실과교육에 대한 교사의 인식과 농업영역 실습운영

이선하(Lee Seon Ha),정오선(Joung Oh Seon) 한국실과교육학회 1998 한국실과교육학회지 Vol.11 No.2

This study was performed to analyze the reasons why practices in practical arts education had been neglected in elementary school and to propose an effective way of teaching practices in order to improve the executive ability of the students. The objectives and contents of practical arts education included in elementary school curriculum (6th revised curriculum) were analyzed through literature review, and the problems and ways of improvement in practical arts education were extracted from a statistical analysis of a survey of elementary school teachers perception. On the necessity of the practical arts education, 92.4% of the teachers recognized the importance of the practical arts education. The respondents thought that practical arts education had positive effect on executive ability, practical technique and habit formation of the students. It was suggested that practical arts courses be taught 2 class hours per week through third to sixth grades. On practices, 77.6% of the respondents thought that 40-50% of the allocated class hours should be used for practices, however, over a half of the teachers were using less than 30% of the allocated time in practices. Cultivating flowers, vegetables were the practices most frequently done in agricultural education in elementary school. Most of the teachers recognized that students were very much interested in practices. The teachers indicated that practices could not be effectively taught because of insufficient materials, preparation and time. Limitation in space, tools and equipments and budget was the major external factors hindering effective practices. Most of the teachers (94.1%) answered that they would focus on practices if possible.

과거 무기분진에 노출된 이직근로자들의 연간 폐기능 변화

이정오 ( Joung Oh Lee ),최병순 ( Byung Soon Choi ),이종성 ( Jong Seong Lee ),정지연 ( Jee Yeon Jeong ),이홍기 ( Hong Ki Lee ) 대한결핵 및 호흡기학회 2011 Tuberculosis and Respiratory Diseases Vol.71 No.5

Background: The aim of this study was to investigate annual changes in pulmonary function in workers who were exposed to inorganic dust. Methods: The subjects were 2,922 male patients who had been diagnosed with pneumoconiosis more than twice during 6 years from 2005 to 2010. Results: Of the 2,922 cases, forced vital capacity (FVC) decreased by 54 mL in 1 year. In contrast, the annual change of forced expiratory volume in one second (FEV1) decreased by 56 mL. Conclusion: This is the first study that has investigated the annual change in pulmonary function in workers exposed to inorganic dust. The results will help estimate the pulmonary condition of patients who are unable to perform a pulmonary function test due to age or a disorder.

폐기능 예측식에 따른 폐환기능 장해도 변화

이정오 ( Joung Oh Lee ),최병순 ( Byung Soon Choi ) 대한결핵 및 호흡기학회 2010 Tuberculosis and Respiratory Diseases Vol.69 No.2

Background: The aim was to estimate the differences between pulmonary disability grades according to the spirometry reference equations (the Korean equation and the Morris equation). Methods: Spirometry was performed on 16,916 male and 1,353 female special examination for pneumoconiosis, in the period of 2007~2009. Changes in predictive values for forced expiratory volume in one second (FEV1), forced vital capacity (FVC) and FEV1/FVC and in disability grade were evaluated using both equations. Results: Mean FVCs for men and women were 4,218.7 mL and 2,801.5 mL in predictive values after the application of the Korean equation, and 3,763.9 mL and 2,395.6 mL after the Morris equation, respectively. Compared with the Morris equation, the Korean equation showed 10.8% and 14.5% of excesses for men and women (p<0.001). Mean FEV1s for men and women were 3,102.5 mL and 2,107.1 mL in the Korean equation, and 2,667.8 mL and 1,699.6 mL in the Morris equation, respectively. Compared with the Morris equation, the Korean equation showed 14.0% and 19.3% of excesses for men and women (p<0.001). Men and women who showed the changes of disability grades using the Korean equation in place of the Morris equation were 23.9% (4,052/16,916) and 22.9% (311/1,353) on FVC, and 23.1% (3,913/16,916) and 10.7% (145/1,353) on FEV1. Conclusion: Applying different reference equations for spirometry has resulted in changes for disability grades in special examination for pneumoconiosis.

