• 한국콘텐츠학회논문지
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• 제22권7호
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• pp.276-289
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• 2022

본 연구는 학교생활적응의 측면에 초점을 맞추어 중·고등학생들을 대상으로 여가활동이 학교생활적응에 미치는 영향을 알아보고, 청소년의 여가활동과 학교생활적응의 관계에서 심리적 행복감과 학업스트레스의 매개 효과를 검증하는데 목적이 있다. 서울·경기지역에 소재하는 중·고등학교 재학생을 대상으로 2주간(2021년 11월 1일-11월 15일) 조사하여 실증분석을 실시하였다. 본 연구의 결과는 다음과 같다. 첫째, 청소년의 여가활동은 심리적 행복감에 정(+)의 영향을 미치는 것으로 나타났다. 둘째, 청소년의 여가활동은 학업스트레스에 부(-)의 영향을 미치는 것으로 나타났다. 셋째, 청소년의 여가활동은 학교생활적응에 정(+)의 영향을 미치는 것으로 나타났다. 넷째, 청소년의 심리적 행복감은 학교생활적응에 정(+)의 영향을 미치는 것으로 나타났다. 다섯째, 청소년의 학업스트레스는 학교생활적응에 부(-)의 영향을 미치는 것으로 나타났다. 여섯째, 청소년의 여가활동과 학교생활적응의 관계에서 심리적 행복감과 학업스트레스는 유의한 매개효과가 있는 것으로 나타났다. 본 연구는 청소년이 바람직한 여가활동, 높은 심리적 행복감, 낮은 학업스트레스, 학교생활에의 적응을 갖추는 삶을 살기 위한 방안 마련에 이론적이고 실증적인 자료를 제공하였다는 데 의의가 있다.

• Structural Engineering and Mechanics
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• 제66권2호
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• pp.151-160
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• 2018

With the aim to evaluate the fatigue damage accumulation and predict the residual life of engineering components under variable amplitude loadings, this paper proposed a new strain energy-based damage accumulation model by considering both effects of mean stress and load interaction on fatigue life in a low cycle fatigue (LCF) regime. Moreover, an integrated procedure is elaborated for facilitating its application based on S-N curve and loading conditions. Eight experimental datasets of aluminum alloys and steels are utilized for model validation and comparison. Through comparing experimental results with model predictions by the proposed, Miner's rule, damaged stress model (DSM) and damaged energy model (DEM), results show that the proposed one provides more accurate predictions than others, which can be extended for further application under multi-level stress loadings.

• Journal of Life Science
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• 제12권2호
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• pp.47-52
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• 2002

Saccharomyces cerevisiae KNU5377 (KNU5377) and S. cerevisiae ATCC24858 (ATCC24858) were exposed to $H_2SO_4$ as a stress, which was added at various concentrations to a YPD media. The growth of KNU5377 was reduced to approximately 60% in the YPD media containing 40 nm sulfuric acid when compared to the non-stressed condition. When their growth was monitored during an overnight culture, two strains, KNU5377 and ATCC24858, could not grow when exposed to over 50 mM of sulfuric acid. After a short exposure to this acid for 1 h, KNU5377 exhibited stronger resistance against $H_2SO_4$ than ATCC24858. The neutral trehalase activity of KNU5377 unchanged despite under various concentrations of $H_2SO_4$. In contrast, It at of ATCC24858 was much low at higher $H_2SO_4$concentrations. Trehalose, a non-reducing disaccharide, was maximally accumulated after a short exposure to 60 nm $H_2SO_4$ for KNU5377, but it was reduced under more severe stressful conditions. These results suggest that KNU5377 should modulate the trehalose concentrations under the severe stress condition of high sulfuric acid concentrations. The most highly induced protein in the KNU5377 exposed to sulfuric acid was found to be an approximately 23 kDa protein, which was revealed to be the 605 large subunit ribosomal protein, Ll3 by FASTA search results.

