PURPOSES : The objective of this study is to figure out the trend and characteristics of fine particulate matter (PM2.5) and nitrogen oxide (NOx) concentration in underpass sections. The effect of traffic and meteorological condition on PM2.5 / NOx concentration was analyzed using field monitoring data. METHODS : Based on the literature review, PM2.5 and NOx concentration data were monitored using DustTrak II aerosol monitoring system and Serinus 40 oxides of nitrogen analyzer, respectively. Meteorological and traffic information was collected using automatic weather system and traffic volume counter, respectively. RESULTS : PM2.5 has a positive and negative correlation with relative humidity and wind speed, respectively. Meanwhile, NOx was found to have no correlation with meteorological conditions. The NO/NO2 ratio tends to change with traffic volume, indicating higher correlation between NO and traffic volume; the observed NO2 is mostly a secondary material produced by NO oxidation. CONCLUSIONS : Our study provides clear characteristics of NOx and PM2.5 and correlations with meteorological and traffic information in the underpass sections. It is found from this study that the increase in wind speed causes reduction in the concentration of PM2.5 owing to the diffusion and dispersion phenomena. On the other hand, the meteorological conditions were found to barely have correlations with NOx concentrations in this study. The traffic volume could significantly affect the NOx concentration and NO / NO2 ratio, which is directly correlated to the emissions from vehicles.

생대추가 신소득 작목으로 부각되면서 재배지가 확대되고 있으나 우리나라 장마기와 최근 이상기후로 인해 대추 수분·수정 및 착과에 문제 가 발생하고 있는 실정이다. 이에 생대추 재배를 위해 도입된 비가림하우스에서 서양종 꿀벌과 서양뒤영벌을 이용하여 화분매개곤충의 활동 특성 과 착과 효율에 어떠한 영향을 미치는지 구명하고자 본 시험을 수행하였다. 대추 복조 품종을 대상으로 비가림하우스에 망실을 씌워 서양종 꿀벌 과 서양뒤영벌을 2016년 6월 1일부터 7월 25일까지 약 55일정도 방사하였다. 서양종 꿀벌은 주로 오후에 활동이 많았으나 서양뒤영벌의 활동은 시간에 관계없이 다소 균일하였다. 대추 신초 가지의 착과율을 조사한 결과 방화곤충을 차단한 무처리 5.5% 대비 서양종 꿀벌은 10.2%, 서양뒤 영벌은 8.9%로 대추 비가림하우스내 화분매개곤충 활용시 착과량 증진으로 농가 소득증대에 기여할 것으로 생각된다.

최근 대추에 복숭아유리나방, 사과유리나방 복숭아심식나방이 대추과원에서 발생하고 있으나, 발생 생태에 대한 연구가 미비하여 좀더 효 율적 방제시기를 설정하고자 페로몬 트랩을 이용하여 3년간 발생소장을 조사하였다. 그 결과 복숭아유리나방은 5월부터 10월까지 발생되었으 며, 6월 중순과 9월 중순에 2번의 발생 최성기가 나타내었다. 사과유리나방의 경우 5월부터 10월까지 발생되었으며, 6월 중순 ~ 6월 하순과 9월 중순 ~ 9월 하순에 2번의 발생 최성기를 나타내었다. 하지만 발생 개체수가 많이 않았다. 복숭아심식나방의 경우 5월부터 10월까지 발생이 이루 어졌으며, 7월 중순과 8월 하순 ~ 9월 중순에 2번에 걸쳐 발생 최성기를 나타내었다.

Composite resins are developed as restorative materials to improve esthetics and mechanical properties. To improve the physical properties of resin material, resin filler have to be added. However, no imaging method is adopted for resin filler distribution. Optical coherence tomography (OCT) is a optical imaging technique to delineate microscopic structures within biological tissue. The OCT application to dental composites resin and its filler is not described yet. So, this new and advanced optical method is needed for clinical application for evaluation of dental composite resin. To analyze the spatial distribution of dental composite resin and to evaluate the resin restoration in cavity, frequency domain optical coherence tomography (FD-OCT) was used for their analysis. Resin restored tooth was prepared. For morphological observation, serially sectioned teeth, conventional X-ray taking and micro computed-tomography (CT) images were compared with OCT images. The experiment has done to evaluate the success of the resin restoration using 3 dimensional structure OCT image. In this research, OCT is evaluated as a new technique to image resin restoration. The evaluation of resin restored tooth was performed by OCT. Inappropriate restoration such as marginal adaptation, large porosities, internal integrity and poor contour could be detected. Resin filler also could be checked by OCT. The distribution, number, regularity and size of resin filler can be differentiated from several commercial products. Considering the characteristics of the OCT, it can be used to evaluate the defects of resin restoration, resin filler distribution, and internal integrity between resin material and tooth structure. The OCT can be considered to be a new and advanced method for the evaluation of resin restorations.