• 에너지공학
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• 제5권1호
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• pp.1-7
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• 1996

Coal consumption in Asia is projected to increase by about 1.3 billion tons over the 1993-2010 period. The expansion in coal consumption for electricity generation is the dominant factor in the large increase in coal consumption. Without effective control measures, the projected increase in coal consumption will have a serious impact on environmental effects of increased coal use in Asia. Thus, the introduction of appropriate CCTs is considered essential to achieving the twin goals of expanded use of coal decreased environmental impacts.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2013년도 제44회 동계 정기학술대회 초록집
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• pp.113-114
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• 2013

Time-of-flight secondary ion mass spectrometry (TOF-SIMS) imaging is a powerful technique for producing chemical images of small biomolecules (ex. metabolites, lipids, peptides) "as received" because of its high molecular specificity, high surface sensitivity, and submicron spatial resolution. In addition, matrix-assisted laser desorption and ionization time-of-flight (MALDI-TOF) imaging is an essential technique for producing chemical images of large biomolecules (ex. genes and proteins). For this talk, we will show that label-free mass imaging technique can be a platform technology for biomedical studies such as early detection/diagnostics, accurate histologic diagnosis, prediction of clinical outcome, stem cell therapy, biosensors, nanomedicine and drug screening [1-7].

• 한국농공학회:학술대회논문집
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• 한국농공학회 1999년도 Proceedings of the 1999 Annual Conference The Korean Society of Agricutural Engineers
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• pp.618-624
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• 1999

For many soft ground embankment projects , instrumentation programs for stability and settlement management is being essential . This usually leads to generate large volume of data, which can be used for further research. Database technique is most effective method for data management . Data produced by soft ground embankment instrumentation can not be used by itself but must be reproduced using geotechnical analysis technique. In this study, a intelligent database system for softground called IDSIM was developed to examine applicability intellgent database. . The IDSIM analysis instrumentation data automatically and present results by Web/DB interface successfully.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 추계학술대회 논문집
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• pp.902-906
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• 2005

The ability of freight users to identify and to utilize options to move is limited. Saving in time and in fare to freight users could be significant if whole transport sequences could be planned and implemented with high level of service. In oder to improve the attractiveness of rail freight, it is essential that the industrial railway tracks between railway network and large scale logistics facilities are completely equipped. This article present the direction of the master plan of Korean industrial railway tracks.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 추계학술대회 논문집
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• pp.1143-1148
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• 2005

Recently, the application of construction IT (Information Technology) is recognized as an essential tool for the effective construction management and construction CALS. And the large construction projects are already using PMIS tool, and the application of construction IT tool will be accelerated by rapid popularization of computerized construction management system. This study defines a concept of construction IT and suggests an improved method to apply construction IT tool for construction supervision system.

• 대한산업공학회지
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• 제25권2호
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• pp.217-225
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• 1999

Preprocessing is the essential technique in the implementation of the simplex method for large scale linear programming problems. In this research, we explained the effect of preprocessing in the simplex method, classified the techniques into four categories, and compared our results with those of HOPDM, CPLEX and Soplex by computational experiments. We also noted some implementing issues of preprocessing for the simplex method and the recovery of the optimal basis of the original problem from that of the preprocessed problem.

• International Journal of Computer Science & Network Security
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• 제21권9호
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• pp.317-322
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• 2021

The modern technological era has brought about the Semantic Web. Ontologies are essential to achieve the vision of the Semantic Web. Ontologies enable machines to understand data. The Arabic Language currently does not have a significant presence on the Web. To achieve a comparable level of Arabic access to other important languages, further work is needed to build Arabic ontologies. A goal is to design and create a robust Arabic ontology that represents the concepts from a large and significant subset of Arabic. We use a source of Hadiths (prophet saying and deeds) from Riyadh As-Saliheen. Preliminary results are very promising.

