• Korean Journal of Materials Research
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• v.17 no.8
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• pp.425-432
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• 2007

The microstructural evolution of ferritic 9Cr-1Mo-V-Nb steel, subjected to creep-fatigue at $550^{\circ}C$, was evaluated nondestructively by measuring the ultrasonic velocity. The variation of the ultrasonic velocity with the fatigue life fraction exhibited three regions. In the first region ($N/N_f$<0.2), a significant increase in the velocity was observed, followed by a slight increase between the fatigue life fractions of $0.2N_f$ and $0.8N_f$, and then a decrease in the final region. The change of the ultrasonic velocity during creep-fatigue was interpreted in relation to the microstructural properties. This study proposes an ultrasonic nondestructive evaluation method of quantifying the level of damage and microstructural change during the creep-fatigue of ferritic 9Cr-1Mo-V-Nb steel.

• Journal of the Korean Home Economics Association
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• v.46 no.5
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• pp.35-61
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• 2008

This study aimed at developing parent education program for family leisure for parents of adolescent children to enable them to pursue happy lives as healthy families with adequate balance of cohesiveness and adaptability and smooth communication between the members of their families after parent education for family leisure. Research procedure of parent education program for family leisure proceeded with establishment of theory and requirement survey through precedent research, design of program, practice of program, evaluation of program and suggestion of revised program model after evaluation. On the basis of evaluation results, parent education program for family leisure aiming at parents of adolescent children can conclusively be revised as follows. The first session aims at understanding of family leisure; the second session aims at improvement of learning effect through education & experience-oriented activities; the third session aims at understanding and paying regard to their children through hobby-oriented activities; the fourth session aims at improvement of social relations through society-oriented activities; the fifth session aims at helping children education through check of communication in family-oriented activities and home-visiting education for etiquette; and the sixth session, the final session, aims at providing information and knowledge on family leisure and letting them gain better understanding of adolescent children.

• Corrosion Science and Technology
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• v.6 no.1
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• pp.29-32
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• 2007

The final goal of this study is to develop the core technologies applicable to the design, operation and maintenance of welds in nuclear structures. This study includes predicting microstructure changes and residual stress for welded parts of nuclear power plant components. Furthermore, researches are performed on evaluating fatigue, corrosion, and hydrogen induced cracking and finally constructs systematically integrated evaluation system for structural integrity of nuclear welded structures. In this study, metallurgical and mechanical approaches have been effectively coordinated considering real welding phenomena in the fields of welds properties such as microstructure, composition and residual stress, and in the fields of damage evaluations such as fatigue, corrosion, fatigue crack propagation, and stress corrosion cracking. Evaluation techniques tried in this study can be much economical and effective in that it uses theoretical/semi-empirical but includes many additional parameters that can be introduced in real phenomena such as phase transformation, strength mismatch and residual stress. It is clear that residual stress makes great contribution to fatigue and stress corrosion cracking. Therefore the mitigation techniques have been approached by reducing the residual stress of selected parts resulting in successful conclusions.

• Elastomers and Composites
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• v.45 no.4
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• pp.245-249
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• 2010

Much interest on the thermoplastic elastomers (TPEs) has recently been attracted in commercial fields as well as scientific and applied research. The TPEs have their own characteristic area especially in relation with block copolymers as well as many other polymeric materials, since they show interesting features displayed by the conventional vulcanized rubber, and at the same time, by the thermoplastics. In addition, they are characterized by a set of interesting properties inherent to block and graft copolymers, variety of blends and vulcanized materials. The importance of TPE as organic materials can be evaluated by the number of published reports (papers, patents, technical reports, etc). For the suitable introduction of the TPE, historic, scientific, technical and commercial considerations should be taken into account. This review article starts with a brief discussion on historical considerations, followed by a introduction of the main preparations and analytical techniques utilized in chemical, structural, and morphological studies. The properties, processing tools, the position among organic materials, and applications of TPEs are also briefly reviewed. Finally, the most probable trends of their future development are discussed in a short final remarks.

• International Journal of Advanced Culture Technology
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• v.9 no.2
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• pp.64-71
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• 2021

The purpose of this study is to analyze the impact of participatory design workshops conducted to design forest play spaces that reflect young children's needs and demands on the development of spatial concepts in young children. As a research method for this purpose, we used the participatory design workshop (6 times) and Landscape Montage Techniques (LMT). We conducted this study at the "Songsan-mulbit Forest Experience Center for children (FECC)" located in Gwangsan-gu, Gwangju Metropolitan City, from the second week of May to third week of June 2018 for preschoolers in K-kindergarten (six and seven-year-old integrated classes; 41 preschoolers in total). We conducted the LMT evaluation on the same preschoolers before and after the workshop, and the drawings of 39 preschoolers drawn for LMT evaluation before and after the workshop were subject to the final evaluation. As a result of the study, the cognitive levels for the spatial concept after the workshop are higher than those for the spatial concept before the workshop, especially showed the result of comparing the LMT values of 6 age and 7 age, there were significant differences on pre and post workshop in p<0.01.

