• East Asian mathematical journal
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• v.16 no.1
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• pp.49-55
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• 2000

In this paper we find some classes of operators implying normaity. The main result is as follows. If T is restriction-convexoid and is reduced by each of its eigenspaces corresponding to isolated eigenvalues, which is a class including hyponormal operators, and if $\sigma$(T) is countable then T is diagonal and normal.

• Journal of the Korean Society for Library and Information Science
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• v.40 no.3
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• pp.151-173
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• 2006

The purpose of this study is to make out a draft for the standard classification of the National Knowledge and Information Resources. As the result of the Study the standard classification system of the national knowledge and information resources, named "Knowledge Classification 'KC' is suggested. KC consists of 3 classification systems classification by subject, type of resources and type of media. The classification by subject has 12 main classes, and each main class has divisions. Main classes consist each of major discipline or group of related disciplines. The type of resources is classified by 10 types of content, likewise numbered 0-9, and the media of knowledge are classified by 8 types. likewise 0-7. In the Practice the notation always consists of 2 characters and 2 digits. The first character designate main class and the second character designate division. The first number designate the type of resources and the second number designate the type of media.

• The Research Journal of the Costume Culture
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• v.13 no.3 s.56
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• pp.361-379
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• 2005

The purpose of this study was to find how hybrid fashion and make-up responses to multiculturalism condition and how expression of hybrid. Today, every culture has taken on the compromise form by means of the cultural difference, variety, and pluralism according to the internationalization and the advance. In accordance with this current of the times, this study observed the hybrid found in the multiculturalism of the 21th century. The expression of hybrid in multiculturalism of contemporary fashion and make up combination of difference. Second, the society development and a generalized knowledge of multiculturalism and hybrid and history of make up. Third, characteristic of fashion about multiculturalism and characteristic of fashion about hybrid classify a divide into five according to fashion trend. Oriental and western of hybrid, the past and the present of hybrid, high society and the lower classes of hybrid, the main current and non mainstreamers of hybrid, the present and the future of hybrid. Fourth, characteristic of make up about multiculturalism and characteristic of make up about hybrid classify a divide into five according to fashion trend. Oriental and western of hybrid, the past and the present of hybrid, high society and the lower classes of hybrid, the main current and non mainstreamers of hybrid, the present and the future of hybrid take measures too.

• Journal of Korean Home Economics Education Association
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• v.4 no.1
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• pp.43-55
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• 1992

The purpose of this reasearch is to supply the basic data to improve Home Economics curriculum. This research was intended for 190 home economics teachers who are teaching in Kwang-Ju and chun-nam. The results are summarized as follows； 1. Among the objects of Home economics, the most important objects were to make students understand the significance of family life and development of family numbers. It requires 4 or 5 hours a week to learn these objects. 2. The amount of curriculum was immense and the level of curriculum was higher than students’level. More intencifying field are in this order； sex education, propriety education, consumption life, occupation, and computer education. 3. In home economics curriculum, the main stress was laid upon the application of action and learning content was focused on the matter set in the examination. 4. Theory and practical training classes were usually in the ratio of 7：3 and 8：2 in the current school classes. Ideal training classes are in the ration of 4：6, 5：5, 6：4, which showed that much weight was given to the practical exercises. 5. In practing subject matter, students tended to practice only main subject matter. The reason was primarily due to the lacks of equipments and faccilities, the limitation of training time for enterance examination and budgetary deficit. 6. Application of resorces was in the order of files, realia, samples, hanging chart, O.H.P and V.T.R. 7. The method of evaluation was mostly composed of paper and pens and practical evaluation when the practical evaluation was carrient out, in the case of necessity the standard of evaluation was made out.

• Journal of the Korean Society for Geothermal and Hydrothermal Energy
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• v.14 no.1
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• pp.8-15
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• 2018

The purpose of this study was to analyze the energy consumption according to the HVAC systems in 122 elementary schools. To do this, we classified schools according to the HVAC systems. Selected schools were classified to the following groups by the HVAC equipments: EHP, EHP and GHP together and GHP. In addition we divided schools by the number of classes. The main results are as follow: 1) Annual average energy consumption at schools was about 300~900(kWh/students), $30{\sim}50(kWh/m^2)$, 9,000~29,000((kWh/class) 2) The smaller schools, the higher the energy consumption per class; energy usage of 10~19 classes's schools were approximately 3 times higher than 40 classes's schools. 3) Schools where the EHP was installed had the lowest energy costs and energy usage. The difference in energy costs was lower than the difference in energy usage because of the fuel price and the ratio of energy sources.

