• Structural Engineering and Mechanics
• /
• 제19권3호
• /
• pp.347-359
• /
• 2005

This paper attempts to develop the analytical model of estimating the fatigue damage using a linear elastic fracture mechanics method. The stress history on a welding member, when a truck passed over a bridge, was defined as a block loading and the crack closure theory was used. These theories explain the influence of a load on a structure. This study undertook an analysis of the stress range frequency considering both dead load stress and crack opening stress. A probability method applied to stress range frequency distribution and the probability distribution parameters of it was obtained by Maximum likelihood Method and Determinant. Monte Carlo Simulation which generates a probability variants (stress range) output failure block loadings. The probability distribution of failure block loadings was acquired by Maximum likelihood Method and Determinant. This can calculate the fatigue reliability preventing the fatigue failure of a welding member. The failure block loading divided by the average daily truck traffic is a predictive remaining life by a day. Fatigue reliability analysis was carried out for the welding member of the bottom flange of a cross beam and the vertical stiffener of a steel box bridge by the proposed model. Results showed that the primary factor effecting failure time was crack opening stress. It was important to decide the crack opening stress for using the proposed model. Also according to the 50% reliability and 90%, 99.9% failure times were indicated.

• 한국콘텐츠학회논문지
• /
• 제15권9호
• /
• pp.134-145
• /
• 2015

2014년 4월 16일 전남 진도 인근 관매도 해상에서 침몰한 세월호 참사가 발생한 지 1주기가 지났다. 총 304명의 희생자와 실종자를 낳은 세월호 참사는 2010년대 이후 대한민국에서 가장 큰 규모의 참사였다. 그러나 세월호 참사 1주기가 지나도록 유족의 트라우마에 대한 심리적, 커뮤니케이션학적 연구는 전혀 없었다. 본 연구는 국내에서 처음으로 자식을 잃은 부모로서 세월호 참사로 인한 극심한 외상 후 스트레스 장애를 겪고 있는 세월호 유가족의 실태를 조사했다. 연구결과 신체적으로, 심리적으로 세월호 유족의 경우 외상 후 스트레스 장애가 발생하고 있음을 확인할 수 있었고 치료에는 소홀한 것으로 나타났다. 외상 후 스트레스 장애는 일상생활에도 영향을 미쳤다. 세월호 유족은 대인관계, 직장관계, 거주지, 가치관 등 많은 부분에서 일상적인 생활에 문제가 많은 것을 확인할 수 있었다. 본 연구를 통해 참사로 인한 세월호 유족의 외상 후 스트레스 장애가 막대한 것으로 나타난 만큼 학계에서도 더욱 적극적으로 관련된 논의를 함께해 우리 사회에서 방치된 세월호 유가족의 고통을 치료하는데 나서야 할 것이다.

• Nutrition Research and Practice
• /
• 제12권2호
• /
• pp.118-128
• /
• 2018

BACKGROUND/OBJECTIVES: Glutathione s-transferase (GST) is involved in the formation of a multigene family comprising phase II detoxification enzymes, involved in the detoxification of reactive oxygen species. This study evaluated whether daily supplementation with kale juice could modulate levels of plasma antioxidant vitamins and oxidative stress-related parameters. We further examined whether this modulation was affected by combined GSTM1 and T1 polymorphisms. SUBJECTS/METHODS: Totally, 84 subclinical hypertensive patients having systolic blood pressure (BP) over 130 mmHg or diastolic BP over 85 mmHg, received 300 mL of kale juice daily for 6 weeks. Blood samples were drawn before start of study and after completion of 6 weeks. RESULTS: After supplementation, we observed significant decrease in DNA damage and increase in erythrocyte catalase activity in all genotypes. Plasma level of vitamin C was significantly increased in the wild/null and double null genotypes. The plasma levels of ${\beta}-carotene$, erythrocyte glutathione peroxidase activity, and nitric oxide were increased only in the wild/null genotype after kale juice supplementation. CONCLUSIONS: The effect of kale juice was significantly greater in the GSTM1 null genotype and wild/null genotype groups, suggesting possibility of personalized nutritional prescriptions based on personal genetics.

