• The Mathematical Education
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• v.57 no.3
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• pp.311-328
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• 2018

In school mathematics, the concept of an average is not a concept that is limited to a unit of statistics. In particular, high school students will learn about arithmetic mean and geometric mean in the process of learning absolute inequality. In calculus learning, the concept of average is involved when learning the concept of average speed. The arithmetic mean is the same as the procedure used when students mean the test scores. However, the procedure for obtaining the geometric mean differs from the procedure for the arithmetic mean. In addition, if the arithmetic mean and the geometric mean are the discrete quantity, then the mean rate of change or the average speed is different in that it considers continuous quantities. The average concept that students learn in school mathematics differs in the quantitative nature of procedures and objects. Nevertheless, it is not uncommon to find out how students construct various mathematical concepts into mathematical knowledge. This study focuses on this point and conducted the interviews of the students(three) in the second grade of high school. And the expression of students in the process of average concept formation in arithmetic mean, geometric mean, average speed. This study can be meaningful because it suggests practical examples to students about the assertion that various scholars should experience various properties possessed by the average. It is also meaningful that students are able to think about how to construct the mean conceptual properties inherent in terms such as geometric mean and mean speed in arithmetic mean concept through interview data.

• Journal of Families and Better Life
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• v.17 no.1
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• pp.139-154
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• 1999

The purpose of this study was to examine the effects of dramatic play on the hyperactive-children's self concept and their hyperactivities. The subjects for this study were 144 five-year old children of Y kindergarten in Seoul. Through the Teacher-Questionary modified by Koung-ja OH(1986) 26 children were assigned to the experimental group and the control group 13 hyperactivity-children (boy:11 girl:2) in the experimental group had dramatic play of which the main themes were positive self concept formation. but the 13 children(boy:11 girl: 2) in the control group did not any dramatic activities. Experimental procedures for the self concept test and the hyperactivity test were pre-test experimental treatment and 2 times post-test by 2 months. Self concept test used for pre-test and post-test was The data was analysed using t-test and paired t-test. The result are as follows: 1. In the pre-test for self concept the scores of the control group showed higher than that of the expe imental group. But there were significantly increased difference between pre-test and the first post0-test in the experimental group. 2. In the second post-test for self concept of the experimental group after 2 months there were no significant differences between the first post-test and the second post-test. 3. In the hyperactivity test there were no significant differences in the control group,. But the experimental group showed decreased hyperactivities in the first post-test. 4. In the second post-test for the hyperactive-children's hyperactivities in the experimental group after 2 months there were no significant differences between the first post-test and the second post-test The dramatic play influenced on the hyperactive-children's self concept positively and the decrease of hyperactive-children's hyperacivities.

• Journal of Ocean Engineering and Technology
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• v.32 no.6
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• pp.502-510
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• 2018

In order to accumulate data to lower the friction coefficient of a press mold, tribological tests were performed before and after coating SM45C with a PVC/PO film and plasma coating (CrN, concept). The ultrasonic nanocrystal surface modification (UNSM)-treated material had a nano-size surface texture, high surface hardness, and large and deep compressive residual stress formation. Even when the load was doubled, the small amount of abrasion, small weight of the abrasion, and width and depth of the abrasion did not increase as much as those of untreated materials. A comparison of the weight change before and after the tribological test with the CrN and the concept coating material and that of the untreated material showed that the wear loss of the concept coating material and P-UNSM treated material (that is, the UNSM treated material treated with the concept coating) showed a tendency to decrease by approximately 55-75%. Concept 100N had a lower friction coefficient of about 0.6, and P-UNSM-30-100N showed almost the same curve as concept 100N and had a low coefficient of friction of about 0.6. The concept multilayer coating had a thickness of $5.32{\mu}m$. In the beginning, the coefficient of friction decreased because of the plasma coating, but it started to increase from about 250-300 s. After about 350 s, the coefficient of friction tended to approach the friction coefficient of the SM45C base metal. The SGV-280F film-attached test specimen was slightly pushed back and forth, but the SM45C base material was not exposed due to abrasion. The friction coefficient was 0.22, which was the lowest, and the tribological property was the best in this study.

