• 미생물학회지
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• 제53권3호
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• pp.216-218
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• 2017

생물학적방제 효과가 뛰어난 Bacillus thuringiensis C25 균주의 유전체 분석을 수행하였다. 본 균주는 5,308,062 bp, G+C 비율 35.32%의 염색체와 308,946 bp, 32.23% G+C 함량이 포함된 plasmid를 지닌 것으로 확인되었다. 염색체와 plasmid DNA에 예측된 유전자의 총 수는 5,683개의 단백질 코딩유전자와 107개 tRNA 그리고 42개의 rRNA였다.

• 대한기계학회논문집A
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• 제27권6호
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• pp.946-953
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• 2003

A FEM-based analytical approach was used to evaluate the multiaxial high cycle fatigue damage of an automotive sub-frame. Elastic Multi Body Simulation (MBS) has been applied in order to determine the multiaxial load histories. The stresses due to these loads have been given by FE computation. These results have been used as the input for the multiaxial fatigue analysis. For the assessment of multiaxial high cycle fatigue damage, the signed von Mises, the signed Tresca, the absolute maximum principal stress and critical plane methods have been employed. In addition, the biaxiality ratio, a$\sub$e/, the absolute maximum principal stress, $\sigma$$\sub$p/ and the angle, $\phi$$\sub$P/, between $\sigma$$\sub$1/ and the local x-axis, have been calculated to evaluate the stress state at each node.

• 한국식품영양학회지
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• 제29권6호
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• pp.946-951
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• 2016

In this study, Ilex serrata Thunb was extracted with 70% methanol and concentrated under reduced pressure to measure its total polyphenol contents; furthermore, we examined the effect of electron donating ability of the various extracts. The extract was fractionated using different solvents such as methylene chloride, ethyl acetate, and methanol to investigate total polyphenol contents and electron donating abilities. The total polyphenol contents were $1,058.59{\pm}85.85{\mu}g\;GAE/mL$ in 70% methanol, $297.29{\pm}29.43{\mu}g\;GAE/mL$ in methylene chloride, $313.28{\pm}9.22{\mu}g\;GAE/mL$ in ethyl acetate, and $837.82{\pm}31.16{\mu}g\;GAE/mL$ in methanol. The total polyphenol contents showed significant differences (p<0.05) between the solvents. The electron donating abilities were $72.93{\pm}0.29%$ for 70% methanol extract, $14.02{\pm}2.01%$ for methylene chloride, $24.05{\pm}1.75%$ for ethyl acetate, and $84.08{\pm}1.95%$ for methanol. The electron donating abilities were significantly different (p<0.05) between the solvents. The two portions of Ilex serrata Thunb extracts obtained from methanol showed significantly relevant results in the total polyphenol contents and electron donating ability, which was higher than the original extract.

• 한국의류학회지
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• 제35권8호
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• pp.946-958
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• 2011

This study develops Korean Style Loungewear as a cultural fashion product. Through the use of surveys, Korean sentiments about Korean traditional clothing and Korean style fashion have been examined. The survey was conducted for 5,000 people in Korea; 3,500 responses of meaningful data were statistically analyzed. The data was processed by a SAS system; frequency and percentage were performed. It was found that Korean people have a high preference for Korean traditional clothing; however, they are not satisfied with its comfort, maintenance, or price. They answered that they would wear Korean style fashion if the design, comfort, and price were improved. They responded positively on the development of Korean Style Loungewear and its effectiveness as a cultural product. Based on the survey and basic geometric structures of Korean traditional costumes, silhouette designs of Loungewear have been developed. The designs are divided into one-piece styles and two-piece styles. The characteristic design details are git (Korean neckline) and goreum (Korean tie ribbon). The results have been shown on the "Han Style Fashion Show" by Jeonju City and exhibited in the "Seoul Living Design Fair" and the "International Art & Craft Trend Fair" in COEX, Seoul.

• 한국생산제조학회지
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• 제21권6호
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• pp.946-953
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• 2012

When water shortage has been getting worse recently, toilet water-saving is one of the most effective way to solve the water shortage. Therefore, in this study, toilet flushing performance was investigated with VOF(Volume Of Fluid) model to obtain the basic design data for the development of high-efficiency toilets. The result showed that the shorter trapway, the longer the flushing duration time. However, the shorter trapway is found to have disadvantage in exhausting dirt due to relatively weak siphon and higher curvature. Since the remaining water in a trapway appears to help siphon, it is also an important factor in developing high-efficiency toilets. Although higher water level in the water tank shows better performance in flushing, lower water level is preferred to save water. Too low water level may cause dirt to clog the trapway due to relatively weak siphon.

