Skilled motor behavior emerges from interactions between efferent neural pathways that induce muscle contraction and feedback systems that report and refine movement. Two broad classes of feedback projections modify motor output, one from the periphery and a second that originates within the central nervous system. The mechanisms through which these pathways influence movement remain poorly und...

Design techniques for time and space optimization of NCL feedback circuits are developed and compared. First, a 3-Register Stage method is employed to circulate DATA and NULL wavefronts required to realize feedback in 4-bit binary timer case-study. While modular and adaptable, this approach requires a significant gate count to realize the feedback circuit that comprises 75% of the total gates r...

The Markov random field (MRF) theory has been accepted as a highly effective framework for designing noise-tolerant nanometer digital VLSI circuits. In MRF-based design, proper feedback lines are used to control noise and keep the circuits in their valid states. However, this methodology has encountered two major problems that have limited the application of highly noise immune MRF-based circui...

In this work we investigate the impact of the receiving end-system performance on data transfer to it via a dedicated optical circuit. Such a situation commonly exists in an e-Science application which may receive data from an optical circuit and process it simultaneously. We illustrate an end-system performance monitoring tool which can deliver the feedback of the receiving end-system performa...

There are many benefits [1] which result from the use of feedback in electronic circuits, but the drawbacks are the increased complexity of the calculations and the opportunity for the resulting circuit to ring or oscillate. This paper employs graphical techniques to simplify stability calculations, thus enabling the designer to achieve a stable, well behaved circuit which meets all reasonable ...

For a system to display bistable behavior (or hysteresis), it is well known that there needs to be a nonlinear component and a feedback mechanism. In the Chua circuit, nonlinearity is supplied by the Chua diode (nonlinear resistor) and in the physical medium, feedback would be inherently present, however, with standard computer models this feedback is omitted. Using Poincaré first return maps, ...

Digital circuits with feedback loops can solve some instances of NP-hard problems by relaxation: the circuit will either oscillate or settle down to a stable state that represents a solution to the problem instance. This approach differs from using hardware accelerators to speed up the execution of deterministic algorithms, as it exploits stabilisation properties of circuits with feedback, and ...

Temporal dynamics in many biomolecular circuits can change with temperature because of the temperature dependence of underlying reaction rate parameters. It is generally unclear what circuit mechanisms can inherently facilitate robustness in the dynamics to variations in temperature. Here, we address this issue using a combination of mathematical models and experimental measurements in a cell-f...