• 한국산업보건학회지
• /
• 제20권3호
• /
• pp.156-167
• /
• 2010

To evaluate the effect of lead biomarkers including bone lead on neurobehavioral test in retired lead workers, 131 retired lead workers without any occupational exposure to organic solvent, mercury and arsenic were agreed to participate this study. For the control subjects 56 non-occupationally lead exposed subjects were recruited from same area of retired lead workers with consideration of demographic characteristics. The mean levels of blood and bone lead of retired lead workers were significantly higher than control group and there were significant correlation among other lead biomarkers. Compared with controls without occupational lead exposure, lead exposured subjects had worse performance on 10 tests out of 12 neurobehavioral tests, but only two tests(Purdue pegboard nondominant and both hand) showed statistical significance of differences. In multiple linear regression analysis of neurobehavioral tests with lead biomarkers and demographic and lifestyle variables, age was associated negatively with 11 neurobehavioral tests, whereas log-transformed ZPP was associated with Purdue pegboard(both hand) and Santa Ana manual dexterity(non-dominant hand). On the other hand, tibia lead was associated Pursuit aiming test(correct) and Purdue pegboard(dominant hand) and calcaneal lead was associated with Purdue pegboard(dominant hand). This study confirmed that among all relevant variables age was most significantly associated with the poor performance of neurobehavioral tests. The blood lead did not have any significant association with neurobehavioral tests, but tibia and calcaneal bone lead and blood ZPP showed significant association with a few tests even after more than mean 9 years from their retirements.

• Tuberculosis and Respiratory Diseases
• /
• 제83권1호
• /
• pp.61-70
• /
• 2020

Background: Circulating tumor cells (CTCs) are frequently detected in patients with advanced-stage malignant tumors and could act as a predictor of poor prognosis. However, there is a paucity of data on the relationship between CTC number and primary tumor volume in patients with lung cancer. Therefore, our study aimed to evaluate the relationship between CTC number and primary tumor volume in patients with lung adenocarcinoma. Methods: We collected blood samples from 21 patients with treatment-naive lung adenocarcinoma and 73 healthy individuals. To count CTCs, we used a CTC enrichment method based on fluid-assisted separation technology. We compared CTC numbers between lung adenocarcinoma patients and healthy individuals using propensity score matching, and performed linear regression analysis to analyze the relationship between CTC number and primary tumor volume in lung adenocarcinoma patients. Results: CTC positivity was significantly more common in lung adenocarcinoma patients than in healthy individuals (p<0.001). The median primary tumor volume in CTC-negative and CTC-positive patients was 10.0 ㎤ and 64.8 ㎤, respectively. Multiple linear regression analysis showed that the number of CTCs correlated with primary tumor volume in lung adenocarcinoma patients (β=0.903, p=0.002). Further subgroup analysis showed a correlation between CTC number and primary tumor volume in patients with distant (p=0.024) and extra-thoracic (p=0.033) metastasis (not in patients with distant metastasis). Conclusion: Our study showed that CTC numbers may be associated with primary tumor volume in lung adenocarcinomas patients, especially in those with distant metastasis.

• Child Health Nursing Research
• /
• 제11권3호
• /
• pp.348-355
• /
• 2005

Purpose: In order to provide basic information for the development of nursing programs, health promoting behavior of students rewriting college entrance examinations was examined and factors related to health promotion were identified. Method: Data were collected by questionnaire from 804 examines in Seoul and Gyeonggi Province and were analyzed using the SAS program with t-test, ANOVA, Scheffe's test and Pearson correlation coefficients. Result: The mean score for health promoting behavior was 2.50. The highest score for the sub-areas was harmonious relationships and the lowest was, professional health maintenance. There were significant differences in health promoting behavior according to the following general characteristics; religion, frequency of rewriting college entrance examination, economic burden, parents' education level, grade, satisfaction with parents, friends and rewriting of college entrance examinations, parents' health concernsand knowledge of health, need for health education, and health condition and chronic disease over the past year. Correlations between health promoting behavior and family support and self-esteem were positive. The variables that influenced health promoting behavior were family support ($24.5\%$), self-esteem ($11.3\%$), anxiety ($2.6\%$), and stress of studying ($0.5\%$), explaining $38.9\%$ of the total variance. Conclusion: These results will help to develop a nursing program that enhances health promoting behavior of students rewriting college entrance examinations.

