마에는 다양한 기능성 성분이 함유되어 있어서 식용 및 약용으로 다양하게 이용되고 있다. 특히 allantoin은 대표적인 마의 2차 대사산물로서 의약품 및 기능성 화장품 제조에도 활용되는 고부가가치 산물이다. 본 연구에서는 아미노 결합 정지상 HPLC 컬럼을 이용하여 마의 속과 껍질의 allantoin 함량을 분석하였다. Allantoin 표준용액의 검량 선의 결정계수(R2)값은 0.9999로 높은 직진성을 보였으며, 검출한계(LOD)와 정량한계(LOQ)는 각각 0.0229 mg/mL 및 0.0694 mg/mL로 설정되었다. 마 속과 껍질의 건조중량 기준 allantoin 함량은 각각 3.09±0.02 mg/g, 3.91±0.11 mg/g으로 속보다 껍질에 더 많은 allantoin이 함유되어있음을 확인하였다. 따라서 이러한 결과를 토대로 향후 농업부산물인 마껍질이 새로운 고부가가치 기능성 소재로 활용될 수 있음을 확인하였다.

In the present work, an experiment using the active infrared thermography (IRT) technique in the laboratory is conducted on a carbon fiber-reinforced polymer (CFRP) that is applied on a concrete specimen surface. The main goal is to detect debonding located between CFRP sheets as well as between the CFRP sheet and the concrete surface. In addition, the effect of the debonding depth is also studied.

This study aims to investigate the qualitative and quantitative performance of concrete defect using Pulsed Thermography (PT) and Pulse Phase Thermography (PPT) techniques. The experimental study was carried out on a concrete specimen in-placed artificial defects with various depths and sizes. The signal-to-noise technique was used to compare the contrast between the two methods. The results showed that the thermal images obtained from PPT show clearer than those from PT (using contrast-based method).

In this study, an experimental study of Impulse Thermography was carried out on a concrete specimen with in-placed artificial defects at different depths and dimensions. Then, all the data were processed by Pulse Phase Thermography technique by performing Fast Fourier Transformation. The results were compared with the absolute contrast method.

노니의 주요 산지인 사모아, 인도네시아, 중국(하이난), 하와이, 태국, 타히티에서 생산된 노니 열매를 착즙하여 산지별 노니열매 착즙액의 이화학적 특성, 기능성 성분 및 항산화 활성을 비교분석하였다. 산지별 노니열매 착즙액의 pH는 3.63-3.83 수준으로 나타났으며, 색도는 태국산이 다른 산지 노니열매 착즙액보다 L, a, b 값 모두 유의적으로 낮은 값으로 나타났다. 고형분 함량은 5.97-6.97 °Brix 범위로 하와이산이 6.97 °Brix로 가장 높았으며, 반면 인도네시 아산이 5.97 °Brix로 가장 낮은 값을 나타내었다. 태국산이 가장 많은 스코폴레틴과 루틴을 함유하고 있었으며, 인도네시아산이 다른 지역에서 생산된 노니열매 착즙액보다 폴리페놀 함량이 유의적으로 가장 높았다. 항산화 활성 중 DPPH 라디칼 소거능은 인도네시아 > 하와이 > 타히티 > 태국 > 사모아 > 중국 순으로 나타났으며, ABTS 라디칼 소거능은 인도네시아 > 하와이 > 타히티 > 사모아 > 중국 > 태국 순으로 나타나 인도네시아산이 가장 높은 항산화능 을 보였다. 이상의 결과, 태국산이 스코폴레틴과 루틴의 함량이 가장 높았으며, 반면 인도네시아산이 가장 우수한 항산화 활성을 가지는 것을 확인하였다.

The purpose of this research is to consider the qualitative and quantitative performance of reinforced concrete deteriorations using active infrared thermography (IRT) technique. An experiment of five different cases of environmental conditions was conducted on a concrete slab in laboratory. A comparison of the IRT results between normal and reinforced concrete is also discussed. The results showed that the absolute contrast between defective area and non-defective area increases with the increment of ambient temperature. Besides, the values of absolute contrast above delamination obtained from normal concrete showed high than those under effect of reinforcing steel bar.

This research aim to investigate the qualitative and quantitative performance of concrete deteriorations using Pulse Square Thermography (PST) technique. An experimental test of ten cases was conducted on a concrete slab specimen under different meteorological conditions. The results showed that the absolute contrast between defective area and sound area decreases with the falling of ambient temperature. Besides, the delamination with identical size but placed at a deeper position indicates lower absolute contrast than the shallow delamination.

A RSM-based reliability analysis approach is applied to evaluate the safety of floating structures considering uncertainties associated with various design variables. Uncertainties in both load and resistance related variables are explicitly considered in the analysis. It is expected to be practically applied in the reliability-based design of real structures including floating structures.

We have tested the measuring system that can monitor the dynamic behaviour of floating structure by various sensors. In this paper, we present a initial result using a low-cost GPS sensor, which showed the inaccurate position and insufficient frequency for a floating structure.

This research provides the analyzing case of abnormal expanding of concrete including steel slag aggregate as a recycled aggregate. To determine the reason of abnormal expansion, the components of concrete were searched and the aggregate was found out as a reason of this expansion. The aggregate used was a type of steel slag aggregate without any specific treatment for volumetric stability such as fast-cooling or aging. SEM observation of the aggregate and XRD analysis of the cement paste were conducted and it was found out that the surface of the aggregate is very rough and the cement paste contained a lot of calcium and magnesium. From this research, it is considered to contribute on providing the actual case of failure using steel slag aggregate for concrete.

The purpose of this research was to investigate applicative possibility of field. Pilot-scale experiments were conducted, at outdoor temperature, HRT 10hour, IR(Internal Recycle) 150% and used 2.8㎥ Reactor. External carbon source was varied 80 to 120 mg/L. When External carbon source and Alkalinity were injected to the B3 pilot plant, the removal efficiencies of COD and BOD were not decreased. Nitrification rate were 5.95, 5.40, 4.08 mgNH4+-N/gSS/d during operation periods and denitrification rate was 3.12mgNO3--N/gSS/d. When we surveyed the relationship between loading rate of nitrogen and nitrogen removal quantity, this data was 0.949, B3 process will be possible application process of field.