• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1999년도 춘계학술대회 논문집
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• pp.161-164
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• 1999

Estimation system of aging diagnosis using partial discharge(PD) is being highlighted as a research area for the residual lifetime pridiction of industrial equipment. But the application of PD requires complicated analysis method as expert system because the PD has complex progressing forms according to external stress. In this paper, it has been investigated the statistical distribution to express the 2D PD patterns of the diagnosis system using neural network(NN).

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 추계 학술논문 발표대회
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• pp.230-231
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• 2013

A fire outbreak in a reinforcement concrete structure looses the organism by different contraction and expansion of hardened cement pastes and aggregate, and causes cracks by thermal stress, leading to the deterioration of the durability. So, concrete reinforcement structure is damaged partial or whole structure system. Therefore accurate diagnosis of deterioration is needed based on mechanism of fire deterioration in general concrete structures. Fundamental information and data on the properties of concrete exposed to high temperature are necessary for accurate diagnosis of deterioration. In this study, consider case of investigation methods and repair work in fire damaged structure concrete.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 춘계 학술논문 발표대회
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• pp.16-18
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• 2013

A fire outbreak in a reinforcement concrete structure looses the organism by different contraction and expansion of hardened cement pastes and aggregate, and causes cracks by thermal stress, leading to the deterioration of the durability. So, concrete reinforcement structure is damaged partial or whole structure system. Therefore accurate diagnosis of deterioration is needed based on mechanism of fire deterioration in general concrete structures. Fundamental information and data on the properties of concrete exposed to high temperature are necessary for accurate diagnosis of deterioration. In this study, consider case of investigation methods and repair work in fire damaged structure concrete.

• 지구물리
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• 제5권3호
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• pp.199-209
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• 2002

경상북도 경주시에 위치한 불국사 다보탑의 구조 안전 진단을 목적으로 탑의 각 부재에 대한 비파괴 정밀 조사가 실시되었다. 암석 부재의 역학적 성질을 추정하기 위해 255개 부재에서 641 지점에서 초음파 속도를 측정하였으며, 그 결과는 P-파 속도 범위가 $584{\sim}5169m/sec$이며 평균 속도는 2876m/sec이다. 일축압축강도는 $93{\sim}1314kg/cm^2$ 범위로 평균치가 $396kg/cm^2$이고, 풍화도지수는 $0.07{\sim}0.88$의 범위로 평균 0.43으로 중간정도의 풍화를 받은 것으로 나타났다. 각 암석부재의 파괴강도와 이에 작용하는 응력을 비교한 결과, 탑의 구조에 관계된 부재들의 상태는 비교적 양호한 상태를 보여주지만, 편하중에 의한 부분 파괴의 가능성이 남아있다. 편하중에 의한 균열이 계속 진행중인지 모니터링이 필요하며, 편하중을 제거하기 위한 대책이 중요하다. 1층 및 2층 옥신부 주변의 난간은 비교적 작은 부재들로 이루어져 있어 풍화가 많이 진전되었지만 구조적 불안정에는 직접 관련이 없다.

• 대한치과의사협회지
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• 제54권11호
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• pp.897-906
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• 2016

Objectives: Periodontitis is multifactorial disease mainly caused by microbial community. Recently, some research has been conducted to find other possible risk factors including stress hormones related to periodontitis. Psychological stress can affect the periodontal health by a variety of biological mechanisms. This study compared the stress hormone levels in healthy subjects and patients with periodontal disease using saliva in order to investigate the association between periodontitis and stress. Methods: The human saliva was collected from 38 periodontally healthy individuals and 34 patients with chronic periodontitis under Institutional Review Board. Their age was 20-60 years ($40.3{\pm}10.45$). From these samples, determination of salivary levels of cortisol and Dehydroepiandrosterone (DHEA) performed by enzyme immunoassay kit (Salimetrics Europe, Suffolk, UK). The independent t-test and Mann-Whitney test for trend was applied using IBM SPSS statistics version 12.0 Program to analyze statistically significant differences. Results: Salivary cortisol levels of periodontitis patients were higher than those levels of healthy subjects (P < 0.001), while salivary DHEA levels of periodontitis patients were not significantly different (P = 0.431). Salivary cortisol/DHEA ratio of periodontitis patients was higher than those levels of healthy subjects (P < 0.001). Conclusions: Our study demonstrates the high levels of cortisol concentrations and cortisol/DHEA ratio in saliva of periodontitis patients than those of healthy subjects. Since cortisol levels and cortisol/DHEA ratio can be significant factors related to the severity of periodontal disease, our study would be helpful for early diagnosis and treatment of periodontal disease.

• 환경생물
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• 제28권2호
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• pp.101-107
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• 2010

Metal ions are essential to life. However, some metals such as mercury are harmful, even when present at trace amounts. Toxicity of mercury arises mainly from its oxidizing properties. Ionizing radiation (IR) is an active tool for destruction of cancer cells and diagnosis of diseases, etc. IR induces DNA double strand breaks in the nucleus, In addition, it causes lipid peroxidation, ceramide generation, and protein oxidation in the membrane, cytoplasm and nucleus. Yeasts have been a commonly used material in biological research. In yeasts, the physiological response to changing environmental conditions is controlled by the cell types. Growth rate, mutation and environmental conditions affect cell size and shape distributions. In this work, the effect of IR and mercury chloride (II) on the morphology of yeast cells were investigated. Saccharomyces cerevisiae cells were treated with IR, mercury chloride (II) and IR combined with mercury chloride (II). Non-treated cells were used as a control group. Morphological changes were observed by a scanning electron microscope (SEM). The half-lethal condition from the previous experimental results was used to the IR combined with mercury. Yeast cells were exposed to 400 and 800 Gy at dose rates of 400Gy $hr^{-1}$ or 800 Gy $hr^{-1}$, respectively. Yeast cells were treated with 0.05 to 0.15 mM mercury chloride (II). Oxidative stress can damage cellular membranes through a lipidic peroxidation. This effect was detected in this work, after treatment of IR and mercury chloride (II). The cell morphology was modified more at high doses of IR and high concentrations of mercury chloride(II). IR and mercury chloride (II) were of the oxidative stress. Cell morphology was modified differently according to the way of oxidative stress treatment. Moreover, morphological changes in the cell membrane were more observable in the frequently stress treated cells than the temporarily stress treated cells.