• 식물병연구
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• 제15권3호
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• pp.236-241
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• 2009

본 연구는 정유를 이용하여 환경친화적으로 Botrytis cinerea에 의한 수삼 저장병 방제방법을 개발하기 위하여 수행되었다. 정유의 일종인 methyl eugenol은 200 ppm 농도의 배지상에서 80% 이상의 높은 균사 생육억제 효과를 나타냈다. 상온에서 수삼에 직접 처리 시 무처리구에서 80% 이상의 발병률을 보일 때 methyl eugenol이나 thymol 모두 분무와 침지처리구에서 10~20% 이하로 낮게 발병하여 높은 병 방제효과를 보였다. 저온($4^{\circ}C$)에서의 처리결과도 실온과 비슷하게 포장크기와 상관없이 무처리구에 비해 발병률이 매우 낮게 나타나 역시 실용적인 효과가 뛰어났다. 2 kg 이상을 분석한 대포장 실험에서도 무처리구는 발병지수가 1.65를 보인 반면 methyl eugenol은 0.60으로 개체별 발병면적이 상대적으로 매우 좁게 나타났다. 그러나 두 물질(methyl eugenol+thymol)의 혼합처리에 의한 상승효과는 확인할 수 없었다. Methyl eugenol은 잔류독성이 없고 수삼 저장병 발생 억제효과가 뚜렷해 수삼 저장 시 처리할 수 있는 환경친화적 제제로서 활용 가능하며 특히 신선한 상태로 섭취가 가능해야하는 수삼의 특성으로 볼 때 수삼 저장병 방제제로서의 활용가치는 더욱 클 것으로 판단된다.

• 한국식품영양학회지
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• 제23권2호
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• pp.154-161
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• 2010

국화 정유의 식중독균에 대한 항균력을 검증하기 위해 국화 정유와 그 주성분인 camphor, chrysanthemyl alcohol, $\alpha$-pinene, $\gamma$-terpinene, ${\alpha}+{\beta}$-thujone를 10종 균주에 대하여 agar-well diffusion 분석법으로 생육 여부를 분서하였다. 실험 결과 국화 정유와 그 지표물질은 Gram 양성균과 음성균 모두에 대해서 탁월한 항균 효과가 나타났다. Agar-well diffusion 분석법 결과 국화 정유와 그 지표물질은 Gram 음성균보다 Gram 양성균에 대해서 강력한 활성을 나타내었다. 국화 정유의 minimum inhibitory concentration은 모든 균주에 대하여 5 ${\mu}g/m{\ell}$에서 균의 생장을 저해하는 효과가 나타났고, minimum bacteriocidal concentration은 S. choleraesuis와 L. monocytogenes에 대해서는 시험농도 내에서 사멸효과가 관찰되지 않았으나, 다른 균주에 대해서는 5~20 ${\mu}g/m{\ell}$에서 살균력이 나타났다. 또한 액체 배양중의 항균효과를 조사한 결과, 국화 정유와 그 지표물질은 24시간 동안 꾸준히 항균력이 지속되었다. 따라서 camphor, chrysanthemyl alcohol, $\alpha$-pinene, $\gamma$-terpinene, ${\alpha}+{\beta}$-thujone를 조성분으로 함유한 국화 정유성분은 10종의 식중독균에 대한 항균활성이 입증되어, 천연 항균제재로서 식품보존료로의 이용이 가능하리라 생각된다.

• Journal of Power Electronics
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• 제12권1호
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• pp.128-135
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• 2012

In this paper, different switching tables proposed for the Direct Torque Controlled (DTC) of a six-phase induction machine are simulated and implemented. A six-phase induction motor has 64 space voltage vectors which result in increased complexity in the selecting of inverters switching. The unsuitable selection of a switching table leads to large harmonics especially at low speed and it also reduces drive efficiency. A six-phase induction machine has large zero sequence harmonic currents of the order $6{\kappa}{\pm}1$. These harmonic currents are varied in various techniques. Decreasing this loss is essential in a six-phase induction machine. The main purpose of this paper is to improve the ST-DTC of six-phase induction machines to reduce the voltage and current harmonics and the torque pulsation. Selecting a suitable method for minimizing these harmonics is very important.