Reproduction of the source term of the principal components represents a challenge, because of the inherent non-linearity of reaction rates' expressions.
Macrophages appear to be the source of some of the principal mediators of cachexia, such as TNF- α or IL-1 [ 59].
Replacement of petroleum by other energy sources is one of the principal challenges of contemporary engineering.
The Plateau of Tibet is the principal source of the rivers of East, Southeast, and South Asia.
This shelf ice has been the principal source of the ice islands of the Arctic Ocean.
The principal source of the plot was a tale in Giovanni Boccaccio's Decameron.
More important, the South was the Saudi Arabia of cotton — the principal source of the raw material that kept the textile mills of Lancashire humming and their workers employed.
People here apparently do that with some regularity, which city officials describe as the principal source of the problem.
Executives and companies are the principal source of the unlimited checks that are fueling the rise of these outside groups.
It identifies Sharia, or Islamic law, as "the principal source" of the legal system, although in practice Sharia has never been applied rigorously.
