• 문화기술의 융합
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• 제7권4호
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• pp.591-597
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• 2021

사회적으로 스마트기기를 통한 활용교육이 증가하고, 메타버스 등의 다양한 콘텐츠가 증가하면서 하면서 대학생들의 스마트기기의 과의존 또는 중독, 학습효과의 저하 등에 대한 부작용이 적지 않게 나타나고 있다. 이러한 스마트기기의 과의존은 왜 발생하는지를 파악하기 위해 스트레스, 스트레스 대처를 통한 구조적 관계를 분석하였다. 또한 대학생의 마음챙김 정도에 따라 이러한 구조적 관계에 차이가 나타나는지를 분석하였다. 분석결과를 요약하면 다음과 같다. 첫째, 대학생들이 지각하는 스트레스가 높아질수록 스트레스 대처가 높아지는 것으로 나타났다. 둘째, 적극적 대처가 높아질수록 스마트기기의 과의존이 낮아지고, 소극적 대처가 높아질수록 과의존이 높아지는 것으로 나타났다. 셋째, 마음챙김의 정도가 높을수록 스트레스에 대해 적극적 대처가 이루어지고 이로 인해 과의존은 낮아지며, 마음챙김의 정도가 낮을수록 스트레스에 대해 소극적인 대처가 이루어짐으로 인해 스마트기기의 과의존이 높아지는 것으로 나타났다.

• 한국융합학회논문지
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• 제12권12호
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• pp.583-594
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• 2021

본 연구는 병원간호사의 COVID-19 위험인식, 미디어 의존, 정부신뢰, 회복탄력성과 사회심리적 스트레스가 COVID-19 예방행위에 미치는 영향을 파악하고자 수행된 서술적 조사연구이다. 대학병원 간호사 200명을 대상으로 자료수집을 하였고, 수집된 자료는 SPSS 24.0 프로그램을 활용하여 기술통계, t-test, Pearson's 상관관계 분석, ANOVA, 다중회귀분석으로 분석하였다. 대상자의 평균연령은 29.8세, 병원 경력은 6.6년이었고, COVID-19 예방행위는 4.3점으로 높은 편이었다. COVID-19 예방행위는 COVID-19 위험인식, 회복탄력성 및 미디어 의존과는 정적상관관계 사회심리적 스트레스와 부적상관관계를 보였다. COVID-19 예방행위에 영향을 미치는 요인은 COVID-19 위험인식, 회복탄력성, 사회심리적 스트레스, 미디어 의존이었다. 병원간호사의 COVID-19 예방행위가 지속할 수 있도록 COVID-19 위험인식 및 미디어 의존을 적절히 관리하고, 회복탄력성 강화와 사회심리적 스트레스 경감을 위한 중재프로그램의 개발 및 적용이 필요하다.

• 한국콘텐츠학회논문지
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• 제17권6호
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• pp.132-141
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• 2017

본 연구는 교대근무자를 대상으로 니코틴 의존도에 영향을 미치는 요인을 분석하고자 실시하였다. 연구 대상은 G광역시와 J도에 소재한 제조업 2곳에 근무하는 교대 근무자 중 흡연자 154명을 대상으로 설문조사를 실시하였다. 대상자의 니코틴의존도는 중등도 의존이 23.4%, 중증 의존이 14.3%였다. 니코틴 의존도는 성별, 질병유무, 건강상태에 따라 유의한 차이를 보였으며, 니코틴 의존도는 직무스트레스와 유의한 양의 상관관계가 있었다. 니코틴의존도에 영향을 미친 변인을 회귀분석으로 실시한 결과 직무스트레스, 성별, 질병유무가 유의한 것으로 나타났고 43.9%의 설명력을 보였다. 따라서 이들 변인들을 고려해서 교대근무자들을 대상으로 금연프로그램을 개발하는 것이 필요하다.

• JSTS:Journal of Semiconductor Technology and Science
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• 제14권2호
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• pp.146-152
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• 2014

The temperature dependence of strain-enhanced electron mobility in nMOSFETs is investigated by using a self-consistent Schr$\ddot{o}$dinger-Poisson solver. The calculated results suggest that vertical compressive stress is more efficient to maintain the strain-enhanced electron mobility than longitudinal tensile stress in high temperature condition.

• Computers and Concrete
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• 제2권4호
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• pp.309-324
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• 2005

The moment-curvature relationship of reinforced concrete beams made of normal- and high-strength concrete experiencing complex load history is studied using a numerical method that employs the actual stress-strain curves of the constitutive materials and takes into account the stress-path dependence of the concrete and steel reinforcement. The load history considered includes loading, unloading and reloading. From the results obtained, it is found that the complete moment-curvature relationship, which is also path-dependent, is similar to the material stress-strain relationship with stress-path dependence. However, the unloading part of the moment-curvature relationship of the beam section is elastic but not perfectly linear, although the unloading of both concrete and steel is assumed to be linearly elastic. It is also observed that when unloading happens, the variation of neutral axis depth has different trends for under- and over-reinforced sections. Moreover, even when the section is fully unloaded, there are still residual curvature and stress in the section in some circumstances. Various issues related to the post-peak behavior of reinforced concrete beams are also discussed.

