• 가족자원경영과 정책
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• 제23권4호
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• pp.75-95
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• 2019

The purpose of this study was to investigate the effects of relationship stress at work and family relationship stress on working men's depression in order to improve their mental health. Data were collected via questionnaire from 313 white-collar workers living in Seoul, Daejeon and Gwangju. There were significant differences in depression depending on age, spouse, age of child, family size and years of labor. There were positive correlations among depression, relationship stress at work and family relationship stress. The family relationship stress was the most influential factor on depression, followed by relationship stress at work. Family relationship stress had a mediating effect on depression and relationship stress at work. These results showed that employers should manage depression of workers in a family friendly way to reduce the stress in relationship at work and home such as work and family balance policy.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2002년도 가을 학술발표회 논문집
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• pp.795-798
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• 2002

Recently. the properties of early-age concrete are increasingly important because these properties directly influence the behavior of early-age concrete structures including stress and cracking behavior. Nevertheless, the studies on early-age concrete are limited to strength and temperature development. The purpose of present study is to propose a simple and rational method which can predict the stress and strain behavior of young age concrete. A series of test have been done to measure the temperature development, strains and stresses in concrete members. The concept of equivalent age was used to define the degree of hydration and this degree of hydration was used to calculate the strength and elastic modulus. The present study indicates that the calculated stresses correlate fairly well with measured stresses. The consideration of critical degree of hydration in calculating stresses gives more accurate results. The present study provides useful method and data in evaluating early-age behavior of concrete structure.

• 생명과학회지
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• 제9권5호
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• pp.548-555
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• 1999

Long-term effects of Ganoderma lucidum (GL) on memory and oxidative stress of senescence-accelerated mice (SAM) were investigated. Senescence-resistant (R1) and prone (P8) strains of SAM were fed GL diets, premixed with low (20 mg/kg/day, T1) or high (200 mg/kg/day, T2) levels of GL powder for 9 months starting from young (3 months of age) or for 5 months starting from old (7 months of age). After the final feeding at 12 months of age, all animals were subjected to passive avoidance test for the evaluation of memory function. In addition, the changes in hepatic thiobarbituric acid-reactive substance (TBARS) and glutathione were analyzed. SAMP8 fed GL diets from old age (7 months) exhibited the improvement of memory, although GL rather inhibited the memory function of both SAMR1 and SAMP8 mice fed diets from young (3 months of age). Hepatic TBARS contents were decreased in SAMP8 fed high GL diet for 9 months and in SAMR1 fed low GL diet for 5 months. Hepatic glutathione content was also remarkably increased in SAMR1 following both feeding periods, and less extent in SAMP8 fed diet for 5 months of age. Taken together, it is proposed that GL extracts may play an anti-aging role through antioxidant action, and thereby may improve the senescence-related memory dysfunction.

• Asian-Australasian Journal of Animal Sciences
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• 제19권5호
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• pp.734-738
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• 2006

The present study was conducted to determine the effect of cold stress on broiler performance and ascites susceptibility. Male chicks were obtained from a commercial strain of broiler breeders. The trial was divided into two treatments (control and cold stress groups). Ascites was induced in broiler chickens in the trial by exposing the chickens to low temperature (Ta) and by supplying a pelleted diet. The two experimental treatments consisted of: 1) Control group, $33.3^{\circ}C$ the $1^{st}$ wk, $30.2^{\circ}C$ the $2^{nd}$ wk, and $27.5^{\circ}C$ the $3^{rd}$ wk. 2) Cold stress group, $29.0^{\circ}C$ the $1^{st}$ wk, $26.4^{\circ}C$ the $2^{nd}$ wk, and $23.1^{\circ}C$ the $3^{rd}$ wk. From the end of the $3^{rd}$ wk all broilers were reared to 6 wk of age at a constant temperature of $21^{\circ}C$. There was significant difference in live BW during wk 1 to 5. The control group was consistently the heaviest; however, at 6 wk of age, both groups weighed the same. Body weight gain up to 3 wk was significantly decreased by cold stress. During wk 3 and 6 the chicks in the cold stress group had greater BW gain compared with the chicks in the control group. There were significant differences in mortality due to ascites between the groups. During wk 3 and 6 the cold stress group exhibited the most ascites mortality (9.52%) when compared with the control group (1.90%). At 5 wk of age cold stress condition caused significant changes in packed cell volume (PCV), hemoglobin (Hb) and red blood cell counts (RBC). Right ventricle weight was significantly heavier in the cold stress group than the control. There were also significant differences in right ventricle/total ventricle (RV/TV) ratios at 5 wk. the right ventricle/total ventricle ratios in the cold stress group was higher (0.25) than the control group (0.20). It was concluded that, fast growth and cold temperatures are the primary triggers for ascites during commercial broiler production.

