Edge-Punched Cards for Research Notes

How it was: Paper tapes and punched cards

Perforated paper products As you can imagine, it would be somewhat inconvenient to have a computer that forgot everything it knew if its operator turned it off before stepping out for a bite of lunch. Similarly, imagine a programmer's frustration if, after spending countless hours using a Switch Panel to enter a program, the janitor carelessly disconnected the computer in order to vacuum the of...

The Use of Punched Cards in Molecular Structure Determinations II

I N this article we discuss briefly the evalua­ tion of the intensity and radial distribution functions which are involved in the determina­ tion of the structures of gas molecules by the electron diffraction method.1 Heretofore, these calculations were by far the most time-consuming part of the entire investigation; however, with International Business Machines Corporation equipment and the pu...

The Use of Punched Cards in Molecular Structure Determinations. IV. Approximations to the Temperature Factor

Lecture notes on edge detection

Abstracts of reference papers in the field of edge detection are proposed: (Marr and Hildreth, 1980) and (Perona and Malik, 1990), as well as surveys on edge detection (Ziou and Tabbone, 1998; Basu, 2002) and old forgotten papers (Fram and Deutsch, 1975). Personal remarks are sometimes included.s of reference papers in the field of edge detection are proposed: (Marr and Hildreth, 1980) and (Per...

Pretreatment of Gray Cast Iron for Hard Chromium Electroplating (RESEARCH NOTES)

From the standpoint of processing, hard chromium layer plate may be applied to steels, cast iron, aluminum and nickel base alloys. Cast iron can be plated provided that the surface is capable of conducting the required current and is reasonably free of voids, pits, gross silicate inclusions, and massive segregation. There are many difficulties arising from graphite phase and deposition of hydro...