Recent Projects
Full Publication List
2024
WatchLink: Enhancing Smartwatches with Sensor Add-Ons via ECG Interface
Proceedings of the 37th Annual ACM Symposium on User Interface Software and Technology
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From Classification to Clinical Insights: Towards Analyzing and Reasoning About Mobile and Behavioral Health Data With Large Language Models
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2024
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LabelAId: Just-in-time AI Interventions for Improving Human Labeling Quality and Domain Knowledge in Crowdsourcing Systems
Proceedings of the CHI Conference on Human Factors in Computing Systems (CHI), 2024
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"I will just have to keep driving": A Mixed-methods Investigation of Lack of Agency within the Thai Motorcycle Rideshare Driver Community
Proceedings of the ACM conference on Computer Supported Cooperative Work (CSCW1), 2024
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DeltaLCA: Comparative Life-Cycle Assessment for Electronics Design
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2024
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Thermal Earring: Low-power Wireless Earring for Longitudinal Earlobe Temperature Sensing
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2024
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2023
BigSmall: Efficient Multi-Task Learning for Disparate Spatial and Temporal Physiological Measurements
IEEE/CVF Winter Conference on Applications of Computer Vision (WACV 2024)
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Motion Matters: Neural Motion Transfer for Better Camera Physiological Measurement
IEEE/CVF Winter Conference on Applications of Computer Vision (WACV 2024), Oral, Top 2.7%, 53 out of 2042 Submissions
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BusStopCV: A Real-time AI Assistant for Labeling Bus Stop Accessibility Features in Streetscape Imagery
Proceedings of the 25th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS), 2023
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OptiRing: Low-Resolution Optical Sensing for Subtle Thumb-to-Index Micro-Interactions
SUI '23: Proceedings of the 2023 ACM Symposium on Spatial User Interaction
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MilliMobile: An Autonomous Battery-free Wireless Microrobot
Proceedings of the 29th Annual International Conference on Mobile Computing and Networking (MobiCom 2023)
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MMTSA: Multi-Modal Temporal Segment Attention Network for Efficient Human Activity Recognition
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, 2023
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rPPG-Toolbox: Deep Remote PPG Toolbox
Conference on Neural Information Processing Systems (NeurIPS’ 23) Datasets and Benchmarks Track
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MMPD: Multi-Domain Mobile Video Physiology Dataset
45th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2023
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Z-Ring: Single-Point Bio-Impedance Sensing for Gesture, Touch, Object and User Recognition
Conference on Human Factors in Computing Systems (CHI), 2023
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Understanding People’s Concerns and Attitudes Toward Smart Cities
Conference on Human Factors in Computing Systems (CHI), 2023
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AdHocProx: Sensing Mobile, Ad-Hoc Collaborative Device Formations using Dual Ultra-Wideband Radios
Conference on Human Factors in Computing Systems (CHI), 2023
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GlucoScreen: A Smartphone-based Readerless Glucose Test Strip for Prediabetes Screening
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT/Ubicomp 2023)
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FeverPhone: Accessible Core-Body Temperature Sensing for Fever Monitoring Using Commodity Smartphones
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT/Ubicomp 2023), Distinguished Paper Award
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GLOBEM: Cross-Dataset Generalization of Longitudinal Human Behavior Modeling
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT/Ubicomp 2023), Distinguished Paper Award / Best Paper Award
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Evaluating a Novel, Portable, Self-Administrable Device (“Beacon”) That Measures Critical Flicker Frequency as a Test for Hepatic Encephalopathy
The American Journal of GASTROENTEROLOGY
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Efficientphys: Enabling simple, fast and accurate camera-based vitals measurement
IEEE/CVF Winter Conference on Applications of Computer Vision (WACV 2023)
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2022
SCAMPS: Synthetics for Camera Measurement of Physiological Signals
Conference on Neural Information Processing Systems (NeurIPS' 22) Datasets and Benchmarks Track
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GLOBEM Dataset: Multi-Year Datasets for Longitudinal Human Behavior Modeling Generalization
Conference on Neural Information Processing Systems (NeurIPS' 22) Datasets and Benchmarks Track
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Automatic Classification of Audio Uroflowmetry with a Smartwatch
44th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2022
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ClearBuds: wireless binaural earbuds for learning-based speech enhancement
