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This document describes the list of the main accesibility features of this site and how they should be used.

WCAG Level AAA Accesibility Conformance Level AAA

I'm making every effort to ensure that all the information available on this site is accessible to all, so all the documents were designed in conformance with the W3C's WAI Accessibility Level AAA (the highest level possible).

However, if you use special adaptive equipment to access the web and have problems when surfing my site, please contact me and I will give the information that you are looking for in an alternate format. It would be helpful if you can be as specific as possible when describing the problem found, including the browser that you are using and its version.

Quick Access Links

Visually hiden to PC-based Internet browsers but still visible to text-based browsers, PDA (Personal Digital Assistant) and to mobile phone-based browsers, the site includes several Quick Access Links distributed in different zones across each document. They make navigation easier as it is possible to skip large blocks of information jumping from a block to the next one.

Those links may be accesed cycling thorough the list of available links in PC-based Internet browsers (usually by mean of the Tab key) or taping on them in text-based or in PDA-based browsers.

The sections where you will find those Quick Access Links are the following:

  1. At the beginning of each document you will find two links: one will let you skip the document's header jumping into the table of contents (navigation bar) while the second link is used to jump to the contents of the page.
  2. At the beginning of the contents of each document, you will find an small menu with Quick Access Link to the all the different sections of that page.
  3. At the beggining of each section of any document you will find a Quick Access Link to the next section.
  4. At the end of each section of any document you will find a Quick Access Link to the top of the page.
  5. At the end of each document you will find the same links found at its beginning: one of them will return you to the beginning of document's contents, an the other one will allow you to visit the navigation bar. This feature is specially useful in PDA and such kind of small devices, avoiding to use the tiny scroll bars to return to the beginning of each document.

Access Keys

Several links in the site are powered by Access keys. They provide quick access to the main documents of the site. Just pressing the browser's accelerator key in combination with the Access key will allow you to jump to the target link without the usethe mouse or any other kind of pointing device.

The accelerator key used for quick access depends on the Internet browser used. For instance, the accelerator key for Mozilla's Firefox is the Alt + Shift keys. Pressing both Alt + Shift keys plus the h key at the same time would order Firefox to download the home page for this site (as the h key is the Access Key for our home page).

The letter representing the Access Key for each link is overlined.

Access Keys for this site.
Access Key Document Description
t Top of the Document. Skips to the top of the document.
c Contents. Skips to the content area of the current page.
v Navigation. Skips to the navigation bar.
h Home. Latest news and highlights of this site
s Sitemap. Summary of the contents of each page of this site.
o Contact. My courier and e-mail address.
y Accessibility. Access to this document.
r Research. Summary of my recent research work.
d Academics. My classes timetable and advising service.
a Astronomy. Records about my Astronomic Observation.

PDA Friendly PDA friendly logo.

Each document of this site gracefully renders on the small screens of Personal Digital Assistants (PDA) and such kind of portable devices. Although the representation of the information might be slighty different from PC-based Internet browsers (due to the space constraints of those tiny devices) the information displayed is exactly the same.

This web page displayed in Pocket PC device.


Documents on this site are presented in many formats. These formats are generally accessible to users using screen reading software. Some files on this web site may be posted as Adobe Acrobat PDF (Portable Document Format) files. Adobe provides their Acrobat Reader software as a free download.