domingo, julio 20, 2014

si te accidentas, te localizan con un drone /vacaciones aventura bici Usa / Golpe y carrera (sin porsche!)

BMX: Buscando lo mejor de Seúl

Corey Martínez, Bruno Hoffmann, Brian Kachinsky, Matthias Dandois y Anthony Perrin.


Students develop drone to locate survivors via their mobile phones

By Darren Quick July 17, 2014

These days, most people are inseparable from their mobile phone, with the device being one of the essentials along with keys and cash or cards that people don't leave home without. A project at EPFL's Mobile Communications Laboratory is looking to take advantage of this fact by developing a drone that would help rescuers search for victims of natural disasters by locating their phones.When a mobile phone's Wi-Fi is switched on, the device emits data packets at regular intervals. The strength of these signals can vary depending on the surrounding terrain, the weather, interference, or if the device is buried under a layer of rubble as the result of an earthquake or other natural disaster.

Taken in isolation, with all these variables it isn't possible to accurately calculate the location of the device that is emitting the signals. However, by capturing the signals from several different points it becomes possible to calculate the device's approximate location. This is where the drone comes in.Using a Wi-Fi antenna attached to what appears to be a senseFly eBee UAV, it is possible to capture the signal as the drone flies between different points to better map the location of the device and, hopefully, the person it belongs to.

Cheseaux, who worked on the project for his master's degree, says that automatically eliminating weaker signals from the calculations has helped to improve the accuracy of the system, which has been able to locate mobile phones on the EPFL campus with a high degree of accuracy.The EPFL students also developed an interface that allows those on the ground to track the...
"In the best tests we have performed, the place indicated was within 10 m (33 ft)," says Cheseaux, who, being an amateur mountaineer, added, "The drone’s Wi-Fi antenna could be replaced by Avalanche Victim Detectors (DVA) which would enable the rapid and inexpensive deployment of the first avalanche searches."

The project also involved the development an interface that allows those on the ground to track the aircraft in real time. Detected mobile phones are indicated by colored dots on a computer display, with the drone also tightening its flight around a selected device to indicate its position.

Source: EPFL


Inspired USA Bike Trips and Adventure Vacations

Great Freedom
There is great freedom in spinning along on a bicycle and in our view, there is simply no better way to see your world. On a Great Freedom Adventures bike trip, you are not just passing through; you are within every scene you see...engaged with your surroundings and fully connected to the people and the places along the way. Our bicycle trips delight the senses, energize the body, and rejuvenate the soul. This is rich, rewarding travel that imprints memories in our minds, where they can be recalled with joy forever.

Great Adventures
We bring you very special bicycle trips and incorporate hike and kayak adventures to renew your sense of wonder and satisfy your sense of adventure. The locations of our Northeastern USA bike tours have been carefully selected to showcase spectacular scenery in the most culturally and naturally diverse regions, while offering unrivaled bicycling. We bring you superior tours with top quality restaurants and inns offering unsurpassed service, as well as wonderful guides who take good care of you.

Great Freedom Adventures
Freedom to explore, freedom from logistics, planning and worry, freedom to relax and enjoy await you on your Great Freedom Adventure. Come join us for an unforgettable bicycle adventure. Laugh with friends new and old and enjoy the easy camaraderie that develops through shared exertions and experiences. Open yourself to spontaneous moments and delightful surprises that make you feel alive again – that make you feel free.


Despuès del golpe de ayer que me perjudicò la mano izquierda y el costado idem , hoy no podìa salir con la bici por el manejo y por los dolores. Decidì salir a correr segùn estaba, bañador y camiseta tècnica . Muy ràpido para salir, pero despuès de una hora y media conseguì un bonito roce entre los muslos.El recorrido tenìa que ser poco tècnico para evitar los dolores en los saltos.

No hay comentarios: