• 한국산업융합학회 논문집
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• 제21권2호
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• pp.79-86
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• 2018

The purpose of this study is to compare life stress between primigravida and multigravida in advanced maternal age. A cross-sectional study was performed for 133 pregnancy women (primigravida group 53, multigravida group 80). The all women were old age (${\geq}35years$) and pregnant. We used the questionnaire to self-report general characteristics, obstetric characteristics and life stress. The average of participants age was 36.15 years old, primigravida was 36.08 and multigravida was 36.19. The mean of total life stress score was 2.68 and the total life score for pregnant women of lower education level was higher. The marital relationship of primigravida was lower than multigravida(mean, .06 vs. .26; p=.021). As our study shows that stress of marital relationship is higher in the multigravida than primigravida, the life stress care for advanced maternal age is important.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2003년도 봄 학술발표회 논문집
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• pp.53-58
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• 2003

Many researchers have rigorously studied the nonlinear behavior of stress-strain relationship of concrete using mathematical curves. Most of model equations for stress-strain relationship, however, have been focused on old age concrete, and were not able to adequately represent the behavior of concrete at an early age. A wide understanding on the behavior of concrete from early age to old age is very important in evaluating the durability and service life of concrete structures. In previous study by authors of this paper, a stress-strain model equation for low- and medium-strength concretes was suggested. In this paper, to extend the application region of compressive stress-strain curve to high-strength concrete, an analytical research was performed. An analytical expression of stress-strain curve with strength and age was developed using regression analyses on the experimental results. For the verification of the proposed model equation, it was compared to the experimental data. The result showed that the proposed model equation was not only compatible with the experimental data quite satisfactorily but also describing well the effect of strength and age on stress-strain curve.

• 한국구조물진단유지관리공학회 논문집
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• 제6권1호
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• pp.103-109
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• 2002

Reinforced concrete structure resist to external load caused by integration of steel bar and concrete and this integration is obtained from bond stress between steel bar and concrete. Researches of bond stress between steel bar and concrete have been performed by many researcher, but existent researches of bond stress are concerned with compression strength of well cured concrete and insufficient study of bond stress according to early material. The secure regular strength of concrete in early age is caused by rapid velocity of early hardening process, but questionable bond stress in early age is proportion to strength of that. So this study performed experiments to compare bond stress according to material age and compression strength. The result is showed that bonding strength in early material age compare the ratio of concrete compression strength with the ratio of maximum bond stress the later inferior on the former.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2011년도 추계학술대회
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• pp.123-133
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• 2011

This paper reviewed the relationship between job stress and human error, and the moderating effect of age and maintenance type on the relationship between job stress and human error in maintenance personnel. Based on the responses from 450 maintenance personnels, the results of multiple regression analysis showed that physiological and psychological stress responses have positively related with human error. In moderating effect test, age appeared to impact on the relationship between physiological/behavioral stress and human error.

• 대한안전경영과학회지
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• 제13권1호
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• pp.75-80
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• 2011

This paper reviewed the relationship between superior leadership and job stress responses, and the moderating effect of age in maintenance area of air force. Based on the responses from 450 air force maintenance persons, the results of multiple regression analysis showed that transactional leadership has negative relationship with physiological stress response, charisma has negative relationship with psychological stress, and individual consideration has negative relationship with behavioral stress. In moderating effects, age has negative effect on the relationship between transactional leadership and physiological stress response, and age has positive effect on the relationship between charisma and psychological stress response.

• 한국학교보건학회지
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• 제31권1호
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• pp.10-17
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• 2018

Purpose: The purpose of this study was to examine the health behaviors and health status of adolescents in multicultural families according to gender. Methods: The study used raw data of the Korean Youth Risk Behavior Web-Based Survey performed in 2016. The 12th survey was conducted on 67,983 adolescents in 400 middle schools and 400 high schools. Among them, 759 adolescents were included in this study. Their data were analyzed using descriptive statistics, $x^2$-test, and Pearson's correlation. Results: There were significant differences in economic status, smoking experience, age of drinking onset, vigorous physical activity, soft drink consumption, toothbrushing after lunch, handwashing with soap before eating at school and eating at home and after coming home, BMI, subjective health status, stress, depression, and allergic rhinitis according to gender in multicultural adolescents. For boys, significant positive correlations were found between age and the age of drinking onset, between academic achievement and economic status, and between the age of smoking initiation and the age of drinking onset. However, there were significant negative correlations between economic status and stress and between subjective health status and stress. For girls, age had positive correlations with academic achievement, the age of drinking onset, BMI, and stress and economic status had positive correlations with academic achievement, the age of smoking initiation, and subjective health status. Also, the age of smoking initiation had positive correlations with the age of drinking onset and BMI. Lastly, there were negative correlations between age and economic status, between age and subjective health status, academic achievement and the age of smoking initiation, economic status and stress, and subjective health status and stress. Conclusion: The results of this study are expected to be useful as basic data for planning health interventions for boys and girls in multicultural families.

