William Chadwick

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Mathematical modelling has proven an important tool in elucidating and quantifying mechanisms that govern the age structure and population dynamics of red blood cells (RBCs). Here we synthesise ideas from previous experimental data and the mathematical modelling literature with new data in order to test hypotheses and generate new predictions about these(More)
Understanding genetic relationships amongst the life-history traits of parasites is crucial for testing hypotheses on the evolution of virulence. This study therefore examined variation between parasite isolates (the bacterium Pasteuria ramosa) from the crustacean Daphnia magna. From a single wild-caught infected host we obtained 2 P. ramosa isolates that(More)
Three-quarters of the Earth's volcanic activity is submarine, located mostly along the mid-ocean ridges, with the remainder along intraoceanic arcs and hotspots at depths varying from greater than 4,000 m to near the sea surface. Most observations and sampling of submarine eruptions have been indirect, made from surface vessels or made after the fact. We(More)
For several weeks before each eruption of Mount St. Helens in 1981 and 1982, viscous magma rising in the feeder conduit inflated the lava dome and shoved the crater floor laterally against the immobile crater walls, producing ground cracks and thrust faults. The rates of deformation accelerated before eruptions, and thus it was possible to predict eruptions(More)
  • G Bjornsson, O G Flovenz, +13 authors B Mishra
  • 2002
1407 crobial community is extremely sensitive to temperature, oxygen content, pH, and other environmental variables. It thrives in subsurface zones where the hot hydrother-mal fluid mixes with entrained seawater (13). Changes in crustal fluid temperatures of only a few degrees, or a minor alteration of crustal permeability, can cause the prevailing(More)
  • Dean A. Pinkert, Deanna Tanner Okun, +9 authors Steve Trost
  • 2007
The report Recent Trends in U.S. Services Trade, 2007 Annual Report finds that the services sector is the largest component of the U.S. economy and that the United States is the world's largest market for and exporter of services. Official data on U.S. cross-border services trade in 2005 indicate more substantial growth in both directions than that recorded(More)
Our understanding of submarine volcanic eruptions has improved substantially in the past decade owing to the recent ability to remotely detect such events and to then respond rapidly with synoptic surveys and sampling at the eruption site. But these data are necessarily limited to observations after the event. In contrast, the 1998 eruption of Axial volcano(More)
Deformation of the ground surface at active volcanoes provides information about magma movements at depth. Improved seafloor deformation measurements between 2011 and 2015 documented a fourfold increase in magma supply and confirmed that Axial Seamount's eruptive behavior is inflation-predictable, probably triggered by a critical level of magmatic pressure.(More)
Geophysics program and the NOAA Ocean Exploration Program.We thank the captain and crew of the research vessel T. G. Thompson and the University of Washington for rapidly facilitating the 2005 response effort.We also thank Changes in climate depend essentially on three basic parameters, the amount of incident sunlight, the fraction of this sunlight that is(More)