• Nuclear Engineering and Technology
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• v.55 no.5
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• pp.1616-1629
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• 2023

To quantify the conservatism of existing ASME strain-based evaluation methods for seismic loading, this paper presents very low cycle fatigue test data of elbows under various cyclic loading conditions and comparison of evaluation results with experimental failure cycles. For strain-based evaluation methods, the method presented in ASME BPVC CC N-900 and Sec. VIII are used. Predicted failure cycles are compared with experimental failure cycle to quantify the conservatism of evaluation methods. All methods give very conservative failure cycles. The CC N-900 method is the most conservative and prediction results are only ~0.5% of experimental data. For Sec. VIII method, the use of the option using code tensile properties gives ~3% of experimental data, and the use of the material-specific reduction of area can reduce conservatism but still gives ~15% of experimental data.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.18 no.2
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• pp.210-216
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• 2011

Purpose: The self-assessment ability of students is important in acquiring clinical skills. The study explored the self-assessment behavior of nursing students after OSCE (Objective Structured Clinical Examination). Methods: The participants were 90 nursing students. They assessed their performance just after an OSCE (assessment 1). They were given OSCE checklists and re-assessed their performance level (assessment 2). Assessments 1, 2, and an assessment by professor were compared and analyzed. Results: Students assessed themselves higher than professor. But, when students were divided into three groups according to score level, different behaviors were evident between the groups. The high-score group assessed themselves lower than the professor, while the mid-and low-score groups assessed themselves higher than the professor. Students' self-assessment more closely approximated the professor's assessment when they were given checklists. The correlation between assessments 1 and 2 was stronger in high-score group and weak in low-score group. Conclusion: The study results indicate that students tend to assess their skills higher than the professor, but their scores were more in line with the professor when they were provided with checklists, and students' self-assessment behavior differed in the different score groups, suggesting a need for customized feedback and a concern for students with low scores.

• 대한예방의학회:학술대회논문집
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• 1994.02a
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• pp.23-56
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• 1994

Recent criticisms of the conduct and use of risk assessment by regulatory agencies have led to a wide range of proposed remedies, including changes in regulatory statutes and the development of new methods for assessing risk. The mandate to this Committee was more limited. Our objective was to examine whether alterations in institutional arrangements or procedures, particularly the organizational separation of risk assessment from regulatory decision-making and the use of uniform guidelines for inferring risk from available scientific information, can improve federal risk assessment activities. Before undertaking to determine whether organizational and procedural reforms could improve the performance and use of risk assessment in the federal government, the Committee examined the state of risk assessment and the regulatory environment in which it is performed. In this chapter, we define risk assessment and differentiate it from other elements in the regulatory process, analyze the types of judgments made in risk assessment, and examine its current government context. Because one chronic health hazard, cancer, was highlighted in the Committee's congressional mandate and has dominated public concern about public health risks in recent years, most of our report focuses on it. Furthermore, because activities in four agencies--the Environmental Protection Agency (EPA), the Food and Drug Administration (FDA), the Occupational Safety and Health Administration (OSHA), and the Consumer Product Safety Commission (CPSC)--have given rise to many of the proposals for changes in risk assessment practices, our review focuses on these four agencies. The conclusions of this report, although directed primarily at risk assessment of potential carcinogens as performed by these four agencies, may be applicable to other federal programs to reduce health risks.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.18 no.spc
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• pp.63-74
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• 2020

The operational safety assessment is an important part of a safety case for the deep geological repository of spent fuels. It consists of different stages such as the identification of initiating events, event tree analysis, fault tree analysis, and evaluation of exposure doses to the public and radiation workers. This study develops a probabilistic safety assessment method for the operational safety assessment and establishes an assessment framework. For the event and fault tree analyses, we propose the advanced information management system for probabilistic safety assessment (AIMS-PSA Manager). In addition, we propose the Radiological Safety Analysis Computer (RSAC) program to evaluate exposure doses to the public and radiation workers. Furthermore, we check the applicability of the assessment framework with respect to drop accidents of a spent fuel assembly arising out of crane failure, at the surface facility of the KRS⁺ (KAERI Reference disposal System for SNFs). The methods and tools established through this study can be used for the development of a safety case for the KRS⁺ system as well as for the design modification and the operational safety assessment of the KRS⁺ system.

• Journal of Korean Elementary Science Education
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• v.34 no.2
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• pp.153-163
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• 2015

In this study, we analyzed elementary school teachers' self-diagnosis on their competency for assessment in science. A questionnaire was administered to 217 elementary school teachers and in-depth group interviews with 6 teachers were also conducted. The results revealed that the mean scores of five subcategories, 'choosing assessment methods', 'developing assessment instruments', 'administering, scoring, and grading', 'analyzing, interpreting, using, and communicating assessment results', and 'recognizing ethics in assessment', were 3.82, 3.50, 3.92, 3.76, and 4.09 on a scale of 5 points, respectively. Teachers having more teaching experience showed higher mean scores in all subcategories. However, only the teachers having more than 20 years of teaching experience were statistically better than those having less than 5 years of teaching experience in four subcategories except for 'recognizing ethics in assessment'. There were no significant differences in terms of major, whereas the mean scores of the teachers having master's degree were statistically higher than their counterpart in some subcategories. In addition, the teachers who had completed training for assessment exhibited statistically higher mean scores than their counterpart in four subcategories except for 'recognizing ethics in assessment'. Educational implications of these findings are discussed.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.61 no.9
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• pp.1249-1259
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• 2012

