Hsieh C.-H.,Chihlee Institute of Technology |
Feng C.-M.,National Chiao Tung University
Environment and Planning A | Year: 2014
Road networks are instrumental in resource allocation and preevacuation, and profoundly affect disaster response and recovery, particularly emergent-disaster logistics and island rescues. Disruptions to road networks impair daily operations, irrespective of whether they are damaged by external forces or failures in interacting elements. However, functional interdependency is absent from transportation vulnerability assessments. This study thus constructed a framework to assess the interdependent vulnerability of road network failures. Based on eleven fragile factors developed in the literature and an empirical case study in the Taipei metropolitan area, road network vulnerability is determined by fuzzy cognitive maps and geographic information systems for functional and spatial interactions, respectively. The analytical results indicate that road network vulnerability is underestimated if the interdependency is neglected. Delay time on the shortest substitution, level of service on adjacent links, and inaccessibility to hospital emergency centers significantly affect vulnerability. Whereas certain socioeconomic resilience is performed in the short term, spatial-functional interdependency dilutes those effects in the long term. The framework developed facilitates decision makers in understanding interdependent vulnerabilities and adopting appropriate strategies to improve vulnerability.
Lee C.-H.,Chihlee Institute of Technology |
Liao C.-J.,National Taiwan University of Science and Technology |
Chung T.-P.,Jilin University
International Journal of Production Economics | Year: 2014
This paper considers a real-life identical parallel scheduling problem originating from the manufacturing plant producing polyvinyl chloride leather products. In the considered scheduling problem, each job has some attributes and each attribute has several different levels. Because there is at least one different level of attribute between two adjacent jobs, it is necessary to make a setup adjustment whenever there is a switch from processing a job to a different job on each machine. The problem can be classified as a scheduling problem to minimize the makespan on two identical parallel machines with multi-attribute setup times. A constructive heuristic, named COIT, is first proposed for the problem and evaluated by comparing with the current scheduling method used by the case plant. To further improve the solution, a variable neighborhood search (VNS) metaheuristic is presented and compared with a mixed integer programming model. The computational results show that the COIT heuristic outperforms the current scheduling method with a significant improvement, and the VNS can further improve the solution. © 2014 Elsevier B.V. All rights reserved.
Lin J.-P.,Chihlee Institute of Technology |
Fu J.-M.,Cheng Shiu University
International Journal of Network Security | Year: 2013
Going along with the rapid development of web technologies, in some applications on demands, partners or sta®s may make a great quantity of web transactions or personal communications anytime and anywhere. However, the partners could be distributed over di®erent network domains. They require a communal trusted third party to help them establish a shared session key for future communications. In addition, from the privacy or security point of view, the partners hope that their transactions patterns or movements are not recorded from any external eavesdropper. However, this privacy issue has never been addressed in previous literature. In this paper, we first propose a three-party key agreement scheme to construct a secure transaction mechanism with privacy protection. In our scheme, the major merits include: (1) prevention of some known attacks; (2) satisfaction of the perfect forward secrecy; (3) security against the session state reveal; (4) privacy protection; (5) no sensitive veri-er table; an d(6) low communication and computation cost.
Chung L.-Y.,Chihlee Institute of Technology
Proceedings - 26th IEEE International Conference on Advanced Information Networking and Applications Workshops, WAINA 2012 | Year: 2012
Learning in a virtual context makes good use of online resources. It embodies an ideal blend of learning and digital technology. The question is how an English course should be designed to incorporate virtual reality and effectively promote motivation among vocational school students to inspire them to actively learn English via online resources. According to many studies, online virtual reality not only transforms one-way lectures into two-way interactions, it also changes the single-track approach that characterizes traditional teaching into a hybrid learning that takes place both within the classroom and online. Virtual learning platforms are convenient and expand learning by transcending space and time constraints. While the traditional classroom setting allows direct interaction so teachers could keep track of students progress, the virtual context provides students with opportunities to remedy their studies and carry out self-learning. The study is built upon autonomous language learning theories. Subjects of the study are first year students. A virtual platform for English learning is built, which combines actual classroom and work scenarios. Students are able to practice common workplace language in the virtual context of Second Life. The study ends by proposing some strategies for learning and teaching professional English at work. © 2012 IEEE.
Wu S.-C.,Chihlee Institute of Technology |
Fang W.,National Taipei University
Technovation | Year: 2010
Prior studies have indicated that innovative ideas can originate either from intra-sector interactions or from outer-sector interactions (e.g., company-to-customer). However, idea generation in virtual brand communities seems still lacking of empirical research, even though it has become a remarkable issue nowadays. This paper, therefore, investigates the relationship between consumer-to-consumer (C2C) interaction, brand knowledge, and idea generation in virtual brand communities. Our hypotheses are tested on the basis of the analysis of data collected from 228 members of the Mondeo On-line Club in Taiwan. The results indicate that C2C interaction is positively associated with idea generation. The hierarchical moderated regression analysis reveals that "human capital" exerts a significant moderating effect and "brand knowledge" has a partial but significant mediating effect on the relationship between C2C interactions and idea generation. © 2010 Elsevier Ltd. All rights reserved.
