Is Eastern Hardwood Sawtimber Becoming Scarcer?

Survival of the scarcer.

We investigate extinction dynamics in the paradigmatic model of two competing species A and B that reproduce (A→2A, B→2B), self-regulate by annihilation (2A→0, 2B→0), and compete (A+B→A, A+B→B). For a finite system that is in the well-mixed limit, a quasistationary state arises which describes coexistence of the two species. Because of discrete noise, both species eventually become extinct in t...

Is HIV becoming more virulent?

Survival of the Scarcer in Space

Recently a model of intraand interspecific competition between two species was proposed [Phys. Rev. E 87 (2013) 010101], in which the scarcer species (i.e., with smaller stationary population size) can be more resistant to extinction when it holds a competitive advantage. Here we verify this survival of the scarcer in space (SSS) phenomenon in models with spatial structure, both analytically an...

Is the neurologic examination becoming obsolete?

Si Chin is a Consultant Neurologist at Camden Medical Centre. He is Visiting Consultant to the National Neuroscience Institute at Tan Tock Seng Hospital, the Singapore General Hospital and the National Eye Centre. He is also an Adjunct Associate Professor in the Department of Medicine, National University of Singapore; and a member of the Specialist Training Committee (Neurology). C l i n i c a...

Is a Competent Civil Service Becoming Oxymoronic?