• 한국과학교육학회지
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• 제13권1호
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• pp.31-47
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• 1993

This study was intended to find the characteristics of the middle school students' thinking processes and problem spaces when they solved the physics problems. Ten ninth grade students in Chon-Buk Do, Korea were participated in this study. The researcher investigated their thinking processes in solving 5 physics problems on electric circuit. "Thinking aloud" method was used as a research method. The students' thinking processes were recorded using an audio tape recorder and transfered into protocols. The protocols were analyzed by problem solving process coding system which was developed by Lee(1987) on the basis of Larkin's problem solving process model. The results are as follows : (1) On the average 2.85 items were solved among 5 test items, and only one person could solve all of the items correctly. (2) Problems were solved in sequence of understanding the problem, planning, carrying out the plan, and evaluating steps regardless of the problem difficulty. (3) In regard to the thinking process steps, there was no difference between the good solvers and the poor ones. But in the detail performance of problem solving, the former was different from the latter in respect with using the design of general solving procedure. (4) The basic problem spaces by the item analysis were divided into two classes. One was the problem space by using Qualitative approach in problem solving, and the other was one by using Quantitative approach. As novices in physics problem solving, most of the students used the problem space by using the Quantitative approach.

• 한국과학교육학회지
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• 제32권2호
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• pp.210-235
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• 2012

본 연구에서는 중학생들의 과학 창의적 문제 해결능력을 측정하기 위해 타당도와 신뢰도가 높은 검사도구를 개발하였다. 먼저 과학 창의적 문제 해결 능력에 대한 조작적 정의를 바탕으로 3차원 평가 틀(과학내용, 과학 탐구 기능, 사고력)을 개발하였으며, 이 평가 틀에 맞추어 평가 문항을 개발하였다. 현장 과학 교사들의 검토를 거쳐 예비 검사에 투입할 3과제로 구성된 4개 문항을 확정하였고, 예비 검사 결과를 바탕으로 각 문항의 구체적인 채점 기준과 배점을 결정하였다. 완성된 최종 검사 도구는 내용 및 평가 기준에 대한 과학 교육 전문가와 현장 교사들의 타당도 검증을 거친 후 중학교 1, 2, 3학년 320명에게 투입되었으며, 채점 결과를 바탕으로 채점자간 신뢰도를 검증받았다. 채점 결과 문항 난이도와 변별도 역시 적절한 것으로 나타났다. 앞으로 본 연구에서 개발한 평가 틀과 평가 기준을 활용하여 다양한 학교 급에 적용할 수 있는 다양한 수준의 과학 창의적 문제 해결 능력 평가도구의 개발이 지속적으로 이루어져야 할 것이다.

• 대한불안의학회지
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• 제2권2호
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• pp.115-121
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• 2006

Objectives : We performed this '2006 Korean Anxiety Research' to understand the actual state about Korean anxiety and get the basic data for mental health promotion. Methods : Semistructured questionnaire and Beck Anxiety Inventory -Korean version (BAI) were administered to total 1,000 adults (20-69 years old 501 male & 499 female adults living in Seoul and 5 metropolitan cities in Korea) on March 20th~31st, 2006. Results : Anxious subjects by the total score of BAI was 3.3%. But the responders the item 'I am in the anxious state' was 25% among total subjects. 6% (n=59) among total subjects were the responders experienced the anxiety requiring usually the counselling or treatment. The frequency of their anxiety was most commonly 1 to 2 times/month. The main causes of their anxiety were 'their health problems or illness', 'economic difficulty', 'interpersonal conflicts'. But 'help by health professional' among their usual anxiety reduction methods' was only 15% among them. Only 19% among them were under the treatment of anxiety. Only 27% among 48 subjects not under the treatment of anxiety had a desire for the anxiety treatment in the near future. Conclusion : Some people in the anxious state impairing their daily lives were not yet under the treatment. And most of them had no desire for the anxiety treatment. Therefore we will systematically plan the further health education on the anxiety-related problems for the Korean mental health promotion and the quality of life.

