Chia-Tai Chan

ORCID: 0000-0003-0995-601X
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Context-Aware Activity Recognition Systems
  • Network Packet Processing and Optimization
  • Software-Defined Networks and 5G
  • Network Traffic and Congestion Control
  • Non-Invasive Vital Sign Monitoring
  • Atmospheric chemistry and aerosols
  • Network Security and Intrusion Detection
  • Advanced Optical Network Technologies
  • Indoor and Outdoor Localization Technologies
  • Gait Recognition and Analysis
  • Interconnection Networks and Systems
  • Atmospheric Ozone and Climate
  • Air Quality and Health Impacts
  • Balance, Gait, and Falls Prevention
  • Hand Gesture Recognition Systems
  • Atmospheric and Environmental Gas Dynamics
  • Mobile Agent-Based Network Management
  • Internet Traffic Analysis and Secure E-voting
  • IPv6, Mobility, Handover, Networks, Security
  • Vehicle emissions and performance
  • Air Quality Monitoring and Forecasting
  • Muscle activation and electromyography studies
  • Wireless Networks and Protocols
  • Osteoarthritis Treatment and Mechanisms
  • Advanced Wireless Network Optimization

National Yang Ming Chiao Tung University
2016-2025

Shenzhen Technology University
2024

National Yang Ming University Hospital
2008-2019

Institute of Earth Environment
2018

Chinese Academy of Sciences
2016-2018

Genome Institute of Singapore
2017

Institute of Semiconductors
2016

The Royal Free Hospital
2016

University College London
2016

Institute of Molecular Biology and Biophysics
2013

Patient monitoring systems are gaining their importance as the fast-growing global elderly population increases demands for caretaking. These use wireless technologies to transmit vital signs medical evaluation. In a multihop ZigBee network, existing usually broadcast or multicast schemes increase reliability of signals transmission; however, both lead significantly higher network traffic and end-to-end transmission delay. this paper, we present reliable protocol based on anycast routing...

10.1109/titb.2011.2171704 article EN IEEE Transactions on Information Technology in Biomedicine 2011-10-13

Since the knee joint bears full weight load of human body and highest pressure loads while providing flexible movement, it is part most vulnerable susceptible to osteoarthritis. In exercise therapy, early rehabilitation stages last for approximately six weeks, during which patient works with physical therapist several times each week. The afterwards given instructions continuing by him/herself at home. This study develops a assessment mechanism using three wearable sensors mounted on chest,...

10.3390/s150204193 article EN cc-by Sensors 2015-02-12

Total knee arthroplasty (TKA) is the most common treatment for degenerative osteoarthritis of that articulation. However, either in rehabilitation clinics or hospital wards, range motion (ROM) can currently only be assessed using a goniometer. In order to provide continuous and objective measurements ROM, we propose use wearable inertial sensors record ROM during recovery progress. Digitalized data assist surgeons control status flexibly adjust programs early acute inpatient stage. The more...

10.3390/s17020418 article EN cc-by Sensors 2017-02-22

Accidental falls are common causes of serious injury and health threats in the elder population. To deliver adequate medical support, robust immediate detection is important. Since fall elderly remains a major challenge public domain, effective fall-detection will provide urgent support dramatically reduce cost care. In this work, we propose fall-detecting system placing an accelerometer on head level using algorithm to distinguish between daily activities. The experimental results have...

10.1109/icbbe.2008.669 article EN 2008-05-01

Falls are a leading health risk for the elderly. Various wearable-based fall detection systems based on machine learning models have been developed to provide emergency alarms and services improve safety health-related quality of life. To support long-term healthcare services, appropriate sampling rate, which plays vital role in system, must be investigated guarantee performance accuracy energy efficiency. Intuitively, decreasing rate sensor nodes can computing savings. However, there is...

10.1109/jsen.2018.2872835 article EN IEEE Sensors Journal 2018-10-01

Falls are the primary cause of accidents for elderly in living environment. Reducing hazards environment and performing exercises training balance muscles common strategies fall prevention. However, falls cannot be avoided completely; detection provides an alarm that can decrease injuries or death caused by lack rescue. The automatic system has opportunities to provide real-time emergency alarms improving safety quality home healthcare services. Two technical challenges also tackled order a...

10.3390/s17020307 article EN cc-by Sensors 2017-02-08

Tropospheric ozone (O 3 ) enhancements have been continuously observed over Hong Kong. We studied the O enhancement events and assessed their relation to springtime maximum in lower troposphere Kong using a 6‐year (1993 1999) ozonesonde data set. identified source regions of biomass burning emission, established chemical transport characteristics ‐rich air masses enhanced profiles satellite imagery, trajectory trace gas measured on board DC‐8 aircraft during PEM‐West‐B experiment. total 39...

