• The Journal of the Petrological Society of Korea
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• v.14 no.1
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• pp.24-37
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• 2005

In this study we examined the geomorphological and geological characteristics of the granite landforms in the Iksan area. Moreover we investigated the source areas of stones which are used to build the Mieruksaji west stone pagoda. Joint is most identifiable geomorphological and geological structure in the Iksan area. Direction of J1 joint appears to be N71°E∼EW, and that of J2 joint ranges N20°W∼N20°E. Cross-pattern joint is predominant in the study area, and linen.-pattern vertical joint is also observed. Tor and corestone are easily found as geomorphological features in the study area. Corestones forming for are almost 2∼3 m across and 2∼3 m or over 5 m high. Their hardness is mainly of hammer bounce. Tower-type and castle-type of for are characteristic in the Mireuksan granites. Other geomorphological features such as tafoni, gnamma are also observed in the study area. Petrographical and geochemical features of the stones used for the Mireuksaji west stone pagoda are compared with those of the granites cropped out nearby, and indicate that the stones from the Mieruksaji west stone pagoda are quite similar to the Mireuksan granites. In the Mireuksan we can easily find lots of old traces for rock cutting.

• Journal of Animal Science and Technology
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• v.46 no.5
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• pp.735-742
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• 2004

This study was conducted for the identification of pure Landrace, Large White and Duroc breeds which are mainly maintained in Korea using DNA markers. We used known KIT and MC1R mutations, which were related coat color in pigs, and pig mitochondrial DNA variations. The KIT mutation was used to distinguish white and colored animals. Duroc breed could be discriminated from other colored breeds using the MC1R mutation N121D. Discriminating Landrace and Large White was possible using the l l-bp duplication of D-Ioop region and alternative initiation codon of ND2. In conclusion, identification of Landrace, Large White and Duroc breeds was might be possible using the procedure designed in this study.

• Journal of Korea Water Resources Association
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• v.54 no.12
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• pp.1295-1304
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• 2021

For the efficient use and management of water resources, a reliable rainfall-runoff analysis is necessary. Still, continuous hydrological data and rainfall-runoff data are insufficient to secure through measurements and models. In particular, as part of the reasonable improvement of a rainfall-runoff model in the case of an ungauged watershed, regionalization is being used to transfer the parameters necessary for the model application to the ungauged watershed. In this study, the GR4J model was selected, and the SCEM-UA method was used to optimize parameters. The rainfall-runoff model for the analysis of the correlation between watershed characteristics and parameters obtained through the model was regionalized by the Copula function, and rainfall-runoff analysis with the regionalized parameters was performed on the ungauged watershed. In the process, the intermediate state variables of the rainfall-runoff model were extracted, and the correlation analysis between water level and the ground water level was investigated. Furthermore, in the process of rainfall-runoff analysis, the Standardized State variable Drought Index (SSDI) was calculated by calculating and indexing the state variables of the GR4J model. and the calculated SSDI was compared with the standardized Precipitation index (SPI), and the hydrological suitability evaluation of the drought index was performed to confirm the possibility of drought monitoring and application in the ungauged watershed.

• Korean Journal of Plant Taxonomy
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• v.43 no.4
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• pp.319-331
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• 2013

