• Asian-Australasian Journal of Animal Sciences
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• 제16권6호
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• pp.823-829
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• 2003

Four different types of silage from new cultivars of Napier grass (Pennisetum purpureum), cv. NG 1 and NG 2, were fed to eight wethers in order to evaluate their preference and intake by sheep. The silages were prepared from direct-cut NG 1 herbage; pre-wilted NG 1 herbage; NG 1 herbage with maize meal (5% inclusion) and NG 2 herbage with maize meal (5% inclusion). All silages were palatable to sheep. Maize-treated silage had high quality fermentation, characterized by high Fleig scores and low pH, volatile fatty acids (VFA) and ammoniacal nitrogen contents. The pH, Fleig score, in vitro digestible organic matter (IVDOMD) and ammoniacal-N contents for maize-treated cv. NG 1 silage were 3.7, 78, $540g\;kg^{-1}$ dry matter (DM ) and $0.18g\;kg^{-1}$ DM whereas, in maize-treated cv. NG 2 they were 3.6, 59, $^458g\;kg{-1}$ DM and $0.18g\;kg^-1$ DM, respectively. The superior quality of maize-treated silages made them more preferable to sheep. Among the maize-fortified silages, palatability and intake were significantly (p<0.001) greater with cv. NG 1. Although direct-cut silage had better fermentation quality compared to wilted silage, wilted silage was significantly (p<0.001) more preferable to sheep. However, there were no significant differences (p<0.05) in the levels of preference and intake of wilted silage compared to maize-treated cv. NG 2 silage, even though the latter tended to be more palatable. There were indications that high pH (4.6 vs 3.5) and IVDOMD content (476 vs $457g\;kg^{-1}%$ DM) of wilted silage contributed to higher intake, compared to direct-cut silage. It was generally concluded that pre-wilting and treatment of Napier grass with maize meal at ensiling enhances intake and palatability.

• 한국초지조사료학회지
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• 제42권1호
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• pp.26-31
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• 2022

본 연구는 여름 사료작물 재배기간에 빈번하게 발생하는 가뭄, 폭우 등 이상 기후에 대응한 여름철 응급 조사료 자원을 선발하고 잠재적 생산성을 평가하기 위해 2020년 5월부터 2021년 10월까지 충청남도 천안시 소재 국립축산과학원 축산자원개발부 초지 조사료 시험포장에서 재배시험을 수행하였다. 시험 초종은 여름철 응급조사료 자원으로 유망한 사료용 피(Echinochloa species cv. Shirohie and Jeju native), 재래기장(Panicum miliaceum cv. Native), 진주조(Pennisetum glaucum cv. Feed milk 2), 클라인그라스(Panicum coloratum cv. Selection 75), 테프그라스(Eragrostis tef cv. Tiffany)를 수집하여 파종은 2020년에 5월 21일과 6월 23일에 각 각 파종하였으며 2021년에는 5월 21일과 6월 21일에 2회 파종하였다. 사료용 피와 클라인그라스의 출현소요일은 6~10일 정도로 파종 후 가장 늦게 출현되었고 재래기장과 진주조는 5~6일 소요되었으며 테프그라스는 3일로 가장 빨리 출현되었다. 파종부터 수확까지 재배기간은 사료용 피 만생종(84일 이내)을 제외하고 모든 초종이 60일 이내에 출수기에 도달하였다. 파종시기별 건물수량은 5월 파종에서 사료용 피 만생종의 건물수량이 23,872 kg/ha로 가장 높게 나타났으며 클라인그라스가 3,888 kg/ha로 가장 낮게 나타났다. 6월 파종은 사료용 피 만생종의 건물 수량이 17,032 kg/ha로 가장 높게 나타났으며 재래기장, 테프그라스와 클라인그라스가 각각 5,468, 5,442 및 5,197 kg/ha로 가장 낮게 나타났다. 조단백질 함량은 초종별로 다양하게 나타났는데 사료용 피 조생종, 테프그라스, 클라인그라스가 높은 경향을 보였으며 사료용 피 만생종이 5.7~5.9%로 가장 낮게 나타났다. 중성세제불용성섬유소(NDF)와 산성세제불용성섬유소(ADF) 함량은 5월 파종은 초종 간에 큰 차이를 보이지 않았으나 6월 파종은 클라인그라스가 나머지 초종에 비해 낮게 나타났다.

