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'스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.
배경 및 목적: 본 연구는 전자구개도를 사용하여 한국어의 치경마찰음인 /ㅅ/와 /ㅆ/를 조음운동적 측면에서 비교 분석해보고, 치경마찰음 조음 시 나타나는 혀-구개 접촉에 관한 정보를 제공하기 위한 목적으로 시행되었다. 방법: 한국어가 모국어이며 발음에 문제가 없는 정상 성인 5명이 전자구개도를 착용하여 치경마찰음을 분절음 차원에서뿐 아니라 단어 내 위치 및 모음문맥을 달리하여 녹음한 후 팰라토그램을 분석하였다. 결과: 그 결과, /ㅅ/와 /ㅆ/는 협착의 너비와 혀-구개 최대접촉구간에서 유의한 차이를 보였다. /ㅆ/에서 협착의 너비가 더 좁고 전체 혀-구개 접촉구간은 더 넓게 나타났다. 단어 내 위치에 따른 차이는 유의하지 않았지만, 고모음인 /ㅣ/ 문맥에서는 저모음인 /ㅏ/에 비해 협착의 위치가 후방화되었으며, 지속시간도 가장 긴 것으로 나타났다. 또한 혀-구개 접촉 구간도 가장 넓게 나타났다. 논의 및 결론: 본 연구는 전자구개도를 사용하여 한국어 치경마찰음의 혀와 구개 접촉에 관한 정보를 제공했다는 점에서 그 의의를 갖는다. 또한 본 연구의 결과는 한국형 전자구개도의 개발의 기초자료로써 그 의미가 있다. Objectives: The present study is aimed an electropalatographic investigation of Korean fricatives /s/ and /s*/. All data from this study is based on the production of 5- adult speakers who speak Korean as their first language. Methods: Electropalatography (EPG) is an instrumental technique for showing tongue and palate contact during speech. The participants recorded /s/ and /s*/ in CV (/si/, /sɑ/, /su/, /s*i/, /s*ɑ/, /s*u/) and VCV (/ɑsi/, /ɑsɑ/, /ɑsu/, /ɑs*i/, /ɑs*ɑ/, /ɑs*u/) context using EPG and then, four variables were analyzed: row of medial groove (RMG), medial groove width (MGW), medial groove length (MGL), and maximum contact frame (MCF). Results: There was significantly greater medial groove width and maximum contact frame for / s*/ compared to /s/. The difference between /si/ and /sɑ/ was also found in the row of medial groove, medial groove width and maximum contact frame. /si/ was produced further back, and had a longer medial groove length. Also, it showed more total tongue-palate contact than /sa/. Conclusion: A various range of palatal contact patterns were found between typical adults for perceptually normal /s/ and /s*/. The results provided the information about tongue–palate pattern of Korean fricatives /s/ and /s*/. These findings would be utilized to build the basic data and useful information for Korean EPG system.
It has been reported several viral diseases in soybean. The occurrence of Bean common mosaic virus and Peanut stunt virus are able to induce severe problem because the main breeding target for viral disease was focused on Soybean mosaic virus. BCMV is a spcies of the genus Potyvirus of the family Potyviridae. BCMV reduces yield by as much as 80% and also adversely affects seed quality in common bean. BCMV has a worldwide distribution because of its high rates 35% of transmission via seeds produced by plants systemically infected prior to bloom. PSV is a species of the genus Cucumovirus of the family Bromoviridae. PSV has been reported to be economically damaging on beans worldwide. Although the virus is reportedly seed transmissible at very low rates, infected plants rarely produce pods with normal viable seeds. The most satisfactory management method of viral diseases such as BCMV and PSV is the use of resistant cultivars and healthy seed. For the overcome of genetic resistance by new virus such as BCMV and PSV, virus diseases monitoring and researches need to study deeply and continually. In this study, we conducted the resistance screen on BCMV and PSV for selection of resistance cultivars. We inoculated on 128 cultivars with PSV and BCMV respectively. These cultivars were classified through pathogenic response such as resistance, necrosis and susceptibility. In addition, 99 and 66 resistant cultivars were confirmed against PSV and BCMV respectively.
This study was carried out to identify lactic acid bacteria in Mul-Kimchi and Dongchimi using by 16S rRNA and 16S-23S gene sequence analysis. Diluted Mul-Kimchi and Dongchimi soup were plated on the MRS agar media and colonies obtained were used for 16S rRNA and 16S-23S rRNA gene sequence analysis. Genomic DNAs were extracted from the isolated lactic acid bacteria and used as a template for PCR amplification. Universal primer sets based on the 16S rRNA and 16S-23S intergenic spacer region genes were used for amplification. From the sequencing of PCR products, Weissella kimchii, Weissella cibaria, Leuconostoc lactis, Leuconostoc citreum and Leuconostoc garlicum were identified.
이 연구는 오·폐수에 함유된 유기물을 제거하기 위하여 일반 시멘트 콘크리트에 비해 우수한 역학적 성질을 갖는 폴리머를 이용한 현무암 다공질 석재를 개발하고, 이에 대한 물리. 역학적 특성 및 정화성능을 실험적으로 구명한 것이다. 그 결과 다공질 소재이나 강도가 높고 적당한 단위체적중량을 갖기 때문에 설치 후 안정성을 확보할 수 있고, 정화성능은 나일론 여재에 비해 떨어지지 않으므로, 현장 설치 및 시공방법에 대한 연구가 이루어질 경우 실용화가 가능할 것으로 판단된다. The objectives of this study were to develop porous media for sewage treatment facility using basalt and to explore the possibility of replacing wall structures of sewage treatment plants improve the efficiency of sewage treatment. It was shown that the porous media developed by using basalt was not as efficient as existing media. However, it is expected that the polymer porous media can be economically applied to existing waste treatment plants and help improve sewage treatment efficiency.
'스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.
Alpha-fetoprotein(AFP) is a major plasma protein synthesized by the fetal liver, york sac, and gastrointestinal tract. There were many reports that elevated AFP levels in maternal serum and amniotic fluid have been associated with fetal distress and intrauterine fetal death, and recent studies demonstrates a high association between elevated AFP levels in maternal serum and umbilical cord blood and subsequent neonatal jaundice in normal healthy fullterm infants. To investigates the relationship between serum AFP and bilirubin levels of the newborn infants, the authors determind maternal serum and umbilical cord blood AFP concentration in 26 cases of normal healthy fullterm infants and their mothers, The serum AFP levels were measured by the method of enzyme immunoassay(AFP-EIA kit, USA) The results observed are summerized as follows: 1. The mean serum AFP levels of the newborn infants and their mothers were 27227.285ng/㎖ and 161.09ng/㎖, respectively and there was significant correlation between serum AFP levels of the newborn infants and their mothers, (Y= 14.598x+25646.955, r=0.1627, P<0.1627, p<0.005) 2. The mean serum AFP levels of the mothers and mean serum bilinibin levels of the newborn infants were 161.09ng/㎖ and 1.19ng/㎖, respectively and there was significant correlation between serum APP levels of the mothers and serum bilirubin levels of the newborn infants (Y=0.000032x+0.2831, r=0. 272491, P<0.005)
When a transmission congestion occurs in a special transmission line, system network is divided into two Zone. Korea Power System has especially the "Northward Flow". If Korea Power System should introduce the nodal prices, we would regard Korea Power System as two Zone system. The Similarity Index is a good performance measure for the network reduction. It can be applied to the network reduction in the zone categorized by the nodal prices. This paper deals with a zonal reduction method based on the similarity indices. The proposed method was verified by IEEE 39 bus test system.