By Kirsten Conover Perception sometimes overrides the reality of a situation, especially within the realm of golf course maintenance. Green speed is an example of this phenomenon within golf. An example outside of golf is the idea that golf courses are bad for the environment and are major abusers of fertilizer and water. This perception is a stubborn idea that continues to persist despite data...

Simulation of the dynamics of biomolecules requires the use of a time step in the range 0.5–1 fs to obtain acceptable accuracy. Nevertheless, the bulk of the CPU time is spent computing interactions, such as those due to long-range electrostatics, which vary hardly at all from one time step to the next. This unnecessary computation is dramatically reduced with the use of multiple time stepping ...

We introduce a new mathematical method for tracking position and orientation. The method, which is applicable to a wide variety of virtual-environment tracking systems, offers several advantages: (1) significantly improved estimate rates and latencies; (2) improved accuracy; (3) a flexible framework for heterogeneous multi-sensor data fusion; and (4) a unique opportunity to perform simultaneous...

Striatal enriched tyrosine phosphatase (STEP) has recently been identified as a crucial player in the regulation of synaptic function. It is restricted to neurons within the CNS and acts by downregulating the activity of MAP kinases, the tyrosine kinase Fyn and NMDA receptors. By modulating these substrates, STEP acts on several parallel pathways that impact upon the progression of synaptic pla...

Based on a natural approach for the time discretization of gradient flows a new time discretization for discrete Willmore flow of polygonal curves and triangulated surfaces is proposed. The approach is variational and takes into account an approximation of the L-distance between the surface at the current time step and the unknown surface at the new time step as well as a fully implicity approx...

In this paper, we consider an  i.e., multiple step-stress accelerated life testing (ALT) experiment with unequal duration of time . It is assumed that the time to failure of a product follows Rayleigh distribution with a log-linear relationship between stress and lifetime and also we assume a generalized Khamis-Higgins model for the effect of changing stress levels. Taking into account that the...