• Journal of the korean academy of Pediatric Dentistry
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• v.36 no.1
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• pp.78-83
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• 2009

In case of endodontic treatment and extensive restoration of severe dental caries, trauma, and developmental defect, esthetic restoration of primary incisors and permanent anterior teeth for children and adolescents period is delicate matter for pediatric dentists. Existing restorative methods for anterior teeth have retentive and esthetic limitations for badly damaged teeth, especially for the adolescent anterior teeth. Therefore, the preparative stage for setting the permanent prosthesis as well as the retention and esthetics have to be considered. In this case, esthetic restoration for badly destroyed anterior teeth was tried with fiber-reinforced post and the result was satisfactory.

• Journal of Korean Medical classics
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• v.18 no.3 s.30
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• pp.1-8
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• 2005

${\lceil}$소문(素問) 장기법시론(藏氣法時論)${\rfloor}$적오장병지일중간심적주석중(的五藏病的日中間甚的注釋中), 관어비병여폐병정적주석(關於脾病與肺病靜的注釋), 가분이하삼조(可分以下三條), 기일시(其一是), 비병정(脾病靜), 당작일중정(當作日中靜), 폐병정(肺病靜), 당작일질정, 기이시(其二是), 하포여야반(下哺與夜半), 제기적사(制其賊邪), 소이병정(所以病靜), 기삼시(其三是), 자어자기왕(資於子氣旺), 모기역왕(母氣亦旺). 논자이기지경향성해석본문(論者以氣之傾向性解釋本文), 기내용여하(其內容如下), 기일시(其一是), 평단여간유동양적기지경향성(平旦與肝有同樣的氣之傾向性), 소이병상(所以病爽). 하포여간유상반적기지경향성, 소이병심(所以病甚). 야반시보충간지기(夜半是補充肝之氣), 소이병정((所以病靜), 기이시(其二是), 일중여심(日中與心), 기기능유사(其機能有似), 소이병상(所以病爽). 야반여심(夜半與心), 유상반적기류(有相反的氣流), 소이병심((所以病甚). 평단보심적활동(平旦輔心的活動), 소이병정(所以病靜). 기삼시(其三是), 일질여비공유화적특성, 소이병상(所以病爽). 일출여화(日出與化), 유상반적기지특성(有相反的氣之特性), 소이병심((所以病甚). 하포시수렴적시기, 유관여화적작용(有關與化的作用), 소이병정(所以病靜). 기사시(其四是). 하포여폐, 공유수렴적특성(共有收斂的特性), 소이병상(所以病爽). 일중유상반적기류(日中有相反的氣流), 소이병심(所以病甚). 야반여금(夜半與金), 공유음적기류(共有陰的氣流), 소이병정(所以病靜). 기오시(其五是), 야반여신(夜半與 腎하), 공유장적기능(共有藏的 機能), 소이병상(所以病爽). 사계포용만물(四季包容萬物), 여장정미적신(與藏精微的腎), 유상반적특성(有相反的特性), 소이병심(所以病甚). 하포유수렴숙살기능, 보신지장적기능(補腎之藏的機能), 소이병정(所以病靜). 신병심적시기(腎病甚的時期), 작사계이불작일질, 저취설명료 신병적위중성(這就說明了 腎病的危重性).

• KOREAN JOURNAL OF CROP SCIENCE
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• v.25 no.3
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• pp.59-62
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• 1980

An artificial lodging was made at various growth stages of the rape varieties Yongdang and Mokpo 29 to evaluate its effect on seed yield and other important agronomic characters. Results showed general increases in plant height and number of branches per plant whereas reductions in 1.000 grain weight, number of pods and seeds per plant in the severly lodged plots. As compared to control of lodging, about 29 percent yeild reduction was caused by the severe lodging treatment. Further more, the most severe lodging before blooming resulted in about 60% yield losses.