Impulse Oscillometry (IOS)를 이용한 무기분진 노출자에서의 기도폐쇄 연구

이정오 ( Joung Oh Lee ),이유림 ( You Lim Lee ),최병순 ( Byung Soon Choi ),이홍기 ( Hong Ki Lee ) 대한결핵 및 호흡기학회 2011 Tuberculosis and Respiratory Diseases Vol.71 No.6

Background: We tried to examine the small airway diseases which can be found early, in workers exposed to inorganic dusts. This is measured in normal breath by using the impulse oscillometry (IOS). Methods: The Pulmonary function test (forced vital capacit [FVC], forced expiratory volume in one second [FEV1], forced expiratory flow between 25% and 75% of vital capacity [FEF25-75]), IOS resistance (Rrs at 5, 10, 15, 20, 25, 35 Hz) and reactance (Xrs at 5, 10, 15, 20, 25, 35 Hz) were measured for 454 workers. The subjects were classified into 173 workers of normal (38.1%) and 281 patients with pneumoconiosis (61.9%). Results: There were significant differences between normal and patients with FVC (3.82±0.61 vs. 3.53±0.56 L), FEV1 (2.67±0.63 vs. 2.35±0.48 L), and FEF25-75 (1.88±0.95 vs. 1.47±0.80 L/sec) between groups (p<0.05). And as for IOS, there was no significant difference in resistance (Rrs) (p>0.05), and there were significant differences between normal and patients with reactance (Xrs) 15 Hz (0.003±0.05 vs. -0.006±0.04 kPa/L/s), 20 Hz (0.043±0.05 vs. 0.031±0.04 kPa/L/s), and 35 Hz (0.141±0.05 vs. 0.131±0.05 kPa/L/s) between groups (p<0.05). Conclusion: We could find out that 15 Hz, 20 Hz, and 35 Hz values of reactance were significantly influenced by pneumoconiosis. When usefulness and reproducibility to carry out the IOS are considered, it is thought that in future work will be required to draw the reference values for normal Korean persons.

초음파로 진단된 지방간의 유병율 조사 및 그 유발인자에 대한 연구

안재억,함정오,황규윤,김주자,이병국,남택승,김정순,김헌,Ahn, Jae-Eog,Ham, Jung-Oh,Hwang, Kyu-Yoon,Kim, Joo-Ja,Lee, Byung-Kook,Nam, Tack-Sung,Kim, Joung-Soon,Kim, Hun 대한예방의학회 1991 예방의학회지 Vol.24 No.2