• 대한가정학회지
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• 제32권4호
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• pp.57-71
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• 1994

The purpose of this research was to study the variables related to the stress and to provide the way of establishing better relationship between aged parents and adult offsprings and the way of effective care-giving. In order to achieve this purpose a survey was conducted by interview using questionaire. The collected data were analyzed by using frequency percentage mean standard deviation factor analysis Pearson's correlation analysis, ANOVA, and stepwise regression analysis. The results of this research were as follows: First The total points of daughter-in-laws' caregicing stress was 38.5 and daughter's caregiving stress was 27.3. Second There were meaningful differences according to living arrangement daughters-in-law age, old mothers' health status. And there were significant. interaction effects among variables of living arrangement and daughters-in-law' age, living arrangement and birth order birth order and old mothers' health status. living arrangement and daughters-in-law' age and old mothers' health status. Third There were meaningful differences according to living arrangement daughter's age. And there were significant interaction effects among variables of living arrangement and daughter's age, daughter's age and birth order, living arrangement and daughter's age and old mothers' health status, living arrangement and birth order and old mothers' health status. Fourth Among daughters-in-law' variables living arrangement age, old mothers' health status have influence on the care-giving stress. Among daughter's variables living arrangement, age, birth order have influence on the care-giving stress.

• Journal of Preventive Medicine and Public Health
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• 제28권1호
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• pp.123-139
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• 1995

This study investigated the stress of community residents in Kwang-Ju and Chonnam areas by using the General Health questionnaire(GHQ-60) as a instrument of stress measurement. The number of subjects were 445 residents who lived in three areas(large city, middle city, and rural area) and they were individually interviewed in March, 1994. The results of study showed that the degrees of stress measured by GHQ-60 were statistically significant in the residents' area, age, sex variables: (a) the residents in middle city among three areas had the highest level of stress; (b) the residents who were more than 60 in age had the highest level of stress: (c) the female residents had more stress than male residents, (d) particularly, the residents who were more than 60 years old in the middle city had the highest level of stress. Further, the results of factor analysis showed that there were three factors of social dysfunction, depression and anxiety and psychosomatic symptom. The social dysfunction factor was statistically significant in both age and resident area variables. The depression and anxiety factor was statistically significant in the residents' area, age, sex variables. The psychosomatic symptom factor was statistically significant in both age and sex variables. The study suggested that they should give a special attention to solve the old people's stress because stress was closely related to residents' age.

• 한국컴퓨터정보학회논문지
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• 제27권6호
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• pp.109-116
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• 2022

본 연구는 스트레스와 생리 변인(면역, 염증)을 검증하기 이전, 스트레스 대처와 대처방법을 연령대별 우울, 불안 증세를 분석하여 기초 자료 제공을 위한 pilot test를 실시하였다. 비대면 방법으로 BDI 및 STAI를 연령대별(20대~70대) 비대면조사와 대면조사를 병행, 추적조사로 실시하였다. 20대부터 60대에서 대처방법에 따라 스트레스 해소 후 유의한 저하를 보였고, 불안은 모든 연령대에서 스트레스 해소 후 유의한 저하를 보였으며, 50대는 운동에 의한 스트레스 대처가 스트레스 해소 후 제일 낮게 나타났다. 본 연구의 결과를 바탕으로 심리 변인에 따른 기초 연구를 통해 실제 스트레스 대처방법에 따른 생리적 변인을 추가 검증하여 높은 스트레스 수준을 보이는 대상을 모집단으로 장기간의 운동 처치를 통해 운동요법에 의해서 우울 및 불안증세 개선과 면역, 염증 반응과의 상관관계 등을 연령대별, 대상별 적합한 스트레스 대처방법을 추가적으로 검증해야 할 것이다.

• 콘크리트학회논문집
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• 제13권5호
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• pp.447-456
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• 2001

그 동안 많은 연구자들은 콘크리트의 응력-변형률 관계의 비선형 거동을 적절한 수식으로 나타내기 위해 많은 노력을 해 왔다. 그러나 이 응력-변형률 관계에 대한 대부분의 경험식은 경화된 콘크리트에 촛점을 맞추어 왔으며, 초기재령에서의 콘크리트의 거동을 잘 나타내지 못하였다. 여기서 초기재령에서 경화시까지 걸친 전 콘크리트의 재령에 대한 폭 넓은 이해는 콘크리트구조물의 내구성과 잔존수명을 평가하는데 있어서 매우 중요하다. 본 논문에서는 5가지의 강도수준과 12시간에서 28일까지의 재령에 대하여 응력-변형률 관계를 검토하였으며, 20$\pm$3$^{\circ}C$ 에서 수중양생된 ø100$\times$200mm의 원주공시체에 대하여 1축압축강도실험을 수행했다. 실험결과에 대한 회귀분석을 수행하여 강도와 재령에 따른 응력-변형률 관계의 모델식을 제시하였으며, 제시된 모델식의 검증을 위하여 실험결과와 기존의 실험결과와 모델식에 대한 해석적 검토도 수행하였다. 해석결과, 제시된 모델식이 실험결과와 잘 맞으며 응력-변형률 관계에 강도와 재령이 미치는 영향을 잘 나타내고 있음을 알 수 있었다.