Ji-Yuan Lin

Chaoyang University of Technology, Taiwan · Department of Construction Engineering

Green infrastructure has been shown to play the role of adaptation and adjustment under the effect of harsh climate. The creation of urban green infrastructure is an important indicator of sustainable urban development, and determining the cost-effectiveness of green infrastructure is a necessary step to help investment decisions. The whole economi...

The areas around the Ching-Shuei River saw numerous landslides (2004–2017) after the Jiji earthquake, profoundly harming the watershed’s geological environment. The 33 catchment areas in the Ching-Shuei River watershed and five typhoon and rainstorm events, with a total of 165 occurrences and non-occurrences, were analyzed, and the training and val...

Taiwan’s mountains are steep, geologically dispersed, and their hillsides are over-utilized. Serious debris flow disasters are prone to happen whenever monsoons or typhoons bring a lot of rain. Typhoon Morakot’s large-scale landslide in 2009, which devastated half of Xiaolin Village and claimed around 500 lives, is one such instance. Large-scale la...

Taiwan is located in the subtropical monsoon region. Typhoons, earthquakes, and rainfall have historically been the most serious natural disasters affecting the region, especially its geologically sensitive mountain settlements. The heavy rain associated with typhoons can readily cause large-scale compound disasters such as landslides, rockfalls, a...

The purpose of this study is to establish a method of hazard assessment for the river terraces along the Chenyulan River and use 40 of them as protected objects. Using a geographic information system, the researchers extracted nine parameters for such terraces. These are length to attack shore, distance away from fault, distance from river channel,...

In recent years, an increase in extreme rainfall events linked to global warming has led to increases in the number and intensity of disasters such as landslides, landslips, and debris flows in Taiwan. This study focuses on the impact of such events, especially during typhoons, on County Road 89: the main traffic artery in Renai Township, Nantou Co...

The study attempts to investigate factors affecting the semester break and dropouts in a case University in order to achieve maximum retention and graduation rates. The data were collected from the official records of the day system of the 22 Departments in five colleges in two semesters. Also, we collected 2,402 records of grade point average of d...

In order to understand how the advantages of internship programs influence the undergraduates, this study evaluated seniors’ experiences with the internship program in marketing and logistics management department at the case university. Through the University Career and Competency Assessment Network (UCAN) system, we used Deming’s ‘plan-do-check-a...

In order to understand how the advantages of internship programs influence the undergraduates, this study evaluated seniors' experiences with the internship program in marketing and logistics management department at the case university. Through the University Career and Competency Assessment Network (UCAN) system, we used Deming's 'plan-do-check-a...

For energy conservation and CO2 emission reduction, renewable energy facilities, such as solar equipments and rooftop gardens, are considered effective for energy management of institutional buildings in a community. This study integrated an energy mixture facility model with a nondominated sorting genetic algorithm-II optimizer as a multiobjective...

The objective of this research is to study the impacts of slope disasters in mountain areas in central Taiwan under extreme weather conditions. The failed slopes in these areas were identified, synthesized and investigated. Several road and slope failures had occurred in high terrace deposits, classified as gravel formation GP. The soil water chara...

Eight non-plastic soils with different gradation are used for this research to study the appropriate choice of soil-cement mixture for a earth and rock-fill dam construction project. The properties of soil-cement materials are influenced by several factors, including type and proportion of soil, cementitious materials, water content, compaction, un...

Typhoon Mindulle was the most severe typhoon across the Tachia River watershed following the 921 Chi-Chi earthquake, and resulted in extremely high precipitation of 1431mm that induced many landslides, debris flows, and debris floods in affected areas. This paper analyzes the debris flows in the Songhe area induced by Typhoon Mindulle by employing...

Typhoon Mindulle struck northeast Taiwan on July 2, 2004, and brought an abundant air current in the following days that caused serious flood disasters to the mountainous areas in central Taiwan. One of sever flood events during Typhoon Mindulle was about hundreds of hectares of farmland loss induced by an 1620m break of Shan-An levee at the Chenyu...

