• Korean Journal of Human Ecology
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• v.13 no.6
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• pp.861-874
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• 2004

The goal of this study is to investigate the relationship between maternal rearing behavior characteristics and elementary school children's Internet use, and to utilize the results as the basic data to develop a program, in which parents learn how to educate their children for better use of the Internet. The subjects were 713 children whose grade are in fourth through sixth in an elementary school. Data were obtained with questionnaires. The instruments employed were Children's Internet Use and Addiction, and maternal rearing behavior characteristics-Rational Guidance, Affection, Authoritarian Control, Overprotection, Achievement Encouragement, and Active Involvement-Scales. The data were analyzed with the SPSS program. They were analyzed by Frequency, Percentage, ANOVA, Duncan's test, and Pearson correlation. The results of this study are as follows: First, 30.2% of the subjects has used Internet for more than three years. 55.6% of the subjects spend less than an hour per day in using the Internet. The two major types of Internet use were playing games(49.9%) and sending e-mails(25.4%). The main reason for playing Internet games was escape from stress(34.7%). 34.5% of the subjects also said that their parents usually encourage them to use the Internet. Second, maternal affection, authoritarian control, and active involvement were significantly different in the types of Internet use. Maternal authoritarian control and overprotection were significantly different in the reasons of doing Internet game. The rational guidance and active involvement of mothers were correlated negatively with children's Internet using time, but their authoritarian control and overprotection were correlated positively with children's Internet using time. Maternal overprotection was correlated positively with parents' encouragement level in the Internet use. Third, the rational guidance, affection, and active involvement of mothers were correlated negatively with children's Internet addiction. In the other hand, maternal authoritarian control and overprotection were correlated positively with children's Internet addiction. Lastly, children's Internet addiction was significantly different by the types of Internet Use and the reasons for doing internet game. Children's Internet using time was correlated positively with children's Internet addiction.

• Bulletin of the Society of Naval Architects of Korea
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• v.3 no.1
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• pp.25-32
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• 1966

For preliminary estimation of ships' machinery weights, many papers giving well-judged data and discussions for rational method of estimation, such as [1], [2], [3], [4], [5], [6], are available, however, they are mostly concerned with large ships propelled by power more than about 2, 000 horsepower. Regarding the medium and small-sized ships, as far as the author is aware, fragmental data and vague discussions found in various technical literature are the all available. In this paper, available data concerned with machinery weights of commercial ships propelled by direct-drive diesel plants of power below 3, 000 horsepower with single screw propeller are collected and analysed to obtain systematic data Fig. 1 and Fig. 2 as weight to power ratio versus power per shaft diagrams together with suplementary data Fig. 1 and Fig. 3. Influences of various factor such as revolutions per minute, mean effective pressure, type and construction of the main units on machinery weights are also investigated in detail to give a better guidance for logical and rational utlization of the proposed diagrams in preliminary estimation of machinery weights.

• The Journal of Korean Academic Society of Nursing Education
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• v.22 no.3
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• pp.334-344
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• 2016

Purpose: The study was conducted to investigate the effect of career barrier, satisfaction, and career decision making pattern on career search behaviors in male nursing students. Methods: Data were collected through structured questionnaires that included general characteristics, career barrier, satisfaction, career decision making pattern and career search behaviors and were analyzed by descriptive statistics, ANOVA, t-test, Pearson correlation coefficient and multiple regression using SPSS/PC+ program. Results: The results of the research suggest the two aspects of career search behaviors as being self-exploration and environmental exploration. The rational pattern, among the types of satisfaction and career decision making pattern, was found to have a meaningful effect on self-expression. On the other hand, dependent pattern, among the satisfaction and career decision making pattern, was found to have an effect on career search patterns. Conclusion: It is considered that, based on the results of this study, diversified approaches that consider individual career decision making patterns such as rational pattern and dependent pattern as well as the methods to enhance the satisfaction of male nursing college students for career guidance are needed.

