Gadget Factory - RSA The RSA (Royal Society for the encouragement of Arts, Manufactures and Commerce): an enlightenment organisation committed to finding innovative and creative practical solutions to today’s social challenges. Through its ideas, research and 27,000-strong Fellowship it seeks to harness the extraordinary amount of untapped creative potential in society - by empowering people to be active participants in creating a better world. Overview of the RSA The RSA is a registered charity. Action and Research Centre RSA Action and Research Centre combines practical experimentation with rigorous research to create a unique programme of work. Events Tackling the challenges we face in the 21st century requires us to draw on the best thinking and new evidence about the world around us. Fellowship Working with our global network of 27,000 Fellows to be a force for civic innovation and social change. House Our mission Find out more about our mission
The Making of a Mind-Blowing Space Photo | Wired Science One late night in 2007, Rogelio Bernal Andreo and his wife were driving down Highway 1 along California’s Lost Coast, when his wife opened the moon roof. What spread out above them looked nothing like the mauve sky near their Sunnyvale home. “It was like the Milky Way was in front of us,” said Andreo, a former early eBay employee, who runs a Spanish-language internet company. He pulled out his digital SLR camera and spent two hours trying to capture the vast galaxy. “I started to look on the internet and see all these pictures, really gorgeous pictures,” Andreo said. Two years of intensive study, rigorous practice, and perhaps $10,000 of equipment later, he knows. Thanks to cheaper high-quality digital cameras and editing equipment, creating beautiful images of galaxies, nebulae and star clusters is now within the reach of anyone with a few thousand dollars to spend. But that doesn’t mean the photos aren’t “real.” “The stuff up there is really dim,” Andreo said. See Also:
Open-Collar | Work Smarter Le savoir faire Des stages de courte durée pour un apprentissage facile, par la pratique Pour permettre à chacun de modifier progressivement ses pratiques, de s’initier à un nouvel art de vivre, de s’approprier des savoir-faire écologiques, nous vous proposons chaque week-end et pendant les vacances scolaires, des stages de courte durée (1 à 3 jours). Les « professionnels formateurs » du réseau sont des artisans, des agriculteurs, des artistes, passionnés par leur métier et qui ont choisi de partager leur passion avec vous. Ils vous accueillent en petit groupe (4 à12 personnes), sur le lieu de production, sur un chantier, dans l’atelier, aménagé pour vous recevoir. Que vous soyez débutant, amateur passionné ou que vous réfléchissiez à votre avenir, vous progresserez rapidement, grâce une pédagogie qui associe les explications techniques et la pratique. Certains programmes sont spécialement adaptés aux familles avec enfants. Améliorer sa qualité de vie en dépensant moins
Replication Revolution: Best 3D-Printed Objects in Entertainment, Science and War | Wired Design Amazing 3-D printed creations are starting to surface at an incredible rate, demonstrating the innovation potential that the technique holds for almost every industry. While these machines have been around for over two decades as a bona fide method of high-end design and manufacturing, they had largely gone unnoticed by the general public until the advent of compact, open source, free-software printers like the RepRap. This movement helped bring the technology to a wide group of users and allowed for small-scale commercial, educational, and domestic use. Photo Courtesy of PropShop ModelmakersAerospace Engineering Planes are increasingly being manufacutured with 3-D printers. Construct 2 the HTML5 Game Maker - Scirra.com
Khan Academy Beastly Drone Sub Is 'Underwater Predator' | Danger Room TAMPA, Florida — Ross Lindman gently pats the black hull of his intimidating 25-foot aquatic robot. Then he gestures to the bomblets strapped to either side of it. “This,” says the Columbia Group vice president, “is an underwater Predator.” Lindman isn’t kidding. And that doesn’t remotely approach what the Proteus can carry. “You can strap different types of mines and ordnance to it,” Lindman says, 3,200 pounds’ worth. All of that is in addition to its potential spying capacity. The Proteus is designed to be a somewhat autonomous vehicle: Plug in coordinates for it and watch it go. The Proteus is a step in a direction the Navy’s top officer badly wants the seafaring service to travel. Proteus can’t meet Roughead’s lofty goals. But it’s a step toward a bigger unmanned sub that’s weaponized — the current ones commandos use are about the size of a torpedo. The Proteus takes the first approach. That’s if it works. Photo: Spencer Ackerman See Also:
Céu: a high-level programming language that runs on Arduino The link you provided gives a very similar example to mine and "assumes the do_something() execution time is well below the system tick period and that my_thread() is not preempted": An obvious solution is to write something like this: msg_t my_thread(void *param) { while (TRUE) { do_something(); chThdSleepMilliseconds(1000); /* Fixed interval.*/ }} This example works well assuming that the do_something() execution time is well below the system tick period and that my_thread() is not preempted by other threads that could insert long intervals.If the above conditions are not satisfied you may have do_something() executed at irregular intervals, for example: Also note that the error increases over time and this kind of behavior can lead to anomalies really hard to debug. The tick preemption time is an implementation detail and your program should not depend on it to behave correctly.He even suggests reliable alternatives to the code above. I wonder if someone can reproduce these tests.
Coursera Machine learning is the science of getting computers to act without being explicitly programmed. In the past decade, machine learning has given us self-driving cars, practical speech recognition, effective web search, and a vastly improved understanding of the human genome. Machine learning is so pervasive today that you probably use it dozens of times a day without knowing it. This course provides a broad introduction to machine learning, datamining, and statistical pattern recognition.