Chen Chen

Publications Main venues include HCI (e.g., CHI, UIST), A11y (e.g., ASSETS), XR (e.g., ISMAR), and Sensing (e.g., SenSys, IPSN, IMWUT).

Mites: Design and Deployment of a General-Purpose Sensing Infrastructure for Buildings

Sudershan Boovaraghavan, Chen Chen, Anurag Maravi, Mike Czapik, Yang Zhang, Chris Harrison, Yuvraj Agarwal
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT/UbiComp '23), Cancun, Mexico

Real-world deployment of building-scale, general-purpose and high-fiedlity sensing system is challenging! Mites is the first scalable end-to-end hardware-software system for supporting and managing distributed general-purpose sensors in buildings, and has been successfully deployed in Carnegie Mellon University of more than five years.

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VRContour: Bringing Contour Delineations of Medical Structures Into Virtual Reality

Chen Chen, Matin Yarmand, Varun Singh, Michael V. Sherer, James D. Murphy, Yang Zhang, Nadir Weibel
The 2022 IEEE International Symposium on Mixed and Augmented Reality (ISMAR '22), Singapore (Acceptance Rate = 21.6%)

Contour delineation is an indispensable step in radiotherapy treatment planning, yet today’s contouring software (such as Eclipse) is constrained to only work with a 2D display, which is less intuitive and requires high task loads. VRContour is the first effort that aims to explore how to use VR to support an easier and more intuitive contour delineation workflow.

 Teaser  Talk  Project Page

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Investigating Input Modality and Task Geometry on Precision-first 3D Drawing in Virtual Reality

Chen Chen, Matin Yarmand, Zhuoqun Xu, Varun Singh, Yang Zhang, Nadir Weibel
The 2022 IEEE International Symposium on Mixed and Augmented Reality (ISMAR '22), Singapore (Acceptance Rate = 21.6%)

Precision-first 3D drawing refers to the 3D drawing process where the precision is prioritized, which is indispensable for many precise 3D tasks. However, due to lack of physical support, limited depth perception, and the non–planar nature of 3D curves, it is challenging to adjust mid–air strokes to achieve high precision. We demonstrated a first effort to understand how task geometric shapes and input modalities affect such precision–first drawing performance in a within–subject study (n = 12) focusing on 3D target tracing in commercially available VR headsets.

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Understanding Barriers and Design Opportunities to Improve Healthcare and QOL for Older Adults through Voice Assistants

Chen Chen, Janet G Johnson, Kemeberly Charles, Alice Lee, Ella T Lifset, Michael Hogarth, Alison A Moore, Emilia Farcas, Nadir Weibel
The 2021 ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '21), Virtual Event, USA (Acceptance Rate = 29%)

One key challenge of aging-in-place is to allow older adults to easily access and interact with digital information, which however is challenging! We conducted a first qualitative study with real-world older adults, geriatricians and senior care nurses to understand potential design opportinuity to improve healthcare and quality of life for older adults through voice assistants.

 Teaser  Project Page  News

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EXGsense: Toward facial gesture sensing with a sparse near-eye sensor array

Chen Chen, Ke Sun, Xinyu Zhang
The 2021 ACM International Conference on Information Processing in Sensor Networks (IPSN '21), Nashville, TN, USA (Acceptance Rate = 24.5%)

Immersive face-to-virtual-face telecommunication is one unique use case for virtual reality (VR) technologies. Existing camera-based telephony systems cannot be used for such immersive VR video chat, due to the physical occlusions of head-mounted displays (HMDs) and/or unwieldy positioning of cameras. We present ExGSense, a new VR input modality that can sense and reconstruct both upper and lower facial gestures, by only using lightweight biopotential sensors embedded within the HMDs.

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"Alexa, stop spying on me!" Speech Privacy Protection Against Voice Assistants

Ke Sun, Chen Chen, Xinyu Zhang
The 2020 ACM International Conference on Embedded Networked Sensor Systems (SenSys '20), Virtual Event, Japan (Acceptance Rate = 18%)

Voice assistants (VAs) are becoming highly popular recently as a general means of interacting with the Internet of Things. However, the use of always-on microphones on VAs imposes a looming threat on users' privacy. We propose MicShield, the first system that serves as a companion device to enforce privacy preservation on VAs.

Short Papers & Posters

How do Older Adults Set Up Voice Assistants? Lessons Learned from a Deployment Experience for Older Adults to Set Up Standalone Voice Assistants

Chen Chen, Ella T. Lifset, Yichen Han, Arkajyoti Roy, Michael Hogarth, Alison A. Moore, Emilia Farcas, Nadir Weibel
The 2023 ACM International Conference on Designing Interactive Systems (DIS '23 Companion), Pittsburgh, PA, USA

 Teaser  Project Page

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Professional Experience

Research Scientist Intern, Adobe Research, Remote/San Francisco, CA, USA, Summer '22

Teaching

Teaching Assistant, CSE 118/218 Ubiquitous Computing (Fall '22), UC San Diego [CSE 118 Student Evaluation] [CSE 218 Student Evaluation]

Teaching Assistant, WES 237A Introduction to Embedded Computing (Winter '21), UC San Diego [Student Evaluation] [Instructor Evaluation]

Teaching Assistant, CSE 291H Data Center System (Fall '19), UC San Diego [Student Evaluation] [Instructor Evaluation]

Teaching Assistant, CSE 112 Advanced Software Engineering (Fall '20), UC San Diego [Student Evaluation]

Teaching Assistant, COGS 118 AI Algorithms (Summer '19), UC San Diego [Student Evaluation]

Teaching Assistant, 08-672 Web Application Development (Fall '16, Fall '17), Carnegie Mellon University

Student Mentored

Arkajoyti Roy, Math + CS Undergrad Student @UCSD, Fall '22 - Summer '23

Varun Singh, CS Undergrad Student @UCSD, Fall '21 - Summer '23

Yichen Han (now MS Student @Carnegie Mellon University), Winter '22 - Summer '22

Christopher B. Han, Winter '22 - Summer '22

Peng W. Lee, Winter '22 - Summer '22

Ella T. Lifset, Biology Undergrad Student @UCSD, Summer '20 - Summer '21

Robin Z. Xu (now Staff Engineer @Intuitive), Winter '21 - Summer '21

Services

IMWUT/UbiComp Video Co-Chair ('23)

UCSD CSE Ph.D. Visit Day Area Lead (HCI) ('22 - '23)

UCSD CSE Ph.D. Admission Committee ('19 - '23')

Program Committee/Associate Chair (AC) for ACM CHI '23 (Late Breaking Work Track)

Conference Reviewers for CHI, UIST, CSCW, IUI, DIS, EICS, IEEE VR, ISMAR, ICMI, SUI, VRST ('20 - Now)

Journal Reviewers for IMWUT, IJHCI, PLOS Digital Health ('20 - Now)

Student Volunteer at ASSETS '21, '22

Co-Host for DLab Research Meeting, UCSD

Volunteer at the International Humanity Foundation, Banda Aceh, Indonesia, Summer '13