• Journal of the Korea Furniture Society
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• v.16 no.1
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• pp.53-69
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• 2005

This research has a significant meaning to observe and understand the historical condition of a furniture industry and the characteristics of Korean home furniture's formation, ability, skill and materials from 1980s when there were an economic growth and a historical development of Korean home furniture occurred to present days. During 1980s, there was an automatic system available and has enforced and settled the standards on its quality and price in a furniture industry. Also, there was a big trend of black furniture as well as an entrance of corporation and high glossy furniture due to technical cooperation from Europe. In 1990s, there was an entrance of furniture which various techniques was applied due to a high development of the materials and skills, and also various sizes of height and weight and enlargement of acceptance function using highly-technological hardware. After 2000 and now, pro-environmental products is embossed in the Korean home furniture where they added a public issue which is the concept of well being, and A.I and sub material has been pro-environment. There also was a natural unity between nature and technology because of increased usage of trees with its natural patterns, metals, and glasses. For the future development of home furniture design, This problem should be promptly recognized that current home furniture designs are now on the verge of being lack of originality and are just following the market demand and recent trend as it is. Then, there should be a development of its specialized, detailed, unique design as well as a development of advanced materials, production management, distribution, and so on, and carrying out a diversified research continuously. There also should be a systematic education, which is necessary for training specialists to lead the Korean home furniture design industry as well as preparing a basic level for the future without a negligence.

• Journal of environmental and Sanitary engineering
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• v.8 no.2
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• pp.65-84
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• 1993

This study reviewed the current status and problems of sewerage system in Korea and then proposed possible methods to correct the problems. Also, evaluation of future development in sewerage system is included. It can be summarized as follows : 1. Investment in sewerage system is relatively low . 0.23% of GNP, Considering that the investment portion is 0.35% in OECD and 0.63% in Japan, it should be increased further. 2. The reasons wily the investment in sewerage system is low can be ' (1) Low priority is given to the investment in sewerage system. Local government builds and operates its own wastewater treatment plant. Local government as well as residents prefer to invest their money in roadwork, housing and parks to in wastewater treatment facilities because of greater investment effects. (2) Besides capital investment, more maintenance cost is needed for sewerage system. Proper operation of wastewater treatment facilities requires a well-trained operator. Because of public conception that operation of wastewater treatment facility is a dirty job, it is difficult to find a well-trained operator. (3) It is difficult to estimate the effect of sewerage system (4) Cost required to build and maintain wastewater treatment facility should be paid by people, who benefit from the facility. People to benefit are sometimes different from people to pay. 3. Advanced treatment is necessary to protect the bay aura and raw water source as well as to prevent eutrophication of lakes and ponds. 4. Wastewater treatment facility were mainly build in big cities during the decade of 1980. Followings should be solved first to expand the facilities. (1) Rapid repair and construction of sewer. (2) Technical development of wastewater treatment . Prevention of efficient and economical wastewater . Development of efficient and economical wastewater treatment techniques . Development of high-efficiency treatment using bioreactor . Reuse of wastewater treatment plant effluent (3) Sludge treatment and disposal . Composting of sludge cakes . Development of techniques to reduce the volume of sludge cake : incineration and reuse of sludge ash and slag. (4) Utilization of wastewater treatment facilities . Construction of community parks or sports families(ie, on the tops of the covered aeration tanks and sedimention tanks) Construction of wastewater treatment facilities under ground and of parking facilities and community parks above ground. (5) Education of wastewater treatment personal.

• 한국노년학
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• v.25 no.2
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• pp.245-266
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• 2005

This study examined the relationship between parent-child relationship experiences in childhood and adulthood, and individual development and psychological well-being in mid to later life using structural equation modeling with data from 1,882 parents who have at least one child over 18 years old. Findings indicated that receiving more affectionate parenting in childhood was associated with greater generativity development, more positive parental experiences with one's own children, and better psychological well-being in mid to later adulthood. In addition, the effects of received parenting in childhood on psychological well-being after midlife were partially mediated by parental experiences with adult children and generativity development. These findings suggest that early experiences with parents in childhood continuously influence psychological well-being in adulthood through their impact on concurrent family experiences. However, early influences can be redirected through adult experiences too. These findings have implications for the development of intervention programs aimed at promoting volunteer work for older adults, as well as for practitioners who work with families and individuals who are having problems.

• International Journal of Aeronautical and Space Sciences
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• v.11 no.4
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• pp.303-312
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• 2010

This paper introduces the upper stage attitude control system of KSLV-I, which is the first space launch vehicle in Korea. The KSLV-I upper stage attitude control system consists of two electro-hydraulic actuators and a reaction control system using cold nitrogen gas. A proportional, derivative, and integral controller is designed for the electro-hydraulic thrust vectoring system, and Schmidt trigger ON/OFF controllers are designed for the reaction control system. Each attitude controller is designed to have enough stability margins. The stability and performance of KSLV-I upper stage attitude control system is verified via hardware in the loop tests. Hardware in the loop tests are accomplished for perturbed flight conditions as well as nominal flight condition. The test results show that the attitude control loop of KSLV-I upper stage is very stable and the attitude controllers perform well for all flight conditions. Attitude controllers designed in this paper have been successfully applied to the first flight of KSLV-I on August 25, 2009. The flight test results show that all attitude controllers of the KSLV-I upper stage performed well and satisfied the accuracy specifications even during abnormal flight conditions.