• 한국컴퓨터정보학회논문지
• /
• 제16권2호
• /
• pp.17-23
• /
• 2011

본 연구에서는 일상생활 속에서의 심전도를 측정하여 HRV(Heart Rate Variability)를 모니터링 하며 스트레스를 추정할 수 있는 시스템을 제안한다. 제안된 무선 생체 측정기 모듈은 전처리필터와 BFP사용으로 잡음은 감소 시키면서 신호의 크기는 증가시키기는 회로를 설계하였고, ECG를 측정하여 R-wave를 추출하고 이를 통한 HRV로 인간의 감성 중 스트레스를 평가하는 알고리즘을 개발하였다. 또한 무선 생체 측정기 시스템은 활동 모니터링을 위해 휴대하기 편한 사각형의 작은 사이즈로 구성되며 측정방법이 간단하여 언제든지 측정이 가능하다. 실험을 통해서 취득한 사용자의 HRV 정보는 스트레스 평가 지수 도출 알고리즘을 통한 스트레스를 추정할 수 있으며 스트레스 부하 프로토콜을 수행 한 전후를 비교 분석하여 많은 파라미터에서 유의미한 차이가 나타났다. 본 연구에서 수행된 실험은 일상생활 중에 심장의 전기 활동을 모니터링 할 수 있는무선 생체측정기를 개발하였으며 이를 이용하여 시간영역 분석 및 주파수 영역 분석을 통하여 스트레스 지수를 평가 할 수 있는 알고리즘 시스템은 건강 모니터링 시스템으로 활용도가 높을 것으로 기대된다.

• 디지털융복합연구
• /
• 제16권10호
• /
• pp.545-555
• /
• 2018

본 연구는 참여적 질적 연구방법인 포토보이스 조사방법을 활용하여 대학생들의 스트레스를 탐색하는 것이다. J시에 소재한 대학생을 대상으로 6회기에 걸쳐 교육, 자료수집, 자료 분석 순으로 진행되었다. 분석결과는 1) 스트레스의 의미-내 머리 속의 거미줄, 끝이 없는 통로 손을 가만두지 못하는 불안, 언제 터질지 모르는 시한폭탄 2) 스트레스의 원인-인생은 성적순이 아니잖아요, 경제적 어려움, 취업의 막막함, 시간 관리의 어려움 3)스트레스의 대처전략-편하게 웃을 수 있는 친구, 음식은 넣고 스트레스는 빼고, 일상에서 벗어나자, 긍정적인 마음으로 심신안정 으로 범주화되었다. 분석된 연구결과를 바탕으로 대학생들의 스트레스의 원인과 대처방안을 심층적으로 이해하며, 스트레스에 대한 대학사회의 제언과 한계, 포토보이스 활용 방안의 교육적 시사점을 제시하였다.

• 동의신경정신과학회지
• /
• 제6권1호
• /
• pp.71-84
• /
• 1995

This paper is for studying interrelation between Stress perception, Todai Index(THI) test and coffee. this study was done on 163 college women whose ages were 18 to 33 and who were in University in Wonju. The Stress perception test and THI test shows the following results. 1. The Stress test on the group that drunk coffee and beverage shows high degree of oppression sense about school and daily life. 2.The total THI test on the group that drunk coffee shows high degree of complaint on mouth, evacuation and lie scale, but shows the lowest piont on nervousrness. 3. The D-group womrn who drink a cup of coffee, two or three show the highest complaint on mouth and evacuation. E-group shows the lowest lie scale. 4 The Stress test and health examination on the group that drunk coffee show high degee of stress. And it also shows stimulative relation between the condition of body health and drinking coffee. The above shows that coffee and some beverage can affect on mental and physical health. Especially they are considered as a factor of stimulus on stress response. Through the THI test, the effect on mouth and evacuation, lie scale and nervousness could be obseved. So the drinking coffee and beverage requires circumspection.

• 가족자원경영과 정책
• /
• 제19권1호
• /
• pp.1-21
• /
• 2015

Unlike daily hassles or minor stressors, immigration is an intense life event that may cause excessive stress. In particular, immigrant parents find themselves in a more stressful situation in that they experience stresses caused by immigration and stresses caused by parenting at the same time. The purpose of this study is to develop and validate an Immigrant Parental Stress Inventory (IPSI), that objectively and comprehensively assesses the stress experienced by immigrant parents within the Korean context. Based on the Immigrant Parental Stress Inventory developed within the American context, preliminary items were refined through a literature review and the discussions of experts and immigrant parents and were empirically validated with a sample of 203 immigrant parents residing in Korea. Through exploratory and confirmatory factor analysis, six main factors were identified (Factor1 Difficulties in communication, Factor2 Financial difficulties, Factor3 Difficulties in social adjustment, Factor4 Social discrimination, Factor5 Lack of social resources, Factor6 Difficulties in parenting). The IPSI was shown to be a psychometrically sound instrument that is capable of measuring immigrant parental stress within the Korean context. Social service professionals and researchers studying or working with immigrant families could use the IPSI to examine immigrant parental stress.

