• Journal of The Korean Association For Science Education
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• v.40 no.5
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• pp.485-502
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• 2020

The purpose of this study was to develop an instrument for the measuring students' state curiosity and anxiety by dividing science learning context into three stages: when confronting scientific task, checking the results, learning science concepts, and verify the validity and reliability of the measurement tools developed. For this purpose, based on the theoretical background of various prior studies, science state curiosity and science state anxiety were defined in three stages of the learning context, and preliminary items were developed according to these definitions. The preliminary items were developed with the same number and the basic framework for each stage to identify changes in state curiosity and anxiety. Some preliminary items were refined during the confirming face validity and content validity. As a result of the exploratory and confirmatory factor analysis, the measurement tool consisted of five items of state curiosity and five items of state anxiety (two factors, ten items) at each stage, and confirmed the construct validity of the measurement tool. The Cronbach alpha was 0.8 or higher for each factor or for all items. This measurement tool is meaningful in that it can measure the state curiosity and anxiety applicable in three stages of science learning context and identify the changes.

• Journal of The Korean Association For Science Education
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• v.39 no.5
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• pp.585-597
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• 2019

The purpose of this study is to analyze science subject items in the first screening stage of the elementary school teacher employment examination based on pedagogical content knowledge (PCK) and provide suggestions for improving the items. For this purpose, an analysis framework to analyze the items was developed and a total of 14 unit items between academic years of 2013 and 2019 were analyzed according to the analysis framework. The analysis of the results reveal that 'subject matter knowledge' of the five PCK components was most frequently included in the items. 'Instructional strategies and instruction for science education' was also frequently included although less than that of the previous component. However, 'assessment in science education', 'students', and 'curriculum for science education' were a little included. There were also assessment domains and contents which were not involved in the items. In the aspects of integration, the integrations between two components of two types were frequently found. No integrations were also frequently included although less than the previous category. The integrations among three or four components were also slightly found. Integrations among five components were not found. 'Subject matter knowledge' or 'instructional strategies and instruction for science education' with other components were more frequently found. However, the integrations of 'assessment in science education', 'students', and 'curriculum for science education' with the other components were less frequently found. Educational implications of these findings are discussed.

• Journal of the Korean Operations Research and Management Science Society
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• v.17 no.1
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• pp.127-134
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• 1992

In this paper, we first examine the stochastic behavior associated with storage/retrieval process under COL policy, and give analytical results such as the limiting distributions of the number of items in the system and the expected travel distance. We also investigate the phenomenon of natural zoning, that is, the tendency of similar items to group themselves together, when two types of items with different turnover rates are stored and retrieved. Natural zoning refers to this grouping occurring under the seemingly unbiased policy COL. We show that zoning can occur naturally with batch arrivals to the storage system.

• Management Science and Financial Engineering
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• v.19 no.1
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• pp.25-28
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• 2013

Consider the inverse bin-packing number problem. Given a set of items and a prescribed number K of bins, the inverse bin-packing number problem, IBPN for short, is concerned with determining the minimum perturbation to the item-size vector so that all the items can be packed into K bins or less. It is known that this problem is NP-hard (Chung, 2012). In this paper, we investigate some special cases of IBPN that can be solved in polynomial time. We propose an optimal algorithm for solving the IBPN instances with two distinct item sizes and the instances with large items.

• Journal of Nutrition and Health
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• v.57 no.2
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• pp.244-260
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• 2024

Purpose: With the 2021 revision of dietary guidelines in Korean emphasizing environmentally sustainable dietary practices, this study attempted to develop an evaluation tool to comprehensively evaluate the degree of practice and compliance with food and nutrient intake, dietary habits, and dietary culture guidelines based on the revised dietary guidelines. Methods: The candidate evaluation items were collected by reviewing 934 literature reviews on domestic and foreign dietary evaluations. Fifty-nine candidate items were derived by selecting the items corresponding to dietary guidelines. The content validity ratio (CVR) cutoff point evaluation was conducted with 11 experts to delete 11 items that did not meet the CVR standard. Fifty-five pilot survey candidate items were selected through revision and additional process according to expert opinion. Seventy final candidate items were selected by adding 15 questions for validity verification and reference. A pilot survey was conducted online and offline on 332 adults aged 19-64 in Seoul and the metropolitan area, and exploratory factor analysis was used to verify the construct validity of the evaluation items. Through exploratory factor analysis, the Kaiser-Meyer-Olkin, Bartlett's sphericity test, variance explained, and Cronbach's alpha criteria were confirmed in each process. Results: Exploratory factor analyses derived three criteria: food and nutrient intakes (11 items), eating behaviors (9 items), and dietary culture (14 items), consisting of 34 evaluation items. Conclusion: The present scale was validated and can be used for comprehensive evaluations of the dietary guidelines for Korean adults in a simple way.

