석탄회를 이용한 중금속 혼합용액중의 Fe와 Zn성분분리

유정근 한서대학교 산학협력연구원 부설 환경연구소 1988 환경연구소 논문집 Vol.1 No.-

Power plant using coal generate a large amount of fly ash as waste metters. The conventional effective utilization methods for coal fly ash have been materials but the most of it has been disposed by dumping therefore this give rise to environmental pollution seriously. The objective of this study is find the possibility of waste fly ash being absorbent for the separation of Fe, Zn components in solution. It is found out fly ash is more effective absorbent than activated carbon for the seperation of Fe components from sample solution consist of Zn, Fe components. For the solution of 100ppm concentration of Fe and Zn respectively, at 30min of absorption time 99% of Fe components are removed by fly ash, while only 2% of Zn components are removed.

고분자물질충진제로서 석탄회의 활용에 관한 연구

유정근 한서대학교 산학협력연구원 부설 환경연구소 1999 환경연구소 논문집 Vol.2 No.-

본 연구는 발전소에서 배출되는 석탄회에 대해 고분자물질 충전제로의 활용가능성에 대해 조사하였다. Polypropylene 수지에 석탄회의 입도를 35㎛, 70㎛로 조절한 후 충전제로 각각 사용하여 시편을 제조한 뒤, 이를 이용하여 MI, FM, ASH, IZOD, 인장강도, 신율등의 물성을 측정하였다. 또 한편 기존에 사용되고 있는 충진제인 talc를 사용하여 같은 시편을 제조한 뒤, 역시 앞서의 물성들을 측정한 후 이들을 비교해 봄으로서 기존의 충진제대용으로서 석탄회의 활용가능성을 알아보고자 하였다. This study is investigated the possibility of using power plant fly ash as polymer fillers. Two kind of fly ash, 70㎛, 35㎛ of average particle size, are test for comparing physical. Properties, MI, FM, ASH, IZOD, Strength, Ductility, with talc filler used in industries. Polypropylene resins are used to make samples for this test. Polypropylene resins are mixed with 5 wt% fly ash or 5 wt% talc and the product sample are carried for tes of physical properties. In results, the experiments showed that fly ash can be used as fillers for high grad polymer product especially. can replace talc filler.

태권도 수련생의 상해실태 및 예방에 관한 연구

유근직,정억순 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.4

The purpose of this study was to investigate the injury status and its prevention of students attending Taekwondo school. In order to do so, during the two weeks(from on 1st of July to 13th of July) 440 students attending Taekwondo academy in the four cities of Kangwon district was surveyed as subjects. The original questionnaire was developed by BC. Jeong(2000). The researcher modified the questionnaire based on it modified by NH. Park(2003). Pilot study was conducted on 35 students attending KR Taekwondo academy to measure the validity or the instrument. In this study the researcher used Person product monent correlation coefficient, or Pearson's r to test the correlation between test and retest for continuous variables. For nominal variables, percent agreement was calculated. The results of the test are as follows: for the Likert scale of the safety measures, r=.728, for the Likert scale of the safety instruction, r=.825 and for the variable of the number of incidents, r=.705. The used statistical methods for the data analysis were descriptive statistics. The major findings obtained from this study were as follows: First, students learning Taekwondo were generally trained in case of preliminary exercise. However, during the spa, the partner's age, height, were Taekwondo skill were so different that the students experienced sports injuries. Second, Taekwondo instructors generally educated safety instruction, After the students were injured, they rapidly and correctly took measures the injuries and incidents. Third, ankles, legs, toes, wrists, fingers, arms were frequently injured during the training in the Taekwondo school. In order to prevent or minimize these kinds of injuries, the following measures are absolutely needed: enough preliminary exercise and cool down exercise, wearing guard, increasing spa skills and physical strength etc.

태권도장의 효율적 경영을 위한 제품 및 서비스 포지셔닝 전략

유근직,정억순 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.4

The purpose of this study was to investigate the level of products and services positioning from Taekwondo school, to find and to correctly modify the these factors with which the students were not satisfied in order for the Taekwondo school to be effectively managed. In order to do so, during the three weeks(from the end of June to the middle of the July) 400 students attending Taekwondo academy in the four cities of Kangwon district was surveyed as subjects. The researcher modified the questionnaire developed by E.J. Lee(2001). Pilot study was conducted on 35 students attending KN Taekwondo academy to measure the validity of the instrument, and Cronbach's α was used to measure reliability of it. The reliability coeffcient for it was found to be α=.703-.850. In order to measure the level of products and services positioning offered from the Taekwondo school, a five point Likert Scale was used. The used statistical methods for the data analysis were descriptive statistics, t-test, One-way ANOVA, and multiple regression analysis. For all analysis of the research questions, an alpha level of .05 was used. The major findings obtained from this study were as follows: First, in relation to the level of sympathy and distinction factors, there was statistically differences between male and female students, that is, male students were more correctly positioned than female. Second, in connection with the materiality, sympathy and distinction factors, there was statistically significant differences between city students and local students, that is, local students were more correctly positioned than city students. Third, among all of the factors; materiality, response, sympathy, reliability, and distinction, there was no significant differences among the duration of Taekwondo training and level of school. Fourth, response, sympathy, and distinction factors significantly influenced the current students attending Taekwondo school to continually attend it.

