• Transactions of Materials Processing
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• v.16 no.7
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• pp.555-560
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• 2007

This paper shows some achievements at bending of extruded aluminum profiles during the extrusion process. The conventional process for the production of bent profiles involves a successive extrusion, stretching, and bending of the profiles. Conventional bending methods can not meet demands far precision and cost-effective production in some cases, due to cross sectional deformation, irregular decrease of tube wall thickness and a complication of the process design. An estimation of spring-back required for precision of the bending radius can not always be achieved by the over bending of the profile. Since the profile is hot during the bending process, the spring-back phenomenon can be avoided. This means that an additional bending process is not necessary. Consequently, flexible bending can be achieved with cost reduction and quality improvement. Experimental tests were completed to study the relationship between curvature radius of profile and position of guide on the extrusion for vehicle bumper. A7108 is applied as a billet material in order to increase strength. The overall correlation between the experimental and numerical results is good. It is therefore concluded that the present method provides an efficient means for the constant curvature extrusion process.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.6 no.6
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• pp.497-501
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• 2005

Dry film method was applied to fabricate lead-free transparent dielectric fur PDP(Plasma Display Panel). From various slurry compositions, it was able to find out the. best composition for producing high density green sheet. The slurry exhibited shear thinning characteristics which are known to be suitable fur producing a high quality green sheet. The thermal expansion coefficient of the fabricated transparent dielectric was measured to be $97{\times}10^{-7}/^{\circ}C$ which is close to the value of the glass substrate(PD-200). Cross sectional SEM of the transparent dielectric layer on PD-200 showed that the two layers were well attached each other with no observable gaps between them.

• Journal of Korean Academy of Nursing Administration
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• v.16 no.3
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• pp.306-313
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• 2010

Purpose: This study was conducted to examine the factors associated with work related injuries of nurses in small and medium sized hospitals. Method: A cross-sectional survey was conducted with nurses in eight hospitals from October 2007 to January 2008. A questionnaire was designed to collect information on nurses' work related injuries, and individual and job related characteristics. The response rate was 65.1%. Data from 294 nurses were analyzed. Multiple logistic regression analysis was performed to determine factors associated with work related injuries. Result: Of the 294 nurses, 19.1% (n=56) responded as having at least one injury during their job performance. The logistic regression analysis revealed that the significant factors influencing work related injuries were job satisfaction, stress recognition, and hospital's location. Nurses with a higher job satisfaction were less likely to experience work related injuries (OR=0.58). Nurses with a higher stress recognition (OR=2.57) and those working at hospitals in metropolitan cities (OR=3.28) were more likely to experience work related injuries. Conclusions: The result of this study indicated that a substantial proportion of nurses in small and medium sized hospitals had experienced injuries related to nursing job. Interventions to prevent work related injuries among nurses should take into account the job satisfaction, stress recognition, and hospital characteristics.

• The Korean Journal of Rehabilitation Nursing
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• v.11 no.1
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• pp.25-31
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• 2008

Purpose: This study was implemented to investigate perceived illness intrusiveness in stroke patients by the characteristics of primary caregivers. Method: Retrospective cross-sectional survey design was used. The subjects were 225 stroke patients and their primary caregivers. Demographic variables, relationship variables, burden, depression and support were measured as primary caregivers' characteristics. Data were analyzed with SPSS win 14+. T-test, ANOVA and correlation test were used depending on variables. Result: Demographic variables such as age, gender, relation with patients, and living status were not related significantly with illness intrusiveness. But primary caregivers' burden, depression and support were related significantly with perceived illness intrusiveness of stroke patients. That is, burden, depression and quantitative support of primary caregivers were significantly positively correlated with perceived illness intrusiveness of stroke patients. On the other hand, qualitative support was negatively correlated with perceived illness intrusiveness. Conclusion: Primary caregivers' characteristics such as burden, depression and support were found to be correlated with stroke patients perception such as illness intrusiveness. So, it is recommended that nursing intervention targeting burden, depression and support of primary caregivers must be developed to reduce illness intrusiveness of stroke patients.

• The Journal of Internal Korean Medicine
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• v.25 no.1
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• pp.132-137
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• 2004

Background : Recent studies have demonstrated relations between inflammation and stroke. The aim of this study was to investigate CRP level in independent risk factors of stroke patients. Method : Thirty-five ischemic stroke patients were included in this study from Febrary to September 2003. Plasma concentration of CRP was measured over 72 hours after stroke. We examined a average CRP level and associations between CRP and other variables. Result : This study didn't show high CRP level in stroke patients comparing with recent reported studies. Associations between CRP level and other variables didn't show any significant change. Conclusion: In this study, CRP level was not associated with acute stroke significantly.

