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AbstractThis paper seeks to assess the growth potential of new high-technology incubated ventures through analyses of the entrepreneurial characteristics of their founders. The following two objectives are pursued: (1) to provide managers with insights regarding how the success potential of a venture could be increased, and (2) to provide a deeper understanding of how a start-up business could be nurtured on the basis of knowledge concerning the historical origins of incubation. The findings suggest that the following characteristics of the founder significantly influence the success potential of an incubated venture: entrepreneurial personality, motivation for starting the venture, managerial skills, and approach towards innovation.

Experimental studies have been conducted with driven rotary tools on various work materials, using specially constructed test rigs. The studies include the effect of rotary speed on the geometry, the kinematics and the mechanics of chip formation. The data are analyzed, using the concept of equivalent angle of obliquity. Hitherto unknown and extraordinary effects on the chip formation have been noted which lead to new modes of rotary machining and the expansion of the scope of rotary machining.

The steps by which a tool life analysis applicable to orthogonal cutting can be extended to accommodate tool obliquity are detailed. By following these, a relation between tool-life, T, tool obliquity, λ, and a representative tool flank wear land contact temperature, θfs, is obtained. A method is then described by which θfs in oblique cutting can be computed. This is based on a recently developed procedure for estimating temperatures of obliquely moving heat sources on the rake face combined with the influence of constriction resistance occurring at the discrete contact points within the flank contact area. In this way, from a knowledge of the T − θfs relation applicable to a given tool/workpiece combination cut orthogonally, tool lives at different tool obliquities are predicted and are shown to agree quite well with experimentally determined values. Finally, a comprehensive tool life expression independent of cutting parameters and of tool geometry is proposed and is verified using data obtained by cutting mild steel with H.S.S. tools.