This paper proposes a Web Based Online Outage Cost Assessment and Information System(WOOCAIS) for power system outage cost assessment. The proposed WOOCAIS is a kind of web based survey method for outage cost assessment. While conventional survey methods have done outage cost assessment based on survey paper lists collected by post mail or visiting customers, the proposed WOOCAIS is a web based online survey operation and assessment system. Therefore, it can curtail expenditure for survey and also is more convenient than conventional method. It will be set up for actual outage cost assessment system of KEPCO in South Korea in the near future. The WOOCAIS will be applied in various research and actual planning and operation areas. First of all, the assessed results may be not only applied as one of objective function for generation system and grid expansion but also operational planning problems in power system.

• Journal of the Korean Institute of Landscape Architecture
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• v.32 no.4
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• pp.94-104
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• 2004

This study creates the LCP (Landscape Control Point) through the survey of spot sites for the quality of landscape assessment, which is based on an objective and departmentalized data base; the landscape assessment was achieved by production of weight value with the AHP (Analytic Hierarchy Process) technique, selection of requisites for the landscape assessment with the IVERSON method and visual area analysis with GIS (Geographic Information System). Futhermore, validity of the landscape assessment was verified by analysis of the correlation between physical amount and aesthetic amount. The purpose of this study is to suggest the basic essential data for landscape assessment and landscape planning by the characteristics of landscape based on verification of the suggested landscape assessment methods. The results of this study are summarized below. 1. In the adaptation of landscape assessment using GIS, the landscape assessment points of LCP 18, 17 and 16, which have more visible elements such as hill area, mountain area, and forest and farm land, were indicated to be higher than the others. In contrast, the landscape assessment points of LCP 13, 6 and 10, which have less visible elements, were relatively lower than the others. 2. In the visible preference measuring method, LCP 4, 14, and 16 showed high points of landscape assessment with 3.46, 3.4, and 3.18 each. With the more natural environments such as hill area, mountain area, and forest and farm land, higher results were shown. In contrast, LCP 7, 1, and 9 showed low points of landscape assessment with 2.24, 2.36, and 2.53 each. 3. In this study, a coefficient of 0.746 was gained by the analysis of correlation between the points of landscape assessment method and the points of visual preference from a slide show. This has 99 percent of probability in statistical data. 4. In conclusion, with the demonstration of the correlation between the landscape assessment method based on the AHP technique and the aesthetic amount (preference proportion), the practical use of landscape assessment can be demonstrated by the suggested landscape assessment method.

• Journal of Environmental Impact Assessment
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• v.4 no.1
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• pp.59-64
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• 1995

Environmental Impact Assesment(EIA) is composed of various procedures, such as screening, scoping, inventory survey, prediction, assessment, mitigation measure, alternative assessment, and post management. Remote sensing introduced lately begins to be applied ecosystem and land use in inventory survey and assessment of EIA. This study explains on land use classification, buffering analysis of residential area, and overlaying analysis of odor predictive data with residential area for application to EIA with remote sensing data. Residential area extracted from land use classification of remote sensing provides effectively buffering analysis of residential area in selection of landfill site with GIS. It could assess also residential effect to an offensive odor by overlaying analysis. Application methods in EIA should be enlarged to assess effectively.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.48 no.12
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• pp.1589-1598
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• 1999

Conventional MSE or PSNR based methods for objective picture quality assessment of moving picture coder are not well correlated with subjective human evaluation. In recent years, the design of better objective quality assessment has attracted much intention and several picture quality metrics based on the properties of Human Visual System has been proposed. This paper proposes new metric which is appropriate for objective picture quality assessment of block based moving picture coder by considering frequency sensitivity, inter-intra channel masking and several distortion artifacts caused by block based coding. The experimental results show that the proposed method is good correlated with subjective assessment.

• Journal of the Korean Home Economics Association
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• v.39 no.10
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• pp.1-17
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• 2001

This study is to develop cooperative learning aids for Clothing and Textiles classes, and to develop methods and tools for performance assessment. We have surveyed 127 students with‘class evaluation’questionnaire after teaching 9 classes through developed materials. As a result, we found that students preferred to cooperative learning and they tended to do their best in their assigned role in the cooperative learning. Meanwhile, we also found that they understood the assignment of performance assessment well and they felt lack of time to handle given tasks. It shows that we need to be flexible when applying a teaching method in a way that teachers give student more options to choose their duty and time span. Although a few students create a problem and delay their duty as disturbing cooperation in a group we anticipate that the developed teaching aids and performance assessment will be a great help to improve Home Economics classes. In closing, we believe that we can be open-minded Home Economics educators that continue to work on improving classes through developing diverse teaching aids and performance assessment.