Saif Mahmud

Hi, there!

I’m Saif Mahmud, a Ph.D. student in Computing and Information Science at Cornell University. I am a member of SciFi Lab and advised by Prof. Cheng Zhang. My research interest lies broadly in the area of ubiquitous computing, machine learning and human computer interaction.

Previously, I worked as a researcher at Center for Computational & Data Sciences (CCDS) where my works were supervised by Prof. Amin Ahsan Ali.

I received my bachelor’s degree in Computer Science and Engineering from the University of Dhaka.

I am actively seeking research internships for Summer/Fall 2025.

News

• [Oct 2024] "EchoGuide" wins Best Paper Honorable Mention Award at UbiComp 2024.
• [Sep 2024] "ActSonic", "Ring-a-Pose", and "SonicID" accepted in IMWUT/UbiComp 2025.
• [Jul 2024] "MunchSonic" and "EchoGuide" accepted in UbiComp/ISWC 2024.
• [Jul 2024] "SeamPose" accepted in UIST 2024.
• [Jan 2024] "STLGRU" accepted in PAKDD 2024.
• [Nov 2023] "GazeTrak" accepted in MobiCom 2024.
• [Oct 2023] "PoseSonic" covered by: Cornell Chronicle, Endgadget, hackster.io, Live Science, BNN Network, Tech Times, and a few other media outlets.
• [Jul 2023] " PoseSonic" accepted in IMWUT/UbiComp 2023.
• [Aug 2022] Started my Ph.D. at Cornell University.
See More
[Apr 2022] Received scholarship from the Government of Bangladesh for outstanding result in undergraduate studies.
[Feb 2021] Paper “Hierarchical Self Attention Based Autoencoder for Open-Set Human Activity Recognition” accepted in PAKDD 2021.
[Jan 2020] Paper “Human Activity Recognition from Wearable Sensor Data Using Self-Attention” accepted in ECAI 2020.
[Jan 2020] Successfully defended my undergraduate thesis!
[Feb 2020] Started working on ‘Rehabilitation of Post-Stroke Paralysis Using Three-Dimensional Kinect and Wearable Sensors’ project funded by ICT Division, Government of Bangladesh
[Sep 2019] Started working on a collaborative project of University of Dhaka and Ghent University, Belgium for machine learning approach based electoral violence data analysis and visualization funded by IFES.

Publications

1. ActSonic: Recognizing Everyday Activities from Inaudible Acoustic Waves Around the Body
   Saif Mahmud, Vineet Parikh, Qikang Liang, Ke Li, Ruidong Zhang, Ashwin Ajit, Vipin Gunda, Devansh Agarwal, François Guimbretière, Cheng Zhang
   Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, IMWUT/UbiComp 2025.
   [Paper] [Video]

2. Ring-a-Pose: A Ring for Continuous Hand Pose Tracking
   Tianhong Catherine Yu, Guilin Hu, Ruidong Zhang, Hyunchul Lim, Saif Mahmud, Chi-Jung Lee, Ke Li, Devansh Agarwal, Shuyang Nie, Jinseok Oh, François Guimbretière, Cheng Zhang
   Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, IMWUT/UbiComp 2025.
   [Paper]

3. SonicID: User Identification on Smart Glasses with Acoustic Sensing
   Ke Li, Devansh Agarwal, Ruidong Zhang, Vipin Gunda, Tianjun Mo, Saif Mahmud, Boao Chen, François Guimbretière, Cheng Zhang
   Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, IMWUT/UbiComp 2025.
   [Paper]

4. MunchSonic: Tracking Fine-grained Dietary Actions through Active Acoustic Sensing on Eyeglasses
   Saif Mahmud, Devansh Agarwal, Ashwin Ajit, Qikang Liang, Thalia Viranda, François Guimbretière, Cheng Zhang
   ACM International Symposium on Wearable Computing, UbiComp/ISWC 2024.
   [Paper]

5. EchoGuide: Active Acoustic Guidance for LLM-Based Eating Event Analysis from Egocentric Videos
   Vineet Parikh, Saif Mahmud, Devansh Agarwal, Ke Li, François Guimbretière, Cheng Zhang
   ACM International Symposium on Wearable Computing, UbiComp/ISWC 2024.
   🏆 Best Paper Honorable Mention Award
   [Paper]

6. SeamPose: Repurposing Seams as Capacitive Sensors in a Shirt for Upper-Body Pose Tracking
   Tianhong Catherine Yu, Mary Zhang, Peter He, Chi-Jung Lee, Cassidy Cheesman, Saif Mahmud, Ruidong Zhang, François Guimbretière, Cheng Zhang
   ACM Symposium on User Interface Software and Technology, UIST 2024.
   [Paper] [Video]

7. GazeTrak: Exploring Acoustic-based Eye Tracking on a Glass
   Ke Li, Ruidong Zhang, Boao Chen, Siyuan Chen, Sicheng Yin, Saif Mahmud, François Guimbretière, Cheng Zhang
   30th Annual International Conference On Mobile Computing And Networking, MobiCom 2024.
   [Paper] [Video]

8. STLGRU: Spatio-Temporal Lightweight Graph GRU for Traffic Flow Prediction
   Kishor Kumar Bhaumik, Fahim Faisal Niloy, Saif Mahmud, Simon S. Woo
   28th Pacific-Asia Conference on Knowledge Discovery and Data Mining, PAKDD 2024.
   [Paper]

9. PoseSonic: 3D Upper Body Pose Estimation Through Egocentric Acoustic Sensing on Smartglasses
   Saif Mahmud, Ke Li, Guilin Hu, Hao Chen, Richard Jin, Ruidong Zhang, François Guimbretière, Cheng Zhang
   Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, IMWUT/UbiComp 2023.
   [Paper] [Video]

10. Hierarchical Self Attention Based Autoencoder for Open-Set Human Activity Recognition
    M. Tanjid Hasan Tonmoy*, Saif Mahmud*, A K M Mahbubur Rahman, M Ashraful Amin, Amin Ahsan Ali
    25th Pacific-Asia Conference on Knowledge Discovery and Data Mining, PAKDD 2021, Springer, May 2021.
    [Paper] [Code]

11. Human Activity Recognition from Wearable Sensor Data Using Self-Attention
    Saif Mahmud*, M. Tanjid Hasan Tonmoy*, Kishor Kumar Bhaumik, A K M Mahbubur Rahman, M Ashraful Amin, Mohammad Shoyaib, Muhammad Asif Hossain Khan, Amin Ahsan Ali
    24th European Conference on Artificial Intelligence‚ ECAI 2020.
    [Paper] [Code]

12. GRU-based Attention Mechanism for Human Activity Recognition
    Md Nazmul Haque, M. Tanjid Hasan Tonmoy, Saif Mahmud, Amin Ahsan Ali, Muhammad Asif Hossain Khan, Mohammad Shoyaib
    IEEE International Conference on Advances in Science, Engineering and Robotics Technology, ICASERT 2019.
    [Paper]

Contact

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