• Child Health Nursing Research
• /
• 제14권3호
• /
• pp.315-324
• /
• 2008

Purpose: This study was done to determine the effects of a neurofeedback program on brain function and stress in occupational high school students. Method: A nonequivalent control group, non-synchronized with pre-posttest design was used with 62 students. Data collection was done from July to December, 2007. The neurofeedback training was given for 30 minutes at a time, three times a week for 12 weeks. Brain function was measured by brain waves in the frontal lobes of the students and analyzed by eight brain quotients characterizing patterns of EEG rhythms. The instrument used to measure stress was a scale for stress from regular daily life. Results: After neurofeedback training, the level of brain quotients in students in the experiment group increased(t=2.36, p<.05) and the level of stress decreased(t=-3.59, p<.001). Conclusion: The results of the study suggested that a neurofeedback program is effective for brain function improvement and stress reduction in high school students. Therefore, the conclusion of this study is that neurofeedback programs can be useful to increase brain function and decrease stress in occupational high school students.

• 동아시아식생활학회지
• /
• 제18권5호
• /
• pp.651-661
• /
• 2008

The mother's obesity-related stress and it's association with obesity, food intake, and physical activity in both mothers and their children were determined. Based on self-reports from 470 mothers, obesity stress of mothers were scored by using a five-point Likert scale; only low and high stress scores were used in this study. The perceptions of mothers' weights and their children's weights, mothers' Body Mass Indices (BMI), and preschoolers' Weight-Length Indices (WLI)(%) were also determined. The obesity stress of mothers was significantly associated with the mothers' BMI (high stress: $23.5{\pm}2.4$ vs. low stress: $19.6{\pm}1.7$, p<0.05), but not with their children's obesity. Mothers with a high obesity stress reported a higher percentage of family history of obesity (62.1% vs. 38.3%, p<0.001) than mothers with low obesity stress. Compared to mothers with low obesity stress, mothers with high stress had lower correct-perceptions about their weights (p<0.05) but higher correct-perceptions for their children's weights. Almost 54.5% of mothers with high stress reported watching television 2 or more extra hours per day, compared with 32.2% of mothers with low stress (p<0.05). More children of mothers with high stress had long hours of daily TV viewing than children of mothers with low stress (36.0% vs. 15.3%, $X^2=10.491$, p<0.05). Mothers with high stress reported lower intake of protein-rich foods (p=0.01) and vegetables (p=0.039), but a higher intake of snacks (p=0.009), compared to mothers with low stress. More children of mothers with high stress reported eating high fat snacks or high sugar snacks everyday, but this was not statistically significant. In conclusion, high obesity stress in mothers were greatly associated with their BMI and their inactive life style, including long TV viewing hours per day and unbalanced food intakes, which can lead their children becoming inactive and obese. Special attention is recommended for overstressed mothers and their children, especially those who enjoy long hours of TV viewing.

• 대한간호학회지
• /
• 제24권3호
• /
• pp.448-460
• /
• 1994

This study was conducted to investigate risk factors for senile dementia as well as care givers' stresses and thier needs for nursing care. It was done using a retrospective survey. A convenience sample or In senile dementia patients and l20 nor-mal elders in a rural area was used. The tools used in the study were the MMSE-K(Mini-Mental State Examination-Korea) for dementia screening test and a questionaire developed by the research team. Data were collected through home visits by Com-munity Health Practitioners. Data were analyzed using descriptive statistics, T-test, and Chi-square test. The findings are as follows : 1. There were significant differences in age, marital status, and religions between the two groups. 2. There was a significant difference in smoling behavior between the two groups. 3. There was a significant difference in past his-tory of cancer between groups. 4. There was a significant difference in past and present elderftmily relationship between the two groups. 5. There were significant differences in intellectual activities, assuming major role in family and seeking other's help in daily life troubles between the two groups. 6. There were significant differences in stress factors such as child problem, family conflict, health problem and illegal behavior between the two groups. 7. The major problems out by families in caring for dementia patient were catastrophic reactions, dirtiness, mood change, devouring and tremor. The most serious problems faced by families was dirtiness. with catastrophic reactions, sleep distrubance, changeableness, and a suspcio-usness following. The care givers expressed chronic fatigue, anxiety, tension, depression, disorder in daily life, shamefulness, blame from neighbours and guiltiness. 8. There is need for geriatric hospitals, nursing homes, burden sharing, and counselling or education for family care givers. A replicate study in the urban area is recommended to validate the findings of this study. To explore the impact of stress in life and ‘han’ on senile dementia, a qualitative study is recommended.