10.1029/2001jd001555 article EN Journal of Geophysical Research Atmospheres 2003-01-09

As part of the Transport and Chemical Evolution over Pacific (TRACE‐P) mission, ozonesondes were used to make ozone vertical profile measurements at nine locations in North Pacific. At most sites there is a multiyear record observations. From western (Hong Kong; Taipei; Jeju Island, Korea; Naha, Kagoshima, Tsukuba, Sapporo, Japan), site central (Hilo, Hawaii), on west coast United States (Trinidad Head, California) both seasonal event specific picture tropospheric emerges. Ozone profiles...

10.1029/2003jd003466 article EN Journal of Geophysical Research Atmospheres 2004-05-19

With the advances in information and communication technologies, wireless sensor networks has made Ambient Intelligence (AmI) applications possible that can monitor situation around persons or objects give certain responses for their needs. The location awareness is an important technology AmI applications. advantages of ZigBee such as low cost, high scalability, availability supporting dynamic routing topology make more suitable indoor system. In this research, we propose a ZigBEe-bAsed...

10.1016/j.procs.2011.07.010 article EN Procedia Computer Science 2011-01-01

Both the Yangtze River Delta (YRD) and Pearl (PRD), two most rapidly developing areas in eastern China, have suffered from serious air pollution, thus, numerous investigations were devoted to studying these problems. Other China received less attention despite similar rapid development their industries economy. In this study, we analyzed air‐quality data Kinmen Island (24°27′26″N, 118°19′36″E) located off Fujian Province between above‐mentioned deltas. Our results clearly show that study...

10.1029/2009jd013641 article EN Journal of Geophysical Research Atmospheres 2010-09-14

Abstract The needs for light-weight and soft smart clothing in homecare have been rising since the past decade. Many textile sensors developed applied to automatic physiological user-centered environmental status recognition. In present study, we propose wearable multi-sensor monitoring based on an economic fabric electrode with high elasticity low resistance. integrated heterogeneous is capable measure multiple human biosignals (ECG respiration), acceleration, gyro information. Five...

10.1007/s40846-017-0247-z article EN cc-by Journal of Medical and Biological Engineering 2017-07-01

The aging of society is a global concern nowadays. Falls and fall-related injuries can influence the elderly’s daily living, including physical damage, psychological effects, financial problems. A reliable fall detection system trigger an alert immediately when event happens to reduce adverse effects falls. Notably, wrist-based provides most acceptable placement for elderly; however, performance worst due complicated hand movement modeling. Many works recently implemented deep learning...

10.3390/s25072168 article EN cc-by Sensors 2025-03-29

Falls are the major risks and threats among elderly population. Various studies have developed automatic critical fall detection systems for emergency alarms medical services. Window sizes segmentation approaches would affect system performance in terms of power consumption, computational speed reliability that essential considerations real-world implementation. Intuitively, employing shorter window simpler leads to a faster better efficiency. However, few works explore effects windowing...

10.1109/jsen.2019.2955141 article EN IEEE Sensors Journal 2019-11-22

Falls are the primary cause of accidents among elderly and frequently fatal non-fatal injuries associated with a large amount medical costs. Fall detection using wearable wireless sensor nodes has potential improving telecare. This investigation proposes ZigBee-based location-aware fall system for telecare that provides an unobstructed communication between caregivers when falls happen. The is based on networks, node consists motherboard tri-axial accelerometer ZigBee module. A worn waist...

10.3390/ijerph110404233 article EN International Journal of Environmental Research and Public Health 2014-04-16

Total knee arthroplasty (TKA) is one of the most common treatments for people with severe osteoarthritis (OA). The accuracy outcome measurements and quantitative assessments perioperative TKA an important issue in clinical practice. Timed up go (TUG) tests have been validated to measure basic mobility balance capabilities. A TUG test contains a series subtasks, including sit-to-stand, walking-out, turning, walking-in, turning around, stand-to-sit tasks. Detailed information about subtasks...

10.3390/s20216302 article EN cc-by Sensors 2020-11-05

In the last two decades, fall detection (FD) systems have been developed as a popular assistive technology. To support long-term FD services, various power-saving strategies implemented. Among them, reduced sampling rate is common approach for an energy-efficient system in real world. However, performance of diminished owing to low-resolution (LR) accelerometer signals. improve accuracy with LR signals, several technical challenges must be considered, including mismatch effective features...

10.1109/tcds.2021.3116228 article EN cc-by IEEE Transactions on Cognitive and Developmental Systems 2021-09-29

Substantial enhancement of ozone was frequently observed in the lower troposphere (2.5–6.0 km) over Hong Kong (22.2°N, 114.3°E). Most these enhanced layers (with peak concentration up to 138 ppbv) feature moderate and high relative humidity (50–100%) a temperature inversion at bottom layer. These phenomena predominantly occur spring (late February mid April) coinciding with dry season Southeast Asia. Back air trajectories showed that ozone‐rich masses had passed through Indo‐Burma region...

10.1029/1999gl010855 article EN Geophysical Research Letters 2000-05-15
Coming Soon ...