• 한국치위생학회지
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• 제13권6호
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• pp.1015-1021
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• 2013

Objectives : The purpose of the study is to find the association between obesity and periodontal disease by age in adults. Methods : The subjects were 5,728 adults in the first year of the Fifth National Health and Nutrition Examination Survey in 2010. The questionnaire included oral examinations, periodontal disease, and body mass index screenings. Chi-square test was performed to confirm the periodontal disease. Results : The impact of obesity and waist circumference on body mass index (BMI) showed high risk of periodontal diseases. The risk of periodontal disease according to BMI by age was closely related to obesity ranged form 35 to 59 yeard old. The increased waist circumference and those who were in 35 to 59 and over 60 years old had a significant association with the periodontal disease risk. Conclusions : Obesity and periodontal disease are closely related factors. Those aged from 35 to 59 are the high risk groups of potential obesity and periodontal disease. It is very important to control well-balanced nutrition and physical activity that can prevent the progression of periodontal disease.

• International journal of advanced smart convergence
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• 제12권4호
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• pp.407-417
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• 2023

The purpose of this study is to identify the level of safety perception, ethical awareness, and safety activities of nursing students for patients, and to identify the correlation and impact between them. The research design is a descriptive survey study, and the subject of the study were 197 nursing college students in G City. Safety perception, ethical awareness, and safety activity tools were used for, and the data collection period was from October 17 to 28 in 2022. T-test, one-way ANOVA, Pearson's correlation coefficient, Regression analysis were used to analyze data. The result of the study indicated that the average level of safety perception of nursing students was 3.72 points, the average ethical awareness of patients, professional work, and cooperators perceived by nursing students was 3.04 points, and the safety activities of nursing students were 4.20 points. In the case of safety awareness and ethics awareness, r=.327, a significant positive correlation, in the case of safety awareness and safety activities, r=.399, significant positive correlation, ethics awareness and safety activities as r=.296. And so on these results showed that high safety perception increases safety activities, and high ethical awareness increases safety activities. Therefore, we need practical and step-by-step convergence education to equip nursing students with patient safety nursing capabilities. To this end, a safer environment will be created if the social support network for the systematic application of safety education is well formed.

• 대한화학회지
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• 제60권1호
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• pp.39-47
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• 2016

이 연구의 목적은 논의기반 탐구 활동에서 협상이 중학생의 주장과 증거 생성 능력에 미치는 영향을 알아보기 위한 것으로 논의기반 탐구 활동에서 학생들이 작성한 주장과 증거의 수준을 분석하였다. 이 연구는 남녀공학 중학교 1학년 4개 학급 학생(126명)을 대상으로 1년에 걸쳐 5개의 활동을 적용하였다. 활동을 분석하기 위한 평가틀을 개발하여 주장과 증거를 분석하였으며 주장과 증거의 생성 과정을 알아보고자 활동 후에 학생 인터뷰를 실시하여 분석하였다. 연구 결과는 논의기반 탐구 활동에서 학생들이 제시한 주장과 증거는 개별 활동에서 조 활동으로 진행됨에 따라 주장과 증거의 수준이 높아졌고, 활동이 거듭됨에 따라 전반적으로 향상되는 경향을 나타냈다. 이는 논의기반 탐구 활동을 통하여 학생들이 내적 및 외적 협상을 경험하면서 수준 높은 주장 및 증거를 형성하게 된 것임을 보여준다.

• 청정기술
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• 제29권1호
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• pp.39-45
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• 2023

To investigate the effects of Mg addition at different aging times and temperatures, Cu/MgO/Al₂O₃ catalysts were synthesized for the low-temperature water gas shift (LT-WGS) reaction. The co-precipitation method was employed to prepare the catalysts with a fixed Cu amount of 30 mol% and varied amounts of Mg/Al. Synthesized catalysts were characterized using XRD, BET, and H₂-TPR analysis. Among the prepared catalysts, the highest CO conversion was achieved by the Cu/MgO/Al₂O₃ catalyst (30/40/30 mol%) with a 60 ℃ aging temperature and a 24 h aging time under a CO₂-rich feed gas. Due to it having the lowest reduction temperature and a good dispersion of CuO, the catalyst exhibited around 65% CO conversion with a gas hourly space velocity (GHSV) of 14,089 h-1 at 300 ℃. However, it has been noted that aging temperatures greater or less than 60 ℃ and aging times longer than 24 h had an adverse impact, resulting in a lower surface area and a higher reduction temperature bulk-CuO phase, leading to lower catalytic activity. The main findings of this study confirmed that one of the main factors determining catalytic activity is the ease of reducibility in the absence of bulk-like CuO species. Finally, the long-term test revealed that the catalytic activity and stability remained constant under a high concentration of CO₂ in the feed gas for 19 h with an average CO conversion of 61.83%.

