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RFM을 이용한 고해상도 위성영상의 기하보정에 관한 연구
전형섭,정용주,조기성 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2003 工學硏究 Vol.34 No.-
Manufacturing of the large scale map using the high-resolution satellite data requires high-precision geometric correction, and for this the location ephemeris data as like the location and attitude of the satellite sensor, which is an orbit component model, is needed, but in IKONOS satillite these are not porvided because of the business technology protection. Therefore, in this study, as the basic course for obtaining the ground coordinates from the IKONOS satellite imagery, using the ground control point without the satellite aid data it derived RMF's coefficient in the geometric correction of high-resolution satellite imagery, did the geometric correction using RFM and evaluated accuracy, and then finally it could be gotten the follwing conclusion as the result of evaluating the RMF's usefulness. First, as the result of applying to the least square method, to derive the coefficient of RFM using the ground control point, in the case of using the third order expression, it could derived the exact coefficient value about 0.686 pixel(m) of the root mean square error. Second, as the result of comparing the polynominal expression model and RFM, by using RFM it could improve the root mean square error more than 1.5 pixel. Third, RFM is very sensitive to the Z value information, and it could know that using the polynominal expression is more efficient than RFM is if the Z value infromation is inaccurated.
MgO 버퍼층을 이용한 PZT 박막의 형성 및 특성 평가
김지미,전호승,강재경,최형봉,김철주 서울시립대학교정보기술연구소 2001 정보기술연구소 논문집 Vol.3 No.-
In this paper, we fabricated the MgO layer by sol-gel method and estimated possibility as a buffer layer for ferroelectric such as PZT. MgO(Magnesium Oxide) proposed as buffer layer of ferroelectric is already for much used as buffer layer in optic technology. There are many formation methods of MgO layer, but in this study, we selected the sol-gel method which is easy to control the content of material and possible for fabrication of uniform layer, then we formed thin layer through the composition of MgO and PZT solution, spin coating and annealing. To estimate the possibility as buffer layer about ferroelectric layer, we analyzed the physical and electrical characteristics about PZT on MgO layer.By SEM, AFM and XRD analysis, we could know facts that the surface condition of PZT on MgO was relatively smooth and the crystal orientation of PZT was enhanced by MgO layer. Due to the measurements of P-V, C-V and I-V characteristics of PZT/MgO capacitor structure, the polarization, fatigue and breakdown properties of PZT on MgO were much improved than those of PZT without MgO layer. Also, in MFIS structure, the PZT on MgO showed the stable memory property. These results could be compared to those of MgO buffer layer formed by sputtering, so, if studies about the composition of MgO solution and the formation of MgO layer are executed continuously, the fabrication process of MgO layer by sol-gel method can be applied as the process for buffer layer of ferroelectric.
전형주(Jeon, Hyeong-Ju),차윤환(Cha, Yun-Hwan),장혜륜(Jang, Hye-Rroon) 한국웰니스학회 2016 한국웰니스학회지 Vol.11 No.4
본 연구는 명월초 추출물의 항산화성분 분리 및 루틴의 정량분석을 평가하기 위한 것이다. 항산화성분의 함량을 가장 많이 함유한 명월초 잎 에탄올추출물(Leaf-E)에서 기능성 소재로서의 연구를 수행하였다. Flavonol 배당체의 분리 및 동정과 LDL-antioxidant 활성분석결과 80% MeOH 수용액을 여과, 감압 농축하여 MeOH 추출물을 얻었다. 이를 EtOAc 분획, n-BuOH 분획, H2O 분획으로 나누었으며, EtOAc 분획에 대해 silica gel column chromatography를 실시하여 4종의 Flavonol 배당체를 분리 및 정제하였다. 1H-NMR, 13C-NMR, DEPT spectrum 및 Mass spectrum 등을 통하여 화합물 1-Astrgalin, 화합물 2-Isoquercitin, 화합물 3-Kaempferol, 화합물 4-Rutin의 구조를 결정하였고, Rutin 함량 분석을 통해 명월초의 기능성 소재 및 융합소재로의 가능성을 평가하였다. This study is to evaluate the antioxidant activity and functionality of the Gynura Procumbens. The content of most commonly contains the content of the antioxidant patients early leaf ethanol was studied as a functional material in the extract (Leaf-E). Flavonol glycosides and Identification and separation of the LDL-antioxidant extracted by the activity analysis of 80% MeOH aqueous solution was filtered and concentrated under reduced pressure to obtain a MeOH extract. In EtOAc fraction, n-BuOH fraction, fractions were divided into H2O, the four kinds of Flavonol glycosides isolated and purified by silica gel column chromatography performed for the EtOAc fraction. 1H-NMR, 13C-NMR, DEPT spectrum and Mass spectrum, such as through the 1-Astrgalin compound, the compound 2-Isoquercitin, compound 3-kaempferol, to determine the structure of the compound 4-Rutin. Rutin substance containing a name beginning with a variety of activities that will be enough the value of a functional food material and fused material.
