• Korean Journal of Materials Research
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• v.28 no.9
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• pp.495-498
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• 2018

Intermetallic compound matrix composites have been expected to be established as high temperature structural components. $Ni_3Al$ is a representative intermetallic alloy, which has excellent ductility even at room temperature by adding certain alloying elements. $Ni_3Al$ matrix composites with aluminum oxide particles, which are formed by the in-situ reaction between the alloy and aluminum borate whiskers, are fabricated by a powder metallurgical method. The addition of aluminum borate whiskers disperses the synthetic aluminum oxide particles during sintering and dramatically increases the strength of the composite. The uniform dispersion of reaction synthesized aluminum oxide particles and the uniform solution of boron in the matrix seem to play an important role in the improvement in strength. There is a dramatic increase in strength with the addition of the whisker, and the maximum value is obtained at a 10 vol% addition of whisker. The $Ni_3Al$ composite with 10 vol% aluminum oxide particles $0.3{\mu}m$ in size and with 0.1 wt% boron powder fabricated by the conventional powder metallurgical process does not have such high strength because of inhomogeneous distribution of aluminum oxide particles and of boron. The tensile strength of the $Ni_3Al$ with a 10 vol% aluminum borate whisker reaches more than twice the value, 930 MPa, of the parent alloy. No third phase is observed between the aluminum oxide and the matrix.

• Journal of Families and Better Life
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• v.1 no.2
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• pp.127-138
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• 1983

The purpose of this study is to investigate the family values and the factors of satisfying family life. Throughout the study the changes of family values and marital satisfaction were examined. The results of the study are as follows; 1) Whereas the family values of people living in urban community were modernized to a great extent- in position of wife, role of husband and wife, preference between son and daughter, view on filial piety- the family values of people living in rural community were remained its traditional form. Form both areas modernization of family values was found in support of old parent. 2) Both Seoul and Andong showed the significant difference on family values according to subjects' education and age. In Seoul, the socio-economic level was influential factor in determining subjects' family values. 3) Marital satisfaction was found higher among people living in rural community than in people living in urban community. Since its very important not only to the individual but also to the society for a human being to be content in his surrounding , the reestablishment of the housewives family values should be followed so that other family members may approach the modernized family values.

• Journal of Families and Better Life
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• v.30 no.1
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• pp.1-13
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• 2012

The purposes of this study were to find the correlation of family abuse experience, social maladaptation, ego resilience and daily life satisfaction in university students, and to explore the mediating role between ego resilience between family abuse experience, social maladaptation and daily life satisfaction. The subjects were 265 university students. The data were analyzed with frequency, Pearson's correlation and structural equation modeling by SPSS and AMOS. Instruments were Bradburn(1969)'s The Structure of Psychological Well-being, Olson and Barnes(1982)' Quality of Life, Straus(1988)'s CTSPC(Parent-Child Conflict Tactics Scales), Shin(2001)'s social maladaptation of Korean General Health, and Block and Kremen(1996)'s ego resilience. The major findings were as follows; Family abuse experience and social maladaptation were negatively correlated with ego resilience and daily life satisfaction. Ego resilience was positively correlated with daily life satisfaction. Ego resilience mediated the effects of family abuse experience, social maladaptation and daily life satisfaction. Family abuse experience and social maladaptation negatively influenced ego resilience and daily life satisfaction. Ego resilience positively influenced daily life satisfaction. Thus special education program and counseling should be provided to increase university students' daily life satisfaction through in order to built ego resilience.

• The Korean Journal of Community Living Science
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• v.26 no.2
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• pp.375-386
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• 2015

This study examines the effects of parent-child attachment across the child's life from a life-span developmental perspective. The study investigates the effects of a child's attachment to his or her mother in childhood on his or her school attachment as an adult student and explores the role of self-esteem as a mediator of the relationship between these two variables. A total of 529 S Cyber University students taking social welfare classes participated in this study. These students completed a questionnaire about their present level of self-esteem, attachment to their mother in childhood, and school adjustment. According to the SEM results, adult students' self-esteem fully mediated the relationship between their mother-child attachment in childhood and their school adjustment in adulthood. Attachment security for the mother in childhood was related to the child's own internal working model, and positive self-esteem was related to school adjustment.

• Journal of Fisheries and Marine Sciences Education
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• v.29 no.2
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• pp.466-478
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• 2017

The purpose of this study was to examine the relationships between perceived parental attachment and the life satisfaction of college students, focusing on the mediating role of psychological basic needs(autonomy, competence and relatedness). The Participants of this study were 208 college students. The result was statistically treated using SPSS 21.0 program, Amos 21.0. Additionally, PROCESS Macro was used to verify the significant mediating effect. Results from structural equation modeling analyses indicated that a research model produced a better fit to the data than a alternative structural model. The final SEM model fit indices of $x^2$(df), CFI, TLI, RMSEA were met the acceptable criteria of model fitness. In other words, among the goodness-of-fit indexes of the final study model, $x^2=261.075$(p<.001), RMSEA is .082, TLI equals .925, CFI equals .940. The results showed the following: First, Parental attachment has a direct effect on autonomy, competence and relatedness. Also competence and relatedness have a direct effect on the life satisfaction. Second, Competence and relatedness showed a mediating effects on Parental attachment and the life satisfaction. The implications of these results were discussed and the further studies were suggested.

