• Journal of The Korean Society of Grassland and Forage Science
• /
• v.12 no.3
• /
• pp.64-129
• /
• 1992

최근 초지중심 사양형태의 증가와 초지면적의 확대에 따라 단순한 사료로서가 아니라 영양가치가 높고 기호성이 높은 목초생산이 요구되고 있다. 그러나, 고위생산을 위해 다량으로 사용된 질소질비료에 의하여 질산태 중독 등의 문제가 야기되고 있어 목초의 생리 및 영양에 관한 연구가 필요하게 되었다. 사료성분 혹은 영양가치에 대한 연구는 이미 일찍부터 다루어져 왔으나, 주로 야초류, 청예작물 및 농가부산물 등의 일반성분 특히, 조단백질과 조섬유함량의 연구가 주가 되었고 다년생 목초류에 대한 연구는 1975년경부터 본격화 되기 시작하였다. 그동안 한국초지학회지와 축산학회지($1972\sim1991$)에 게재된 총 151편의 생리 및 영양에 관한 연구 중에서 다년생 목초류를 취급한 것은 불과 63편에 머물고 있다. 이 분야의 연구는 각종 목초 사료작물에 대한 재배조건과 생육단계에 따른 생리생태학적 연구와 사료성분, 소화율 및 가소화양분 함량의 일반적인 변화, 경향을 검토하여 사료 가치 평가를 위한 기준으로 삼았다. 그러나 다년생 목초류는 물론 사료 작물에 있어서 육종 생리분야의 연구는 매우 미흡한 상태로써 단지 발아, 생육, 저장탄수화물 및 유독성분 등 단편적인 연구만이 행해지고 있을 뿐이다. 또한 사료 성분이 가축의 기호성에 미치는 영향을 구명하기 위한 연구는 거의 이루어지고 있지 않으므로 금후 탄수화물과 미량 요소에 대한 자세한 연구 검토가 필요하다고 생각된다. 특히 목초와 사료작물의 화학적인 조성과 가축의 생리에 관련한 여러가지 문제들도 앞으로 보다 깊이 연구되어야 할 과제라고 생각된다.권을 잡기 위해 10년지기였던 IBM과 MS사는 각각 OS/2와 윈도즈를 내세우고 양보할 수 없는 힘겨루기에 들어갔다. 또 이들 양사는 펜컴퓨터,멀티미디어등 차세대제품의 운영체제 시장을 둘러싸고 일찍부터 격전에 들어갔으며 IBM과 MS사의 혼전을 틈타 썬마이크로시스템을 필두로한 워크스테이션 업체 및 유닉스진영까지 고성능 PC시장을 겨냥한 OS를 속속 개발, 90년대의 OS 전쟁은 한치 앞을 내다볼 수 없는 안개국면으로 접어들고 있다. DOS에서 32비트시대,펜컴퓨터, 멀티미디어에 이르는 차세대제품을 둘러싼 업계의 OS 쟁탈전을 통해 OS의 발전동향과 미래를 전망해 본다. results in the large change of the objective function, the sum of squares of deviations of the observed and computed groundwater levels. 본 논문에서는 가파른 산사면에서 산사태의 발생을 예측하기 위한 수문학적 인 지하수 흐름 모델을 개발하였다. 이 모델은 물리적인 개념에 기본하였으며, Lumped-parameter를 이용하였다. 개발된 지하수 흐름 모델은 두 모델을 조합하여 구성되어 있으며, 비포화대 흐름을 위해서는 수정된 abcd 모델을, 포화대 흐름에 대해서는 시간 지체 효과를 고려할 수 있는 선형 저수지 모델을 이용하였다. 지하수 흐름 모델은 토층의 두께, 산사면의 경사각, 포화투수계수, 잠재 증발산 량과 같은 불확실한 상수들과 a, b, c, 그리고 K와 같은 자유모델변수들을 가진다. 자유모델변수들은 유입-유출 자료들로부터 평가할 수

• Journal of the Korean earth science society
• /
• v.29 no.7
• /
• pp.539-550
• /
• 2008