Records found on labels of specimens deposited at Kyoto University (KYO) and references about three Japanese taxonomists, Koidzumi, Gen'ichi (1883-1953), Ohwi, Jisaburo (1905-1977), Kitamura, Siro (1906-2002) were assembled to produce collector's itineraries from 1930 to 1935 in Korea. The quality of data on labels of the specimens varies, but most are only the collector's name and country of collection, often, the locality data are only textual, and the Chinese and Japanese names, as well as the ethnic dialects common to the region, varies widely. It is estimated that approximately 2,000 specimens collected from Korea by three taxonomists are currently held within the collections of Kyoto University herbarium (KYO). Koidzumi, who was the professor of Kyoto University, traversed different northern parts of the country, such as Island Jeju-do, Mt. Keumkang-san, Hamkyongbuk-do during summer (July to August) in 1932, 1933, and 1935. In 1930 and 1932, Ohwi spend three months in the unexplored mountains in northern parts, such as Hamkyeongnam-do, Hamkyeongbuk-do, and Gangwon-do. On the other hand, for two months in the middle of 1935 visited Jeju-do, Mt. Jirisan and travelled through southern parts. Unlike two previous botanists, major collections in Korea by Kitamura took place twice in one major area in northern part and Jeju-do and Mt. Keumgang-san in 1930, 1932, and 1935.

• Journal of Korean Society of Forest Science
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• v.57 no.1
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• pp.20-25
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• 1982

This study was carried out to investigate the changes of forest land use around Tae Kwan Ryoung region during 15 years, by using the aerial photographs in 1965 and 1980 respectively. the results are summarized as follows: 1) The areas of forest land and farm land has been decreased, while the grass land increased as 3 times. It is because that the site of Tae Kwan ryoung region was suitable for livestock breeding and the wide grass lands were developed. 2) With a view to forest land use, it is desirable to convert the forest land into grass land and farm Land. But it should be considered the fact that most of the farm land was converted into forest land, in the utilization of forest land in future. 3) Due to the development of industries such as livestock breeding and leisure industry, there is a great increase in the dwelling houses, stalls, public building and habitants in this region. Therefore, in future we should establish the plans of forest land use synthetically and efficiently, considering the promotion of indirect utilities such as soil conservation, recreation and environmental protection as well as timber production.

• Proceedings of the KIEE Conference
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• 2003.07a
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• pp.166-168
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• 2003

전력계통의 안정운용을 위하여 대용량 발전소와 주요 345kV 전력소로부터 시각 동기화된 계통 운전자료를 온라인으로 취득하여 계통 안정성을 실시간으로 감시, 분석할 수 있는 전력계통 온라인 안정성 감시, 분석시스템을 개발하였다. 전력계통 온라인 안정성 감시, 분석시스템은 크게 Master 시스템과 Local 시스템으로 구성된다. Local 시스템은 시각동기 데이터 취득시스템(TSDS)이라고도 하는데, GPS를 이용한 시각 동기화된 계통 운전데이터를 측정하고, 지역사고 판단 및 사고데이터를 기록하며, 측정/기록데이터를 Master 시스템으로 온라인 전송해주는 역할을 한다. Master 시스템은 각 Local 시스템에서 전송되어진 측정/기록데이터를 수집하고, 광역사고 판단 및 사고데이터를 기록하며, 과도안정도를 온라인으로 평가해주는 역할은 한다. 현재 1단계 연구결과로서 울진, 영광, 고리 원자력발전소와 동서울,신제천,청양,아산,신옥천 전력소 등 총 8개소에 Local 시스템 설치 및 시운전이 완료되었고, 한국전력거래소(KPX)에 설치된 Master 시스템을 이용하여 TSDS의 확대적용을 위한 활용성 검증작업을 진행하고 있다.

• Journal of The Korean Society of Grassland and Forage Science
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• v.23 no.1
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• pp.65-70
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• 2003

