What you burn Next: What comes outUp: The Rubber Bag Previous: What goes in ``What you burn'' is the number of calories your body uses to provide the energy for everything you do, from heartbeats and breathing to running a marathon. The daily calorie requirement varies quite a bit from person to person depending on size, shape, basic metabolic rate, and degree of physical activity. A rough estimate of calories per day can be obtained by multiplying the ideal weight for your height and body type by a number based on your level of physical activity, ranging from 11 for a pure couch potato to 17 for a person engaged in heavy physical labour or strenuous exercise on a daily basis. The following tables give estimates of the calories burned per day for men and women at their ideal weight, based on height and body type. Height in these tables is your barefoot height. Daily calories burned: Men Daily calories burned: Women
11 cheap gifts guaranteed to impress science geeks | DVICE - StumbleUpon Science comes up with a lot of awesome stuff, and you don't need a Ph.D, a secret lab, or government funding to get your hands on some of the coolest discoveries. We've got a list of 11 mostly affordable gifts that are guaranteed to blow your mind, whether or not you're a science geek. Click on any image to see it enlarged. 1. Also known as frozen smoke, Aerogel is the world's lowest density solid, clocking in at 96% air. Aerogel isn't just neat, it's useful. Price: $35 2. Inside these sealed glass balls live shrimp, algae, and bacteria, all swimming around in filtered seawater. EcoSpheres came out of research looking at ways to develop self-contained ecosystems for long duration space travel. Price: $80 3. NASA has been trying to figure out how to get a sample of rock back from Mars for a while now. Every once in a while, a meteorite smashes into Mars hard enough to eject some rocks out into orbit around the sun. Price: $70+ 4. Price: $150 5. So what's next year's new color going to be? 6.
Record efficiency of 18.7 percent for flexible CIGS solar cells on plastics Public release date: 19-May-2011 [ Print | E-mail Share ] [ Close Window ] Contact: Professor Dr. Ayodhya N. Tiwariayodhya.tiwari@empa.ch 41-587-654-130Swiss Federal Laboratories for Materials Science and Technology (EMPA) It's all about the money. One major advantage of flexible high-performance CIGS solar cells is the potential to lower manufacturing costs through roll-to-roll processing while at the same time offering a much higher efficiency than the ones currently on the market. At the forefront of efficiency improvements In recent years, thin film photovoltaic technology based on glass substrates has gained sufficient maturity towards industrial production; flexible CIGS technology is, however, still an emerging field. Record efficiencies of up to 17.5% on steel foils covered with impurity diffusion barriers were so far achieved with CIGS growth processes at temperatures exceeding 550°C. Scaling up production of flexible CIGS solar cells [ Print | E-mail AAAS and EurekAlert!
Ten Anime Films You Should See Before You Die One of the most surprising, and gratifying, things that has happened since I started my blog, Tim Maughan Books, a year or so ago is the positive feedback I’ve had for the anime reviews—especially from people I know are far from being massive fanboys like myself. It’s gratifying because its part of the reason I started writing them; to try and introduce the medium to people who had never really indulged in it all, at least not past perhaps watching Spirited Away with their kids. The problem is, once you’ve had your first taste, where do you go next? Type ‘anime’ into Google and the results are bewildering, and without a little bit of guidance and a quality filter finding something to watch can be a daunting task. There’s a lot of shit out there, plus a lot of stuff that isn’t really meant for you…unless you’re a ADHD stricken 12 year old emo-ninja-obsessed boy that refuses to eat anything except Pocky and instant Ramen. Akira (1988) Ghost in the Shell (1995) My Neighbor Totoro (1988)
Carbon Nanotubes Transmission electron microscopy of carbon nanotubes: a warning. Carbon nanotube science and technology Carbon nanotubes are molecular-scale tubes of graphitic carbon with outstanding properties. They are among the stiffest and strongest fibres known, and have remarkable electronic properties and many other unique characteristics. For these reasons they have attracted huge academic and industrial interest, with thousands of papers on nanotubes being published every year. The current huge interest in carbon nanotubes is a direct consequence of the synthesis of buckminsterfullerene, C60 , and other fullerenes, in 1985. A transmission electron micrograph of some multiwalled nanotubes is shown in the figure (left). Structure The bonding in carbon nanotubes is sp, with each atom joined to three neighbours, as in graphite. The first two of these, known as “armchair” (top left) and “zig-zag” (middle left) have a high degree of symmetry. The structure of a nanotube can Synthesis Properties Nanohorns
Cell Size and Scale Some cells are visible to the unaided eye The smallest objects that the unaided human eye can see are about 0.1 mm long. That means that under the right conditions, you might be able to see an ameoba proteus, a human egg, and a paramecium without using magnification. A magnifying glass can help you to see them more clearly, but they will still look tiny. Smaller cells are easily visible under a light microscope. To see anything smaller than 500 nm, you will need an electron microscope. Adenine The label on the nucleotide is not quite accurate. How can an X chromosome be nearly as big as the head of the sperm cell? No, this isn't a mistake. The X chromosome is shown here in a condensed state, as it would appear in a cell that's going through mitosis. A chromosome is made up of genetic material (one long piece of DNA) wrapped around structural support proteins (histones). Carbon The size of the carbon atom is based on its van der Waals radius.
