• Journal of Korean Biological Nursing Science
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• 제18권1호
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• pp.1-8
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• 2016

Purpose: The purpose of this study was to explore the levels of stress, self-efficacy for smoking cessation, smoking temptation, and nicotine dependency, and to identify factors influencing nicotine dependency among male college students who smoke. Methods: In this study, a cross-sectional survey design was adopted for 283 male college students who smoke in D city, Korea. Data was analyzed for descriptive statistics, Pearson's correlation, and multiple regression using the SPSS 20.0 program. Results: The mean score of stress was $27.00{\pm}6.28$, self-efficacy for smoking cessation was $25.61{\pm}6.71$, smoking temptation was $53.87{\pm}11.02$, and nicotine dependency was $3.63{\pm}1.96$. There was a significant positive correlation between stress and nicotine dependency (r=.58, p<.001) and between smoking temptation and nicotine dependency (r=.59, p<.001). There was a significant negative correlation between self-efficacy for smoking cessation and nicotine dependency (r=-.59, p<.001). The significant factors influencing nicotine dependency were stress (${\beta}=.357$, p<.001), self-efficacy for smoking cessation (${\beta}=.359$, p<.001), and smoking temptation (${\beta}=.297$, p<.001). This model explained 60.3% of variance in nicotine dependency (F=105.59, p<.001). Conclusion: The results suggest that an intervention program is needed to reduce the perception of stress and smoking temptation, and to increase the ability of self-efficacy for smoking cessation among male college students who smoke with the intention to quit smoking.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 춘계 학술발표회 초청강연 및 논문집
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• pp.644-655
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• 2008

Conventional hyperbolic model does not satisfactorily predict the overall stress-strain behaviors of various geomaterials. Tatsuoka and Shibuya(1992) suggest the generalized hyperbolic equation(GHE) considering strain dependency and calculated performance is in good agreement with precise triaxial compression test results of stress-strain relations over wide range of strains before peak stress condition in some cases, but GHE model also does not satisfactorily predict stress-strain relations as strain goes on state of peak stress in most cases. For improve a weak point of the GHE, in this study, modified form of generalized hyperbolic equation (MGHE model) is proposed which can predict highly nonlinear stress-strain behavior for various geomaterials from small strain to peak stress condition.

• 한국노년학
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• 제29권3호
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• pp.1183-1196
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• 2009

본 연구는 장기요양보호 노인특성 및 부양자특성과 부양스트레스의 전반적 경향을 살펴보고, 부양자의 스트레스에 대한 노인 및 부양자특성의 상대적 영향력을 알아보기 위해 실시되었다. 이를 위해 부산, 대구, 경북지역에 거주하는 장기요양보호 3등급 노인의 부양자 105명을 임의 표집하여 질문지법을 사용하여 자료를 수집하였다. 연구결과 부양자의 시간의존 스트레스는 노인의 의존도와 부양자의 건강이 그리고 자기발전스트레스는 노인과 부양자의 관계의 질, 노인의 의존도, 부양자연령, 그리고 부양자건강 순으로 영향을 받는 것으로 나타났다. 또한 신체적 스트레스는 부양자건강과 노인의 의존도 순으로, 그리고 사회적 스트레스는 부양자건강, 관계의 질, 그리고 노인의 의존도 순으로, 마지막으로 정서적 스트레스는 관계의 질에 유의한 영향을 받는 것으로 나타났다. 본 연구결과를 기초로 장기요양보호노인의 부양자 스트레스 감소를 위한 실천적 함의가 논의되었다.

• 한국신뢰성학회지:신뢰성응용연구
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• 제11권4호
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• pp.319-330
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• 2011

We consider the stress-strength model in which a unit of strength $T_2$ is subjected to environmental stress $T_1$. An important measure considered in stress-strength model is the reliability parameter R=P($T_2$ > $T_1$). The greater the value of R is, the more reliable is the unit to perform its specified task. In this article, we consider the situations in which $T_1$ and $T_2$ are both independent and dependent, and have certain bivariate distributions as their joint distributions. To study the effect of dependency on R, we investigate several bivariate distributions of $T_1$ and $T_2$ and compare the values of R for these distributions. Numerical comparisons are presented depending on the parameter values as well.

• 한국정밀공학회지
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• 제13권4호
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• pp.53-60
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• 1996

In the conventional linear elasticity, sound speed is determined by only elastic modulus and density of the medium. In actual, however, sound speed depends on the stress and this dependency becomes nonlinear as the stress increases. These phenomena can be introducing nonlinear elastic modulus. In this paper, relationships between nonlinear elastic modulus up to 4th order and the internal status of materials are discussed through computer simulations and experiments. For the measurement of sound speed, a new type of measurement system using ultrasonic wave is proposed on the basis of ultrasonic pulse echo method which has been generally used in nondestructive ultrasonic test equipment. In order to confirm the stress dependency of sound speed, several experiments are carried out for alumina specimen.

• 근관절건강학회지
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• 제20권2호
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• pp.81-90
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• 2013

Purpose: The purpose of this study was to identify factors contributing to health-related quality of life in patients under rehabilitation after stroke. Methods: A descriptive correlational study design was used. Ninety-two stroke patients under rehabilitation from a university hospital were included. Data were collected on March and April, 2013 using structured questionnaires. Hierarchial multiple regression analysis was used to identify factors influencing health-related quality of life. Results: There were significant differences in health-related quality of life according to type of impairment. The health-related quality of life had significant correlations with age, functional dependency, and stress. Factors influencing health-related quality of life for stroke patients under rehabilitation were stress, functional dependency, type of impairment, and age, which explained about 34.5% of total variance. Conclusion: To promote health-related quality of life for stroke patients under rehabilitation, stress and functional dependency should be managed in this population, especially for older adults. Also these results can be utilized in the development of program for helping rehabilitation of stroke patients. The effect of depression and anxiety on health-related quality of life should also be addressed in future research.

