Construction of a Spindle Type Svensson Diagonal Slit
The practical working part of the theory of the Svensson method for the direct photography of concentration gradients is presented, along with the design of a special diagonal slit for the accurate ev...
The practical working part of the theory of the Svensson method for the direct photography of concentration gradients is presented, along with the design of a special diagonal slit for the accurate ev...
An Instrument for Studying the Topographies of Fine Textured Surfaces
A profilograph, using a tracing point and optical lever system, makes profiles of fine textured surfaces, magnifying the elevations and depressions by as much as 6000×. With this instrument it i...
A profilograph, using a tracing point and optical lever system, makes profiles of fine textured surfaces, magnifying the elevations and depressions by as much as 6000×. With this instrument it i...
Automatic Integration of Linear Second-Order Differential Equations by Means of Punched Card Machines
Rev. Sci. Instrum. 12, 405 (1941); doi:10.1063/1.1769911
Issue Date: August 1941
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It is shown how punched card machines can be used for solving ordinary linear differential equations of the second order.
Review of Scientific Instruments is copyrighted by The American Institute of Physics.
| History: | Received March 14, 1941 |
| Permalink: |
http://link.aip.org/link/?RSINAK/12/405/1 |
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REFERENCES (3)
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- For a general description of the International Business Machines see: W. J. Eckert, Punched Card Methods in Scientific Computation (The Thomas J. Watson Astronomical Computing Bureau, 1940).
- This extrapolation formula is given by Noumerov (Monthly Notices Roy. Astron. Soc. 84, 592 (1924)) for the differential equations governing planetary motions. But, owing to the non-linearity of these equations, the coefficient Bn in this case cannot be exactly computed beforehand.
- For details see Dr. Eckert, reference 1.
