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Although the direct effects of climate change on species distribution and abundance have become increasingly apparent, considerably less is known about the potential for thermal variations to influence community structure indirectly through altered species interactions. We examined how the low tide body temperature of the rocky intertidal sea star Pisaster(More)
—This paper describes the design of an agent-based modeling framework for high performance computing. Rather than a collection of methods that require parallel programming expertise the framework presented allows modelers to concentrate on the model while the framework handles the efficient execution of simulations. The framework uses a state machine based(More)
Many of the complex systems found in biology are comprised of numerous components, where interactions between individual agents result in the emergence of structures and function, typically in a highly dynamic manner. Often these entities have limited lifetimes but their interactions both with each other and their environment can have profound biological(More)
The locations of the instantaneous axes of rotation for the cervical motion segments C2-3 to C6-7 were determined from flexion-extension radiographs of 40 normal subjects using a modified overlay technique. The biological variation of the instantaneous axes of rotation was small, as was the technical error associated with the technique used. The data(More)
The reliability of a modified protocol for plotting the instantaneous axes of sagittal rotation for the cervical spine was evaluated by measuring the observer differences when the process was performed separately by two observers, and by a single observer, on two separate occasions. Small observer differences were found both for individual steps in the(More)
The reliability of the conventional technique for determining the instantaneous axes of rotation of the cervical motion segments was evaluated by comparing the determinations made by two observers and the same observer on two separate occasions. Different observers found the same mean location for the instantaneous axis at each segment in a test population(More)
Huestis and Cone reported in [J. Anal. Toxicol. 22 (1998) 445] that serial monitoring of D 9-THC-COOH/creatinine ratios in paired urine specimens collected at least 24 h apart could differentiate new drug use from residual D 9-THC-COOH excretion following acute marijuana use in a controlled setting. The best accuracy (85.4%) for predicting new marijuana use(More)
High performance computing is essential for simulating complex problems using agent-based modelling (ABM). Researchers are hindered by complexities of porting models on parallel platforms and time taken to run large simulations on a single machine. This paper presents FLAME framework, the only supercomputing framework which automatically produces(More)
Recent work demonstrates that nearshore oceanography can generate strong variation in the delivery of resources (nutrients and larvae) to benthic marine communities over spatial scales of tens to hundreds of kilometers. Moreover, variation in the strength of these bottom-up inputs is often spatially consistent, linked to regional centers of upwelling,(More)