• International Journal of Industrial Entomology and Biomaterials
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• 제10권2호
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• pp.131-136
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• 2005

Beauveria bassiana F-101, which has high toxicity toward Acantholyda parki as well as Thecodiplosis japonensis, was an isolate to develop an alternative control system against the major forest pests. Up to now, in B. bassiana, only one pr1 gene has been isolated and characterized. Therefore, we here reported the identification of a pr1-like gene, which would be a factor of toxicity from B. bassiana F-101. The oligonucleotides for the amplification of the pr1-like gene, were chosen based on the conserved regions of the subtilisin family enzymes, pr1 genes of B. bassiana and Metarhizium anisopliae, and proteinase K of Tritirachium album. The cloned PCR fragment had 1111 bp including 52 bp intron. The deduced Pr1-like peptide showed a low identity with Pr1s of entomopathogenic fungi such as B. bassiana Pr1 (BbPr1) and M. anisopliae Pr1 (MaPr1) as well as the proteinase K of T. album (TaPrK). Instead, the deduced peptide had a substantially high amino acid sequence identity $(>65\%)$ with the serine proteases of Magnaporthe grisea (MgSPM1) and Podospora anserina (PaPspA). These results, therefore, appear to suggest that the putative Pr1-like peptide of B. bassiana F-101 belongs to the subtilisin-like serine protease family and may be a novel gene.

• ALGAE
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• 제33권1호
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• pp.101-108
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• 2018

Saccharina japonica was introduced to both Korea and China from Hokkaido, Japan, and it has become an economically important species in both nations. After a long period of cultivation, several varieties of S. japonica have been developed in Korea and China. In this study, we conducted aquacultural research on the persistence of thalli from two kelp cultivars, one from China (Huangguan No. 1) and one from Korea (Sugwawon No. 301), between December 2015 and November 2016 in Haenam, Korea. The maximum length was $247.8{\pm}13.0$ and $227.5{\pm}42.0cm$, respectively, which were significantly longer in Sugwawon No. 301 than in Huangguan No. 1. The maximum width was $29.9{\pm}5.4$ and $23.2{\pm}1.9cm$, respectively, which were significantly wider in Huangguan No. 1 than in Sugwawon No. 301. The mean biomass obtained from the culture ropes was for Sugwawon No. 301 was $3.5{\pm}0.3kg\;wet\;wt\;m^{-1}$ and for while Huangguan No. 1 was $3.1{\pm}1.0kg\;wet\;wt\;m^{-1}$ of culture rope. After August, the persistence of the thalli of Sugwawon No. 301 was two months longer than that of Huangguan No. 1. We found that the Sugwawon No. 301 performed as well as the Huangguan No. 1 in Korean waters possibly due to increased flexibility as a result of the different cell arrangements of the two cultivars. Overall, the use of the Sugwawon No. 301 cultivar rather than the Huangguan No. 1 cultivar of S. japonica appears the best alternative to help to ensure a stable year round algal feed supply for the Korean abalone industry.

• 한국농공학회논문집
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• 제60권3호
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• pp.113-121
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• 2018

The objectives of the research were 1) to develop the low-cost and high efficient desalination system to treat brackish water having high salt contents for irrigation at greenhouses near coast, and 2) to monitor and assess the effects of the brackish water desalination system on soil environment and growth in squash greenhouse cultivation area. The monitoring site was one of the squash greenhouse cultivation farm at Choengam-ri, Jinsang-myun, Gwangyang-si, Jeonnam-Do Monitoring results for groundwater irrigation water quality, and salinity showed a remarkable difference between control and treatment group. The salinity of soil at treatment group was less than at control group. While, the system made possible to increase the squash quantity from 4.7 ea to 6.3 ea at each and the average weight of the harvested squash was increased from 277.2 g to 295.1 g. The applied brackish water desalination system may be appled to reclaim sea or brackish irrigated area as alternative water resources, although long-term monitoring is needed to get more representative results at different level of salinity.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제8권2호
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• pp.240-249
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• 2002

