| http://www.w3.org/ns/prov#value | - An alternative operation to avoid this issue is to widen the beam, such as for example shown in FIGS. 3A and 3B. However, an issue created by this alternative is that while acoustic beam 50 imparts energy to cantilever 52, it will also generate undesirable reflected acoustic signals 54 which can cause strongly varying forces on the cantilever for very small changes in the spacing between the canti
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