• Toxicological Research
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• 제16권2호
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• pp.163-172
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• 2000

Recently, there is a worldwide concern that a great number of man-made chemicals have a hormone-like action both in humans and in animals. DECD is developing screening programs using validated test systems to determine whether certain substances may have an effect in humans. In the present study. the establishment oj repeated-dose toxicity test method was tried. Flutamide. an anti-androgenic agent. was administered by gavage to Sprague-Dawley rats for 28 days at dose levels of 0. 0.5. 3 and 18 mg/kg body weight (10-15 rats/sex/group) to examine the effects on general findings. especially reproductive and endocrine parameters. Clinical signs. body weights, food consumption, and sexual cycle were checked and measured. For the gross and microscopic examinations. 10 rats/sex/group were sacrificed at the end of dosing period and the remaining animals of control and high dose groups (5 each) were sacrificed after 14 days recovery. Examinations for hematology and clinical chemistry were carried out at necropsy. There were no treatment-related changes in clinical signs. body weights, food consumption. gross necropsy. hematology and clinical chemistry at all doses of both sexes. The period and regularity of sexual cycle were not adversely affected at all doses by the test agent. At 18 mg/kg. both decreased weights of prostate, seminal vesicle and epididymis in males and increased weights of spleen and thymus in females were observed. In addition, decreased number of spermatids and sperms. increased serum testosterone concentration and increased incidence (100%) of interstitial cell hyperplasia were seen in males. At 18 mg/kg of the recovery group. decreased prostate weight. reduced sperm count and increased incidence (20%) of interstitial cell hyperplasia in males and increased thymus weight in females were observed. At 3 mg/kg. reduced sperm count was found. There were no adverse effects on parameters examined at 0.5 mg/kg of both sexes. The results suggested that the potential target organs of flutamide may be accessory sexual glands including testes for males and spleen and thymus for females. Taken together. this test method was found to be a useful screening test system for endocrine disrupting chemicals.

• 대한영양사협회학술지
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• 제16권3호
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• pp.239-254
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• 2010

This study investigated the use and understanding of food and nutrition labels in 498 female adolescents (middle school students: MS 248, high school students: HS 250) in Gyeonggi-do. Fifty percent of the MS and 47.2% of the HS read food labels, and the most common reasons for reading labels were to find a product's expiration date and price. The food label information considered most important by the subjects was the name of the manufacturing company and expiration date. Over 80% of the subjects read nutrition labels. The MS read nutrition labels to find nutrients and their amounts in foods, while the HS read labels mostly in an effort to control body weight. These subjects gave more attention to calories and fat, the nutrients related to body weight, than to other nutrients. The subjects were highly aware of the necessity and positive effects of nutrition labels, because they believed labels could make it easier for them to choose healthy foods. However, scores for understanding nutrition labels showed the subjects failed to understand label information accurately. Generally, the MS showed better dietary behaviors than HS. But the HS had significantly higher scores than MS for the item "know relative weight with height." Those that read food labels had significantly better BMIs, dietary behaviors, and awareness and understanding of nutrition labels. There were significant positive relationships among awareness & understanding of nutrition labels and subjects' dietary behaviors. The study findings can be utilized to better plan nutrition education programs aiming to improve use and awareness of food and nutrition labels among adolescents.

• Advances in environmental research
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• 제3권3호
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• pp.207-216
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• 2014

A study was conducted to determine the phytotoxic effect of mercury on seed germination and seedling growth of an important arid legume tree Albizia lebbeck. The seeds germination and seedling growth performance of A. lebbeck responded differently to mercuric chloride treatment (1 mM, 3 mM, 5 mM and 7 mM) as compared to control. Seed germination of A. lebbeck was significantly (p < 0.05) affected by mercury treatment at 1 mM. Root growth of A. lebbeck was not significantly affected by mercury treatment at 1 mM, and 3 mM. Shoot and root length of A. lebbeck were significantly (p < 0.05) affected by 5 mM concentration of mercury treatment. Increase in concentration of mercury treatment at 5 mM and 7 mM significantly (p < 0.05) reduced seedling dry weight of A. lebbeck. The treatment of mercury at 1 mM decreased high percentage of seed germination (22%), seedling length (10%), root length (21.85%) and seedling dry weight (9%). Highest decrease in seed germination (51%), seedling (34%), root length (48%) and seedling dry weight (41%) of A. lebbeck occurred at 7 mM mercury treatment. A. lebbeck showed high percentage of tolerance (78.14%) to mercury at 1 mM. However, 7 mM concentration of mercury produced lowest percentage of tolerance (51.65%) in A. lebbeck. The seed germination potential and seedling vigor index (SVI) clearly decreased with the higher level of mercury. Plantation of A. lebbeck in mercury-polluted area will help in reducing the burden of mercury pollution. A. lebbeck can serve better in coordinating in land management programs in metal contaminated areas. The identification of the toxic concentration of metals and tolerance indices of A. lebbeck would also be helpful for the establishment of air quality standard.

