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        검색결과 507

        381.
        1992.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Static performance was compared for the triangular plate elements through some numerical experiments. Four Kirchhoff elements and six Mindlin elements were selected for the comparison. Numerical tests were executed for the problems of rectangular plates with regular and distorted meshes, rhombic plates, circular plates and cantilever plates. Among the Kirchhoff 9 DOF elements, the discrete Kirchhoff theory element was the best. Element distortion and the aspect ratio were shown to have negligible effects on the displacement behaviour. The Specht's element resulted in better results than the Bergan's but it was sensitive to the aspect ratio. The element based on the hybrid stress method also resulted in good results but it assumed to be less reliable. Among the linear Mindlin elements, the discrete shear triangle was the best in view of reliability, accuracy and convergence. Since the thin plate behaviour of it was as good as the DKT element, it can be used effectively in the finite element code regardless of the thickness. As a quadratic Mindlin element, the MITC7 element resulted in best results in almost all cases considered. The results were at least as good as those of doubly refined meshes of linear elements.
        4,600원
        382.
        1992.02 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        7,000원
        383.
        1992.02 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        7,700원
        386.
        1989.06 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        5,800원
        388.
        1983.12 구독 인증기관·개인회원 무료
        389.
        2023.04 KCI 등재 서비스 종료(열람 제한)
        This study investigated the antioxidant effect of Hermetia illucens larvae using different extraction temperatures and solvents. We found significant differences in total phenolic content (TPC), total flavonoid content (TFC), an in three antioxidant indexes 2,2-diphenyl-1-picrylhydrazyl (DPPH), 1,1’-azino-bis-3-ethylbenzothiazoline-6-sulphonic acid (ABTS), and ferric-reducing antioxidant power (FRAP) contents, among the samples depending on the extraction temperature and solvent used. The sample extracted with water at 45℃ (HIW-45℃) showed the highest TPC, DPPH, ABTS, and FRAP contents, while the sample extracted with water at 90℃ (HIW-90℃) showed the highest TFC. These differences can be due to the different chemical structures of the extracted components. Based on these results, HIW-45℃ was the optimal extraction method for Hermetia illucens. We intend to further investigate the availability of functional materials for Hermetia illucens using this method.
        390.
        2022.10 KCI 등재 서비스 종료(열람 제한)
        The present study investigated the feasibility of using the ethanolic extract of Hermetia illucens larvae (HIE) as a whitening improvement material. In cell viability assays using B16F1 melanoma cells, no cytotoxicity was recorded up to 200 μg·mL-1 of HIE. Moreover, while tyrosinase inhibitory activity increased, melanin content decreased in a dose-dependent manner, indicating that HIE likely inhibited tyrosine-induced intracellular melanin biosynthesis in B16F1 melanoma cells. Therefore, HIE is expected to serve as a potent whitening improvement material.
        391.
        2018.06 KCI 등재 서비스 종료(열람 제한)
        본 연구는 효과적인 게임 현지화 방법에 대한 연구로 게임 텍스트의 번역에 있어 캐릭터성이 미치는 영향력을 증명하고자 한다. 보편적으로 상호작용 스토리텔링의 구조를 가진 게임 속 캐릭터들은 게임 속에서 일어나는 이벤트의 큰 영향력을 가진다. 또한 캐릭터가 특정 문화나 상징에 기반을 둔 경우 필연적으로 스토리와 연계성이 더욱 강해진다. 본 연구는 카발라의 ‘세피로트의 나무’를 바탕으로 캐릭터성이 구성된 게임 ‘로보토미 코퍼레이션’에 등장하는 캐릭터들의 캐릭터성을 분석하고 이를 통해 효과적인 현지화를 위해 게임 번역이 나아가야 할 방향을 제시 하고자 한다.
        392.
        2018.02 KCI 등재 서비스 종료(열람 제한)
        본 연구는 Pym이 제시한 모방 이론(Copying Theory)이 게임을 번역하는 데에 효과적인 전략임을 제시하고자 한다. 게임에서 사용되는 언어는 대부분이 영어인데 이는 게임이 주로 미국을 중심으로 발전되어 왔기 때문이다. 사람들은 게임을 하며 효율적인 의사소통을 추구하며 때문에 그들은 번역된 단어들을 간단하게 축약시키거나 원어를 그대로 발음되는 대로 사용하며이는 의사소통에 있어서 효과적인 전략으로 작동하고 있다. 이러한 양상을 통해 게임을 번역하는 데에 있어서 외래어를 그대로 사용하는 것이 번역가의 선택 가능한 효과적인 전략 중 하나임을 알 수 있다.
        393.
