• 한국가시화정보학회지
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• 제20권1호
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• pp.52-63
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• 2022

Direct numerical simulation of blood flow in a stenosed, patient-specific carotid artery was conducted to explore the transient behavior of blood flow with special emphasis on the wall-shear stress distribution over the transition region. We assumed the blood as an incompressible Newtonian fluid, and the vessel was treated as a solid wall. The pulsatile boundary condition was applied at the inlet of the carotid. The Reynolds number is 884 based on the inlet diameter, and the maximum flow rate and the corresponding Womersley number is approximately 5.9. We found the transitional behavior during the acceleration and deceleration phases. In order to quantitatively examine the wall-shear stress distribution over the transition region, the probability density function of the wall-shear stress was computed. It showed that the negative wall-shear stress events frequently occur near peak systole. In addition, the oscillatory shear stress index was used to further analyze the relationship with the negative wall-shear stress appearing in the systolic phase.

• Journal of the Korean Wood Science and Technology
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• 제32권3호
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• pp.33-41
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• 2004

In ancient wooden structures, the mechanical properties of the structural members have been reduced by time-dependent degradations such as fatigue or creep. Also, the external and internal deterioration was caused by environmental condition, fungi, bacteria, or insect, and then reduced the quality of structural members. However, the previous methods for evaluating the deterioration have been mainly depended on the visual inspection. In this study, therefore, ultrasonic stress wave test, accelerometer stress wave test were used to evaluate the deterioration of structural wood members in ancient wooden structures. Based on the results, the quantitative criteria of stress wave transmitted velocity were proposed to evaluate the deterioration of structural member. The proposed criteria were related to the degree of deterioration. In accelerometer stress wave, the criteria of deterioration of wave reciprocal velocity was below 1800 ㎲/m at incipient deterioration (below 12% ratio of deterioration), between 1800 and 2200 ㎲/m at moderate deterioration (12~17%) and above 2200 ㎲/m at severe deterioration (above 17%). The ultrasonic stress wave, the criteria of deterioration were 800 and 950 ㎲/m at below 8% and above 15% of the degree of deterioration respectively.

• 성인간호학회지
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• 제22권2호
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• pp.121-129
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• 2010

Purpose: In numerous studies, MBSR programs have been shown to reduce stress and improve health-related QOL. Although MBSR programs have been shown to be beneficial, its effects have not been well-determined among Korean populations in clinical nursing practice. The purpose of this review was to describe the effects of MBSR on stress and health-related QOL so that the potential benefits of this intervention may be evaluated for wider application in Korea. Methods: Articles published in peer-reviewed journals in the English or Korean language up to 2009 were reviewed; 14 articles met the inclusion criteria for this review and there were no Korean papers. Results: MBSR groups were found to have significantly reduced stress outcomes relative to non-MBSR groups in 6 of 11 studies. In regards to health-related QOL, participants of the MBSR programs had increased scores after MBSR intervention relative to control groups in 5 of 7 studies. Conclusion: MBSR programs was effective in decreasing stress and increased the health-related QOL in the majority of studies reviewed. MBSR merits study in Korean patients to determine whether similar salutary patient outcomes may be obtained.

• 정신신체의학
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• 제5권1호
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• pp.97-107
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• 1997

As a preliminary step to develop the Daily stress Inventory(DSI) for assessing minor stressors frequently experienced in everyday lift. We examined the reliability and validity of the DSI. The Daily Stress Inventory(DSI), the Beck Depression Inventory(BDI), the State-Trait Anxiety Inventory(STAI), the Social Readjustment Rating Scale(SRRS) and the Minnesota Multiphasic Personality Inventory(MMPI) were administered to 111 college students. Compared with the weekly DSI Event, Impact and I/E ratio scores of the American college students, the weekly event and I/E ratio scores of the Korean college students were significantly higher but weekly Impact score was lower. The internal consistency reliability of the DSI as computed by Cronbach alpha was .98. The DSI I/E ratio scores were significantly correlated with the scores of State Anxiety$({\gamma}=.27)$ and Trait Anxiety${\gamma}=.24)$, but not with BDI scores. And the SSRS scores were not significantly correlated to the DSI Event or Impact and In ratio scores. Significant correlations were revealed between the DSI Impact scores and the Sc and Ma scales of the MMPI. And the correlation between the DSI I/E ratio scores and the L, D, Hy, Pd and Pa scales of the MMPI was also significant. But no significant correlation was found between the DSI Event scores and all the scales of the MMPI. This study suggests that the DSI can be a reliable and valid tool to assess the minor stress frequently experienced in everyday life future study should be directed to obtain normative data based on more varied and larger population. Especially gathering additional evidences for the validity of the DSI using other minor stressor scale will be required.

