¡Bienvenidos! Welcome!

I am an Associate Professor in Computer Science at Virginia Tech. I am originally from Río Piedras, Puerto Rico but now reside in the beautiful mountains of southwest Virginia.


My research is in Human-computer interaction. Some areas of HCI that I have studied are in personal information management, information refinding, tools for building interactive systems, digital libraries, use of computers for education, and cultural influence in interface design.

More about my research »


I usually teach HCI graduate courses and some intro courses in our undergraduate program. I also keep most of the content for my courses available on the web. Some of the more recent course even have video podcast of my lectures.

Teaching this Spring 2015: CS 6724 Service Design, Ubiquity and Mobility.

More about my teaching »


I do a lot of service in the department and professionally. I am Vice-President of the board for the non-profit Virginia Network for Latinos in Higher Education (VALHEN), and co-chair of the Coalition to Diversify Computing (CDC).

More about my service »

Current students

This is the short list of my current students. These are the students that I am their advisor of record (in no particular order).

I also work closely with several other students, including Bobby Beaton and Michael Stewart.

More about students »

Social Media

You can find me around the web at these sites... Sorry, some of them are more personal than others and thus blocked from public view.