Διάφορα καλούδια The strange case of solar flares and radioactive elements Stanford Report, August 23, 2010 When researchers found an unusual linkage between solar flares and the inner life of radioactive elements on Earth, it touched off a scientific detective investigation that could end up protecting the lives of space-walking astronauts and maybe rewriting some of the assumptions of physics. By Dan Stober L.A. Peter Sturrock, professor emeritus of applied physics It's a mystery that presented itself unexpectedly: The radioactive decay of some elements sitting quietly in laboratories on Earth seemed to be influenced by activities inside the sun, 93 million miles away. Is this possible? Researchers from Stanford and Purdue University believe it is. There is even an outside chance that this unexpected effect is brought about by a previously unknown particle emitted by the sun. The story begins, in a sense, in classrooms around the world, where students are taught that the rate of decay of a specific radioactive material is a constant. Random numbers The sun speaks
Parenting Test This page is brought to you by UC Berkeley Parents Network Back to the Jokes & Quotes Collection HOW TO KNOW WHETHER OR NOT YOU ARE READY TO HAVE A BABY MESS TEST Smear peanut butter on the sofa and curtains. Now rub your hands in the wet flower bed and rub on the walls. Place a fish stick behind the couch and leave it there all summer. Obtain a 55-gallon box of Legos. (If Legos are not available, you may substitute roofing tacks or broken bottles.) The opinions and statements expressed on this page are those of parents who belong to the UC Berkeley Parents Network and should not be taken as a position of or endorsement by the University of California, Berkeley.
Natural Handyman - Home Repair Help, Do It Yourself Tips Sundial : How to make your own Cut Out Paper Vertical Sundial Introduction This page is about Sundials. Sundials are instruments that tell you the time with the shadow of the sun. To design a sundial you need to know exactly where you are going to put it, i.e. you need to know the longitude, the latitude and the orientation of the wall with respect to North. I have designed this page and integrated Google Maps. Moreover, you have the possibility to put your vertical Sundial on a window and read the hour from inside the room. Your sundial can be configured to show civil time or civil daylight-saving time, so that it gives you your country's official time as you can see it on TV or your watch. What you need You need to have: This webpage A printer Scissors You need to know: Where is the wall where you want to put your sundial on, located it with google maps. -Zoom in as far as possible. Select the N/S/E/W face desired, from the pull-down menu. Instructions CALCULATE. PUT ON YOUR WALL. Sundial samples Some sundial samples: Links Thank to Sharing
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