Latest papers from Rong-Hao Liang
Breathing exercises and Progressive Muscle Relaxation (PMR) have complementary effects, making their integration a common practice among relaxation techniques. While numerous virtual reality (VR) exercises support breathing exercises in self-training, integrating breathing support into PMR in VR presents challenges, i…
Collective stress is the stress within a group or an organization. It affects individuals' well-being and group productivity. HCI research has started exploring collective stress visualization to facilitate group awareness and collective coping via testing prototypes in controlled settings. However, an in-depth unders…
This paper presents TexonMask, a facial expression recognition system using lightweight electrode-augmented commodity facemasks. With a matrix of textile electrodes carefully deployed on a commodity mask, our edge computing system recognizes the wearer's facial expressions with machine learning based on the capacitive…
In this paper, we propose NFCStack, which is a physical building block system that supports stacking and frictionless interaction and is based on near-field communication (NFC). This system consists of a portable station that can support and resolve the order of three types of passive identifiable stackable: bricks, b…
This paper presents NFCSense, a data-defined rich-ID motion sensing technique for fluent tangible interaction design by using commodity near-field communication (NFC) tags and a single NFC tag reader. An NFC reader can reliably recognize the presence of an NFC tag at a high read rate (~300 reads/s) with low latency, b…
This research investigates the design space of combining touchscreens with passive rich-ID building block systems to support the physical construction of contexts in touchscreen interactions. With two proof-of-concept systems, RFIPillars and RFITiles, we explore various schemes for using tangible inputs for context en…
Mechanical pushbuttons, which provide physical landmarks and clear tactile feedback, are easily accessible and highly reliable in eyes-free use. Potentially, their merits can improve the experiences of on-body or wearable HCI. However, they are not commonly adopted as a user interface of smart textiles because the phy…
We present RFIBricks, an interactive building block system based on ultrahigh frequency radio-frequency identification (RFID) sensing. The system enables geometry resolution based on a simple yet highly generalizable mechanism: an RFID contact switch, which is made by cutting each RFID tag into two parts, namely anten…
This paper presents BioFidget, a biofeedback system that integrates physiological sensing and display into a smart fidget spinner for respiration training. We present a simple yet novel hardware design that transforms a fidget spinner into 1) a nonintrusive heart rate variability (HRV) sensor, 2) an electromechanical…
This paper presents a technique enabling distributed batteryless near-field identification (ID) between two passive radio frequency ID (RFID) tags. Each conventional ultra-high-frequency (UHF) RFID tag is modified by connecting its antenna and chip to a reed switch and then attaching a magnet to one of the reed switch…
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