• Journal of the Korean Society of Costume
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• v.59 no.10
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• pp.98-110
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• 2009

This study has outlined and summarized academic meaning of formative characteristics of Organic Modernism represented by various aspects of design, art, industry and architecture, then has intented to define concept of Organic Modernism Fashion. Eventually, this study is to make a analysis of formative characteristics of Organic Modernism Fashion Design. Based on example of Organic Modernism applied to architectural structure, industrial products and pure paintings, this study has analyzed and researched into formative characteristics of Organic Modernism represented by fashion design. As a consequence of study, its characteristics are defined as below; The first, the beauty of simple formation using delicate curve. The second, the expression of symbolic formation based on surrealism. The third, the expression of continuous 3-dimensional curved surface. And the last characteristic is a providing transformable multi-function. Through those characteristics mentioned above, it may be expected to define a concept of Organic Modernism Fashion Design newly and to set a precedent for providing a basic criteria to classify formative characteristics of Organic Modernism Fashion Design.

• Korean Medical Education Review
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• v.17 no.3
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• pp.105-109
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• 2015

The purpose of this study is to examine the concept and importance of the hidden curriculum, which has an influence on the learning, culture, and identity formation of medical students, and to examine the student culture related to the hidden curriculum. The hidden curriculum can be defined from various perspectives. However, these definitions commonly include the concept of the whole experience students gain from school life in implicit ways, even though the school does not intend it. The hidden curriculum is related to non-cognitive areas and the culture formation of students in various way, including positive and negative content, and is important since once this curriculum is formed, it has a long-term impact. Therefore, it is necessary to consider not only the formal curriculum but also the hidden curriculum in order to apprehend the overall educational outcome of medical school. For this purpose, schools need to not only support studies on the hidden curriculum but also to endeavor to provide faculty and staff with educational and administrative support so that they can understand the hidden curriculum and be equipped as a role model. Furthermore, medical students need to endeavor to form a positive student culture in order to establish an appropriate identity as a doctor in the future.

• Transactions of the Korean Society of Automotive Engineers
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• v.12 no.4
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• pp.24-30
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• 2004

As the environmental pollution becomes serious global problem, the regulation of emission exhausted from automobiles is strengthened. Therefore, it is very important to know how to reduce the NOx and PM simultaneously in diesel engines, which has lot of merits such as high thermal efficiency, low fuel consumption and durability. By this reason, the new concept called as Homogeneous Charge Compression Ignition(HCCI) engines are spotlighted because this concept reduced NOx and P.M. simultaneously. However, there is trade off between output and NOx in a HCCI engine. In this study, output and emission characteristics for a gasoline direct injection type HCCI engine were investigated to clarify the effects of intake air temperature, injection time and mixture formation. From these experiments, we found that the smoke was not produced when the fuel was injected earlier than BTDC 90$^{\circ}$. In addition, the output was increased because of delay of ignition time and NOx emission was decreased because of homogeneous charge of first injection in case of split injection.

• Analytical Science and Technology
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• v.8 no.4
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• pp.807-814
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• 1995

Accurate measurements of ozone precursors are required to understand the process and extent of ozone formation in rural and urban areas. Nonmethane hydrocarbons (NMHCs) have been identified as important ozone precursors. Identification and quantification of NMHCs are difficult because of the large number present and the wide molecular weight range encountered in typical air samples. A major plan of the research team of the Climate and Air Quality Taiwan Station (CATs) was the measurement of atmospheric nonmethane hydrocarbons. An analytical method has been development for the analysis of the individual nonmethane hydrocarbons in ambient air at ppb (v) and subppb(v) levels. The whole ambient air samples were collected in canisters and analyzed by GC-FID with $Al_2O_3$/KCl PLOT column. Our targeted for quantitative analysis 43 compounds that may be substantial contributors to ozone formation. The retention indices and molar response factors of some commercially available $C_2{\sim}C_{10}$ hydrocarbons were determined and used to identify and quantify air samples. A quality assurance program was instituted to ensure that good measurements were made by participating in the International Nonmethane Hydrocarbon Intercomparison Experiments (NOMHICE).

