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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>SELF-CHECKING MULTIPROCESSOR MODULE FOR TRAIN CONTROL APPLICATIONS</title>
      <link>https://trid.trb.org/View/173939</link>
      <description><![CDATA[The need for a reliable, and as near as possbile fail-safe, mulitprocessing system for on-board automatic train operation has resulted in the development of Cyclone I. Time redundancy techniques are used extensively to reduce hardware to a minimum, and to allow no incorrect output conditions arising from transient faults.]]></description>
      <pubDate>Tue, 30 Mar 1982 00:00:00 GMT</pubDate>
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      <title>AN EFFECTIVE STRESS MODEL FOR LIQUEFACTION</title>
      <link>https://trid.trb.org/View/59970</link>
      <description><![CDATA[The important factors affecting the dynamic response of saturated sand layers to earthquake motions are: (1) The initial shear modulus in situ; (2) the variation of shear modulus with shear strain; (3) contemporaneous generation and dissipation of pore-water pressures; (4) changes in effective mean normal stress; (5) damping; and (6) hardening.  Constitutive ralations are formulated that take all these factors into account and these are incorporated into a nonlinear method for the dynamic effective stress analysis of saturated sands.  The method predicts the phenomenological features of the dynamic response of saturated sand layers that commonly occur as the pore-water pressure rises in the sand during earthquake shaking.  It allows the distribution of pore-water pressure and the effects that drainage and internal flow have on the location and time of liquefaction to be determined quantitatively. /Author/]]></description>
      <pubDate>Tue, 07 Mar 1978 00:00:00 GMT</pubDate>
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