The phrase "a focal position" is correct and usable in written English.
It can be used to describe a central or important role in a particular context, such as in discussions about strategy, design, or focus areas.
Example: "In our new marketing strategy, we aim to place a focal position on customer engagement to drive sales."
Alternatives: "a central role" or "a key position".
A single focal position was used, and its depth was varied with transducer-sample separation to achieve the best lateral resolution at the centre of the sample.
Here, we will also consider run of homozygosity probability ROH i,k,j), where a putative focal position k which is in the middle between two consecutive markers forming a marker bracket, is also assumed to be IBS (with i < k < j).
For CBCMs with small f-numbers, numerical results by the BEM reveal that the designed CBCMs by using the FTM possess better focal performance than the designed CBCMs by using the ZTM, such as a more exact real focal position, a smaller focal spot size, and a higher diffraction efficiency.
Both cases show a shift in focal position towards the laser incidence with rising pulse energy.
Centered on this focal position, a stack of nine images per field distanced by 0.7 μm were acquired in the Z-direction.
When all these effects are being considered, the calculation of the focal position for a certain flap thickness can be performed in a well controlled fashion.
Intuitively, the tensor describes how a small circle [in a two-dimensional (2D) scenario] or sphere [in a three-dimensional (3D) scenario] surrounding the focal position deforms during a given time interval.
In the latter case too, a decompressor appropriate for the focal position is required, owing to the importance of maintaining the device and controlling for oral hygiene.
This means that a precise calculation of the focal position can only be done by taking into account self-focusing effects.
