• Environmental and Resource Economics Review
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• v.14 no.1
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• pp.1-24
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• 2005

One of the most important factors that determine the quality of a stated preference study is questionnaire design. This study introduces strategies for enhancing the rationality and testing for the validity of choice experiments(CE) using "example" choice questions that mimic the main choice questions. From the case study of WTP for reduced radon radiation exposures in the home, the study found that screening out irrational responses, 12% of the effective responses, resulted in a meaningful increase in model fit. Meanwhile the study tested for anchoring effects, as a way of confirming the divergent validity of the study, by looking at equality of models estimated for two subsamples. The overall test results were mixed. The pros and cons of the questionnaire design strategy employed are also reported.

• Journal of Industrial Convergence
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• v.21 no.7
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• pp.105-114
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• 2023

This study is a descriptive research study for clinical nurses to understand the relationship between career anchor, job embeddedness, career motivation and retention intention, and to identify factors that can affect retention intention. A study was conducted between November 1, 2022 and December 30, 2022 with 155 nurses from C and G Regional General Hospitals. Nurses' intention to work was statically correlated with job embeddedness and career motivation. A factor influencing nurses' intention to work was job embeddedness, and the explanatory power of the variable was 25%. We propose repeated studies that diversified the study subjects to identify nurses' career anchor types, which are influencing factors of nurses' job embeddedness, and follow-up studies to develop training and personnel management programs according to career anchor types and verify their effectiveness.

• Journal of Korea Multimedia Society
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• v.14 no.11
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• pp.1438-1449
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• 2011

UWSNs(Underwater Wireless Sensor Networks) need effective modeling fitted to the customized type of application and its covering area. In particular it requires an energy efficient data aggregation method for such customized application. In this paper, we envisage the application oriented model for monitoring the pollution or intrusion detection over a given underwater area. The suggested model is based on the honeycomb array of hexagonal prisms. In this model, the purpose of data aggregation is that the head node of each layer(cluster) receives just one event data arrived firstly and transfer this and its position data to the base station effectively in the manner of energy efficiency and simplicity without duplication. Here if we apply the existent data aggregation methods to this kind of application, the result is far from energy efficiency due to the complexity of the data aggregation process based on the shortest path or multicast tree. In this paper we propose three energy efficient and simple data aggregation methods in the domain of cluster and three in the domain of inter-cluster respectively. Based on the comparative performance analysis of the possible combination pairs in the two domains, we derive the best energy efficient data aggregation method for the suggested application.