Changeset 94 in t29-www


Ignore:
Timestamp:
Jul 5, 2009, 2:12:33 AM (15 years ago)
Author:
sven
Message:
  • updated translation
Location:
en/computer
Files:
2 edited

Legend:

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  • en/computer/storage-media.shtm

    r31 r94  
    3333      <br/>The problem of storing information is of central importance for digital computers and was a difficult area during the early days of computing. In these times building a fast processor was considerably more easy than building an equally fast and large memory system for this processor. This led to some rather arcane solutions which are completely extinct today.
    3434    </p>
     35    <p>
     36      Nowadays as well as 50 years ago, these characteristical attributes are important:
     37    </p>
     38
     39    <ul>
     40           <li>cycle time</li>
     41           <li>packing density</li>
     42           <li>costs / bit</li>
     43           <li>(thermal) power loss</li>
     44    </ul>
     45    <p>Storages are classified geometrically:</p>
     46    <ul>
     47           <li>one-dimensional alignment (e.g. the delay line memory)</li>
     48           <li>two-dimensional alignment (e.g. drom storage, disk storage)</li>
     49           <li>three-dimensional alignment (e.g. core memory, the number of layers is the word length)</li>
     50    </ul>
     51    <p>These physical principles has been used: electrostatic charge (storage tube),
     52       propagation of acoustic waves (delay line memories), ferromagnetism (core memory,
     53       plated wire memory, drum/disk memory), holography (optical memories). The most important
     54       and most spread memories are the ferromagnetic memories.</p>
    3555
    3656    <div class="box center">
  • en/computer/univac9400.shtm

    r56 r94  
    198198         UNIVAC 9400 = 470 cars (Volkswagen beatle)</a></p>
    199199
    200       <!-- Absatz hinzugekommen zu v5.8... -->
    201       <p><small>We would like to thank Dr. J&uuml;rgen Steen from the
    202          <a href="http://www.historisches-museum.frankfurt.de/">Historical
    203          Museum Frankfurt</a> for lending several UNIVAC boards. Reparations
    204          are quite difficult without comparative boards.</small></p>
     200      <!-- Absatz hinzugekommen/zuletzt geaendert 05.07.09 -->
     201      <div class="box right">
     202         <a href="http://www.unisys.com/"><img src="/shared/photos/rechnertechnik/unisys_tag.gif"  width="142" height="75" /></a>
     203         <p class="bildtext"><small>We would like to thank to the UNISYS
     204            Corporation for funding all trucking of the big machines.
     205            We would also like to thank Dr. J&uuml;rgen Steen from the
     206            <a href="http://www.historisches-museum.frankfurt.de/">Historical
     207            Museum Frankfurt</a> for lending several UNIVAC boards. Reparations
     208            are quite difficult without comparative boards.</small></p>
     209      </div>
    205210
    206211
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