Browsing by Author "Chen, Shih-Chieh"

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A COMMON CYCLE APPROACH FOR SOLVING THE ECONOMIC LOT AND INSPECTION SCHEDULING PROBLEM
(2012-02-01)
Yao, Ming-Jong
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Chen, Shih-Chieh
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Chang, Yu-Jen
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運輸與物流管理系註：原交通所+運管所
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Department of Transportation and Logistics Management
In this study, we consider an imperfect production system in which the manager not only faces the Economic Lot Scheduling Problem, but also needs to conduct multiple inspections during a production lot of any product. Inspection plays an important role in an imperfect production system since it saves the cost from producing and restoring defective items though it also incurs extra inspection cost at the same time. In this study, we employ the common cycle approach in which all the products share the same replenishment cycle, and adopt a consensus inspection policy. The focus of this study is to determine the optimal cycle time and an optimal production and inspection schedule that minimize the total cost per unit time. We formulate a mathematical model in which we take into accounts both the production capacity and inspection capacity constraints. Also, we conduct full theoretical analysis and propose an effective search algorithm for solving an optimal solution. Our numerical experiments demonstrate the effectiveness of the proposed search algorithm.
Emotions in fear appeals: Examining college students' attitudes and behavioural intentions towards colorectal cancer prevention in Taiwan
(1970-01-01)
Li, Shu-Chu Sarirna
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Lu, Pei-Chi
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Chen, Shih-Chieh
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傳播研究所
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Institute of Communication Studies
Objectives: One criticism of the extended parallel process model (EPPM) is its lack of focus on the role of emotion and its relation to behaviour change. Another criticism of the EPPM is regarding its proposition that threat and efficacy have a moderating effect on recipients' attitudes and behaviours. This study aimed to examine emotions and the interaction effects of threat and efficacy to understand their effects on attitudes and behavioural intentions towards colorectal cancer prevention. Methods: The study adopted a pretest-posttest experimental design to collect data from a sample of college students. There were 631 participating students, but the total number of eligible subjects in this study was 402 students. Findings: Analysis shows that (1) anxiety plays a significant role in the reception of fear-appeal messages because it not only directly influences behavioural intentions but is also a full mediator in allowing perceived threat to affect intentions; (2) emotions influence subjects' behavioural intentions but not their attitudes; and (3) perceived threat is more effective in changing subjects' attitudes, while perceived efficacy is more influential in changing behavioural intentions. Conclusion: This study found that it was anxiety rather than fear that made a positive contribution to the effectiveness of fear-appeal messages. These findings showed that the high-threat/high-efficacy group achieved the best persuasive outcomes, followed by the high-threat/low-efficacy and the low-threat/high-efficacy group. The low-threat/low-efficacy group obtained the least persuasive results, which supports the additive model of the EPPM.