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Jac Londe

Internet Census 2012 - 0 views

internetcensus2012.bitbucket.org/paper.html

security telnet scanning internet census 2012 botnet

shared by Jac Londe on 23 Mar 13 - No Cached
  • Internet Census 2012
  • Carna Botnet
  • Abstract While playing around with the Nmap Scripting Engine (NSE) we discovered an amazing number of open embedded devices on the Internet. Many of them are based on Linux and allow login to standard BusyBox with empty or default credentials. We used these devices to build a distributed port scanner to scan all IPv4 addresses. These scans include service probes for the most common ports, ICMP ping, reverse DNS and SYN scans. We analyzed some of the data to get an estimation of the IP address usage. All data gathered during our research is released into the public domain for further study.
Jac Londe

Feed43 : How It Works - 0 views

feed43.com/how-it-works.html

xml rss html feeds feed

shared by Jac Londe on 08 Mar 09 - Cached
  • Jac Londe on 08 Mar 09
     
    Feed43 engine converts free-form HTML or XML documents to valid RSS feeds by extracting snippets of text or HTML by means of applying search patterns, and then joining these snippets together using output templates to form user-friendly content of feed's items. The principle of extracting specific data from source documents is also known as "HTML scraping".
Jac Londe

Amazon Elastic Compute Cloud (Amazon EC2) - 0 views

aws.amazon.com/ec2

web2.0 cloud tags amazon ec2 web3.1 hosting

shared by Jac Londe on 23 Jan 09 - Cached
  • Jac Londe on 23 Jan 09
     
    Amazon Web Services (AWS) delivers a set of services that together form a reliable, scalable, and inexpensive computing platform 'in the cloud'. These pay-as-you-use cloud computing services include Amazon S3, Amazon EC2, Amazon SimpleDB, Amazon SQS, Amazon FPS, and others ." />Amazon Web Services, AWS, S3, EC2, Amazon Simple Storage Service, Amazon Elastic Compute Cloud, Cloud Computing, Web Hosting, Grid Computing, Utility Computing, Amazon Mechanical Turk, Simple Queue Service, SimpleDB, Flexible Payments Service, Amazon Payments, DevPay, Amazon Associates, Alexa, Developer Forum, AWS User Group, Developer Tools, APIs, Web Application Development,
Jac Londe

Explore Google Search - 0 views

www.google.com/searchtips

Google Search

shared by Jac Londe on 13 Apr 10 - Cached
  • Explore Google Search
  • Search is at the heart of everything we do at Google. Our engineers work every day to solve the hardest search problems, and thus improve your online experience. Here's a glimpse at what they do, the features they've built and the remarkable user stories that inspire our work.
  • Jac Londe on 13 Apr 10
     
    Explore Google Search: Movies, weather, public data, earthquake information and more. Check out these 15 second search tips from Google to help you save time and get the most of your online experience.
Jac Londe

NFC Antennas - 1 views

www.antenna-theory.com/...nfc-antenna.php

nfc electronics mobile onde tools science

shared by Jac Londe on 15 Apr 14 - No Cached
  • So NFC is just a method of communication between two devices at short distance. What makes the NFC antenna design simple or easy? If you know much about antennas, the first question you might ask is what is the operating frequency of NFC. It turns out that these devices operate around 13.56 MHz. The corresponding wavelength is 22 meters long - this means to get a nice half-wave dipole antenna (that radiates well) we would need a device about 11 meters in length.
  • he NFC antenna area may be limited to 3"x1" (or 7 cm * 2.5 cm). Hence, we are talking about fitting an antenna i
  • to a volume where the maximum linear dimension is about 0.5% or less of a wavelength. And from antenna theo
  • ...1 more annotation...
  • y, we know that you won't get any radiation out of such a small device.
  • Jac Londe on 15 Apr 14
     