• 한국산학기술학회논문지
• /
• 제14권7호
• /
• pp.3211-3217
• /
• 2013

대학생의 취업에 대한 부담과 불안감이 날로 심해지고 있는 가운데, 그들의 역기능적 태도가 취업불안에 어떤 영향을 미치는지에 대해 알아보았다. 본 연구 대상자는 수도권 소재 대학생 600명으로 하였다. 조사 기간은 2012. 5. 21.~6. 1까지 이루어졌다. 연구 결과 첫째, 역기능적 태도가 취업불안에 미치는 영향은 심리상태 27%, 유발상황 18%, 부모기대 10%로 나타났으며 특히 완벽성이 취업불안에 많은 영향을 미치는 것으로 분석되었다. 둘째, 역기능적 태도와 취업불안의 상관분석 결과, 역기능적 태도는 심리상태 유발상황 부모기대에 모두 정적인 영향력을 보이고 있었다. 대학생의 취업불안을 낮추고, 그들이 건강한 직장생활을 준비할 수 있도록 역기능적 태도에 관해 보다 면밀한 진단과 개입이 필요하다. 특히 완벽성의 역기능적인 면을 최소화하고 취업목표를 성취하는데 원동력으로 작용하도록 돕는 프로그램 등에 대한 개발과 연구가 필요하다.

• 한국산학기술학회논문지
• /
• 제13권12호
• /
• pp.5800-5807
• /
• 2012

본 연구의 목적은 중학생의 스트레스, 신체증상 및 정신건강을 확인하여 스트레스 예방과 관리에 필요한 간호중재 방안을 도출하는데 기초자료를 제공하기 위한 것이다. 연구대상자는 강원도 T시에 위치한 중학생 171명으로 수집된 자료는 SPSS win17.0 프로그램을 이용하였다. 연구결과, 스트레스와 정신건강, 스트레스와 신체증상, 정신건강과 신체증상간의 유의미한 상관관계가 있었다. 중학생들의 스트레스는 학교생활에서 학업문제 요인으로 나타냈고, 이것은 우리나라 중학생들이 진학에 대한 입시부담을 안고 있는 현실을 대변해주는 것으로 사료된다. 또한 중학생들의 스트레스, 정신건강, 신체증상간의 유의한 상관성은 지속적인 관찰과 관리가 필요하다.

• 전기학회논문지
• /
• 제61권7호
• /
• pp.992-997
• /
• 2012

In this paper, we were analyzed the vibration characteristics of the three-phase cast resin transformer using less than 50% of load in the field. Most of the cast resin transformer is less than 50% in the domestic field is used for load conditions. Consisting of a solid insulator cast resin transformer is generating lots of noise and vibration. In addition, because it is affected by Joule 's heat is used in light load conditions. As a results, the transformer vibrations at frequencies below about from 200Hz to 500Hz were detected. Vibration velocity depends on the load variations were found. Load up to approximately 20-30% in most cases the vibration velocity was found at 4,000 ${\mu}m/s$ or less, 8,000 ${\mu}m/s$ or more. Vibration frequency at light load conditions were generated at the 120Hz, 240Hz, 360Hz and 480Hz. At the load condition of from 10% to 20%, vibration velocity is higher than another. Most of the vibration velocity were identified at the 1,000 ${\mu}m/s$ or less. Using the vibration frequency and velocity measurements data, the load on the cast resin transformer analyzed the correlation of the burden. Therefore, this data could be found in the vibration characteristics of the light-load conditions. If the field measurements using the data perform diagnostics on the transformer, it's expected to be very effective.

• 한국생활과학회지
• /
• 제21권6호
• /
• pp.1235-1250
• /
• 2012

This study is to investigate the housing conditions and housing satisfaction of Chinese students in S. Korea, and identified effective factors for related housing design. Chinese students at CBNU participated in this survey from November to December in 2011. A questionnaire survey was used. 200 students voluntarily participated in this survey with 147 surveys providing useful data for analysis. Descriptive statistics, correlation, and linear regression were used to analyzed the data with SPSS 12.0. The results are as follow. 1) Many Chinese students received housing information from discussion with acquaintance. They lived together 2 students in one-room or dormitory. Monthly rental was about 240,000 won, and they found the living conditions a burden. 2) They are unsatisfied with food, the lack of a refrigerator, and non availability kitchen facilities. These factors are considered in planning for Chinese students housing. 3) For the most part, they are satisfied with their current housing environment, although there is a need to improve health related housing environment factors, including sunlight, noise, and indoor air. The effective residential factors to overall housing satisfaction are dwelling space and size, space organization and floor plan, kitchen toilet bathroom facilities, sunlight, and safety from natural disasters. The effective neighborhood factors identified include access to natural environment, community facilities, parks, noise, and commuting time. 4) Subjective factors played a larger role in overall housing satisfaction than did objective factors such as gender and types of house.

