• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.140-143
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• 2004

The west coast of the Korean Peninsula is famous for its large tidal range (up to 9 m) and vast tidal flats. With comparison the sedimentary environments of open and close tidal flat using remote sensing, we select Kanghwa tidal flat and Hwang-Do tidal flat in Cheonsu Bay. Prior to surface sediment discrimination using remote sensing, sedimentary environments including intertidal OEM, hydraulic condition, and relationship between grain size and various tidal condition are investigated. Remote sensing has the potential to provide synoptic information of intertidal environments. The objectives of this study are: (i) to generate an intertidal digital elevation model (OEM) using the waterline method of Lansat TM/ETM+, (ii) to investigate the tidal channel distribution using texture analysis, and (iii) to analyze the relationship between surface grain size by using in-situ data and intertidal OEM and tidal channel density by using high-resolution satellite data such as IKONOS and Kompsat EOC. The results demonstrate that satellite remote sensing is an efficient and effective tool for a surface sediment discrimination and long term morphologic change estimation in tidal flats.

• 한국식품조리과학회지
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• 제8권1호
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• pp.1-7
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• 1992

Recently, plenty of imported Chinese Mungbean is sold, for Korean Mungbean is expensive. But they say, Chinese Mungean has less delicacy and cooking quality. Above all, in comparison with Korean and Chinese Mungbeans properties they are different - Chinese Mungbean grain is twice in dimension, Chinese Mungbean is white and Korean one is yellow in peeled grain color. They are similar in size shape with the microscope. With Amylograph of Brabender the viscosity of Korean Mungbean is gradually and continually increased until heating from $25^{\circ}C$ to $92.5^{\circ}C$ and cooling to $25^{\circ}C$ again, but the one of Chines Mungbean is increased suddenly in 74$^{\circ}C$ and shows the abrupt break-down phenomenon. This same phenomenon is shown in swelling with melting-pointer, In $25^{\circ}C$, the cooling temperature, Chinese Mungbean is measured to 1400 B.U and Korean one 1600 B.U. With color-meter of Richard S. Hunter, 12% gel of Korean Mungbean starch is clear but Chinese one white. The texture of 12% gel of Chinese Mungbean starch with Rheo-meter becomes hardened much more than Korea one. As a result of sensory-test, color, cohesiveness, and flavors of Korean gel is preferred overwhelmingly.

• 자원환경지질
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• 제32권1호
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• pp.1-11
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• 1999

In the last decade, the supply of natural aggregates has been continuously increased due to the other types of aggregates. In general, aggregates constitute 70-80% of the total volume of concrete, so the quality of aggregates is main factor controlling physical characteristics of concrete. For this reason, physical properties of aggregate according to different rock types were studied. The majority of crushed aggregates is taken out of granite, gneiss, sandstone, andesite, basalt and so forth. The physical properties of these rock types were tested and most of them fell within the acceptable limit on the base of Korean standard regulation. The major lithology of the crushed aggregates is granite and gneiss, both of which are marked for more than 50% of total lithology thpes in Korea. A to the physical properties of granite, the high specific gravity coincides with low porosity, low absorption ratio, while the abrasion and soundness index show, in general, no specific trend. It has been assumed that slight differences of the physical properties of granite aggregates are related with those of the mineral composition, grain size, and so on. In comparison to granite, the physical properties of gneiss have little correlation one after another. This trend is related to different mineral composition, grain size and typical sheet fractures typically prevailing in the texture of gneiss. Spatial pattern of physical properties shows that high specific gravity of granite coincides only with low porosity and absorption ratio in all provinces except Cheolla province, and high specific gravity of gneiss coincides with low porosity and absorption ratio only in Cheolla and Gandwon provinces.

• 한국수산과학회지
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• 제37권4호
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• pp.312-322
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• 2004

Physical and geoacoustic properties of inner shelf sediment in the South and Southeastern Seas of Korea have been studied based on six piston core samples. The sediments are largely composed of homogeneous mud except the core from the southeasternmost part of the area. Both physical and geoacoustic properties and mean grain size are relatively uniform with sediment depth, suggesting little effect of sediment compaction and/or consolidation. Mean grain size appears to be the most Important variable to determine the physical and acoustic properties. In contrast, the attenuation shows more or less fluctuations. Correlations between physical properties and sediment texture show slight deviations from those of the compared data, caused by the difference of sedimentary processes, mineral composition, and the difference of measurement system. In particular, the velocity is lower (approximately 20-30 m/s) than that of the previous data measured in the same area. This is probably due to the difference in velocity measurement system (particularly, error by a length of sample). We propose new relationships for physical and geoacoustic characteristics of shelf sediment in the study area.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2004년도 제5회 압연심포지엄 신 시장 개척을 위한 압연기술
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• pp.63-71
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• 2004