    Longueur d'onde précise.
Jac Londe

Tor Project: Overview - 0 views

www.torproject.org/...overview.html.en

privacy security proxy tools anonymous

shared by Jac Londe on 20 May 12 - No Cached
  • Overview
  • Tor is a network of virtual tunnels that allows people and groups to improve their privacy and security on the Internet. It also enables software developers to create new communication tools with built-in privacy features. Tor provides the foundation for a range of applications that allow organizations and individuals to share information over public networks without compromising their privacy. Individuals use Tor to keep websites from tracking them and their family members, or to connect to news sites, instant messaging services, or the like when these are blocked by their local Internet providers. Tor's hidden services let users publish web sites and other services without needing to reveal the location of the site. Individuals also use Tor for socially sensitive communication: chat rooms and web forums for rape and abuse survivors, or people with illnesses.
Jac Londe

USB On-The-Go - 0 views

www.usb.org/onthego

USB otg mobile hardware electronics arduino Web2.0 opensource tools

shared by Jac Londe on 06 Aug 12 - Cached
  • USB On-The-Go and Embedded Host Virtually every portable device now uses USB for PC connectivity. As these products increase in popularity, there is a growing need for them to communicate both with USB peripherals and directly with each other when a PC is not available. There is also an increase in the number of other, non-PC hosts (Embedded Hosts) which support USB in order to connect to USB peripherals.
Jac Londe

Two military spy telescopes, just as big and powerful as Hubble, donated to NASA - 0 views

www.zmescience.com/...spy-telescopes-for-nasa-432432

military spy telescopes hubble nasa view

shared by Jac Londe on 05 Jun 12 - No Cached
  • Two military spy telescopes, just as big and powerful as Hubble, donated to NASA
  • The telescopes were built by private contractors for the National Reconnaissance Office, one of 16 U.S. intelligence agencies. Each have 2.4-meter (7.9-foot) mirrors, just like the Hubble, but they have 100 times the field of view.
  • the telescopes, built in the late 1990s and early 2000s, are now technologically outdated, at least for intelligence operations, despite being just as powerful as Hubble. Now that something that’s worth taking into consideration. Moreover, these telescopes worth hundreds of millions of dollars have never seen operation! Instead they’ve been shelved in a warehouse somewhere, of course, classified. And they might find themselves, yet again, blocked in a warehouse, since NASA, on a string budget, doesn’t have the necessary cash to fit them.
Jac Londe

PSTN ::: Public switched telephone network ::: Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...lic_switched_telephone_network

pstn public wikipedia network telephone

shared by Jac Londe on 15 Sep 10 - Cached
  • Public switched telephone network
  • is the network of the world's public circuit-switched telephone networks. It is a worldwide network of telephone lines, fiberoptic cables, microwave transmission links, cellular networks, communications satellites, and undersea telephone cables connected by switching centers, which allows any telephone in the world to communicate with any other. Originally a network of fixed-line analog telephone systems, the PSTN is now almost entirely digital in its core and includes mobile as well as fixed telephones.
  • (PSTN)
  • ...1 more annotation...
  • The technical operation of the PSTN utilises standards created by the ITU-T. These standards allow different networks in different countries to interconnect seamlessly. There is also a single global address space for telephone numbers based on the E.163 and E.164 standards. The combination of the interconnected networks and the single numbering plan make it possible for any phone in the world to dial any other phone.
Jac Londe

XE.com - Free Currency Charts (CNY/USD) - 0 views

www.xe.com/currencycharts

free currency taux change monnaie

shared by Jac Londe on 06 Oct 10 - No Cached
  • XE Free Currency Charts lets you build a chart with your chosen currencies. Pick your currency pair to see the currency history. These currency charts use live mid-market rates, are easy to use, and are very reliable.
Jac Londe

Scripting News: WikiLeaks on the run - 0 views

scripting.com/...wikileaksOnTheRun.html

twitter power Google Tweet wikileaks news scripting

shared by Jac Londe on 03 Dec 10 - No Cached
  • ikiLeaks says you can find them through wikileaks.ch, which redirects to a dotted ID. People exchange this information on Twitter. So in a weird sneaker-net sort of way we have implemented a human DNS.
  • All the while there's a huge glaring 800-pound-gorilla elephant-in-the-room size contradiction. The pols say that businesses can't support WikiLeaks, but the Guardian and the NY Times and the newspapers in Pakistan, Indonesia, Israel -- all over the world -- they're businesses too. So if they're really serious about this, we're in First Amendment territory. They ought to be careful, because the politicians depend on these businesses to sell their product. Without them, they have no way to lie to us.   See the problem isn't that WikiLeaks is lying, the problem is that they're telling the truth. This is not business as usual. 
  • It seems to me that at the end of this chain is BitTorrent. That when WikiLeaks wants to publish the next archive, they can get their best practice from eztv.it, and have 20 people scattered around the globe at the ends of various big pipes ready to seed it. Once the distribution is underway the only way to shut it down will be to shut down the Internet itself.
Jac Londe