• Horticultural Science & Technology
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• v.17 no.1
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• pp.11-14
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• 1999

This experiment was conducted to estimate seasonal changes in the properties and chemical components of xylem sap from 'Hayward' (Actinidia chinensis Planch) and wild kiwifruit species (Actinidia aguta Sieb. et Zucc. Planch) in 1996 and 1997. Amount of bleeding sap from kiwifruit vines considerably decreased with collection time in both species. There was no difference in water content, soluble solid content, viscosity, and pH of the sap between 'Hayward' and wild species, while turbidity and organic acid contents were much higher in 'Hayward'. Fructose content was highest among free sugars, followed by glucose, sucrose, galactose and manitol in 'Hayward', but only low concentration of fructose and glucose was detected in wild species. The major inorganic components in the sap were calcium, potassium, and magnesium, and calcium was dominant among them. The saps of 'Hayward' and wild species were composed of 17 kinds of amino acids respectively, and major amino acids were glutamic acid, lysine, and isoleucine. Glutamic acid content was highest in both species and except histidine, contents of methionine and tyrosine were much higher in 'Hayward' than wild species. Concentrations of inorganic elements and amino acids were slightly increased with delaying collection time, but sugar contents decreased.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.40 no.1
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• pp.44-51
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• 1995

This investigation was conducted to determine the effect of the optimum planting date and place for good seed production on growth variation, grain yields, different of variety, infection of seed by fungi, and seed germination and vigor after room storage. Early maturity Korean soybean variety, Keunolkong, and introduced vegetable soybean variety, Fukura-edamame, were planted at field of YAES. and high cool land of Sajapyong in Milyang（altitude, 850m） on May 15 （early）, June 15 （mid.）, and July 15 （late） in 1991. The emergence and vegetative period gradually increased in the early planting date. The grain yield, seed weight, pod number, healthy grain yield also increased when Keunolkong was planted on early date. The healthy seed rate, Keunolkong increased in the early planting date, whereas that of Fukura also increased in the late planting date. Infection ratio of grain to phomopsis seed decay （Phomopsis spp. ' Diaporthe phaseolorum） in Fukura steadily increased in the early planting date. Infection ratio of grain to purple seed stain （Cercospora kikuchii） generally increased in the mid and late planting date. The seed germination and seedling vigor after room storage from five to six months gradually increased in the late planting date. And seed germination of Fukura rapidly decreased in the early planting date. Therefore, the optimum planting date for good seed production in early maturity vegetable soybean was June 15 in terms of harvesting time avoid a high temprature and humidity.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.2 no.2
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• pp.101-109
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• 1997

The present study was carried out to investigate the temporal and spatial changes in species composition and abundance of polychaetes in Lake Shihwa. Macrobenthic fauna were collected from eight sampling surveys performed in March, June, September and December of 1994, March and October of 1995, February and August of 1996, using a modified van Veen grab with 0.1 $m^2$ coverage area. Polychaete worms, the most abundant macrofaunal group, comprised of 1~22 species at each investigation; number of species continuously decreased during the survey period. The mean density of polychaete was $794{\pm}1,275\;indiv.{\cdot}m^{-2}$ and showed a large fluctuation over time. The variation in abundance was mainly coupled with the domination of Polydora ligni occupying 83% in total density. The next dominant species were Pseudopolydora kempi (mean density of 31 $indiv.{\cdot}m^{-2}$) and Capitella capitata (mean density of 23 $indiv.{\cdot}m^{-2}$). Abundant polychaetes in Lake Shihwa are known to be tolerant to sediment pollution. Ecological indices such as diversity (H') and dominance (D) also indicated that the number of species significantly decreased and a few species predominated in Lake Shihwa after the dike construction. The azoic zone were extended from the upper reach of Lake Shihwa to the vicinity of the dike over time. The reduced number of species, predominance of pollution indicator species and development of an azoic zone reflect severe deterioration of benthic environments in Lake Shihwa.

