Cheap Ball Casters for Small Robots

Hello everyone! :) In the title of this blog I mention that it is also about robotics. However, and to be honest, I've realized that I haven't posted much stuff about it. I hope to fix that in the following posts since recently I've finally finished some robot projects that I have been doing in the past months. Unfortunately I can't publish them yet. Maybe in a month or two :) Anyway, I'll start with a simple post regarding a simple but very useful part for small robots: ball casters!
You can buy ball casters from several robotics shops online and they're not the most expensive thing on earth. However, there are other options that can be cheaper and will save you from the waiting until you receive the ball casters that you may order from shops online. Some of the options fit in the spirit of Green Robotics, which is the idea of reusing and recycling everyday things to make robots. I'm going to show you three options that may suit your needs :) .

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I'll start with the option that I think to be the best of the three that I'm going to talk about. See the shiny metal balls stuck in a white plastic piece? They look really good, don't they? :)

How to Install LibreOffice 4.0 in Ubuntu 12.04

Hi there! I don't know if you've heard about it but this week we had some great news for the open source community and Linux: LibreOffice 4.0 has just been released. :) I'm not going to describe all the new features and improvements since you'll get a better glance at them by visiting the release notes. I'll just point out four of them which I think to be the most significant:

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  1. Better interoperability - Interoperability with other file formats is a very important feature for any user and a critical one for enterprise users;
  2. Remote control Android app for presentations - a month ago I was just discussing with my brother how this would be cool to do and gladly the LibreOffice development team made it a reality. Now you can control and view the presentations simultaneously in your Android phone or tablet;
  3. Preetier User Interface - it now supports Firefox Themes. Now you can customize the looks of your Libreoffice instalation;
  4. Better Performance - faster, faster and... did I already say faster?