제2형 당뇨병 환자에게 적용한 표준진료지침이 혈당, 당화혈색소, 당뇨지식 및 재원일수에 미치는 효과

김희승,윤건호,유양숙,오정아,송민선,신미옥,김경희,송복례 대한당뇨병학회 2002 임상당뇨병 Vol.3 No.1

연구배경 : 당뇨병 환자의 평균 재원기간을 단축시키고, 제한된 입원기간 내에서 질적인 면과 비용효과성을 고려한 총체적인 건강관리체계의 필요성이 요구됨으로써 생겨난 것이 당뇨병 표준진료지침(Critical Pathway: CP)이다. 현재 개발된 당뇨병 CP를 통한 진료가 환자의 당뇨병에 관한 지식을 개선시키고 이에 따라 장기적으로 당뇨병 환자의 혈당조절이 개선되었다는 과학적인 검증은 당뇨병 CP를 여러 병원에 정착시키기이전에 반드시 선행되어야 할 과제이다. 이에 본 연구는 2000년 3월부터 1년간 강남성모병원에 입원하는 당뇨병 환자를 대상으로 현재 개발된 1주일 CP를 적용한 실험군의 혈당, 당뇨병 관련 지식 및 재원일수가 대조군에 비하여 차이가 있는지를 조사하였다. 방법 : 1주일 CP를 적용한 실험군은 내과병동에 입원한 당뇨병 환자 89명이었고, 대조군은 기타병동에 입원한 당뇨병 환자 22명이었으며 CP를 적용하지 않았다. CP를 적용하기 전인 입원시에 실험군과 대조군의 공복혈당, 식후 2시간혈당, 당화혈색소 및 당뇨관련 지식을 측정하였고, 퇴원 시에 실험군과 대조군에게 공복혈당과 당뇨관련 지식을 재측정하고 재원일수를 파악하였다. 그리고 두 군에게 퇴원 3개월 후의 공복혈당, 식후 2시간 혈당 및 당화혈색소를 조사하였다. 결과 : 1) 실험군의 공복혈당은 입원 시 238.7: 1) 실험군의 공복혈당은 입원 시 238.7mg/dL에서 퇴원 시 139.4mg/dL로 감소하는 경향이었으나 퇴원 3개월 후에는 150.6mg/dL로 약간상승하는 경향을 보였다. 대조군은 입원 시 251.5mg/dL에서 퇴원 시 136.2mg/dL로 감소하는 경향이었으나, 퇴원 3개월 후에는 219.3mg/dL로 현저히 증가하는 경향이었다. 2) 실험군의 입원 시 식후 2시간 혈당은 312.5mg/dL에서 퇴원 3개월 후 248.5mg/dL로 감소하는 경향이었다. 대조군도 입원 시 식후 2시간 혈당이 300.1mg/dL에서 퇴원 3개월 후 262.5mg/dL로 감소하는 경향이었으나 실험군보다 감소의 폭이 적은 경향이었다. 3) 실험군과 대조군의 입원 시 당화혈색소는 각각 10.3%와 9.7%로 유의한 차이가 없었으나,퇴원 3개월 후 실험군은 7.5%로 대조군의 9.1% 보다 유의하게 감소하였다. 4) 실험군의 입원 시 당뇨지식 점수는 실험군이 12.1점 대조군은 12.0점으로 유의한 차이가 없었으나 퇴원 시는 실험군이 15.5점으로 대조군의 14.6점 보다 높은 경향이었다. 5) 재원일수는 실험군이 8.4일로 대조군의11.0일 보다 유의하게 적었다. 결론 : 따라서 당뇨병 환자를 위한 CP는 재원일수의 감소뿐만 아니라 환자의 자가관리에 대한 체계적인 교육과 개선의 기회를 가짐으로써 장기적인 혈당 조절의 향상을 도모할 수 있는 효과적인 방법이라고 생각한다. Background: The aim of this study was to examine the effects of the critical pathway for the admitted patients with type 2 dia betes me llitus on glycemic control, the knowledge on the disease, and the length of hospital stay. Methods: 89 diabetic in-patients were applied with the 1 week critical pathwa which was consisted of intensive education program for self-management of diabetes me llitus such as glucose monitoring, excercise prescription, diet control, self-a djustment of the drugs and so on. The results were compared with 22 diabetic inpatients who were treated with conventional way. We assessed the effects of critical pathway on the degree of glycemic control, the knowledge on the disease, and the length of hospital stay. Results: Although fasting and postprandial 2 hours blood g lucose levels did not showed sta tistically significantd ifference between critical pathway group and conventional group on discharge , HbA1c was significantly decreased in critical pathwa group compared with the conventional group (7.5±1.8% vs 9.1±2.6%) on 3 months after discharge . Knowledge on the disease tended to increase in critical pathway group compared with the conventional group on discharge. The Length of hospital stay was significantly decreased in critical pathway group compared with the conventional group (8.4±2.8day vs 11.0±3.9da ) Conclusion: These results showed that critical pathway for the patients with diabetes mellitus might be a usefulway for improving the long term glycemic control through motivation, enhancing the knowledge on the disase as well as reducing the length of hospital stay.