Hsieh C.-H.,Chihlee Institute of Technology
Natural Hazards | Year: 2014
Global environmental changes have led to frequent occurrences of climatic extremes. The increasingly frequent and high-magnitude natural disasters in Taiwan have caused significant mortality, injury, and property damage. In response, there have been requests to improve the capacity to cope with extreme climatic conditions through increased awareness and identification of vulnerability. Disruptions to transportation systems affect the resilience for sustaining daily operations. Among the various types of transportation systems, ports provide substantial employment and industrial activity, contributing to national and regional development. In addition, ports integrate the functions of supply chains such as services in logistics, information, and business, becoming the location of industrial clusters. Therefore, this study examines the risk of port failures from the perspective of vulnerability. Specifically, seven vulnerable factors derived from the extant literature and lessons learned from the previous disaster cases are evaluated using geographic information systems. The results reveal that port capacity and efficiency have a significant effect on port vulnerability in which the efficiency of gantry cranes, labor productivity, free trade zone business volume, and ground access networks play crucial roles in port failure. Moreover, the risks associated with port operation are evaluated by overlapping a hazard map of areas prone to debris flows and tsunami inundation. The risk maps can assist decision makers in understanding the vulnerability and adopting appropriate strategies to minimize disaster risks. © 2014, Springer Science+Business Media Dordrecht.
Wang Y.-H.,Chihlee Institute of Technology
Mathematical Problems in Engineering | Year: 2014
This paper developed an adaptive Business English self-learning system for EFL vocabulary learning. The components of word reoccurrence and learner engagement have been built into the system where the amount of unknown word reexposure in various customized texts increases and vocabulary enhancement tasks are added to promote learner engagement with wanted words. To evaluate the system effectiveness on EFL vocabulary learning, the experimental group read system-screened texts with immediate and repeated contacts with individuals' unknown words and performed vocabulary tasks specific to those unknown words, while the control group read online texts without unknown word reoccurrence and vocabulary practice. After one semester, these two groups were measured by one online vocabulary test, and an online user satisfaction investigation was also administered to the experimental group. The study found that the experimental group reading customized texts to reexpose to previously encountered unknown words in different texts along with doing individualized vocabulary exercises performed significantly better in EFL vocabulary learning than the other group. It was also found that the system was appealing for the learners to show positive attitudes toward the use of the system. The study demonstrated that the constructed adaptive Business English self-learning system could effectively promote vocabulary growth. © 2014 Yen-Hui Wang.
Chung L.-Y.,Chihlee Institute of Technology
International Journal of Digital Content Technology and its Applications | Year: 2012
The study aims to explore changes in learning outcome after using virtual reality instruments as teaching materials for college English courses, specifically, how digital environment affects the performance and motivation among undergraduates. Virtual reality has been widely applied in education settings. Its interactive interfaces provide students with realistic experiences and simulated everyday situations in a three-dimensional context for more authentic practice. The study focuses on the effect of incorporating Second Life, a virtual reality system, into college English classes. A semi-experiment is conducted in which an experimental group is taught with Second Life system, while the control group receives conventional one-way lectures. Result of the study shows significant improvement in the group of first year students who were taught using virtual characters. In addition, using virtual reality as teaching aids greatly improves students' performance and motivation. Both the process and the result of the study imply potential benefit in using virtual systems and characters to improve language pedagogy and learner's motivation respectively. The study proposes that virtual reality be incorporated into advanced English courses as a way to provide contextualized language learning.
Tsai H.-H.,Chihlee Institute of Technology
Expert Systems with Applications | Year: 2013
Knowledge management (KM) and data mining (DM) have become more important today, however, there are few comprehensive researches and categorization schemes to discuss the characteristics for both of them. Using a bibliometric approach, this paper analyzes KM and DM research trends, forecasts and citations from 1989 to 2009 by locating headings "knowledge management" and "data mining" in topics in the SSCI database. The bibliometric analytical technique was used to examine these two topics in SSCI journals from 1989 to 2009, we found 1393 articles with KM and 1181 articles with DM. This paper implemented and classified KM and DM articles using the following eight categories - publication year, citation, country/territory, document type, institute name, language, source title and subject area - for different distribution status in order to explore the differences and how KM and DM technologies have developed in this period and to analyze KM and DM technology tendencies under the above result. Also, the paper performs the K-S test to check whether the distribution of author article production follows Lotka's law. The research findings can be extended to investigate author productivity by analyzing variables such as chronological and academic age, number and frequency of previous publications, access to research grants, job status, etc. In such a way characteristics of high, medium and low publishing activity of authors can be identified. Besides, these findings will also help to judge scientific research trends and understand the scale of development of research in KM and DM through comparing the increases of the article author. Based on the above information, governments and enterprises may infer collective tendencies and demands for scientific researcher in KM and DM to formulate appropriate training strategies and policies in the future. This analysis provides a roadmap for future research, abstracts technology trend information and facilitates knowledge accumulations, therefore the future research can concentrated in core categories. This implies that the phenomenon "success breeds success" is more common in higher quality publications. © 2013 Elsevier B.V. All rights reserved.
Chung L.-Y.,Chihlee Institute of Technology
Advanced Materials Research | Year: 2012
Interaction, sharing, and connection are at the heart of Web 2.0, giving rise to innovative online media usage and the concept social networking that have transformed not only the network behavior of the masses, but also the form of online learning. In college English learning courses, Web 2.0 provides real-time and easily-accessible online resources for students to search for the information they need, granting them more autonomy in the English learning process. Meanwhile, Web 2.0-based network tools and video-sharing platform, such as Wikipedia and podcasts, provide a user-oriented and user-centered mechanism that allows personal creation, cooperative creation, interactive social networking, and peer-to-peer mutual learning, as an extension to the scope of autonomous English learning. In addition, with the rising popularity of Web 2.0-inspired social networking sites like Facebook, Twitter and blogs, the concept of social networking should also be increasingly incorporated into language education, since it promotes online interactions among English learners, while facilitating the establishment of information sharing, data query, and learning partnership in the network learning community. Thus, this project exploits Web 2.0-based online learning as the framework to design freshman English materials fusing social learning elements, for the purpose of boosting students' interests for enhanced learning effectiveness, expanding e-learning into s-learning. © (2012) Trans Tech Publications, Switzerland.