• Education of Primary School Mathematics
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• v.6 no.2
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• pp.85-91
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• 2002

The purpose of this study is to analyze elementary students' understanding the relationship between perimeter and area in geometric figures. In this study, the questionaries were used. In the survey, the subjects were elementary school students in In-cheon city. They were 86 students of the fifth grade, 86 of the sixth. They were asked to solve the problems which was designed by the researcher and to describe the reasons why they answered like that. Study findings are as following; Students have misbelief about the concept of the relationship between perimeter and area in geometric figures. Therefore, 1 propose the method fur teaching about the relationship between perimeter and area in geometric figures. That is teaching via problem solving.. In teaching via problem solving, problems are valued not only as a purpose fur learning mathematics but also a primary means of doing so. For example, teachers give the problem relating the concepts of area and perimeter using a set of twenty-four square tiles. Students are challenged to determine the number of small tiles needed to make rectangle tables. Using this, students can recognize the concept of the relationship between perimeter and area in geometric figures.

• Journal of Korean Public Health Nursing
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• v.4 no.2
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• pp.35-57
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• 1990

This study was conducted to provide information useful in developing a nursing curriculum. The sample consisted of 158 nursing students in Hanyang University and 34 faculty members who has taught them in their college & the practical area. Data were collected by using a structured questionnaire, which consisted of general characteristics of the students & their self-concept, teacher's perception of student's professional roles. The results are summarized as follows; 1. General characteristics of the students When the students applied for the university, they decided what they would specialized in. Because the motive of application for their major was simply based on their high school records, they were admitted to their university without previous knowledge of their major. The reason why they wanted to tranfer to another course after the admission was the same as above. The level of satisfaction of their major was the highest in Freshman, but in other grades the higher the;, grades were, the more they satisfied with their major and they had a better prospects about their speciality. 2. Self-concept in profermance for their major Self-concept in horne aspects was more positive perception than in social aspects & self control aspects. It resulted from tile fact that all students were females and the nursing uniqueness was based on the spirit of humanity & service. The students who had graduated from the high school in rural area wanted to tranfer to another course and taken counsel their personal problems with their parents had higher self-concept in horne aspects. As their grades were higher, the self-concept in social aspects bacame higher. The students who were satisfied with their major and took counsel their personal problems with their parents had more positive self - concept in social aspects. Self-concept in self control aspects was lower than other aspects. The students who didn't take counsel their problems with their parents, were burdened with their educational expenses and their curriculum had more negative self-concept in self control aspects. Therefore the university should be concerned about student's welfare and provide detailed orientation about their curriculum. 3. Teacher's perception about learner's professional role The role model of democratic group leader, role models for learners facilitator in a students' reach for knowledge and teaching based on soundly researched theory showed more positive perception than other factors. Their mean values were over 4. 32. The professionalism of allnurshing area, reinforcement with reinforcement for learning, nursing as part of the meaningful context of the whole showed nagative perception. Their mean values were below 3. 00. Therefore the nurse as a teacher should try to promote the locus of nursing profession and participate in their research actively.

• Journal of the Korean housing association
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• v.19 no.4
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• pp.107-119
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• 2008

The purpose of this study was to provide basic information about the study of model development of sustainable housing area. So, this study identified the concept of sustainable development and condition after investigation Habitat Agenda II, and the 10 items of agenda were used to constitute the case study framework. This study found the development characteristics through the case study of 6 sustainable housing areas in the world(US, UK and Australia), and searched the missing point in the sustainable development concept. The major findings are summarized as follows: First, the attempt of environmental sustainability was restrictive such as minimal environment pollution and waste, water resource protection and conservation of nature ecosystem. Second, in social-culture sustainability, the effort of right to housing, solution of urban squatter and housing welfare eliminated. Third, in economic sustainability, the attempt of prevent natural disaster, technological and industrial disaster excluded.