• Advances in pediatric surgery
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• 제14권1호
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• pp.67-74
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• 2008

The usefulness of totally implantable central venous port for long-term intravenous infusion is widely accepted in children. Usually the catheters are placed through the internal or external jugular vein. In case of jugular vein cut-down, two separate incisions are needed for catheter and port respectively. Patients also feel uncomfortable as the catheter run through the neck. However these disadvantages can be overcome by using the cephalic vein (CV). We reviewed our experiences on CV cut-down for totally implantable central venous port in children. From January 2002 to December 2006, 201 patients (M:F=127:74) underwent 218 central venous port insertions. Mean age at operation was 5.9 years (2 months - 19 years). Indications included chemotherapy (N=167), long-term intravenous antibiotics infusion (N=36), and total parenteral nutrition (N=15). CV was selected preferentially. The incision includes the deltopectoral triangle laterally, and both the CV cut-down and port insertion were achieved with a single incision. The number of insertion through external, internal jugular vein, and CV was 77, 66 and 75, respectively. The median age, height and body weight were higher in CV cut-down group. The youngest age for CV cut-down was 8 months, the shortest height was 69 cm and the smallest body weight was 5.9 kg. Of 118 trials of CV cut-down, cut-down was successful in 75 cases (63.6 %). CV was absent in 10 cases(8.4 %) and CV was sacrificed after catheter tip malposition in 10 cases (8.4 %). There was only one complication, in which the catheter was inserted into the minute branch of subclavian artery. The CV cut-down method for totally implantable central venous port was safe and feasible in selected groups of patients in children. In addition, preservation of jugular vein and a more favorable cosmetic effect are other benefits of CV cut-down.

• 소성∙가공
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• 제6권3호
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• pp.203-212
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• 1997

In this research, to obtain the optimal die width of CV die(conventional die), which replaces FM die in free forging of large scale rotor using the flat die, the model material experiments and theoretical analysis using three dimensional FEM are performed. The FM die, which was designed to remove Mannesmann's effect at the central part of the ingot, has very bad workabiltity in real field, therefore on the empirical base they use the CV die of wide width in actual working field. In this study, the excellency of CV die is proved quantitively, and the optimal die width of CV die is determined through the model material experiments and theoretical analysis using FEM in the point of effective strain, stresses, and load.

• Preventive Nutrition and Food Science
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• 제7권2호
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• pp.119-122
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• 2002

Oryza sativa cv. Mihyangbyo is one of several recently developed varieties of rice; characterized by high levels of aromatic components, which may increase its sensory and nutritional properties. In conjunction with our continuing investigation of bioactive components of improved grain varieties, a quinolone alkaloid was isolated from the n-butanol soluble fraction of the aleurone layer of Oryza sativa cv. Mihyangbyo (Gramineae) through activity-guided fractionation and isolation. The compound exhibited moderate antineoplastic activity in a human leukemia cell line (U937) with an $IC_{50}$/ value of 118.1 ug/mL, based on the MTT(3-[4, 5]dimethylthiazol-2-yl]-2, 5-diphenyltetrazolium bromide) cell proliferation assay. The chemical structure of the functional compound was determined, based on physical and spectroscopic characteristics.

• Applied Biological Chemistry
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• 제47권4호
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• pp.430-433
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• 2004

Lilium cv. Casablanca pollen grains stored at $-70^{\circ}C$ were grown in pollen germination medium with Agrobacterium tumefaciens LBA4404 cells harboring pBI121 for 18 hr at $27^{\circ}C$. Following this, cefotaxime (250 mg/L) was treated for 6 hr to eradicate the bacterial cells. Histochemical GUS analysis revealed that the transgenic pollen displayed deep blue color mostly from 12 hr after the co-cultivation. Presence of $200\;{\mu}M$ acetosyringone was determined not to be more effective for GUS transformation than its absence. GUS DNA integration in the transgenic pollen genomic DNA was clearly demonstrated by Southern blot analysis.