• 한국안전학회지
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• 제31권1호
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• pp.19-24
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• 2016

Rubber parts are widely used in many applications such as dampers, shock absorbers, and seals used in railway and automotive industries. Much research has thus far been conducted on property estimation and life prediction of rubber parts. To predict the service life of rubber parts at room temperature, most prior work adopts the well-known Arrhenius model that needs the accelerated life test in high-temperature conditions. However, they may not reflect the actual conditions of use that rubber parts are usually used under a specific strain condition during long period of time. In this context, we propose a method for the life prediction of rubber parts in actual conditions of use. The proposed method is based on the accelerated life test using stress relaxation during which three relatively high elongation percentages (100%, 200%, and 300%) are applied to the rubber specimens. Rubber specimens were prepared in accordance with KS M 6518 standard and three stress relaxation testers were fabricated for actual experiments. Finally, a inverse power model for life prediction was derived from experimental results. The predicted life was compared with the actual test life for validation.

• 가정과삶의질연구
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• 제32권6호
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• pp.31-45
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• 2014

The purpose of this study are to find out the gender and school level differences in adolescents' depression, and the influences of parent attachment and school stress on adolescents' depression and the effect of ego-resilience relations between parent attachment and depression, and that of school stress and depression. 402 of students(the first and the second graders of middle school and of high school in academic track in D area) completed questionnaire on parent attachment, school stress, ego-resilience, and depression. Descriptive statistic analyses, reliability analyses, Two-way ANOVAs, correlation analyses, and hierarchial multiple regression analyses were conducted through SPSS WIN 20.0. The findings are as follows. 1) There was school level difference, but not gender differences, on adolescents'depression. 2) There was ego-resilience control effect on the relations between parent attachment and adolescents' depression only for middle school students, but not for high school students. 3) There were ego-resilience control effect on the relations between school stress and adolescents' depression for both middle and high school students. The importance of ego-resilience and school levels in understanding adolescents' depression was discussed.

• 한국응용과학기술학회지
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• 제40권3호
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• pp.363-373
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• 2023

본 연구목적은 여고생 164명의 자아통제감, 사회적 지지 및 일상적 스트레스 수준과 그 변인들 간의 관계, 여고생의 일상적 스트레스에 영향을 끼치는 요인을 살펴보는 데 있다. 대상자의 자아통제감은 평균 20.47±3.86점으로, 학교생활 만족 정도에 따라 유의한 차이를 나타냈다. 대상자의 사회적 지지는 평균 105.88±19.63점으로, 학교생활 만족 정도와 부모님의 양육 태도에 따라 유의한 차이를 나타냈다. 대상자의 일상적 스트레스는 평균 58.96±17.33점으로, 교우관계, 학교생활 만족 정도 및 부모님의 양육태도에 따라 유의한 차이를 나타냈다. 대상자의 일상적 스트레스는 자아통제감, 사회적 지지와 각각 통계적으로 유의미한 음의 상관관계를 나타냈으며, 자아통제감은 사회적 지지와 통계적으로 유의한 양적 상관관계를 보였다. 여고생의 회복탄력성에 영향을 주는 요인은 사회적 지지, 자아통제감이었다. 본 연구 결과는 여고생의 정서적, 정신적 건강증진 측면에서 일상적 스트레스를 완화 시키기 위한 프로그램 개발의 필요성을 제시한다.

• 대한지역사회영양학회지
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• 제22권6호
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• pp.475-484
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• 2017

Objectives: The study was conducted to investigate the relationship between several stress measures in everyday life, emotional eating behavior, and dietary pattern (snacks, fatty foods, sweet beverages, fruits and vegetables) in school-aged children. Methods: One hundred and ninety-four students of an elementary school located in Seongnam City participated in the study. The students responded to the survey questionnaire by self-report, which consisted of items regarding general characteristics, height, weight, dietary habits, frequency of consuming healthy (fruits and vegetables) and unhealthy foods (snacks, fatty foods, and sweet beverages), emotional eating behavior, and daily stress. Correlational analysis was performed to examine the relationship between stress, emotional eating behavior, and dietary pattern, and Poisson and logistic regression analyses were conducted to investigate the effects of stress on dietary pattern. Results: Positive correlations were found between all stress factors and emotional eating behavior and between the friend and personal factor (one of the stress factors) and the consumption of sweet beverages. The frequency of consuming sweet beverages was 2.6 times higher in the high stress group than in the low stress group (95% CI). Conclusions: Children's daily stress was associated with emotional eating behavior and undesirable dietary pattern such as consumption of sweet beverages.

