Avira:
See the first article in the journal I mentioned before (vol 129).
(And continue with vols 130-132 for the continuation and the responses.)
דיבור כמעשה – הבעיות ההלכתיות
הכרוכות בהפעלת ‘עוזר אישי’ בשבת
OrangeCountyChapper:
Glad you appreciated it.
See the webpage of the main author of that article (Rav Prof Dror Fixler) for tens of discussions on similar issues.