• Journal of Families and Better Life
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• v.29 no.6
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• pp.41-54
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• 2011

The purposes of this study were to find correlation between family abuse experience, family stress, social support, family resiliency and happiness in university students, and to explore the mediating role of social support and family resiliency between family abuse experience, family stress and happiness. The subjects were 295 university students. The data were analyzed by means of frequency analysis, Pearson's correlation and structural equation modeling with SPSS and AMOS. Instruments were Lee's(2010) Happiness Scale for university students, Strauss'(1988) CTSP(Parent-Child Conflict Tactics Scale), McCubbin's(1981) FILE(Family Inventory of Life Events and Changes), Yu's(2004) Family resiliency of Family Health Scale and Park's(1985) Social Support Scale. The major findings were as follows; Family abuse experience was positively correlated with family stress and negatively correlated with social support, family resiliency and happiness. Family stress was negatively correlated with family resiliency. Social support and family resiliency were positively correlated with happiness. Family abuse experience positively influenced family stress and negatively influenced social support and family resiliency. Social support positively influenced family resiliency and happiness. Family stress negatively influenced family resiliency. Family resiliency positively influenced happiness. Thus education program and counseling should be provided to increase happiness and family resiliency, and social support should be provide to increase the quality of life for university students.

• Journal of the Korean Home Economics Association
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• v.41 no.1
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• pp.59-76
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• 2003

The relationship between adolescent children and parents has a profound effect on not only the adolescents development into healthy adults but also the psychological welfare of the parent. A program focused to improve adolescents relationship with parents has not been developed until now. To achieve the educational goals enhancing mutual understanding, it is more effective to educate both the parents and adolescent children. Thus, this study developed and carried out a program in which adolescent children and mothers, being fully in charge of raising children, participated. The study analyzed the program effects after implementing on 6 pairs of adolescent children and mothers. The results are as follows: 1) adolescent children and mothers placed high values on the fact that they can understand each other well, 2) both parties accepted each other by recognizing the inevitability of the generation gap, and 3) the program gave them a chance to admit that they should try to communicate openly. Most of all, adolescent children could find self-confidence while mothers could collect valuable data essential to raise children and build a new mother's role model adapting to social changes.

• Journal of the Korea Institute of Military Science and Technology
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• v.16 no.4
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• pp.507-513
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• 2013

Transparent bulletproof windows play an important role in the munitions industry. The thickness of bulletproof windows including soda-lime silicate(SLS) glass, polyvinyl butyral, poly urethane, main defense(200MD), and safety film was reduced from 40mm to 29mm by adjustment of SLS glass laminated array. Borosilicate glasses generally have lower surface density and more excellent mechanical properties than SLS glass. Borosilicate glass was strengthened by ion exchange in the $KNO_3$ powder. The maximum mechanical properties were observed at $550^{\circ}C$ for 10min. The Vickers hardness, fracture toughness and 3-point bending strength of ion exchanged samples were about $775kg/mm^2$, $1.91MPa{\cdot}m^{1/2}$ and 764MPa each, which are about 27%, 149% and 249% higher than parent borosilicate glass, respectively. The penetration depth of K+ ion at $550^{\circ}C$ for 10min was $59.8{\mu}m$. As a result, the transparent bulletproof windows were predicted to be more lightweight by ion exchange of borosilicate glass. If the SLS glass for bulletproof windows is replaced by ion exchanged borosilicate glass, the bulletproof windows can be expected to be lightweight and thinner.

• Journal of Korean Neurosurgical Society
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• v.30 no.sup2
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• pp.332-336
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• 2001

This 18-year-old male patient had a massive epistaxis after motorcycle traffic accident on 1st day of admission. There were no other significant brain parenchymal lesion on initial brain CT exam, except multiple pneumocephalus and basal skull fracture lines. We treated epistaxis conservatively till vital signs were corrected, and then conventional cerebral angiogram was followed. On angiogram, there was traumatic pseudoaneurysm on C5 portion(by Fischer) of ICA, so we treated it only by endovascular stenting. For the purpose of sparing parent arterial patency, endovascular stenting on pseudoaneurysm may play a role with safety and good results.

• Journal of Korean Neurosurgical Society
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• v.29 no.4
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• pp.491-499
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• 2000

Objective : In the cerebral aneurysm surgery, the goal is complete circulatory exclusion of the aneurysm without compromise of normal vessels. In an operating room, an operator should confirm the completeness and precision of the surgical result, before closing the wound. Object of this study was to determine which cases require intraoperative angiography. Methods : We reported our experience with 48 intraoperative angiographic studies performed during the surgical treatment of cerebral aneurysm of these 48 cases. There were 5 giant(10.4%), 15 globular(1.5-2.5cm)(31.25%) and 28 saccular(58.3%) aneurysm. We recorded the incidence of unexpected findings, such as residual aneurysms, major vessel occlusions. Using Fischer's exact test, we assessed whether unexpected angiographic findings showed any correlation with aneurysm site, size and clinical findings. Results : In 5 cases(10.4%), we detected unexpected angiographic findings which resulted in clip adjustment. By means of clip adjustment, an operator could restore the flow of two major arterial occlusion(4.2%) and also obliterate three persistent filling aneurysms(6.3%). Globular aneurysm was the only factor to predict unexpected angiographic findings(p<0.05). The subgroup of globular and giant aneurysm has a high risk of occlusion of the parent artery and its branches and/or residual aneurysm. There were two minor complications related to this procedure. Conclusion : Intraoperative assessment makes it possible to recognize and correct the technical defect. Particularly in globular aneurysm, we were able to prevent both the chance for another operation and the risk of postoperative complications.