• 재활간호학회지
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• 제7권2호
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• pp.115-126
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• 2004

Purpose: This study was carried out to accumulate basic data for nursing intervention development by evaluating the stress and emotional status of patients and their families after receiving hematopoietic stem cell transplantation (HSCT), illucidating and analysing related factors in order to decrease the negative effects of HSCT on their emotion. Methods: Data were collected using a questionnaire to 53 HSCT patients and 50 families, who were older than 18 at tertiary-care institutions in Seoul, from January, 2000 to August, 2003. Results: There was a significant score difference in stress (t=-2.302, P<0.05). Correlation between stress and emotional status was statistically significant (r=0.486, P<0.01; r=0, P<0.05). Economical burden of cost had significant effects on stress of patients (F=4.194, P<0.05). The series of emotional status of patients without jobs were higher (T=-2.583, P<0.05). The emotional status of families were influenced by monthly income (F=4.036, P<0.05) and patients' diagnosis (F=3.088, P<0.05). Conclusion : These results suggest that the cares for families should be considered with great concern as well as the ones for patients. In addition, such factors as economical burden by medical cost, monthly income and job status should not be excluded in transplantation nursing plans.

• Asian Pacific Journal of Cancer Prevention
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• 제13권4호
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• pp.1645-1649
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• 2012

Purpose: This study aimed to assess possible interactive effects of coping styles and psychological stress on depression and anxiety symptoms in Chinese women shortly after diagnosis of breast cancer. Methods: Four hundred and one patients with breast cancer were face-to-face interviewed by trained research staff according to a standardized questionnaire including information on socio-demographic characteristics, psychological stress, coping styles, and anxiety and depressive symptoms. Interactive effects were assessed by hierarchical multiple regression analyses. Results: There were significant associations of the four domains of psychological stress with anxiety and depressive symptoms except for the relationship between "worrying about health being harmed" and depressive symptoms. "Abreaction coping behavior" and "escaping coping behavior" significantly increased the level of both anxiety and depressive symptoms; whereas an "active coping style" reswulted in significant decrease. The interaction of "active coping behavior" with "worrying about health being harmed" significantly increased the risk of the anxiety symptoms, while adopting "self-relaxing coping behavior" was associated with significant decrease. The interaction of "worry about daily life and social relationship being restricted" with "escaping coping behavior" significantly increased the risk of the depressive symptoms. Conclusions: The results of this study suggest that certain coping styles might moderate the association of psychological stress with anxiety and depressive symptoms in Chinese women with breast cancer.

• 대한한방부인과학회지
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• 제21권2호
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• pp.252-262
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• 2008

Purpose: This paper is aim to report that menopausal disorder can be effectively diagnosed and treated by referring to the life event stress of patient. Methods: Researchers got a grip on the life event stress of patient by using medical examinations by interview and compared the conditions of patient before and after treatment by using Kupperman's Index. The prescription of the Gamidangguisu-san hap samhap-tang( Jiaweidangguixu-san he sanhetang) and the Gamisoyo-san (Jiaweixiaoyao-san) and the acupuncture therapy and the moxibustion therapy were used for the treatment. Results: The serious musculoskeletal systemic pains, which includes back pain, lumbago, and myalgia, and other menopausal troubles were improved remarkably. Conclusion: The menopausal disorder could be caused by not only the change of hormone but also complex factors of environmental matters which includes social cultural surroundings, mentality etc. Therefore the life event stress could be one of critical factors of menopausal disorder. The diagnosis and treatment considering the life event stress could be effective method to relieve patient's menopausal disorder.

• 대한한방소아과학회지
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• 제27권2호
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• pp.1-10
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• 2013

Objectives The aim of this study was to explore the effect of parental attitude on the behavioral problems in children who visited the traditional Korean pediatrics clinic. Methods The subjects were consist of 190 outpatients ($56.6{\pm}12.9$ months) and their mother. The Behavior problems of children were measured with Korean version of Child Behavior Checklist for Ages 1.5-5 (K-CBCL1.5-5) while parental perception of child vulnerability, parent overprotection, parenting stress were measured by Child Vulnerability Scale (CVS), Parent Protection Scale (PPS), Korean-Parenting Stress Index-Short Form scale (K-PSI-SF), respectively. Correlation and multiple regression were conducted for the analysis. Results Significant correlations between child total problems score and child vulnerability (r=.272, p<.001), parent overprotection (r=.243, p=.001), and parenting stress (r=.597, p<.001) were reported. Multiple regression analysis revealed that the parenting stress (${\beta}$=.548, p<.001) was a major predictor for the child behavior problems rather than child vulnerability and parent overprotection. Conclusions It was shown that the parenting stress has a significant influence on the emotional and behavioral development of children. These results can be useful for improving clinical diagnosis and treatment in traditional Korean pediatrics.