• 한국생물공학회:학술대회논문집
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• 2005.04a
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• pp.296-299
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• 2005

Sugar polymers have been considered as biomaterial. Biomaterials are widely utilized for a medical applications in direct contact with living tissue Clearly, biomaterials must be carefully and microscopically fabricated for optimal acceptance within the living organism in both functional and structural senses. In this study, the enzymatic synthesis of sorbitan methacrylate from 1,4-sorbitan via the manipulation of an immobilized biocatalyst (Novozym 435) and acryl donors (methacrylic acid and vinyl methacrylate) was evaluated.

• International Journal of Ocean System Engineering
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• v.3 no.1
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• pp.38-43
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• 2013

Wind turbine generator is, recently, becoming bigger and bigger. So, in order to produce large amounts of electricity generation, we have to consider the length and thickness of the blade. We investigated the skills of processing for making the super thickness laminate through development fabrication process for high speed curing composite heating table.

• The KSFM Journal of Fluid Machinery
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• v.3 no.2 s.7
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• pp.44-49
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• 2000

Small sonic nozzles (throat diameter $0.28{\~}4.48mm$) were tested in the gas flow standard system. This standard system is composed of two bell provers and 5 column piston provers, compressor, filters, and dehumidifier. The discharge coefficients of small some nozzles are obtained and correlated as a function of throat Reynolds numbers with $0.316\%$ uncertainty at a confidence level $95\%$. The tested high Reynolds number was the lower limit of ISO 9300 specifications. The data are useful as data base for revision of ISO 9300.

• 시스템엔지니어링워크숍
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• s.4
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• pp.182-187
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• 2004

Our research proposes how to, systematically, count function point from initial functional requirements based on natural language. Gradually, Function Point Analysis is used to overcome the limitation of LOC(Line Of Code) for estimating software size. Moreover, it plays an important role in cost management. Function point is derived from initial requirements and is determined by experts who have an education for function point. However, currently there are few researches to cout function point by systematic or automatic rules. Through extending our porposed method, we expect that function point is able to be counted automatically or semi-automatically. This would be our future research

• Transactions of the Korean Society of Machine Tool Engineers
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• v.15 no.1
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• pp.49-55
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• 2006

The effect of coating temperature with regard to surface properties of TiN-coated layer on hard metal(WC-Co) are experimentally investigated. Hardness, surface roughness, TiN coating thickness and adsorption force were measured in order to evaluate the effect of coating temperature. The two-way ANOVA method is used in order to evaluate the experimental data. In AIP processing, It is concluded that the furnace temperature in the range of $400^{\circ}C\~500^{\circ}C$ affected to a little increasing the number of production with the coating temperature.

• Korean Journal of Head & Neck Oncology
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• v.31 no.2
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• pp.58-62
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• 2015

Benign symmetric lipomatosis, also known as Madelung's disease, Launois-Bensaude syndrome and multiple symmetric lipomatosis is a cutaneous condition characterized by extensive symmetric fat deposits in the neck, shoulders, and upper trunk. But symmetrical lipomatosis of the tongue is very rare and characterized by involvement exclusively of the tongue, invasiveness, and absence of encapsulation of the adipose tissue. A 75-year-old man presented with about a year history of painless tongue masses on both lateral border. Bilateral partial glossectomy was performed and subsequently was confirmed as symmetrical lipomatosis pathologically. We report this case with a review of the literatures.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06b
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• pp.124-127
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• 2011

새로운 비즈니스 환경 변화에 가장 빠르게 대응할 수 있는 최적의 대안으로 각광받고 있는 SOA(Service Oriented Architecture)는 현재 비즈니스 시장의 혁신과 변화를 주도하고 있다. 하지만 웹 기반인 SOA 기반 시스템은 품질평가에 대한 명확한 표준안이 제안되어 있지 않으며, 기존 소프트웨어 품질 평가를 통한 SOA 기반 시스템의 평가는 적절하지 않다. 본 논문에서는 기존 소프트웨어 품질 특성인 ISO/IEC 25000을 연구하고, AHP(Analytic Hierarchy Process) 기법을 통하여 SOA 기반 시스템에 알맞은 품질 특성을 도출하였다. 이를 통하여 SOA 기반 소프트웨어 개발 시 우선순위를 토대로 요구사항 분석이나 설계에 반영하여 최적화된 SOA 기반 시스템 구축이 가능하다.

• Journal of Mechanical Science and Technology
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• v.17 no.10
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• pp.1485-1495
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• 2003

We investigate the triboelectrostatic separation of polyvinylchloride (PVC) from mixed plastics in the laboratory scale triboelectrostatic separation system. The flow and electric fields in the precipitator are obtained from the numerical solution of finite volume method. Using these flow and electric fields, we solved the particle motion equation considering the inertia, drag, gravity and electrostatic forces acted on the particles. The particle trajectories are obtained using a Lagrangian method as a function of different important variables such as Reynolds number, Stokes number, electrostatic force, electric charge and electric field distribution, inclined angle of plane electrodes, particle rebounding, particle charge decay rate after impact on the electrode surface, etc., in order to determine the optimal design conditions. The present predicted results for the cumulative yield represent well the experimental ones.

• Journal of the Ergonomics Society of Korea
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• v.23 no.2
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• pp.13-24
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• 2004

Human error has brought about accidents more than 50% in system of a large size and complicated expecially in nuclear power plants(NPPs). The technology of Man Machine Interface(MMI) has been changed to the digitalized controls employing computer-based technology. According to this trend. the human factors guidelines are becoming main issue for reliable supports to digitalized information displays. However. the existing human factors guidelines is not enough for advanced information display on NPPs. The purpose of this research is to develop the reliable design and evaluation guidelines for advanced information display in main control room (MCR) of NPPs. In this study. the various general human factors guidelines concerning information display on CRT are integrated on data base management system. unified based on the integration rules. and applied in computer based procedures. The use of the integrated guidelines are expected to evaluate the existing information display on MCR in NPPs from the human factors point of view.

• Proceedings of the KIEE Conference
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• 1991.07a
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• pp.726-729
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• 1991

This paper proposes a new operation algorithm for elevator by considering both better service for passengers and minimization of energy consumption for elevator operation. The main idea of the proposed operation algorithm is based on the assumption that passengers push the numbered buttons indicating their destination, one of the main differences of proposed operation mode from the conventional one is that the elevator may move to the opposite direction for a few floors according to the rescheduled operational pattern determined by some factors. Some examples by computer simulation show the efficiency of the proposed operation algorithm.