In this paper, we investigate the geochemical and isotope properties of the Jeongeup foliated granite (hereafter, the JFG) in the Jeongeup area, aiming at establishing the movement age of the Honam shear zone by U-Pb sphene geochronology. In the AMF diagram, the JFG corresponds to the calc alkalic rock series, and belongs to the magnesia region in the diagram of silica versus $FeO^{total}/(FeO^{total}+MgO)$. Additionally, in the Rb-Ba-Sr diagram, it is classified as granodiorite and anomalous granite with distinctive negative Eu-anomaly in the REE patterns. According to the silica and trace element contents, the JFG falls on the type VAG+syn-COLG, which implies that this was formed under the circumstance of compressional continental margin or volcanic arc. $^{143}Nd/^{144}Nd$ isotope ratios range from 0.511495 to 0.511783 and $T_{DM}$ are calculated to be about $1.68{\sim}2.36Ga$. U-Pb sphene ages of the JFG are $172.9{\pm}1.7Ma$ and $170.7{\pm}2.8Ma$, based on $^{238}U-^{206}Pb$ and $^{235}U-^{207}Pb$ ages, respectively. Presumably, the dextral ductile shearing in the Jeongeup area has occurred after 173 Ma.

• Journal of Genetic Medicine
• /
• v.7 no.1
• /
• pp.37-44
• /
• 2010

Purpose : Kabuki syndrome is a multiple congenital malformation syndrome with mental retardation. It was named after its characteristic appearance, a face resembling that of an actor in a Kabuki play. To date, six Korean cases of Kabuki syndrome have ever been reported. Here, we present the phenotypic and genetic characteristics of six patients with Kabuki syndrome. Materials and Methods : Between 2003 and 2009, six Korean girls have been diagnosed and followed up as Kabuki syndrome at Center for Genetic Diseases of Ajou University Hospital. Their clinical and laboratory data were collected and analyzed by the retrospective review of medical records. Results : All six patients showed the characteristic facial dysmorphism and developmental delay. Persistent fingertip pads were also found in all patients. Most patients showed postnatal growth retardation (83.3%) and hypotonia (83.3%). Opthalmologic problems were common, particularly for strabismus (83.3%). Congenital heart defects were present in three patients (50%). Skeletal abnormalities including 5th finger shortening (83.3%), clinodactyly (50%), joint hypermobility (50%) and hip dislocation (16.7%) were also observed. There was no patient who had positive family history for Kabuki syndrome. Cytogenetic and molecular cytogenetic analyses including karyotyping and array CGH could not reveal any underlying genetic cause of Kabuki syndrome. Conclusion : Korean patients with Kabuki syndrome showed a broad spectrum of clinical features affecting multiple organ systems. Although clinical manifestations of Kabuki syndrome have been well established, our results failed to detect recurrent chromosome aberrations which could cause Kabuki syndrome. Its natural history and genetic background remains to be further studied for providing appropriate management and genetic counseling.

• Journal of the Korean association of regional geographers
• /
• v.20 no.3
• /
• pp.256-258
• /
• 2014

This paper aims at examining the role of university, industry and government, which constitute the triple-helix innovation system in hi-tech cluster, based on the case of the Research Triangle Park, North Carolina, USA. Firstly, the state government has played a catalytic role by building the horizontal governance of triple-helix actors. By doing so, the state government has made it possible for not only growing but also transforming the RTP as an high-tech cluster. Secondly, universities in the triangle area have played to some extent a limited role in sustaining the evolution of cluster. Thirdly, the RTP has long been dominated by a small group of large firms. However, the situation has been changed since 1990s, because new start-ups from universities and local large firms and the technology transfer activities between universities and firms have been increased in the RTP and its surrounding area. Finally, it argues that the continuous evolution of the RTP has been to some or large extent influenced by the transition from the exogenous development model to the endogenous development model.