• The Journal of Korean Physical Therapy
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• 제4권1호
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• pp.69-78
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• 1992

The purpose of this survey is to grasp the special school therapeutic education teachers, stress degrees in the real educational fields, and to campare the different stress degrees by the teaching responsibilities, by set by age, by the careers of special teaching profession, by his or her assiduity by the academic careers and teacher qualification, and by the reasons of stress. To perform this survey, the writer analyzed the answer sheets of the questionnairs returned by 85 special school therapeutic education teachers all over the country. The results of the analysis are as follows: First, the mean value of stress by the whole teachers was shown as endurable, and there was no difference among stress towels by the teaching responsibilities. As for the ratio of teachers confronted with the dangerous level of stress. the teachers taking charge of feebleminded school teachers the highest ratio, and those charging of deaf & dumb school teachers, the lowest. Second, the comparison by age didn't result in any difference, but in the relation of age to the handicap division there appeared meaningful differences. That is in the case of the therapeutic education theachers charging of crippled school, it revealed that the older they were, the more stress they suffered. In the case of the teachers charging of visually deaf & dumb school the tendency was opposite. The comparison by the special teaching profession careers, there showed no difference in the stress degree. The high or low academic careers didn't make any influence on the therapeutic education teachers stress degree. Third, The revealed on the highest stress degress, because reasons of relation the student's parents with students behavior.

• 치위생과학회지
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• 제20권1호
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• pp.59-66
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• 2020

Background: This study aims to analyze the job stress of dental hygienists and the factors affecting somatization and to provide basic data for effectively managing job stress and somatization of dental hygienists. Methods: In this study, the data collected from 208 dental hygienists working in Jeollabuk-do Province were analyzed. Job stress was investigated using a questionnaire with 43 questions. In addition, the degree of somatization was evaluated through a simplified psychotherapy examination (Symptom Check List-90-Revision). Results: Age, employment history, position, average monthly income, night duty execution status, and perceived health status were significantly associated with job stress (p<0.05). The job stress sub-items scores based on general characteristics showed significance in 'workload' for those working a five-day workweek and perceived health status (p<0.05). Age, average monthly income, and perceived health status were noted in 'role conflict as a professional'. In 'lack of expertise and skill', it was noted that age, employment history, position, income, and night clinic were implemented. In 'improper treatment and interpersonal issues', level of education and perceived health status were significant (p<0.05). The higher the job stress, the higher the somatization symptom score (p<0.05), and the higher the job stress component, the higher the somatization symptom score (p<0.01). Conclusion: The job stress of dental hygienists should be reduced, and the symptoms of somatization should be mitigated. To improve the quality of medical services and the work efficiency of dental hygienists, proper treatment and compensation systems should be implemented for them to take pride as professional. Further, programs and regulations on mitigating job stress and somatization symptoms should be developed.

• 정신신체의학
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• 제4권2호
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• pp.182-197
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• 1996

For the purpose of examining the relationship between smoking, perceived stress and vulnerability factors, and furthermore suggesting interventions to reduce excessive smoking and prevent nicotine dependency effectively, the questionnaires of perceived stress(stressful experiences), ways of stress coping(passive and active copings), smoking motives, social influence, age, amounts of smoking, and nicotine dependency were administered to smokers among medical students in Chosun university(n=186). 1) As a result of classifying smokers by the types of smoking, the most was a type of smokers to reduce negative emotions and the next in order were addictive smokers, smoker for stimulation, smoker for pleasure, etc. 2) The effects of motive, age, and active coping style were significant, but the effects of perceived stress, passive coping style, and social influence were not significant in average amount of daily smoking. 3) The effects of motive, social influence, and age were significant, but the effects of perceived stress, passive and active coping styles were not significant in the degree of nicotine dependency. To summarize, it is concluded that there were a lot of people who smoke to solve negative emotions, but the direct effects of perceived stress and passive coping style on both average amounts of daily smoking and the degree of nicotine dependency were not significant. On the other hand, motive, age, active coping style, and social influence were proved to be more important variables than the others in explaining college students' smoking.

