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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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reVeal (the reV Extension for Analyzing Large Loads) is an open-source geospatial software package for modeling the site-suitability and spatial patterns of deployment of large sources of electricity demand under future scenarios. reVeal is part of the reV ecosystem of tools [https://nrel.github.io/reV/#rev-ecosystem].
Until recently, SUMO users could not model the behavior of a ring-and-barrier traffic signal via existing signal types, which left North American SUMO users without the direct ability to capture traffic dynamics of their local networks. This work presents the methods, implementation overview, and validation of a 'dual-ring' NEMA style traffic controller which has recently been added to the main SUMO code base. A brief explanation of the 'dual-ring' implementation is also provided as context for those new to this type of traffic controller. The foundation for this work was presented at the SUMO User Conference 2021 by researchers at the US Department of Energy's National Renewable Energy Laboratory, but was not integrated into SUMO code base at the time. Following the initial inclusion of the controller to SUMO, the authors began validation of the SUMO controller against an Econolite software-in-the-loop (SIL) traffic signal controller configured with actual setup parameters from controllers in a real-world three-intersection corridor in Tuscaloosa, Alabama, USA. This paper documents the process of adding new features to the controller code as well as validating their implementation through simulation-based and automated grey-box testing is presented in this paper. Key features such as fully-actuated operation, various timing offset plans, proper next-phase fit algorithms and more, have been added and validated against this SIL system. Though not an exhaustive demonstration of features, this work is intended make more users aware of this extension of SUMO capabilities.
Enzymes enable life by accelerating reaction rates to biological timescales. Conventional studies have focused on identifying the residues that have a direct involvement in an enzymatic reaction, but these so-called ‘catalytic residues’ are embedded in extensive interaction networks. Although fundamental to our understanding of enzyme function, evolution, and engineering, the properties of these networks have yet to be quantitatively and systematically explored. We dissected an interaction network of five residues in the active site of Escherichia coli alkaline phosphatase. Analysis of the complex catalytic interdependence of specific residues identified three energetically independent but structurally interconnected functional units with distinct modes of cooperativity. From an evolutionary perspective, this network is orders of magnitude more probable to arise than a fully cooperative network. From a functional perspective, new catalytic insights emerge. Further, such comprehensive energetic characterization will be necessary to benchmark the algorithms required to rationally engineer highly efficient enzymes.
Differential inequalities and extension of lyapunov method
Static stability of square and circular planform reentry vehicles at mach 3.11 - effects of controls and leading-edge extensions
Effects of wing-crank, leading-edge chord extensions & horizontal-tail height on longitudinal stability of swept-wing models
Extension of chapman-ferraro theory of geomagnetic storms
Extension of control function to neighborhood of reference trajectory to obtain feedback control
Meteorological effects in relation to frequency of extensive air showers near sea level
Temporal distribution of extensive air showers of cosmic rays
Approximation theory for calculation of linearized subsonic and supersonic flow around pulsating bodies of low aspect ratio - extension of Oswatitsch equivalence rule to unsteady flow
Group extensions of Poincare group and application to relativistic SU/6/ symmetry in high energy interactions
Extension of Green theorem approach to higher dimensions for determination of optimality of totally singular vector control
Functional extension of human hands through remote control machine
Extension of photospheric magnetic field into interplanetary space
Torques, gravity-gradient force, and Coulomb drag due to electrodynamic interactions calculated for 750-foot extensible boom antenna for Radio Astronomy Explorer
Extensions of momentum transfer theorem
Popov theorem extensions for stability of nonlinear control systems