• Title/Summary/Keyword: 코아 테스트

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Exploiting an On/off-Chip Bus Bridge for an Efficiently Testable SoC (효율적인 SoC 테스트를 위한 온/오프-칩 버스 브리지 활용기술에 대한 연구)

  • Song, Jae-Hoon;Han, Ju-Hee;Kim, Byeong-Jin;Jeong, Hye-Ran;Park, Sung-Ju
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.45 no.4
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    • pp.105-116
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    • 2008
  • Today's System-on-a-Chip (SoC) is designed with reusable IP cores to meet short time-to-market requirements. However, the increasing cost of testing becomes a big burden in manufacturing a highly integrated SoC. In this paper, we propose an efficient test access mechanism that exploits an on/off-chip bus bridge for the Advanced High-performance Bus (AHB) and Peripheral Component Interconnect (PCI) bus. The test application time is considerably reduced by providing dedicated test stimuli input paths and response output paths, and by excluding the bus direction tumaround delays. Experimental results show that area overhead and testing times are considerably reduced in both functional and structural test modes. The proposed technique can be a lied to the other types of on/off-chip bus bridges.

A Experimental Study on the Evaluation of Deteriorated Concrete Member Exposed One Side at High Temperature (고온에 일면 노출된 콘크리트부재의 손상깊이 평가를 위한 실험적 연구)

  • Lee, Joong-Won;Choi, Kwang-Ho;Hong, Kap-Pyo
    • Journal of the Korea Concrete Institute
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    • v.18 no.3 s.93
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    • pp.431-438
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    • 2006
  • The determination of the depth of deteriorated concrete is one of the main problems in the structural assessment of concrete structures that have been subjected to a fire. This information is particularly important in order to optimize the future operations of repair/strengthening, or in decision-making concerning a possible demolition. The purpose of this study is to propose evaluation technique of damaged depth of concrete exposed at high temperature. In order to evaluate damaged depth of core picked at member under fire, the 24 specimens have been made with variables of concrete strength(20 MPa, 40 MPa, 60 MPa) and heating exposure condition in 600 and 800 for 2 hours. Color change analysis and water absorption after heating have been measured and split tensile stress test was performed to ka the residual compressive strength against the depth of specimen. The results show that the deeper of the depth from heating face, water absorption ratio is smaller and residual stress ratio is larger and the color of heated face is changed to red color. Using this technique at damage evaluation of fired structure, We evaluate damaged depth of member under fire and determine the reasonable strengthening range.

The Relationship between the Mineral Characteristics and Spectral Induced Polarization for the Core Rock Samples from the Gagok Skarn Deposit (가곡 스카른 광상의 암석시료에 대한 광물특성과 광대역 유도분극 반응과의 관련성)

  • Heo, Seo-Young;Oh, Ji-Ho;Yang, Kyoung-Hee;Hwang, Jin-Yeon;Park, Sam-Gyu
    • Economic and Environmental Geology
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    • v.45 no.4
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    • pp.351-363
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    • 2012
  • In order to develop the evaluation techniques for the potential sulfide ore reserves, the relationships between the modal vol.%, grain sizes and textural characteristics of the constituent minerals (e.g., sulfides, oxides and skarn minerals) and the Spectral Induced Polarization (SIP) phase differences are examined for the nine rock cores collected from the Gagok Pb-Zn skarn deposit. The Gagok Pb-Zn skarn deposit occurs mainly along the intrusive contact between the Cretaceous granitic rocks and Cambrian Myobong slate and Pungchon limestone. The nine rock cores have been grouped into three showing distinctive SIP phase differences: the highest (Group I), intermediate (Group II) and lowest (Group III). In relation with the modal vol.% of minerals, Group I is characterized by higher pyrrhotite (25-38 vol.%) and amphibole (40-55 vol.%); Group II by intermediate pyrrhotite (7-13 vol.%) and higher garnet (44-68 vol.%); and lower pyrrhotite (1-7 vol.%) and higher pyroxene (24-66 vol.%) stand for Group III. Furthermore, the grains of all the major constituent minerals become smaller from Group I (<5 mm) through Group II (<2.5 mm) to Group III (<1.6 mm). In particular, the pyrrhotite contents and their grain sizes show logarithmic correlation with the SIP phase differences, Although we present here the results solely from nine samples, the systematic interrelations especially for pyrrhotite indicate the potential ability of SIP measurements as a new mine-evaluation technique for the sulfide ore reservoir.