• 한국엔터테인먼트산업학회논문지
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• 제14권2호
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• pp.237-247
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• 2020

본 연구의 목적은 간호대학생의 스트레스 경험을 확인하기 위해 Q 방법론을 적용하여 간호대학생의 스트레스 유형을 확인하고 유형별 특성을 확인하는 것이다. 문헌고찰과 인터뷰를 통해 57개의 진술문을 도출하였다. Q 카드는 13점 만점으로 40명의 간호대학생들을 대상으로 정규분포형태로 분류하였다. 수집된 데이터는 PC QUANL 프로그램에 의해 분석되었다. 연구결과 간호대학생들의 스트레스 경험은 4가지 유형으로 분류되었다. 유형 I은 교과과정 부담형, 유형 II는 경제자립 목표형, 유형 III은 아웃사이더 좌절형, 유형 IV는 성장 정체형이었다. 본 연구결과를 대상자의 유형에 따른 중재프로그램을 개발하는 데 활용할 수 있을 것이다.

• 대한의용생체공학회:의공학회지
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• 제35권6호
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• pp.197-202
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• 2014

The cognitive rehabilitation training is important for treating many cognitive impairment conditions, including Parkinson's disease, stroke, and ADHD. In this study, we developed a new evaluation system to improve the measurement of the conventional evaluation systems for cognitive rehabilitation training. The developed system measured the activity of dopamine(DA) and an autonomic nervous system(ANS) with photoplethysmography and electromyography. The results demonstrated that the cognitive capacity was increased but the activity of DA was decreased with unbalanced ANS by short-term stress. Based on the results, the effect of short-term stress should be recognized for the cognitive rehabilitation training.

• 가정과삶의질연구
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• 제27권2호
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• pp.99-109
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• 2009

The purpose of this study was to investigate the effect of the stress and the school adjustment on the ego-resiliency of juvenile. The sample size of this study is 283, which makes it possible to do statistical inferences. As statistical methods, multiple regression analysis and hierarchical regression analysis with SPSS 10.0 is used. The results were as follows: First, friends part, among the four sub-factors of stress, affect negatively ego-resiliency. Second, interest about school life, among the three sub-factors of school adjustment, affect positively ego-resiliency. Third, observation of school norm, among the three sub-factors of school adjustment, affect negatively ego-resiliency. Based of these results, this study suggested that how to elevate ego-resiliency of juvenile delinquencies.

• Structural Engineering and Mechanics
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• 제5권3호
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• pp.239-256
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• 1997

The companion paper presents a new three-parameter model for the uniaxial rate-sensitive material response, which is based on a bilinear static stress-strain relationship with kinematic strain-hardening. This paper extends the proposed model to trilinear static stress-strain relationships for steel and concrete, and discusses the implementation of the new models within an incremental-iterative solution procedure. For steel, the three-parameter rate-function is employed with a trilinear static stress-strain relationship, which allows the utilisation of different levels of rate-sensitivity for the plastic plateau and strain-hardening ranges. For concrete, on the other hand, two trilinear stress-strain relationships are used for tension and compression, where rate-sensitivity is accounted for in the strain-softening range. Both models have been implemented within the nonlinear analysis program ADAPTIC, which is used herein to provide verification for the models, and to demonstrate their applicability to the rate-sensitive analysis of steel and reinforced concrete structures.

• 한국응용과학기술학회지
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• 제37권4호
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• pp.969-985
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• 2020

본 연구는 2018년 10월 29일부터 11월 1일까지 G시의 간호대학 3학년 139명을 대상으로 간호대학생의 성격유형, 학업 스트레스 및 스트레스 대처방식이 대학생활 적응에 미치는 영향요인을 파악하기 위하여 실시하였다. 연구결과, 대학생활 적응은 성별(t=-3.55, p=.001), 전공만족도(F=9.38, p<.001), 대인관계 만족도(F=12.24, p<.001), MBTI 선호유형 중 삶의 양식(JP)과 유의한 차이가 있었다(t=2.54, p=.012). 대학생활 적응은 학업 스트레스(r=-.56, p<.001)와 유의한 음의 상관관계가 있었다. 대학생활 적응에 영향을 미치는 요인으로는 학업 스트레스(β=-.40, p<.001), 대인관계 만족도(β=-.27, p<.001), 성별(β=.22, p=.002)로 나타났으며 설명력은 40.6%였다. 본 연구결과를 토대로 간호대학생의 대학생활 적응을 위해 학업 스트레스 감소 및 대인관계 향상을 위한 성격유형을 고려한 맞춤형 교·내외 프로그램 개발 및 적용이 필요할 것으로 사료된다.

• 융합정보논문지
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• 제12권3호
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• pp.75-84
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• 2022

본 연구의 목적은 간호대학생의 스트레스 대처방식, 감성지능, 감사성향, 의사소통능력 정도를 파악하고 의사소통능력에 영향을 미치는 요인을 확인하고자 함이다. 2021년 11월 09일부터 11월 11일까지 G시 소재 대학에 재학 중인 간호대학생 2학년 159명을 대상으로 하였다. 자료분석은 t-test, ANOVA, Kruskal-Wallis test, Pearson's correlation, 다중회귀분석으로 분석하였다. 의사소통능력은 적극적 스트레스 대처방식, 감성지능, 감사성향과 유의한 순 상관관계를 보였다. 의사소통능력에 대한 영향요인은 감성지능, 감사성향, 적극적 스트레스 대처방식으로 총 변화량의 68%를 설명하였다. 본 연구결과를 토대로 간호대학생의 의사소통능력을 향상시키기 위해 감성지능, 감사성향, 적극적 스트레스 대처방식을 높이기 위한 전략이 필요하다.