree growing right through the center of it. Pretty neat, right? Now imagine that same house also being powered by that tree. Could you imagine? No more nasty coal plants, no more environment-destroying hydroelectric dams, just plant power. This technology has a long way to go. LED lights are easy to power because they’re so energy efficient, often using 90% less electricity than their incandescent counterparts. But Plant-e hopes to scale up its technology. Want to learn more? Check out www.plantpower.eu.
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| Mon, 06/22/2015 - 8:47am Susan Reiss, National Science Foundation
This mouse brain was imaged in vivo without imaging agents using fast functional photoacoustic microsopy. The researchers used the hemoglobin in the red blood cells to provide contrast in the left image. Oxygen saturation levels in the hemoglobin in the same mouse brain define the cortical arteries and veins in the right image. Images: Junjie Yao and Lihong Wang, WUSTLA human skull, on average, is about 0.3 in thick, or roughly the depth of the latest smartphone. Human skin, on the other hand, is about 0.1 in, or about three grains of salt, deep. While these dimensions are extremely thin, they still present major hurdles for any kind of imaging with laser light. Why? Laser light contains photons, or miniscule particles of light. When photons encounter biological tissue, they scatter. Corralling the tiny beacons to obtain meaningful details about the tissue has proven one of the most challenging problems laser researchers have faced. However, one research group at Washington Univ. in St. Louis (WUSTL) decided to eliminate the photon roundup completely and use scattering to their advantage. The result: An imaging technique that penetrates tissue up to about 2.8 in. This approach, which combines laser light and ultrasound, is based on the photoacoustic effect, a concept first discovered by Alexander Graham Bell in the 1880s. In his work, Bell found that a focused light beam produces sound when trained on an object and rapidly interrupted--he used a rotating, slotted wheel to create a flashing effect with sunlight. Bell's concept is the foundation for photoacoustics, an area of a growing field known as biophotonics, which joins biology and light-based science known as phototonics. Biophotonics bridges photonics principles, engineering and technology that are relevant for critical problems in medicine, biology and biotechnology. "We combine some very old physics with a modern imaging concept," says WUSTL researcher Lihong Wang, who pioneered the approach. Wang and his WUSTL colleagues were the first to describe functional photoacoustic tomography (PAT) and 3-D photoacoustic microscopy (PAM). Both techniques follow the same basic principle: When the researchers shine a pulsed laser beam into biological tissue, it spreads out and generates a small, but rapid rise in temperature. This increase produces sound waves that are detected by conventional ultrasound transducers. Image reconstruction software converts the sound waves into high-resolution images. Following a tortuous path At the time, he modeled photons as they traveled through biological material. This work led to an NSF CAREER grant to study ultrasound encoding of laser light to "trick" information out of the beam. "The CAREER grant boosted my confidence and allowed me to study the fundamentals of light and sound in biological tissue, which benefited my ensuing career immensely," he says. Unlike other optical imaging techniques, photoacoustic imaging detects ultrasonic waves induced by absorbed photons no matter how many times the photons have scattered. Multiple external detectors capture the sound waves regardless of their original locations. "While the light travels on a highly tortuous path, the ultrasonic wave propagates in a clean and well-defined fashion," Wang says. "We see optical absorption contrast by listening to the object." The approach does not require injecting imaging agents, so researchers can study biological material in its natural environment. Using photoacoustic imaging, researchers can visualize a range of biological material from cells and their component parts to tissue and organs. It detects single red blood cells in blood, as well as fat and protein deposits. While PAT and PAM are primarily used by researchers, Wang and others are working on multiple clinical applications. In one case, researchers use PAM to study the trajectory of blood cells as they flow through vessels in the brain. "By seeing individual blood cells, researchers can start to identify what's happening to the cells as they move through the vessels. Watching how these cells move could act as an early warning system to allow detection of potential blockage sites," says Richard Conroy, director of the Div. of Applied Science and Technology at the National Institute of Biomedical Imaging and Bioengineering. Minding the gap "One imaging modality can't do everything," says Conroy. "Comparing results from different modalities provides a more detailed understanding of what is happening from the cell level to the whole animal." The approach could help bridge the gap between animal and human research, especially in neuroscience. "Photoacoustic imaging is helping us understand how the mouse brain works. We can then apply this information to better understand how the human brain works," says Wang, who along with his team is applying both PAT and PAM to study mouse brain function. Wang notes that one of the challenges currently facing neuroscientists is the lack of available tools to study brain activity such as action potentials, which occur when electrical signals travel along axons, the long fibers that carry signals away from the nerve cell body. "The holy grail of brain research is to image action potentials," he says. With funding from The BRAIN Initiative, Wang and his group are now developing a PAT system to capture images every one-thousandth of a second, fast enough to image action potentials in the brain. "Photoacoustic imaging fills a gap between light microscopy and ultrasound," says Conroy. "The game-changing aspect of this [Wang's] approach is that it has redefined our understanding of how deep we can see with light-based imaging." Source: National Science Foundation
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Posted: 21 Jun 2015 10:09 PM PDT Zuzia Kozerska de Valek Rolling Pins revient avec de nouveaux rouleaux à pâtisserie. En bois et gravés au laser, de nouveaux motifs ont été imaginés par Zuzia, tels qu’un labyrinthe, des cerfs, des dinosaures et hiboux, ainsi qu’une gamme de motifs floraux et d’arabesques. Pour le grand plaisir de vos cookies, à découvrir en images.
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