최근 인터넷 환경 속에서 이동 에이전트와 관련된 기술들이 지속적인 관심과 연구의 대상이 되고 있다. 이동 에이전트는 사용자가 정한 여정 리스트에 따라 자율적으로 이동을 하며 사용자의 요구사항을 대신하는 대리인의 역할을 한다. 이러한 이동 에이전트를 통해 분산 환경 속에서 여러 가지 이득을 얻을 수 있게 되었다. 하지만, 이동 에이전트는 보안상 많은 취약점을 가지고 있다. 특히 이동 에이전트에 대한 불법적인 호스트의 공격은 이동 에이전트가 상업적으로 널리 이용될 수 있는데 있어서 가장 큰 걸림돌이 되고 있다. 이에 따른 이동 에이전트 자체에 대한 보안으로 많은 연구가 진행되고 있다. 이 논문에서는 이동 에이전트가 가지고 있는 이동성에 따른 위험성을 여정 리스트의 분석을 통해 제거하고 코드의 중요도에 따라 코드를 분할 및 재생성하여 이동 에이전트 자체의 보안을 유지하고자 한다. 또한 이러한 이동 에이전트의 분할 및 재생성을 수행하는 역할을 이동 에이전트 게이트웨이(MAG-Mobile Agent Gateway)로 설계 및 구현하였다. MAG을 통해 이동 에이전트는 보다 안전하게 사용자의 역할을 대신함으로 인해 이동 에이전트가 사용자의 역할을 안전하게 수행하는데 기여하고자 한다.

• 한국항해항만학회지
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• 제28권10호
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• pp.917-923
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• 2004

공간정도의 생산과 수요가 본격화되고 있으나 공간정보의 본질과 응용특성을 고려한 공간정보모델링체계에 대해서는 특성화된 연구가 충분히 수행되고 있지 않다. 특히, 기존의 모델링기법들은 대부분 정보의 표현과 분석기능을 대상으로 개발되었으므로 보다 고차원적인 의사결정지원과 자율적인 업무수행을 위한 이론적 모델의 개발에 대한 논의가 최근의 지식정보화환경에서 더욱 요구되고 있다. 본 논문에서는 공간정보시스템을 모델링하기 위한 여러 기반개념들과 모델링 유형에 대한 고찰을 통해, 기존 모델링 방법에 대한 문제점을 분석하여 효율적인 공간적 업무수행을 위한 요구사항을 도출한다. 또한, 도출된 공간정보모델링의 요구사항에 적합한 이론적인 접근방안으로서 에이전트 기반의 공간모델링 프레임워크를 제안하며, 이러한 프레임워크를 해양지리정보분야에 적용하기 위한 고려사항도 함께 제시한다.

• 정보화연구
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• 제11권3호
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• pp.285-310
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• 2014

인터넷을 기반으로 한 서비스가 확대되면서 전통적인 인재교류시장 환경에 대한 대안으로 인터넷을 통해 구직자의 취직 환경을 촉진 지원하며, 구직자가 자기 주도적으로 취직하도록 도와주는 취업정보 사이트가 빠르게 확산되고 있다. 이에 취업정보 사이트의 품질에 대하여 영향을 미치는 직간접적인 요인들도 증가하고 있다. 한국과 마찬가지 중국에서도 취업정보 사이트 품질에 영향을 미치는 요인의 중요성을 인식하고 있다. 그러나 아직 중국 구직자가 취업정보 사이트를 효과적으로 활용하는 비율이 한국보다는 낮고 취업정보 사이트의 영향요인에 관한 한국과 중국 간 비교 연구가 충분히 이루어지지 않았다. 본 연구에서는 한국과 중국의 서로 다른 온라인 취업 환경에서 구직자에게 영향을 줄 것이라고 생각하고 먼저 취업정보 사이트를 이용한 경험이 있는 한국과 중국 대학생 및 대학원생을 대상으로 양국 간의 취업정보 사이트의 품질요인에 대한 인식도 차이를 알아보고 국가별 특성에 적합한 웹 서비스를 제공할 때 효율적으로 활용이 가능한 유용한 시사점을 도출하였다.

• 한국해양바이오학회지
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• 제9권2호
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• pp.22-29
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• 2017

A unicellular green alga was axenically isolated from the Port of Jeongja, Ulsan, Korea. Morphological, molecular, and biochemical analyses revealed that the isolate belonged to Heterochlorella luteoviridis. This is the first report of this species in Korea. The microalgal strain was named as H. luteoviridis MM0014 and its growth, lipid composition, and biomass properties were investigated. The strain thrived over a wide range of temperatures ($5-30^{\circ}C$) and withstood up to 0.5 M NaCl. The results of gas chromatography/mass spectrometry analysis showed that the isolate was rich in nutritionally important polyunsaturated fatty acids. Its major fatty acids were linoleic acid (35.6%) and ${\alpha}$-linolenic acid (16.2%). Thus, this indigenous marine microalga is a potential alternative source of ${\omega}3$ and ${\omega}6$ polyunsaturated fatty acids, which are currently obtained from fish and plant oils. Ultimate analysis indicated that the gross calorific value was $19.7MJ\;kg^{-1}$. In addition, the biomass may serve as an excellent animal feed because of its high protein content (51.5%). Therefore, H. luteoviridis MM0014 shows promise for applications in the production of microalgae-based biochemicals and biomass feedstock.