• 한국산학기술학회논문지
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• 제19권1호
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• pp.208-217
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• 2018

본 연구는 공분산구조분석을 이용하여 여자고등학생의 학업스트레스, 불안, 대인의존행동특성 및 절망감이 우울에 미치는 영향을 파악하고자 시도하였다. 조사대상은 C시에 소재하고 있는 여자고등학교 학생 684명으로 하였으며, 자료 수집은 2016년 11월 1일부터 12월 31일까지의 기간 동안에 구조화된 무기명 자기기입식 설문지를 이용한 설문조사에 의하였다. 자료의 분석은 SPSSWIN(ver 21.0)프로그램을 사용하여 관련변수들에 대한 우울수준의 평균치 비교 및 Pearson상관분석에 의한 상관계수를 구하였으며, 우울수준에 영향을 미치는 요인들에 대한 공분산 구조분석을 실시하였다. 연구결과, 조사대상자의 우울수준은 학업스트레스, 불안, 대인의존행동특성 및 절망감이 높을수록 유의하게 높았다. 상관관계 분석에서 우울수준은 학업스트레스, 불안, 대인의존행동특성 및 절망감과 유의한 양의 상관관계를 보였다. 공분산 구조분석 결과, 우울수준에 가장 큰 영향을 미친 요인은 불안이었고, 그 다음으로 학업스트레스, 대인의존행동특성의 순이었다. 위와 같은 결과는 여자고등학생의 우울수준은 학업스트레스, 불안, 대인의존행동특성, 절망감과의 인과관계가 성립됨을 시사한다. 따라서 여자고등학생의 우울수준을 감소시키기 위한 우울 중재 프로그램개발에 학업스트레스, 불안 및 대인의존행동특성을 낮추기 위한 방안 등이 포함되어야 할 필요성이 있다고 생각된다.

• 정신신체의학
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• 제4권2호
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• pp.182-197
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• 1996

For the purpose of examining the relationship between smoking, perceived stress and vulnerability factors, and furthermore suggesting interventions to reduce excessive smoking and prevent nicotine dependency effectively, the questionnaires of perceived stress(stressful experiences), ways of stress coping(passive and active copings), smoking motives, social influence, age, amounts of smoking, and nicotine dependency were administered to smokers among medical students in Chosun university(n=186). 1) As a result of classifying smokers by the types of smoking, the most was a type of smokers to reduce negative emotions and the next in order were addictive smokers, smoker for stimulation, smoker for pleasure, etc. 2) The effects of motive, age, and active coping style were significant, but the effects of perceived stress, passive coping style, and social influence were not significant in average amount of daily smoking. 3) The effects of motive, social influence, and age were significant, but the effects of perceived stress, passive and active coping styles were not significant in the degree of nicotine dependency. To summarize, it is concluded that there were a lot of people who smoke to solve negative emotions, but the direct effects of perceived stress and passive coping style on both average amounts of daily smoking and the degree of nicotine dependency were not significant. On the other hand, motive, age, active coping style, and social influence were proved to be more important variables than the others in explaining college students' smoking.

• Journal of Mechanical Science and Technology
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• 제16권9호
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• pp.1084-1092
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• 2002

The frequency dependency of Rayleigh surface wave is investigated indirectly by measuring the angular dependency of the backward radiation of the incident ultrasonic wave in two kinds of degraded specimens by scuffing or corrosion. Then, the frequency dependency is compared with the residual stress distribution or the corrosion-fatigue characteristics for the scuffed or corroded specimens, respectively. The width of the backward radiation profile increases with the increase of the variation in residual stress distribution for the scuffed specimens. In the corroded specimens, the profile width decreases with the increase of the effective aging layer thickness and is inversely proportional to the exponent, m, in the Paris' law that can predict the crack size increase due to fatigue. The result observed in this study demonstrates high potential of backward radiated ultrasound as a tool for nondestructive evaluation of subsurface gradient of material degradation generated by scuffing or corrosion.

• 한국정보시스템학회지:정보시스템연구
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• 제23권3호
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• pp.25-46
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• 2014

As the use of smartphone has rapidly spread into the current society, the mobile instant messenger applications such as Kakaotalk, Tiktok, and Line have become an indispensable part of our daily lives. While, the mobile instant messenger has brought us many positive changes, social problems stemming from the dependency on the mobile instant messenger has been occurred. The dependency of the mobile instant messenger can negatively affect daily lives and lead to stress or addiction. Therefore, it is very important to examine how we can prevent such dependency and addiction. In this respect, the purpose of this study is to investigate determinants impacting on the mobile instant messenger dependency, barrier of living, and intention to digital break. The statistical analysis of survey results shows that enjoyment, identity, relationship commitment, critical mass and ease of use are significantly related to mobile instant messenger dependency, while media richness is not significantly related. Mobile instant messenger dependency have a positive effect on barrier of living, which then has a positive effect on digital break. Lastly, the moderating effect of perceived risk is significant. This research suggests theoretical and business implications to prevent mobile instant messenger dependency.