8 citations · 25 across the 11 of their papers we have counts for
12 papers
picoRing dual: ultralow-power bimanual ring controllers for everyday AR
Hideaki Yamamoto, Yifan Li, Yoshihiro Kawahara +1
Advances in smart eyewear, such as AR glasses and HMDs, bring digital information into outdoor and public situations. However, traditional handheld controllers for hand interaction…
3D-Printing Water-Soluble Channels Filled with Liquid Metal for Recyclable and Cuttable Wireless Power Sheet
Takashi Sato, Ryo Takahashi, Kento Yamagishi +6
A recyclable and cuttable wireless power transfer (WPT) sheet is proposed, enabled by H-tree wiring and water-soluble channels filled with liquid metal (LM). Conventional 2D WPT sy…
Body-scale NFC for wearables: human-centric body-scale NFC networking for ultra-low-power wearable devices (Demo of UTokyo Kawahara Lab 2025)
Hideaki Yamamoto, Yifan Li, Wakako Yukita +4
Near Field Communication (NFC) is a promising technology for ultra-low-power wearables, yet its short communication range limits its use to narrow-area, point-to-point interactions…
Hierarchical resonators for localized charging in room-scale magnetoquasistatic wireless power systems
Takuya Sasatani, Alanson P. Sample, Yoshihiro Kawahara
Magnetoquasistatic wireless power transfer can deliver substantial power to mobile devices over near-field links. Room-scale implementations, such as quasistatic cavity resonators,…
Patched-Wall Quasistatic Cavity Resonators for 3-D Wireless Power Transfer
Takuya Sasatani, Yoshihiro Kawahara
Traditional wireless power transfer (WPT) systems are largely limited to 1-D charging pads or 2-D charging surfaces and therefore do not support a truly ubiquitous device-powering…
Full-body WPT: wireless powering with meandered e-textiles
Ryo Takahashi, Takashi Sato, Wakako Yukita +3
We present Full-body WPT, wireless power networking around the human body using a meandered textile coil. Unlike traditional inductive systems that emit strong fields into the deep…
Ultra-low-power ring-based wireless tinymouse
Yifan Li, Masaaki Fukumoto, Mohamed Kari +6
Wireless mouse rings offer subtle, reliable pointing interactions for wearable computing platforms. However, the small battery below 27 mAh in the miniature rings restricts the rin…
Full-body NFC: body-scale near-field sensor networks with machine-knittable meandered e-textiles
Ryo Takahashi, Changyo Han, Wakako Yukita +6
Wireless body networks comprising battery-free on-body sensors and textile-based wireless readers can enable daily health monitoring and activity tracking by continuously monitorin…
Wireless charging and readout via textile coil for continuous full-body wearable computing
Ryo Takahashi, Yoshihiro Kawahara
The growing use of wearable devices for activity tracking, healthcare, and haptics faces challenges due to the bulkiness and short lifespan of batteries. Integration of a textile-b…
Demo of picoRing mouse: an ultra-low-powered wireless mouse ring with ring-to-wristband coil-based impedance sensing
Yifan Li, Masaaki Fukumoto, Mohamed Kari +4
Wireless mouse rings offer subtle, reliable pointing interactions for wearable computing platforms, but the small battery below 27 mAh in the miniature rings restricts the ring's c…
Plug-n-play e-knit: prototyping large-area e-textiles using machine-knitted magnetically-repositionable sensor networks
Yifan Li, Ryo Takahashi, Wakako Yukita +7
Prototyping electronic textile (e-textile) involves embedding electronic components into fabrics to develop smart clothing with specific functionalities. However, this process is s…
Joint-repositionable Inner-wireless Planar Snake Robot
Ayato Kanada, Ryo Takahashi, Keito Hayashi +8
Bio-inspired multi-joint snake robots offer the advantages of terrain adaptability due to their limbless structure and high flexibility. However, a series of dozens of motor units…