• Journal of Families and Better Life
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• v.28 no.1
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• pp.119-130
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• 2010

The purpose of this study is to develop and evaluate a parent-child reading interaction program. Based on the importance of the parent-child relationship and the home literacy environment vis-a-vis the extent to which reading is encouraged, and with regard to the existing empirical research in this field, a five-session parent-child reading interaction program has been developed, targeting 18 parents with children enrolled in th lower grades of elementary school. The effectiveness of this program has been evaluated by a pretest and post test and then analyzed by a paired t-test. The findings are as follows: 1) Following the implementation of this program, there were improvements in scores related to the home literacy environment, the encouragement of reading, and the attitude of the child toward reading. 2) In addition, there was an increase in the level of the mother's "rational guidance" parenting while tendencies toward overprotective and hostile parenting traits declined. The importance of the parent-child relationship and home literacy environment concerning reading guidance was discussed.

• Journal of the Korean Home Economics Association
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• v.51 no.1
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• pp.97-106
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• 2013

The purpose of this study is to examine the effects of the Seesaw & Swing early intervention program on the positive changes of mothers with young children who come from low-income families. It measures their child-rearing efficacy and their child-rearing behaviors. The Seesaw & Swing early intervention program was developed by the Community Chest of Korea [13]. The subjects for this study consisted of 96 mothers (49 in the service group, 47 in the control group) from low-income families. The instruments used were the child-rearing efficacy scale [4] and the child-rearing behavior scale [29]. The results of this study indicated that the Seesaw & Swing early intervention program produced positive effects in child-rearing efficacy as well as in child-rearing behaviors: namely, healthy-rearing abilities, guidance abilities, and discipline abilities in child-rearing efficacy; and affection, rational guidance, authoritative control, encouragement and concern in child-rearing behaviors. In conclusion, for mothers with young children coming from low-income families, the Seesaw & Swing early intervention program can be said to be an effective parent education program, which goes some way towards ending the intergenerational transition of poverty in Korea.

• Korean Journal of Child Studies
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• v.18 no.1
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• pp.125-142
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• 1997

The purpose of this study was to examine the relations between maternal traditional-modern values, childrearing practices and children's social behaviors. The subjects were 500 fifth grade elementary school children and their mothers, and teachers, and peers in the same classroom. The data were collected through questionnaires on maternal traditional values, perceived maternal childrearing practices, and children's social behaviors. Traditional maternal values focused on familial collectivism and politeness. The major results were as follows: (1) Maternal traditional values were positively related to childrearing practices in both maternal affection rational guidance and authoritarian control. (2) Maternal traditional values did not directly influence children's social behavior but showed an indirect moderating effect through maternal childrearing practices. Implications were discussed in terms of the importance of traditional values on childrearing behavior as well as the development of children.

• Journal of Soil and Groundwater Environment
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• v.10 no.5
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• pp.1-10
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• 2005

Policies of the United States, the United Kingdom, the Netherlands, Germany and Denmark were compared and analyzed on risk assessment of contaminated sites. These countries were chosen from a feasible preliminary analysis of 18 countries of the European Union and the U. S. All the countries selected met two major criteria : I) implementation of risk assessment to determine the soil contamination and remediation targets of contaminated sites, ii) use of soil guidance values and risk assessment as complementary measures to determine soil contamination. Suggested policy improvements to Korea regarding these issues include i) legislation of a rational risk assessment methodology of contaminated sites, and ii) enactment of collaboration of risk assessment with the soil guidance values. To establish effective risk assessment legislation, additional in-depth research on social, economic and long-term effects of the proposed risk assessment methodologies, as well as the mutual consent of all parties including academia, industry, and administration will be necessary. Linking risk assessment with soil guidance values would be applicable to a site contaminated where the contaminant concentration exceeds a certain soil guidance value. In parallel, application of risk assessment to a site where a contaminant concentration is naturally different such as mining sites would be plausible. The policy suggestions above are not yet conclusive due to a lack of policy implementation, and simulation. Thus, additional research on developing risk assessment methodology is needed. Nevertheless, initiation of the suggested policy would increase the efficacy of Korean policy regarding the survey and remediation of contaminated sites.