Proceedings of the 20th Annual International Conference on Mobile Systems, Applications and Services (MobiSys '22)
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Passively Sensing SARS-CoV-2 RNA in Public Transit Buses
Science of The Total Environment, 2022
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FaceOri: Tracking Head Position and Orientation Using Ultrasonic Ranging on Earphones
Conference on Human Factors in Computing Systems (CHI), 2022
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Federated Remote Physiological Measurement with Imperfect Data
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops, 2022
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Using High-Fidelity Avatars to Advance Camera-based Cardiac Pulse Measurement
IEEE Transactions on Biomedical Engineering, 2022
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MobilePhys: Personalized Mobile Camera-Based Contactless Physiological Sensing
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2022
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O-pH: Optical pH Monitor to Measure Oral Biofilm Acidity and Assist in Enamel Health Monitoring
IEEE Transactions on Biomedical Engineering, 2022, Featured Article of the Issue
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2021
Reliable and Trustworthy Machine Learning for Health Using Dataset Shift Detection
Conference on Neural Information Processing Systems (NeurIPS 2021)
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FRILL: A Non-Semantic Speech Embedding for Mobile Devices
INTERSPEECH, 2021
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Augmented Silkscreen: Designing AR Interactions for Debugging Printed Circuit Boards
ACM Designing Interactive Systems Conference (DIS), 2021
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Synthetic Data for Multi-Parameter Camera-Based Physiological Sensing
43rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2021
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Facilitating Text Entry on Smartphones with QWERTY Keyboard for Users with Parkinson’s Disease
Conference on Human Factors in Computing Systems (CHI), 2021
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Understanding the Design Space of Mouth Microgestures
ACM Designing Interactive Systems Conference (DIS), 2021
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Online Mobile App Usage as an Indicator of Sleep Behavior and Job Performance
The Web Conference (WWW), 2021
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The Design and Evaluation of a Mobile System for Rapid Diagnostic Test Interpretation
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2021
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MetaPhys: Few-Shot Adaptation for Non-Contact Physiological Measurement
ACM Conference on Health, Inference, and Learning (ACM-CHIL), 2021
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SplitSR: An End-to-End Approach to Super-Resolution on Mobile Devices
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2021
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2020
Optical Gaze Tracking with Spatially-Sparse Single-Pixel Detectors
2020 IEEE International Symposium on Mixed and Augmented Reality (ISMAR)
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Multi-Task Temporal Shift Attention Networks for On-Device Contactless Vitals Measurement
Conference on Neural Information Processing Systems (NeurIPS 2020), Oral, Top 1%, 105 out of 9454 Submissions
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Multi-Channel Facial Photoplethysmography Sensing
42nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2020
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Supporting Smartphone-Based Image Capture of Rapid Diagnostic Tests in Low-Resource Settings
International Conference on Information and Communication Technologies and Development (ICTD), 2020
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Whosecough: In-the-Wild Cougher Verification Using Multitask Learning
IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2020
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MoveVR: Enabling Multiform Force Feedback in Virtual Reality using Household Cleaning Robot
Conference on Human Factors in Computing Systems (CHI), 2020
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UbiquiTouch: Self Sustaining Ubiquitous Touch Interfaces
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, 2020
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Riptide: Fast End-to-End Binarized Neural Networks
Proceedings of Machine Learning and Systems, 2020
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2019
AuraRing: Precise Electromagnetic Finger Tracking
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2020
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FlexTouch: Enabling Large-Scale Interaction Sensing Beyond Touchscreens Using Flexible and Conductive Materials
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2019
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Challenges in Realizing Smartphone-based Health Sensing
IEEE Pervasive Computing, 2019, Best Paper Runner-Up
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Aura: Inside-out Electromagnetic Controller Tracking
17th ACM International Conference on Mobile Systems, Applications, and Services (MobiSys), 2019
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IDCam: Precise Item Identification for AR Enhanced Object Interactions
