• 정보처리학회논문지D
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• 제11D권3호
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• pp.671-682
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• 2004

다양한 정보기술의 등장과 소프트웨어 복잡성의 증가로 소프트웨어 개발 비용과 노력이 크게 증가하고 있다. 컴포넌트 기반 개발(CBD) 기술은 높은 재사용과 유지보수성을 제공하여 비용과 노력을 크게 절감하는 새로운 방법으로 각광을 받고 있다. CBD에서는 컴포넌트의 사용자가 컴포넌트를 이용해 고유의 도메인에 맞는 시스템을 구축하기 위한 컴포넌트의 가변적인 부분을 가지고 있다. 컴포넌트 내부의 가변적인 부분은 사용자가 컴포넌트에서 제공하는 기능인 Required 인터페이스를 통하여 쉽게 설정할 수 있다. Enterprise JavaBeans(EJB)은 Java 기반의 컴포넌트를 구현할 수 있는 상용 규격으로 활용되고 있다. 그러나 EJB에서 Required 인터페이스를 직접 구현할 수 있는 장치가 제한적이다. 본 논문에서는 EJB 환경에서 Required 인터페이스를 효과적으로 정의하고 子현하기 위한 인터페이스 저장형 기법, 클래스 저장형 기법, 인터페이스 생성형 기법, Plug-in 기법을 제안한다. 인터페이스 저장형 기법은 가변적인 설정 값들은 Required 인터페이스에서 저장하고 있으며 클래스 저장형 기법은 컴포넌트 분석 모델의 수정 없이 가변성을 가진 빈들이 Required 인터페이스로 설정된다. 인터페이스 생성형 기법은 컴포넌트의 가변성을 위한 Required 인터페이스 역할의 민을 새롭게 생성하며 Plug-in 기법은 사용자가 외부로부터 가변적인 부분을 플러그인 하여 가변성을 설정할 수 있다. 제시된 4가지 기법들은 CBD 컴포넌트의 Required 인터페이스의 의미를 보존하며 높은 품질의 컴포넌트 구현을 가능하게 한다.

• 한국정보과학회논문지:소프트웨어및응용
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• 제31권10호
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• pp.1286-1303
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• 2004

컴포넌트 기반 개발은 재사용 단위의 컴포넌트를 사용한 경제적인 소프트웨어 개발 패러다임으로 학계와 산업계에 폭넓게 사용되고 있다. 잘 정의된 컴포넌트 인터페이스는 컴포넌트 사이의 저결합도와 의존도를 관리하며, 재사용과 확장성 및 유지보수성을 향상시키는 매개체가 된다. 따라서 컴포넌트가 도입된 이후 컴포넌트 인터페이스의 체계적인 개발 프로세스와 설계 지침에 대한 연구와 방법이 요구되어 왔다. 본 논문에서는 소프트웨어 아키텍쳐 계층 및 기능 유형에 따라 컴포넌트 기능을 제공하는 Provided, 요구하는 기능을 명세단위로 제공하는 Required와 사용자의 요구에 맞게 컴포넌트를 특화하는 Customize 인터페이스를 제시하며, 인터페이스 설계를 위한 기준을 마련하여 체계적인 설계 프로세스 및 지침을 고안한다. 먼저 아키텍쳐 계층별 Provided긴 인터페이스를 식별하기 위해 유즈케이스 모델과 클래스 모델 등에서 추출된 오퍼레이션을 클러스터링하며. 컴포넌트 내 식별된 가변성 배치 산출물에 기반하여 Customize 인터페이스를 설계한다. 또한 인터페이스 의존도에 따라 컴포넌트 기능 수행시 요구되는 Required 인터페이스를 명세로 제공한다. 제시된 설계 지침은 설계 전 과정을 통해 추적성이 보장되며, 사례연구를 통하여 고품질의 컴포넌트 인터페이스를 위한 실용적인 설계 기법의 토대를 마련한다.

• Journal of Communications and Networks
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• 제6권4호
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• pp.295-306
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• 2004

In this paper, a novel air-interface is presented for Fleet-Net1, a self-organizing network for inter-vehicle and vehicle-toroadsidecommunication. The air-interface is based upon the lowchip-rate version of UMTS/TDD. To adapt the cellular UMTS standard to an air-interface for ad hoc networks, changes of the physical layer, medium access control sub-layer and radio resource management are required. An overview of the required modifications is given here. Particularly, a decentralized synchronization mechanism is presented and analyzed by means of simulations. Furthermore, changes for the medium access control are explained in detail, which allow for an efficient operation in partly meshed networks and prioritization. Performance results of the overall system considering throughput and delay are derived by means of analytical evaluations and event-driven simulations. Based on realistic mobility models, it is shown that the presented solution provides a robust communication platform even in vehicular environments. The proposed air-interface is a cost-effective solution not only for inter-vehicle communication, but also for ad hoc networking in general, benefiting from the mass-market of UMTS.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.1408-1415
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• 2007

To operate Platform Screen Door (PSD) automatically, the operational data of PSD and the train must be interfaced properly. PSD and train are operated together by the signaling system in Automatic Train Operation (ATO) signaling system zone where interfaces are provided between PSD and train. However, the additional PSD interface system with train is required in train operating zone without the interface between PSD and train. For the PSD interface, the wireless communication system or the train status (train correct stop status / train door status) detection system has been used. Seoul Metro line No.2. has the PSD wireless communication system using 447MHz band RF. For the safety of PSD operation, it is required to prevent RF interference in the subway environment where many frequencies exist. In this paper, the PSD wireless communication system is developed using 2.4GHz band RF to prevent the interference of the wireless communication and increase the traffic of the PSD interface. Furthermore, the improved system can store, manage and display the PSD and train operational data using Human Machine Interface (HMI) in the train's driver cab.