Fatty liver is caused by derangement of fat metabolism and can be reversed by removal of contributing factors. The contributing factors of fatty liver is known to be overweight, chronic alcoholism, diabetes mellitus, malnutrition, and drug abuse such as tetracycline. This study was carried out on 1335 persons who visited 'Soon Chun Hyang Human Dock Center' from March to June 1990. In analysis of the data, prevalence of fatty liver diagnosed by ultrasonogram by age and sex, laboratory finding between fatty liver group and normal group, and odds ratio of known contributing factors, were compared. The results obtained are as following ; 1) The prevalence rate of fatty liver diagnosed by ultrasonogram is 29.6% in male and 11.5% in female. 2) Age groups with high prevalences are $40{\sim}50's$ in male (32.0%) and 50's in female (24.5%). 3) The fatty liver shows significant association with style (p<0.05), whereas not with hepatitis B-virus surface antigen (p>0.05). 4) All laboratory values except alkaline phosphatase and bilirubin are elevated significantly in accordance with the degree of fatty liver (p<0.01). 5) Fatty liver diagnosed by ultrasonogram showed so strong associations with body index, triglycerides and gamma-glutamyl transferase for males, and body index and fasting blood sugar for females that these factors may be used as supplementary data in establishing diagnosis of fatty liver. 6) Odds ratio of contributing factors are as follows ; If the odds ratio of below 29 year of age is 1.0 then that of $30{\sim}39$ is 1.74 (p=0.33), $40{\sim}49$ is 2.47 (p=0.10), $50{\sim}59$ is 2.86 (p=0.0570), over 60 is 1.81 (p=0.34). If the odds ratio of female is 1.0 then that of male is 5.67 (p<0.01). If the odds ratio of body index below zero is 1.0 then that of $0{\sim}9$ is 5.08 (p<0.01), $10{\sim}19$ is 12.37 (p<0.01), $20{\sim}29$ is 29.19 (p<0.01), 30 above is 154.02 (p<0.01). If the odds ratio of below 99 mg/dl FBS is 1.0 then that of $100{\sim}120$ is 106 (p=0.76), over 120 is 1.91 (p=0.02). If the odds ratio of below $29{\mu}/1{\gamma}-GT$ is 1.0 then that of $30{\sim}s59$ is 2.11 (p<0.01), $60{\sim}90$ is 1.87 (p<0.05), 90 above is 1.69 (p=0.15). If the odds ratio of below 149 mg/dl TG is 1.0 then $150{\sim}199$ is 1.49 (p=0.05), $200{\sim}250$ is 1.09 (P=0.77), 250 above is 2.53 (p<0.01). In summary, early diagnosis of fatty liver could be made by ultrasonogram supplemented with body index and nm triglyceride. The fatty liver could be preventive by avoiding contributing factors such as obesity, alcohol intake, high blood sugar appropriately.

리기테다소나무 F1 의 기내 소포자 배양

이욱(Uk Lee),김만조(Mahn Jo Kim),김용중(Young Joung Kim),현정오(Jung Oh Hyun) 한국산림과학회 2002 한국산림과학회지 Vol.91 No.1

N/A

Homologous 산화물 Zn_kIn₂O_3+k(k=1∼9)의 열전 특성

남윤선,최정규,홍정오,이영호,이명현,서원선,Nam, Yun-Sun,Choi, Joung-Kyu,Hong, Jeong-Oh,Lee, Young-Ho,Lee, Myung-Hyun,Seo, Won-Seon 한국재료학회 2003 한국재료학회지 Vol.13 No.8

In order to investigate the thermoelectric properties of $Zn_{k}$ $In_2$$O_{ 3+k}$ homologous compounds, the samples of $Zn_{k}$ /$In_2$$O_{3+k}$ / (k = integer between 1 and 9) were prepared by calcining the mixed powders of ZnO and $In_2$$O_3$fellowed by sintering at 1823 K for 2 hours in air, and their electrical conductivities and Seebeck coefficients were measured as a function of temperature in the range of 500 K to 1150 K. X-ray diffraction analysis of the sintered samples clarified that single-phase specimens were obtained for $Zn_{k} /$In_2$$O_{3+k}$ with k = 3, 4, 5, 7, 8, 9. Electrical conductivity of the $Zn_{k}$ $In_2$$O_{3+k}$ / decreased with increasing temperature, and decreased with increasing k for k $\geq$ 3. The Seebeck coefficient was negative at all the temperatures for all compositions, confirming that $Zn_{k}$ $In_2$$O_{3+k}$ / is an n-type semiconductor. Absolute values of the Seebeck coefficient increased linearly with increasing temperature and increased with increasing k for k $\geq$ 3. The temperature dependence of the Seebeck coefficient indicated that Z $n_{k}$I $n_2$ $O_{3+k}$ could be treated as an extrinsic degenerate semiconductor. Figure-of-merits of Z $n_{k}$I $n_2$ $O_{3+k}$ were evaluated from the measured electrical conductivity and Seebeck coefficient, and the reported thermal conductivity. Z $n_{7}$ I $n_2$ $O_{10}$ has the largest figure-of-merit over all the temperatures, and its highest value was $1.5{\times}$10$^{-4}$ $K^{-1}$ at 1145 K.5 K.