This study was conducted to select the promising varieties of alfalfa (va.) Venal, Ancho., P5444, DK120, DK125, Horizon, DK135, Luna and Kitawacaba at Daekwanryong branch(altitude 800m a.s.l.) and Namwon branch(altitude 450m a.5.1.) of National Livestock Research Institute Leaf width of alfalfa was broad in all varieties except fer Vernal, and DK125 was flowered the earliest of all varieties. Plant height of Luna was the longest, and winter hardness of P5444 was the greatest with 80.2% of all varieties. In Daekwanryong, dry matter(DM) yield of Luna was the highest and DM yield of vernal was the lowest among the varieties in Namwon. In both areas, dry matter yield ef P5444 was the highest of alfalfa varieties. In Daekwanryong, ADF and NDF concentrations of DK 120 were the lowest of all alfalfa varieties. In Namwon, ADF concentrations of Horizon was the lowest with 26％, and NDF concentrations of DK 125 and Horizon was the lowest with 40.8%. Crude protein concentrations of P5444, Luna and DK 120 were higher than that of different varieties in Daekwanryong and crude protein content of Horizon was the highest with 28.1% in Namwon. Average crude protein yield of both areas was the highest of P5444. The results of this study indicated that Luna, Horizon and P5444 would be the promising alfalfa varieties in Daekwanryong, Namwon and both areas, respectively.

• Journal of agricultural medicine and community health
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• v.3 no.1
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• pp.35-41
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• 1978

Clonorchiasis sinensis is the most important endemic disease in In Korea, and this disease has been known to be one of public health concern in mary areas of southern part of Korea. This survey was undertaken to evaluate the status of clonorchiasis in Eui-Seong Gun, Kyungpook Province from March 1974 to August 1974. A total number of 3,771(male 2,037. female 1,734) consisting of 2,948 primary school children, 774 middle school students, 49 high school students were examined by the intradermal test with clonorchis antigen. In order to detect clonorchis egg, the stool examinations were undertaken on the residents in Bong Yang Myun. And, the intensity of the clonorchis infection was estimated by the Stoll's egg count. The following results were obtained in this survey; 1. As a whole, 6.0 per cent of the examiners showed positive reaction by the intradermal test (male 8.0%, female 3.6%). 2. Among 249 residents in Bong Yang Myun, the prevalence rate of clonorchis eggs was shown as 45.8 per cent. 3. The mean E. P. G. in Bong Yang Myun 114 inhabitants was 2,197. 4. The degree of the intensity of clonorchis infection by E. P. G. counts was distributed to the light (50.9%) medium (43.9%) and heavy infection groups(5.3%).

• Korean journal of applied entomology
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• v.36 no.2
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• pp.156-165
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• 1997

Host plants and host preference of brown chafer, Adoretus tenuimaculatus Waterhouse (Coleoptera: Scarabaeidae) were investigated in fields and laboratory. 66 kinds of plants in 25 fanlilies were recorded as host during the field survey and 14 kinds in 5 families were verified to be eaten by artificial plant supply. Thus, host plants of A. tertuimaculatus were 186 kinds in 42 families in total including 136 kinds of plants in 32 families from literatures. 50 plants in 19 families were newly recorded as host of A. tenuimaculatus in this study. A. tenuimaculatus was the most frequently visited to J14glans sinensis and Caztanea crenata was the highest damaged plant. C. crenata, Robinia pseudoacasia, Malus sieboldii, J. sinensis, Quercus mongolica, and Q. aliena were considerably highly preferered host plant. However, A. tenuimaculatus never visited to Diospyros lotus, J. nigra, Fraxinus mandshurica, F. rhynchophylla, Pyracantha angustqolia, Paulownia coreana, and Celtis sinensis. Even the same host plant of A. tenuimaculatus. preference was different according to observed place and damage level was also different depending on observed place and time.

• Journal of The Korean Society of Grassland and Forage Science
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• v.23 no.4
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• pp.289-292
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• 2003

A series of three separate experiments was contucted to investigate the effect of working time quality and animal palatability of barley whole crop silage by trench and round bale in paddy field of Central and Northern region from 1999 to 2001. Dry matter yield of trench and round bale silage was 12,562 and 12,555 MT per ha, respectively. Quality and animal palatability of silage by trench was slightly higher than those by round bale. Work time of trench silage and bale silage per ha were 4.9 and 5.7 time. Silage making areas by trench and round bale were 4 and 3ha per day, respectively, The results demonstrated that silage making by round bale was good for production cost over 7 working days.