A5043587486- Soil Moisture and Remote Sensing
- Geophysical Methods and Applications
- Landslides and related hazards
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Seismic Waves and Analysis
- Soil and Unsaturated Flow
- Geophysical and Geoelectrical Methods
- Flood Risk Assessment and Management
- Hydraulic flow and structures
- Groundwater flow and contamination studies
- Water Systems and Optimization
- Cryospheric studies and observations
- Structural Health Monitoring Techniques
- Remote Sensing and LiDAR Applications
- Smart Materials for Construction
- Geotechnical Engineering and Underground Structures
- Marine and coastal ecosystems
- Infrastructure Maintenance and Monitoring
- Underwater Acoustics Research
- Advanced Fiber Optic Sensors
- Landfill Environmental Impact Studies
- Microwave and Dielectric Measurement Techniques
- Methane Hydrates and Related Phenomena
- Tree Root and Stability Studies
- GaN-based semiconductor devices and materials
National Central University
2015-2023
Disaster Prevention & Water Environment Research Center
2004-2016
National Yang Ming Chiao Tung University
2005-2016
National Taiwan University
2015
National Taiwan Ocean University
1996-2014
Kaohsiung Veterans General Hospital
2010
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 140:199-205 (1996) - doi:10.3354/meps140199 Influences of cyclones on chlorophyll a concentration and Synechococcus abundance in subtropical western Pacific coastal ecosystem Chang J, Chung CC, Gong GC The effects tropical seasonal variations phytoplankton biomass were studied at station northern coast...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 448:39-49 (2012) - DOI: https://doi.org/10.3354/meps09490 Effect of Typhoon Morakot on microphytoplankton population dynamics in subtropical Northwest Pacific Chih-Ching Chung1,2,*, Gwo-Ching Gong1,2, Chin-Chang Hung1,3 1Institute Environmental Chemistry and Ecology, 2Center Excellence for Bioenvironment...
Measurement of electrical conductivity by time domain reflectometry (TDR) requires knowledge the source step voltage, which is often implicitly accounted for in measured reflection coefficient. Errors may arise, however, from imperfect amplitude calibration when transforming voltage signal into coefficient signal. This instrument error was identified as a considerable addition to cable resistance TDR measurements. The effect due theoretically examined direct current circuit model and...
Scour monitoring is crucial for providing early warning of bridge safety and extending the knowledge scour process. Traditional methods that rely on underwater instruments encounter difficulties in installation operation harsh fluvial environment. Time domain reflectometry (TDR)-based sensing wire was recently introduced as a promising technique to improve field deployment durability. This study focused further improving concept TDR better sensor package performance. An innovative bundled...
When measuring soil water content by time domain reflectometry (TDR), several methods are available for determining the related apparent dielectric constant ( K a ) from TDR waveform. Their influencing factors and effective frequencies have not been extensively investigated results obtained different critically compared. The purpose of this study was to use numerical simulations systematically investigate effects electrical conductivity, cable length, dispersion on associated frequency. Not...
Methods accounting for cable resistance in time domain reflectometry (TDR) based electrical conductivity measurements remain controversial, and the effect of TDR recording has been underrated when long cables are used. A comprehensive full waveform model direct current (DC) analysis were used to show correct method taking into account guidelines selecting proper time. The Castiglione–Shouse scaling was found be incorrect because on steady‐state reflection coefficient is nonlinear. To...
Time domain reflectometry (TDR) technology has become a valuable tool for detecting displacements and locating shear planes in rock or soil slopes. It is based on transmitting an electromagnetic pulse into coaxial cable grouted mass watching reflections of this transmission due to deformity induced by the ground deformation. Early detection localized deformation soft soils quantifying displacement using TDR remains challenging work. The response affected resistance, soil-grout-cable...
Abstract To better characterize a bulk soil electrically, both the electrical conductivity and dielectric permittivity should be measured. This study developed time domain reflectometry (TDR) penetrometer to allow simultaneous measurements of during cone penetration. A TDR is formed by placing multiple-conductor waveguide around nonconducting shaft. Probe design considerations calibration methods for measuring constant were first theoretically discussed then evaluated through laboratory...
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 72:227-240 (2014) - DOI: https://doi.org/10.3354/ame01697 Diversity and abundance of haptophytes in East China Sea Yun-Chi Lin1, Chih-Ching Chung2,3, Gwo-Ching Gong2,3,4, Kuo-Ping Chiang1,2,3,* 1Institute Environmental Biology Fishery Science, National Taiwan Ocean University, Keelung 20224, Taiwan, ROC 2Institute Marine...
This study introduced two major contributions for freeway health monitoring during the pipe roof construction and subsequent excavation to enlarge an existing underpass. First, a horizontal-plane settlement indication system (HSIS) was developed monitor inevitable due shallow overburden above steel pipes. Second, experience gained from field program detailed with emphasis on encountered problems countermeasures safety decision-making. On basis of microelectromechanical systems tilt sensors...
Scour is a major threat to bridge safety, especially in harsh fluvial environments. Real-time monitoring of scour still very limited due the lack robust and economic device. Time domain reflectometry (TDR) an emerging waveguide-based technique holding great promise develop more durable devices. This study presents new types TDR sensing waveguides forms either rod or wire, taking into account measurement range, durability, ease field installation. The composed hollow grooved steel paired up...
The landslide monitoring method that uses the Sentinel 1A Interferogram Synthetic Aperture Radar (InSAR) through Stanford Method for Persistent Scatterers (StaMPS) is a complimentary but complex procedure without exact guidelines. Hence, this paper delivered parametric test by examining optimal settings of Scatterer (PS)- and Small Baseline Subset (SBAS)-InSAR using StaMPS compared to Global Navigation Satellite Systems (GNSS) in cases. This study first revealed parameters with suggested...
Time domain reflectometry (TDR) has become an effective nondestructive testing method for soil-nailing inspection. Previous studies utilized a preinstalled, single-core, electric wire alongside the rebar within soil nail. Measurements may be affected by possible grout defects and excessively overestimate length if is coiled around rebar. An improved TDR waveguide corresponding decoupled data reduction (for both soil-nail determination condition inspection) are proposed herein. The...
Abstract A TDR penetrometer was introduced to allow simultaneous measurements of dielectric permittivity and electrical conductivity during cone penetration. This study focused on the theoretical development experimental evaluation measurement using penetrometer. Theoretical takes into account cable resistance nonconducting shaft, leading a new data reduction equation calibration procedure. Measurement sensitivity spatial sampling bias were experimentally evaluated for various probe...
Ensuring high quantity and quality of water for humans is becoming more important because the supply risks in extreme climates. With increasing urbanization, urban resource management increasingly important. The hydrologic analysis pipelines can help decision-makers understand pressure, flow rate, quality, possible leakages, extending feasible strategies sustainable development smart cities. In this study, an improved model was built by integrating connectivity graph theory geographic...