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Jac Londe

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

www.physorg.com/...ollab-transmits-terahertz.html

japan data waves onde science

shared by Jac Londe on 28 Nov 11 - No Cached
  • 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
  • ...1 more annotation...
  • 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

AVG Antivirus and Security Software - Virus Removal - 0 views

www.avg.com/us.virus-removal.ndi-67762

virut virus

shared by Jac Londe on 16 Aug 09 - Cached
  • Jac Londe on 16 Aug 09
     
    Antivirus and internet security protection for home and business. 24/7 support and high-speed automatic updates. Products ranging from maximum protection, to basic antivirus protection available for free download.
Jac Londe

Usb2.0 High Speed Uvc Driverless 2m Fix Focus Cmos Camera Module For Mobile Phone - Buy... - 0 views

www.alibaba.com/...High_Speed_UVC_Driverless.html

usb focus cmos camera module mobile mobile phone phone product

shared by Jac Londe on 15 Nov 12 - No Cached
  • Specifications 1. UVC Driverless 2. 2MP Fix Focus Model NameUM2BU 2M Fix Focus CMOS Camera ModuleInterfaceUSB CMOS CameraResolution2.0 MegapixelFocus TypeFix FocusUVCYesMicrophoneNoEffective Distance30cm to infinityF No.F 2.8View Angle59.9( FOV )Frame Rate30 fpsDimension38mm(L) X 9.8mm(W) X5.46mm(H)OS SupportedWindows XP, Vista, Windows 7,Linux Kernel 2.6 MAC OS 10 or above
Jac Londe

Grundig G2 Reporter | The Eton Webstore - 0 views

www.shopetoncorp.com/...ETO+NG2B

grundig reporter g2 radio mp3 ebook am fm txt SD recorder tools mobile

shared by Jac Londe on 07 Nov 12 - No Cached
  • Grundig G2 Reporter
  • AM-FM-SW-Radio/Recorder Features Digital AM/FM/SW radio with Signal Strength Indicator 248-station Memory Storage 5 Tuning Methods: Jog Tuning, Manual, Auto Tuning, Memory, ATS (Auto Tuning Storage) MP3 and WMA Decode and Recording, E-Book TXT Support Dual Stereo Speakers with Digital Volume Control Record Functions: MIC Record, Line-in Record, Record Radio (able to record while playing) Sleep Timer and Alarm Clock Functions Multiple Language Selection Built-in Flash Memory (4GB) Built-in micro-SD Card Reader (supports up to 16GB) Upgradable Firmware Ports: 3.5mm headphone output, Line-In, MIC, MINI-USB 2.0 Jack (High Speed) Rechargeable Lithium Battery (1250mAh), Charge Through USB Dimensions: 7½" W x 3½" H x 0.8" D (190 x 90 x 21 mm) Weight: 9.6 oz. (272 g)
Jac Londe

Metre - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Meter

metre wikipedia unitesla onde

shared by Jac Londe on 06 May 12 - Cached
  • Metre From Wikipedia, the free encyclopedia   (Redirected from Meter) Jump to: navigation, search This article is about the unit of length. For other uses of "metre" or "meter", see meter (disambiguation). 1 metre = SI units 100 cm 1000 mm US customary / Imperial units 3.2808 ft 39.370 in The metre (meter in the US), symbol m, is the base unit of length in the International System of Units (SI). Originally intended to be one ten-millionth of the distance from the Earth's equator to the North Pole (at sea level), its definition has been periodically refined to reflect growing knowledge of metrology. Since 1983, it has been defined as "the length of the path travelled by light in vacuum during a time interval of 1 ⁄ 299,792,458 of a second.[1]
Jac Londe

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

en.wikipedia.org/...Tesla_(unit)

tesla unit wiki onde science electrons electra électricité magnétisme

shared by Jac Londe on 28 Nov 11 - Cached
  • 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

Cortex-A8 Processor - ARM - 0 views

www.arm.com/...cortex-a8.php

processor arm cortex A8 electronics allwinner mobile hardware arduino tools cpu

shared by Jac Londe on 06 Aug 12 - No Cached
  • Cortex-A8 Processor (View Larger Cortex-A8 Processor Image)The ARM Cortex™-A8 processor, based on the ARMv7 architecture, has the ability to scale in speed from 600MHz to greater than 1GHz. The Cortex-A8 processor can meet the requirements for power-optimized mobile devices needing operation in less than 300mW; and performance-optimized consumer applications requiring 2000 Dhrystone MIPS.
Jac Londe