The essential work of sewer rehabilitation is a sewer inspection through diagnoses of sewer pipe defects. At present, image processing and artificial intelligence techniques have been used to develop diagnostic systems to assist engineers in interpreting sewer pipe defects on CCTV images to overcome human’s fatigue and subjectivity, and time-consum...

Gravel formation is the most common formation in Taichung area in Taiwan, where most of the gravels are hard and having high strength having strong interlock between gravels. Methods used for underground constructions in gravel formation are still under exploration due to lack of experience. Thus, the objective of this study is to focus on investig...

In this paper, an airborne hyper-spectral image, which has 218 bands within a range of spectral resolution from 427.2nm to 945.7nm, is used to classify the vegetation of Mountain Jou-Jou. However, redundant bands could not significantly increase the accuracy of vegetation classification, but increase the computation cost of pattern recognition. Thu...

Eutrophication is one of the major water quality problems in developing and developed countries. Generally, trophic state of water sources is under a strict watch and is determined by in situ water sampling for some important water resources. However, a limited number of water samples provide insufficient statistical confidence with an overall eutr...

This study aims to investigate experimentally the impact force of debris flows on slit dams. A site for investigation was selected at Song-Her Village, Taichung, Taiwan. Data on the characteristics of debris flows were recorded using various auto-recording instruments, such as earth pressure gages, load cells, and accelerometers. The grain-size dis...

370 sets of standard penetration test (SPT) data are collected and synthesized, including the liquefaction and non-liquefaction cases generated during the Chi-Chi (Mw=7.6) earthquake of September 21,1999 and the earthquake (Mw=6.9) of June 11, 2000 in Taiwan. Other data are adopted from previous studies and the database. An approach based on Artifi...

This paper aims to build an analytical process of assessing debris-flow hazards using multivariate analysis and geographic information system (GIS) techniques. The watershed of the Chen-Yu-Lan River is investigated in this study. Factors that are believed to be critical in the occurrence of debris flow are identified and considered in the assessmen...

The watershed of the Chen-You-Lan River is selected in this research as a site for assessing debris flow hazards. The purpose of the research is to develop an assessment process of debris flow hazards by means of multivariate analysis and geographic information system (GIS) techniques. By using the spatial analysis tools of GIS and software WinGrid...

This paper presents the results of a pilot study for assessing debris-flow hazards using geographic information system (GIS) techniques. The watershed of the Chen-Yu-Lan River is investigated in this pilot study. Factors that are believed to be critical to the occurrence of debris flow are identified and considered in the assessment of debris-flow...

We describe a new ranid frog, Rana multidenticulata sp. nov., from the montane areas of the Central Mountain Range of Taiwan. This species seems to be most closely related to R. sauteri which occurs in the western lowlands. These presumed sister taxa can be distinguished by oral features of tadpoles and several adult characters. Vocalization and la...

土石流防治較佳之對策為防止土石流災害於未然，欲達此目的，首先要調查土石流潛勢溪流，並判定其發生潛勢，以排定整治先後次序。由農委會公佈之土石流潛勢溪流係以防災之觀點為依歸，故評估之主要依據為保全對象之有無，保全對象之所在位置與公路的開發與否，將會影響所決定之潛勢溪流的數量與集水區面積甚巨，而未開發之山坡地，其土石流發生潛勢評估準則尚不夠明確。有鑑於上述問題，本研究重新考慮土石流潛勢溪谷集水區單元，以陳有蘭溪流域為對象，先不考慮保全對象，僅從學理上考慮土石流之發生潛勢。 本研究以地理資訊系統軟體ArcView與WinGrid、影像分析軟體ERDAS IMAGINE，建立影響因子基本資料庫，配合SPSS統計軟體進行影響因子之顯著性與獨立性檢定。經由兩獨立樣本檢定、相關性檢定與主成份分析，結果選定集...