• Journal of the Korean Home Economics Association
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• v.42 no.5
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• pp.107-126
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• 2004

As the information society matures, an analysis on possible outputs of internet usage is needed. Thus, this study was peformed in order to understand the utility cognition and negative outputs of internet users. The method used in this study was a web-based questionnaire that was administered to the internet users. Five hundred married men and women were analyzed with a factor and a multiple regression analysis. Results were as follows: First, many kinds of internet usages - information searching, internet shopping, electronic mail, instant messaging, and decision-making dependent on internet information - were differentiated with age. Second, the altitude about the internet was an important explanatory variable in the types of internet usage. Third, negative outputs of internet usage were great in terms of information resource management and unbalanced scheduling in daily time spent. Fourth, utility cognition was affected by qualitative elements on internet usage more than the quantitative ones.

• Proceedings of the KIEE Conference
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• 2001.05a
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• pp.172-175
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• 2001

This paper presents a new energy function reflecting the damping effect in multi-machine power systems. The Lyapunov direct method provides precise and rigorous theoretical backgrounds for stability analysis of nonlinear systems. Incorporating damping effects into accurate estimates of the domain of attraction, which is a minor but crucial point, has been attempted with long history to yield partial success for single machine systems. In this paper, the damping-reflected energy function presented in the previous work has been generalized for application to multi-machine systems. The generalized energy function is tested for the WSCC 9-bus system to show the semi-negativeness of its time derivative.

• Proceedings of the KIEE Conference
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• 1996.11a
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• pp.84-87
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• 1996

This paper presents a energy function to reflect the control effect of speed governor which has a cut-off property which means position and rate limit The proposed energy function satisfies the semi-negativeness of its time derivative and well reflects the parameters of speed governor to the energy function. The transient stability analysis by the direct method for the single machine infinite bus system has been conducted with the use of the proposed energy function, which shows that the results by the direct method well agree with that by the conventional time simulation method. This thesis shows a possibility of more accurate stability analysis by taking into account the cut-off property of speed governor's output.

• Korean Parent-Child Health Journal
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• v.15 no.1
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• pp.1-13
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• 2012

Purpose: The purpose of this thesis is to investigate the experience of children with a schizophrenic parent. Methods: The research methods included biographical in-depth interviews, structured questionnaires, and child's drawings. Data were collected from September until November, 2005 at one university hospital, and interviews were recorded on audio tapes and thereby transcribed. The subjects were three adolescent children (10~15 years old) of a parent with schizophrenia. Results: This study has five themes: It is often the case that the children with a schizophrenic parent are uninformed about their parent's illness, have difficulties dealing with symptoms are confused about their parent's image and display contradictory feelings of fear and sympathy toward their father; The children tend to harbor expectations on mother's role in the family affairs, and simultaneously show pity for her; Family relations without solidarity caused by the absence of their father make the children feel severance, separation, and isolation in and out of the family; The children feel the burden to assume additional household responsibilities; The children are reluctant to mention their father's disease. Conclusion: the study subjects have met negativeness in both developmental characteristics and needs, which supports the need for intervention programs that meet their actual experience.

• Journal of electromagnetic engineering and science
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• v.12 no.1
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• pp.26-31
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• 2012

We have proposed a metamaterial lens that enables sub-wavelength focusing, which is shorter than an operating wavelength. Our lens is a two dimensional array of a unit cell consisting of a metallic dual-plate printed on a dielectric substrate. The unique dual-plate structure provides negativeness both in permittivity and permeability, with no help from conventional additional structures, which are normally printed on the opposite of metallic patterns. Therefore, we can focus a source (or an image) in a tiny distance shorter than the free space wavelength (${\lambda}$) at the frequencies of interest. Furthermore, since the proposed geometry does not need separate supplementary structures to acquire negative permittivity or permeability, our lens is much simpler than conventional metamaterial lenses, which is a strong point in practical applications. We have validated sub-wavelength focusing ability in a 6 GHz frequency band through an experiment of near field scanning, which provided the width of about 0.19 ${\lambda}$ at a half maximum of a peak value of an measured image. The width of the focused image through the lens is more than 4 times shorter than that without the lens, which confirms the validity of our design approach.

