Ornithologists survey marine birds to determine patterns of distribution and abundance, and to estimate the size of their populations (Spear et al. 1995, Hunt et al. 1996a). Additionally, wildlife biologists survey beach-cast seabirds systematically, and whenever large die-offs occur (Stenzel et al. 1988, Piatt et al. 1990, Piatt & Van Pelt 1997). Estimating baseline mortality rates is particul...

After the introduction of mercury into the process of hat making in the seventeenth century it became a notoriously dangerous occupation, especially in France, where mercury was first used. Mercurial poisoning became so common among the hatters in Victorian Britain that it is widely supposed that Lewis Carroll had the condition in mind when he invented the character of the Mad Hatter in Alice's...

One of the key challenges in changepoint analysis is the ability to detect multiple changes within a given time series or sequence. The changepoint package has been developed to provide users with a choice of multiple changepoint search methods to use in conjunction with a given changepoint method and in particular provides an implementation of the recently proposed PELT algorithm. This article...

Neurons recorded from electrode arrays show a remarkable scaling property in their bursts of spontaneous activity, referred to as "avalanches" (Beggs and Plenz, 2003, 2004). Such scaling suggests a critical property in the coupling of these circuits. We show that similar scaling laws can arise in a simple model for the growth of neuronal processes. In the model (Van Ooyen and Van Pelt, 1994, 19...