• Journal of the Korean Institute of Telematics and Electronics B
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• v.31B no.7
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• pp.42-48
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• 1994

In this paper, a low power and high speed flash Analog-to-Digital Converter using current-mode concept is proposed. Current-mode approach offers a number of advantages over conventional voltage-mode approach, such as lower power consumption small chip area improved accuracy etc. Rescently this concept was applied to algorithmic A/D Converter. But, its conversion speed is limited to medium speed. Consequently this converter is not applicable to the high speed signal processing system. This ADC is fabricated in 1.2um double metal CMOS standard process. This ADC's conversion time is measured to be 7MHz, and power consumption is 2.0mW, and differential nonlinearity is less than 1.14LSB and total harmonic distortion is -50dB. The active area of analog chip is about 350 x 550u$m^2$. The proposed ADC seems suitable for a single chip design of digital signal processing system required high conversion speed, high resolution small chip area and low power consumption.

• International Journal of Naval Architecture and Ocean Engineering
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• v.10 no.5
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• pp.529-544
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• 2018

Ship owners now demand a new design approach for the rudder that considers detailed design information such as maneuverability and environmental loads etc. on a quantified basis. In this paper, we developed the concept of a safe operation capability chart for the design of a rudder area. The chart can be used as the basis of design considering the maneuverability and environmental loads. To confirm the applicability of the safe operation capability chart for use as the basis of design, four different rudders are assumed in this work. First, it is determined whether or not it is appropriate to design a rudder by applying a conventional design approach based on IMO maneuvering tests. The proposed concept is reviewed for use as the basis of the design by investigating the effect of rudder area on capability charts that are plotted according to the rudder under various environmental conditions.

• Journal of Korean society of Dental Hygiene
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• v.18 no.1
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• pp.55-63
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• 2018

Objectives: The objective of this study is to investigate the relationship among professional self-concept, self-esteem and job satisfaction in the clinical dental hygienists and provide the basic data for the effective management of clinical dental hygienists. Methods: A self-reported questionnaire was filled out by 250 clinical dental hygienists in Seoul, Gyeonggi, Chungcheong, Jeolla, and Gyeongsang Provinces from February 1 to March 30, 2017. Data were analyzed using IMB SPSS/WIN 22.0 program. Professional self-concept, self-esteem and job satisfaction according to the general characteristics and job characteristics were analzyed by independent t-test, one way ANOVA and Tukey. The relationship among professional self-concept, self-esteem and job satisfaction was found by Pearson's correlation. Multiple regression analysis was used to find out the relationship among professional self-concept, self-esteem and job satisfaction in the clinical dental hygienist. The significance level was a=0.05. Results: Clinical dental hygienist's professional self-concept was 3.76 points, self-esteem was 3.08 points and job satisfaction was 3.35 points. In general characteristics, professional self-concept showed the significant differences by age (p=0.043), marital status (p=0.005), level of education (p=0.001), duration of clinical career (p=0.003) and economic level (p=0.001). Job satisfaction showed the significant differences by age (p=0.019) and level of education (p=0.024). In job related characteristic, professional self-concept showed the significant differences by working area (p=0.001), working intensity (p=0.011) and position (p=0.001), while job satisfaction showed the significant differences by working area (p=0.014) and working intensity (p=0.001). Influencing factors in the job satisfaction in the clinical dental hygienists were age, working intensity, self-esteem, and professional self-concept. The explanatory of the model was 29.0%. Conclusions: Professional self-concept, self-esteem and job satisfaction in the clinical dental hygienists are related. To improve job satisfaction of the clinical dental hygienists, program development and institutional support to improve self-esteem and professional self-concept are needed.