• Journal of the Korean Home Economics Association
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• v.36 no.8
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• pp.21-37
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• 1998

The purpose of this study was to review the importance of authoritative parenting for children's social adjustment. From the review it was suggested that the importance of authoritative parenting might be different according to the cultural contexts, which are Western and Asian cultures, and aggressive and social withdrawal behaviors. From the comparative cultural viewpoint, authoritarian parenting is not considered negatively by Asian parents, comparing with Western parents. Therefore the assumption that authoritative parenting has universal positiveness and authoritarian parenting has universal negativeness should be reconsidered. Regardless of cultures, children's aggressive behavior was related to the authoritarian parenting positively. But, in Asia, especially in China, the social withdrawal did not show at least negative relation with authoritative parenting. And it was reported that the authoritarian parenting could contribute to the change of inhibited behavior and enhancing the social adjustment. In addition, some implications were suggested for future researches about the relation between children's social adjustment and child rearing practices. Though this literature review was not exclusively based on the empirical studies, it would be valuable for reconsidering the perspective of Korean developmentalists interested in the relation between parenting and children's development in Korean culture.

• Hwankyungkyoyuk
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• v.23 no.4
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• pp.32-43
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• 2010

This study was performed to know about the conformity tendencies of adolescent and adult groups based on lectures of the expert on the topic 'the cicada'. Characters of each lecture were 'he pure natural science', 'positiveness', 'negativeness' and 'neutrality,' and then attitude changes on the cicadas were investigated with a questionnaire. Consequently, half of the adolescent and adult groups thought of the cicadas' sounds as 'noise' through mass communications respectively. They had a neutral attitude, neither positive nor negative, on cicadas' sounds in the beginning. Attitudes of the people on the cicada, however, were changed positively only with a pure natural science lecture. In this case, the adolescent group was more prevalented by the lecture than the adult group. In other words, the positive-based lecture affected them positively, while the negative-based lecture affected them negatively. The conformity tendencies of adolescent groups participating in the positive-based lecture were substantial. In conclusion, as we can see from the so-called Kohlberg's 'stages of moral development', conformity tendencies of attitudes towards cicadas' sounds were generally much more prevalent in the adolescent group, compared with the adult group, even though there are some differences in subcategories.

• Journal of Korean Physical Therapy Science
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• v.4 no.2
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• pp.439-452
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• 1997

Mothers of handicapped children experience many problems and difficulties related to the child's prolonged dependency and demands for special care. Social support can be identified as stress-relieving factor, social support is considered to decrease the amount of negativeness in an individual or family. This study attempted to identify the level of burden and social support in mothers of children who are handicapped, and to determine whether social support is an effective strategy for burden relief in these mothers. The method used in the study was a correlational descriptive survey using a questionnaire. The subjects for the study were 42 mothers who have the handicapped children, between two to twelve years of age, being treated at S General Welfare House for Handicapped and S Rehabilitation Center in Seoul. The data were collected during 1 month from March 20 to April 20, 1996. The instruments used for this study was a structured questionnaire which was the Burden scale developed by Suh Mihae and Oh Kasil(1993) and the PRQ(Personal Resource Questionnaire) scale developed by Brandt & Weinert(1981). The collected data were analyzed using the SPSS computer program, yielding frequencies, percentiles, means, standard deviations, $x^{2}$-test, Pearson's correlation coefficienct, t-test and ANOVA. The results of this study are as follows ; 1)The range of age in the subjects was $29{\sim}44$ years, the range age in the handicapped children was $2{\sim}12$ years. 2) The mean score of burden, for the mothers of the handicapped children was 2.75(standard deviation was 0.47) of a possible total of 5. 3) The mean score of social support, for the mothers of the handicapped children was 4.99 (standard deviation was 0.59) of a possible total of 7. 4) There was an negative correlations hip between burden level and the social support, but there was no statistically significant correlationship between burden level and the social support(r = -.2252, p = .076) 5) In the general characteristics influencing on the burden level was significantly related with the sex(t = - 2.87, p = .007) and the degree of child's handicap level(F = 11.8680, p = .000l). In the general characteristics influencing on the social support was significantly related with the family(husband) support(F = 3.5199, p = .0240). There were significant differences in the mother's levels of burden depending upon the severity of child's handicap. In other words, the degree of mother's burden was directly proportionate to the degree of child's handicap level. There were significant differences in the mother's levels of social support depending upon the family(husband) support. In conclusion, on the basis of the results of this study, there was no statistically significant correlationship between burden level and the social support. Above results suggest that strategies for the intervention programs in diminishing the mother's burden and reinforcing the social support.