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Extra resources for Gauss and the history of the fast fourier transform
In bipolar technology the objective piece is placed on an anvil or hard surface and struck from above with a hard hammer (Goodyear 1993), and the fracture is often initiated from the anvil end as well as the hammer end. As such, bipolar flakes may appear to have two points of applied force. Bipolar technology is often used when the objective piece is too small to be reduced by hand-held methods or when the tool maker is trying to maximize the use of a limited raw-material source (Andrefsky 1994b).
Flintknapping or flintworking techniques used by primitive stone tool makers and users produced the lithic artifact 7 8 LITHICS: MACROSCOPIC APPROACHES TO ANALYSIS assemblages excavated by archaeologists. To understand the place of replication analysis within the larger field of lithic analysis it is worthwhile to review briefly the history of flintknapping and the replication of stone tools. Until recently there have been few modern-day flintknappers, and most were making gunflints and not replicas of aboriginal stone tools (Skertchly 1879).
The actual mechanics of chipping an objective piece into a preconceived form require the convergence of multiple interrelated variables. Among others, these variables include: size and shape of objective piece; density of objective piece; size, weight, shape, and density of hammer; type, angle, and location of load application; underlying support of objective piece; shape, size, and isolation of striking platform; and flaws in the objective piece. These variables are played against one another by the tool maker depending upon the particular presentation of the objective piece and desired shape of the detached piece.