• 한국실내디자인학회논문집
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• 제30호
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• pp.86-91
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• 2002

HCI (Human Computer Interface)is important key of software design. Effectiveness and productivity of CAD software is creation is not study actively in architectural part. The results of this study \circled1 HCI of architectural modeling is demanded effective design of keypad and short key. \circled2 It is require that system reactions to be united in one interface in order to hold in check confusion of the information. \circled3 Intelligent interface for continuous update of 3D information is required.

• Journal of Power Electronics
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• 제11권1호
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• pp.1-9
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• 2011

This paper describes a two quadrant bidirectional soft switching converter for ultra capacitor interface circuits. The total efficiency of the energy storage system in terms of size and cost can be increased by a combination of batteries and ultra capacitors. The required system energy is provided by a battery, while an ultra capacitor is used at high load power pulses. The ultra capacitor voltage changes during charge and discharge modes, therefore an interface circuit is required between the ultra capacitor and the battery. This interface circuit must have good efficiency while providing bidirectional power conversion to capture energy from regenerative braking, downhill driving and the protecting ultra capacitor from immediate discharge. In this paper a fully soft switched two quadrant bidirectional soft switching converter for ultra capacitor interface circuits is introduced and the elements of the converter are reduced considerably. In this paper, zero voltage transient (ZVT) and zero current transient (ZCT) techniques are applied to increase efficiency. The proposed converter acts as a ZCT Buck to charge the ultra capacitor. On the other hand, it acts as a ZVT Boost to discharge the ultra capacitor. A laboratory prototype converter is designed and realized for hybrid vehicle applications. The experimental results presented confirm the theoretical and simulation results.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2004년도 추계 학술발표회 제16권2호
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• pp.105-108
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• 2004

In general, the nonlinear behavior of composite structures composing of steel and concrete is analyzed on the basis of the assumption of the perfect bond actions in steel-concrete interface in which the interface slip or separation is not allowed. The assumption is based on the fact that the full interface bond behavior is provided with the mechanical connectors of studs. However, since the number and spacing of the studs are determined by the stress resultants calculated in the interface area, the interface analysis is required to evaluate the stress resultants. This paper describes the nonlinear steel-concrete interface behavior considering the two interface failure mechanisms of slip and separation. Elastoplastic constitutive relation is developed. thru the formulation framework using the two energy dissipation mechanisms. As the result, the steel plate push-out tests sandwitched between concrete blocks are analyzed and compared with the test results with which the good agreements are observed.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 추계학술대회 논문집
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• pp.1461-1466
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• 2004

Recently Domestic EMU's on board signal systems are gradually changed form Cab signal(Fix Block) to Distance-to-go. Interfaces with on board signal system, TCMS Redundancy structure is mainly required. This paper suggest Manaul/Automatic Driving based on TCMS-ATC interface and design of backup system which is operated by Stan-by Computer when one of it's Local Interface Unit(LIU) is out of oder. For the purpose of Precision Train Stop, Distance-to-go signal system require accuracy speed. Free-axle structure is required for this system This paper suggest Free-axle braking system that lack of brake-force is compensated by the distributed brake-force using TCMS. And one of braking system has out of order, compensation of brake-force for Free-axle system. Then we prove our design to Complete Car Test

• Journal of Information Processing Systems
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• 제8권2호
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• pp.315-330
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• 2012

Recently, methodologies for developing brain-computer interface (BCI) games using the BCI have been actively researched. The existing general framework for processing brain waves does not provide the functions required to develop BCI games. Thus, developing BCI games is difficult and requires a large amount of time. Effective BCI game development requires a BCI game framework. Therefore the BCI game framework should provide the functions to generate discrete values, events, and converted waves considering the difference between the brain waves of users and the BCIs of those. In this paper, BCI game frameworks for processing brain waves for BCI games are proposed. A variety of processes for converting brain waves to apply the measured brain waves to the games are also proposed. In an experiment the frameworks proposed were applied to a BCI game for visual perception training. Furthermore, it was verified that the time required for BCI game development was reduced when the framework proposed in the experiment was applied.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2003년도 봄 학술발표회 논문집
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• pp.859-864
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• 2003

In these days, the deterioration of bridges make it necessary for decks to be replaced and it is inevitable to apply the precast decks to minimize the traffic control induced from the deck placement. This precast deck construction makes the physically discontinuous interface between old and new concrete. Usually, the adhesive force at this interface are ignored. However, for crack behavior and reliable long term behavior, it is required to evaluate the exact value of the cohesive force at the interface. This research investigates the cohesive characteristics at the interface. Four different interface surface conditions are tested and three different methods are used to measure the cohesive strength at the interface. In addition, cohesive characteristic at the surface between precast panels are investigated with different interface surface conditions.