• Journal of Microbiology and Biotechnology
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• v.26 no.4
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• pp.739-747
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• 2016

The rational utilization of crop straw as a raw material for natural gas production is of economic significance. In order to increase the efficiency of biogas production from agricultural straw, seasonal restrictions must be overcome. Therefore, the potential for biogas production via anaerobic straw digestion was assessed by exposing fresh, silage, and dry yellow corn straw to cow dung liquid extract as a nitrogen source. The characteristics of anaerobic corn straw digestion were comprehensively evaluated by measuring the pH, gas production, chemical oxygen demand, methane production, and volatile fatty acid content, as well as applying a modified Gompertz model and high-throughput sequencing technology to the resident microbial community. The efficiency of biogas production from fresh straw (433.8 ml/g) was higher than that of production from straw silage and dry yellow straw (46.55 ml/g and 68.75 ml/g, respectively). The cumulative biogas production from fresh straw, silage straw, and dry yellow straw was 365 l^-1 g^-1 VS, 322 l^-1 g^-1 VS, and 304 l^-1 g^-1 VS, respectively, whereas cumulative methane production was 1,426.33%, 1,351.35%, and 1,286.14%, respectively, and potential biogas production was 470.06 ml^-1 g^-1 VS, 461.73 ml^-1 g^-1 VS, and 451.76 ml^-1 g^-1 VS, respectively. Microbial community analysis showed that the corn straw was mainly metabolized by acetate-utilizing methanogens, with Methanosaeta as the dominant archaeal community. These findings provide important guidance to the biogas industry and farmers with respect to rational and efficient utilization of crop straw resources as material for biogas production.

• The Journal of the Convergence on Culture Technology
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• v.9 no.3
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• pp.851-859
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• 2023

This paper proposes a web service that provides consumers with necessary information to make rational purchases of bottled water. The web service or dedicated mobile application introduced in this paper offers brand-specific manufacturer information and bottled water brand information produced by manufacturers. In addition, detailed information about the manufacturer such as location, environmental quality grade of the Ministry of Environment, and brand/capacity-specific prices are provided to consumers who use the proposed service in this paper. By utilizing the proposed service in this paper, users can receive guidance on how to make rational purchases of the bottled water they need, enabling them to consume economically and healthily.

• Journal of Korean Home Economics Education Association
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• v.12 no.1
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• pp.75-87
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• 2000

The purpose of this study is to find out how middle and high school girls show their clothing attitudes and their life-style. clothing behavior. use their ornaments according to demographic variables. The subject of this study consists o 345 middle and high school girls living in Chung-Nam Province and Taejon Metropolitan City. SPSS/PC+ program was utilized to calculate frequency(N) mean value(M) and standard deviation (SD) for statistical analysis. Differences among the populations are examined through t-test. F-test and X2-test. The results of this study are as follow : 1. Correlation between the life style and demographic variables. Especially. life-style has significant difference(p<. 05) according to type of school. middle school girls have high tendency in the type of modern and fashion. Life-style has significant difference(p< .01) according to level of achievement studying, high level girls has high tendency in the type of practical and secure. 2. Correlation between the clothing behavior and demographic variables. According to type of school. middle school girls showed higher than high school girls in clothing conformity and clothing aesthetics. According to level of achievement studying, high level girls have high tendency in clothing conformity and clothing modesty. 3. Correlation between the use their ornaments and demographic variables. Buying the ornaments, higher-level achievement studying girl’s get information in show window. but lower-level achievement studying girl’s get information in TV or radio. The use of ornaments according to the site of school, most of school girls who live in small city or town use the ornaments as usual school life but school girls who live in big city use the ornaments to look good on their clothes. Following suggestions can be made based on the discussions above: It is necessary for us to have correct understanding about the correlation between the ornaments and clothing of school girls in order to lead them to have appropriate clothing behavior. Furthermore. it is required to construct a bridge linking a course of study to rational habits guidance which will provide us more appropriate tools for clothing behavior guidance.