Recently, a sheet forming process of Mg alloys is highlighted again due to increasing demand for Mg wrought alloys in the applications of casings of mobile electronics and outer-skins of light-weight transportation. Microstructure control is essential for the enhancement of workability and formability of Mg alloy sheets. In this research, AZ31 Mg alloy sheets were prepared by hot rolling process and the rolling condition dependency of the microstructure and texture evolution was studied by employing a conventional rolling mill as well as an asymmetric rolling mill. When rolled through multiple passes with a small reduction per pass, fine-grained and homogeneous microstructure evolved by repetitive dynamic and static recrystallization. With higher rolling temperature, dynamic recrystallization was initiated in lower reduction. However with increasing reduction per pass, deformation was locallized in band-like regions, which provided favorable nucleation sites f3r dynamic recrystallization. Through post annealing process, the microstructures could be transformed to more equiaxed and homogeneous grain structures. Textures of the rolled sheets were characterized by $\{0002\}$ basal plane textures and retained even after post annealing. On the other hand, asymmetrically rolled and subsequently annealed sheets exhibited unique annealing texture, where $\{0002\}$ orientation was rotated to some extent to the rolling direction and its intensity was reduced.

• 한국자기학회지
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• 제4권4호
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• pp.319-325
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• 1994

제조조건이 다른 여러 퍼멀로이 합금 타게트를 사용하여 RF 마그네트론 스퍼터링법에 의해 퍼멀로이(NiFe) 박막을 증가시킬 경우 타게트의 제조조건이 박막의 자기특성에 미치는 영향을 조사하 였다. 타게트를 온도에서 어닐링한 결과 $650^{\circ}C$ 이상의 온도에서 재결정이 일어나 미세구조는 압 연조직에서 미세한 재결정립 조직으로 바뀌었으며 이에 따른 집합조직은 (110) 집합조직에서 random 집합조직으로 변화가 일어났다. 재결정이 일어나지 않은 타게트를 사용하여 투입전력 300 및 400 W에 서 증착한 박막의 경우 보자력은 1~5 mTorr의 비교적 넓은 범위의 아르곤 압력에서 낮은 값을 나타 내었으며 이때의 최소값은 0.20 Oe 이하였다. 반면, 재결정이 일어난 타게트의 경우 투입저력 300 W에 서는 5 mTorr에서는 1 mTorr에서만 보자력이 낮은 값을 나타내었으며 이때의 최소값은 0.25 Oe 이하였 다. 박막의 내부응력은 타게트에 관계없이 아르곤 압력이 증가함에 따라 압축응력에서 인장응력으로 변하엿으며 타게트에 따라 5 mTorr에서 거의 사라졌다. 박막의 보자력 및 투자율의 변화는 타게트에 따라 변화되는 박막 조성 및 내부응력의 차이에 기인한 것으로 고찰되었다.

• 대한금속재료학회지
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• 제47권10호
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• pp.681-685
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• 2009

$CeO_2$ buffer layers have been deposited on YSZ single crystal substrates via a radio-frequency sputtering method. We focused on the texture development of $CeO_2$ with out-of-plane alignment and its effects on a superconducting YBCO layer, which was deposited by metal organic deposition. $CeO_2$ layers were grown epitaxially on single crystal YSZ substrates and subsequent YBCO layers were also grown epitaxially from $CeO_2$ layers. It was observed that the intensity of $CeO_2$(200) decreased with deposition temperature. ${\theta}-2{\theta}$ scan FWHM values of $CeO_2$(200) were inversely proportional to the peak intensities of $CeO_2$(200). The sample with the lowest $CeO_2$(200) intensity and poor out-of-plane alignment showed a strong reaction with the MOD-YBCO layer resulting in a thicker $BaCeO_3$ layer. The texture and superconducting property of the YBCO layer were affected indirectly by the formation of a $BaCeO_3$ layer at the interface between the $CeO_2$ and YBCO layers.

• 한국식품영양과학회지
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• 제33권10호
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• pp.1726-1734
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• 2004