• 한국축산식품학회지
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• 제30권6호
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• pp.946-950
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• 2010

This study evaluated the antimicrobial effects of meat processing-related organic acids on Burkholderia thailandensis (Burkholderia pseudomallei surrogate) with different water activities. B. thailandensis KACC12027 (4 log CFU/mL) was inoculated in microwell plates containing tryptic soy broth pH-adjusted to 4, 5, 6, and 7 with ascorbic acid, citric acid, and lactic acid and with water activities adjusted to 0.94, 0.96, 0.98, and 1.0 with NaCl, followed by incubation at $35^{\circ}C$ for 30 h. The optical density (OD) of the samples was measured at 0, 3, 6, 12, 24, and 30 h at 595 nm to estimate the growth of B. thailandensis. Growth of B. thailandensis was observed only at water activity of 1.0. In general, more bacterial growth (p<0.05) was observed at pH 6 than at pH 7, and the antimicrobial effects of the organic acids on B. thailandensis were in the following order: Ascorbic acid > lactic acid > citric acid after incubation at $35^{\circ}C$ for 30 h. These results indicate that organic acids in meat processing-related formulations should be useful in decreasing the risk related to an emerging high risk agent (B. pseudomallei).

• 인터넷정보학회논문지
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• 제11권4호
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• pp.95-106
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• 2010

최근 복잡한 프로그래밍 환경에서 다수의 프로세스들은 서로 협력하기 위하여 서로 통신하고 자원과 정보를 공유한다. 커널에서는 이것이 가능한 방법으로 프로세스간 통신이라는 IPC(Inter-Process Communication)를 제공한다. 리눅스에서 사용되는 공유 메모리는 동일한 메모리 영역에 여러개의 프로세스가 접근할 수 있도록 해 주는 기술이다. 본 논문에서는 서로 다른 코어에 서로 다른 운영체제를 갖는 듀얼코어 임베디드 리눅스 시스템에서 공유 메모리 성능 개선 방안을 제시하고, MP2530F(ARM926F+ARM946E)의 임베디드 리눅스 시스템을 구축하여 성능을 측정한다. 공유 메모리를 이용한 프로세스의 동작이 별개의 CPU에서 동작되도록 함으로써 성능 향상을 꾀한다.

• 한국공간구조학회논문집
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• 제12권2호
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• pp.73-80
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• 2012

2002년부터 2010년까지 세계적으로 발생한 테러 현황을 조사 및 분석한 결과 전체 1만 9천 946건의 테러유형 중 51.8%인 1만 333건이 폭파에 의한 테러로 나타났으며, 사용무기에 있어서도 폭파와 관련된 폭발물이 약 52.2%인 1만 431건으로 높게 나타나고 있다. 이에 본 논문에서는 FEMA-rapid visual screening을 통해 국내의 건물을 높이별로 테러위험도를 분석하였다. 그 결과 건물의 높이가 높아질수록 테러에 대한 위험도가 높게 나타나고 있어 전체위험도는 건물의 높이와 비례하여 증가하는 것을 확인하였다. 높이 100m 이상 건물의 경우 Threat 항목이 전체위험도에 가장 크게 영향을 미치며, 폭발과 관련된 시나리오에 따른 위험도 분석결과 내부 폭발 항목에서 높게 나타나고 있다.

• Journal of Power Electronics
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• 제16권3호
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• pp.946-959
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• 2016

A novel Virtual Space Vector (VSV) modulation strategy for complete control of potential neutral point (NP) issues is proposed in this paper. The neutral point potential balancing problems of multi-level converters, which include elimination of low frequency oscillations and self-balancing for NP dc unbalance, are investigated first. Then a set of improved virtual space vectors with dynamic adjustment factors are introduced and a multi-objective optimization algorithm which aims to optimize these adjustment factors is presented in this paper. The improved virtual space vectors and the multi-objective optimization algorithm constitute the novel Virtual Space Vector modulation. The proposed novel Virtual Space Vector modulation can simultaneously recover NP dc unbalance and eliminate low frequency oscillations of the neutral point. Experiment results show that the proposed strategy has excellent performance, and that both of the neutral point potential issues can be solved.

• Journal of Power Electronics
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• 제14권5호
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• pp.946-956
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• 2014

Cascaded H-Bridge (CHB) converters can be directly connected to medium-voltage grids without using transformers and they possess the advantages of large capacity and low harmonics. They are significant tools for providing grid connections in large-capacity renewable energy systems. However, the reliability of a grid-connected CHB converter can be seriously influenced by the number of power switching devices that exist in the structure. This paper proposes a fault-tolerant control strategy based on double zero-sequence voltage injection and DC voltage optimization to improve the reliability of star-connected CHB converters after one or more power units have been bypassed. By injecting double zero-sequence voltages into each phase cluster, the DC voltages of the healthy units can be rapidly balanced after the faulty units are bypassed. In addition, optimizing the DC voltage increases the number of faulty units that can be tolerated and improves the reliability of the converter. Simulations and experimental results are shown for a seven-level three-phase CHB converter to validate the efficiency and feasibility of this strategy.