• 한국학교보건학회지
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• 제30권3호
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• pp.240-250
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• 2017

Purpose: The purpose of this study was to compare the risk of being underweight between multicultural and Korean-origin adolescents. Methods: This study used the Korea Youth Risk Behavior Web-Based Survey data of 2016. A total of 46,457 underweight and normal-weight adolescents were included. General characteristics, health status and health behavior variables, and weight related variables were included. Weighted percentage and means were used to describe the sample. Simple and multiple logistic regressions were conducted using SAS 9.2. Results: From the simple and multiple logistic regression, multicultural adolescents showed a higher risk of being underweight (OR: 1.63, 95% CI: 1.20~2.20; AOR: 1.51, 95% CI: 1.01~2.27) than Korean-origin adolescents. Among the covariates, being female (AOR: 1.90, 95% CI: 1.72~2.10), being older (AOR: 1.18, 95% CI: 1.15~1.22), having poor self-health perception (AOR: 1.56, 95% CI: 1.24~1.82), having longer hours of sleep (AOR: 1.12, 95% CI: 1.09~1.16), having fewer days of exercise (AOR: 0.94, 95% CI: 0.91~0.96), and doing vigorous exercise less (AOR: 0.78, 95% CI: 0.68~0.89) showed a higher risk of being underweight. Self-rated health and effort to control weight were also significantly related to being underweight. Conclusion: Since multicultural adolescents are vulnerable to being underweight, it is necessary to develop intervention programs to reduce the number of underweight multicultural adolescents.

• 정보과학회 논문지
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• 제44권6호
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• pp.559-565
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• 2017

무인항공기는 사람이 탑승하지 않고 미리 설계된 프로그램에 따라 동작하기 때문에 전자기 간섭 등의 외부 영향에 대해 높은 신뢰성을 요구한다. 하지만 소형 무인항공기는 무게 및 공간의 제약으로 인해 외부 영향에 대해 물리적으로 완벽한 저항성을 가지도록 만들기가 어렵다. 이러한 여건으로 인해 기존에 운용 중인 소형 무인항공기는 외부 영향으로 비행제어 컴퓨터가 재시작 될 경우 비행체가 추락하는 상황이 발생하기도 하였다. 따라서 본 논문에서는 소형 무인항공기 비행안전성 향상을 위한 비행제어컴퓨터 알고리즘을 제안한다. 제안하는 알고리즘은 3개의 단계로 이루어져 있다. 첫 번째 단계는 항법장비를 교정하고 유효성을 검증하는 것이다. 두 번째 단계는 이륙단계에 교정데이터를 저장하는 것이다. 세 번째 단계는 비행제어컴퓨터 재시작 발생 시 현재 비행 상태를 판단하고, 비행 중일 경우에 교정데이터를 복구하는 것이다. 제안하는 알고리즘을 실제 소형 무인기에 적용하여 시험한 결과 비행제어컴퓨터가 재시작 되는 상황에도 안전하게 비행 유지가 가능함을 확인할 수 있었다.

• 한국콘텐츠학회논문지
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• 제17권6호
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• pp.250-260
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• 2017

본 연구에서는 종편TV 예능방송프로그램을 중심으로, 수용자가 지각하는 편성특성이 시청의도에 어떠한 영향을 미치는지 시청자 360명의 설문자료를 통해 분석하였다. 본 연구의 연구문제 검증결과를 정리하면 다음과 같다. 종편TV 예능방송프로그램 수용자가 지각하는 편성특성 요인이 시청의도에 미치는 영향을 분석하기 위하여, 개인적 특성을 통제변수로 투입하고, 편성특성을 독립변수로, 시청의도를 종속변수로 설정하여 다중회귀분석을 실시한 결과, 회귀모형이 유의한 것으로 나타났으며, 종편TV 예능방송프로그램 수용자가 지각하는 편성특성 요인이 긍정적일수록 시청의도가 유의하게 향상되는 것으로 볼 수 있다. 또한, 시청의도에 유의한 영향을 미치는 편성특성 요인은 인접성 > 내용적충실성 > 장르비중 > 사회적증거 > 상대적우위 > 접근용이성의 순으로 정(+)의 영향력을 나타내고 있었다. 결국 본 연구는 편성특성이 시청행위에 미치는 효과에 관해 경험적으로 검증하고, 종편 시청행위에 영향을 미치는 편성의 구조적 요인 내에서도 어떠한 우선순위가 있는지 밝혔다는데 의의가 있으며, 본 연구의 결과는 종편채널이 다양한 장르를 제작하고 편성하며, 이 과정에서 방송의 질적 수준과 지속성 및 차별성을 담보할 수 있는 전략이 필요함을 시사한다.

