Intro

As a computer scientist, I work in the intersection between machine learning, ubiquitous computing, and mental health. Prior to my PhD, I was Data & AI graduate scientist at AstraZeneca, where I pursued practical research problems in medical imaging, digital health, and bioinformatics.

Currently, my research focuses on the following areas:

  1. Investigating the relationship between para-linguistic features in speech and mental illness symptoms.
  2. Robust speech-based machine learning models that generalize across populations using unsupervised and semi-supervised methods.
  3. Moving toward real-time intervention systems for mental health emergencies like suicidal ideation.

Research

Publications

2024

[15] Contextual AI Journaling: Integrating LLM and Time Series Behavioral Sensing Technology to Promote Self‐Reflection and Well‐being using the MindScape App. (In Press)
Subigya Nepal, Arvind Pillai, William Campbell, Talie Massachi, Eunsol Soul Choi, Michael Heinz, Xuhai Xu, Joanna Kuc, Jeremy F Huckins, Jason Holden, Colin Depp, Nicholas Jacobson, Mary P Czerwinski, Eric Granholm, Andrew T Campbell.
ACM Conference on Human Factors in Computing Systems (ACM CHI EA 2024)

[14] MoodCapture: Depression Detection using In-the-Wild Smartphone Images (In Press)
Arvind Pillai*, Subigya Nepal*, Weichen Wang, Tess Griffin, Amanda C Collins, Michael Heinz, Damien Lekkas, Shayan Mirjafari, Matthew Nemesure, George Price, Nicholas Jacobson, Andrew Campbell.
*equal contribution
ACM Conference on Human Factors in Computing Systems (ACM CHI 2024)
Paper

[13] Capturing the College Experience: A Four-Year Mobile Sensing Study of Mental Health, Resilience and Behavior of College Students during the Pandemic.
Subigya Nepal, Wenjun Liu, Arvind Pillai, Weichen Wang, Vlado Vojdanovski, Jeremy Huckins, Courtney Rogers, Meghan Meyer, Andrew Campbell
Proceedings of the ACM on interactive, mobile, wearable and ubiquitous technologies. (ACM IMWUT Mar 2024/UbiComp 2024)
Paper

2023

[12] Investigating generalizability of speech-based suicidal ideation detection using mobile phones.
Arvind Pillai, Subigya Nepal, Weichen Wang, Matthew Nemesure, Michael Heinz, George Price, Damien Lekkas, Amanda Collins, Tess Griffin, Benjamin Buck, Sarah M. Preum, Trevor Cohen, Nicholas C Jacobson, Dror Ben-Zeev, Andrew Campbell.
Proceedings of the ACM on interactive, mobile, wearable and ubiquitous technologies. (ACM IMWUT Dec 2023/UbiComp 2024)
Paper

[11] Rare life event detection via mobile sensing using multi-task learning.
Arvind Pillai, Subigya Nepal, Andrew Campbell.
In Conference on Health, Inference, and Learning. PMLR. (CHIL 2023)
Paper

2022

[10] First-gen lens: Assessing mental health of first-generation students across their first year at college using mobile sensing.
Weichen Wang, Subigya Nepal, Jeremy F. Huckins, Lessley Hernandez, Vlado Vojdanovski, Dante Mack, Jane Plomp, Arvind Pillai, Mikio Obuchi, Alex daSilva, Ellis Murphy, Elin Hedlund, Courtney Rogers, Meghan Meyer, Andrew Campbell.
Proceedings of the ACM on interactive, mobile, wearable and ubiquitous technologies. (ACM IMWUT Jun 2022/UbiComp 2023)
Paper

[9] Accurate step count with generalized and personalized deep learning on accelerometer data.
Long Luu, Arvind Pillai, Halsey Lea, Ruben Buendia, Faisal M. Khan, Glynn Dennis
Sensors. vol. 22, no.11, p.3989
Paper