• Journal of Korean Academy of Nursing
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• v.35 no.1
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• pp.113-124
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• 2005

Purpose: The purpose of this study was to develop a health conservation scale with high validity and reliability for institutionalized elderly. Method: The process of development of this scale was as follows. A conceptual framework composed of 4 phases of health conservation of institutionalized elderly was identified based on the literature review with elderlies and discussions with experts in health conservation. A total of 75 items, on a 4-point scale were developed. Through reliability testing and factor analysis, 57 preliminary items were selected. By means of internal consistency of the 57 items, 18 items whose inner-items correlation coefficient was below .40 were deleted. Through factor analysis, 2 items whose factor loading was below .40 were deleted. Finally 37 items remained. To verity the 37 items, factor analysis, reliability testing, and correlation was done. Data were collected from 207 institutionalized elderly subjects in Daegu, Kyungpook, Busan, and KyungNam Province from August. 2003 to February. 2004. Result: In the result of factor analysis of the 37 items, 4 factors were extracted. These factors were labeled as ‘personal integrity’, ‘conservation of energy', ‘structural integrity’, and ‘social integrity'. These factors included 4 phases of health conservation. Cronbach's Alpha of 37 the items was .9424 and the correlation coefficient of HPLP was .723. Conclusion: The researchers recommend the following: An explorative study on the variables related to health conservation is needed for criterion validity of this scale. Studies on health conservation of different age groups, and subjects are needed for verification.

• Journal of Korean Academy of Nursing
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• v.41 no.3
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• pp.313-324
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• 2011

Purpose: The study was done to develop a dignified dying scale for Korean adults. Methods: The process included construction of a conceptual framework, generation of initial items, verification of content validity, selection of secondary items, preliminary study, and extraction of final items. The participants were 428 adults who lived in one of 3 Korean metropolitan cities: Seoul, Daegu, and Busan. Item analysis, factor analysis, criterion related validity, and internal consistency were used to analyze the data. Data collection was done from March to June 2010. Results: Thirty items were selected for the final scale, and categorized into 5 factors explaining 54.5% of the total variance. The factors were labeled as maintaining emotional comfort (10 items), arranging social relationship (9 items), avoiding suffering (3 items), maintaining autonomous decision making (4 items), and role preservation (4 items). The scores for the scale were significantly correlated with personal meanings of death scale. Cronbach's alpha coefficient for the 30 items was .92. Conclusion: The above findings indicate that the dignified dying scale has a good validity and reliability when used with Korean adults.

• Journal of Korean Academy of Nursing
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• v.38 no.6
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• pp.813-821
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• 2008

Purpose: This study was conducted to develop an instrument measuring awareness of osteoporosis. Methods: The process included construction of a conceptual framework, generation of 86 preliminary items, verification of content validity, selection of secondary items, verification of construct validity and extraction of final items. The 86 items were reviewed for content validity by two groups of experts and were tested to evaluate inter item correlation coefficient by two groups of adult women. From June to August 2007, data were collected from 383 adult women who lived in Seoul and provinces in Korea. Data were analyzed by performing item analysis, Varimax factor analysis and Cronbach's alpha. Results: There were 31 items in the final instrument categorized into 5 factors. The factors were labeled as "preventive behaviors (10 items)", "risk factors (5 items)", "characteristics of osteoporosis (6 items)", "improving bone health (5 items)", and "bone physiology (5 items)". Cumulative percent of variance was 60.92% and eigen values ranged from 1.20 to 12.44. Cronbach's alpha was .948 and ranged from .804 to .917. Conclusion: Validity and reliability of the scale are confirmed in this study showing its utility for measuring awareness of osteoporosis for women. Utilization of the scale will also contribute to designing an appropriate prevention program for osteoporosis.

• Journal of Environmental Science International
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• v.31 no.7
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• pp.653-663
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• 2022

Research activities and discussions on specialized areas reflecting the specificity of landscape construction are necessary. Therefore, this study was conducted with the purpose of presenting basic data for efficient field management by deriving items necessary for safety management in landscape construction fields through experts' opinions. A survey was conducted using Delphi analysis to derive "management items" and "safety management items according to landscape type" for landscape construction field safety for a total of 15 landscape construction specialists. The survey results showed that four top items were derived from the "management items" for the safety of landscape construction fields; they include: "safety and health management organization and education," "industrial safety and health management expenses," "payment of personal protection," and "establishment of safety measures." In addition, two to five items for each higher item appeared and resulted in a total of 13 lower items. Personnel, organization, budget, etc. for safety management are always required in the field, and the monitoring part of whether these elements are working was also taken up as a management item. In the "Management items according to each landscape construction" a total of eight landscape type were distinguished, they include: 'Reinforced concrete work', 'Masonry work', 'Plaster's work', 'Waterproof work', 'Stone masonry work', 'Pavement work', 'Facilities work', and 'Planting work'. Furthermore, two to seven sub-items for each construction type were derived, and a total of 35 management items were presented.

• Journal of The Korean Association For Science Education
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• v.12 no.3
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• pp.91-107
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• 1992

The Purpose of this study was to present the procedures and methods of ordering theory,and to search for a learning hierarchy among science process skills in each Piagetian cognitive reasoning level. One of the purpose of this is not to determine the clear and exact hierarchy but rather to demonstrate how ordering theoretic methods and procedures can be used to determine the hierarchy of logical relationships among a set of test items or the testing of a hypothesized hierarchy. Ordering theory was used to analyze five science process skills collected from 509 high school students. Ordering Theory has as its primary intent either the testing of hypothesized hierarchies among items at the determination of hierchies among items. Hierarchical relationships were identified within five science process skills. The results will be helpful in giving useful inform at ions to classroom teachers and science curriculum developer.