• 환경영향평가
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• 제24권3호
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• pp.217-232
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• 2015

본 연구의 목적은 전주천의 환경특성과 이용자 모니터링을 통한 구간별 하천관리방안 모색에 있다. 전주천 생태하천 복원구간의 환경특성으로 상류는 전주한옥마을과 인접하고 매우 좋은 수질과 자연하천경관을 갖고 있으며, 중 하류는 수질상태가 양호하고 시설물이 집중되어 하천의 이용이 높은 구간이다. 설문을 통해 이용자특성, 이용행태, 시민참여, 중요도 우선순위, 중요도-만족도를 조사하였고, 설문응답 총 454부 중 무응답 완전제거 후 383부에 대한 인구 통계적 분석과 중요도-만족도 분석 (Importance-Satisfaction Analysis: ISA)을 수행하였다. 그 결과 상 중류는 60대 이상, 하류는 30~50대의 이용률이 높고, 10분 이내, 도보권 이용자들이 운동을 목적으로 '혼자', '계절과 관계없이', '매일' 혹은 '주 2~3회' 방문하는 것으로 나타났다. '생태체험 활동'과 '하천지킴이 참여'는 '경우에 따라 참여'가 세구간 평균 78%로 나타났다. 중요도 우선순위에서 상 하류는 '수질' > '녹지연결' > '산책로', 중류는 '수질 > '식물관리' > '산책로'로 나타나 '수질'이 가장 중요함을 알 수 있었다. ISA 결과, 전 구간 10개 항목의 만족도(3.00)가 중요도(4.02)보다 낮아 개선이 필요하며, '우선시정' 관리로 상류는 '식물 및 시설물관리', 중 하류는 '식물관리', 전체 구간은 '식물관리'(I-S: 4.13, 2.89)로 나타났다.

• 대한화학회지
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• 제65권6호
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• pp.468-483
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• 2021

이 연구는 협력적 문제해결 중심 교수모델(CoProC)을 적용한 과학 수업이 공업계열 특성화고 학생들의 인성 역량과 과학의 정의적 특성에 미치는 영향을 알아보는 것을 목적으로 하였다. 이를 위해 공업계열 특성화 고등학교 화학공업과 2학년 2개 학급 43명을 대상으로 인성 역량 및 과학의 정의적 특성 검사지, 각 모둠별 논의 과정 음성 녹음본, 수업 되돌아보기 활동지를 분석하였다. 연구 결과, 인성 역량 검사 총점에서 실험집단 학생들은 비교집단 학생들보다 통계적으로 유의미한 차이를 보였으며 9개의 하위 인성 역량 요소에서 비교집단에 비해 통계적으로 유의미한 차이가 나타났다. 과학의 정의적 특성 검사 결과, 실험집단 학생들은 총점에서 비교집단 학생들보다 통계적으로 유의미하게 높게 나타났으며, 흥미의 일관성을 제외한 7개의 하위 요소에서 통계적으로 유의미한 차이를 보였다. 따라서 협력적 문제해결 중심 교수모델(CoProC)을 적용한 과학 수업은 공업계열 특성화고 학생들의 인성 역량과 과학의 정의적 특성을 향상시키는데 효과가 있었다.

• Journal of Preventive Medicine and Public Health
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• 제51권3호
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• pp.130-139
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• 2018

