An efficient and/or low complexity sweet-spot manipulation is achieved by an integration of sweet-spot manipulation and multi-channel generation.

A practice club having a friction stir processed sweet spot on the face may enable the golfer to feel whether the ball has been hit by the sweet spot.

The sweet-spot unit focuses a light distribution with a large surface area onto the eyes of the observer by means of a lateral sweet-spot extension, which is greater than or equal to the distance between the eyes of the observer.

The size of the sweet spot reduces the need for tracking precision.

The putter head may also include a distal surface inclining form the distal edge of the sweet spot and a proximal surface inclining from the proximal edge of the sweet spot.

The sweet-spot unit consists of an illumination and imaging matrix.

If the bi have opposite signs, there is no ideal or anti-ideal point but only a saddle point which interpretation is tricky.

A central hole in the device allows the ideal spot for the injection to be marked and identified.

The Current Economic Sweet Spot Is Not the “New Normal

The club face (14) also has a central axis (C) defining a sweet spot (128).

Finding the Sweet Spot for Time-Restricted Feeding

This is the ideal place to spend a few days without a vehicle.

A MALDI mass analysis method is also provided which uses the sweet-spot prediction method.

It is so good we almost want to keep it to ourselves !

With the circular model it is possible to trace isopreference circular lines around the ideal or anti-ideal point.