• 대한수학교육학회지:학교수학
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• 제11권3호
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• pp.479-496
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• 2009

세기(counting)와 같은 일상 경험에서 비롯되는 수와 연산에 관한 비형식적 지식은 이후의 학교 교육에 영향을 주며, 문제에 기술된 행위나 관계 유형에 따른 여러 가지 문장제를 해결할 때 문제해결 전략에도 영향을 준다. 이에 본 연구에서는 덧셈과 뺄셈의 문장제를 15가지 유형으로 구분하여 교과서에 제시된 문장제를 분석하였다. 또한 115명의 초등학교 2학년 학생을 대상으로 각각의 문장제에 대한 풀이 결과를 분석하였다. 교과서를 분석한 결과, 덧셈의 경우에 전체적으로 합병 상황의 문장제가 첨가 상황의 문장제보다 많았다. 또한 뺄셈의 경우에 구잔 상황의 문장제가 구차 상황이나 등화 상황의 문장제보다 많았다. 학생들의 문장제 풀이 결과를 분석한 결과, 덧셈 상황에서는 첨가 상황의 문제와 합병 상황의 문제에서 정답률의 차이가 거의 없는 것으로 나타났다. 그리고 뺄셈 상황에서는 구잔 상황의 문제에서 다른 두 상황의 문제보다 정답률이 높게 나타났다.

• 대한가정학회지
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• 제35권6호
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• pp.143-155
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• 1997

The purpose of this study is to compare the differences of clothing behavior by the level of self-monitoring under given social situations. The result of this study is drown from the analysis of the survey, gathered from the 522 female students of universities reside in Seoul, by using the method of convenience sampling. The statistical methods used to test the data were MANOVA and chi-square test. The results of this study can be summarized s follows; first, as a result of analyzing the differences of situational self-image pursuits among situations depending individual's self-monitoring levels, it was found that the pursuits changes among situations regardless of the self-monitoring levels. Thus, this hypothesis could not be verified. Second, as a result of analyzing the changes of priority of clothing selection factors among situations depending on individual's self-monitoring levels, it was found that the priority factors changed among situations regardless of the self-monitoring levels.

• East Asian mathematical journal
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• 제32권4호
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• pp.443-464
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• 2016

The purpose of ths study is to compare and analyze the sequence of teaching multiplication facts in the elementary school mathematics. Generally, the multiplication in the elementary school mathematics is composed of the followings; concepts of multiplication, situations involving multiplication, didactical models for multiplication, and multiplication strategies for teaching multiplication facts. This study is focusing to multiplication facts, especially to the sequence of teaching and multiplication strategies. The method of this study is a comparative and analytic method. In order to compare textbooks, we select the Korean elementary mathematics textbooks(1st curriculum~2009 revised curriculum) and the 9 foreign elementary mathematics textbooks(Japan, China, Germany, Finland, Hongkong etc.). As results of comparative investigation, the sequence of teaching multiplication facts is reconsidered on a basis of elementary students' mathematical thinking. And the connectivity of multiplication facts is strengthened in comparison with the foreign elementary mathematics textbooks. Finally multiplication strategies for teaching multiplication facts are discussed for more understanding and reasoning the principles of multiplication facts in the elementary school mathematics.

• 전기학회논문지
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• 제65권7호
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• pp.1263-1269
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• 2016

Hearing impaired persons are exposed to the danger since they can't be aware of many dangerous situations like fire alarms, car hones and so on. Therefore they need haptic or visual informations when they meet dangerous situations. In this paper, we design a dangerous sound detection engine for hearing impaired. We consider four dangerous indoor situations such as a boiled sound of kettle, a fire alarm, a door bell and a phone ringing. For outdoor, two dangerous situations such as a car horn and a siren of emergency vehicle are considered. For a test, 6 data sets are collected from those six situations. we extract LPC, LPCC and MFCC as feature vectors from the collected data and compare the vectors for feasibility. Finally we design a matching engine using an artificial neural network and perform classification tests. We perform classification tests for 3 times considering the use outdoors and indoors. The test result shows the feasibility for the dangerous sound detection.

• 한국과학교육학회지
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• 제18권3호
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• pp.327-336
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• 1998

본 연구에서는 초등학생들의 평소 학습과 시험 상황에서의 인지 전략 및 메타인지 전략 사용을 성취 수준, 동기 수준 및 성에 따라 비교하고, 이들 전략과 학업 성취도, 동기와의 관계를 분석한 후 학업 성취도에 대해 설명력이 큰 학습 전략을 조사하였다. 성취도 상위 집단 학생들은 평소 학습에서 인지 및 메타인지 전략을 하위 집단에 비하여 더 많이 사용하였으며, 시험 상황에서는 인지 전략의 사용을 하위 집단보다 더 많이 하였다. 학습 동기 수준이 높은 학생들은 평소 및 시험 상황에서 인지 전략과 메타인지 전략을 하위 수준의 학생들보다 더 많이 사용하였다. 여학생이 남학생에 비하여 평소 학습에서 전략 사용을 활발히 하는 반면 시험 상황에서는 인지 및 메타인지 전략 사용에서 성차가 없었다. 학업 성취도 및 동기와 이들 학습 전략들과의 상관은 모두 유의미하였다. 중다회귀분석 결과, 평소 학습에서 사용하는 인지 전략이 학업 성취도에 대한 가장 큰 설명력을 지니는 것으로 나타났다.

