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- Pritam Ranjan, Ronald D. Haynes, Richard Karsten
- Technometrics
- 2011

For many expensive deterministic computer simulators, the outputs do not have replication error and the desired metamodel (or statistical emulator) is an interpolator of the observed data. Realizations of Gaussian spatial processes (GP) are commonly used to model such simulator outputs. Fitting a GP model to n data points requires the computation of the… (More)

- John Michael Hardman, Wopke van der Werf, Suzanne E. Blatt, Jeffrey L. Franklin, Richard Karsten, Holger Teismann
- Experimental and Applied Acarology
- 2012

Successful biological control of mites is possible under various conditions, and identifying what are the requirements for robust control poses a challenge because interacting factors are involved. Process-based modeling can help to explore these interactions and identify under which conditions biological control is likely, and when not. Here, we present a… (More)

- Richard Karsten, Amanda Swan, Joel Culina
- Philosophical transactions. Series A…
- 2013

Theories of in-stream turbines are adapted to analyse the potential electricity generation and impact of turbine arrays deployed in Minas Passage, Bay of Fundy. Linear momentum actuator disc theory (LMADT) is combined with a theory that calculates the flux through the passage to determine both the turbine power and the impact of rows of turbine fences. For… (More)

- Richard Karsten, Holger Teismann, Angela Vogels
- Theoretical population biology
- 2013

In classical demographic theory, reproductive value and stable age distribution are proportional to the sensitivities of the asymptotic population size to changes in mortality and maternity, respectively. In this note we point out that analogous relationships hold if the maternity function is allowed to depend on the population density. The relevant… (More)

- Justine M. McMillan, Megan J. Lickley, Richard Karsten, Ronald Haynes
- 2008

Large tidal currents exist in the Minas Passage, which connects the Minas Basin to the Bay of Fundy off the north-western coast of Nova Scotia. The strong currents through this deep, narrow channel make it a promising location for the generation of electrical power using in-stream turbines. Using a finite-volume numerical model, the high tidal amplitudes… (More)

- Michael Deveau, Richard Karsten, Holger Teismann
- Acta biotheoretica
- 2015

This discussion paper describes the attempt of an imagined group of non-ecologists ("Modellers") to determine the population growth rate from field data. The Modellers wrestle with the multiple definitions of the growth rate available in the literature and the fact that, in their modelling, it appears to be drastically model-dependent, which seems to throw… (More)

Imagine a group of quantitative scientists, such as statisticians or mathematicians, with only a textbook knowledge of ecology, who are charged with analyzing a dataset of population counts. Let us call these scientists the “Modellers”. The Modellers feel that if their analysis is to be relevant to ecologists, it should relate to what they understand to be… (More)

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