• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.333-336
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• 2004

임베디드 소프트웨어 개발의 비중이 점차 높아져 감에 따라 임베디드 테스팅의 중요성이 부각되고 있다. 임베디드 테스팅과 일반적인 애플리케이션 테스팅은 많은 차이점이 있다. 일반 애플리케이션 테스팅은 개발 환경과 테스팅 환경이 동일하다. 그러나 임베디드 테스팅은 테스팅 대상이 플랫폼에 기반한 타겟이라는 점에서 여타의 애플리케이션 테스팅과는 다르다. 따라서 임베디드 테스팅을 위한 아키텍처 설계를 고려할 필요가 있다. 임베디드 테스팅을 위한 아키텍처들이 몇몇 제시되고는 있지만 실제 적용해서 사용하기에는 여러 가지 문제점이 존재한다. 본 연구는 애플리케이션 테스팅의 아키텍처를 비교, 분석하고 임베디드 테스팅에 적용 가능한 요소들을 추출한다. 또한 임베디드 테스팅을 위한 여러 아키텍처를 비교, 분석하여 임베디드 테스팅에 커스터마이즈 된 아키텍처를 설계하고자 한다. 향후에는 본 연구에서 제안된 아키텍처를 기반으로 실제 임베디드 테스팅에 적용하고자 한다.

• Earthquakes and Structures
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• v.16 no.4
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• pp.455-468
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• 2019

The behavior of pile-deck connections of pile-supported marginal wharfs subjected to earthquake loading is of key importance to ensure a good performance of this type of structures. Two precast-pretensioned pile-deck connections used in the construction of pile-supported marginal wharfs were tested under cyclic loading. The first is a connection with simple reinforcement details and light steel ratio developed for use where moderate pile-deck rotation demands are expected in the wharf. The second is specifically developed to sustain the large rotation, shear force and bending moment demands, as required for the shortest piles in a marginal wharf. Data obtained from the test program is used in the paper to calibrate an equivalent plastic hinge length that can be incorporated into nonlinear analysis models of these structures when prestressed pile-deck connections with duct embedded dowels are used.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.11a
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• pp.1621-1624
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• 2010

디스플레이 모듈 검사 장치는 디스플레이 모듈 제조공정 및 품질보증부서에서 주로 사용되며, 디스플레이 모듈의 불량유무를 확인하여 디스플레이 출하 제품의 품질을 높이는 장비이다. 기존의 검사장비는 부피가 크고 별도의 프로그램을 통하여 PC에서 제어하는 형태로 되어 사용이 불편하고 휴대가 어려운 문제가 있다. 이러한 문제를 해결하기 위하여 본 논문에서는 소형 휴대형 디스플레이 모듈 검사 장치를 설계 및 구현하였다. 설정데이터 전송 및 1600*1200크기의 EPD 디스플레이에 JPEG/BMP정지영상을 출력하여 BMP재현함으로 검사기기의 성능을 검증하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.04a
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• pp.678-680
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• 2009

본 논문에서는 성능 분석과 검증을 위한 방법으로 가상화 기법을 이용하여 성능을 분석할 수 있는 도구를 제안한다. 가상 머신의 성능 분석을 통해 원하는 이벤트들의 발생 양상에 따른 시스템의 성능을 호스트 머신에서 파악할 수 있다. 즉 가상 머신에서 사용하는 자원과 발생하는 이벤트에 대한 정보를 호스트 머신에서 확인할 수 있고, 가상 머신에서 발생한 사용자 입력을 호스트 머신이 임의로 재생시킬 수 있다. 이러한 기능을 통해 사용자 입력 패턴에 따른 시스템 자원의 상태 및 성능을 분석하여, 해당 시스템의 안정성을 시험할 수 있는 검증 환경을 제공한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.11a
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• pp.368-371
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• 2007

모바일 어플리케이션 소프트웨어의 시장은 여러 소프트웨어 시장 중 가장 많은 어플리케이션 소프트웨어를 출시하고 있으며 모바일 어플리케이션에서 가장 중요한 사용자와의 정보 교환 수단으로는 GUI가 있다. 현재까지의 모바일 어플리케이션에서의 GUI 테스트 방법으로는 테스터가 한단계, 한단계 버튼을 눌러가며 화면을 체크하는 원시적인 방법의 테스트가 이루어지고 있다. 이에 본 논문에서는 모바일 상에서 이루어지는 정적 화면 전환의 경우 테스트 수행 결과를 플로우 챠트 기반으로 표시함으로써 GUI를 테스트 하는 방법을 제시하고 테스트 커버리지 까지 측정할 수 있는 방법을 제시한다.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.49 no.8
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• pp.55-62
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• 2012

