Network motifs and their origins

Ophiolites and Their Origins

Ophiolites are the remnants of ancient oceanic crust and upper mantle that were tectonically emplaced into continental margins. They display the only evidence for magmatic, tectonic, and hydrothermal processes associated with seafl oor spreading prior to 170 Ma because no oceanic lithosphere older than this age is preserved in the modern oceans. The occurrence of sheeted dikes, side-byside tabu...

Network Motifs and E. coli

Network motifs are small connected subnetworks within a larger network that occur in statistically significant quantities and may indicate functional regions of the network. Network motif software tools employ algorithms that compare a network to randomly generated networks in order to identify subnetworks that occur in frequencies higher than would be expected by random chance. The transcripti...

SnapShot: Network Motifs

Dynamics of network motifs

A biased distribution of local network structures, or network motifs, has been widely observed but remains poorly understood. By comprehensively studying their dynamics, we show that some network motifs are fundamentally more versatile—capable of executing a variety of tasks—than others. We calculate the value of a motif by comparing its versatility to its range of possible update rules. Our wo...

NORM sources and their origins.

Naturally Occurring Radioactive Materials, often referred to by the acronym NORM, are and always have been a part of our world. Our planet and its atmosphere contain many different naturally occurring radioactive species, and it and virtually everything, living or inanimate, contains NORM. In the history of mankind, knowledge of the existence of radioactivity is very recent, even when considere...