• Mycobiology
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• 제46권2호
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• pp.114-121
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• 2018

Mon1 is a guanine nucleotide exchange factor subunit that activates the Ypt7 Rab GTPase and is essential for vacuole trafficking and autophagy in eukaryotic organisms. Here, we identified and characterized the function of Mon1, an ortholog of Saccharomyces cerevisiae Mon1, in a human fungal pathogen, Cryptococcus neoformans. Mutation in mon1 resulted in hypersensitivity to thermal stress. The mon1 deletion mutant exhibited increased sensitivity to cell wall and endoplasmic reticulum stress. However, the mon1 deletion mutant showed more resistance to the antifungal agent fluconazole. In vivo studies demonstrated that compared to the wild-type strain, the mon1 deletion mutant attenuated virulence in the Galleria mellonella insect model. Moreover, the mon1 deletion mutant was avirulent in the murine inhalation model. These results demonstrate that Mon1 plays a crucial role in stress survival and pathogenicity in C. neoformans.

• 지역사회간호학회지
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• 제33권3호
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• pp.279-289
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• 2022

Purpose: This is a descriptive correlation study to confirm the effect of stress and anxiety caused by COVID-19 on the quality of life of small business owners in an area under environment of COVID-19. Methods: The participants were 150 small business owners in an area. The collected data were analyzed by descriptive statistics, an independent t-test, a one-way ANOVA, Pearson's correlation coefficients, and multiple regression with the SPSS 25.0 Program. Results: The stress of small business owners averaged 3.67±0.65 out of 4 points, anxiety of COVID-19 was 2.65±0.52, and quality of life was 75.61±20.26 out of 130 points. The quality of life showed a significant negative correlation with 'fear of infection' (r=-.42, p<.001), 'difficulties caused by social distancing' (r=-.49, p<.001) in the stress subdomain, and anxiety (r=-.61, p<.001). On the other hand, stress, 'fear of infection' (r=.50, p<.001), 'difficulties caused by social distancing' (r=.60 p<.001), 'anger against others' (r=.35, p<.001) and anxiety showed positive correlation. Factors affecting the quality of life of the subjects were 'fear of infection' in the stress subdomain (β=-.23, p=.003), anxiety (β=-.45, p<.001), and residential area (J zone) (β=-.16, p=.030). These factors explained 47.0% of the variance. Conclusion: In order to enhance the quality of life of small business owners in an area, it is required to reduce stress and anxiety. In addition, it is necessary to prepare an intervention program that can reduce stress and anxiety of small business owners.

• 디지털융복합연구
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• 제11권12호
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• pp.193-199
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• 2013

오늘날 학생들은 미래 사회인으로써의 준비를 위해 개인역량 개발, 학업성적, 대인관계, 취업준비, 영어공부 등으로 스트레스를 받고 있다. 학생들의 스트레스는 마음의 안정을 저해하고, 삶의 만족감을 악화시킨다. 본 연구에서는 대학생들이 느끼는 스트레스가 마음챙김과 삶의 만족감에 미치는 영향 관계를 구조방정식모델을 통해 살펴보았다. 더불어, 학생들의 학년에 따른 스트레스 수준이 삶의 만족감에 미치는 영향을 분석하였다. 본 연구결과는 학생들의 삶의 만족감을 높이기 위한 스트레스 관리와 마음챙김에 도움을 제공해 줄 것이다.