축광 노면표시의 재귀반사도 및 휘도 성능 평가에 대한 연구

이용문,김경수,김상태,김흥래 한국도로학회 2016 한국도로학회 학술발표회 논문집 Vol.2016 No.06

교통안전시설물은 도로 이용자가 필요로 하는 정보를 사전에 전달하고, 또한 행동을 동일하게 통제함으 로서 도로상의 안전 확보 및 교통 소통을 증진하는 시설이다. 교통안전시설 중 선으로 표시하는 중앙선, 구분선 등의 차선은 운전자에게 진로 및 도로선형 등의 시각적인 정보를 제공함으로써 운전자의 안전하고 편리한 운행을 돕는 중요한 역할을 한다. 최근 야간에 차선이 보이지 않아 운전자들의 야간 주행안전성이 문제가 되고 있다. 이와 같은 야간 주행 문제는 최근 3년간 야간 교통사고 사망자 수가 전체 사망자 수의 52.8%로 절반 이상을 차지할 만큼 대안 마련이 필요한 실정이다. 노면표시의 시인성은 자동차 전조등에서 나오는 빛을 유리알에 의해 재귀반사 함으로써 이루어진다. 하지만 유리알에 의한 재귀반사는 전조등 거리 에 따른 시인거리에 한계가 있고, 전조등 빛이 닿지 않는 구간인 굴곡이 심한 산지부 도로나 커브가 있는 회전구간에서 시인거리가 극히 제한될 수밖에 없다. 해외에서 주로 연구되고 있는 축광 노면표시는 재귀반 사 방식의 한계를 극복할 수 있고, 조명시설이 부족한 구간에 설치 시 야간 주행안전성을 향상시킬 수 있 다. 하지만, 대부분 축광에 의해 도료 자체에서 방출되는 빛만을 이용하여 시인성을 확보하는 기술로 자동 차의 전조등이 비추는 영역에서는 축광에 의한 시인성 효과를 얻기가 어렵다. 따라서 본 연구에서는 축광 노면표시에 유리알을 살포하여 자동차 전조등이 비추는 근거리에서는 재귀반사를 통한 시인성을 확보하 고, 원거리에서는 축광에 의한 시인성을 확보할 수 있는 축광 노면표시 개발을 위한 기초실험을 하고자 한 다. 이를 위해 유리알 성능과 노면표시 두께에 따른 축광 노면표시의 재귀반사도 및 휘도 성능을 비교・분 석하였고, 본 연구 결과는 향후 축광 노면표시 개발에 필요한 기초자료로 활용할 수 있다. 본 연구에서는 축광 노면표시에 유리알을 살포하여 재귀반사와 휘도를 동시에 얻을 수 있는 노면표시 개발을 위한 기초실험을 수행하였다. 본 연구를 수행하며 도출한 결론은 다음과 같다. 1. 축광 노면표시 의 색도는「KS M 6080」기준을 만족하는 것으로 나타났다. 2. 축광 노면표시의 건조상태 재귀반사 실험 결과, 축광 노면표시에 유리알 살포시 경찰청 재귀반사 기준인 240 mcd/(㎡・Lux)를 모두 만족하는 것으 로 나타났다. 습윤상태 재귀반사 실험 결과도 유리알 1종 1호를 제외한 유리알 1종 3호와 2종 1호를 살포 한 축광 노면표시 시편은 경찰청 우천시 재귀반사 기준인 100mcd/(㎡・Lux)를 만족하는 것으로 나타났 다. 이에 따라 축광 노면표시에서도 유리알 살포시 자동차 전조등에 의한 재귀반사로 근거리 시인성 확보 가 가능할 것으로 판단된다. 3. 축광 노면표시는 일반 노면표시에 비해 유리알을 살포하지 않아도 도료 자체적으로 건조상태 재귀반사 성능이 높은 것으로 나타났다. 이는 축광 노면표시 도료가 자체적으로 빛 을 발산하기 때문인 것으로 판단된다. 4. 축광 노면표시에 유리알 살포시 축광 성능이 개선됨을 확인하였 고, 유리알 굴절률이 높아질수록 휘도 값이 증가하는 것으로 나타났다. 또한 축광 노면표시의 두께가 두 꺼워질수록 휘도가 증가하긴 하지만 일정수준 이상으로 두께가 증가할 경우 축광 성능이 포화되어 더 이 상 휘도가 증가하지 않는 것으로 나타났다.