• 대한물리치료과학회지
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• 제16권1호
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• pp.31-39
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• 2009

Background: Community ambulation has been recently recognized as one of the most essential factors of activities of daily living in patients with post-stroke hemiparesis. This study aimed to compare walking velocity and step number in 5 community situations in patients with post-stroke hemiparesis. Methods: Ten chronic stroke patients volunteered for this study. The main variables analyzed were walking speed and step number, and these were measured in 5 different community situations: a physical therapy room, a parking lot, a bank, a crosswalk, and a hospital lobby. The measurements obtained for walking in the physical therapy room were measured using a 10m walk test and were used as baseline data for comparison with each option. The ambulation distance was set at 300m for the parking lot and the bank and 150m for the crosswalk and hospital lobby. For data analysis, walking speed and step number were standardized with the distance options of each ambulation. Results: Compared to the walking speed in the physical therapy room, those in the other situations, except for the parking lot, were significantly different (p<.05). Moreover, there were significant differences in the speeds between the bank and the parking lot and between the parking lot and the crosswalk (p<.05). Compared to the step number in the physical therapy room, those in all situations except for the crosswalk were significantly different (p<.05). Further, there was a significant difference in the step number between the bank and the crosswalk (p<.05). Conclusion: The walking ability of patients with hemiparesis in real environments within a community could be different from that in a physical therapy room. Therefore, the evaluation of walking should be performed in a variety of community situations.

• 대한간호학회지
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• 제34권3호
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• pp.495-503
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• 2004

Purpose: The purpose of this study was to compare the degree of cognitive level, nutritional status and depression in elderly according to living situations. Method: The subjects consisted of 173 elderly classifying three groups(living alone, living with spouse, living with children). Data was collected from March to June, 2003 by a structured questionnaire that included general characteristics, MMSE-K, nutritional status and depression scale. The collected data was analyzed by the SPSS program including descriptive statistics, $\chi$$^2$-test, ANCOVA, Scheffe test and Pearson Correlation Coefficient. Result: In MMSE-K, the living alone group showed suspicious dementia while the other groups were normal. The living alone group showed a high nutritional risk and all three groups showed depression. In MMSE-K, the nutritional status and depression were statistically significant by the living situation. In each group except living with spouse, MMSE-K indicated a significantly negative correlation to depression and nutritional status, while nutritional status showed a significantly positive correlation to depression. Conclusion: It is necessary to develop supportive programs for decreasing the risk of bad health in the elderly and an individual approach according to their living situation. Especially, more concern and intervention is necessary for the solitary elderly.

• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 1998년도 The 12th Asia Quality Management Symposium* Total Quality Management for Restoring Competitiveness
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• pp.277-286
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• 1998

This paper investigates the problem of determining optimal replacement policies for equipment subject to failures with cyclic rates. In many situations, the system failures depend on the operating environmental conditions that vary on time, usually with periodical manners. We use nonhomogeneous Poisson processes whose rate functions exhibit cyclic behavior as well as a long-term evolutionary trend to model the stochastic process of the failures when the rate of occurrence of the failures varies periodically, for example from day to day or between seasons. In this study, we compare optimal policies under the nonhomogeneous process with/without a cyclic component in the failure rate function. The analytical results for various situations are presented along with numerical examples using simulated data.

• Management Science and Financial Engineering
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• 제5권2호
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• pp.43-53
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• 1999

In many situations, the system failures depend on the operating environmental conditions that vary on time, usually with periodical manners. We use nonhomogeneous Poisson processes whose rate functions exhibit cyclic behavior as well as a long-term evolutionary trend to model the stochastic process of the failures when the rate of occurrence of the failures varies periodically, for example from day to day or between seasons. In this study, we compare optimal policies under the nonho-mogeneous process with/without a cyclic component in the failure rate function. The analytical re-sults for various situations are presented along with numerical examples using simulated data.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.66-66
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• 2000

In this parer, we introduce an algorithm to control flows of the traffic in multi-intersections. It is pointed out that the main problem in traffic control is how to resolve the congested situations for the particular time-durations and directions. The heavy load to a certain direction usually leads the intersection to congested situations, and the adjacent intersections are affected. We control and analyze the traffic flow of multi-intersections consisting of five intersections, in which four intersections are linked to the four directions of the central one. The entrance of vehicles of each direction is described using the concept of probability. We compare the performance of the pretimed signal controls to the traffic adaptive signal controller using a Petri Net simulation tool, Exspect.