A metapopulation model with explicit local dynamics is studied. Unlike many patch-based metapopulation models which assume that the local population within each patch is at its equilibrium, our model incorporates population changes in local patches that interact with metapopulation dynamics. The model keeps track of the fractions of patches that have species 1 only, species 2 only, or both spec...

| An adaptive attitude control law is presented that realizes linear closed-loop dynamics in the attitude error vector. The Modiied Rodrigues Parameters (M-RPs) are used as the kinematic variables since they are non-singular for all possible rotations. The desired linear closed-loop dynamics can be of either PD or PID form. Only a crude estimate of the moment of inertia matrix is assumed to be ...

16S ribosomal DNA terminal restriction fragment patterns from rat fecal samples were analyzed to track the dynamics of Lactobacillus acidophilus NCFM and discern bacterial populations that changed during feeding with NCFM. Lactobacillus johnsonii and Ruminococcus flavefaciens were tentatively identified as such bacterial populations. The presence of L. johnsonii was confirmed by isolation from ...

A particle tracking code is developed to solve a general time-fractional diffusion equation (FDE), yielding a Lagrangian framework that can track particle dynamics. Extensive simulations demonstrate the efficiency and flexibility of this simple Langevin approach. Many real problems require a vector FDE with variable parameters and multiscaling spreading rates. For these problems, particle track...

Bioluminescence imaging reveals the long-term dynamics of individual gene expression in a single cell. However, methods for simultaneously imaging multiple gene expression patterns have been unknown to date. Here, we constructed a dual-path optical luminescence imaging system using a two-color reporter system and could simultaneously track two gene expression patterns for several days in a sing...

We track the dynamic response of GaAs quantum-well semiconductor diode lasers after injection of a femtosecond pulse, using ultrafast upconversion. The continuous-wave emission shows gain dynamics and relaxation oscillations on timescales of 1–100 ps. The recirculating femtosecond pulse evolves into an ultrafast ‘‘dark pulse’’ in the wake of subpicosecond oscillations. © 1998 American Institute...

This mini-track focuses on the processes and dynamics relating to the organizational adoption of collaborative systems and technology, and the subsequent diffusion of such systems and technology within adopting organizations. Adoption is the process through which an organization decides to acquire the systems or technology. Diffusion is the process through which the acquired systems and technol...

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Cell biology is being transformed by the use of fluorescent proteins as fusion tags to track protein behaviour in living cells. Here, we discuss the techniques of photobleaching and photoactivation, which can reveal the location and movement of proteins. Widespread applications of these fluorescent-based methods are revealing new aspects of protein dynamics and the biological processes that the...

In this issue of Neuron, Chen et al. (2017) examine premotor activity representing motor planning, Allen et al. (2017) observe the global representation of goal-directed movement on the cortical network, and Makino et al. (2017) track changes in such dynamics throughout learning.