This paper provides a perspective on the development of ultra-precision technologies: What drove their evolution and what do they now promise for the future as we face the consequences of consumption of the Earth's finite resources? Improved application of measurement is introduced as a major enabler of mass production, and its resultant impact on wealth generation is considered. This paper ide...

Ball-groove contact problems are often encountered in machine design. The analytical modeling of the resulting stress-strain behavior is however difficult, as it implies the necessity to deal with the non-linear Hertzian theory of point contacts. This work addresses the limits of applicability of the available analytical approaches for the calculation of ball-V groove couplings employed in ultr...