• 간호행정학회지
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• 제17권4호
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• pp.508-515
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• 2011

Purpose: The purposes of this study were to understand correlation of parenting stress and turnover intention of nurses, and to provide basic data for effective nursing management. Methods: Subjects included 287 nurses who had children and worked in hospitals. Data were collected through organized questionnaires from September 1st to 30th 2010. Collected data was analyzed with descriptive statistics, t-test, ANOVA, correlation analysis using PASW statistics 18 program. Results: The average score for parenting stress of the participants was 3.12 out of 5. Nurture stress was statistically different depending on age, job position, shift work, night duty and stages of family development. The average score for turnover intention of the participants was 3.34 out of 5. Turnover intention was statistically different depending on age, number of children and stages of family development. As a result of correlation analysis of parenting stress and turnover intention, turnover intention showed positive correlation with daily stress, stress caused from taking parent role and average parenting stress. Conclusion: This study indicates that parenting stress is related with turnover intention, nursing managers should make efforts to decrease parenting stress in order to reduce turnover intention of nurses.

• 한국도로학회논문집
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• 제11권4호
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• pp.87-94
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• 2009

콘크리트 슬래브는 타설 후 온도와 수분 변화를 통해 체적이 변화한다. 수분증발에 의하여 발생한 건조수축은 슬래브의 자중이나 하부층과의 마찰 등에 의하여 구속되어 슬래브 내부에 응력이 유발된다. 선행 연구에 의하면 건조수축에 의하여 발생된 실제 인장응력은 이론적으로 예측된 값보다 작은 것으로 보고되었다. 이는 부분적으로 구속된 슬래브에서 발생하는 초기 재령 콘크리트의 점탄성에 기인한 응력감소 현상이다. 본 연구에서는 재령에 따른 콘크리트의 응력감소 현상을 조사하기 위하여 구속된 원주형, 구속되지 않은 자유건조 원주형, 그리고 자유건조 각주형 콘크리트 시편의 변형률을 측정하였다. 재령 1, 3, 7, 14, 28일에 콘크리트의 탄성계수를 측정하였으며 관입저항 실험을 실시하였다. 실험결과를 기존 연구자들이 제안한 이론식에 대입하여 구속된 원주형 콘크리트 시편의 응력감소를 계산할 수 있었다. 향후 본 연구의 결과를 바탕으로 구속된 콘크리트 시편의 응력감소 현상을 콘크리트 포장의 설계에 적용할 예정이다.

• 한국산학기술학회논문지
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• 제16권4호
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• pp.2713-2725
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• 2015

다양한 요인들이 발달과정에 있는 아동이 안전생활 실천행동을 적극적으로 실천하는데 영향을 주므로, 본 연구는 학령기 아동을 대상으로 학업스트레스, 자아존중감, 안전생활 실천행동 간의 관계를 파악하기 위해 실시되었다. 서울, 경상도, 경기도, 충청도, 전라도 소재의 초등학교 5, 6학년 510명을 대상으로 2013년 4월 1일부터 4월 30일까지 설문조사를 시행하였다. 연구결과, 안전생활 실천행동 영향요인은 안전교육 도움정도(${\beta}=.254$, p<.001), 학업스트레스(${\beta}=-.222$, p<.001), 학년(${\beta}=.201$, p<.001), 성별(${\beta}=-.180$, p<.001)로 나타났고, 이 변수들의 설명력은 23.9%였다. 그러므로, 학령기 아동의 안전생활 실천행동을 고취시키기 위해 학업스트레스 수준을 낮추기 위한 효율적인 관리와 중재가 필요할 것으로 사료된다.