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| en:shannon:inhalt [2022-09-30 19:02] – Added section on logical machines rainer | en:shannon:inhalt [2024-08-28 10:26] (current) – [Learning Machines] Links to PDFs only rainer |
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| (see also [[wp>Claude_Shannon | Wikipedia]]). | (see also [[wp>Claude_Shannon | Wikipedia]]). |
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| ====== The (Rockefeller) Differntial Analyzer ====== | ==== The (Rockefeller) Differential Analyzer ==== |
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| After his graduation, C.E. Shannon worked for [[wp>Vannevar_Bush| Vannevar Bush]] in the MIT for a mechanical analog computer, called ''Differential Analyzer''. | After his graduation, C.E. Shannon worked for [[wp>Vannevar_Bush| Vannevar Bush]] in the MIT for a mechanical analog computer, called ''Differential Analyzer''. |
| Most sources show pictures of the well-known, pure mechanical version, while there was a second, more advanced machine which was electromechanically controlled, called the [[wp>Rockefeller_Differential_Analyzer| Rockefeller Differential Analyzer]]; a picture is available from the [[https://webmuseum.mit.edu/media.php?module=people&type=popular&kv=6887&media=15|MIT museum]]. It was presumably the most powerful computer at that time and kept secret during the war. Details are in my note with the title {{:shannon:shannon_rda_rg-2012-12-08.pdf|Claude Shannon and "the" Differential Analyzer}}. | Most sources show pictures of the well-known, pure mechanical version, while there was a second, more advanced machine which was electromechanically controlled, called the [[wp>Rockefeller_Differential_Analyzer| Rockefeller Differential Analyzer]]; a picture is available from the [[https://webmuseum.mit.edu/media.php?module=people&type=popular&kv=6887&media=15|MIT museum]]. It was presumably the most powerful computer at that time and kept secret during the war. Details are in my note with the title {{:shannon:shannon_rda_rg-2012-12-08.pdf|Claude Shannon and "the" Differential Analyzer}}. |
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| ====== Logical Machines ====== | ==== Learning Machines ==== |
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| Shannon created the first learning machine, a maze for a mouse, called ''Theseus'', using relays, that has not yet been recreated in same size and speed, although I invested a lot of work in a machine near to the original for the HNF and MIT museum. | Shannon created a first learning machine, a maze for a mouse, called ''Theseus'', using relays, that has not yet been recreated in the same technology and speed. The HNF (Heinz Nixdorf MuseumsForum) has, however, created two functional replicas ([[https://www.hnf.de/dauerausstellung/ausstellungsbereiche/global-digital/mensch-roboter-leben-mit-kuenstlicher-intelligenz-und-robotik/nachbau-theseus.html|HNF's Theseus replica]]) which internally use modern technology, yet behave exacly like the original according to Shannon's film. Leaning takes place in a substantially static environment. |
| | The replicas are shown in the HNF in Paderborn and the MIT Museum in Cambridge, MA. |
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| | A second, even smaller learning machine was developed as a portable variant of Hagelbarger's ''SEER, A SEquence Extrapolating Robot'' and coined the ''Mind Reading Machine'' in his publication, also known as ''Penny Matching Game'' |
| | It learns in the dynamic environment of a game where two opponents change their behaviour while playing. |
| | As a demonstrator for learning, it cannot cheat, but the player may do so. |
| | See {{ :shannon:mindreader_overview.pdf |Overview}} and {{ :shannon:mindreader_variants.pdf | Correcting the Schematics}} |
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| A second one, even smaller, was called the ''Mind Reading Machine''. The electrical schema was published in short article, reprinted in the ''Collected Works''. | |
| I have analyzed in to a large extent and made a microcontroller that simulates the relay circuit, as well as some electro-mechanical test devices. | |
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| Detail will follow here; you may speed up the process if you signal interest, email is rainer@rclab.de. | |
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