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- research-articleJanuary 2024
Orientation-Aware 3D SLAM in Alternating Magnetic Field from Powerlines
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), Volume 7, Issue 4Article No.: 182, Pages 1–25https://doi.org/10.1145/3631446Identifying new sensing modalities for indoor localization is an interest of research. This paper studies powerline-induced alternating magnetic field (AMF) that fills the indoor space for the orientation-aware three-dimensional (3D) simultaneous ...
- research-articleJanuary 2023
Efficient Adaptive Beacon Deployment Optimization for Indoor Crowd Monitoring Applications
- Yang Zhen,
- Masato Sugasaki,
- Yoshihiro Kawahara,
- Kota Tsubouchi,
- Matthew Ishige,
- Hiroaki Murakami,
- Masamichi Shimosaka
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), Volume 6, Issue 4Article No.: 201, Pages 1–22https://doi.org/10.1145/3569462The indoor crowd density monitoring system using BLE beacons is one of the effective ways to prevent overcrowded indoor situations. The indoor crowd density monitoring system consists of a mobile application at the user's side and the beacon sensor ...
- research-articleMarch 2021
Full-Dimension Relative Positioning for RFID-Enabled Self-Checkout Services
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), Volume 5, Issue 1Article No.: 7, Pages 1–23https://doi.org/10.1145/3448094Self-checkout services in today's retail stores are well received as they set free the labor force of cashiers and shorten conventional checkout lines. However, existing self-checkout options either require customers to scan items one by one, which is ...
- research-articleSeptember 2020
ER-Rhythm: Coupling Exercise and Respiration Rhythm Using Lightweight COTS RFID
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), Volume 3, Issue 4Article No.: 158, Pages 1–24https://doi.org/10.1145/3369808The locomotor-respiratory coupling (LRC) ratio of a person doing exercise is an important parameter to reflect the exercise safety and effectiveness. Existing approaches that can measure LRC either rely on specialized and costly devices or use heavy ...
- research-articleSeptember 2019
sharedCharging: Data-Driven Shared Charging for Large-Scale Heterogeneous Electric Vehicle Fleets
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), Volume 3, Issue 3Article No.: 108, Pages 1–25https://doi.org/10.1145/3351266Our society is witnessing a rapid vehicle electrification process. Even though being environmental-friendly, electric vehicles have not reached their full potentials due to prolonged charging time. Moreover, unbalanced spatiotemporal charging demand/...
- research-articleMarch 2019
RF-Focus: Computer Vision-assisted Region-of-interest RFID Tag Recognition and Localization in Multipath-prevalent Environments
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), Volume 3, Issue 1Article No.: 29, Pages 1–30https://doi.org/10.1145/3314416Capturing RFID tags in the region of interest (ROI) is challenging. Many issues, such as multipath interference, frequency-dependent hardware characteristics and phase periodicity, make RF phase difficult to accurately indicate the tag-to-antenna ...
- research-articleJuly 2018
RF-ECG: Heart Rate Variability Assessment Based on COTS RFID Tag Array
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), Volume 2, Issue 2Article No.: 85, Pages 1–26https://doi.org/10.1145/3214288As an important indicator of autonomic regulation for circulatory function, Heart Rate Variability (HRV) is widely used for general health evaluation. Apart from using dedicated devices (e.g, ECG) in a wired manner, current methods search for a ...
- research-articleJuly 2018
Enabling Public Cameras to Talk to the Public
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), Volume 2, Issue 2Article No.: 63, Pages 1–20https://doi.org/10.1145/3214266This paper asks: Is it possible for cameras in public areas, say ceiling cameras in a museum, to send personalized messages to people without knowing any addresses of their phones? We define this kind of problem as Private Human Addressing and develop a ...
- research-articleMarch 2018
RF-Kinect: A Wearable RFID-based Approach Towards 3D Body Movement Tracking
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), Volume 2, Issue 1Article No.: 41, Pages 1–28https://doi.org/10.1145/3191773The rising popularity of electronic devices with gesture recognition capabilities makes the gesture-based human-computer interaction more attractive. Along this direction, tracking the body movement in 3D space is desirable to further facilitate behavior ...
- research-articleMarch 2018
SiFi: Pushing the Limit of Time-Based WiFi Localization Using a Single Commodity Access Point
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), Volume 2, Issue 1Article No.: 10, Pages 1–21https://doi.org/10.1145/3191742There has been a booming interest in developing WiFi localization using multi-antenna (MIMO) access points (APs). Recent advances have demonstrated promising results that break the meter-accuracy barrier using commodity APs. Yet these state-of-the-art ...
- research-articleJanuary 2018
Inferring Correlation between User Mobility and App Usage in Massive Coarse-grained Data Traces
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), Volume 1, Issue 4Article No.: 153, Pages 1–21https://doi.org/10.1145/3161171With the rapid growth in smartphone usage, it has been more and more important to understand the patterns of mobile data consumption by users. In this paper, we present an empirical study of the correlation between user mobility and app usage patterns. ...
- research-articleSeptember 2017
FiDO: A Community-based Web Browsing Agent and CDN for Challenged Network Environments
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT), Volume 1, Issue 3Article No.: 108, Pages 1–25https://doi.org/10.1145/3132030Homes located on tribal lands, particularly in rural areas of the United States, continue to lack access to broadband Internet and cellular connectivity [19]. Inspired by previous observations of community content similarity in tribal networks, we ...