ABOUT ME

My name is Ha Le and I’m a third year PhD student in Computer Science at Northeastern University. My research areas are HCI and Ubiquitous and Wearables Computing. Particularly, I worked on multimodal data annotation interfaces for human activity and behavioral recognition. I combined different device form factors, input modalities and sensors to design software that empower people to monitor their data and train their own machine learning models.

I received my Bachelor degree in Mathematics and Computer Science from Gustavus Adolphus College in 2022. During my 4 years at Gustavus, I did research under the supervision of Prof. Louis Yu, Jillian Downey and Jacob Siehler.

PUBLICATIONS

An Evaluation of Temporal and Categorical Uncertainty on Timelines: A Case Study in Human Activity Recall Visualizations
In 2025 IEEE Visualization and Visual Analytics (VIS’25)
Veronika Potter, Ha Le, Uzma Haque Syeda, Stephen Intille and Michelle Borkin

Feasibility and Utility of Multimodal Micro Ecological Momentary Assessment on a Smartwatch
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI’25)
Ha Le, Veronika Potter, Rithika Lakshminarayanan, Varun Mishra, and Stephen Intille
[link][pdf]

Collecting Self-reported Physical Activity and Posture Data using Audio-based Ecological Momentary Assessment
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT’24)
Ha Le, Rithika Lakshminarayanan, Jixin Li, Varun Mishra, and Stephen Intille
[link][pdf]

Detecting Sleep Disruptions in Adolescents Using Context-sensitive Ecological Momentary Assessment: A Feasibility Study
Proceedings of the 18th EAI International Conference on Pervasive Computing Technologies for Healthcare (PervasiveHealth’24)
Rithika Lakshminarayanan, Arushi Uppal, Ha Le, James C. Spilsbury and Stephen Intille
[pdf]

mHealth-Based Just-in-Time Adaptive Intervention to Improve the Physical Activity Levels of Individuals With Spinal Cord Injury: Protocol for a Randomized Controlled Trial
JMIR Research Protocols
Rachel L Carey*, Ha Le*, Donna L Coffman, Inbal Nahum-Shani, Mohanraj Thirumalai, Cole Hagen, Laura A Baehr, Mary Schmidt-Read, Marlyn S R Lamboy, Stephanie A Kolakowsky-Hayner, Ralph J Marino, Stephen S Intille, Shivayogi V Hiremath
[link]

A Feasibility Study on the Use of Audio-based Ecological Momentary Assessment with Persons with Aphasia
Proceedings of the 25th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS’23)
Jack Hester, Ha Le, Stephen Intille, Erin Meier
[link]

Relating Consistent Improvement to Overall Performance in a Calculus I Course that Utilizes Standards-Based Grading
Problems, Resources, and Issues in Mathematics Undergraduate Studies (PRIMUS)
Jeff Ford, Rachel Erickson, Ha Le, Kaylee Vick, and Jillian Downey [link]

A study on Channel Popularity in Twitch
Ha Le, Junming Wu, Louis Yu, Melissa Lynn
[pdf][presentation][code] [poster]

One-dimensional Port-and-Sweep Solitaire Armies
Filip Belik, Ha Le, Jacob Siehler
[pdf][presentation]

TEACHING EXPERIENCE

Spring 2020 - now: Introduction to Computer Science I&II (MCS-178,177)
Spring 2021, Spring 2022: Principles of Programming Languages (MCS-287)
Fall 2021: Intro to Computer Organization (MCS-284)
Spring 2020 - Fall 2021: Pre-Calculus, Calculus I, Calculus II, Multivariables Calculus (MCS-119,121,122,222)

AWARDS AND FUNDINGS

Summer 2021 Jeff Roseoff Fund for undergraduate summer research in MCS department ($2000)
Summer 2020 Stephen Hilding Fund for undergraduate summer research ($3000)
Count Folke Bernadotte International Student Scholarship for international students ($120 000)

NEWS

10/5/24-10/9/24: I will be presenting my work on audio-uEMA at Ubicomp/IWSC 2024!