95 percent air, the hidden mass in the WTC, stumps demolition delusion goals. For 911 truth, the demolition delusion continues to fuel failed efforts to back in failed claim of explosives, silent ones at that. The OP "paper" is an example.
The big question, why are 911 truth papers conclusion free? Absent of goals? When I see "papers" like this and other failed 911 truth work inspried by the fantasy of demolition, what are the reasons no evidence of explosives were found? The big hole in the fantasy, and the reason these papers avoid directly addressing the real goal, the want-to-be conclusion of demoltion, hoping to find enough woo to convice the gulillible there is a vast conspracy.
In this case the "model" is limited, glosses over the hard to explain parts of the WTC collapse. Implications of woo appear when an object is ejected, or air escapes. Why are papers like the OP myopic? Why are idiotic claims of patterns made? Are patterns a step to back in the inside job?
Why are photos presented confirming a gravity collapse?
The "papers" from 911 truth make blanket statements, but don't deliver.
allow us to understand the probable mechanism by which the tower collapsed.
What is it? Demolition? The old silent explosive, no blast damage super duper quiet no-blast explosives? But more important, the introductions of 911 truth papers don't explain study of the collapse will not explaining what caused the collapse, which is the true goal of the "papers", but only to back in failed claims.
... it is concluded that the portion of the flooring that holds the perimeter to the core must have been stripped or eroded as debris initially descended to the ground, leaving much of the core standing and the perimeter unsupported.
There is a lot missing.
the temporary survival of the entire northern portion of the core
Why was the survival of a portion (there was no entire) of the core temporary?
When will the demolition delusion stop fueling new studies to back in failed claims? May 2011? 9112011? What is the next attempt going to look like? This is the 911 CT sub forum, and this paper fits, fueled by the need to have a CT conclusion. Cool.