• Applied Microscopy
• /
• v.28 no.4
• /
• pp.603-613
• /
• 1998

The present study was designed in order to observe relationship between the endoplasmic reticulum and the Golgi complex during spermiogenesis of the long-fingered bat (Miniopterus schreibersi fuliginosus). The testes were obtained from adult bats and treated with the prolonged osmification or fixed with ferrocyanide reduced osmiun. In the Golgi phase, The Golgi complex shows an oval shape, and was composed of a cortex and a medullar enclosing acrosome. The Golgi vacuoles with electron-dense granules of crescent shape were fused with each other. The smooth endoplasrnic reticulum was scattered in all the area of the cytoplasm. In the cap phase, The Golgi complex was crescent in shape, and faced to a nucleus. Large and small vesicles were fused with each other, and then fused with a acrosomal vacuole. The rough endoplasmic reticulum was close to the large Golgi vacuole. In the acrosome phase, The Golgi complex was moved to behind of the acrosome face. Small vesicles were fused with an acrosome, and cisternae of the trans-face of Golgi complex was connected with an acrosome in the early acrosome phase. The smooth endoplasmic reticulum was distributed in the cytoplasm. The annulate lamellar was originated from a radial body-annulate lammellae complex. In the maturation phase, The Golgi complex with dilated cistrern appeared in the cytoplasm, and also, annulate lamellar was observed in the cytoplasm. The connection of the annulate lamellar with the cistern of radial body suggests that an annulate lamellar seems to be closely related to radial body. The smooth endoplasmic reticulum was scattered in the cytoplasm in the early Golgi phase, but annulate lamellar-radial body complex which might be a residual and disappearing form of the smooth endoplasmic reticulum appeared in the acrosome phase. The Golgi complex steadily remained in the late maturation phase when the endoplasmic reticulum began to disappear from the cytoplasm: the Golgi complex was still occurred after acrosome formation. The observations obtained in the present study, which was characterized by the presence of the Golgi complex in the late maturation phase, suggests that the Golgi complex may play an important role also even after the acrosome formation.

• Journal of the Society of Disaster Information
• /
• v.11 no.3
• /
• pp.318-328
• /
• 2015

Effective urban flood reduction and restoration of natural water cycle at present include the application of permeable pavements. The application of permeable pavement addresses urban water cycle and disaster related events which gained attention internationally. However, few researches have been conducted to investigate unsaturated behavior and evaluate the water characteristics curves of these type of pavement materials most especially in the unsaturated state. In this study, first the saturated permeability and the soil-water characteristics curve of a pervious concrete are evaluated based on laboratory tests, and, based on experimental results, the infiltration of permeable pavement system is numerically modelled. In the soil-water characteristics curve of a pervious concrete, the volumetric water content drops very steeply after the air entry value with increasing matric suction. From the finite element analyses, the performance of the permeable pavement when compared to impermeable pavement, confirmed that the whole system effectively delayed and reduced runoff.

• Journal of Korea Soil Environment Society
• /
• v.3 no.1
• /
• pp.11-20
• /
• 1998

Inorganic nitrogens resulting from fertilizers are possible contaminants of bank-filtered ground water, which is an alternative source of safe drinking water. We conducted a laboratory study to determine the fate of inorganic nitrogens in the near field of bank filtration sites and we consequently illustrated the effects of these possible contaminants on the water quailty of bank filtration. Soil properties were found to be well equivalent to those of other cultivated field soils in Korea. Surface soil pH was about 4.3 which is slightly lower than average level. Overall, diverse concentrations of $NO_3$-N and $NH_3$-N were measured, and $NO_2$-N was nearly undetected. $NH_3$-N level in the field decreased, while $NO_3$-N increased along with increasing depth of unsaturated zone. Numbers of viable and nitrifying bacteria ranged from 6.73$\times$$10^{6}$to 10.7$\times$$10^{6}$ and 0.44$\times$$10^{4}$ to 5.21$\times$$10^{4}$ respectively, and both of them were highly correlated ($R^{2}$=0.992). Nitrifying potential assayed by batch test showed relatively lower than other reported results. The oxygen uptake potential of surface and subsurface soil was measured in the presence of ${(NH_4)_2}$$SO_4$. The results demonstrated that surface soil required shorter lag period and uptaked more oxygen than subsurface's.

• Polymer(Korea)
• /
• v.32 no.6
• /
• pp.529-536
• /
• 2008

We manufactured poly (L-lactide-co-glycolide) (PLGA) scaffolds impregnated demineralized bone particle (DBP) and hyaluronic acid (HA) by ice-particle leaching method and tested their ability of sustained release of brain derived neurotrophic factor (BDNF). BDNF (50 and 200 ng) mixed with PLGA, DBP/PLGA, HA/PLGA and DBP/HA/PLGA scaffold. The release profiles of BDNF from BDNF loaded scaffolds were assayed using ELISA. Morphological changes of scaffolds by BDNF release were also observed by SEM. BDNF stably and sustainedly released from DBP/HNPLGA than from PLGA and DBP/PLGA scaffolds. DBP/HA/PLGA scaffolds showed the great structural changes, which demonstrated BDNF release amount from DBP/HA/PLGA scaffolds were highest in all groups. We suggest that BDNF loaded DBP/HNPLGA scaffold would be very useful for nerve regeneration.

