In order to reduce the small scale fluctuation resulting from shearing holograpy(Park et. al. 1997), differential panel adjustments were performed for 14 m radio telescope of Taeduk Radio Astronomy Observatory with T2 theodolite It appears that this method improves the surface accuracy by about 50μm 50μm . The measured surface accuracy is, at best, 170μm 170μm . The beam efficiency at 86.2 GHz is estimated to be 44% We also found that the elevation at which Park et. al. performed holography was too low.

이 연구에서는 현실적이고 유의미한 내진보강비용 산정하기 위해 실제 내진보강 사례를 기반으로 통계분석을 수행하여 건축물의 노후도와 연면적을 고려한 보다 현실적인 내진보강 비용을 추정하는 연구를 수행하였다. 데이터 베이스를 기반으로 노후도에 따라 연면적 대한 내진보강비용을 통계적으로 분석하여 이를 정규화하였고, 역으로 연 면적과 준공연도를 가지고 내진보강공사비용을 역추산할 수 있는 방법을 제안하였다.. 지속적인 내진보강 사업 사례의 빅데이터화가 이루어지면 정확성이 높은 내진보강 비용 산정이 실현될 것으로 판단된다.

구조물의 내진보강의 필요성이 대두되고 있지만 이를 담당하는 기관이나 사람은 내진구조 비전공자로 효과적으로 내진보강사업을 발주 및 관리, 감독하는데 어려움이 있다. 이러한 문제점을 해결하기위해 분석적 계층화 프로세스를 이용하여 보강대상 건축물의 내진보강공법 우선순위를 제안하는 프로그램을 개발하였다. 이를 통해 담당자는 구조물별, 내진성능 부족요인 별 최적의 내진보강공법을 선정할 수 있을 것으로 기대된다.

경주지진 및 포항지진을 통해 우리나라도 지진의 안전지대가 아니라는 인식이 증가하면서 지진피해를 줄일 수 있는 내진 설계에 대한 관심이 증가하고 있다. 본 논문에서는 내진설계 기술 중 현재까지 가장 효과적인 방법의 하나로 알려져 있는 면진구조에 대하여 검토하고자 한다. 이를 위해 중층 RC 건축물에 면진시스템을 적용한 후 경계비선형동적해석을 통해 비면진건축물과 면진건축물의 내진성능효과를 비교 분석하였다.

This study was conducted to select candidates from plant resources for the purpose of improving or treating Alzheimer’s disease, a type of dementia. One hundred and eighty-four plant extracts at a final concentration of 100 ㎍/㎖ were screened to determine their capacity to inhibit acetylcholinesterase (AChE) by in vitro assay. From this AChE assay, seven plant extracts - including methanol ext. and water ext. of Phellaodendron amurense Rupr. (bark), methanol ext. of Nelumbo nucifera Gaertn (stamen/ovary), methanol ext. of Persicaria tinctoria H. GROSS (flower), methanol ext. of Coptis chinensis (rhizome), ethanol ext. of Cinnamomum cassia Blume(bark) and ethanol ext. of Carthamus tinctorius L. (fruit) - showed effective inhibition activity ranging from 18.7% to 63.1%. The selected extracts were testified their inhibition activities on AChE and BuChE (butyrylcholinesterase) at concentrations of 25, 50, 100, 200 ㎍/㎖. In the AChE assay, five extracts including methanol ext. of Nelumbo nucifera Gaertn. (stamen/ovary), methanol ext. of Persicaria tinctoria H. GROSS (flower), methanol ext. of Coptis chinensis (rhizome), methanol ext. and water ext. of Phellaodendron amurense Rupr. (bark) showed inhibition activity of 15.0%~73.5%, 19.5%~63.5%, 81.6%~58.5%, 69.9%~80.5%, and 54.8%~78.3%, respectively, at concentrations of 25, 50, 100, 200 ㎍/㎖. In the BuChE assay, the extracts of Nelumbo nucifera Gaertn. (stamen/ovary), Persicaria tinctoria H. GROSS (flower), and Coptis chinensis (rhizome) showed inhibitory capacities of 58.9~81.6%, 45.8%~72.4%, and 33.1%~55.4% at concentrations of 25, 50, 100, 200 ㎍/㎖, respectively. In conclusion, it is suggested that Nelumbo nucifera Gaertn. (stamen/ovary), Persicaria tinctoria H. GROSS, Coptis chinensis (rhizome) and Phellaodendron amurense Rupr. (bark) could be selected as candidate materials for improving or treating Alzheimer’s disease on the basis of further study.

Background: Atractylodes radix is a well-known medicinal crop having many physiological effects. This study was conducted to select useful Atractylodes japonica × Atractylodes macrocephala (AJM) cultivars by comparing anti-oxidative and anti-inflammatory efficacies. Methods and Results: Seven extracts from AJM cultivars were used to treat lipopolysacchride (LPS)-treated BV2 cells, and the effects on cell viability and inhibition on reactive oxygen species (ROS) and nitric oxide (NO) production were analyzed. In vitro scavenging activities of 2,2-diphenyl-1-picrylhydrazyl (DPPH) and peroxynitrite (NOO−) radicals were also investigated. Contents of total phenol, atractylenolide I, and atractylenolide III in the AJM extracts were measured using high performance liquid chromatography (HPLC) or spectrophotometry. The experiments show that none of the seven extracts was cytotoxic above 89.2% at 20 - 250㎍/㎖. Extracts of Gowon, Dawon, Sangchul, and Huchul inhibited ROS generation in a dose-dependent manner, and Sangchul extract showed the highest inhibition on ROS production. All the AJM extracts showed effective inhibitory activity after on NO release in the LPS-treated BV2 cells, and Sangchul extract showed the highest activity. Sangchul extract had the most potent scavenging activities for NOO− and had some DPPH radical scavenging effect. Sangchul extract also had the highest content at total phenol and atractylenolide I content. Atractylenolide III was not detected in the AJM extracts. Conclusions: The results suggested that Sangchul was the most useful anti-oxidative and anti-inflammatory resource among the AJM cultivars.