Hot Sales!wifi Wireless Hard Disk - Buy Wifi Wireless Hard Disk,16gusb Flash Drive,32g ... - 0 views

www.alibaba.com/...s_wifi_wireless_hard_disk.html

wifi wireless flash drive usb drives disk

shared by Jac Londe on 07 Aug 12 - No Cached
  • Wifi Wireless USB Flash drive
  • 1.Battery: 2000mah(about 4H)2.Hi-speed USB 2.03.Mini 5Pin USB interface4.Wifi Wireless Standards: IEEE 802.11b/g/n5.Frequency: 2.4GHz6.Supported Devices,iPad, iPhone, or iPod touch device.Android OS Devices(Tablet, TV, Phone)Smart Phone7.Working Platform:WINDOWS ME/2000/XP/MAC OS/LINUX or later8.Charging while using9. Storage: 16GB-32GB
Jac Londe

Daedalus Projects - 0 views

www.daedalus.nu

projects daedalus science tools copter

shared by Jac Londe on 30 Apr 11 - No Cached
  • CrazyFlie flight video
  • The copter itself is organised around the main CPU. The job of this CPU is to acquire the physical measurement given by the gyroscopes and accelerometers and to control the motors to keep the copter stable. This is done by a regulation loop which controls the motors speed 250 times per second. The radio communication has a pretty low bandwidth and is used to send commands to the copter and receive telemetry data from it. The CPU program can be updated by radio.
  • The computer runs control and telemetry programs. The control program reads the input from a game-pad and sends control commands to the copter. We also have programs that can configure the copter regulation parameters and log the measurements in order to make easier to tune the regulation. All the development is done on Windows and Linux. Indeed we are 3 to work on this project, two of us work on Linux and one is mainly on Windows. Using FLOSS permit to handle that in a very effective way. We are mainly using the GCC compiler from CodeSourcery for the copter program compilation, GNU Make for the project build, Mercurial for the source control, and python/pyusb for the communication with the copter. All these softwares works seamlessly on both Linux and Windows and made the project pretty easy to handle. The distance between the motors (horizontally and vertically) is around 8 cm and the total weight is around 20 g.
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  • The top of the board contains the sensors and the control/communication electronic: The JTAG/Serial connector permit to program the processor and to communicate debug messages. The Main CPU is a STM32 Cortex-M3. It is clocked at 64MHz from the internal oscillator. The 2 Axis X-Y Gyro is an invensense IDG500. It has an analog output and thus is connected to the CPU analog to digital converters. The 1 Axis Z gyro is an invensense ISZ500. As the X-Y gyro this is an analog chip connected to the CPU analog to digital converters. The 2.4GHz Radio is based on a nRF24L01+ chip from Nordic Semiconductor. It is actually a breakout board sold by SparkFun. The radio is connected to the CPU via a SPI port. The 3 Axis Accelerometer is a SMB380 from Bosch. It is connected to the CPU via an I²C bus.
  • Here nothing particular, except that the little battery is taped on the bottom of the copter. The battery comes from a Silverlit x-twin plane and actually permit 4.5min of flight time.
  • Under the battery we mostly have power supply and the “power” electronics: The charge connector accepts 5V and permits to charge the battery The power switch permits to power the copter either from the charge connector or from the battery. The 5V step-up permits to increase the power voltage from the 3~4V coming from the battery to 5V. The two 3.3V linear regulators, reduces the 5V to power the copter electronic. The digital and analog 3.3V are generated independently. This was made to reduce the noise on the analog components (here it is the two gyros, a quite critical part). Finally at the four sides we have the motors transistors. The power for the motors pass on the top and bottom of the part of PCB that hold the motors. It can be noted that we also have the battery charging chip just at the right of the 3.3V regulators. It is a classical MAX1555 and is working pretty well. The idea with the step-up was to get a more stable voltage when the battery is depleted and also to remove some of the noise coming from the motor electonic. Anyway, this boars is capable to work without by using 2.8V linear regulators instead. So most likely the step-up will be excluded on the next version and we also plan to integrate the radio on board. The motors and propellers are taken from a Silverlit X-twin plane. They are powered by the battery voltage.
  • The copter is controlled via a python program running on the PC. A Playstation bluetooth gamepad is used to pilote it.
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