• 한국안전학회지
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• 제3권2호
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• pp.35-48
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• 1988

Modern technological progress demands the use of materials at high temperature and high pressure. One of the most critical factors in considering such applications - perhaps the most critical one - is creep behavior. In this study the stress exponents n were determined during creep over the temperature range of $90^{\circ}C\;to\;500^{\circ}C$ (0.4 - 0.85 Tm) and stress range of 0.64 kgt/$mm^2$ in order to investigate the creep hehavior. The stress dependence of rapture time (n') were determined over the temperature range of $200^{\circ}C\;to\;240^{\circ}C$ and stress range of 8.13 kgt/$mm^2$ to 9.55 kgt/$mm^2$ in order to investigate to creep rupture property. And the stress transient dip tests were also carried out for the internal stress ${\sigma}i$ over the temperature range of $90^{\circ}C\;to\;500^{\circ}C$ and stress range of 0.64kgt/$mm^2$ to 17.2 kgt/$mm^2$. The creep tests for constant temperature and stress transient dip tests were conducted in air with Al 7075 alloy under constant tensile load. At around the temperature range $200^[\circ}C\;-\;230^{\circ}C$ and the stress level 8.13 - 9.55 (kgt/$mm^2$), the temperature range $280^{\circ}C\;-\;310^{\circ}C$ and the stress level 1.85 - 2.55 (kgt/$mm^2$), the temperature range $380^{\circ}C\;-\;410^{\circ}C$ and the stress 1.53 - 0.91 (kgt/$mm^2$), the stress exponent in had the value of 6.2 - 6.65 but at around the temperature range $90^{\circ}C\;-\;120^{\circ}C$ and the stress level 10 - 17.2(kgt/$mm^2$), the value of 1.3, and at around the temperature range $470^{\circ}C\;-\;500^{\circ}C$, the stress level 0.62 - 1.02 (kgt/$mm^2$) the value of 1-1. Besides these results, at around the temperature $200^{\circ}C\;-\;240^{\circ}C$ the stress dependence of rupture time (n') had the value of 6.3. Finally, it was found that the value n calculated by considering the applied stress dependence of the internal stress were in good agreement with those obtained for the creep test. Then, it was concluded that the change in n was mainly attributed to the difference of the applied stress dependence of the internal stress and the ratio of the internal stress to the applied stress, and the creep rupture life may be represented as.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2000년도 춘계학술대회논문집
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• pp.187-191
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• 2000

High temperature creep behaviour of Al-5 wt% Mg alloy reinforced with 7.5% BN flakes was studied. The composite specimens showed two main creep characteristics : (1) the value of the apparent stress exponent of the composite was high and varied with applied stress (2) the apparent activation energy for creep was much larger than that for self-diffusion in aluminum The true stress exponent of the composite was set equal to 5. Temperature dependence of the threshold stress of the composite was very strong. Which could not be rationalized by allowing for the temperature dependence of the elastic modulus change. AIN particles which were incorporated into the Al matrix during fabrication of the composite by the PRIMEXTM method were found to be effective barriers to dislocation motion and to give rise the threshold stress during creep of the composite

• 웰빙융합연구
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• 제6권4호
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• pp.33-39
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• 2023

Purpose: The purpose of this study is that the college age is an important transition period from youth to adulthood. Nursing students are unfamiliar with their field of study and need to adapt to a large amount of academic and practical training, so that they can have a better college life. An attempt was made to determine the effect of exam anxiety, academic stress, and alcohol dependence on the academic achievement of nursing students. Research design, data, and methodology: The subjects of the study were 130 students from all grades who agreed to participate in the study after expressing convenience among students attending the Department of Nursing at a university in Gyeongnam. The data collection period was from August 15 to September 15, 2023. It was about a month. The data investigation was conducted through a self-report survey. Results: Results showed that significant variables included exam anxiety, academic stress, alcohol dependency, parent relationships, peer relationships, and major satisfaction, explaining a total variance of 31.9%. Among these, the most influential factor was academic stress (β=-.352). Conclusions: This study identify factors influencing the academic achievement of nursing college students and hopes to contribute to formulating strategies for their growth and competence development.

• 한국농촌간호학회지
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• 제9권1호
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• pp.33-45
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• 2014

Purpose: This study was done to identify attitudes to smoking, beliefs about smoking and factors influencing nicotine dependence in woman smokers. Methods: Data was collected from 131 women smokers, who visited a public health center between January and July. 2012. Collected data were analyzed using the SPSS 18.0 program. Results: Mean score for attitude to smoking was $23.7{\pm}3.2$, beliefs about smoking, $18.6{\pm}2.9$, and nicotine dependence, $4.3{\pm}2.1$. Attitude to smoking of the woman smokers was significantly different according to marital status, beliefs about smoking were significantly different according to marital status and being employed. Nicotine dependence was significantly different according to frequency of alcohol consumption, stress, number of cigarettes smoked. There was a correlation between attitude to smoking and beliefs about smoking. Age when starting to smoke, number of cigarettes, and length of time one has smoked accounted for 31.0% of nicotine dependence. Conclusion: The results indicate that increasing knowledge and improving attitudes toward smoking as well as training on stress management and exercise are needed. Also, a distinct mediation should be developed for women smokers. Especially, in-depth research is needed to identify psycho-social behavior-related variables for the health promotion of young women smokers.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 추계학술대회
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• pp.268-273
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• 2004

Deformation of single crystals was studied using finite element analysis to investigate the orientation dependence of plastic deformation observed in NiAl single crystals. Investigation of mechanical properties of single crystals is closely related with the understanding of deformation processes in single crystals. Orientation dependence of material behavior in NiAl single crystals was studied by rotating loading directions from 'hard' orientation. The maximum nominal compressed stress in NiAl single crystals was ranged in a quite wide scope depending on the misalignment from 'hard' orientation. As the compressed axis set closer to 'hard' orientation, the maximum nominal compressed stress rapidly increased and made <100> slips difficult to activate. Therefore, non-<100> slips will be activated instead of <100> slips for 'hard' orientation.