13th Annual IEEE International Conference on RFID, 2019, Best Paper Nominee
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IDAct: Towards Unobtrusive Recognition of User Presence and Daily Activities
13th Annual IEEE International Conference on RFID, 2019
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Optical pH measurement system using a single fluorescent dye for assessing susceptibility to dental caries
Journal of Biomedical Optics, 2019
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2018
Heterogeneous Bitwidth Binarization in Convolutional Neural Networks
Conference on Neural Information Processing Systems (NeurIPS 2018)
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FarmChat: A Conversational Agent to Answer Farmer Queries
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2018
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RoyalFlush: Non-Invasive Water Level Monitor to Prevent Toilet Overflows
Proceedings of the 8th International Conference on the Internet of Things, 2018
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CASPER: Capacitive Serendipitous Power Transfer for Through-body Charging of Multiple Wearable Devices
ACM International Symposium on Wearable Computers (ISWC), 2018
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CapHarvester: A Stick-on Capacitive Energy Harvester Using Stray Electric Field from AC Power Lines
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2018
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SpiroConfidence: Determining the Validity of Smartphone Based Spirometry Using Machine Learning
Engineering in Medicine and Biology Conference (EMBC) 2018
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Evaluating and Informing the Design of Chatbots
ACM Conference on Designing Interactive Systems (DIS), 2018
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Drunk User Interfaces: Determining Blood Alcohol Level through Everyday Smartphone Tasks
Conference on Human Factors in Computing Systems (CHI), 2018
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Convey: Exploring the Use of a Context View for Chatbots
Conference on Human Factors in Computing Systems (CHI), 2018
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Seismo: Blood Pressure Monitoring using Built-in Smartphone Accelerometer and Camera
Conference on Human Factors in Computing Systems (CHI), 2018, Honorable Mention Award
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Opportunistic Sensing with Mic Arrays on Smart Speakers for Distal Interaction and Exercise Tracking
IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2018
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Haptic Revolver: Touch, Shear, Texture, and Shape Rendering on a Reconfigurable Virtual Reality Controller
Conference on Human Factors in Computing Systems (CHI), 2018, Honorable Mention Award
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2017
Carpacio: Repurposing Capacitive Sensors to Distinguish Driver and Passenger Touches on In-Vehicle Screens
30th Annual ACM Symposium on User Interface Software and Technology (UIST), 2017
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DigiTouch: Reconfigurable Thumb-to-Finger Input and Text Entry on Head-mounted Displays
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2017
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Noninvasive Hemoglobin Measurement using Unmodified Smartphone Camera and White Flash
39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2017
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Automatic Characterization of User Errors in Spirometry
39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2017
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PupilScreen: Using Smartphones to Assess Traumatic Brain Injury
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2017
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Glabella: Continuously Sensing Blood Pressure Behavior using an Unobtrusive Wearable Device
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2017, Best Paper Award
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BiliScreen: Smartphone-Based Scleral Jaundice Monitoring for Liver and Pancreatic Disorders
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), 2017
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Making Sense of Sleep Sensors: How Sleep Sensing Technologies Support and Undermine Sleep Health
Conference on Human Factors in Computing Systems (CHI), 2017
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2016
EyeContact: Scleral Coil Eye Tracking for Virtual Reality
ACM International Symposium on Wearable Computers (ISWC), 2016, Best Paper Award
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HemaApp: Noninvasive Blood Screening of Hemoglobin Using Smartphone Cameras
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2016, Best Paper Award
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SpiroCall: Measuring Lung Function over a Phone Call
Conference on Human Factors in Computing Systems (CHI), 2016, Honorable Mention Award
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PaperID: A Technique for Drawing Functional Battery-Free Wireless Interfaces on Paper
Conference on Human Factors in Computing Systems (CHI), 2016
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ID-Match: A Hybrid Computer Vision and RFID System for Recognizing Individuals in Groups
Conference on Human Factors in Computing Systems (CHI), 2016