SPME를 이용한 저먼캐모마일과 감국 꽃의 휘발성 향기성분 비교

이용문,문정섭,안송희,양진호,김동원,안민실 한국약용작물학회 2018 한국약용작물학술대회 발표집 Vol.2018 No.10

Background : Matricaria recutita and Dendranthema indicum are known to have effects such as antioxidant and antihypertensive effects, and they are used as processed food materials. Therefore, it is necessary to examine the possibilities as a natural material for cosmetics. This study was carried out to analyze the volatile flavor components of flowers during cultivation in order to examine the possibility of cosmetics using M. recutita and D. indicum. Methods and Results : This experiment was carried out from April to October, 2017 at Unbong-eup (500 m above sea level) in Namwon, Jeollabuk-do. M. recutita and D. indicum were planted in late May. Then, flowers were collected in October and volatile flavor components were analyzed by Solid Phase Micro Extraction (SPME) method. Samples of flowers for component analysis were weighed in 0.4 g each and placed in a 20 ㎖ vial. GC/MS was used with Agilent Technologies 7890A/5975C (Agilent, USA). Column and carrier gas were DB-5MS (30 m × 0.25 ㎜ × 0.25 ㎛) and helium gas, respectively. As a result of the analysis of M. recutita flowers, we identified a total of 24 components. The major flavor components were mono terpenes and ketones. The main compounds were β-ocimene (24.08%), artemisia ketone (22.82%), γ-terpinene (16.65%), cis-3-hexenyl isovalerate (3.92%), artemisiatriene (3.72%) and O-cymene (3.44%). As a result of analyzing the composition of D. indicum flower, we identified 33 kinds of ingredients. The major flavor components were monoterpenes and sesquiterpenes. The main compounds were sabinene (19.67%), trans-oiperitol (13.22%), α-phellandrene (10.05%), myrcene (7.53%), cineole (4.36%), α-terpinene (3.60%) and trans-ocimene (3.57%). Conclusion : We identified 24 flavor components and 33 flavor components in flower of M. recutita and D. indicum, respectively. Eight of the identified or estimated compounds were common to both samples. The reason why the flavor components kinds of M. recutita flowers were few was thought to be due to the influence of collection time. The main flowering period of M. recutita and D. indicum were May and October, respectively, but the use of the samples collected in October seemed to have influenced.

찔레와 자소엽의 지대별 광합성속도 및 지표성분 비교

이용문,문정섭,안송희,양진호,김동원,안민실 한국약용작물학회 2018 한국약용작물학술대회 발표집 Vol.2018 No.10

Background : This study was carried out to investigate the possibility of cosmetics materials by comparing growth characteristics, photosynthetic rate and major functional components of Rosa multiflora and Perilla frutescens at different altitudes. Methods and Results : This experiment is being carried out in April 2018 in Namwon (500 m above sea level) and Iksan (15 m above sea level) in Jeollabuk-do. The growth characteristics of R. multiflora were investigated at the end of May. Flowers were collected at this time and used as samples for functional analysis. The growth characteristics of P. frutescens were investigated in the middle of August and the ground part was collected at this time and used as a sample for functional analysis. Photosynthetic rates were measured using LCpro+ (ADC, UK). The marker compound were investigated and analyzed using HPLC Alliance e2695 and 2998 PDA detector (Waters, USA). Photosynthetic rate (based on 1,600 μ mole of light intensity) was measured in mid-June as follows. The R. multiflora showed 9.8 μ mole․CO2/㎡/s in Iksan and 7.9 μmole․CO2/㎡/s in Namwon. The P. frutescens showed 15.0 μmole․CO2/㎡/s in Iksan and 8.8 μmole․CO2/㎡/s in Namwon. Overall, Photosynthetic rate was higher in Iksan. As a result of analyzing 18 kinds of marker compound, gallic acid and astragalin were found in R. multiflora, caffeic acid and rosmarinic acid were found in P. frutescens. Gallic acid and Astragalin of R. multiflora showed 5.4 ㎎/g and 28.4 ㎎/g in Iksan and 3.2 ㎎/g and 21.6 ㎎/g in Namwon, respectively. Caffeic acid and rosmarinic acid of P. frutescens were 2.7 ㎎/g and 49.7 ㎎/g in Iksan and 2.5 ㎎/g and 33.6 ㎎/g in Namwon, respectively. Conclusion : Comparing the yield of the harvesting parts by region, both R. multiflora and P. frutescens was higher in Namwon. As a result of quantitative analysis of four detected elements of gallic acid, astragalin, caffeic acid and rosmarinic acid, all four components were high in Iksan. It is considered that this is due to optical environment difference.

