Physics
Video: David Gross: The Coming Revolutions in Theoretical Physics
Talks about force theory of unification, string theory and supersymmetry. And easy and entertaining watch.
Physics
Gyro Cube that would that never needs Euler-ed
Notice the low speed wheels that do the balance compensation.
The Cubli is a 15 × 15 × 15 cm cube that can jump up and balance on its corner. Reaction wheels mounted on three faces of the cube rotate at high angular velocities and then brake suddenly, causing the Cubli to jump up. Once the Cubli has almost reached the corner stand up position, controlled motor torques are applied to make it balance on its corner. In addition to balancing, the motor torques can also be used to achieve a controlled fall such that the Cubli can be commanded to fall in any arbitrary direction. Combining these three abilities — jumping up, balancing, and controlled falling — the Cubli is able to 'walk'.
Lead Researchers: Gajamohan Mohanarajah and Raffaello D'Andrea
This work was done at the Institute for Dynamic Systems and Control, ETH Zurich, Switzerland and was funded in part by the Swiss National Science Foundation (SNSF),
Environment
Self evident – There has been no change in sea level
Black and white portion of this gif is from 1871.
Computing
Linux Releases
I found it quite inconvenient that later releases of Linux do not fit on a CD. Thus I went searching for the latest release that would fit. I found the following page with the releases:
Research links
- Ubuntu Releases
- Ubuntu 12.04.3 LTS (Precise Pangolin) – this relatively young release fit on a CD
Communication
OpenVoIP: An Open Peer-to-Peer VoIP and IM System
Welcome to OpenVoIP, an open source peer-to-peer VoIP and IM system of ~1000 nodes running on ~300 PlanetLab machines. OpenVoIP runs Peer-to-Peer Protocol (P2PP) which can be used to implement well-known DHTs or unstructured protocols. Unlike OpenDHT, where it was only possible to put/get the data, we allow non-PlanetLab nodes to become part of our overlay. This means that you can download the P2PP executable for Windows XP, Linux, or OpenWengo-P2PP SIP phone and connect to our overlay. Your node will provide routing and storage services to the overlay.
This software project appears to be in the experimental phase.
Computing
Setting up Port Forwarding on AT&T Uverse Modem
Research Links
- Setting up port forwarding AT&T Uverse
- When is port forwarding necessary?
- Port forwarding tool
- UVerse Router Admin Page: http://192.168.1.254/
Computing
Onion Pi Tor Router made with Raspberry Pi
It appears to me this would be good if you wanted to run an open router and try to protect yourself from what users may do on via your router.
Research Links
- Adafruit: Onion Pi kit
- Adafruit: What you will need
- Ebay: Onion Pi – Price = 150 ( markup of 60 USD)
- Adafruit: Setting up the middle box
- Anonymizing Middlebox
Notes
- You'll still need to set up the access point and Tor software according to our tutorial. This project is best used by people with a little bit of command-line, linux or Raspberry Pi experience. If you've set up a Raspberry Pi and configured it before, this project will be a fun experience.