철도역사 전력제어설비 통합관리 시스템 구축에 관한 연구

김종락(Jong-Rak Kim),이광재(Kwang-Jae Lee),성동일(Dong-IL Sung),박시범(Si-Bum Park),이민규(Min-Gyu Lee),서우석(Woo-Seok Seo),박태기(Tae-Gi Park),이정오(Joung-Oh Lee) 한국철도학회 2022 한국철도학회 학술발표대회논문집 Vol.2022 No.4

합성수지 반제품 생산 공장에서 발생한 반응성 기도과민 증후군

박소영,이종성,김부욱,이정오,박규철,최병순 大韓産業醫學會 2008 대한직업환경의학회지 Vol.20 No.4

배경 직업성 천식 감시체계의 활성으로 국내 직업성 천식의 보고가 증가하였음에도 불구하고 전체 직업성 천식의 약 5-18%를 차지한다고 알려진 반응성 기도과민증후군의 보고는 많지 않다 이에 저자들은 합성수지 반제품을 생산하는 사업장에서 발생한 반응성 기도과민 증후군 사례를 발견하였기에 이를 보고하는 바이다 증례 평소 건강하던 61세 남자 환자는 40세 때인 1987년부터 약 20년 간 합성수지 반제품을 생산하는 사업장에서 배합작업을 하였다 2007년 8월 PVC(polyvinyl chloride) DEHP (d₁-(2-ethylhexyl)phthalate) dibutyl tin maleate epoxidized soybean oil 등의 원료를 혼합하는 기계의 가열로 작업장내 연기가 자욱하게 된 사고가 발생한 직후 환자는 기침 콧물 호흡곤란 천명 등의 증상을 보였다 폐기능 검사에서는 FEV₁ 1.63 L(50%) FVC 3.81 L(82%) FEV₁/FVC 43% 소견을 보였으며 기관지 확장제 투여 후 FEV₁은 1.80 L로 투여 전에 비해 170 ml 10.4% 증가하였다 흡입용 스테로이드 및 기관지 확장제를 포함한 치료 시행 7개월 후에는 FEV₁ 3.21 L(99.3%) FVC 6.56 L(143.5%)로 회복되었으며 메타콜린 기관지 유발검사에서는 음성이었다 결론 혼합기 가열로 인해 발생한 원료물질 자체 또는 이들의 열분해산물에 고농도로 노출되면서 RADS가 발생한 것으로 판단된다. Background Reactive airways dysfunction syndrome (RADS). which represents between 5% and 18% of new-onset, work-related asthma remains underreported in spite of increasing reports of occupational asthma cases through occupational asthma surveillance in Korea We report a 61-year-old male who developed RADS after exposure to a high level of toxic gases from a workplace accident. Case The patient who had worked for 21 years at a PVC manufacture factory and had retained good health until Aug 22, 2007, when he was exposed to PVC (Polyvinyl chloride) DEHP (D₁ (2-Ethylhexyl) Phthalate) dibutyl tin maleate and epoxidized soybean oil gases from a heated mixer. Within several minutes of exposure, he developed coughing rhinorrhea dyspnea and wheezing. Pulmonary function tests (PFTs) showed an FVC of 3.81 L(82% of predicted) FEV₁ of 1.63 L/s (50% of predicted) FEV₁/FVC% of 43 % and FEV₁ of 1.80 L/s that increased by 170 ml and 10.4% in response to bronchodilator. After 7 months of treatment with inhaled steroids and bronchodilators, repeat PFTs showed an FVC of 6.56L(143.5% of predicted) FEV₁ of 3.21 L(99.3% of predicted) and FEV₁/FVC% of 48.9%. A methacholine challenge test was negative at a concentration of 25 ㎎/ml. Conclusion RADS occurred due to exposure to raw material vapors or their thermal decomposition products.