• 한국콘텐츠학회논문지
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• 제21권1호
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• pp.352-362
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• 2021

본 연구는 치위생과 학생들의 전공만족도, 우울감, 자아존중감이 대학생활스트레스에 미치는 영향을 파악하기 위해 실시하였다. 경남 소재 J대학에 재학 중인 치위생과 학생 227명을 대상으로 자기기입식 설문지로 설문조사하였다. 수집된 자료는 SPSS WIN 21을 이용하여 기술통계, t-test, ANOVA, 피어슨상관분석, 위계적 회귀분석을 실시하였다. 연구결과, 전공만족도 점수는 3.65±.59점, 우울감 점수는 1.74±.43점, 자아존중감 점수는 3.59±.70점, 대학생활 스트레스 점수는 1.50±.33점이었다. 대학생활 스트레스는 전공만족도, 자아존중감과는 부적상관이 있었으며, 우울감과는 정적상관이 있었다. 대학생활 스트레스에 영향을 미치는 요인은 학년, 소득, 전공만족도, 우울감이었다. 그 결과, 치위생과 학생들의 대학생활 스트레스를 최소화하기 위하여 우울을 예방하고 완화하며, 전공만족도를 높일 수 있는 교육방법과 프로그램 개발이 필요하다고 사료된다.

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2005년도 추계학술대회 및 한일 식물생명공학 심포지엄
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• pp.174-174
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• 2005

• Journal of Microbiology and Biotechnology
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• 제22권10호
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• pp.1432-1440
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• 2012

Weissella confusa 31, an isolate from human feces, possesses desirable properties as a probiotic strain, including bile salt resistance. W. confusa 31 is not inhibited by bile salts up to 0.3% concentration. Proteins affected by bile salts (0.05%) were examined by 2-D gel electrophoresis. Our proteomic analyses revealed that the intensities of 29 spots were changed, where 17 increased (including 2 spots observed only under the bile salts stress conditions) and 12 decreased. Proteins were identified by MALDI-TOF mass spectrometry. Proteins increased in the band intensities included adenylate kinase (12.75-fold increase), Clp-like ATP-dependent protease (11.91-fold), 6-phosphogluconate dehydrogenase (10.35-fold), and HSP 70 (5.07-fold). Some of the increased or decreased proteins are also known to be involved in other types of stress responses.

• 한국산학기술학회논문지
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• 제18권12호
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• pp.189-199
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• 2017

본 연구는 서울에 재학 중인 20대 중국인 유학생 중 미용전공자 283명을 대상으로 중국인 유학생의 생활스트레스 및 문화적응스트레스가 학업만족도에 미치는 영향을 알아보기 위하여 시도되었다. 자료 수집은 2017년 2월부터 3월까지 진행하였다. 자료처리 및 분석은 SPSS ⅴ.22 통계 패기지 프로그램을 활용하여 연구 대상자인 중국인 유학생의 일반적 특성을 알아보기 위해 빈도분석을 실시하였으며, 측정도구의 타당성 검증과 신뢰도를 평가하기 위해 요인분석과 신뢰도분석을 실시하였다, 또한 각 변수 간의 상관관계분석과 회귀분석 방법을 활용하였다. 본 연구의 결과는 다음과 같다. 첫째 중국인 유학생의 생활스트레스 하위요인인 친구관계스트레스, 외모스트레스, 경제적스트레스, 가족관계스트레스, 학업스트레스가 낮을수록 학업만족도는 높아지는 것으로 나타났다. 둘째, 문화적응스트레스의 하위요인 중 인간관계스트레스, 생활문화스트레스를 적게 받을수록 학업만족도는 높아지는 것을 알 수 있었다. 따라서 본 연구의 분석 결과를 통해 중국인 유학생들이 한국 유학생활에서 느끼는 생활스트레스와 문화적응스트레스를 파악하여 문화 생활 교육 측면에서의 적절한 지원체계를 통한 유학 프로그램을 개발하여 제공함으로써 중국인 유학생들의 학업만족도를 높이는데 도움을 줄 수 있는 효율적 방안에 대한 시사점을 도출하고자 한다.

• 설비공학논문집
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• 제17권12호
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• pp.1169-1176
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• 2005

In this paper, thermal reliability of a closed type BLDC (Brushless DC) motor for high speed axial fan was analyzed by the accelerated life test. The closed type BLDC (Model No. MB1-8855-J01) motor was controlled by PCB module, which was composed of various electrical components. The failure of the closed type BLDC motor happened in PCB module due to high temperature. Failure mechanism of the closed type BLDC motor appears to be electrolyte dry out of capacitor. The accelerate life test was performed in temperature stress of $85^{\circ}C\;and\;105^{\circ}C$, respectively The failure data from the accelerated life test were analyzed and the life in each stress level was estimated with 960h and 261 h. At last, both life expression according to operating temperature of PCB module and life of the closed type BLBC motor in normal condition $(50^{\circ}C)$ were suggested.

