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Jac Londe

Chrome Experiments - "Magic Dust" by Mr.doob - 0 views

  • Chrome Experiments Not your mother's JavaScript
  • Magic Dust August 02, 2012
Jac Londe

Chrome Experiments - "Traveling Wavefronts" by Felix Woitzel - 0 views

  • Chrome Experiments Not your mother's JavaScript.
  • Traveling Wavefronts
Jac Londe

Japan collab transmits record data speeds on terahertz waves - 0 views

  • Japan collab transmits record data speeds on terahertz waves
  • Researchers from Japan-based semiconductor manufacturer Rohm, together with a team from Osaka University, have come up with a chip that, in experiments, has achieved a wireless data transmission speed of 1.5 gigabits per second. This is a record breaker as the world's first terahertz wireless communication achieved with a small semiconductor device. The chip’s ability to transmit at such a quick speed is not the end of the story. Even higher transmission speeds of up to 30 Gbps may be possible in the future, according to reports.
  • “Research into terahertz technology utilising Terahertz frequency (100GHz-10THz) is now receiving increasing attention around the world,” according to an Osaka University publication
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  • One limitation on terahertz equipment has said to be its suitability only for indoor applications due to its vulnerability to interference from the atmosphere.
Jac Londe

Encyclopédie de L'Agora | Henry David Thoreau - 0 views

  • Henry David Thoreau
  • Lorsque les Puritains arrivèrent en Amérique du Nord, c’est tout naturellement que, profondément imprégnés de langage biblique, ils assimilèrent leur entreprise à la traversée du désert des Israélites, à une errand into the wilderness qui faisait d’eux des envoyés ou messagers dans la nature sauvage, symbole de la mise à l’épreuve qui devait permettre de recouvrer la pureté de la foi. La nature était ainsi fermement encadrée dans un paradigme providentialiste qui suffisait à lui donner sens. Dans cette perspective, elle apparaissait comme un lieu sauvage que l’homme avait pour mission de domestiquer et de rendre productif, par un processus de réforme ou d’amélioration (improvement) qui ferait de ces "solitudes hurlantes" (howling wilderness) la terre promise qu’était appelé à être le Nouveau Monde.
Jac Londe

QR Voice - 0 views

Jac Londe

Tesla (unit) - Wikipedia, the free encyclopedia - 0 views

  • A particle carrying a charge of 1 coulomb and passing through a magnetic field of 1 tesla at a speed of 1 meter per second perpendicular to said field experiences a force of 1 newton, according to the Lorentz force law. As an SI derived unit, the tesla can also be expressed as (in SI base units).[3] Units used: A = ampere C = coulomb kg = kilogram m = meter N = newton s = second T = tesla V = volt Wb = weber [edit] Electric vs Magnetic Field
  • The difference between magnetic field strength (in tesla) vs electric field strength can be confusing.[citation needed] The difference is that a force of magnetic field on a charged particle is generally due to the charged particle's movement[4] while the force imparted by an electric field on a charged particle is not due to the charged particle's movement. This can be seen by looking at the units for each. Electric field is N/C, while magnetic field (in tesla) can be written as N/(C*m/s). The difference between the two is m/s, or velocity. This can further be seen by noting that whether a field is magnetic or electric is dependent on one's relativistic reference frame (that is: one's velocity relative to the field).[5][6] In ferromagnets the movement creating the magnetic field is the electron spin[7] (and to a lesser extent electron orbital angular momentum). In current carrying wire (electromagnets) the movement is due to electrons moving through the wire (whether the wire's straight or circular).
Jac Londe

Wikileaks : La guerre secrète - 0 views

  • Geoff Morrell, porte-parole du Pentagone prie Wikileaks de rendre les documents qu’il a en sa possession et d’effacer toutes les copies qu’il a pu en faire. Il ira jusqu’à menacer l’organisation en disant à présent que Julian Assange doit bien se comporter et qu’il doit rendre ce qu’il a volé, mais que s’il refuse, ils trouveront bien une autre alternative pour l’obliger à plier. Il n’y va pas dans la demi-mesure et c’est bien la première fois qu’un dirigeant menace quelqu’un en public, devant un parterre de journalistes.
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    Que savons-nous ? Que savons-nous vraiment ? Que voulons-nous savoir ? Voilà la réelle question.
Jac Londe