동결분쇄에 따른 아로니아, 자몽, 서리태, 발아현미의 이화학적 특성
전형주 ( Hyeong-ju Jeon ),이일남 ( Il-nam Lee ),한예은 ( Ye-eun Han ),정호준 ( Ho-jun Jeong ),박하은 ( Ha-eun Park ),정주영 ( Ju-yeong Jung ),이진규 ( Jin-kyu Rhee ) 한국미생물생명공학회(구 한국산업미생물학회) 2017 한국미생물·생명공학회지 Vol.45 No.4
식품중의 영양성분을 잘 보존하고 섭취가 용이하며 소화가 잘 될 수 있는 가공방법의 최적화를 위하여 식품원료의 동결분쇄물과 일반분쇄물을 비교하였다. 단백질의 공급원으로 알려진 서리태는 동결분쇄한 것이 일반분쇄한 것에 비해 미세하나 에너지원으로서 영양성분 보존율(이하보존율)이 4.57% 높고, 미네랄은 큰 차이가 없었다. 특히, β-carotene의 경우, 동결분쇄가공분말에서 11.54% 높게 포함되어 있어 비타민 A의 전구물질인 공급에 유리함을 보였다. 아로니아의 총 안토시아닌은 동결분쇄가 453.49 mg으로 일반분쇄 158.98mg 보다 보존율이 높았다. 자몽에서 열에 약한 베타카로틴은 동결분쇄가 129.47%, 니아신은 439.39%로 동결분쇄가 보존율이 높았다. 발아현미는 동결분쇄에서 단백질, 탄수화물, 니아신이 107.74%, 103.87%, 156.52%로 각각 높았다. Protease에 의한 단백질 소화율은 일반분쇄에 비하여 아로니아가 120.5%, 서리태가 101.14%로 동결분쇄방법이 단백질 소화율이 높았다. 그러나, 자몽과 발아현미는 동결분쇄에서 94.06%와 93.14%로 소화율이 떨어졌다. We compared the ingredients present in freeze-dried ground food samples with those present in hot air-dried and ambient ground food samples to optimize processing conditions for preserving nutrients in and for improving the ingestion of different foods. The freeze-dried ground sample of black bean showed 4.57% higher retention rate than the ambient ground sample of black bean. Mineral content was also significantly different between these two samples. Moreover, the freeze-dried ground sample of black bean contained 11.54% higher content of β-carotene, a precursor of vitamin A, than the ambient ground sample of black bean. Total anthocyanin content was 453.49 mg in the freeze-dried ground sample of Aronia compared with 158.98 mg in the ambient ground sample of Aronia. Contents of β-carotene and niacin increased by 129.47% and 439.39%, respectively, in the freeze-dried ground sample of grapefruit. Retention rates of proteins, car-bohydrates, and niacin were 107.74%, 103.87%, and 156.52%, respectively, in the freeze-dried ground sample of germinated brown rice. Protein digestibility increased by 120.5% and 101.14% in the freeze-dried ground samples of Aronia and black bean, respectively, but did not increase in the freeze-dried ground samples of grapefruit and germinated brown rice.