• 대한간호학회지
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• 제37권7호
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• pp.1091-1097
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• 2007

Purpose: This study was done to survey health behaviors in people at risk for a Cerebrovascular Accident(CVA). Method: From November 21 to December 29, 2005, a questionnaire survey was conducted with 171 people at risk for a Cerebrovascular Accident(LDL of above 130mg/dl & homocysteine of above $15.0{\mu}mol/L$). Their physical composition was measured and blood was collected. Results: 1. Of the subjects, 34.5% were smokers, 61.4% were drinkers, 56.7% did not exercise regularly, 57.3% did not control their weight, 26.9% preferred eating meat, and 32.2% preferred salty food. 2. The gender was different between smoking status($X^2=10.734$, p= .001), and drinking status($X^2=7.185$, p= .007), and the age was different between smoking status($X^2=6.656$, p=.010), and drinking status($X^2=10.722$, p= .001). The $HbA_1C$ level was different for regular exercise($X^2=4.824$, p=.028) and the HDL-cholesterol was different for meat-eating preference($X^2=7.928$, p= .005). The observance of troubling signs was different for a salty food preference($X^2=4.313$, p= .038). Conclusion: It is necessary to develop programs for taking care of people at risk for a Cerebrovascular Accident and test the effects of the programs in order to reduce the risk factors of CVA and enhance health behavior promotion.

• 대한지역사회영양학회지
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• 제5권3호
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• pp.502-512
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• 2000

A survey was conducted on 222 students in two elementary schools in rural areas, one was a rural small city and the other was in the countryside. By measuring their skin-foldness in 4 spots by caliper, the body fatness of 5 grades(BFGr) of the subjects was resulted as follows ; 28.0% of boys and 6.7% of girls were classified as obese the and 34.1% of boys and 31.1% of girls as overweight. Comparing by region, children in the small city seemed to be fatter than the ones in the countryside(21.7% vs. 17.2% as obesity). Comparing by gender, boys were fatter than girls(28.0% vs. 6.7% as obesity). When recategorizing body fatness from 5 grades(BFGr) into 3 groups(BFGp) as overweight group(obesity+overweight), normal and underweight group(underweight+severe-underweight), we observed no significant difference in childrens dietary habits and food intake frequencies by BFGp. Overweight and underweight groups enjoyed snacking before dinner more frequently than the normal group(42.1-59.3% vs. 31.5%). The subjects showed poor nutrition knowledge score with relatively high attitude score about weight control and dietary behavior score was a little lower than the attitude score. Nutrition education programs, like camps, should stress on childrens nutrition knowledge. BFGp related to obesity attitude positive, a very low level and the latter related to diet, exercise and fasting attitudes at positive levels. Therefore overweight children seemed to be motivated easily. Also the higher the in exercise-value score, the more increased was shown in exercise attitude at positive, very low level. Emphasizing exercise-value in camp programs might make childrens exercise attitude more positive. As strategies for a rural obesity camp program are being developed by obese and non-obese children. The camp would be held over summer vacation for 3 days(2 nights) at the participants expence not exceeding 50,000 won. Contents of the program cover nutrition knowledge, and exercise-value as well as cooking lessons, exercise practice, and self-esteem enhencement.

• 한국보건간호학회지
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• 제33권3호
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• pp.364-378
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• 2019

Purpose: This study examined the distribution of the body mass index (BMI) according to gender and age among Korean children and adolescents to compare the distributions of being underweight, normal, overweight, and obese using both Korean and international criteria. Methods: This secondary data analysis utilized the data of the 2016 Korean National Health Examination for School Students Height, weight, and BMI distributions among children and adolescents were analyzed using descriptive statistics, and the differences in BMI distribution according to gender and age were analyzed using chi-square tests. Differences in the mean BMI according to the Korean Centers for Disease Control (KCDC), the World Health Organization (WHO), and the International Obesity Task Force (IOTF) criteria were analyzed using ANOVA. Results: Using the IOTF criteria, the prevalence of underweight, overweight, and obesity among grades 1-12 students was 6.7%, 20.8%, and 7.1%, respectively; 1.6%, 21.3%, and 11.8%, respectively, according to the WHO criteria; and 5.8%, 10.1%, and 13.0%, respectively, according to the KCDC criteria. Conclusion: It is recommended to use the IOTF criteria for health promotion programs to target underweight children and adolescents while the WHO and KCDC criteria should be used for health programs for treating obese people.

• 디지털융복합연구
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• 제14권7호
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• pp.251-258
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• 2016

본 연구는 일 지역 독거노인의 일상생활동작과 스트레스와의 관계를 확인하고자 시행하였다. 대상자는 총 260명으로 2014년 10월 20일부터 11월 20일까지 자가보고식 설문지를 이용하여 자료를 수집하였다. 자료는 기술적 통계, t-test, ANOVA, Pearson Correlation Coefficients로 분석하였다. 대상자의 건강상태 특성별 일상생활동작에서 통계적으로 유의한 변수는 식습관 문제, 음주, 부적절한 건강관리, 관리군이었고, 스트레스에 통계적으로 유의한 변수는 스트레스 유무와 약물남용이었다. 독거노인이 지각한 일상생활동작과 스트레스간의 상관관계를 분석한 결과, 음의 상관관계를 나타내었다. 본 연구결과는 독거노인의 건강상태를 파악하고 일상생활동작과 스트레스를 조절하는 프로그램을 개발하는데 유용하다. 나이가 들면서 체중변화와 만성질환으로 일상생활동작이 불편한 독거노인의 일상생활동작을 향상시키기 위한 신체활동 프로그램 적용과 스트레스 관리 전략적용이 요구된다.