• 한국의류산업학회지
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• 제7권3호
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• pp.283-290
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• 2005

The purpose of this study was to investigate the shopping condition of Dongdaemoon Shoppingmall. A depth interview was administered to eight consumers aged 10s through 30s who had shopping experiences at Dongdaemoon Shoppingmall. The contents of interview were about the reasons of preference for Dongdaemoon Shoppingmall, the merchandise categories purchased, assortment, price, shopping environment, and service offered by Dongdaemoon Shoppingmall. The results of this study were as follows: The reasons of consumers' Dongdaemoon Shoppingmall preference were reasonable price, variety of merchandise assortment, easy catch of fashion trend, entertainment place, and opening hour at nighttime. The mainly purchased items were casual and fashionable clothes. Children's wear was mainly bought item by housewives too. The unique design, similar merchandises sold at department stores and new style in early adoption of fashion cycle were perceived as positive aspects, but copied merchandises and large quantity of same merchandise as negative aspects. The fixed price system was not trusted by consumers. Consumers' complaints about shopping condition were crowded pathways and shopping booths, the lacks of facilities such as fitting room, toilet, lounge area, sales persons' service, and difficulty of using credit cards. From these results, some implications for marketing strategies and practices might be suggested. In order to improve the design variety of merchandises, marketers and apparel manufacturers should make efforts by managing merchandise planning, production, selling, and promotion cooperatively. Fixed price system, acceptance of credit cards, and merchandise return/exchange service should be improved. The training the salespersons was the most important and basic step and easy way to get to successful business.

• 한국수학교육학회지시리즈A:수학교육
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• 제57권3호
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• pp.289-309
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• 2018

There has been a gradually increasing focus on adopting mathematical modeling techniques into school curricula and classrooms as a method to promote students' mathematical problem solving abilities. However, this approach is not commonly realized in today's classrooms due to the difficulty in developing appropriate mathematical modeling problems. This research focuses on developing reformulation strategies for those problems with regard to mathematical modeling. As the result of analyzing existing textbooks across three grade levels, the majority of problems related to the real-world focused on the Operating and Interpreting stage of the mathematical modeling process, while no real-world problem dealt with the Identifying variables stage. These results imply that the textbook problems cannot provide students with any chance to decide which variables are relevant and most important to know in the problem situation. Following from these results, reformulation strategies and reformulated problem examples were developed that would include the Identifying variables stage. These reformulated problem examples were then applied to a 7th grade classroom as a case study. From this case study, it is shown that: (1) the reformulated problems that included authentic events and questions would encourage students to better engage in understanding the situation and solving the problem, (2) the reformulated problems that included the Identifying variables stage would better foster the students' understanding of the situation and their ability to solve the problem, and (3) the reformulated problems that included the mathematical modeling process could be applied to lessons where new mathematical concepts are introduced, and the cooperative learning environment is required. This research can contribute to school classroom's incorporation of the mathematical modeling process with specific reformulating strategies and examples.

• 한국컴퓨터정보학회논문지
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• 제7권2호
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• pp.59-67
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• 2002

제7차 교육과정에서 과학과 교육과정의 가장 중요한 특징은 학습자의 능력을 고려한 심화·보충형 학습을 적용하고 있는 것이다. 그러나 수준별 교육께서 문제점은 개인차가 심한 학습자들에게 적합한 수업내용과 방법을 일률적으로 제시하기가 곤란하다는 것이다. 이러한 문제점을 해결하기 위하여 코스웨어를 교수·학습에 이용하고 있다. 그러나 기존의 코스웨어는 모든 학습자에게 똑같은 내용이 제시되어 학습자의 수준에 적응한 교수·학습을 기대하기 어렵다 따라서 본 연구에서는 기존의 코스웨어가 갖는 단점을 보완한 과학과 수준별 동적 교수·학습 시스템 개발을 위한 학습자 모델링을 제안한다. 본 연구에서 제안된 교수모듈은 컴포넌트 단위로 제작하여 동적 재구성이 가능하도록 하였다. 학습모듈은 ITS의 Overlay와 Bug모델을 혼합한 혼합형 모델을 적용하여 학습자 모델링을 구성하였다. 평가모듈은 문항의 난이도와 변별도에 따라 가중치를 설정하석 오류유형을 판단하였다. 이 시스템은 학습자 모델링을 통해 학습자의 수준에 따라 교수계획이 재구성되는 다양한 문제 해결 방법을 제시한다.

• 산업경영시스템학회지
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• 제40권4호
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• pp.137-146
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• 2017

For the competitive business environment under purchase dependence, this paper proposes a new approximate calculation of order fill rate which is a probability of satisfying a customer order immediately using the existing inventory. Purchase dependence is different to demand dependence. Purchase dependence treats the purchase behavior of customers, while demand dependence considers demand correlation between items, between regions, or over time. Purchase dependence can be observed in such areas as marketing, manufacturing systems, and distribution systems. Traditional computational methods have a difficulty of the curse of dimensionality for the large cases, when deriving the stationary joint distribution which is utilized to calculate the order fill rate. In order to escape the curse of dimensionality and protect the solution from diverging for the large cases, we develop a greedy iterative search algorithm based on the Gauss-Seidel method. We show that the greedy iterative search algorithm is a dependable algorithm to derive the stationary joint distribution of on-hand inventories in the retailer system by conducting a comparison analysis of a greedy iterative search algorithm with the simulation. In addition, we present some managerial insights such as : (1) The upper bound of order fill rate can be calculated by the one-item pure system, while the lower bound can be provided by the pure system that consists of all items; (2) As the degree of purchase dependence declines while other conditions remain same, it is observed that the difference between the lower and upper bounds reduces, the order fill rate increases, and the order fill rate gets closer to the upper bound.

