Accueil - Expo-sciences Siemens Foundation - STEM Academy & We Can Change the World The Siemens Foundation has long been committed to advancing Science, Technology, Engineering and Math education – and we continue that commitment as we broaden our focus to address our nation’s STEM-related workforce development needs. There are some important changes in the way we pursue that commitment; changes that build upon our past and strengthen our ability to partner with, and serve, society. To pave the way for this commitment, the Siemens Foundation is discontinuing two programs – the Siemens We Can Change the World Challenge and the Siemens STEM Academy. While we are proud to have played a role in the education and training of thousands of students and teachers over the years, this change is necessary for the Siemens Foundation to focus on its evolving workforce development platform. We are honored to have worked with our program alumni.
The mini AR Drone The copter flies away & returns to the starting point at 2 different altitudes, using only optical flow odometry for position & sonar for altitude. The fact that it landed at nearly the takeoff position was probably coincidence, but optical flow has proven very accurate in a 30 second hover. It may depend more on time than movement. For the 1st time in many years, the entire autopilot was on board. Only configuration parameters are still stored on the ground station. The takeoff is hard coded for a certain battery charge. It was a lot more stable than the ground based camera. How long can they stay in bounds? Optical flow can hover for around 90 seconds at 0.5m before slipping off the floor pattern. The mane requirement in optical flow is the angular motion needs to be very accurately eliminated or it won't work at all. The heading & altitude need to be factored in when integrating optical flow or it won't accurately calculate position. Straight lines of featureless tape were the worst.
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Chat Gouttière : chat et chaton. Chat de gouttière Comme les hommes, les chats ont des caractéristiques différentes suivant qu’ils habitent les îles, la terre ferme, vivent en appartement ou dans la rue. Le chat commun, ou plus familièrement le chat de gouttière, bien qu’étant indépendant et vagabond, sait donner à celui qui en prend soin une affection difficile à décrire. L’homme n’est pas intervenu dans sa sélection et il a laissé la nature façonner un large éventail de formes et mille caractères différents. Que peut-on dire de notre ami matou ? D’abord que son attitude envers l’homme ne s’est pas modifiée dans le temps : affectueux et toujours à la recherche de câlins et de caresses, il se montre méfiant, agressif ou voleur uniquement par nécessité. Alors qu’il n’était pas apprécié dans le passé, aujourd’hui l’homme a appris à ne pas sous-évaluer ses qualités et à lui donner du temps et de l’affection.