• 한국수학교육학회지시리즈C:초등수학교육
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• 제11권2호
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• pp.141-159
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• 2008

수학 교육에서 도형은 기하학의 기초 개념을 소개하는 중요한 개념이 된다. 교과서가 학습자의 수준에 맞게 수학적 지식을 변환시켜 놓은 지식의 전달 매체라고 할 때 도형의 내용 중에 실생활에서 가장 많이 접할 수 있는 사각형의 지도 내용은 어떤 변화가 있었는지 살펴보고 교수학적 원리를 밝히는 것이 본 연구의 목적이다. 1차 교육과정 교과서와 2차 교육과정 교과서는 교수학적으로 덜 구조화되어 단순한 모양 소개에만 초점이 맞추어져 있으며, 3차 교육과정 교과서는 새 수학의 영향으로 학문적 체계를 갖추어 포함관계에 초점을 맞추었다. 4차에서 6차 교육과정 교과서에서는 학문적 체계에 따라 지도 내용을 제시하였고, 도형의 성질 지도에 초점을 맞추었다. 7차 교육과정 교과서는 실생활과의 연계성을 강조하였고, 학생들이 지식을 구성하는 기회의 제공을 많이 다루고 있다. 학생들의 유의미한 학습을 위해 이러한 변화에 대한 시사점을 교실 현장과 교과서의 제작에 충분히 반영되어야 한다.

• 한국안전학회지
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• 제16권1호
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• pp.53-58
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• 2001

Constructions on the soft clay layer of low strength and high compression bring out many problems. Recent studies show that strength of the soft clay layer could be substantially improved by mixing quicklime. For the purpose, a series of uniaxial compression tests were performed, using quicklime, in order to analyze strength characteristics. The major test results are summarized following : When water content is 90%, the strength is observed to precipitously increase between 3～14 days, then, the extent slowly increase in relative terms. When water content is 130%, the strength is observed to precipitously increase up to 28 days. When the strength of water content 90% is compared to that of water content 130%, the initial strength of the former is higher than that of the latter. The analyses show that the improvement of soft clay layers can be realized by the mixture of both quicklime and sand, and by the mixture of quicklime only.

• 한국시스템다이내믹스연구
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• 제5권1호
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• pp.73-97
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• 2004

This paper explores the relationship between technological characteristics within process innovation and selection of the firms of different organizational forms in the evolution of an industry. For this purpose, this paper develops a simulation model for industrial change that replicates dynamic competition for process innovation. The simulation analysis found the following causal relationship. First, the stronger innovation impact in terms of productivity jump tends to enlarge the productivity difference among the incumbent firms and increase the speed of productivity catch-up by the large diversified firms, Second, the possibility of entry, and eventual dominance by the large diversified firms increase when the innovation-productivity linkage is stronger and there is less cumulativeness in productivity determination. These results imply that technological characteristics are important factors that have influence on whether or not the large diversified firms can enter and succeed in an industry.

• 환경생물
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• 제25권1호
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• pp.72-79
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• 2007

Mormonilla phasma is redescribed, based on the specimens from the Northeastern Pacific. M. phasma in the study area has the following morphological characteristics; second endopodal segment of mandible partly fused to basis and a distinct three-segmented exopod of mandible in anterior view and one indistinct segment in posterior view which are different from the description given by Boxshall (1979). In addition the first and the second endopodal segments of leg 1 were also separated indistinctly. Other morphological characteristics are similar to those reported in previous studies. The morphological anomalies in endopodal segments of the leg 1, unknown up to now are also discussed. This study is the first report on the distribution of M. phasma in the Northeastern Pacific.

• 대한가정학회지
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• 제40권5호
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• pp.147-158
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• 2002

This study was intended to make an analysis of the classification of Internet consumer information provided on the Internet and its realities with a focus on the realities of information characteristics and technological level to provide systematized consumer information for consumers. As a result, the following findings were obtained: First, it was found that information on consumer panel research, anti-site and consumerism is lacking in terms of the type of information currently provided in the Internet consumer information classification. Second, it was found that up-to-datensess, communically and connectivity were high in the level of Internet consumer information characteristics. Third, it was found that publicity was realities well carried out in terms of the technological level of Internet consumer information but that the realities of publicity was still tacking. Fourth, it is thought that it is necessary to construct the Internet consumer information provision site through several eve-level programs for elementary, middle and high school students in a systematic fashion in order to provide diverse consumers with Internet consumer information at several levels.