• 한국초등과학교육학회지:초등과학교육
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• 제27권3호
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• pp.273-286
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• 2008

The purpose of this study was to develop an instrument for assessing the attitude and the knowledge level of elementary school in-service and pre-service teachers' on the modem environmental issues, and to implement it. The results of this study could be summarized as following. First, the instrument for attitude was developed as a Likert-type scale, it was constituted of 30 items through the item-chosen processes to improve the validity and reliability. The Cronbach's Alpha coefficient of the attitude instrument was .899. Second, The instrument for knowledge was developed as a multiple-choice form with 와 distracts, and the final version was constituted of 35 items. The average discrimination, difficulty, and Cronbach's Alpha coefficient of the items were .367, .629, .899, respectively. Third, in-service elementary teachers have been thinking about the modern environmental problems more seriously than pre-service teachers. However, in-service teachers 'knowledge level was lower than pre-service teachers'. Fourth, women have been thinking about the modern environmental problems more seriously than men. However, there was no difference significantly between men and women on knowledge level. Fifth, This process of developing the instrument could be provided as a model for future research which will try to develop instruments for assessing attitude or knowledge of any new areas with constructs.

• 대한영양사협회학술지
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• 제22권3호
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• pp.193-213
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• 2016

The purpose of this study is to provide a standard job description for a nutrition teacher placed in primary and secondary schools by analyzing their duties. DACUM is an acronym for 'Developing A CUrriculuM'. It was used by experts to determine the job duties, tasks and task elements to establish the job descriptions of a nutrition teachers through the development of a DACUM chart. An expert panel consisting of 10 nutrition teachers participated in a DACUM workshop and derived nutrition teacher's DACUM chart. A total of 1,550 nutrition teachers across the country were targeted as the survey subjects for validation of the DACUM chart through their perception of the frequency, importance, and difficulty of each item in the job description. A tree structure, criticality analysis, and contents validity index were added for verification. The definition of the nutrition teacher's job and DACUM chart with 5 duties, 28 tasks, and 107 task elements were derived by the DACUM method. The definition of a nutrition teacher was 'A teacher who is responsible for food service management and nutrition education and counseling for health promotion and disease prevention for students in primary and secondary schools'. The validation results of the tree structure were the priorities of the 28 tasks with ranks 1 and 2. Because there was no third priority, it was considered to be a good representation of the tasks of nutrition teachers. The DACUM chart was found to be evenly distributed with relative importances of more than 17 or less than 11 through the criticality analysis. Since the C5-4 (Conduct simulation exercise against food poisoning)'s content validity index was significantly less than the reference value of 0.78, it was not included in the final job description. 5 duties, 28 tasks, 102 task elements were included in the final job description of a nutrition teacher.

• 대한수학교육학회지:수학교육학연구
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• 제24권3호
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• pp.359-374
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• 2014

증명 학습과 관련하여 학생들이 경험하는 어려움과 오류는 수학교육계의 난제라 할 만하다. 증명에 대한 형식적 학습이 이루어지는 기하 영역에서뿐만 아니라 대수 증명에 대해서도 문자식의 처리나 일반성의 파악과 관련하여 어려움의 요소는 도처에서 발견된다. 본 연구에서는 두 3의 배수의 합은 3의 배수라는 명제에 대한 문자식을 포함한 증명에서 학생들이 증명의 문맥을 적절하게 이해하는가를 알아보는 데 초점을 둔다. 중학교 3학년 학생 24명을 대상으로 하여 증명 과정에 문자식이 포함되며 결론 부분은 빈 칸으로 생략되어 있는 증명을 제시하고 그 증명이 어떤 명제에 대한 증명인지 알아보도록 한 결과 반 이상의 학생이 문자식 자체에 근거하여 부적절한 응답을 하였다. 나아가 그 중 임의 추출한 세 명을 개별 면담함으로써 사고 특징을 조사하였다. 대수 증명을 식의 성립을 보이는 것으로 간주하는 증명관, 증명 수행과 이해에서의 문자식 해석의 괴리 등을 비롯한 사고 특징을 파악하고 그로부터 교육적 시사점을 도출하였다.