흉부 X선촬영 기술의 변천에 관한 연구

이창엽,조평곤,김지닐,최소영,김창균,최종학,김정민,김유현 高麗大學校 倂設 保健大學 保健科學硏究所 2002 保健科學論集 Vol.28 No.2

To find elements which enable improving Quality of image of chest radiography, we attempted to make comparison between chest radiography used currently with that of the past, and following conclusion was reached: 1) It could be confirmed that a dependance on chest radiography was declining, because proportion of chest radiography against overall radiography decreased. 2) There was a change of kVp to a high voltage in a chest radiography, and use of high kVp became a generalization 3) Exposure time was reduced and exposure dose was curtailed accordingly. 4) Apparatus was mainly comprised of 3-phase rectifier circuit and inverter type. 5) It could be confirmed that frequency of applying additional filters for high kVp radiography was insufficient. 6) There was almost no difference in the condition of exposure between hospitals using film/screen and hospitals using CR. But when CR is used for radiography, it was increase in exposure dose due to increase in tube current and it will be necessary to have continuous study on exposure dose by an increase use of CR in the future.

그레이브스병에서 방사성 요오드 치료에 따른 갑상선 자극 호르몬 수용체 결합억제 면역글로불린(Thyrotropin Binding Inhibitory Immunoglobulin, TBII)의 변화

조영석,권기현,이준철,나소영,이효진,홍우정,이유선,김군순,송민호,김영건,노흥규 충남대학교 의학연구소 2003 충남의대잡지 Vol.30 No.2

Prediction of thrapeutic response to radioiodine in Graves' disease is poorly understood. Although thyrotropin binding inhibitor immunoglobulin(TBII) level is a strong index for relapse after antithyroid drug medication, conflicting results are reported regarding its prognostic significance in Graves' disease treated with RAI. This study is dengned to evaluate possible relationship between post-treatment hypothyroidism and TBII in Graves' disease treated with RAI. Fourty two patient with Graves' disease after radioiodine treatment were studied retrospectively. The subject were divided into hypothyroid group and euthyroid or hyperthyroid group. We evaluated the association of hypothyroidism and TBII with radioiodine treatment dose. The mean age of hypothyroid group was 48±11 years and euthyroid or hyperthyroid group was 47±12 years. There was no difference in two groups. And there was no significant difference in post- treatment TBII between two groups(49.9±28.5%, 29.9±14.3%, p-value >0.05). The treatment-dose had no influence on post-treatment thyroid state. Euthyroid or hyperthyroid group was done with 13.6±6.9mCi and hypothyroid group was 17.0±10.4mCi(p-value > 0.05). TBII had no prognostic significance on long-term hypothyrodism in Graves' disease treated with radioiodine. And, treatment-dose had no influence on post-treatment thyroid state.

Analysis of the Performance of a Rotary Cooler

Jeong-Kun Yoo,Chul-Kyun Chun,Man-Seung Lee,Hea Kyung Park 한국공업화학회 2003 Journal of Industrial and Engineering Chemistry Vol.9 No.4

SO₂ gas 및 폐기물 Jarosite 가 생성되지 않는 새로운 Zn 제련 공정에 관한 연구

유정근(Jeong Kun Yoo),유영홍(Young Hong Ryoo),최승훈(Sung Hoon Choi),이홍길(Hong Ghil Lee),이철태(Chul Tae Lee) 大韓環境工學會 1993 대한환경공학회지 Vol.15 No.2

석탄회를 이용한 중금속 혼합용액중의 Fe 와 Zn 성분 분리

유정근(Jeong Kun Yoo),최승훈(Seung Hoon Choi),이만승(Man Seung Lee) 大韓環境工學會 2001 대한환경공학회지 Vol.23 No.10