• 통상정보연구
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• 제10권4호
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• pp.321-350
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• 2008

The China has opened the distribution market completely since it joined the World Trade Organization on Dec 11 2001. The notable features of Chinese distribution market are the transition from the consumers' monolithic demand to diversification for the luxury goods, well-being products. The regional characteristics of consumers are smart, conservative, optimistic and advanced. and the open door policy has prompted the capitalistic economy gradually. We analyzed the Chinese distribution markets and came up with the following strategies. First, we recommend the setting of the key regional market not covering the whole chinese markets. then we can extend the main market step by step. Second, we need to cooperate and advance with the Korean distribution companies which entered into markets already. Third, we need to acquire the competitive and stable distribution channel in China. Fourth, we need to implement the localization strategy in terms of human resources and procurement. Fifth, the consignment management can be another strategy. I hope this research can be a little help to those who wish to expand to the Chinese markets.

• 조명전기설비학회논문지
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• 제29권5호
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• pp.80-85
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• 2015

Recently, not only in the Middle East and Southeast Asia but in African area, too, industrial plant construction is being actually done. But unlike in Korea, a lot of them are small-scale isolated industrial plants. And because of the characteristics of industrial plants, induction motors' load forms a large part. The influence of stability resulted from the maneuver and operation of induction motors' load may lead to serious result in the isolated system. This study analyzed it through mathematical modeling on induction motors' maneuver phenomena in the isolated system, realized a case system with the E-TAP program, and simulated load follow performances according to the control variables of a generator inside the isolated system.

• 실천공학교육논문지
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• 제11권2호
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• pp.219-229
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• 2019

The purpose of this study was to examine the effect of on-site training environments and goals on learning outcomes of trainees. For this purpose, the study analyzed survey data collected from 752 students who participated in KOREATECH's Industry Professional Practice (IPP) on-site training program from 2017 to 2018. The following summarizes some important findings from the study results: First, on examining whether the effect of job characteristics on the academic competencies differs according to the characteristics of the group, it was found that the factors that affect the whole group were job content, coaching, and welfare benefits, but the effect of job scope was statistically significant. Second, on examining whether the effect of job characteristics on job competencies differs according to the characteristics of the group, it was found that the factors that affect the whole group were job content, coaching, and job scope, but the effect of welfare was statistically significant. Analyzing by training goals, it was found that the major influencers were job content in the Recruitment-intended group; and job content, coaching and job scope in the Training-intended group. Based on the results, the implications of the study and follow-up studies are suggested.

• 대한가정학회지
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• 제50권1호
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• pp.65-78
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• 2012

This research investigated the difficulties in parenting influenced by the mother's characteristics and child's temperament. This study used first-year data from the Panel Study of Korean Children(PSKC), which was carried out under the R&D Center's child care policy. The following methods were used for analysis; descriptive statistics, correlation analysis and multiple regression using SPSS 13.0 program. First, the result is that the difficulties in parenting in terms of mother's sociology of population is more difficult when mother is early 30, low educational attainment and has no income and religion. Second, the result shows that relation between mother's characteristics or child's temperament and difficulties for parenting is affected by both depression, conflict of mother's characteristics and emotions of child's temperament. Third, the most important thing that affects to difficulties in parenting is in order of mother's depression, self-esteem, the method of bringing up, emotions of child's temperament and parent's trouble.

• 복식문화연구
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• 제7권1호
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• pp.1-12
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• 1999

Analysis of Customer Characteristics on Environment-Friendly Clothing Products The purpose of this study is to analyze the characteristics of the environment-friendly customers in Korean fashion market. The study is analyzed through questionary paper to the domestic female group of more than or equal to age of twenty living in Seoul. The collected questionary paper is analyzed with SPSS/PC/sub +/ program and the method of statistical analysis used for this study is frequency analysis, factor analysis, cluster analysis, t-test, and crosstab analysis. The result of analysis of the characteristics of the environment -friendly customers involves the following: Firstly, there were no significant difference in the demographic characteristics between the environment-friendly customer group and non-environment-friendly customers group. Secondly, environment-friendly customers had more environmental programs, had seen and heard more environmental program through current news from TV, newspapers, and magazines, and had more interest in recycling or separated collecting of garbage, and been doing better recycling or separated collecting. These serial processes of research, have the meaning in confirming that segmented market for environment-friendly customers exists in the domestic fashion market, and these will not only set up the basis of research on the market of environment-friendly fashion product but also be able to contribute to propose future direction of research.