Shearing layers
Shearing layers is a concept coined by architect Frank Duffy , which was later elaborated by Stewart Brand in his book , "How Buildings Learn: What Happens After They're Built" ( Brand , 1994 ) , and refers to buildings as composed of several layers of change . 
<triplet> How Buildings Learn: What Happens After They're Built <subj> Stewart Brand <obj> author <subj> 1994 <obj> publication date