Objectives: Air pollution is a growing concern in Korea because of transboundary air pollution from mainland China. A panel study was conducted to clarify the effects of air pollution on respiratory symptoms and health-related quality of life (HR-QoL) in outpatients with and without chronic obstructive pulmonary disease (COPD) in Korea. Methods: Patients filled out a questionnaire including self-reported HR-QoL in February and were followed up in May and July. The study was conducted from 2013 to 2015, with different participants each year. Air quality parameters were applied in a generalized estimating equation as independent variables to predict factors affecting HR-QoL. Results: Lower physical fitness scores were associated with Asian sand dust events. Daily activity scores were worse when there were high concentrations of particulate matter (PM) less than $10{\mu}m$ in diameter ($PM_{10}$). Lower social functioning scores were associated with high PM less than $2.5{\mu}m$ in diameter and nitrogen dioxide ($NO_2$) concentrations. High $NO_2$ concentrations also showed a significant association with mental health scores. Weather-related cough was prevalent when $PM_{10}$, $NO_2$, or ozone ($O_3$) concentrations were high, regardless of COPD severity. High $PM_{10}$ concentrations were associated with worsened wheezing, particularly in COPD patients. Conclusions: The results suggest that PM, $NO_2$, and $O_3$ cause respiratory symptoms leading to HR-QoL deterioration. While some adverse effects of air pollution appeared to occur regardless of COPD, others occurred more often and more intensely in COPD patients. The public sector, therefore, needs to consider tailoring air pollution countermeasures to people with different conditions to minimize adverse health effects.

• 한국재난정보학회 논문집
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• 제8권1호
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• pp.47-55
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• 2012

현재 국내에서 다양한 고층건축물에 대한 건설프로젝트가 진행 중에 있다. 이러한 건축물은 경제적 효과의 극대화 등 다양한 장점을 보유하고 있지만, 동시에 화재, 테러 등의 위기 발생 시 상상 이상의 피해를 가져올 가능성도 가지고 있다. 이에 본 연구는 고층건축물의 피해저감대책에서 소방대원이 건축물 내부의 화재현장으로 진입 시, 소방활동 가능범위에 주목을 하였다. 구체적으로 소방대원이 지상 1층부터 진입 시 현실적인 한계성 등을 파악하기 위하여 최상층 54층까지 (1)공기호흡기 면체 미착용시의 도착소요시간, (2)공기호흡기 면체 착용시의 도착소요시간, 소모압력에 대한 측정을 실시하였으며, 측정결과를 바탕으로 소방 활동 시에 작전가능 수행범위를 제시하였다.

• 한국의류산업학회지
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• 제7권5호
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• pp.535-541
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• 2005

The health of feet is connected with individual's health and affects a man's activity. Shoes need to be designed to protect feet and to absorb the impact of land. In order to choose suitable shoes for feet, the foot size and shape must be considered, so it is essential to grasp the exact size and shape of the foot. This study aims to present fundamental data on shoes' easy order prototype development for choosing shoes of good wearing comfort, by classifying feet size and shape junior high school boys in the early adolescent period. The subject were 234 Korean junior high school boys age from 14 to 16 years old. The subjects were directly measured anthropometrically and indirectly analyzed photographically. 6 factors were extracted through factor analysis and those factors comprised 79.42% of total variance. The factors characterizing foot girth and width, foot length, foot height, foot shape around the fifth toes, angle of foot breadth and foot shape around the first toes. 3 clusters as their foot shape were categorized using 6 factor scores by cluster analysis. Type 1 was characterized by long large foot with deformed first toe. Type 2 had smaller in foot girth, width and length than other types and with deformed fifth toe. Type 3 had average size and high foot shape. Shoes prototype which is to be developed later on will be able to generate 2D flattening in the foot sole form. Therefore, it would be a great support in producing and choosing appropriate shoes if forms are classified by subdividing foot form classification and extract a factor which shows only the foot sole shape.

• 한국의류산업학회지
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• 제9권3호
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• pp.319-326
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• 2007

The health of feet is connected with individual's health and affects a man's activity. Shoes need to be designed to protect feet and to absorb the impact of land. In order to choose suitable shoes for feet, the foot size and shape must be considered, so it is essential to grasp the exact size and shape of the foot. This study aims to present fundamental data on shoes' easy order prototype development for choosing shoes of good wearing comfort, by classifying feet size and shape junior high school boys in the early adolescent period. The subject were 217 Korean junior high school girls in age from 14 to 16 years old. The subjects were directly measured anthropometrically and indirectly analyzed photographically. 7 factors were extracted through factor analysis and those factors comprised 78.59% of total variance. The factors were characterized foot length, foot girth and width, foot shape around the fifth toes, foot shape around the first toes, angle of foot breadth, foot height, and foot length of upper foot. 3 clusters as their foot shape were categorized using 7 factor scores by cluster analysis. Type 1 had smaller in foot girth, width and length than other types and with deformed fifth toe. Type 2 had average size and high foot shape. Type 3 was characterized by long large foot with deformed first toe. The results would be a great support in producing and choosing appropriate shoes if forms are classified by subdividing foot form classification and extract a factor which shows only the foot sole shape.