지방부 신호교차로 사고특성분석 및 모형개발

박병호(Park, Byeong-Ho),유두선(Yu, Du-Seon),양정모(Yang, Jeong-Mo),김원호(Kim, Won-Ho) 대한교통학회 2007 대한교통학회 학술대회지 Vol.57 No.-

교통이란 주체되는 사람이나 물건을 이동수단을 통해 도로시설을 활용하여 이동하게 되는 일련의 모든 행위 를 일컫는다. 이러한 교통은 해당지역의 지역적 특성 및 토지 이용에 따라 차종 및 차량의 통행특성 도로의 기하구조 등 도로여건 및 운영적 특성이 변하게 된다. 일반적으로 지역은 인구 및 건물의 밀집정도, 취락현황 등의 인문·사회적 형태에 따라 도시부와 지방부로 구분된다. 이는 세부적으로 주거, 상업, 공업, 농업지역 등과 같이 지역적 특성에 따라 여러 종류로 분류할 수 있다. 이러한 지역적 특성은 교통행태에도 영향을 미치게 된다. 따라서 차량의 차종, 통행특성, 도로의 기하구조, 신호처리형태 등은 지역에 따라 많은 차이를 갖게 되는 것이다.

항공수요 재배분 시나리오에 의한 접근비용 분석

김윤환(Kim, Yun-Hwan),유두선(Yu, Du-Seon),박병호(Park, Byeong-Ho) 대한교통학회 2007 대한교통학회 학술대회지 Vol.56 No.-

청주공항은 1997년 개항 직후 IMF 외환위기 이후 국제노선이 폐지되는 등 그 위기를 극복하고 현재 지속적인 항공수요의 성장을 거듭해오고 있다. 하지만 국제공항으로써 항공수요 규모의 현실은 아직 미약한 것으로 판단된다. 본 연구는 청주국제공항을 중심으로 항공수요 재배분 시나리오에 의한 수요분석을 통하여 청주국제공항의 항공수요 증대 방안의 기초논리를 정립하고자 하였다.

도로환경요인과 교통사고의 상관성분석 및 사고예측모형 개발

박정순(Park, Jeong-Sun),김태영(Kim, Tae-Yeong),유두선(Yu, Du-Seon) 대한교통학회 2006 대한교통학회 학술대회지 Vol.53 No.-

2004년도 한 해 동안 우리나라에서 일어난 총 교통사고건수는 220,755건이며, 그 중에서 교차로 사고는 25.9%인 57,268건이 발생하였다. 청주시에서는 전체 교통사고건수 3,115건 중 교차로에서 발생한 교통사고는 51.1%에 해당하는 1,592건이 발생하였으며, 이중 신호교차로에서는 1,474건이 일어났다. 이는 신호교차로 사고가 전체 사고에 비교적 많은 영향을 주고 있으며 교차로 안전에 대한 정책수립이 시급하다는 것을 보여주고 있다. 기존 신호교차로의 안전에 관한 연구들은 대부분 사고의 통계적 분석을 통하여 사고분석과 안전의 관계를 조명하는데 중점을 두어 왔으나 이러한 분석들은 자료 자체의 부족과 정확도, 신뢰도 부족으로 인해 사고감소를 위한 대응책 마련에는 효과적인 도움을 주지 못하고 있다. 본 연구는 교통사고와 도로환경을 구성하는 각 요소들과의 영향도 분석을 통해 우리나라 신호교차로의 실정에 맞는 사고 예측 모형을 개발하여 신호교차로의 안전성을 높이며 교차로 운영상 교통사고를 감소시키는데 그 목적이 있다. 이러한 연구목적을 수행하기 위하여 기하구조와 교통운영과 같은 도로환경적 요인과 교차로의 상관된 여러 조건들을 분석하여 교차로에서 교통사고가 일어나는 원인을 규명하고, 교차로 위험순위에 따른 적절한 대비책을 마련하기 위한 4지 신호교차로 교통사고 예측모형을 개발하고자 한다.

유치원 아동이 그린 치과의사 그림의 주조색과 아동의 치과불안도의 연관성에 관한 연구

유두선,이광희 원광대학교 치의학연구소 1996 圓光齒醫學 Vol.6 No.3

This study was done as a pilot study to develop a color test measuring children's dental anxiety. The subjects of study were 511 preschool children aged from 3 to 6. Caries experience was examined. Children's drawings of the dentist were collected and analyzed by the method of human figure drawing test modified by Sonnenberg and Venham. Colors of high dental anxiety level were black, brown, purple, red, yellow, pink, green, orange, blue, gray, yellow ochre, and white in that order. Colors of high frequency of use were yellow ochre, green, blue, red, orange, pink, black & purple, yellow, brown, gray, and white in that order. As the age increased, white & gray, yellow ochre, and blue increased and black, purple, and pink decreased. Boys liked green and blue, and girls liked orange and yellow. Filled teeth rate was highest in yellow ochre group and very low in black group. Children who had an educational dental visit before the test used green color more than the rest of children.

