In a paper about Photo-Electrically Controlled Lighting Systems by Francis Rubinstein et. al. (a native English speaker as far as I know) I've come across some wording that seems incorrect to me. The word
task is used multiple times in a context where at other times
task surface is used.
Examples for the usage of
task surface in 3 different places in the paper:
The ability of a photo-electrically controlled lighting system to maintain a constant total light level on a task surface by responding to changing day light levels (...)
The first constraint is particularly important because the control objective is expressed in terms of the illuminance at the task surface (or work plane).
(...) the control photo sensor is generally mounted in the ceiling rather than at the task surface, (...)
Examples fo the usage of
task in 5 different places in the paper:
We describe the major components (...), and derive expressions for each algorithm that express the total illuminance at the task as a function of the control photo sensor signal.
We then use experimental data from scale models to demonstrate how the control algorithm and the photo sensor's geometry and location affect the ability of photo-electrically lighting systems to provide a specified illuminance level at the task.
Although placing the photo sensor at the task would be ideal from an operational standpoint (...)
For example, a ceiling-mounted photo sensor doesn't directly measure the illuminance at the task.
By expressing each algorithm mathematically, we can derive expressions for the total light level at the task as a function of the daylight component of the photosensor signal and daylight on the task for each algorithm.
task surface should be used instead of
task in the examples above. At least that's how I understand it. Using the word
task on its own in those cases sounds incorrect to me but I'm no native speaker.
Is the usage of
task on its own correct in the 5 examples above and if yes why? Can the word
task on its own be used as a reference to a physical place?
It just seems odd to me when one speaks of a
task having a light level or illuminance or placing a sensor at a