• Journal of the Korean Ceramic Society
• /
• v.36 no.2
• /
• pp.203-209
• /
• 1999

LaAlO3d single phase used as the butter layer on Si wafer for YBa2Cu3O7-$\delta$ superconductor application were prepared by solid state reaction method and by self-sustaining combustion process. The microstructure and crystallity of synthesiszed LaAlO3 powder studied using scanning electron microscope (SEM) and X-ray diffractometer(XRD), specific surface area and sintering characteristics fo powder were investigated by Brunauer-Emmett-Teller (BET) method and dilatometer respectively. In solid state reaction method, it is difficult to obtain LaAlO3 single phase up to 150$0^{\circ}C$ period. However, in self-sustaining combustion process, it is to easy to do it only $650^{\circ}C$. Based on the results of analysis of dilatometer it is easier to obtain high sintering density (98.87%) in self-sustaining combustion process than in the solid state reaction method. This reason is that the average particle size prepared by self-sustaining combustion process is nano crystal size and has high specific surface are value(56.54 $m^2$/g) compared with that by solid state reaction method. Also, LaAlO3 layer on the Si wafer has been achieved by screen printing and sintering method. Even though the sintering temperature is 130$0^{\circ}C$, the phenomena of silicon out diffusion in LaAlO3/Si interphase are not observed.

• The Journal of the Korea Contents Association
• /
• v.10 no.4
• /
• pp.282-291
• /
• 2010

This study is carried out in order to suggest the effective method to enhance the resettlement of natives for re-maintenance promotion district of Asansi. This study is carried out through current status survey, native survey, and examining related laws, and the result of study is as follows. First, as a result of examining the intention of resettlement for the residents and merchants who live in the project district, 84% of residents and 80% of merchants wish to resettle. Second, in order to enhance the rate of resettlement, driving project to satisfy the demands of residents and merchants is needed. For this, house supplying policy and complex design technique for corresponding this tendency is needed because they prefer to live a single houses or housing attached to shopping street of 100 million won valued below as well as apartments,. And new types of business which can activate the function of the old city are needed, but making commercial space where current merchants can constantly do business activities is demanded. Third, the expansion of urban regeneration concept which have economics, society, culture, welfare and community as well as physical environment improvement are emphasized is needed. Fourth, the role of government for urban regeneration should be strengthened, and institutional improvement should be supported. Government needs to constantly support including financial supporting in order for the regeneration of regional city, and especially should scout for the policies which community can be maintained and should support first. For this, utilizing public lands inside project district into leading project, government should utilize into "constructing rental houses for natives", inducing the leading key facilities. Fifth, various plan techniques for the resettlement of natives of other advanced countries should be examined and be achieved.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.32 no.2
• /
• pp.208-214
• /
• 1987

A genetic study on the panicle characters in Oryza sativa was carried out by means of a 5 x 5 diallel cross. The five parental varieties were Raekyung, Yeongnamjosaeng, Nongbaek, Yushin and Honenwase. All characters were correlated positively each other, except number of kernels per primary branch. The number of secondary branches per primary branch.was the most effective factor in determining the number of kernels per panicle, the next being the number of primary branches per panicle. Regression analyses of the data of Vr/Wr indicated the presence of non-allelic gene interactions for all characters. Overdominant characters were the number of kernels per panicle, the number of primary branches per panicle, the number of secondary branches per primary branch, the number of kernels per primary branch and sum of kernels on all the tertiary branches per panicle, suggesting that the characters were more influenced by dominant effect than additive effect. However, the number of kernels per secondary branch was partially dominant where the genetic variation was due more to additive effect than to dominance effect. But after omitting the parent which had non-allelic interaction gene, the characters; the number of kernels per panicle, the number of secondary branches per primary branch, and the number of kernels per secondary branch, were partially dominant. Narrow sense heritabilities(h$^2$ N) in number of kernels per panicle and number of secondary branches were high and moderate, respectively, but those of the rest were lower. Mean squares of GCA and SCA of all characters, except SCA of the number of kernels per secondary branch, were highly significant. Effects of GCA were larger than SCA effects in all characters. Raekyung, Yushin and Nongbaek had highly positive GCA, and the best positive SCA was observed in crosses of Nongbaek x Tongillines (Raekyung, Yushin, and Yeongnamjosaeng) in all characters.

• Journal of Bio-Environment Control
• /
• v.11 no.4
• /
• pp.157-162
• /
• 2002

The efficient timer-controlled irrigation and the favorable fruiting position were investigated far highly quality melon fruits from Feb.18 to July Si 1999. The nutrient solution was supplied either at every hour from 6：00 to 18：00 (T-1) or at 6：00, 8：00, 10：00, 11：00, 12：00, 12：30, 13：00, 13：30, 14：00, 14：30, IS：00,16：00, and 17：00 (T-2). A fruit was set at the first node of the fruit bearing branch from the 10, 12, or 13th node of the main stem. Pot weight was maintained at almost n constant level, regardless of the daily integrated solar radiation in T-2. Soluble solids content (SSC) and fresh weight of fruit were not significantly different among the irrigation treatments at each harvesting time. At the first harvest, SSC and fresh weight of fruit were not significantly different between the fruiting positions within the irrigation treatment. At the second harvest, SSC was higher in T-2 than T-1. The SSC was low in the fruit of the loth node in T-1, while it was not significantly different between fruiting positions in T-2. Fruit fresh weight was the highest at the 12 and 13th nodes in T-1, and the 13th node in T-2. Fresh and dry weights of leaf except petiole, regardless of harvesting time, increased as the node position was higher, The higher the fruiting position was, the lower the leaf weight was. Therefore, it is recommended to irrigate more frequently during the mid-noon. Fruits can be harvested earlier at the lower nodes in the spring crop production.

