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15 items tagged "wave"
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11:30
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Hack a Day
Some people don’t mind missing a finger or two, but we’re quite attached to all of ours. That’s why we’ve never held on to the fireworks after lighting the fuse. [Dzl] and his son wanted to be (at least somewhat) safe while still having that kind of fun. So they built this rig which lets [...]
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7:01
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Hack a Day
This installment of Retrotechtacular looks at a video lecture that is much more substantive than the usual fare. [Dr. J.N. Shive] was a researcher at Bell Labs at a time when just about every technological breakthrough was coming from that singular collection of minds. This video, called Similarities of Wave Behavior, was made to help [...]
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5:01
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Hack a Day
[Gregory Charvat] continues to have a great time testing out radar systems. He and a friend have pointed the radar out the garage door and are using it to see who can reach a high running velocity. The last time we looked in on [Greg's] work he had acquired an old police radar unit and [...]
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21:28
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SecDocs
Authors:
Bruno Goncalves Rob Havelt Tags:
WiFi Event:
Black Hat DC 2011 Abstract: The new 802.11p standard aims to provide reliable wireless communication for vehicular environments. The P802.11p specification defines functions and services required by Wireless Access in Vehicular Environments (WAVE) conformant stations to operate in varying environments and exchange messages either without having to join a BSS or within a BSS, and defines the WAVE signaling technique and interface functions that are controlled by the 802.11 MAC. Wireless telecommunications and information exchange between roadside and vehicle systems present some interesting security implications. This talk will present an analysis of the 802.11p 5.9 GHz band Wireless Access in Vehicular Environments (WAVE) / Dedicated Short Range Communications (DSRC), Medium Access Control (MAC), and Physical Layer (PHY) Specifications of this protocol. We will present methods of analyzing network communications (GNU Radio/USRP, firmware modifications, etc.), and potential security issues in the implementation of the protocol in practical environments such as in toll road implementations, telematics systems, and other implementations.
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14:01
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Hack a Day
What do you do when you’ve got three broken function generators? Build your own, obviously. Since your workshop has already gone through three of these bad boys, you might find yourself repairing your build. Better not use any fancy ICs and go with a transistor only build. When [Miroslav] sent in his ‘guerilla homebrew’ square [...]
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7:00
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Hack a Day
Although virtual reality was the wave of the future in the early 90′s, it hasn’t really taken off the way we would have liked. Sometimes a great idea just takes time for the technology to catch up to it (Aeolipile anyone?). Now that tiny projectors, realistic FPS games, and eye tracking systems have come down [...]
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5:05
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Hack a Day
The tabulaRasa is a digital wave table oscillator, and features control of frequency, wave table selection, and interpolation. The device is split up into 2 parts. One is a pcb with a healthy amount of resistors, 3 potentiometers, ST TL074 JFET op amp, atmega328 and a SD socket. The second part is software for your [...]
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9:43
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Hack a Day
This track is awful, someone skip it! This project does just that with a wave of your hand. A laser beam shines across a room and, when obstructed, it sends a command to an iPod. One wave pauses playback, two waves skips to the next track, and a constant obstruction jumps backward one track.
They’re using [...]
0day.today (was: 1337day, Inj3ct0r, 1337db)
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