• Korea journal of population studies
• /
• v.31 no.3
• /
• pp.85-106
• /
• 2008

This study explores Korean youths' gender equality consciousness in an attempt to search for a way to increase youth's gender equality consciousness. First, this study carries out a survey of youths' gender equality consciousness based on questionnaires collected from a nationwide sample. Second, this study attempts to identify key points needed to evaluate youths' gender equality consciousness in terms of youths' general values. The data used for this survey is from the survey on youths' values conducted by Korean Institute for Health and Social Affairs in 2006 with a sample of 11,240 students from 132 schools nationwide. As a result, youths in 2006 had higher gender equality consciousness than that of previous years(2002). Especially, the support for the fair share of domestic work in the house by youths was significantly increased than the past. However, the survey of youths' values showed clear gender gaps in general attitudes of youths including gender equality consciousness. Female students not only had higher gender equality consciousness than male students but also had higher levels of 'universal value' which would allow one to become sensitive to discrimination and 'self development and achievement value'. In contrast, male students scored high on 'power-oriented value' related to discriminatory attitudes. Therefore, the study recommends focusing on alleviating the gender gaps through school education and other various media education.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2012.05a
• /
• pp.965-969
• /
• 2012

도시의 개발을 통한 발전방향은 지역별 기술력을 바탕으로 시대의 흐름과 문화, 경제, 도시정책 등에 따라 다양하다. 특히, 워터프론트는 도시와 가장 근접한 친수공간으로 단어자체에 도시'라는 개념이 포함되어 있다. 즉 도시가 큰 강이나 바다, 호수 등과 접하고 있는 공간을 말한다. 우리나라는 도시계획차원에서 도시 수변공간(urban waterfront)으로 설정하고, 레크레이션, 공원, 경관형성, 환경오염 저감, 정서함양, 생산 등의 다양한 기능을 갖고 있는 매우 공공성이 높은 도시지역의 주요 공간지역으로 의미를 부여하고 있다. 그러나 워터프론트를 개발계획을 수립하는 과정에서 교통계획, 홍수 등의 재해시설, 환경 등에 대한 평가가 제대로 이루어지지 않고 있으며(한국일보, 2011), 개발 계획 추진은 주민 공감대 형성, 사업타당성 검토 없는 '밀어부치기식' 개발 지상주의로 전락하고 있다. 따라서 본 연구는 국내 워터프론트 개발사업 계획을 추진하고 있는 지역으로 인천 송도지역과 부산의 수산시장으로 유명한 자갈치시장 일대의 개발계획, 마산 도시재생지구의 항만 재개발계획 사례를 분석하여 개발계획의 문제점과 언론상에 비춰지는 개발의 현 실태, 지역개발의 효과 등에 대한 시사점을 도출하였다. 사례지역을 비롯한 대부분의 기존 워터프론트 개발은 경제성을 위해 규모가 큰 상업시설 위주로 개발이 이루어지고 있으며, 주거시설이나 문화시설을 비롯한 다양한 시설의 구성이 부족한 특수성을 갖추어 가고 있다. 또한, 기존의 유휴공간을 재개발하면서 도시와의 관계를 제대로 설정하지 못하여 도시와 분리된 폐쇄공간으로 개발이 이루어지고 있으며, 도시구조에 통합되지 못하고 있는 실정이다. 무엇보다 워터프론트 개발사업에 관계된 여러 집단들, 즉 중앙정부, 지방자치단체, 개발주체, 시민 등 이들 사이에 합의 도출의 어려움이 많아 좋은 계획안이 무산되거나 사업이 지체 혹은 중단되는 사례가 많았다. 워터프론트 개발에 대한 지역민사회의 충분한 공감대가 결코 형성되지 않았음에도 오히려 요식적 여론수렴 절차를 강조하고 있으며, 친환경적 도시개발이라는 사업의 목적과 맞지 않는 계획이 많았다. 특히, 관련 사업 중 항만재개발사업에는 막대한 초기 투자비가 소요되어 재개발사업을 위한 자금의 확보가 어려운 경우가 많이 있었으며, 도시의 장기발전계획과 통합된 장기적인 개발전략이 필요한데 이를 소홀히 하는 경우가 있었다. 본 연구를 통해 기존 워터프론트 개발계획의 문제점과 향후 정비계획이 추구해야 하는 친수구역의 관리방법, 주민참여 방안의 대안제시가 이루어 질 수 있었으며, 이를 바탕으로 국내 친수공간 정비계획을 재 고찰 할 수 있는 기회가 되었으면 한다.