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Finexus: Tracking Precise Motions of Multiple Fingertips Using Magnetic Sensing
Conference on Human Factors in Computing Systems (CHI), 2016, Honorable Mention Award
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2015
MagnifiSense: Inferring Device Interaction Using Wrist-worn Passive Magneto-inductive Sensors
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2015
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EVHomeShifter: Evaluating Intelligent Techniques for Using Electrical Vehicle Batteries to Shift when Homes Draw Energy from the Grid
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2015
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DoppleSleep: A Contactless Unobtrusive Sleep Sensing System Using Short-range Doppler Radar
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2015, Honorable Mention Award
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HyperCam: Hyperspectral Imaging for Ubiquitous Computing Applications
UbiComp '15, Honorable Mention Award
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Tongue-in-Cheek: Using Wireless Signals to Enable Non-Intrusive and Flexible Facial Gestures Detection
Conference on Human Factors in Computing Systems (CHI), 2015, Honorable Mention Award
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How Good is 85%?: A Survey Tool to Connect Classifier Evaluation to Acceptability of Accuracy
Conference on Human Factors in Computing Systems (CHI), 2015
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Wibreathe: Estimating respiration rate using wireless signals in natural settings in the home
IEEE International Conference on Pervasive Computing and Communications (PerCom), 2015, Honorable Mention Award
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DOSE: Detecting user-driven operating states of electronic devices from a single sensing point
IEEE International Conference on Pervasive Computing and Communications (PerCom), 2015
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2014
SideSwipe: Detecting In-air Gestures Around Mobile Devices Using Actual GSM Signal
ACM symposium on User Interface Software and Technology (UIST), 2014
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Powering Wireless Sensor Nodes with Ambient Temperature Changes
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2014, Honorable Mention Award
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BiliCam: Using Mobile Phones to Monitor Newborn Jaundice
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2014, Honorable Mention Award
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AirLink: Sharing Files Between Multiple Devices Using In-air Gestures
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2014
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A Self-calibrating Approach to Whole-home Contactless Power Consumption Sensing
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2014
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SurfaceLink: Using Inertial and Acoustic Sensing to Enable Multi-device Interaction on a Surface
Conference on Human Factors in Computing Systems (CHI), 2014
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2013
Experimental Security Analyses of Non-Networked Compact Fluorescent Lamps: A Case Study of Home Automation Security
USENIX Learning from Authoritative Security Experiment Results (LASER), 2013
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uTrack: 3D Input Using Two Magnetic Sensors
ACM symposium on User Interface Software and Technology (UIST), 2013
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Good Vibrations: An Evaluation of Vibrotactile Impedance Matching for Low Power Wearable Applications
ACM symposium on User Interface Software and Technology (UIST), 2013
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The Sound of Touch: On-body Touch and Gesture Sensing Based on Transdermal Ultrasound Propagation
ITS '13, 10-Year Impact Award from ACM Interactive Surfaces and Spaces Conference (ISS 2022)
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Whole-home Gesture Recognition Using Wireless Signals
ACM Annual International Conference on Mobile Computing and Networking (MobiCom), 2013, Best Paper Award
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uLocate: A Ubiquitous Location Tracking System for People Aging with Disabilities
International Conference on Body Area Networks (BodyNets), 2013
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DopLink: Using the Doppler Effect for Multi-device Interaction
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2013
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AirWave: Non-contact Haptic Feedback Using Air Vortex Rings
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2013
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uTouch: Sensing Touch Gestures on Unmodified LCDs
Conference on Human Factors in Computing Systems (CHI), 2013
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ContextType: Using Hand Posture Information to Improve Mobile Touch Screen Text Entry
Conference on Human Factors in Computing Systems (CHI), 2013
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Tracking Lung Function on Any Phone
ACM DEV '13
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2012
GripSense: Using Built-in Sensors to Detect Hand Posture and Pressure on Commodity Mobile Phones
ACM symposium on User Interface Software and Technology (UIST), 2012