• Journal of Bio-Environment Control
• /
• v.21 no.4
• /
• pp.379-384
• /
• 2012

Bitter gourd (Momordica charantia L.) has long been used for food and medicinal plant in Korea, China and Japan. This study aimed at evaluating productivity, and vitamin-C and charantin contents in bitter gourd (Momordica charantia L.) accessions. The contents of charantin of these two accessions were analyzed using HPLC with the UV-diode array detection. The highest fruit yield was observed in accessions, 'BG1' and 'BG7.' The vitamin-C contents of fruits in these two high-yield bitter gourd accessions, 'BG1' and 'BG7,' depended on days after fruit set and were highest in 24 days and 17 days after fruit set, respectively. The charantin contents of the two accessions were different according to the number of days after fruit set. The charantin content of 'BG1' was highest in fruits harvested at 24 days and followed by 15 days after fruit set. The charantin content of 'BG7' was highest in fruits harvested at 13 days and followed by 16 and 19 days after fruit set. The charantin contents of 13 M. charantia accessions with relatively high yield potential were analyzed and three accessions, 104615, K169995 and NS454, were selected based on their relatively high yield and charantin content. These accessions will be used for breeding program and processed foods.

• Journal of Bio-Environment Control
• /
• v.23 no.3
• /
• pp.229-234
• /
• 2014

We analyzed drainage water from coir substrate in which cucumber plants were grown in winter and elucidated changes in pH, EC, and major nutrients according to the growth stages to recommend nutrient solution management appropriate to each growth stage. From the analysis of drainage solution the growth stages of cucumber were desirable to be divided into two, planting to fruit setting and fruit setting to harvest in case of nutrient solution management. The time required was about 3 weeks from planting to the first fruit setting and thereafter 7~10 days more until the first harvest. Approximately every 3~4 days were needed until the upper flowers bloomed. The time required from fruit setting to harvest was not different much among flowers as cucumber plants grew. From the experimental results, EC of supplied solution was recommended to maintain a little high to $3.0dS{\cdot}m^{-1}$ until before fruit setting and lower a little to $2.0{\sim}2.3dS{\cdot}m^{-1}$ after that. Of course, the amount of solution supply should be increased as plants grew. In case of each nutrients, the recommendation of concentrations of nitrogen, phosphorus and calcium were 700, 60, and $110mg{\cdot}L^{-1}$ each until before fruit setting, and then 660, 50, and $100mg{\cdot}L^{-1}$ each after fruit setting. The concentrations of potassium and magnesium are recommended to start from 400 and $80mg{\cdot}L^{-1}$ until fruit setting and lower a little after that.

• (The)Study of the Eastern Classic
• /
• no.68
• /
• pp.173-208
• /
• 2017

This study sorted out the political methods of the typical shell-and-bone inscriptions during early Western Zhou, the shapes and arrangements of Chan, Chak, and Jak, and the characteristics and description methods of shell-and-bone characters and also investigated the formation backgrounds and changing patterns of shell-and-bone inscriptions with a focus on the transmitted literature and actual shell-and-bone inscriptions. First, the transmitted literature contained records saying that Gogongdanbu told fortunes by burning tortoise shells during Proto-Zhou, but no Bokgap from those days had been excavated yet. The content of the divination focused on the periods of Kings Wen, Wu, and Cheng of Zhou, and the shell-and-bone characters of Juwon contained much content about Jugong those days. Second, there were some differences in the processing methods between Bokgap and Bokgol, but their origin could basically be found in the Joyeongjang form during middle Shang. In addition, it was found that they directly accepted the Bukchon type of Seomseo during late Shang and the divination method of the Proto-Zhou culture. Third, all of Bokgaps had a set of square Chan and rectangular Chak installed on the back, whereas all of Bokgols had a set of circular Chan and vertically thin Chak and were in the shape of a cat's eye. In terms of the Chan, Chak, and Jak arrangement, the Bokgaps were similar to those of Yinxu during late Shang, whereas the Bokgols had the characteristics of the Joyeongjang type during middle Shang. Finally, there were differences in the description methods of shell-and-bone characters according to the arrangement methods of shell-and-bone inscriptions. Some rules were found according to each of the parts. Bokgaps were placed horizontally so that Gapsu would face sideways. The middle sections of Bokgols were mostly placed horizontally with the Byeongbu and Seonbu facing downwards at Golgu to write downwards from right to left. This method was estimated to have something to do with "Sigo" in the divination process in The Rites of Zhou. It was inferred that the perceptions of divination changed in the process of arranging the rites and music institutions during early Western Zhou.

• Procedding of Korea Feed Ingredients Association Conference
• /
• v.1
• /
• pp.37-60
• /
• 2000

• Korean Journal of Rural Living Science
• /
• v.3
• /
• pp.17-26
• /
• 1992

• Water for future
• /
• v.42 no.8
• /
• pp.46-53
• /
• 2009