Glass lens doorknob gives preview of room beyond Probably not all doors should offer previews, all the time, but this is undeniably wonderful. As it is, the knob offers bi-directional viewing; I wonder if you could half-silver one side and make it one-way? Johnny Strategy at Spoon & Tomago writes: In conjunction with Design Tide Tokyo, architect Hideyuki Nakayama Рa prot̩g̩ of Toyo Ito Рhas teamed up with UNION, a manufacturer of door handles and levers, to create a glass globe doorknob. [via Gizmodo] More: Related
How to Build a DIY Portable Solar Charging System! 5 years ago, it was a lot harder to build your own solar-charging systems but now there are so much more resources plus price of solar systems have dropped quite a bit. If you own a home and you have some space in your backyard (or roof) for solar panels, there’s absolutely no reason why you aren’t powering some of your home electronics via the power of the sun (unless you live in Alaska and it’s no-sun season). Here’s a great example of a DIY portable solar charging system built completely from scratch with most parts bought on eBay, a portable solar charging system with wheels and you can plug-in anything. You’ve probably found this Instructable to gather ideas about making a portable solar power supply yourself. For starters who don’t know anything about solar circuits, you might also want to check out this Solar Power System on Amazon.
A Table That Turns Your Kitchen Into Mini Ecosystem [UPDATED] Convenience and efficiency are king when it comes to product design. What could be more efficient than a natural ecosystem? That's the insight behind a "living kitchen" designed by the brilliant young design studio Studio Gorm. They looked at what we have in our kitchens--fruits, vegetables, organic waste--and figured: That's actually enough to create a miniature system for watering fresh herbs, composting the waste, and generating new soil. None of the elements is brand new to this product, but their integration wins points for ergonomics and ease. Maybe what's most surprising is that Studio Gorm isn't based in the Netherlands or Scandinavia--but rather in Eugene, Oregon. Check out some of Studio Gorm's other designs, including a modular furniture system of pegs and boards; an elegant Egyptian-inspired chair; a handsome adjustable lamp; and an overhead light inspired by--of all things--a falafel container.
Graphene optical modulators could lead to ultrafast communications - StumbleUpon Scientists at the University of California, Berkeley, have demonstrated a new technology for graphene that could break the current speed limits in digital communications. The team of researchers, led by UC Berkeley engineering professor Xiang Zhang, built a tiny optical device that uses graphene, a one-atom-thick layer of crystallized carbon, to switch light on and off. This switching ability is the fundamental characteristic of a network modulator, which controls the speed at which data packets are transmitted. The faster the data pulses are sent out, the greater the volume of information that can be sent. Graphene-based modulators could soon allow consumers to stream full-length, high-definition, 3-D movies onto a smartphone in a matter of seconds, the researchers said. Schematic illustration of the graphene-based optical modulator. Zhang worked with fellow faculty member Feng Wang, an assistant professor of physics and head of the Ultrafast Nano-Optics Group at UC Berkeley.
A Sense of Scale: Absolute Zero By Glenn Elert Posted 01.08.08 NOVA At roughly minus 460°F, absolute zero is abysmally cold, yet at least we can imagine it. Being only a few hundred degrees below zero, it's in the realm of something we can put our minds around. This is not true of the opposite of absolute zero, the theoretical highest possible temperature. In conventional physics, this is approximately 100 million million million million million degrees. Launch Interactive Travel from absolute zero to what may be the highest temperature of all. This feature originally appeared on the site for the NOVA program Absolute Zero. Glenn Elert is Research Coordinator and Webmaster for the Physical Science Department of Midwood High School at Brooklyn College. Images (graphics) © WGBH Educational Foundation
The Top 10 Plants for Removing Indoor Toxins Common indoor plants may provide a valuable weapon in the fight against rising levels of indoor air pollution. NASA scientists are finding them to be surprisingly useful in absorbing potentially harmful gases and cleaning the air inside homes, indoor public spaces and office buildings. The indoor pollutants that affect health are formaldehyde, Volatile Organic Compounds (benzene and trichloroethylene or TCE), airborne biological pollutants, carbon monoxide and nitrogen oxides, pesticides and disinfectants (phenols), and radon. These pollutants contribute to ‘sick building syndrome’, which causes symptoms ranging from allergies, headaches and fatigue through to nervous-system disorders, cancer and death. Through studies conducted by NASA, scientists have identified 50 houseplants that remove many of the pollutants and gases mentioned above. More information on this study as well as references and details on specific chemicals can be found on Dr. Dr. 1. Also called the “Butterfly Palm”.
Solar power without solar cells: A hidden magnetic effect of light could make it possible (PhysOrg.com) -- A dramatic and surprising magnetic effect of light discovered by University of Michigan researchers could lead to solar power without traditional semiconductor-based solar cells. The researchers found a way to make an “optical battery,” said Stephen Rand, a professor in the departments of Electrical Engineering and Computer Science, Physics and Applied Physics. In the process, they overturned a century-old tenet of physics. “You could stare at the equations of motion all day and you will not see this possibility. Light has electric and magnetic components. “This could lead to a new kind of solar cell without semiconductors and without absorption to produce charge separation,” Rand said. What makes this possible is a previously undetected brand of “optical rectification,” says William Fisher, a doctoral student in applied physics. “It turns out that the magnetic field starts curving the electrons into a C-shape and they move forward a little each time,” Fisher said.
14 fun facts you probably didn’t know Source Source Source Some other swear slangs were FLOGGING CULLY. TWIDDLE-DIDDLES. TWIDDLE POOP. Source Source Source Source Source Source Source Also known as Sleeping Beauty Syndrome Source Most Popular Posts This Week