• Journal of Biomedical Engineering Research
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• v.43 no.6
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• pp.369-374
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• 2022

Purpose: Focused ultrasound is an emerging technology for treating the brain locally in a noninvasive manner. In this study, we have investigated the influence of skull properties on simulating transcranial pressure field. Methods: A 3D computational model of transcranial focused ultrasound was constructed using female and male CT data to solve for intracranial pressure. For heterogeneous model, the acoustic properties were calculated from CT Hounsfield units based on a porosity. The homogeneous model assigned constant acoustic properties for the single-layered skull. Results: A computational model was validated against empirical data. The homogeneous models were then compared with the heterogeneous model, resulted in 10.87% and 7.19% differences in peak pressure for female and male models respectively. For the focal volume, homogeneous model demonstrated more than 94% overlap compared with the heterogeneous model. Conclusion: Homogeneous model can be constructed using MR images that are commonly used for the segmentation of the skull. We propose the possibility of the homogeneous model for the simulating transcranial pressure field owing to comparable focal volume between homogeneous model and heterogeneous model.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.16 no.2
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• pp.70-77
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• 2007

The application of focused ion beam(FIB) technology has been broadened in the fabrication of nanoscale regime. The extended application of FIB is dependent on complicated reciprocal relation of operating parameters. It is necessary for successful and efficient modifications on the surface of silicon substrate. The primary effect by Gaussian beam intensity is significantly shown from various aperture size, accelerating voltage, and beam current. Also, the secondary effect of other process factors - dwell time, pixel interval, scan mode, and pattern size has affected to etching results. For the process analysis, influence of the secondary factors on FIB micromilling process is examined with respect to sputtering depth during the milling process in silicon material. The results are analyzed by the ratio of signal to noise obtained using design of experiment in each parameter.

• Journal of Korean Academy of Nursing
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• v.36 no.8
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• pp.1301-1307
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• 2006

Purpose. To determine the effects of provision of information on mother's problem focused coping ability during their child's intravenous procedure. Methods. Data were collected from 56 mothers whose children have admitted to pediatric ward in the hospital. The participants included 27 intervention group mothers and 29 control group mothers. For the information intervention, 'Programmed Information for Parental Coping before Intravenous Procedure (PIPC- IP)', video program was made based on self-regulation theory for the experimental group mothers. Mother's coping ability was measured by parental supportive behavior, parental beliefs and Profile of Mood State (POMS). Results. Mothers who received PIPC-IP showed significantly higher levels of supportive behavior (t = 3.55, p = .005) and Parental Beliefs (t = 2.95, p = .005), but no significant difference in negative mood on POMS (t = .15, p = .87) compared to mothers in the control group. Conclusions. These results demonstrate that PIPC-IP is an effective intervention to increase the supportive behaviors and beliefs of mothers' problem focused coping ability but not the negative mood.

• Health Policy and Management
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• v.22 no.4
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• pp.628-653
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• 2012

Purpose : This study attempted to find out the relationship between leadership style, knowledge transfer in nursing officers' job, considering the task characteristics. Methods : The data were collected from the military hospital during November 1st to November 17th, 2008 using a structured questionnaire and analyzed with the statistical method of frequency, correlation, and regression analysis, in SPSS 12.0 program package. Results/Conclusion : The results of empirical analysis shows that the levels of job tension and job focused task domain affect the job characteristics of the nursing officers' organization. The job characteristics have a moderating effect on the relationship between leadership style and knowledge transfer. The research is very useful in finding out the job characteristics which well depict military nursing organizations. This research suggests that a desirable leadership styles affect the knowledge transfer in the job characteristics type.

• Journal of the Korean Society of School Health
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• v.17 no.2
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• pp.73-83
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• 2004

Purpose: This study was designed to examine the effects of solution-focused group counseling on the school attitude, self-esteem and hope in school maladjusted adolescents. Methods: The research design of this study was a non-equivalent control group pre-post test design. Thirty middle school students referred to a community mental health center in G city for school maladjustment from a school and welfare center were assigned to the experimental group and thirty middle school students in care for school maladjustment at a welfare center were assigned to the control group. The solution-focused group counseling for the experimental group was conducted once a week for 90 minutes during 6 weeks. The data were collected from December 10, 2003 to May 23, 2004. The data was analyzed by x2-test, t-test and paired t-test using the SAS program. Results: 1) School attitude increased significantly after solution-focused group counseling (t=6.036 p=.001). 2) Self-esteem increased significantly after solution focused group counseling (t=2.705, p=.010). 3) Hope increased significantly after solution-focused group counseling (t=3.671, p=.001). Conclusion: Solution-focused group counseling appears to be a very effective intervention for school maladjusted adolescents by increasing self-esteem, positive school attitude, hope and coping with problems.