        2017.12 KCI 등재 서비스 종료(열람 제한)
        The potato tuber is known as a rich source of essential nutrients, used throughout the world. Although potatobreeding programs share some priorities, the major objective is to increase the genetic potential for yield through breeding or to eliminate hazards that reduce yield. Glycoalkaloids, which are considered a serious hazard to human health, accumulate naturally in potatoes during growth, harvesting, transportation, and storage. Here, we used the AMMI (additive main effects and multiplicative interaction) and GGE (Genotype main effect and genotype by environment interaction) biplot model, to evaluate tuber yield stability and glycoalkaloid content in six potato cultivars across three locations during 2012/2013. The environment on tuber yield had the greatest effect and accounted for 33.0% of the total sum squares; genotypes accounted for 3.8% and G×E interaction accounted for 11.1% which is the nest highest contribution. Conversely, the genotype on glycoalkaloid had the greatest effect and accounted for 82.4% of the total sum squares), whereas environment and G×E effects on this trait accounted for only 0.4% and 3.7%, respectively. Furthermore, potato genotype ‘Superior’, which covers most of the cultivated area, exhibited high yield performance with stability. ‘Goun’, which showed lower glycoalkaloid content, was the most suitable and desirable genotype. Results showed that, while tuber yield was more affected by the environment, glycoalkaloid content was more dependent on genotype. Further, the use of the AMMI and GGE biplot model generated more interactive visuals, facilitated the identification of superior genotypes, and suggested decisions on a variety of recommendations for specific environments.
        394.
        2017.09 KCI 등재 서비스 종료(열람 제한)
        The purpose of this study was to investigate the effects of envrionmental factors on the ecological responses, yield, and quality properties and physicochemical characteristics of yacon cultivated in various regions of Korea. Experiments were carried out in eight regions from 2010 to 2013. The temperature range in Jinbu, Bonghwa, Cheolwon, and Gangneung during the growth period of yacon cultivation was 17.5-24.6°C. The total yield and marketable yield of tuberous root in Jinbu were 4,065 and 3,196 kg/10a, respectively. The sugar content of yacon tuberous roots comprised 0.11-0.20% fructose, 0.11-0.37% glucose, 0.39-0.68% sucrose, 0.07-0.37% reducing sugar, and 7.03-9.62% fructo-oligosaccharides. The content of fructo-oligosaccharides, which is a functional substance, was the highest in yacon cultivated in Jinbu. Based on the productivity and functional fructo-oligosaccharides, the optimum areas to cultivate yacon are Jinbu and Bonghwa, which are located in the middle-highland zone (500-560 m) and have a suitable growth temperature of 18-25°C. The results of the present study indicate that temperature could be the factor with the greatest influence on the root growth of yacon.
        395.
        2017.09 KCI 등재 서비스 종료(열람 제한)
        Knowledge of the chromosomal constitution of the ancestors of modern soybean will complement plant breeding efforts to improve agronomic and economic characteristics of soybean. Variation block (VB)-based comparison using genome-wide insertion/deletion (InDel) markers was used on a diverse panel of 147 soybean cultivars to assess the impact of chromosomal changes during modern breeding. There were identical variation patterns of the examined InDels consistently appearing in the genome parts arising from parental varieties, indicating that soybean chromosomes in descendants should be all determined by genetic reshuffling of VBs inherited from parental chromosomes. Structure analysis of the accessions through the 202 InDels separated the accessions into four subgroups. Gene introgression revealed by the structure analysis agreed with the fact that a limited number of landraces and elite varieties were introduced and used as donors for breeding soybean cultivars in pedigree analysis. Especially, VBs became more reshuffled over time as a result of the breeding process, which resulted in using breeding parents with new VB-types for improving the end-use value of soybean. Therefore, their clustering using the 202 VB-specific InDels is strongly influenced by the difference in breeding ancestors among the subgroups. This indicates that the 202 InDel markers are very useful for genetic study by analyzing the reshuffling patterns of the parental genomes in the descendant.
        396.
        2017.09 서비스 종료(열람 제한)
        In the case of VOCs, it is known that the removal can be realized through the use of titanium dioxide (TiO2) photocatalyst. The experimental results reveal that VOCs removal efficiency for Mortar with Photocatalyst powder was effective and It was different depending on the Photocatalyst types.
        397.