• Journal of the Korea Institute of Military Science and Technology
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• v.23 no.3
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• pp.213-220
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• 2020

This paper proposes a method on the performance analysis of pulse repetition frequency jitter compensation for generating Doppler profile. Exact phase compensation of each pulse is required to obtain Doppler profiles under pulse repetition frequency jitter. Three parameters such as velocity, pulse repetition frequency, and carrier frequency are examined to cause errors when conducting the pulse repetition frequency jitter compensation, then assuming well-focused Doppler profiles reflect well-conducted pulse repetition frequency jitter compensation, the proposed method in this paper utilizes the contrast to measure how well Doppler profile is generated. These are validated by electromagnetic computation data and computer simulation. Then, it is concluded which parameter is important on the performance analysis of pulse repetition frequency jitter compensation by using the contrast.

• Journal of Applied Biological Chemistry
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• v.55 no.2
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• pp.71-77
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• 2012

Many of biochemical or physiological processes can be regulated by non-coding RNAs as well as coding RNAs in plants, animals and microbes. Recently, many small RNAs including microRNAs (miRNAs) and endogenous small interference RNAs (siRNAs) and long non-coding RNAs have been discovered from ubiquitous organisms including plants. Biotic and abiotic stresses are main causal agents of crop losses all over the world. Much efforts have been performed for understanding the complex mechanism of stress responses. Up to date, many of these researches have been related with the identification and investigation of stress-related proteins, showing limitation to resolve the complex mechanism. Recently, non-coding RNAs as well as coding genes have been gradually interested because of its potential roles in plant stress responses as well as other biophysical aspects. In this review, various potential roles of non-coding RNAs, especially miRNAs and siRNAs, are reviewed in relation with plant biotic and abiotic stresses.

• Child Health Nursing Research
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• v.15 no.4
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• pp.343-349
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• 2009

Purpose: The purpose of this study was to identify the relationships among self-esteem, meaning in life, and spiritual well-being in middle school students. Methods: The research design was a descriptive correlational survey involving 405 middle school students in grades 1 to 3 in S city, K city, and C city. Data were collected from March to May 2008 using questionnaires. Means with standard deviation, t-test, ANOVA, Duncan post-hoc test, and Pearson correlation coefficients were used to analyze the data. Results: According to general characteristics of the students, there were statistically significant differences in self-esteem for gender, grade, and region, in meaning in life, there were significant differences for grade, gender, and region, and in spiritual well-being, there were statistically significant differences for gender, religion, and region. There were significant correlations between self-esteem and meaning in life, between self-esteem and spiritual well-being, and between meaning in life and spiritual well-being. Conclusion: Self-esteem, meaning in life, and spiritual well-being should be considered as important factors for healthy development in the middle school period. These three variables should be considered as the main content for self-development programs for middle school students.

• Journal of the Korean Home Economics Association
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• v.46 no.5
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• pp.19-33
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• 2008

The main purpose of this study was to assess the effects of SES, mother's psychological well-being, child-rearing behavior and child's peer relationship on school adjustment. A total of 237 children enrolled in the 5th and 6th grade and their mothers were used for this study. Data was collected via questionnaires completed by children and their mothers. The path analysis of antecedent variables influencing child's school adjustment revealed two different patterns. Firstly, socioeconomic status influenced child's school adjustment through maternal psychological well-being. Secondly, maternal psychological well-being affected by socioeconomic status contributed to child's school adjustment through positive child-rearing behavior and positive peer relationship. Focusing on maternal psychological well-being and mother's child-rearing behavior, the implication for promoting child's school adjustment are discussed.

• Korean Journal of Child Studies
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• v.34 no.3
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• pp.21-38
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• 2013

The purpose of this study was to examine the path model of mothers' optimism, parenting behaviors and a child's optimism and the effects on their child's subjective well-being. The subjects of this study consisted of 331 pairs of mothers and their children from 5th and 6th elementary school students in Seoul. Data were gathered via four questionnaires on mothers' optimism reported by mothers and their parenting behaviors, child optimism, and child subjective well-being as reported by the children. Data were analysed by Structural Equation Model using AMOS 19.0. The results indicated the following, the hypothesized model yielded an acceptable model fit and most of the hypothesized path coefficients were found to be significant. Specifically, mothers' optimism and parenting behaviors influence their children's subjective well-being indirectly through children's optimism. It is concluded that the more optimistic the mothers, the more likely the children themselves will share that optimism and in turn, they will also have higher levels of subjective well-being.

• Nuclear Engineering and Technology
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• v.43 no.4
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• pp.375-382
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• 2011

The prospects for growth of the nuclear power industry in Korea have improved remarkably as the demand for energy increases in stride with economic development. Meanwhile, as nuclear energy development is enhanced, nuclear technology has also improved evolutionarily and innovatively in the areas of reactor design and safety measures. As nuclear technology development in Korea advances, more human resources are required. Accordingly, the need for a well-managed program of human resource development (HRD) aimed at assuring needed capacities, skills, and knowledge and maintaining valuable human resources through education and training in various nuclear-related fields has been recognized. A well-defined and object-oriented human resource development and management (HRD&M) is to be developed in order to balance between the dynamics of supply and demand of the workforce in the nuclear industry. The HRD&M schemes include a broad base of disciplines, education, sciences, and technologies within a framework of national sustainable development goals, which are generally considered to include economics, environment, and social concerns. In this study, the projection methodology considering a variety of economic, social, and environmental factors was developed. Using the developed methodology, medium- and long-term nuclear human resources projections up to 2030 were conducted in compliance with the national nuclear technology development programmes and plans.