• Korean Journal of Weed Science
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• v.10 no.4
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• pp.261-268
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• 1990

Various herbicides were applied to the young rice seedling from which endosperm were removed and their effects were determined at 40 days after transplanting. Generally, growth was retarded, but the number of tillers was not effected. Application of bensulfuron and pretilachlor showed slight growth inhibition compared to dimepiperate and pyrazolate. Injury due to herbicide application was dependent on the transplanting depth. Injury was severe when pretilachlor and pyrazolate were applied to rice transplanted 0 and 4cm deep, respectively. However, bensulfuron showed much injury regardless of transplanting depths with the tendency of general growth retardation. Dimepiperate was fairly safe at all transplanting depths. The application of herbicides at 3 and 6 DAT showed higher injury than that at g and 12 DAT. The degree of injury was severe when pretilachlor and bensulfuron were applied.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.33 no.2
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• pp.182-188
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• 1988

In order to find out the effects of the time and degree of defoliation on the seed yield, oil content and fatty acid composition of perilla seed, two cultivars, Namhae and Geumnung, were grown in two years, 1985 and 1987. Defoliation was initiated after 110 days from sowing with two-week interval. Defoliation degree was manipulated into four levels i.e. 0, 25, 50 and 75 per cent based on the total leaf area per plant. The results are summarized as follows: Flowering date, maturing date, culm length, culm diameter and branch numbers were not significantly influenced by the defoliation time and degrees, but by the cultivars. The higher levels of defoliation was made, the lower seed yield and 1000-seed were obtained, and either the earlier or the later time of defoliation, the less influence on seed yield were observed for both cultivars. Severe defoliation caused a significant decrease in oil content. The composition of unsaturated and saturated fatty acids was significantly decreased by severe defoliation (above 25 per cent). In conclusion, with a view to achieving higher seed yield and oil content with good quality, it is advisable to defoliate perilla leaf less than 25 per cent based on total leaf area at either or later growth stages.

• Journal of Korea Water Resources Association
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• v.55 no.12
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• pp.1125-1135
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• 2022

Damages by heavy snow does not occur very often, but when it does, it causes damage to a wide area. To mitigate snow damage, it is necessary to know, in advance, the depth of snow that causes damage in each region. However, snow depths are measured at observatory locations, and it is difficult to understand the spatial distribution of snow depth that causes damage in a region. To understand the spatial distribution of snow depth, the point measurements are interpolated. However, estimating spatial distribution of snow depth is not easy when the number of measured snow depth is small and topographical characteristics such as altitude are not similar. To overcome this limit, satellite images such as Synthetic Aperture Radar (SAR) can be analyzed using Differential Interferometric SAR (DInSAR) method. DInSAR uses two different SAR images measured at two different times, and is generally used to track minor changes in topography. In this study, the spatial distribution of snow depth was estimated by DInSAR analysis using dual polarimetric IW mode C-band SAR data of Sentinel-1B satellite operated by the European Space Agency (ESA). In addition, snow depth was estimated using geostationary satellite Chollian-2 (GK-2A) to compare with the snow depth from DInSAR method. As a result, the accuracy of snow cover estimation in terms with grids was about 0.92% for DInSAR and about 0.71% for GK-2A, indicating high applicability of DInSAR method. Although there were cases of overestimation of the snow depth, sufficient information was provided for estimating the spatial distribution of the snow depth. And this will be helpful in understanding regional damage-causing snow depth.

• Research in Plant Disease
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• v.8 no.4
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• pp.254-257
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• 2002

It was conducted to investigate an effective control measure of the black necrotic leaf spot disease on pear, The disease commonly occurred in major cultivation areas of Korea revealed 5.6 ％ infection rate on the widely growing cultivar Niikata. The disease substantially reduced yield and quality of pear fruits, however, it has never been controlled by chemicals. Renewal of the pear trees to resistant cultivar was found to be the most effective to control the disease. As a result, the disease did not developed for 2 years on the diseased Niikata that was top-grafted with resistant cultivars Soowhang and Whasan. lop-grafting with resistant cultivars was recommended far the pear trees showing over 80％ infection rate and lower than 70% fruit yield compare to standard production.