E×B필터에 의한 갈륨 이온빔의 동위원소 분리 및 에너지 특성 분석

이용문,최복기,이준호,이동석,김영권,최은하,서윤호,조광섭,강승언 한국진공학회 1996 한국진공학회 학술발표회초록집 Vol.- No.-

이조사회의 구조적 변화에 관한 한 연구 -임술민란의 이해를 위한 시고-

이용문 연세대학교 사회발전연구소 1977 연세사회학 Vol.2 No.-

간성혼수 (Hepatic Encephalopathy) 에 있어서 이완시간과 Spectrum의 관계에 대한 고찰

이용문,서대건,이관섭,김건중 대한자기공명기술학회 1999 대한자기공명기술학회지 Vol.9 No.-

인삼 하우스 재배 시 피복자재별 생육특성 및 광합성 비교

이용문,서상영,박은석,김창수,김효진,김희준,권기범 한국약용작물학회 2018 한국약용작물학술대회 발표집 Vol.2018 No.05

Background : This study was carried out to investigate the differences of growth characteristics, photosynthetic rate and ginsenoside content of Panax ginseng C. A. Meyer according to the covering materials during house cultivation. Also the results of this study will be used as basic data for the standardization of ginseng house cultivation. Methods and Results : This experiment site was conducted from March to October, 2017 in the house located in Jinan - gun, Jeollabuk-do. The ginseng cultivar used in the experiment was a violet stem variant of 4-years-old. There are three kinds of covering materials used in the experiments: polyethylene (PE) film, scattering film, and blue-white film. PE film and the scattering film were first coated with 85% of light shielding net after the first installation, and then secondly coated with 75% and 30% of the light shielding net respectively in the middle of May when the house temperature reached 25℃. The blue-white film was cultivated after the initial installation without further treatment. The light transmittance of each covering materials were in the order of scattering film (14.5 ± 1.5%), blue-white film (10.0 ± 1.0%) and PE film (6.7 ± 1.0%). The average photosynthetic rate of each treatment was in the order of scattering film (2.94 μmol CO2/㎡/s), blue film (2.71 μmol CO2/㎡/s) and PE film (2.34 μmol CO2/㎡/s). Aboveground growth characteristics of ginseng were good in a scattering film and blue-white film. Root weights were found in the order of scattering film (47.1 g/plant) > blue-green film (41.3 g/plant) > PE film (37.6 g/plant). Conclusion : In order to select proper covering materials for ginseng house cultivation, the growth and photosynthetic characteristics of each treatment were compared with each other in order of scattering film, blue-white film and PE film. The photosynthetic rate of each treatment was measured according to the growing season. PE film was relatively low during the entire growth period. In the case of scattering film and blue-white film, the rate of photosynthesis was higher in the scattering film with high light transmittance until May, but showed a similar tendency after July. As a result, the difference in the growth characteristics of ginseng is thought to be due to differences in photosynthesis and assimilation according to the coating materials.