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SpiroSmart: Using a Microphone to Measure Lung Function on a Mobile Phone
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2012, Honorable Mention Award
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Investigating Receptiveness to Sensing and Inference in the Home Using Sensor Proxies
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2012, Honorable Mention Award
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An Ultra-low-power Human Body Motion Sensor Using Static Electric Field Sensing
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2012, Best Paper Award
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SoundWave: Using the Doppler Effect to Sense Gestures
Conference on Human Factors in Computing Systems (CHI), 2012
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Humantenna: Using the Body As an Antenna for Real-time Whole-body Interaction
Conference on Human Factors in Computing Systems (CHI), 2012, Honorable Mention Award
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GyroTab: A Handheld Device That Provides Reactive Torque Feedback
Conference on Human Factors in Computing Systems (CHI), 2012
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The Design and Evaluation of Prototype Eco-feedback Displays for Fixture-level Water Usage Data
Conference on Human Factors in Computing Systems (CHI), 2012, Honorable Mention Award
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2011
Televisions, Video Privacy, and Powerline Electromagnetic Interference
ACM Conference on Computer and Communications Security (CCS), 2011
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LightWave: Using Compact Fluorescent Lights As Sensors
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2011, Honorable Mention Award
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Accurate and Privacy Preserving Cough Sensing Using a Low-cost Microphone
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2011
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A Longitudinal Study of Pressure Sensing to Infer Real-world Water Usage Events in the Home
International Conference on Pervasive Computing (Pervasive), 2011
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Your Noise is My Command: Sensing Gestures Using the Body As an Antenna
Conference on Human Factors in Computing Systems (CHI), 2011, Best Paper Award
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The Haptic Laser: Multi-sensation Tactile Feedback for At-a-distance Physical Space Perception and Interaction
Conference on Human Factors in Computing Systems (CHI), 2011
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Interactive Generator: A Self-powered Haptic Feedback Device
Conference on Human Factors in Computing Systems (CHI), 2011, Best Paper Award
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HeatWave: Thermal Imaging for Surface User Interaction
Conference on Human Factors in Computing Systems (CHI), 2011, Honorable Mention Award
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2010
SqueezeBlock: Using Virtual Springs in Mobile Devices for Eyes-free Interaction
ACM symposium on User Interface Software and Technology (UIST), 2010
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WATTR: A Method for Self-powered Wireless Sensing of Water Activity in the Home
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2010
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SNUPI: Sensor Nodes Utilizing Powerline Infrastructure
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2010, Honorable Mention Award
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ElectriSense: Single-point Sensing Using EMI for Electrical Event Detection and Classification in the Home
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2010, Best Paper Award
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Studying the Use and Utility of an Indoor Location Tracking System for Non-experts
International Conference on Pervasive Computing (Pervasive), 2010
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GasSense: Appliance-level, Single-point Sensing of Gas Activity in the Home
International Conference on Pervasive Computing (Pervasive), 2010
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The Design and Evaluation of an End-user-deployable, Whole House, Contactless Power Consumption Sensor
Conference on Human Factors in Computing Systems (CHI), 2010, Honorable Mention Award
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Automatic Classification of Daily Fluid Intake
IEEE 4th International Conference on Pervasive Computing for Healthcare (PervasiveHealth), 2010, Best Paper Award
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2009
HydroSense: Infrastructure-mediated Single-point Sensing of Whole-home Water Activity
ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), 2009, Honorable Mention Award
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Detecting Human Movement by Differential Air Pressure Sensing in HVAC System Ductwork: An Exploration in Infrastructure Mediated Sensing
Pervasive, Ubicomp 10 year impact award
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2008
2007
Blui: Low-cost Localized Blowable User Interfaces
ACM symposium on User Interface Software and Technology (UIST), 2007
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At the Flick of a Switch: Detecting and Classifying Unique Electrical Events on the Residential Power Line
UbiComp, Ubicomp 10 year impact award
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