John Alexis
Guerra Gómez

I do Visual Analytics, i.e., I include the user in the big data analysis/science loop.

john.guerra[~at~]gmail.com
johnguerra.co
PDF Version

In a nutshell

Information Visualization Researcher and Engineer. I help people extract insights from their data using interactive infovis and data science. PhD in Computer Science, Assistant Professor at Uniandes, Remote Lecturer at the Master in Data Science at UCBerkeley. I conduct research on Visual Analytics, Accessibility, Big data, Human Centered Data Science and Web Development

Experience

My Skills

My Skils

The tools and techniques I use

What tools I use

Experience and Education

Things I'm proud of

Uniandes

Berkeley

Yahoo Labs
  • Exploring information visualization interfaces for navigating big repositories of photos.
  • Helped redesigned Flickr stats.
  • Developed and deployed a visualization for better exploring the organizational units that is being used company wide.
  • Modified Flickr code to add a new photo navigation visualization.
  • Four papers accepted in two major conferences (CHI2016 and AVI2016).
  • Created visual analytics for dozens of complex Yahoo datasets.

PARC
  • Created Network Explorer a visual network analytics tool to explore hundreds of thousands of nodes, which was implemented, among others, in a Fraud, Waste and Abuse solution from Xerox and is being used for detecting fraud in Health Care networks.
  • Constructed several dashboards using Tableau.
  • Developed and integrated several other time-based and text based visualizations in 3 different products.

Extras

PhD
  • PhD and MSc in Computer Science under the supervision of Dr. Ben Shneiderman and Dr. Catherine Plaisant at the University of Maryland (2013).
  • Created the StemView a visualization technique that represents 5 characteristics of change in trees.
  • Created the Bullet a visualization glyph that represents 4 characteristics of change in trees.
  • Implemented TreeVersity2 a visual analytics web application to explore change in datasets over time.
  • Implemented TreeVersity a visual analytics desktop application to compare changes between two trees.
  • Conducted 13 case studies with 9 domain experts to validate TreeVersity and TreeVersity2.

Lecturer

DUTO

Things I have built

BTactile

A search engine for tactile images for the blind.


Tweetometro

Twitter monitor and analyzer for different topics


Phototreemap

Representing groups of photos with numeric attributes. Work in progress, pending publication.


Network Explorer

Network Explorer

Visual analytics tool for understanding large networks. Pending publication.


TreeVersity v2

Visualizing five dimensions of change in a dataset changing over time using hierarchies


TreeVersity v1

Comparing changes between trees on structure and node values.


LifeFlow

A visual analytics tool for temporal categorical data. Helped developing the comparison modules as part of a broader project.


IRIS

A system to allow blind children to see colors and shapes with their hands


Much more!

Here is a sample of everything I've been building and doing

Students