• Title/Summary/Keyword: The Quaternary

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MVL Data Converters Using Neuron MOS Down Literal Circuit (뉴런모스 다운리터럴 회로를 이용한 다치논리용 데이터 변환기)

  • Han, Sung-Il;Na, Gi-Soo;Choi, Young-Hee;Kim, Heung-Soo
    • Journal of IKEEE
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    • v.7 no.2 s.13
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    • pp.135-143
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    • 2003

  • This paper describes the design techniques of the data converters for Multiple-Valued Logic(MVL). A 3.3V low power 4 digit CMOS analog to quaternary converter (AQC) and quaternary to analog converter (QAC) mainly designed with the neuron MOS down literal circuit block has been introduced. The neuron MOS down literal architecture allows the designed AQC and QAC to accept analog and 4 level voltage inputs, and enables the proposed circuits to have the multi-threshold properity. Low power consumption of the AQC and QAC are achieved by utilizing the proposed architecture.

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Late Quaternary (Late Pleistocene and Holocene) Stratigraphy and Unconformity in the Kimpo Tidal Deposits, Kyunggi Bay, West Coast of Korea (경기만 김포 조간대 지층의 제 4기 후기 층서)

  • 박용안;최경식;도성재;오재호
    • The Korean Journal of Quaternary Research
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    • v.13 no.1
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    • pp.79-89
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    • 1999

  • Three deep borings to obtain vertical continuous samples including weathered basement soils (KP-1, KP-2 and KP-3) were carried out in the reclaimed Kimpo tidal flat with purposes to establish late Quaternary stratigraphy. On the basis of detailed observations and descriptions on color, sedimentary structure and textural composition of cored sediments, four lithostratigraphic units are classified. From the stratigraphic top to bottom, they are Holocene tidal sand and muddy deposit (Unit I), early Holocene freshwater marsh muddy deposit (Unit II), late Pleistocene tidal sand and muddy deposit (Unit III) and late Pleistocene basal fluvial gravel deposit (Unit IV). In particular, Unit III is divided into two parts: the upper part-weathered and cryoturbated part during the Last Glacial Maximum (Unit III-a) and the lower part-unweathered tidal sand and muddy deposit (Unit III-b).

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