• 한국음향학회지
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• 제21권2호
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• pp.160-166
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• 2002

본 논문에서는 CV (Consonant Vowel), VCCV (Vowel Consonant Consonant Vowel), VC (Vowel Consonant) 인식 단위를 이용한 새로운 어휘 독립 음성인식 시스템을 구현하였다. 이 인식 단위는 음절의 안정된 모음 구간에서 분할하여 구성했기 때문에 분할이 용이하다. VCCV단위가 존재하지 않을 경우에는 VC와 CV 반음절 모델을 결합하여 대체모델을 구성하였다. 모음군 군집화 (clustering)와 VCCV 모델이 존재하지 않을 경우 대체모델에 결합규칙을 적용하여 제 1후보에서 90.4% (모델 A)에서 95.6% (모델 C)로 5.2%의 인식 성능향상을 가져왔다. 인식실험결과 제 2후보에서 98.8%의 인식률로 제안된 방법이 효율적임을 확인하였다.

• 한국수소및신에너지학회논문집
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• 제29권6호
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• pp.627-634
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• 2018

Gallium-based liquid metal, e.g., eutectic gallium-indium (EGaIn), is highly attractive as an electrode material for flexible and stretchable devices. On the liquid metal, oxide layer is spontaneously formed, which has a wide band-gap, and therefore is electrically insulating. In this paper, we fabricate a capacitor based on eutectic gallium-indium (EGaIn) liquid metal and investigate its cyclic voltammetry (CV) behavior. The EGaIn capacitor is composed of two EGaIn electrodes and electrolyte. CV curves reveal that the EGaIn capacitor shows the behavior of electric double-layer capacitors (EDLC), where the oxide layers on the EGaIn electrodes serves as the dielectric layer of EDLC. The oxide thicker than the spontaneously-formed native oxide decreases the capacitance of the EGaIn capacitor, due to increased voltage loss across the oxide layer. The EGaIn capacitor without oxide layer exhibits unstable CV curves during the repeated cycles, where self-repair characteristic of the oxide was observed. Finally, the electrolyte concentration is optimized by comparing the CV curves at various electrolyte concentrations.

• 한국전자통신학회논문지
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• 제17권6호
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• pp.1229-1236
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• 2022

본 논문에서는 고속도로에서 주행시 2차 사고를 방지하기 위한 사고인식 스마트 가로등에 대해 연구하였다. 가로등에 아두이노 및 센서를 활용하여 운전자에게 기상 상태를 알리고, 햇빛 및 야간 주행 차량에 따른 LED 밝기 조절과 같은 기능을 삽입하였고, 라즈베리파이 카메라 OpenCV를 활용해 텐서플로우 라이트 프로그램을 이용하여 각종 교통사고, 자연재해 및 야생동물 출현을 Deep Learning을 한 후 그 장면들을 인식하여 고속도로에서 일어날 수 있는 사고들을 감지하여 운전자에게 알려주며 각종 2차 사고를 예방하는 것을 보였다.

• 한국산학기술학회논문지
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• 제18권11호
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• pp.479-485
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• 2017

본 논문은 금강 하구의 직 간접적 사용과 관련되지 않는 비사용가치를 조건부가치측정법(CVM)으로 추정하였다. 조건부가치측정법 설문에서 금강 하구의 비사용가치만을 추정하도록 유도하였고, 지불의사금액을 도출하기 위한 제시금액에 대한 양분선택적 응답 결과를 Turnbull 비모수적 추정법을 적용하여 분석하였다. 모형의 추정 결과로부터 Turnbull 하한 평균 지불의사금액을 구하면, 단일양분선택형 CV 자료에서는 5,822원(95% 신뢰구간 5,295원 ~ 6,349원)이고 이중양분선택형 CV 자료에서는 6,205원(95% 신뢰구간 5,701원 ~ 6,710원)으로 추정되었다. 따라서 본 연구에서는 두 추정치의 평균값인 6,014원(95% 신뢰구간 5,498원 ~ 6,529원)을 금강 하구의 연간 비사용가치 산정에 이용하였다. 이로부터 도출된 금강 하구의 비사용가치는 연간 연간 2,203억 원(95% 신뢰구간 2,014억 원 ~ 2,392억 원)에 이른다. 여기에는 유산가치 683억 원(95% 신뢰구간 625억 원 ~ 742억 원), 존재가치(고유가치) 580억 원(95% 신뢰구간 530억 원 ~ 630억 원) 및 선택가치 577억원(95% 신뢰구간 527억 원 ~ 626억 원) 및 대리소비가치 363억 원(95% 신뢰구간 331억 원 ~ 394억 원)이 포함되는 것으로 평가되었다.