• Proceedings of the Korean Information Science Society Conference
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• 2005.11b
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• pp.496-498
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• 2005

RFID 응용프로그램은 필요한 기능을 수행하기 위하여 하위의 ALE Interface를 이용하거나 EPCIS 등의 외부 시스템과 통신을 해야 한다. 이러한 동작을 수행하기 위하여 해당 응용프로그램 개발자는 하위 ALE Interface를 사용하기위한 방법과 다른 추가 시스템의 사용법을 배워야 하고 정해진 통신 방법에 따라 프로그램을 작성해야 한다. 이러한 작업은 RFID에 대한 지식수준과 프로그래밍 실력에 따라 많은 시간과 노력을 필요로 하게 된다. 본 논문에서는 이러한 RFID 응용 프로그램 개발 시의 어려움을 최소화 하고자 Business Event Framework(BEF)을 제안한다. BEF는 비즈니스 로직과 직접적으로 관련이 없는 부분은 BEF가 직접수행하고 응용프로그램에서 꼭 필요한 이벤트만을 반을 수 있도록 지원하는 라이브러리이다.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2011.04a
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• pp.557-560
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• 2011

In the present paper, the sloshing resistance performance of an LNG carrier insulation system is evaluated by fluid-structure interaction (FSI) analysis. For this analysis, the arbitrary Lagrangian Eulerian (ALE) method is adopted to accurately calculate the structural behavior induced by internal LNG motion of a KC-1 type LNG carrier cargo tank. In addition, the global-local analysis method is introduced to reduce computational time and cost. The global model is built from shell elements to reduce the sloshing analysis time. The proposed novel analysis techniques can potentially be used to evaluate the structural integrity of LNG carrier insulation systems.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.895-896
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• 2006

This paper proposes a new method to measure the ECG signal from the driver. The ECG signal is often measured in the room. But it is mixed with many kinds of noise when we measure it during the vehicle moving. We classified noise occupied most many parts as the experimental among them. And we designed one suitable filter for each noise. It used ALE(Adaptive Line Enhancement) to remove the noise occurred to electromagnetic wave in vehicle. To remove the noise occurred to steering or vibration of vehicle, we used Wavelet transformation after ALE(preprocessing filter).

• Proceedings of the KSME Conference
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• 2008.11b
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• pp.2410-2414
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• 2008

Human heart valves diseased by congenital heart defects, rheumatic fever, bacterial infection, cancer may cause stenosis or insufficiency in the valves. Treatment may be with medication but often involves valve repair or replacement (insertion of an artificial heart valve). Bileaflet mechanical heart valves (BMHVs) are widely implanted to replace the diseased heart valves, but still suffer from complications such as hemolysis, platelet activation, tissue overgrowth and device failure. These complications are closely related to both flow characteristics through the valves and leaflet dynamics. In this study, the physiological flow interacting with the moving leaflets in a bileaflet mechanical heart valve (BMHV) is simulated with a strongly coupled implicit fluid-structure interaction (FSI) method which is newly organized based on the Arbitrary-Lagrangian-Eulerian (ALE) approach and the dynamic mesh method (remeshing) in FLUENT. The simulated results are in good agreement with previous experimental studies. This study shows the applicability of the present FSI model to the complicated physics interacting between fluid flow and moving boundary.

• Wind and Structures
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• v.3 no.4
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• pp.291-302
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• 2000

A new finite element technique to solve the problem of wind and structure interactions is presented. Conventionally, wind analysis is performed on the Eulerian description in which the finite element mesh would not move in accordance with the wind flow. However, it is not the case in wind-structure interaction problems because nodes attached to the surface of structure should move with the displacement of structure. The arbitrary Lagrangian-Eulerian (ALE) method treats the mesh and flow independently, and allow the mesh to move. In this study, the analysis domain is divided into regions of the structure, air around the structure and the interface of two regions. To satisfy the compatibility and equilibrium conditions between separated regions and to carry out the efficient analysis, the rigid link is used. Also the equation of wind and that of structure are arranged in a single matrix equation.

• The Transactions of the Korean Institute of Electrical Engineers
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• v.36 no.11
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• pp.819-825
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• 1987

The ALE problem, which tries to recover a sinusoidal signal corrupted by noise, has been solved using FIR filters. Recently several methods have been proposed using a norch filter of IIR type. In this study, the notch filter was represented with a parameter and auxiliary signals were generated by using an adaptive observer. A simple method is proposed to estimate the parameter. This method is tested under various circumstances by changing the input frequency, S/N ratio, and the type of the noise. The simulation shows that this method gives much better results than the other known methods with respect to the input S/N ratio and converging times. This method is simple and does not require much conputation, so it can be easily implemented in real time applications.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.05a
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• pp.541-544
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• 2008

e-비즈니스 환경 하에서 전자적 데이터 교환 또는 WEB을 이용한 비즈니스 트랜잭션 처리를 통해 산업 부분별 자동화나 정보화가 활발히 진행되었다. 전자적으로 데이터를 처리함으로 인해 기존 오프라인을 이용한 비즈니스 환경 보다는 처리 속도나 처리 시간이 단축되었으며 비용도 많이 절감되었다. 그러나 점차 실시간적으로 데이터를 처리하거나 실시간적으로 화물에 대한 흐름을 추적하고자 하는 사용자들의 요구사항이 도출되기 시작하였다. 이에 RFID, USN 등의 유비쿼터스 개념과 기술을 이용한 u-비즈니스가 도입되어 각 분야에 활발히 적용되고 있다. 특히 유통이나 운송 등 물류 분야에 유비쿼터스 기술이 적용됨으로 실시간으로 데이터를 수집할 수 있어 화물의 흐름 추적을 용이할 수 있는 기반이 되고 있다. 본 논문에서는 새로운 비즈니스 환경에 적합하도록 EPC Global 표준에 따라 개발된 RFID 미들웨어를 항만 물류 비즈니스에 적용할 수 있는 비즈니스 모델을 정의하였다. 또한 정의한 비즈니스 모델을 항만 물류 분야에 적용한 사례와 적용 결과에 대해 논의하고자 한다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2002.11a
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• pp.54-59
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• 2002

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.08a
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• pp.147.2-147
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• 1998

• Journal of the Korea Society of Computer and Information
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• v.17 no.1
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• pp.193-202
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• 2012

RFID tag awareness information and sensor data continuously change, and are categorized with the position. They are able to similar data in the side, called massive data to change in time. If two data are managed together, a convergence process of object awareness along change of environment is possible. If RFID middleware and EPCIS repository realized the integrated system, it is usable with the functions of middleware and repository at the same time. The real-time awareness information retrieval is possible without process, getting information from another middleware. In this paper, it is able to continuously read information from RFID reader and sensor equipment and store to database in order to make general object awareness and an object retrieval dependent on an environmental information change possible by real time. ALE-compliant middleware and EPCIS repository proposing for standards at EPCglobal is designed and implemented to be able to deal with RFID and sensor data to bases on the collected data.