• Asian Pacific Journal of Cancer Prevention
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• 제15권17호
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• pp.7105-7112
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• 2014

In this study, we investigated oxidative stress and tumor marker levels of polycyclic aromatic hydrocarbons (PAHs) in 136 coke oven workers and in 60 control subjects, and evaluated the correlation between oxidative stress and tumor marker levels. Questionnaires on basic demographic information were also administered. Significant differences in employment time and percentages of alcohol drinkers were observed between the control and exposed groups. PAH exposure was assessed using urinary 1-hydroxy-pyrene (1-OHP) levels and was found to be significantly higher in workers than in the controls. Significant differences (P<0.001) of MDA, GST, LDH, NSE, Cyfra21-1, and of SCC and TNF-a (P<0.0001 and P<0.05, P<0.001, respectively) levels were observed among controls and coke-oven workers, except for bottom coke oven workers. Associations between age and risk of increased TNF-a, smoking and increased GST activities, and drinking with increased MDA concentrations, were marginal (P=0.055, P=0.048, P=0.057, respectively). The association between smoking with MDA (P=0.004), NSE (P=0.005), SCC (P=0.004) andTNF-a (P<0.001), and drinking with TNF-a levels was significant (P=0.012). In addition, a significant positive correlation between oxidative stress and tumor markers was found in the present study. These results suggest that a synergistic increase of oxidative stress and tumor markers induced by PAHs may play a role in toxic responses for PAHs in coke oven workers.

• 동서간호학연구지
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• 제24권1호
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• pp.70-80
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• 2018

Purpose: This study was conducted to explore the mediating effects of internalized stigma on the relationship between hospitalization stress and quality of life among patients with mental illness in closed wards. Methods: A cross-sectional study design was employed. The participants were 141 hospitalized patients with mental illness in the closed wards of K university hospital and Y psychiatric hospital in Korea. Data were collected using self-report questionnaires including hospitalization stress, internalized stigma and quality of life. Data were analyzed using SPSS 21.0 and AMOS 21.0 programs and the mediating effects were examined by the method suggested by Baron and Kenny. Results: There was a significant correlation between hospitalization stress, internalized stigma and quality of life of psychiatric patients. In addition, internalized stigma was found to have a partial mediating effect on the relationship between hospitalization stress and quality of life. Conclusion: The results suggest that the internalized stigma plays an important role in improving the quality of life of the people with mental illness in a closed unit. Therefore, it is necessary to develop a program focusing on internalized stigma for improving the quality of life in hospitalized patients in a closed unit.

• 보건교육건강증진학회지
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• 제30권1호
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• pp.1-11
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• 2013

Objectives: This study aimed to investigate life stressors and mitigating factors affecting suicide ideation amongst university students in Korea. Methods: Study participants were recruited online from one of the universities in Seoul. The total of 794 samples were included in the final dataset. First, correlation analyses were performed among life stressors, depression and mitigating factors. Second, factorial analysis was conducted to explore different dimensions of he life stressors experienced by the university students. Finally, we used logistic regression to find out the relationship between university students' sub-stressors or mitigating factors, and suicide ideation. Results: Three sub-stressors were identified - interpersonal relationship stress, academic stress and economic stress. All of these stressors were significantly associated with suicide ideation. However, none of them significantly predicted suicide ideation controlling for depression. All mitigating factors - health related behaviors, social support and leisure activities - were statistically significant and negatively related to depression, yet only social support had a significantly negative association with suicide ideation. Conclusions: In conclusion, Social support is the most important factor which may affect suicide ideation among university students in Korea.

• 한국정밀공학회지
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• 제13권8호
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• pp.80-87
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• 1996

The present paper will give some results of the fatigue behavior of typical axi-symmetric forward extrusion die. The extrusion process is analyzed by rigid-plastic FEM and the deformation analysis of extrusion die is conducted by elasto-plastic FEM. To approach the crack problem LEFM (Linear Elastic Fracture Mechanics) is introduced. Using special element in order to conside the sigularity of stress/ strain in the vicinity of the crack tip, stress intensity factor and the effective stress intensity factor is calculated. Applying proper fatigue crack propagation criterion such as Paris/Erdogan fatigue law and maximum principal criterion to these data, then, the angle and the direction of fatigue crack propagation is simulated. In result, it is proved that the simulated fatigue crack propagates in the zigzag path along the radial direction and fatigue life of the extrusion die is evaluated by using the computed crack growth rate.

• Journal of Crop Science and Biotechnology
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• 제10권1호
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• pp.39-44
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• 2007

The effect of inabenfide was investigated in rice seedlings subjected to salt stress in relation to changes in chlorophyll fluorescence(${\Delta}F/Fm'$), lipid peroxidation, salicylic acid(SA) content, and catalase(CAT) activity. A reduction in shoot growth of rice seedlings by 120 mM NaCl treatment was significantly alleviated by pretreatment with 30 ${\mu}M$ inabenfide. Sodium ion content was not affected by pretreatment with inabenfide, suggesting that alleviation was not due to a reduction in sodium ion uptake by the rice seedlings. At three days after NaCl treatment, the rice seedlings pretreated with inabenfide showed a higher ${\Delta}F/Fm'$(30%) and lower lipid peroxidation(28%) compared with the rice seedlings treated with NaCl alone. After NaCl treatment, CAT activity in the third leaf of rice seedlings decreased significantly but alleviated by pretreatment with inabenfide. Furthermore, pretreatment with inabenfide also reduced the level of SA which accumulated drastically in the third leaf of rice seedlings within a day after exposure to salt stress. These results suggest that inabenfide prevents SA accumulation in rice seedlings under salt stress which eventually induces the alleviation of salt stress damage.