• Research in Community and Public Health Nursing
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• v.13 no.1
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• pp.98-114
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• 2002

Purpose: This review examined literature relevant to adolescent's health behavior in order to identify key behaviors and factors related to health behaviors for targeting health promotion interventions. Method: A critical review of 29 research articles was carried out using the guidelines suggested by Cooper. Result: The majority of the studies were descriptive and cross-sectional. Generally. the study includes sub-dimensions such as general hygiene and daily life habit, safety and accident prevention, nutrition and eating (tobacco, drinking), exercise, mental health and stress management, health duty (drug, health examination, disease prevention). Factors highly related to health behaviors were age, living areas, economic status, parent health behaviors, parent health concern, social support, friends influence, self-efficacy, self-esteem, locus of control, and the perceived health status. Sex, parent education and health knowledge were not related to health behaviors of adolescents. Conclusion: Several conceptual and methodological problems were identified in the studies review, such as restricted conceptualization of health behaviors and sampling issues which limit the generalizability of the study outcomes. Further research is needed to enhance the concept clarification and generalizablity of the study results.

• Journal of Korean Public Health Nursing
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• v.21 no.2
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• pp.182-192
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• 2007

Purpose: The objectives of this study were to define basic data for developing silver services related to goods, medical care, finance, leisure and residence. Method: In this cross-sectional study, the subjects were 792 pre-elderly and 382 elderly. The data were collected 2005 by using a structured questionnaire from Aug. 19 to Sep. 5. Data were analyzed using descriptive statistics on the SPSS version 12.0 for windows. Result: The pre-elderly had the intention to use massage chair(36.6%), homecare service(29.8%), national pension(35.9%), sports(48.5%) and personal house(59.5%) in the ares of silver goods, medical care, finance, leisure and residence, respectively. The elderly wanted sphygmomanometer(38.7%), homecare service(27.7%), pocket money from their offspring (40.5%), sports(33.5%), and personal house(74.8%). They wanted manpower in the area of reforming of living place, leisure time and education, counseling of silver goods, and management of finance. Conclusion: Based on this study findings, the pre-elderly are thoroughly established for their future than the elderly. It is important to upgrade the silver services and to prepare the manpower for the pre-elderly and the elderly in the future of the aging society.

• Journal of Korean Public Health Nursing
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• v.21 no.2
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• pp.206-216
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• 2007

Purpose: The purpose of this study was to investigate the perceived social support of mothers with disabled children. Method: This study was a cross-sectional, descriptive study using a questionnaire survey which included the standardized measure: personal resource Questionnaire 2000. Results: The participants were 98 mothers, each with one with disabled children. Of the 98 participant's children, 39.8% suffered mental retardation, 34.7% was developmentally disability, 16.3% was brain diseases and 9.2% was multiple disabled. The mean age of the disabled children was 8.2 years and of their mothers was 38 years. The order of the life events for which the need help for the subjects required help were 'when anger and frustration arise happened', 'difficulties in human relationship' and 'emergency situations'. The personal resources were spouse (38.1%), friends (20.9%) and parent (12.9%). The mean score of perceived social support was 5.48 out of a total of 7, indicating a slightly high on social support score. Significant differences were found in the level of perceived social support according to the school grade of disabled child's school grade (F=4.04, p= .02) and the mother having a job presence of mothers (t=2.49, p= .01). Conclusion: These findings indicate a need for nursing intervention programs for mothers with disabled children, including anger management, methods of human relationship, support for leisure time and long term illness and providing information.

• Journal of Korean Public Health Nursing
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• v.28 no.3
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• pp.460-470
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• 2014

Purpose: The purpose of this study was to develop and test the validity and reliability of the Korean version of the expectations regarding aging(ERA-12) among middle-aged and elderly women. Methods: The study was conducted as a cross-sectional survey which used a self-report questionnaire. A convenience sampling method was utilized, and data on 298 middle-aged and elderly women were collected. Korean version of ERA-12 was articulated through forward-backward translation methods. Internal consistency reliability, construct and criterion validity were analyzed using PASW WIN (20.0) for testing the use of Korean version of ERA-12. Results: ERA-12 consisted of three factors - expectations regarding physical health, mental health and cognitive function, explaining 56.0% of the total variance in ERA-12. The ERA-12 total score showed positive correlation with RSES (r=.33). The Cronbach's alpha reliability coefficient was .81 for the overall instrument and .68-.73 for three factors. Conclusion: Korean version of ERA-12 has high validity and reliability. Therefore, this instrument may be utilized to assess expectations regarding aging for Korean middle-aged and elderly women.

• Journal of the Korean Institute of Gas
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• v.15 no.5
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• pp.31-36
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• 2011

In this paper, an analytical model of a cantilever beam having a midpoint load is considered for structural optimization and design. This involves creation of the geometry through a parametric study of all design variables. For this purpose, the optimization of the cantilever beam was elaborated in order to find the optimum geometry which minimizes its volume eventually for minimum weight by FEM (finite element method) analysis. Such geometry can be obtained by different combinations of width and height, so that the beam may have the same cross-sectional area, yet different dynamic behavior. So for optimum safe design, besides minimum volume it should have minimum vibration as well. In order to predict vibration, different dynamic analyses were performed simultaneously to identify the resonant frequencies and mode shapes belonging to the lowest three modes of vibration. Next, by introducing damping effects, the tip displacement and bending stress at the fixed end was evaluated under dynamic loads of varying frequency. Investigation of the results clearly shows that only structural analysis is not enough to predict the optimum values of dimension for safe design it must be aided by dynamic analysis as well.