소형 차선도색 자동화 장비의 성능 평가에 관한 연구

이용문,김상태,김흥래,최기주 대한토목학회 2016 대한토목학회논문집 Vol.36 No.4

In order to improve the nighttime visibility of the lane, the need for the development of the automated line marking equipment is on the rise. The purpose of this study is to suggest performance assessment methodology that can be assessed from various aspects such as productivity, safety and quality performance of line marking equipment and to comprehensively analyze the performance of hand-operated and automated equipment based on field test. The following shows the results. It suggested a methodology capable of analyzing the performance of the line marking equipment in terms of productivity, safety and quality. Automated equipment for line marking was analyzed that can be obtained productivity achievement rate of 156.3% as compared with hand-operated equipment. On the basis of the expert advise and literature review, we derived twelve safety factors and ten quality factors of unit work in line marking. By utilizing the AHP technique, we estimated the importance of safety and quality factors. Automated equipment for line marking was analyzed to have been able to expect safety improvement rate of 49.8% and quality improvement rate of 47.2%. It is expected that the performance assessment methodology suggested in this study will be useful in analyzing objective and quantitative validity and expected effectiveness of the line marking equipment. 차선의 야간 시인성 향상을 위하여 차선도색 자동화 장비에 대한 개발 필요성이 대두되고 있다. 본 연구의 목적은 차선도색 장비의 성능을 생산성, 안전성 및 품질과 같은 다양한 측면에서 평가할 수 있는 방법론을 제시하고, 현장실험을 바탕으로 수동식 장비와 자동식 장비의 성능을 종합적으로 비교 및 분석하고자 한다. 연구결과는 다음과 같다. 차선도색 장비의 성능을 생산성, 안전성 및 품질 측면에서 분석할 수 있는 방법론을제시하였다. 생산성 측면에서 차선도색 자동화 장비는 기존 수동식 장비와 비교하여 156.3%의 생산성 달성비율을 얻을 수 있는 것으로 분석되었다. 전문가 자문 및 문헌고찰을 바탕으로, 차선도색 단위작업의 안전성 요인 12개와 품질 요인 10개를 도출하였다. AHP 기법을 활용하여 안전성 및 품질 요인별 중요도를 산정하였다. 안전성 및 품질 측면에서 자동화 장비 개발로 인한 성능평가 결과, 안전성 향상률 49.8%와 품질 향상률 47.2%를 기대할 수 있는 것으로 분석되었다. 본 연구에서 제시한 성능평가 방법론을 통하여 차선도색 장비에 대한 객관적이고 정량적인 개발타당성 및 기대효과 제시가 가능할 것으로 판단된다.

축광 노면표시의 야간 시인성 평가를 위한 기초 연구

이용문,김상태,정왕성,김흥래 한국도로학회 2016 한국도로학회논문집 Vol.18 No.4

PURPOSES: In this study, we evaluated changes in the retroreflectivity and luminance of phosphorescent road line markings with changes in glass beads and line marking thickness. METHODS : The color of line markings affects their retroreflectivity. Using a chromaticity test, we conducted the analysis of whether phosphorescent road line markings adhered to the「 KS M 6080」standard. Then, we measured the dry retroreflectivity and wet retroreflectivity for various glass bead refractive indices. We conducted wet retroreflectivity test using the EN 1436 standard as the basis. We also conducted luminance tests for different glass bead refractive indices and line marking thicknesses. RESULTS : 1. Phosphorescent road line markings specimens satisfied the 「KS M 6080」standard. 2. In dry retroreflectivity test, phosphorescent road line markings sprayed with glass beads satisfied the national police agency standard (240 mcd/(m2₩Lux)). Wet retroreflectivity test results showed that except for one type of No.1 glass beads, phosphorescent road line markings specimens sprayed with glass beads of one type of No.3 and two types of No.1 satisfied the national police agency standard (100 mcd/(m2₩Lux)). 3. Phosphorescent road line markings had higher retroreflectivity than non-phosphorescent road line markings in the dry condition. 4. Phosphorescent road line markings sprayed with glass beads demonstrated improved luminance. Luminance increased with higher glass bead refractive index and with increased line marking thickness. However, when the thickness crossed a certain threshold, phosphorescence ceased to increase; this is a characteristic of the phosphorescence phenomenon. CONCLUSIONS : Visibility across short distances can be ensured when phosphorescent road line markings are sprayed with glass beads, because of the retroreflection phenomenon. It is also possible to ensure far visibility using phosphorescent road line markings.

익상편의 병인에 관한 형태학적 관찰

이용문,구분술 중앙대학교 의과대학 의과학연구소 1983 中央醫大誌 Vol.8 No.4

Specimens of 89 cases of pterygia in adult patients were thoroughly examined with light and electron-microscope. In addition to H & E staining, PAS, Masson trichrome, Goldswithch's and Verhoeff's special stainings were conducted. Interpretation of histopathological findings on the abnormal tissues in relation to the patients age groups ad the duration of disease course enabled to conclude as follows: 1. Histopathological alterations in the pterygia were encountered throughout the tissues of the conjunctival epithelium, immediate subepithelial layer and deep layer of substantia propria as well. 2. The concept of "senile elastosis" as the compatible term of the specific finding of pterygium was deniable since the process of tissue alteration in patient did not concurrently progress with aging. 3. Relatively early occurrence of elastodysplasia in deep layer of substantia propria lead to indicate the possibility of primary lesion in combination of activity of fibrocytes in vicinity induced by various factors including the hereditary disposition. 3. Histopathological changes in epithelial and subepithelial hyalinization appeared to be secondary alterations.