• Journal of Families and Better Life
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• v.25 no.6
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• pp.83-94
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• 2007

The purpose of this study was to examine the relationships between ego- resilience and stress coping styles of adolescents. The study also tried to identify differences on stress coping styles based on the level of ego- resilience of adolescents. Ego-resilience showed positive correlations with problem-focused and social support seeking coping styles and a negative correlation with an emotion-focused coping style. Canonical Correlation analysis revealed that self-confidence among four sub-domains of ego-resilience made the most outstanding contributions in predicting stress coping styles of adolescents. The problem-focused coping style had the highest correlation with ego-resilience among the four coping styles. The group of adolescents who had a higher level of ego-resilience reported more problem-focused and social support-seeking coping styles in stressful situations. The results of this study suggested that development of ego-resilience of adolescents who were in the midst of transitions and adjustment problems was important for effective coping strategies.

• Korean Journal of Child Studies
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• v.28 no.3
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• pp.187-199
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• 2007

The relation of parents' emotion socialization to emotionality in their 5-year-old children was studied in 106 mothers and 105 fathers. They reported on their own family-related emotional expressiveness and on their children's negative emotions by questionnaires; mothers rated children on both positive and negative emotionality. Results showed that mothers expressed positive and negative emotions more frequently, and mothers showed more distress, expressive encouragement, and problem-focused reactions to children's negative emotions than fathers. Mothers' emotional expressiveness was related to children's emotionality, whereas only fathers' negative emotional expressiveness was related to children's negative emotionality. Mothers' distress and punitive reactions were associated with children's positive and negative emotionality. Mothers' problem-focused and emotion-focused and fathers' problem-focused reactions were associated with children's positive emotionality.

• Korean Journal of Human Ecology
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• v.16 no.1
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• pp.27-37
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• 2007

The purposes of present study were to investigate relationships among wife abuse, social support, coping styles, and quality of life, and to examine how abused wives' social support influences coping and quality of life. The subjects were consisted of 144 abused wives in Gwangju, Korea. The major findings are as follows; 1. Problem-focused coping and seeking of social support were different by the wife abuse. 2. Abused wives' quality of life was positively related monthly income, social support, problem-focused coping, and wishful thinking coping. 3. The results of the hierarchical regression analysis indicated that the social support had the strongest impact on abused wives' quality of life. And the problem-focused coping, monthly income, and emotion-focused coping. These variables accounted for 32% of variance of abused wives' quality of life.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.31 no.1 s.256
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• pp.139-144
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• 2007

This paper presents development of carbon nanotube (CNT) tip modified by focused ion beam (FIB) and experimental results in non-contact mode of atomic force microscopy (AFM) using fabricated tip. We used an electric field which causes dielectrophoresis, to align and deposit CNTs on a conventional silicon tip. The morphology of the fabricated CNT tip was then modified into a desired shape using focused ion beam. We measured anodic aluminum oxide sample and trench structure to estimate the performance of FIB-modified tip and compared with those of conventional Si tip. We demonstrate that FIB modified tip in non contact mode had superior characteristics than conventional tip in the respects of wear, image resolution and sidewall measurement.

• Journal of Information Technology Applications and Management
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• v.25 no.2
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• pp.117-132
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• 2018

This study examines the reason why consumers try to use the online shopping cart more, and especially analyzes the influence of personal psychological factor such as regulatory focus. Hypotheses are tested with a two-way ANOVA model using experimental data collected from 210 undergraduate students at a business school in South Korea. We found that prevention focused consumers try to use online shopping cart more than promotion focused consumers. It is possible that prevention focused consumers try to consider as many alternatives as possible to ensure safety as they focus on negative results or losses during shopping online. However, we also found out when the buying purpose is utilitarian, promotion focused consumers are not different from the promotion in terms of the usage intention of online shopping carts. Marketing managers can provide different messages customized for their consumers by leading them to use the online shopping cart in a more effective way.