• English & American cultural studies
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• v.14 no.2
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• pp.185-206
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• 2014

The concept of the "diaspora" has established itself as one of the major topics in literary and cultural studies in the first two decades of the twenty-first century. Contemporary studies on this topic tend to regard is diaspora as either as a liberatory space unmoored from a repressive national identity-formation or as a condition pregnant with challenges to the authority of a nation-state or nationalism. Viewed from within the social realities of multi-ethnic nations, however, diaspora has an alternative, darker face. For, reproduced within the concept itself, is that of a hierarchy: this hierarchy is one in which a dominant group seeks to repress the same ethnic members for their failure to conform. What is more, the cultural difference, which diaspora is believed to preserve, lends the dominant group an excuse to re-ethnicize its immigrants, subsuming them under the same extra-national category as that of the people or homeland they have left behind. By analyzing a range of historical and theoretical models, this study offers itself as an attempt to clarify the current, and often confusing, understandings of the condition of diaspora. By delving into its political potentials and discussing their possible socio-political ramifications, the study suggests that researchers of diaspora need to anchor themselves in historicity lest they end up "speaking for" their chosen subjects.

• International Journal of Computer Science & Network Security
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• v.22 no.10
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• pp.107-112
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• 2022

Nowadays clusters are recognized as an important instrument for promoting industrial development, innovation, competitiveness and growth. An educational cluster is a set of interrelated vocational educational institutions of various levels that are united by industry with each other and are connected by partnership with industry enterprises. This article attempts to develop and describe cluster model of university students' multilingual training. The purpose of this study is to describe multilingual training of university students and their polycultural competencies formation and to define the process of multilingual training in form of a cluster. The authors consider clusters as an integral part of the educational campus within the concept framework of Shadrinsk State Pedagogical University. To determine the essence of the concept of a cluster model of university students' multilingual training, theoretical, empirical, observational, and diagnostic methods were implemented, such as a review of scientific literature, a compilation of best practices, observation, statistical methods, etc. The authors analyzed the programs of partner universities and organized international webinars and internships for bachelors and masters abroad and developed online courses "Foreign language for undergraduate students and masters". Experimental data obtained during the implementation of cluster training show the effectiveness of the formation of students' polycultural competencies.

• Journal of Christian Education in Korea
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• v.67
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• pp.77-116
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• 2021

The purpose of this study is to argue that religious maturity is necessary for the healthy life of the aged of Korean churches in the rapidly aging society. It is also to suggest educational method for the formation and development of a positive image of God for relations with God, which is essential factor in religious maturity. To this end, this study argues that the direction and task of senior education should be religious maturity through the search for prior research on church education of senior citizens. This study also looked at the variables involved in how religious maturity affects many areas of human life. To achieve the task of religious maturity, the biblical and theological concept of maturity and religious psychological concepts of maturity are summarized, and the concept of God's image for relations with God, which is important in religious maturity, and the variables related to mature human life are examined. This study was proposed methods of church education for the formation and development of a positive image of God in order to have the right relationship with God for the religious maturity of the elderly on intellectual, emotional and behavioral levels. In the intellectual aspect, it was proposed to educate the concept of biblical and theological God and and to educate the elderly to recognize themselves as beings that need to grow and mature in order to constantly establish relationships with God. In the affective aspect, it was proposed to educate the elderly to reflect on and identify the origin and formation process of God's image and to heal their distorted God's image with an educational counseling approach. In the behavioral aspect, it was suggested to educate their roles of faith education for the next generation as parents and grandparents and to educate using educational methods that induce them to practice their relationship with God to appear in daily life.