Complex sentence: To estimate energy expenditure from these gases, several scientific endeavors have resulted in useful algorithms, one of the most famous and widely used coming in 1949 from Scottland's University of Glasgow by research physiologist J. B. de V. Weir.
Split into simpler sentences: To estimate energy expenditure from these gases, several scientific endeavors have resulted in useful algorithms. One of the most widely used was developed in 1949 at University of Glasgow by research physiologist J. B. de V. Weir.