know A from B means distinguish A from B. But what does intransitive know from mean? I looked it up in several dictionaries to no avail.
Not only architects are researching architectural subjects. A lot of researchers come from other disciplines with different research cultures. Hence, research approaches as well as research achievements are different. They are published in journals of each discipline, often not knowing from each other; some are not even published, as they were done in offices and not labeled as research.
Research Culture in Architecture: Cross-Disciplinary Collaboration