The development of memory design and process technology enabled the production of high density memory. As the weight of embedded memory within aggregate Systems-On-Chips(SoC) gradually increases to 80-90% of the number of total transistors, the importance of testing embedded dual-port memories in SoC increases. This paper proposes a new micro-code based programmable memory Built-In Self-Test(PMBIST) architecture for dual-port memories that support test various test algorithms. In addition, various test algorithms including March based algorithms and dual-port memory test algorithms are efficiently programmed through the proposed algorithm instruction set. This PMBIST has an optimized hardware overhead, since test algorithm can be implemented with the minimum bits by the optimized algorithm instructions.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.47 no.6
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• pp.43-50
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• 2010

In this paper, the TWTA (Traveling Wave Tube Amplifier) maintenance system for the low altitude surveillance Radar was developed using the embedded Linux system, and its superiority was demonstrated through the performance test. Nowadays, the necessity of maintenance system and reliability testing on military equipments has been increasing steadily. In addition, nonlinear characteristics of the maintenance system for the low altitude surveillance Radar are more likely to have serious problems as well as to slow down durability. Therefore, after analyzing characteristics of RF input-output signal and TWTA, we designed interface circuits between the TWTA equipment and the embedded Linux system. The Linux kernel on the system was optimized to improve the efficiency and reliability. And our new TWTA maintenance system was evaluated in the real field. As a result, the proposed system was contented with desired specifications, and demonstrated military's fighting capabilities. Therefore, our novel system will advance military maintenance technology and will help to develop similar equipments.

• Journal of the Institute of Electronics and Information Engineers
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• v.50 no.2
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• pp.114-121
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• 2013

As the weight of embedded memory within Systems-On-Chips(SoC) rapidly increases to 80-90% of the number of total transistors, the importance of testing embedded memory in SoC increases. This paper proposes IEEE std. 1500 wrapper based Programmable Memory Built-In Self-Test(PMBIST) architecture which can support various kinds of test algorithm. The proposed PMBIST guarantees high flexibility, programmability and fault coverage using not only March algorithms but also non-March algorithms such as Walking and Galloping. The PMBIST has an optimal hardware overhead by an optimum program instruction set and a smaller program memory. Furthermore, the proposed fault information processing scheme guarantees improvement of the memory yield by effectively supporting three types of the diagnostic methods for repair and diagnosis.

• Journal of the Korean Geotechnical Society
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• v.16 no.4
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• pp.201-208
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• 2000

Axial load distribution in model piles was measured by fiber Bragg Grating(FBG) sensor to investigate a possibility of analyzing the load transfer mechanism by Fiber Optic sensor system. Since FBGs of different wave lengths can be multiplexed in an optical fiber, the installation of sensor system and the measurement of strains are relatively simple, compared with consisting strain gages. In this study, FBG sensors and electric strain gages were embedded in the same piles and the distributions of load transfer by two sensor systems were measured. It was observed from the test results that the variations of axial load by both systems showed insignificant difference and that the measurements by FBG were smoother than those by strain gage. Under the environments of laboratory testing, survival rate of embedded FBG system was higher than that of strain gage. Therefore, it was concluded that the use of FBG sensor has a great potential for the measurement of load transfer for pile foundation.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.6
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• pp.123-129
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• 2013

Android file system is vulnerable to the external access of system resources via its arbitrary access mode and need user's control for SD and UMS medias due to its open architecture. In response to the device control, there is a drawback that its controlability is valid only in the case of embedded linux kernel with VDC function. Hence the solution is to directly implement VDC through system call, with another security module for device storage than system module being added to android system. In this paper the new method of android storage access control for personal information is proposed via VDC for mount system of storage. The access method for SD and UMS were implemented using VDC and mount mechanism. This access control system has been designed to control the granted users in kernel level if files are flowed out by copying. As a result, it was proved through testing that the access control system has exactly detected the write access operation.