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Example of a set of 53 edged-notched cards used by Gordon Bell to gather information for a book (Computer History Museum) Example of a blank pre-printed edge-notched card designed to store bird population research data (Smithsonian) Example of a commercially-produced notched card reference database, the Isotope Datadex (1961-1970)
A study by the University of Cincinnati found 20 to 40 percent of Americans will provide an opinion when they do not have one because of social pressure, using context clues to select an answer they believe will please the questioner. A classic example of this phenomenon was the 1947 study of the fictional Metallic Metals Act. [2]
Alternatively, the results may be reported as energy lost per unit cross-sectional area at the notch (J/m 2 or ft·lb/in 2). In Europe, ISO 180 methods are used and results are based only on the cross-sectional area at the notch (J/m 2). The dimensions of a standard specimen for ASTM D256 are 63.5 × 12.7 × 3.2 mm (2.5 × 0.5 × 0.125 in).
The oldest tally sticks date to between 35,000 and 25,000 years ago, in the form of notched bones found in the context of the European Aurignacian to Gravettian and in Africa's Late Stone Age. The so-called Wolf bone is a prehistoric artifact discovered in 1937 in Czechoslovakia during excavations at Dolní Věstonice , Moravia , led by Karl ...
The stick is notched and inscribed to record a debt owed to the rural dean of Preston Candover, Hampshire, of a tithe of 20d each on 32 sheep, amounting to a total sum of £2 13s. 4d. A tally stick (or simply a tally [ 1 ] ) was an ancient memory aid used to record and document numbers, quantities, and messages.
Traces is a Python library for analysis of unevenly spaced time series in their unaltered form.; CRAN Task View: Time Series Analysis is a list describing many R (programming language) packages dealing with both unevenly (or irregularly) and evenly spaced time series and many related aspects, including uncertainty.
Charpy test sample with a notch In mechanical engineering and materials science , a notch refers to a V-shaped, U-shaped, or semi-circular defect deliberately introduced into a planar material. In structural components, a notch causes a stress concentration which can result in the initiation and growth of fatigue cracks.
1940s flexural test machinery working on a sample of concrete Test fixture on universal testing machine for three-point flex test. The three-point bending flexural test provides values for the modulus of elasticity in bending, flexural stress, flexural strain and the flexural stress–strain response of the material.