• Health Policy and Management
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• v.32 no.4
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• pp.380-388
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• 2022

Background: Emerging infectious diseases, such as Middle East respiratory syndrome or coronavirus disease 2019, pose a continuous threat to public health, making a risk assessment necessary for infectious disease control and prevention. Therefore, we aimed to investigate the risk assessment methods for infectious diseases used by major foreign countries and organizations. Methods: We conducted an investigation and comparative analysis of risk assessment and risk determination methods for infectious diseases. The risk assessment tools included the strategic toolkit for assessing risks, influenza risk assessment tool, pandemic severity assessment framework, and rapid risk assessment methodology. Results: The most frequently reported risk elements were disease severity, antiviral treatment, attack rate, population immunity, and basic productive ratio. The risk evaluation method was evaluated quantitatively and qualitatively by the stakeholders at each institution. Additionally, the final risk level was visualized in a matrix, framework, and x and y-axis. Conclusion: Considering the risk assessment tools, the risk element was classified based on the duplicate of each indicator, and risk evaluation and level of risk assessment were analyzed.

• The Research Journal of the Costume Culture
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• v.30 no.4
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• pp.529-547
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• 2022

The purpose of this study was to understand the concept, form, and structure of the bata de cola through an investigation of the history of the costume and a study of the suitability of its functional elements during performance of 'Caña Flamenco'. Traditionally, Flamenco dance dresses were made by Spanish women from the lower classes, and the 'upward flow' of the dresses represented the women's individuality and unique style. The bata de cola, which appeared later, was an evolution of the Flamenco dress that was influenced by costume styles and silhouettes of the 19th and early 20th centuries, and it was made famous by Flamenco dancers. For practical costume production, a Flamenco artist who had performed in Spain and Korea was proposed as a study participant. The study was conducted using a stepwise wearing evaluation method whereby the Flamenco artist wore prototype dresses and evaluated whether they were practical for the required dance movements or not. A final bata de cola pattern was derived after the experiment was repeated five times based on the feedback of the Flamenco artist, focusing on the factors that were considered most important. Using stepwise clothing evaluation of the prototype, a costume that enabled the Flamenco artist to implement optimal movements was successfully produced.

• International Journal of Stem Cells
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• v.17 no.2
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• pp.113-119
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• 2024

This report presents guidelines for the systematic management of packaging, storage, transportation, and traceability of source cells used for organoid research. Given the important role of source cells in organoid studies, it is important to ensure the preservation of their quality and integrity throughout transportation and distribution processes. The proposed guidelines, therefore, call for a cohesive strategy through these stages to minimize the risks of contamination, deterioration, and loss-threats that significantly compromise the safety, efficacy, and efficiency of source cells. Central to these guidelines is the quality control measures that include roles and responsibilities across the entire supply chain, with recommendations specific to packaging materials, transportation facilities, and storage management. Furthermore, the need for an integrated management system is emphasized, spanning from source cell collection to the final application. This system is crucial for maintaining the traceability and accountability of source cells, facilitating the sharing, distribution, and utilization on a global scale, and supporting to advance organoid research and development.

• Journal of the Korean Operations Research and Management Science Society
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• v.29 no.3
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• pp.41-61
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• 2004

The purpose of this paper is to construct $\ulcorner$CIDEAR(Cross Impact-DEA-AR)$\lrcorner$ model which evaluates proposed R&D projects considering cross impact among them and selects proper projects to utilize resources efficiently as well as to maximize efficacy of investments. For this purpose, $\ulcorner$CIDEAR$\lrcorner$ model is designed as the following six steps. $\ulcorner$Decision Theory Evaluation Model$\lrcorner$ is for setting and selecting the evaluation items according to the structured procedure of evaluation system. The priority of items is decided at $\ulcorner$AR Decision Model$\lrcorner$$\ulcorner$Cross Impact Estimation Model$\lrcorner$ is for computing the final probability of success and the result is used to revise the evaluation results of $\ulcorner$Decision Theory Evaluation Model$\lrcorner$. $\ulcorner$Resource Performance Analysis Model$\lrcorner$ classifies the proposed R&D projects on the basis of required resources and expected performance. Consequently, the possibility of bias of project selection can be prevented. $\ulcorner$Priority Oder Decision Model$\lrcorner$ is for computing the efficacy of proposed projects. Finally, $\ulcorner$Efficacy-Efficiency Cause Analysis Model$\lrcorner$ analyzes the structure of efficacy and efficiency of the projects. The major findings and significances of this study are summarized as follows: (1) $\ulcorner$CIDEAR$\lrcorner$ model can deal with the affairs of R&D projects having the characteristics of mutual independence as well as mutual dependence in the point of efficacy and efficiency. Hence, it is possible to evaluate and select R&D projects more accurately. (2) It can be possible to raise the possibility of projects success. R&D manager can use the information for project management because the efficacy-efficiency structure of selected projects can be analyzed. (3) We proved the usefulness of the constructed $\ulcorner$CIDEAR$\lrcorner$ model using an case about twenty-one R&D projects of a leading company of electronic industry in Korea.

• Proceedings of the CALSEC Conference
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• 2002.01a
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• pp.135-154
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• 2002

As the use of Information Technology is increasing, various kinds of IT service vendor proliferate. And most executives are trying to expand their field to online world. As the emphasis on Information Technology is inevitable, executives want to evaluate the service level they receive from IT service vendor. But. there's not yet the proper evaluation system for IT service. The evaluation systems like CMM, SPICE are process-focused. They don't give a look on the final product delivered to customer. On the other hand, the one that evaluate the customer satisfaction like ACSI, NCSI are too over-focused that they can't express the specific characteristics on the subjects that are deemed to evaluate. The focus is blurred. To overcome these limitations of existing framework, and to increase the value of evaluation, this study presents the evaluation system of IT service (afterwards, named as 'The new evaluation system') that derives process factors from IT service CMM, and evaluate customer satisfaction of IT service. Finally, the model was applied to the actual case to examine the practicality of the framework.