• 한국전자통신학회논문지
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• 제11권8호
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• pp.773-782
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• 2016

최근 에너지 산업은 저성장 기조 지속, 에너지 고갈, 기후 온난화, 에너지 기업 파산 등의 위기에 직면하여 있으며 이를 돌파하기 위하여 다양한 방법들이 시도되고 있다. 본 논문에서는 신기후체제 출범에 따른 에너지 신산업의 등장배경과 국가별 기술동향을 분석하고 이에 대한 대응방안으로 에너지 신산업의 비즈니스 모델을 제안한다. 제안된 전력분야 비즈니스 모델로는 유무선 AMI 인프라 기반 EoT 서비스, 주파수 조정용 ESS, VnG 활용 E-프로슈머, 그리고 스마트 시티를 소개한다.

• 한국연초학회지
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• 제20권1호
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• pp.50-56
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• 1998

The complementary DNA (cDNA) of potato virus Y- vein necrosis strain (PVY-VN) replicase gene (Nlb) was transformed into tobacco (Nicotiana tabacum cv. Burley 21) plants. Out of 25 putative transformants regenerated, 3 were resistant to PVY-VN, one highly resistant plant with no symptom until seed harvest time and the other two with mild chlorotic spot symptoms at late stages after infection. No symptom was observed in the highly resistant plant, while mild vein necrotic symptoms were developed on suckers of the moderately resistant plants after seed harvest time, In the first generation (T1) via self fertilization, resistance to susceptibility frequency in transgenic plants from the highly resistant transformant was about 3 : 1, while it was lowered much (about 1:2 and 1:19) in T1 of the moderately resistant transformants. In the second generation (T2) of the highly resistant plant, resistance frequencies were similar to T1, but resistance levels varied greatly and appeared to be decreased. Key words : potato virus Y, viral replicate gene, transgenic tobacco plants, resistance.

• 한국연초학회지
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• 제7권1호
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• pp.7-13
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• 1985

Effect of the two PVY strains(PVY-VB and PVY-VN) on yield and chemical constituents of tobacco plants was determined in roar. NC2326 and Burley 21. The virus was inoculated 6 and 8 weeks after transplanting, respectively. The strains and time of inoculation were most critical factors for yield reduction. The greatest reduction was caused by the necrotic strain (PVY-VN) inoculated 6 weeks after transplanting, accounting for the loss of 40% in var. NC2326 and of 45% in var.. Burley21. When inoculated 8 weeks after transplanting with the necrotic strain, only 17% reduction was recorded in roar. Burley21, but no reduction occurred in roar. NC2326. Generally less reduction was caused by the PVY-VB strain, ranging 12-16% depending on the time of inoculation and/or variety. Compared to healthy tobacco, PVY infected tobacco contained higher concentrations of total nitrogen, protein nitrogen, nitrate nitrogen, and lower total sugar in cured leaf of roar. NC2326. Total alkaloid, P, Mg, Ca, and K levels were not altered. In var. Burley21, protein nitrogen and nitrate nitrogen increased, but other chemical components were not changed. Necrotic strain-infected tobacco with a severe symptom had higher nitrogen than did mild strain-infected tobacco.

• 한국동물위생학회지
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• 제23권3호
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• pp.271-279
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• 2000

This study was carried out to provide the fundamental information for development of proper vaccination program against infectious bursal disease(IBD) to the local chicken farms. The antigen detection was peformed from 8 samples of bursa of Fabricius with agar gel precipitation(AGP) and indirect immunofluorescent assay(IFA), And also, the antibodies in serum samples were detected by the various serological methods such as commercial ELISA assay, AGP and virus neutralization(VN) test. 1. The antigen detection rates were 25% for AGP which is 2 out of 8 farms and 10 out of 40 bursas, and 25% which Is 2 out of 8 farms and 20% 8 out of 40 bursas for IFA, respectively. 2. The mean titer of maternal antibody (>3,000) existed until 10 days of the age with ELISA-GMT. 3. The antibody positive rates which are over 80% showed until 5 days of the age with ELISA and at 10 days of the age with AGP except one, but none of them showed from 1 day of the age. This report came to conclusions that both the protective maternal antibody titers and the antigen positive rates were significant until at the 10 days of the age.

• Journal of Microbiology and Biotechnology
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• 제24권3호
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• pp.379-385
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• 2014

The purpose of this study was to compare the ability of an engineered Escherichia coli to degrade chlorpyrifos (Cp) using an organophosphorus hydrolase enzyme, encoded in both Flavobacterium sp. ATCC 27551 or Pseudomonas diminuta, by employing the Lpp-OmpA chimera and the N-terminal domain of the ice nucleation protein as anchoring motifs. Tracing of the expression location of the recombinant protein using SDS-PAGE showed the presentation of OPH by both anchors on the outer membrane. This is the first report on the presentation of OPH on the cell surface by Lpp-OmpA under the control of the T7 promoter. The results showed cell growth in the presence of Cp as the sole source of energy, without growth inhibition, and with higher whole-cell activity for both cells harboring plasmids pENVO and pELMO, at approximately 10,342.85 and 10,857.14 U/mg, respectively. Noticeably, the protein displayed by pELMO was lower than the protein displayed by pENVO. It can be concluded that Lpp-OmpA can display less protein, but more functional OPH protein. These results highlight the high potential, of both engineered bacteria, for use in the bioremediation of pesticide-contaminated sources in the environment.