• The Korean Journal of Community Living Science
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• v.17 no.4
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• pp.137-149
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• 2006

The purpose of this study was to examine the relation of middle school students' stress in relation to certain variables, those of grade, gender, academic achievement, coping behavior and self-concept. The subjects were 574 students selected from 4 middle schools in the Incheon area. The instruments included a stress index, coping behavior questionnaire and self-concept inventory. The statistics used from this data were t-test, one-way ANOVA (Scheff test), correlation analysis and multiple regression analysis. This study showed that middle school students' stress was influenced significantly by the grade, gender and achievement in school. Also, coping behavior and self-concept were influenced significantly by the grade, gender, and achievement in school. Correlation analysis indicated that student's stress and certain coping behavior were postively correlated, especially avoidance coping behavior indicated a higher correlation to students' stress than active coping behavior. The relationship between stress and self-concept indicated a negative high correlation. It was also found that avoidance coping behavior, family self-concept, general self-concept, school and class self-concept, grade and academic achievement were significant predictors of middle school students' stress.

• Korean Institute of Interior Design Journal
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• v.16 no.5
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• pp.126-133
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• 2007

This study is intended to set the concept of becoming meaning of digital space through digital technology and to study the influence of digital space on becoming of real space through derived keyword. The results of this study are summarized as follows. First, the digital concept is created in the process that the virtual space is changed into the real space with a priority given to form, space and time. Digital expression concept and image concept the structural becoming, and idea concept and creative concept creates the time becoming. Second, the concept of digital becoming exposes a physical visibility through the digital's virtual image, and non-space spatiality through the space simulation. It also continuously reveals a consecutive time and non-consecutive time through a statable progress, incremental progress, and dynamic progress. Third, as the influence of digital on becoming of real space, the digital visibly not only expresses the new and difficult becoming problem through conceptual virtuality, but also can review the real space's space concept with virtuality in the digital non-area. Digital's durability expresses the new space's existence by physically combining with the existing space through the virtual form creation.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.26 no.3
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• pp.145-154
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• 2019

Purpose: This study was done to analyze and clarify the concept of empathy in nursing. Methods: Using the concept analysis framework of Walker & Avant 68 articles about empathy were selected for this study. Results: Defining attributes of empathy included recognizing others' perspective and thought, understanding others' emotion, and communicating with them. The antecedents of empathy included contact with patients, respect and trust for patients, a certain level of cognitive ability, and communication skills. Consequences of empathy were increasing patient self-understanding, self-awareness as a therapeutic subject and improving quality of nursing. The concept was clarified through presentation of model, borderline, related, and contrary cases. Conclusion: The results of this study are meaningful in that the concept and attributes of empathy are explored in the area of nursing. Also, based on results of this study, development of standardized tools to measure patient-perceived empathy and measure the three attributes of empathy is recommended as well as the development of educational programs to enhance empathy.

• The Korean Journal of Ecology
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• v.21 no.5_2
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• pp.501-518
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• 1998

Mt. Paektu(2,749.6m)m the biggest mountain in Northeast Asia, located on the border line of Korea and China is characterized as an aspite with broad gentle mountain area and rich biota. however, it seems that the study of forest vegetational feature or vegetation zones in the whole area of this mountain is not yet sufficient in spite of contribution by many investigators. in this paper thermal climatic approach was carried out for the determination of vegetation zones of the mountain with the meteorological data of four stations including Cheonjj and various vegetational data. the application of Warmth Index and/or coldness Index(Kira 1977) for the determination of forest vegetation boundary was useful also here, and their boundaries largely coincided with those of thermal indicies obtained in the Korean Peninsula(Yim and Kira, 1975), including the lapse rate of air temperature along increasing elevation. However, in the mountain the boundary of vegetation zones in not clear like those of mountains in Korea. It may be due so the topographic differences between this area and the Korean Peninsula. Besides, the broad ecotones between different vegetations in this area support the vegetation continum concept rather than the unit concept, and the limit of timber line or tree line reflects various hypothesis(Steven and fox 1991). Therefore, for the explantion of vegetation zone of this area should be considered topography or soil condition, for example, as known the hierachy of ecological units (zonobiomes, orobiomes and pedobiomes, Walter, 1973).