• Journal of the Korean Society for Library and Information Science
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• v.50 no.3
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• pp.249-265
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• 2016

The objective of this study is to analyze the characteristics of Cutter's Expansive Classification. The four elements about classification evaluation were applied to analyze it. Results show that first, from philosophy and religion class to literature class, the order of main classes is logical and evolutionary. Second, the notation is a pure notation including author mark. Third, the classification is expansive from first classification to seventh classification. Science classes were expanded in the second classification comparing to the first classification. From the third classification, all classes were expanded. Fourth, it was applied by the local list to indicate places emphasizing connection of geographical space.

• Journal of electromagnetic engineering and science
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• v.1 no.2
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• pp.146-155
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• 2001

This paper describes the improvement in performance of power amplifiers by Defected Ground Structure (DGS) for several operating classes. Due to its excellent capability of harmonic rejection, DGS plays a threat role in improving the main performance of power amplifiers such as output power, power added efficiency, harmonic rejection, and intermodulation distortion (IMD3). In order to verify the improvement in performance of power amplifiers by DGS, measured data for a 30 Watts power amplifier with and without DGS attached under several operating classes are illustrated and compared. The principle of the performance improvement is described with simple Volterra nonlinear transfer functions. Also, the measured performance far two cases, i.e. with and without DGS, and the quantities of improvement fur the various operating classes are compared and discussed.

• Korean Journal of Child Studies
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• v.36 no.5
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• pp.115-134
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• 2015

The main purpose of this study is to explore the relationship between latent classes of childhood maltreatment and depression anxiety and aggression from childhood to adolescence. 1,785 participants in a sample form Seoul Panel Study of Children were used in this study. Using latent class analysis, three classes of child maltreatment were identified: 'low maltreatment'(89.2%), 'physical+emotional abuse+neglect'(1.9%), 'physical+emotional abuse'(8.9%). Three developmental trajectories of depression anxiety were classified: 'low depression anxiety'(72.3%), 'moderate depression anxiety'(23.3%), 'high depression anxiety'(4.4%). Two developmental trajectories of aggression were revealed: 'low aggression'(89.3%), 'high aggression'(10.7%). As estimated by latent transition probability, the multiple maltreatment classes were more likely to have higher levels of depression anxiety or aggression than the no maltreatment class. There appeared to be distinct profiles of maltreatment among adolescents that had differential associations to measures of internal and external problems. The implications for both practice and policy implications are also discussed.

• Journal of the International Relations & Interdisciplinary Education
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• v.1 no.1
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• pp.46-60
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• 2021

The main purpose of this study was to examine the satisfaction of online classes of undergraduates who have experienced sudden online classes in college because of COVID-19, and to analyze the differences of the satisfaction of online classes depending on colleges. The participants were 1,380 college students. Descriptive statistics, one-way ANOVA, and Post-hoc Scheffé were performed. Undergraduates were highly satisfied with online classes in cultural subjects and major subjects, whereas they showed low satisfaction with appropriateness of the assignment. There were statistically significant differences in online class satisfaction between colleges. Students at the College of Education were highly satisfied with online classes satisfaction, while engineering students were less satisfied with online classes satisfaction. There were statistically significant differences in students engagements between colleges. Regardless of colleges, students displayed low satisfaction in e-class server and teaching and learning infrastructure. These findings suggest that we need to provide autonomous support and make an effective online learning environment such as server expansion and e-class improvement to enhance undergraduates' self-directed learning. We also should come up with effective online classes guidelines.

• 한국체육학회지인문사회과학편
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• v.55 no.5
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• pp.593-604
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• 2016

The purpose of this study was to examine the effect of teaching behaviors perceived by college students' participating in liberal dance classes on learning motivation and continuous participation intention. The main target audience of this research is college students who participate in liberal dance classes in five universities in Seoul and Gyeonggi. By using purposive sampling among non probability sampling, totally 330 papers had been distributed, and 314 questionnaires had been used for practical analysis. The data process was performed by frequency analysis, exploratory factor analysis, confirmatory factor analysis, reliability analysis, structural equation modeling. The results were as follows: First, teaching behaviors perceived by college students' participating in liberal dance classes had a significant effect on learning motivation. Secondly, teaching behaviors perceived by college students' participating in liberal dance classes had a significant effect on continuous participation intention. Lastly, learning motivation perceived by college students' participating in liberal dance classes had a significant effect on continuous participation Intention. Lastly, there was the mediating effect of learning motivation was inspected in the relationship between teaching behaviors perceived by college students' participating in liberal dance classes and continuous participation intention.