• 의학교육논단
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• 제17권3호
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• pp.110-121
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• 2015

Competency-based medical education (CBME) is an outcome-oriented curriculum model for medical education that organizes learning activities and assessment methods according to defined competencies as the learning outcomes of a given curriculum. CBME emerged to address the accountability of medical education in response to growing concerns about the patient safety in North America in the 1970s, and the number of medical schools adopting CBME has dramatically increased since 1990. In Korea, CBME has been under consideration as an alternative curriculum model to reform medical education since 2006. The purpose of this paper is three-fold: (1) to review the literature on CBME to identify the challenges and benefits reported in North America, (2) to summarize the process and experiences of planning and implementing CBME at Inje University College of Medicine, and finally (3) to provide recommendations for Korean medical schools to be better prepared for the successful adoption of CBME. In conclusion, one of the key factors for successful CBME implementation in Korea is how well an individual school can modify the current curriculum and rearrange the existing resources in a way that will enhance students' competencies while maximizing the strengths of the school's existing curriculum.

• 한국분무공학회지
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• 제19권3호
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• pp.115-122
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• 2014

As a demand for an automobile increases, air pollution and a problem of the energy resources come to the fore in the world. Consequently, governments of every country established ordinances for green-house gas reduction and improvement of air pollution problem. Especially, as international oil price increases, engine using clean energy are being developed competitively with alternative transportation energy sources development policy as the center. Bio ethanol, one of the renewable energy produced from biomass, gained spotlight for transportation energy sources. Studies are in progress to improve fuel supply methods and combustion methods which are key features, one of the engine technologies. DI(Direct Injection), which can reduce fuel consumption rate by injecting fuel directly into the cylinder, is being studied for Green-house gas reduction and fuel economy enhancement at SI(Spark Ignition). GDI(Galoine Direct Injection) has an advantage to meet the regulations for fuel efficiency and $CO_2$ emissions. However it produces increased number of ultrafine particles, that yet received attention in the existing port-injection system, and NOX. As fuel is injected into the cylinder with high-pressure, a proper injection strategy is required by characteristics of a fuel. Especially, when alcohol type fuel is considered. In this study, we tried to get a base data bio-ethanol mixture in GDI, and combustion for optimization. We set fuel mixture rate and fuel injection pressure as parameters and took a picture with a high speed camera after gasoline-ethanol mixture fuel was injected into a constant volume combustion chamber. We figured out spraying characteristic according to parameters. Also, we determine combustion characteristics by measuring emissions and analyzing combustion.

• 한국자동차공학회논문집
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• 제22권2호
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• pp.67-75
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• 2014

Biodiesel as alternative fuels has been widely studied due to biodiesel merits such as lower sulfur, lower aromatic hydrocarbon and higher oxygen content. But biodiesels could be easily oxidized by several conditions. In this study, various antioxidants such as propyl gallate, TBHA, TBHQ, DTBHQ, butyl-amin, aniline and pyrogallol were added in the biodiesel produced by the used cooking oil, then the material property test and the vehicle emissions test were conducted in accordance with test method. From the results of material property test, all antioxidants were suitable for the quality standard of density and kinematic viscosity, but Propyl gallate and Pyrogallol, as a type of Gallate additives, showed that the result of TAN increased rapidly according to the increase of the amount of additives. In the oxidation stability test, TBHQ, Butyl-amine and Aniline showed the excellent oxidation stability. Also, when considering the material property test, TBHQ was verified to the most excellent additives. In case of the vehicle emissions test, the testing was conducted by using the biodiesel added by TBHQ and was conducted by using two light duty diesel vehicles suitable for the EURO 4 and EURO 5 emission regulation. The result of testing showed that when the TBHQ was added, the amounts of CO, NOx and NMHC+NOx were decreased but the amount of $CO_2$ was increased.