철도교량의 구조적 안전성 및 사용성을 지속적으로 확보를 위해서는 상시적인 계측을 통하여 교량의 구조적 성능을 감시할 수 있는 시스템의 적용이 필요하다. 현재까지 개발된 기법은 대부분 경제성 및 적용성이 뛰어난 가속도계 측정값을 이용하여 추출한 고유진동수, 모드형상 등의 모달응답을 기반으로 하고 있으나, 이러한 추출과정은 동적응답의 수치해석적 후처리과정을 포함하고 있어 구조적 성능평가 결과에 오류를 발생시키는 주요 원인이 되어 왔다. 이 연구에서는 교량에서 추출한 시간영역 회전각을 이용하여 산정한 변형에너지의 변화에 기반한 손상 평가 기법을 제안하였다. 이 연구에서 제안한 방법은 시간영역에서 측정된 가속도값을 이용하여 산정한 구조물의 회전각에 기반하고 있어 모달응답 추출과 같은 별도의 후처리 과정이 없으며 실제 구조물에 적용이 용이하다. 제안된 이론의 적용성을 검증하기 위하여 수치해석을 이용한 검토를 수행하였으며, 검토 결과 제안된 이론은 충분한 사용성을 가지는 것으로 나타났다.

This paper presents estimation of stiffness parameter on floating structure using dynamic properties such as mode shapes and natural frequencies. The stiffness parameter of the floating structure was estimated via system identification technique.

The purpose of this study was to investigate the anxiolytic-like effect of the methanol extract of Sophorae fructus (MESF) using elevated plus-maze (EPM), open field test, and horizontal wire test in mice. MESF was orally administered at doses of 50, 100, 200, or 400 mg/kg to ICR mice 1 h before behavioral evaluation. The control group was given an equal volume of 10% Tween 80, and the positive control group was given diazepam (1 mg/kg, i.p.). The administration of MESF significantly increased the percentage of time spent in open arms and the entries into the open arms of the EPM compared with the 10% Tween 80-treated control group (p < 0.05). In addition, the anxiolytic-like activities of MESF were antagonized by flumazenil (a GABAA antagonist, 10 mg/kg) but not by WAY-100635 (a 5-HT1A antagonist, 0.3 mg/kg). Futhermore, there were no changes in the locomotor activity and myorelaxant effects of the experimental group, as opposed to the 10% Tween 80-treated control group. Therefore, these findings suggest that MESF promotes the anxiolytic-like activity mediated by the GABAergic nervous system in mice.

The content of luteolin in the different parts of Lithospermum erythrorhizon was determined by high performance liquid chromatography (HPLC). Luteolin was quantified by a reverse-phase column with gradient solvent program (water : ACN = 90 : 10 to 77 : 23 for 60 min). UV detection was conducted at 330 nm. The content of luteolin was measured in the seeds (0.28 mg/g), stems (0.30 mg/g), and roots (0.16 mg/g) of L. erythrorhizon. The presence of luteolin in Lithospermum species is important in agricultural crop production for increasing the amounts of clinically available medicine and health supplements.

The concentrations of HCHO(formaldehyde), PM10(particulate matter), CO₂(carbon dioxide) and TBC(total bacteria counter) distribution in schools(Chung-Nam Area) were examined, and the results were compared with the recommended criterion of the administration law of indoor air. The subjects were an elementary school, a middle school and a high school in Chung-Nam area, and the concentration of TBC was examined by Single Stage Air Cascade Sampler, which applied the inertia collision catching method of 28.29L/min(flux) during 5 months from March, 2007 to July, 2007. The instrument(LD-3B, SIBATA Company)was used to examine PM10, by a light scattering method and a light transmission method. The instrument(Airboxx(KD Engineering) was used to examine CO₂. The instument(Z300XP(Environmental sensor)was used to examine HCHO. The result indicated that the PM10 average concentrations of the surveyed classrooms were 49 μg/m3 in Spring and 59 μg/m3 in Summer. The CO₂ average concentration of the surveyed schools were 576 ppm in the classroom and 527 ppm in the stateroom. The average concentration of TBC were 729 CFU/m3 in an elementary school, 401 CFU/m3 in a middle school, 381 CFU/m3 in a high school. The HCHO average concentration of the surveyed schools were 0.03 ppm in the classroom, 0.02 ppm in the stateroom.

비타민 E를 구성하는 토코페롤(Tocopherol, T)과 토코트리에놀(Tocotrienol, T3)은 각각 alpha(a)-, beta(b)-, gamma(g)-, delta(a)- 의 이성질체가 존재하며 항산화, 항암 및 고지혈증 개선 등 효과가 뛰어난 물질로 알려져 있다. 국내에서 수집된 재래종 수도 유전자원을 대상으로 이들 성분의 함량 분포를 조사코자2 20개 품종을 선발하여 현미를 분석한 결과 평균적인 aT, bT, gT 및 총T 함량은 각각 8.3, 0.5, 1.2, 및 10.0 ug/g 이었으며, aT3, gT3, dT3 및 총 T3 함량의 평균치는 각각 6.7, 17.5, 0.7 및 24.7 ug/g이었다. 8종의 vit E 이성질체의 총 합으로 나타낸 총 vit E 함량의 최소, 평균 및 최대값은 각각 9.9, 60.3 및 34.6 ug/g 이었다. 변이계수를 기준으로 평가할 때, gT (CV=79%)의 함량 분포가 품종간 변이가 심한 것으로 나타났으며 aT 함량(CV=79%)은 가장 변이가 작은 것으로 나타났다. 분석된 220개 품종 중에서 가장 높은 aT, aT3, gT3 및 총 vit E 함량을 나타낸 품종은 각각 화성밭찰, 재래륙도, 조석조, 산도이었다.