• 정보와 통신
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• 제25권7호
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• pp.16-23
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• 2008

텔레매틱스에서 위치 정보 서비스를 효과적으로 제공하기 위해 이동 객체와 더불어 시설물과 같은 정적 객체에 대한 위치 정보를 효과적으로 관리하는 데이터베이스 기술들이 요구된다 본 논문에서는 도로 네트워크 데이터베이스를 위한 인덱싱 및 질의 처리 기술 현황에 대하여 고찰한다. 텔레매틱스에서는 영역 질의, k-최근접 이웃 질의, 연속 k-최근접 이웃 질의, 공간 조인 질의 등이 발생하며, 이 중 k-최근접 이웃 질의가 빈발하게 발생한다. k-최근접 이웃 질의를 처리하기 위한 효과적인 방안으로 IER, INE, $VN^3$, 근사 인덱싱 기법 등이 있다. 본 논문에서는 각 기법의 개념, 알고리즘, 장단점에 대하여 고찰한다.

• 한국연초학회지
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• 제5권1호
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• pp.19-23
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• 1983

Potato virus Y (PVY) distribution, areas where the virus occurred, and incidence, Percentage of plants infected, on burley tobacco in Korea was surveyed in 1982. Most of the fields Investigated were infected with PVY. The virus incidence was 12.5%. District)union and incidence generally were sporadic, but Onyang, Hongseung and Iksan area virus incidence was higher than that of other areas. For strain identification, approximately 95% was nonnecrotic (PVY-VB) and 5olo necrotic strain (PVY-VN) .

• 충청수학회지
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• 제24권2호
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• pp.337-344
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• 2011

We provide another unified proof that $A_{\gamma}(G)$ and $A_{\Delta}(G)$ are Banach algebras for a compact group G, where $A_{\gamma}(G)$ and $A_{\Delta}(G)$ are images of the convolution and the twisted convolution, respectively, on $A(G{\times}G)$. Our new approach heavily depends on analysis of co-multiplication on VN(G), the group von-Neumann algebra of G.

• 한국동물위생학회지
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• 제22권4호
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• pp.363-370
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• 1999

돼지 호흡기 생식기증 바이러스(porcine reproductive and respiratory syndrome virus: PRRSV) 감염이 의심되는 농장으로부터 수집된 혈청가검물 646개로부터 MARC-145 cell을 이용하여 PRRSV 분리를 시도한 바 MARC-145 세포단층상에 세포변성효과(cytopathic effects : CPE)를 나타내는 바이러스 36주를 분리하였다. 분리된 36주가 PRRSV인지 여부를 확인하기 위하여 PRRSV를 실험적으로 접종한 혈청을 이용하여 간접형광항체시험과 혈청중화시험을 실시한 결과 36주 모두가 PRRSV로 동정되었다. 혈청학적인 동정법과 더불어 reverse-transcription polymerase chain reaction을 이용하여 PRRSV open reading frame 5(ORF5)의 유전자를 증폭한 결과 선발된 6주 모두에서 80bp의 flanking sequencing를 포함하여 약 680bp의 ORF5의 유전자를 증폭할 수 있었다.

• 대한수학회지
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• 제36권6호
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• pp.1061-1073
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• 1999

Let X be a real normed linear space. Let T : D(T) ⊂ X \longrightarrow X be a uniformly continuous and ∮-strongly quasi-accretive mapping. Let {${\alpha}$n}{{{{ { }`_{n=0 } ^{$\infty$ } }}}} , {${\beta}$n}{{{{ { }`_{n=0 } ^{$\infty$ } }}}} be two real sequences in [0, 1] satisfying the following conditions: (ⅰ) ${\alpha}$n \longrightarrow0, ${\beta}$n \longrightarrow0, as n \longrightarrow$\infty$ (ⅱ) {{{{ SUM from { { n}=0} to inf }}}} ${\alpha}$=$\infty$. Set Sx=x-Tx for all x $\in$D(T). Assume that {u}{{{{ { }`_{n=0 } ^{$\infty$ } }}}} and {v}{{{{ { }`_{n=0 } ^{$\infty$ } }}}} are two sequences in D(T) satisfying {{{{ SUM from { { n}=0} to inf }}}}∥un∥<$\infty$ and vn\longrightarrow0 as n\longrightarrow$\infty$. Suppose that, for any given x0$\in$X, the Ishikawa type iteration sequence {xn}{{{{ { }`_{n=0 } ^{$\infty$ } }}}} with errors defined by (IS)1 xn+1=(1-${\alpha}$n)xn+${\alpha}$nSyn+un, yn=(1-${\beta}$n)x+${\beta}$nSxn+vn for all n=0, 1, 2 … is well-defined. we prove that {xn}{{{{ { }`_{n=0 } ^{$\infty$ } }}}} converges strongly to the unique zero of T if and only if {Syn}{{{{ { }`_{n=0 } ^{$\infty$ } }}}} is bounded. Several related results deal with iterative approximations of fixed points of ∮-hemicontractions by the ishikawa iteration with errors in a normed linear space. Certain conditions on the iterative parameters {${\alpha}$n}{{{{ { }`_{n=0 } ^{$\infty$ } }}}} , {${\beta}$n}{{{{ { }`_{n=0 } ^{$\infty$ } }}}} and t are also given which guarantee the strong convergence of the iteration processes.