• Proceedings of the KIPE Conference
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• 전력전자학회 2014년도 전력전자학술대회 논문집
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• pp.445-446
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• 2014

계통 연계형 3상 인버터는 계통과 연계 운전을 위해 전력 계통과 동기화시키는 PLL 알고리즘을 사용하게 된다. 본 논문에서는 정상분 전압을 추출하는 PLL 사용을 전제로 계통 전압의 센싱 옵셋이 발생한 경우 PLL 알고리즘을 안정적으로 동작시키기 위한 PLL 보상 방법을 제안한다.

• Proceedings of the Zoological Society Korea Conference
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• 한국동물학회 1999년도 한국생물과학협회 학술발표대회
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• pp.44.2-44
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• 1999

No Abstract, See Full Text

• Proceedings of the PSK Conference
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• 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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• pp.271.1-271.1
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• 2003

In order to find the new hepatoprotective agents the preliminary screening of 12 prescriptions which have been used for the treatment of hepatic disease in Oriental traditional medicine has been carried out. Both DPPH free radical scavenging and hepatoprotective effect on tacrine-induced cytotoxicity in Hep G2 cells are performed. (omitted)

• KIEE International Transactions on Electrophysics and Applications
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• 제4C권4호
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• pp.160-164
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• 2004

In this study, we demonstrate for the first time a bio-inspired Cell-Microsystem to manipulate and detect living cells. Cultured retinal pigment epithelial cell line (ARPE-19) was directed to grow in a pre-defined Cell-Microsystem. The three-dimensional micropillars of 5 ${\mu}{\textrm}{m}$ in height and diameter of the Cell-Microsystem were fabricated. Inhibited DNA synthesis and transformed cell morphology were observed throughout the culture period. The demonstration of manipulating and detecting living cells by the surface topography is a new approach, and it will be very useful for the future design of cell-based biosensors and bioactuators.

• Bulletin of the Korean Chemical Society
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• 제31권5호
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• pp.1247-1251
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• 2010

We propose an improved solvent contact model to estimate the solvation free energies of amino acids from individual atomic contributions. The modification of the solvation model involves the optimization of three kinds of parameters in the solvation free energy function: atomic fragmental volume, maximum atomic occupancy, and atomic solvation parameters. All of these atomic parameters for 17 atom types are developed by the operation of a standard genetic algorithm in such a way to minimize the difference between experimental and calculated solvation free energies. The present solvation model is able to predict the experimental solvation free energies of amino acids with the squared correlation coefficients of 0.94 and 0.93 for the parameterization with Gaussian and screened Coulomb potential as the envelope functions, respectively. This result indicates that the improved solvent contact model with the newly developed atomic parameters would be a useful tool for the estimation of the molecular solvation free energy of a protein in aqueous solution.

• Korean Journal of Computational Design and Engineering
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• 제17권2호
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• pp.79-90
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• 2012

In digital virtual manufacturing simulation, Digital Human widely used to optimal workplace design, enhancing worker safety in the workplace, and improving product quality. However, the case of ergonomics simulation solutions to support digital human modeling, Optimal DHM (Digital Human Model) data needed to develop and perform DHM will collect information related to the production process. So simulation developer has burden of collecting information. In this study, to overcome the limitations of existing solutions, we proposed the ADAGIO(Automated Digital humAn model development for General assembly usIng Ontology) framework. The ADAGIO framework was developed for DHM ontology to support optimal deployment of digital virtual environment and in order to ensure consistency of simulation components that are required for simulation modeling was made of a library.

• 한국정보교육학회:학술대회논문집
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• 한국정보교육학회 2007년도 하계학술대회
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• pp.27-32
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• 2007

인터넷이 발전함에 따라 정보화의 역기능 현상들도 방대해지고 있으며, 그에 대한 피해도 증가하고 있다. 이러한 상황 속에서 정보통신 윤리교육은 학생 개개인의 정보통신 윤리의식 수준과 정보화 역기능의 진단 및 파악 없이 동일한 교육 내용으로 이루어져 있기 때문에 체계화된 정보통신 윤리교육이 이루어지지 않고 있으며, 학생들의 정보통신 윤리의식조차 불명확해지고 있다. 이는 정보화의 역 기능으로 인해 발생되는 문제를 미리 예방할 수 없으며, 그에 대한 대처도 어렵게 하고 있다. 따라서 본 논문에서는 학생들의 정보화 사회의 역기능인 인터넷 중독을 진단하고 하위 중독 범주들 간의 연관 관계를 데이터마이닝 기법으로 탐사하여 개인별 추출 결과에 따른 특성화된 정보 통신 윤리 교육 방법을 설계하고자 한다.

• Korean Journal of Head & Neck Oncology
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• 제20권1호
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• pp.49-51
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• 2004

A choristoma is a tumor like mass of normal tissue in an abnormal location. Lingual osseous choristoma, previously known as osteoma of the tongue base, is rare entity. That is defined as a normal bone mass occuring in the soft tissue of either the skin or the mucosa of oral cavity. The cause of osseous choristoma of the tongue is still unknown, but only several theories have been suggested. Because of the rarity of this entity, our purpose is to add our case to the literature, and to discuss the nature of the disease.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 한국전기전자재료학회 1995년도 춘계학술대회 논문집
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• pp.167-171
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• 1995

The orientation dependence of sputtering rate in the sendust polysrystalline targets was studied, It was fount from the present work that the erosion process is not uniform from one grain to another even within a target because of its polysrystalline nature showing many different orientation of grains. The grains oriented to promote efficient erosion were characterized by the close-packed planes which have large interplanar spacing and strong binding energy, The characteristic line patterns appeared on as-sputter target surface are discussed in terms of symmetry of crystllographic planes.

• 대한예방의학회:학술대회논문집
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• 대한예방의학회 2001년도 제53차 추계 학술대회 연제집
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• pp.208-209
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• 2001