Contenu musical d'un signal audio - 0 views

tel.archives-ouvertes.fr/...fr

these audio sons musique accords harmonie ONDE

shared by Jac Londe on 23 Dec 10 - No Cached
  • enu musical d'un signal audio
  • Estimation conjointe d'information de contenu musical d'un signal audio
  • Dans cette thèse, nous nous intéressons au problème de l'extraction automatique d'informations de contenu d'un signal audio de musique.
  • ...1 more annotation...
  • Nous nous concentrons sur trois descripteurs musicaux liés aux structures harmoniques, métriques et tonales d'un morceau de musique. Plus précisément, nous cherchons à en estimer la progression des accords, les premiers temps et la tonalité. L'originalité de notre travail consiste à construire un modèle qui permet d'estimer de manière conjointe ces trois attributs musicaux. Notre objectif est de montrer que l'estimation des divers descripteurs musicaux est meilleure si on tient compte de leurs dépendances mutuelles que si on les estime de manière indépendante.
Jac Londe

Troubled Times: Hand Crank - 0 views

www.zetatalk.com/...tengy05n.htm

electricity handpower onde wave

shared by Jac Londe on 28 Aug 11 - Cached
  • The unit is light weight (2.5 lb), portable, low cost ($10-$20) and can be used to recharge single cell batteries at from 1-3.5 amps. It can be made from a cordless electric drill in a primitive environment. The simplest way of how to make a hand crank DC generator using a standard 12, 14.4 or 18 Volt Cordless drill
  • With no modification hook an alligator clip jumper to the two charging terminals (on the bottom that the battery plugs into). See picture below. Note that when a 14.4 Volt drill is laid down pointing to the left then the upper terminal is most likely to be the plus and the lower terminal the minus for these units.
Jac Londe

A breakthrough on paper that's stronger than steel - 0 views

www.physorg.com/...ough-paper-stronger-steel.html

science graphite paper graphene

shared by Jac Londe on 26 Apr 11 - No Cached
  • paper that's stronger than steel
  • University of Technology, Sydney scientists have reported remarkable results in developing a composite material based on graphite that is a thin as paper and ten times stronger than steel.
  • Graphene paper (GP) is a material that can be processed, reshaped and reformed from its original raw material state - graphite.
  • ...1 more annotation...
  • These graphene nanosheet stacks consist of monolayer hexagonal carbon lattices and are placed in perfectly arranged laminar structures which give them exceptional thermal, electrical and mechanical properties.
Jac Londe

Researchers create super-small transistor, artificial atom powered by single electrons - 0 views

www.physorg.com/...r-artificial-atom-powered.html

science nano Sketchset

shared by Jac Londe on 27 Apr 11 - No Cached
  • Researchers create super-small transistor, artificial atom powered by single electrons
  • The SketchSET—which is the first single-electron transistor made entirely of oxide-based materials—consists of an island formation that can house up to two electrons. The number of electrons on the island—which can be only zero, one, or two—results in distinct conductive properties. Wires extending from the transistor carry additional electrons across the island.
  • One virtue of a single-electron transistor is its extreme sensitivity to an electric charge, Levy explained. Another property of these oxide materials is ferroelectricity, which allows the transistor to act as a solid-state memory. The ferroelectric state can, in the absence of external power, control the number of electrons on the island, which in turn can be used to represent the 1 or 0 state of a memory element. A computer memory based on this property would be able to retain information even when the processor itself is powered down, Levy said. The ferroelectric state also is expected to be sensitive to small pressure changes at nanometer scales, making this device potentially useful as a nanoscale charge and force sensor.
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.
  • ...4 more annotations...
  • 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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