3 ms·
It's not a passive tag. If you only read 3 sentences into the abstract, you find out that it is an active device. This is repeated at the end of the abstract
by junkcollector 9y ago
It's not a passive tag. If you only read 3 sentences into the abstract, you find out that it is an active device. This is repeated at the end of the abstract and right at the beginning of page 2 in the introduction.