미취학 아동의 우유병 우식증 유병률과 세균학적 우식활성도에 관한 연구

유두선,이광희 원광대학교 치의학연구소 1994 圓光齒醫學 Vol.4 No.1

The purpose of study was to survey the prevalence of the nursing bottle caries and bacteriologic caries activity in preschool children. Dental caries experience of 690 preschool children in Iri city and Cheonju city was examined. Subjects were grouped by the pattern of their caries experience : Group 1 - no caries, Group 2 - no caries in the upper arch, Group 3 - no caries among the upper incisors, Group 4 - draft in the lower arch dmft in the upper arch, Group 5 - dmft among the upper posterior teeth> dmft among the upper incisors, Group 6 - the rest. Groups 5 and 6 were regarded as the group which had experienced nursing bottle caries. The prevalence of the nursing bottle caries of the present study was 15.6%(4.6% for Group 5 and 11.0% for Group 6). dmft index of Group 5 was 9.16 and the highest, and the next was 7.89 of Group 6. The prevalence of the individual tooth in Group 6 was in order as follows : the upper incisors, the lower posterior teeth, the upper posterior teeth, the upper cuspids, the lower cuspids, the lower incisors. The prevalence of the upper central incisors was the highest(89.5 - 94.7%), and that of the lower central incisors was the lowest(1.3%). The composition of the bacteriological caries activity test medium was 20% sucrose, 2% tryptose, 0.5% sodium chloride, 5% bromcresol green solution, 0.213 units/ml bacitracin. The medium was inoculated by the dental plaque and incubated for 72 hours and the pH was measured after 48 hours and 72 hours. Although Groups 5 and 6 showed the high caries activity tendency, there was no significant difference among the groups.

미취학 아동의 우유병 우식증 유병률과 세균학적 우식활성도에 관한 연구

이광희,유두선 大韓小兒齒科學會 1994 大韓小兒齒科學會誌 Vol.21 No.1

The purpose of study was to survey the prevalence of the nursing bottle caries and bacteriologic caries activity in preschool children. Dental caries experience of 690 preschool children in Iri city and Cheonju city was examined. Subjects were grouped by the pattern of their caries experience: Group 1-no caries, Group 2-no caries in the upper arch,Group 3-no caries among the upper incisors, Group 4-dmft in the lower arch ?? dmft in upper arch, Group 5-dmft among the upper posterior teeth > dmft among the upper incisor, Group 6- the rest, Groups 5 and 6 were regarded as the group which had experienced nursing bottle caries. The prevalence of the nursing bottle caries of the present study was 15.6% (4.6% for Group 5 and 11.0% for Group 6). dmft index of Group5 was 9.16 and the highest, and the next was 7.89 of Group 6. The prevalence of the individual tooth in Group 6 was in order as follows: the upper incisors, the lower posterior teeth the upper posterior teeth, the upper cuspids, the lower incisors. The prevalence of the upper central incisors was the highest (89.5-94.7%), and that of the lower central incisor was the lowest (1.3%). The composition of the bacteriological caries activity test medium was 20% sucrose, 2% tryptose, 0.5% sodium chloride, 5% bromcresol green solution, 0.213 units/ml bacitracin. The medium was incubated by the dental plaque and incubated for 72 hours and the PH was measured after 48 hours and 72 hours. Although Groups 5 and 6 showed the high caries activity tendency, there was no significant difference among the group.

불화석 용액내 불소농도의 장기변화와 첨가물의 영향에 관한 실험적 연구

유두선,이광희,최윤주,김대업 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.2

The purpose of this study were to measure the solubility of the stannous fluoride experimentally,to find a method for improving the solubility of the stannous fluoride,and to observe the effect of longterm storage of the variation of the concentration of fluoride in the stannous fluoride solutions.By adding such materials as antiseptics,dye,flavor,and tests to solution,the variation of the fluoride concentration was also observed. Ten groups of 0.4% stannous fluoride solutions to which glycerine,sodium chloride,chlorhexidine,dye,flavor,xylitol,and sorbitol were added were prepared.The measurements were carried out by direct calibration. The obtained results were as follows. 1.Effect of adding glycerine as solvent:This solubility of the stannous fluoride increased in the case of adding glycerine.By increasing the glycerin concentration,the fluoride level in stannous fluoride solution also increased. 2.Effect of adding sodium chloride and chlorhexidine.:Comparing to the case of pure water,low fluoride level was measured in case of adding sodium chlorid and high fluoride level was measured in case of adding chlorhexidine. 3.Effect of adding erythrosin as dye and banna essence as flavor.:Adding erythrosin and banna essence didn't affect fluoride level. 4.Effect of adding xylitol and sorbitol.:The effects of xylitol and sorbitol were nearly the same as the effect of adding erythrosin and banna essence.