• 지역사회간호학회지
• /
• 제14권3호
• /
• pp.488-495
• /
• 2003

Purpose: This study was attempted to provide the basic data in order to develop a supportive system for the family by investigation of the general and disability-related features of the industrial accident disabled and their family function. Method: Three hundred and forty six industrial accident disabled were randomly selected among those who resided in the Seoul, Incheon, and Gyeonggi areas, and who were confirmed as disabled according to its severity from the first to fourteenth grade from January, 1998 to December, 2000. The data were collected for one month from August 1 to August 31, 2001. Each study team consisted of two members out of 20 researchers and they interviewed the disabled individually by visiting their homes. Collected data were analyzed using frequency, percentages, t-test, ANOVA, and Correlation, etc. Results: The average score for family function was 102.60. The adaptability represented the highest score among the concepts dependent on the family function. The concepts were cohesion, adaptability and communication, which scored as 33.59, 35.38, 33.34, respectively. The family function was significantly different in education, marital status and subjective health status. In particular, the family function was excellent from the industrial accident disabled who had graduated from middle school, was married, and felt healthy. Depression and quality of life were other factors, which were also correlated significantly with the family function. The lower the degree of depression and the better the quality of life, the better the family function. Conclusion: The industrial accident disabled who had been in poor health or faced with difficulties in daily activities even after the therapy for the disability was completed. In particular, their family always had a great burden to care for the disabled and to take financial responsibility. Therefore, the rehabilitation program for the disabled should be family oriented.

• 대한통합의학회지
• /
• 제10권1호
• /
• pp.1-11
• /
• 2022

Purpose : Obesity is a major public health burden in developed countries and a well-known risk factor for cardiovascular disease. Short sleep duration is associated with obesity, as well as diabetes, heart disease and death. In modern society, habitual sleep restrictions seem unavoidable due to social obligations and work schedules along with a tendency toward decreased sleep time. Therefore, the purpose of this study is to examine the effect of differences in sleep time between weekdays and weekends on body mass index (BMI). Methods : This study involved 4,234 Korean adults aged 20 to 64 years based on data obtained from the 7th national health and nutrition examination survey (2016). All subjects were classified into the weekend catch-up sleep group (weekend CUS group). and the non catch-up sleep group (non-CUS group). Results : The longer the average sleep time, the lower was the BMI, and the larger the difference in sleep time between weekdays and weekends, the lower was the BMI. Compared with those with an average sleep time of 8 hours or more, obesity was 1.6-fold higher when the average sleep time was less than 6 hours, and 1.2-fold higher in the case of sleep time of 7 hours or more and less than 8 hours. When the difference in sleep time between weekdays and weekends was 0 or less, more than 0 hours but less than 1 hour, and more than 1 hour and less than 2 hours, the risk of obesity was 1.2-fold, 1.1-fold and 1.1-fold higher, respectively, compared with the risk associated with a sleep time difference of 2 hours or greater between weekdays and weekends. However, the difference was not statistically significant. Conclusion : Short sleep duration is positively associated with obesity. In addition, weekend catch-up sleep affects BMI.

• 한국항행학회논문지
• /
• 제8권1호
• /
• pp.26-37
• /
• 2004

차분 위성 항법에 있어서 빈번한 동적 변화를 수반하는 항체에 대하여 편향되지 않은 위치 추정치를 생성하기 위해서는 위상 평활화 코드 필터가 널리 사용되고 있다. 위치추정, 오차해석, 고장진단, 그리고 미지정수 결정 등 보정위성항법시스템의 다양한 응용분야에 있어서 정확한 오차공분산 정보는 중요한 역할을 담당한다. 반면, 기존의 위상 평활화 코드 필터 알고리즘들은 대부분 누적위상 측정오차에 의한 시전달 오차를 무시하므로 실재에 비하여 낙관적인 오차공분산 정보를 생성할 위험성을 내포하고 있다. 위상 평활화 코드 기법의 활용에 있어서 일관성 있고 적절한 오차공분산 정보를 생성하기 위하여 본 논문에서는 Stepwise Optimal Position Projection Filter와 Stepwise Unbiased Position Projection Filter 알고리즘을 제안하였다. 제안된 필터는 기존의 필터에 비하여 누적위상의 특성에 기인하는 시전달 오차의 특성을 정확하고 상세하게 고려하여 주며 잦은 가시위성의 변화도 함께 고려할 수 있는 장점을 가진다. 몬테카를로 시뮬레이션에 의하여 수신기 Kalman 필터, 기존의 위상 평활화 코드 필터, 그리고 제안된 두 필터들의 성능을 비교 분석 하였다.