        2017.06 KCI 등재 서비스 종료(열람 제한)
        To establish cultivation areas for the stable production of yacon, this study investigated the productivity and functional component contents of yacon in eight regions of Korea from 2011 to 2013. The results of principal component analysis using these data were as follows. A survey of 16 agricultural traits and meteorological data in the eight yacon cultivation areas showed that five factors (average temperature, maximum temperature, minimum temperature, frost-free days, and fructooligosaccharide content) were highly significant at the p < 0.001 level. Among the 16 agricultural traits and meteorological data used in the main component analysis of yacon cultivation areas, approximately eight contributed to the first principal component, and approximately four contributed to each of the second and third principal components. In particular, factors related to productivity, fructooligosaccharide content, and temperature change were considered important criteria for the classification of cultivation areas. The cultivation areas were divided into three groups by principal component analysis. In Group I, containing the Jinbu and Bonghwa areas in the mid-highland region at 500–560 m above sea level, the product yield was the highest at 2,622–3,196 kg/10a, the fructooligosaccharide content was also the highest at 9.04–9.62%, and the mean temperature was 17.3–18.5℃. In Group II, the areas Suncheon, Okcheon, Yeoju, and Gangneung, at 20–180 m above sea level, had the lowest yield, relatively lower fructooligosaccharide content, and the highest temperature. The areas in Group III showed values intermediate between those of Group I and Group II. For the different yacon cultivation areas, the product quantity and fructooligosaccharide content differed according to the environmental temperature, and the temperature conditions and number of frost-free days are considered important indicators for cultivation sites. Therefore, in terms of producing yacon with high quality, cultivation at 500–560 m is considered to give a higher yield and functional fructooligosaccharide content.
        398.
        2017.06 KCI 등재 서비스 종료(열람 제한)
        The increase in the frequency of occurrence of abnormal weather could include severe rainfall, which could cause rice submergence during the ripening stage. This experiment was conducted to clarify the effects of submergence during the ripening period on yield and quality of rice. The flooding treatment was conducted at 7 and 14 days after heading. Flooding conditions were created with two conditions, flag leaf exposed and overhead flooding, and each condition was divided into two conditions according to water quality—clear and muddy. Although the yield decrease was more severe at 7 days after heading because of the decrease in the ripening ratio, the head rice ratio was more affected at 14 days after heading because of the increase in the chalky kernel ratio. The maximum quantum yield (Fv/Fm), which indicates the photosynthetic efficiency, did not differ before and after the flooding treatment until flooding continued for 4 days. In addition, stem elongation occurred because of flooding as an avoidance mechanism in japonica rice. This phenomenon was expected to decrease the supply of assimilation products to the spikelet (sink). Overall, it was suggested that additional experiments should be conducted examining the change in the starch synthesis mechanism and transfer of assimilate products resulting from submergence, for development of cultivation techniques corresponding to submergence and breeding of varieties with submergence tolerance characteristics.
        399.
        2016.10 KCI 등재 서비스 종료(열람 제한)
        This study was carried out to design New Certification of Floral Arrangement based on the National Competency Standards to Using Competency Map. Currently the industrial base certification systems, not academic base, are emphasized. Because the industrial base certification system were derived by job analysis of industrial sites. The data were gathered by direct survey on industrial fields and internet homepages of HRD Korea and Q-net etc. and verified by brainstorming on the expert FGI and interview on the flower design industries. Certification events were 2 items such as ‘Unit Floral Arrangement L2’ and ‘Unit Floral Arrangement L4’, and critical duties and optional duties, and levels and required study time were derived. And Competency Map and lifecycle certification development paths were conducted, and the objectives and subjects, required time of education and training for expert and qualification of technical certification. In this study result, the certifications upto level 5 were suggested, if social and legal system would be served the certification level 8 or below could be developed and suggested. Finally news jobs, such as spatial floral arrangement and eco-friendly floral arrangement, are needed to be suggested and competency maps inked into unit flower design and certification events were developed.
        400.
        2016.09 KCI 등재 서비스 종료(열람 제한)
        The effects of weather variations on winter hulless barley were analyzed using data obtained from winter crop situation test at Iksan from 1985 to 2015. The wintering stage in the 16 years from 2000 to 2015 has become colder and shorter than that in the previous 15 years from 1985 to 1999. This has resulted in an early sequence of regrowth date, heading date, and ripening date. Heading date of hulless barley was mostly influenced by regrowth date and period of stem elongation. Futher, the regrowth date and period of stem elongation were strongly negatively correlated with the average air temperature in February and the maximum air temperature in March, respectively. The number of spikes per m2 and 1000-grain weight of Saechalssal cultivated from 2003 to 2015 showed strong positive correlations with yield. In early heading years, yield increased with extended ripening period and with increased 1000-grain weight. There was a strong negative correlation between 1000-grain weight and the average temperature during the ripening period. In the 15 years from 1985 to 1999, warm winters contributed to yield increase with increase in the number of spikes per m2 and a long ripening period. In contrast, in the recent 16 years from 2000 to 2015, the large variability in air temperature during the wintering stage, the decreasing number of spikes per m2 and the steadily increasing air temperature and decreasing precipitation during the ripening stage have caused high temperature stress and yield loss in late heading years.