[8] Accurate step count with generalizable deep learning on accelerometer data.
Long Luu, Arvind Pillai, Halsey Lea, Ruben Buendia, Faisal M. Khan, Glynn Dennis
In International Conference on Pervasive Intelligence and Computing. IEEE.
Paper

[7] Machine learning enabled non-invasive diagnosis of nonalcoholic fatty liver disease and assessment of abdominal fat from mri data.
Arvind Pillai, Kamen Bliznashki, Emmette Hutchison, Chanchal Kumar, Mishal Patel.
medRxiv.
Paper

2021 & Prior

[6] Effective expression analysis using gene interaction matrices and convolutional neural network.
Arvind Pillai, Piotr Grabowski, Bino John.
bioRxiv. pp. 2021–09.
Paper

[5] Machine learning enabled non-invasive diagnosis of nonalcoholic fatty liver disease and assessment of abdominal fat from mri data.
Arvind Pillai, Kamen Bliznashki, Emmette Hutchison, Chanchal Kumar, Mishal Patel.
In Machine Learning for Health @ NeurIPS. (ML4H 2020)
Paper

[4] Personalized step counting using wearable sensors: A domain adapted lstm network approach.
Arvind Pillai, Halsey Lea, Faisal M. Khan, Glynn Dennis
In 2019 Applications of Machine Learning in Pharma and Healthcare (PharML) @ ECML-PKDD. (PharML 2019)
Paper

[3] Graph convolutional networks for predicting drug-protein interactions.
Hafez E. Manoochehri, Arvind Pillai, Mehrdad Nourani
In 2019 IEEE International Conference on Bioinformatics and Biomedicine. (IEEE BIBM 2019)
Paper

[2] Local diagonal extrema number pattern: A new feature descriptor for face recognition.
Arvind Pillai, Rajkumar Soundrapandiyan, Swapnil Satapathy, Suresh C. Satapathy, Ki-Hyun Jung, Rajakumar Krishnan.
Future Generation Computer Systems. vol. 81, pp. 297–306, 2018.
Paper

[1] Adaptive new top-hat transform and multi-scale sequential toggle operator based infrared image enhancement.
Arvind Pillai, Rajkumar Soundrapandiyan, K. Marimuthu, G. Rakasekaran
In 2017 Innovations in Power and Advanced Computing Technologies (i-PACT). IEEE, 2017, pp. 1–5.
Paper

Experience

Work

click here
Data Science & AI Graduate Scientist
AstraZeneca
September 2019 - July 2021

  • Rotation 3 - Analysed gene expression data by developing a novel transformation. Ultimately, we predicted compound-dose toxicity from the Toxicogenomics-Gates dataset and classfied cancer subtypes from The Cancer Genome Atlas (TCGA) dataset.
  • Rotation 2 - Developed a pre-diagnostic tool to stratify patients with Nonalcoholic Fatty Liver Disease using abdominal MRI data from the UK biobank.
  • Rotation 1 - Built a step count algorithm to classify steps across two wearable different devices.

Teaching

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Teaching Assistant
Dartmouth College
Spring 2023 - CS1 Introduction to Programming (Prof. Andrew Campbell)
Spring 2022 - CS1 Introduction to Programming (Prof. Andrew Campbell)
Fall 2021 - CS1 Introduction to Programming (Prof. Vasanta Kommineni)

Professional

Reviewer

2023 - ACM IMWUT/UbiComp, ML4H
2021 - Machine Learning for Healthcare (ML4H) @ NeurIPS

Talks

November 2023 - Alan Turing Institute - Data Science for Mental Health
"Generalizability in Mental Health: A Spotlight On Speech-Based Suicidal Ideation Detection"
Slide Deck

May 2023 - Dartmouth College (Research Presentation Exam)
"ArcFace: Additive Angular Margin Loss for Deep Face Recognition by Deng, J., Guo, J., et al."
Slide Deck

October 2022 - VIT University
"Towards detecting suicidal ideation in individuals experiencing mental health symptoms using audio diaries from mobile mobiles"

Contact

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