백미밥에 비하여 기능성과 기호성이 향상된 다시마밥의 최적조건을 구하기 위하여, 관능검사를 실시하였고, 그 결과를 반응표면 분석하여 다시마편 첨가비율, 가수량과 침지시간 등의 최적 수준을 정하고, 최적수준으로 제조한 다시마밥과 백미밥의 물성검사와 영양적 품질평가를 비교하였다. 40대 이상을 대상으로 한 결과로부터 얻어진 2차 회귀 방정식에서 맛, 찰기, 색상, 전반적기호도의 관능적 특성에서 유의성이 인정되었고(p<0.03), 예측되는 최적조건은 다시마편 첨가비율 14%, 가수량 1.67배, 침지시간 47분이었다. 이 최적조건으로 지은 다시마밥의 경도는 압력솥으로 지었음에도 불구하고 경도는 상압에서 지은 백미밥과 비슷하였다. 부착성은 상온에서 지은 백미밥보다는 낮았고 압력솥에서 지은 백미밥과는 큰 차이 없었다. 씹힘성은 상온에서 지은 백미밥에 비해 2배 높았으나 압력솥에서 지은 백미밥보다는 약간 낮았다. 밥을 지은 뒤 30분 경과 후의 물성의 변화는 백미밥보다 다시마밥의 변화가 더 적었다. 다시마밥의 식이섬유소 함량은 5.4%이었고, 백미밥에 비해 식이성 섬유소, 회분, 단백질의 보강효과는 현저하였다. 다시마밥의 단백질 소화율(in vitro), 단백질 효율비 (C-PER)과 전분호화도는 백미밥에 비해 낮게 나타났다. 따라서 다시마밥은 열량섭취량이 높고, 섬유소 섭취량이 낮은 현대인의 식생활에 이을 보완해주는 저열량 고섬유소의 기능적 식품으로 권장할 수 있을 것으로 판단된다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.338-338
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• 2017

One of the problems in increasing rice production is getting lines or varieties that have high adaptability so that able to produce maximum production in a variety of environmental conditions. One strategy that can be done to get adaptive varieties is through the improvement of native varieties. This research was conducted in rain fed paddy field, Aceh province, Indonesia from June to September 2014. The texture of the soil was clay-loam with the soil pH ranged from 6.5-6.7. Five potential progenies of rice from crossing between native Indonesian rice with introduced rice varieties consist of C3, C4, S3, S5, S6 were used in this study. Besides that, one national rice variety Ciherang also used as a comparison. The plants were growth in the plot with the size of $2m{\times}1.4m$ with plant distance was $20cm{\times}20cm$. The fertilizers used in this study were Urea, NPK, and KCl. Randomized block design with 6 rice progenies/variety and 3 replications were used in this study. There were 18 experimental units and each experimental unit had 10 samples for the sources of data. The variables that were observed in this study including plant height at harvesting time, number of productive tiller, the percentage of empty grains and filled grain per panicle, weight of filled grains per hill, weight of filled grain per plot and yield potential per hectare. Analyzed were also conducted for the depth of root penetration, dry-root weight, dry-shoot weight, shoot-root weight ratio and its correlation with the weight of filled grain per hill. The research results show that there was significant difference on plant height at harvesting time, number of productive tillers, the percentage of empty grains and filled grain per panicle, weight of filled grains per hill, weight of filled grain per plot and yield potential per ha (p>0.01) among the treatments. In addition, depth root penetration, dry-root weight, dry-shoot weight, shoot-root weight ratio also had significant difference (p>0.01) among the treatment. The highest plant at harvesting time was found in S6, reaching 129.8 cm and the shortest plants was found in C3 reaching 107.5 cm. The largest number of productive tillers and the highest percentage of filled grains per panicle were found in Ciherang reaching 10.5 tillers and 80.7% respectively. Ciherang also had the heaviest weight of filled grains per hill and per plot reaching 21.1 g and 2.18 kg respectively. Whereas, S6 had the lowest number of tillers and the lowest percentage of filled grain per panicle.. The highest yield potential per ha was found in Ciherang reaching 7.79 tons. Among the progenies, S5 had the highest yield potential reaching 5 tons/Ha. The result also showed significant relationship between shoot-root weight ratio with weight of filled grains per hill. The highest value of shoot-root weight ratio (1.57) in Ciherang is thought had closed relationship with its yield potential.

• 마이크로전자및패키징학회지
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• 제12권1호
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• pp.53-58
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• 2005

구리 배선에서의 신뢰성 평가를 위해 직류전류와 교류전류를 각각 인가하였을 때의 파손 발생을 분석해 보았다. 직류 전류에서는 electromigration 현상이 발생하는데, 높은 전류 밀도와 온도에서 더욱 빠르게 파손이 진행되었으며, 실험을 통해 구한 활성화 에너지와 전류밀도 의존지수는 각각 0.96eV와 4의 값을 갖는 것으로 나타났다. 교류 전류에서는 열 피로 현상이 발생하였는데, 높은 주파수와 ${\Delta}$T가 클수록 파손이 심하게 진행되었다. 집합 조직에 따른 failure morphology분석 결과, (100)grains에서는 결함이 넓게 성장하여 facetted grains가 되지만 (111)에서는 배선의 두께 방향으로 성장하여 빠르게 단선을 유발하는 것으로 나타났다.