Sphère de Bloch - Wikipédia - 0 views

  • La sphère de Bloch, du nom du physicien et mathématicien Félix Bloch, est une représentation géométrique d'un état pur d'un système quantique à deux niveaux ; c'est donc, entre autres, une représentation d'un qubit. Il est possible de généraliser la construction de cette sphère un à un système à n niveaux.
Jac Londe

INFORMATIQUE2012 | Scoop.it - 0 views

  • “Informatique Geek Portable Tablette Mobile Camera Appareil Photo”
Jac Londe

Asus Padfone Unlocked Available (Full Specifications) - 0 views

  • ASUS lifted the veil over its long-awaited redesigned 9.2mm thin PadFone at the MWC. Sporting a 4.3-inch Super AMOLED qHD display, Snapdragon S4 with the new Adreno 225 GPU, and 8MP camera with LED flash and f/2.2 aperture, as well as 16-64GB of internal storage plus microSD slot, it has what we would expect from a modern high-end. Connectivity is taken care of 42Mbps HSPA+ radio, Wi-Fi, Bluetooth 4.0, HDMI and A-GPS, while a 1,520mAh battery unit is included as a juicer. The Padfone can get inserted into an optional tablet frame, whose 10.1 inch screen then gets powered by the phone itself, and can extend your battery life significantly. There is another dock, which allows you to add a detachable keyboard accessory, like on the Transformer Pad series. This one also comes with a stylus that except for doodling can be used to receive your phone calls as well, considering that the phone is inserted in the mothership.
Jac Londe

620325 Stirling Engine - ABRA Electronics Inc. - 0 views

  • The 620325 Stirling Engine by Thames and Kosmos uses renewable energy from the sun to drive a generator, which charges a rechargeable battery to power an electric car.
  • Power a Car with Solar Generated Electricity       Discover the Stirling engine, a simple, clean and efficient energy technology that is quickly becoming a viable source of electricity as the availability of fossil fuels declines. The Stirling engine in this kit uses renewable energy from the sun to drive a generator, which charges a rechargeable battery to power an electric car. Named after its inventor, Robert Stirling, the original Stirling engine dates back almost 200 years. Today, high-tech Stirling engines are being used in arrays of giant mirrored solar collectors and common applications like compact generators. NASA is even working on using Stirling engines to power a human outpost on the moon!Like a steam engine, a Stirling engine is a heat engine that converts heat energy into mechanical work, usually to drive a generator that then converts the mechanical energy into electricity. But instead of water and steam, the Stirling engine uses a permanently enclosed volume of gas, such as air or helium, to perform the mechanical work. Stirling engines are highly efficient, can operate very quietly, and can use many different sources of heat: combustion of fuels, nuclear fission, geothermal, or solar heat, as this model uses. The Stirling engine in this kit is located in acharging station with a mirrored parabolic dish. The dish focuses the sun’s rays onto the cylindrical glass bulb of the Stirling engine to heat it up. The air inside the bulb heats up and pushes a piston, which turns an electric generator. The generator produces electricity that charges a rechargeable battery in the car. The car runs on an electric motor powered by the battery.The kit includes the charging station with a beta type Stirling engine, the electric car, and a full-color, 64-page manual.
Jac Londe

U49325 Sun Runner Stirling Engine - ABRA Electronics Inc. - 0 views

  • The U49325 Sun Runner Stirling Engine is a solar-powered Stirling Engine which offers a dramatic demonstration of energy conversion.   This motor and its parabolic mirror can be attached to any conventional camera tripod. When properly aimed at the sun, the polished aluminum parabolic mirror focuses incoming solar energy on the heat cap of the engine, which is converted to rotary motion. Unit comes complete with motor, parabolic mirror, and wrenches. Standard camera tripod is not supplied. This engine is completely assembled and ready to run. Each unit is test run at the factory prior to shipping. Motor runs at 2,000 RPM and up. This engine can also run as a horizontal engine with an alcohol burner. Demonstrate this exciting method of harnessing the sun’s clean and renewable energy to your students.  Weight: 6.00 lbs Dimensions: Engine: 8.25 x 3 inches (L x W) Flywheel: 3.25 inchesParabolic Mirror: 18 inch diameterPlease note that this item is designed to demonstrate the operating principles of a Stirling engine for educational use and is not designed for power production.  It can potentially be coupled with a generator for producing very small amounts of electricity but is incapable of powering anything beyond a small light bulb or LED.
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