More courses on the web

It’s been a while since the emergence of university courses on the web. Currently, almost all major universities maintain projects regarding on line courses such as Open Course Ware provided by MIT and Open Yale Courses, by Yale University.

In these projects, at first, only written material such as student’s notes and exercises were provided. However, with the arise of video distribution through the web, it didn’t take long before cameras were used to record the classes and make the videos available on the web.

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Hello World with Arduino

In 2005, I came across a project called Arduino, which drew my attention since it was a project of open source hardware. At the same year, I tried to assemble one but I ended leaving the project aside due to the college activities. Today, I regret I haven’t dedicated more some time to this project in the past, given the way it grew.

For those who don’t know, Arduino is a project composed by hardware and software for the development of applications which interact with the real world using sensors and actuators. It was conceived to permit the creation of projects by people who don’t have much knowledge on hardware or electronics such as hobbyists, artists and designers.

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Python for scientific applications – the very basics

Lately, I’ve been studying a little about Python and the more I learn the more I become interested about this language. It was the first time I had contact with a language that uses dynamic typing and since the first time I used it, I had the impression it could be a good replace for Matlab. I like Matlab, but the fact of being proprietary and not being a general-purpose language makes Python a better solution for me.

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Organizing with Emacs Org-Mode

Another interesting Emacs mode is Org-Mode. It permits to make annotations and manage to-do lists and projects using text files with some special marks.

The marks as interpreted by Emacs, so that it separates the various parts of the text, which facilitates obtaining information. It is possible to organize an agenda with appointments set up on specific dates and also tasks without due dates. With every agenda item, it is possible to associate tags, which can be used to filter search results. These features make Org-Mode a good resource for those who use GTD. For those who don’t know GTD, it is worth to take a look. It was proposed by David Allen and is described in the book “Getting things done”. A brief description of the method can be seen on this presentation which was given at Google and on this reference card.

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Emacs and AUCTEX to edit LaTeX documents

Some years ago, one of the problems I had when I was migrating my desktop to GNU/Linux was finding a development environment for LaTeX. For those who don’t know LaTeX, it’s worth checking out. It is a “document preparation system” widely used for producing mathematical and scientific texts due to its high typographic quality.

By the time I was using MS Windows, I used TeXnicCenter to edit LaTeX projects. Despite its limitations, it did its job well done. On GNU/Linux, I initially tried the Kile editor. Although I consider it an excellent editor, I missed a basic feature: spell correction on the fly (those red marks that are shown under the words when they are spelled incorrectly). Perhaps I had this problem because I was trying to use Kile with GNOME as it was originally developed to be used with KDE.

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