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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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Wargaming when War is not the Answer: Multipurpose collective conflict resolution games.
Abstract not provided.
Costs of symmetric strategic games with defenses
A companion note discusses the crisis stability of symmetric offensive missile forces. This note extends the analysis to include symmetric defensive forces. It derives Nash equilibrium optimal missile defenses, which are used to study the impact of varying defenses on strike costs and stability. It treats the option to strike first as a random decision by nature, which is consistent with previous experience and provides a rational basis for interaction and deterrence without which the study of stability is vacuous.
Stochastic Bayesian Games for the Cybersecurity of Critical Infrastructures.
Abstract not provided.
Leveraging 3D Game Engines for High-Quality Synthetic Data in Object Detection Applications
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Classification in Gaming: A Panel
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Theoretical Themes for Complex Games with Simple Toys
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Solar@Scale: Improving the Local Rules of the Game for Large Scale Solar
This final report summarizes the Solar@Scale Project including project goals, milestones, tasks and deliverables. Solar@Scale, led by ICMA in partnership with the American Planning Association, took place from 2020-2025. The initiative addressed large-scale solar soft costs by developing tools and resources related to planning, siting, permitting and inspection in support of local governments, special districts, and other authorities that have jurisdiction over large-scale solar projects.
Game-Theoretic Approaches to Security Risk: Challenges & Opportunities
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Differential games, dynamic optimization, and generalized control theory
Generalized control theory, discussing criterion function, pareto-optimal set determination, information structure, etc
On behavior strategy solutions in two-person zero-sum finite extended games with imperfect information. I - A method for determination of minimally complex behavior strategy solutions.
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N-Player Stochastic Differential Games
Conditions are described which guarantee that the control strategies adopted by N players constitute an efficient solution, an equilibrium, or a core solution. The system dynamics are described by an Ito equation, and all players have perfect information. It was found that when the set of instantaneous joint costs and velocity vectors is convex, the conditions are necessary.
A differential game solution to the Coplanar tail-chase aerial combat problem
Numerical results obtained in a simplified version of the one on one aerial combat problem are presented. The primary aim of the data is to specify the roles of pursuer and evader as functions of the relative geometry and of the significant physical parameters of the problem. Numerical results are given in a case in which the slower aircraft is more maneuverable than the faster aircraft. A third order dynamic model of the relative motion is described, for which the state variables are relative range, bearing, and heading. The ranges at termination are arbitary in the present version of the problem, so the weapon systems of both aircraft can be visualized as forward firing high velocity weapons, which must be aimed at the tail pipe of the evader. It was found that, for the great majority of the ralative geometries, each aircraft can evade the weapon system of the other.
Uncertain dynamical systems: A differential game approach
A class of dynamical systems in a conflict situation is formulated and discussed, and the formulation is applied to the study of an important class of systems in the presence of uncertainty. The uncertainty is deterministic and the only assumption is that its value belongs to a known compact set. Asymptotic stability is fully discussed with application to variable structure and model reference control systems.
N-player stochastic differential games
The paper presents conditions which guarantee that the control strategies adopted by N players constitute an efficient solution, an equilibrium, or a core solution. The system dynamics are described by an Ito equation, and all players have perfect information. When the set of instantaneous joint costs and velocity vectors is convex, the conditions are necessary.
Optically thick X-ray transfer - The shell game
This paper investigates the radiative transfer of X-rays through a shell that is optically thick to Compton scattering, surrounding a point source of continuum X-rays. The emission and absorption of X-rays due to K-shell transitions of iron are included. The calculations are done in two entirely independent ways: by Monte Carlo simulation and by solving a Fokker-Planck diffusion equation. The emergent spectra agree very well for Thomson depths of at least about 2. The validity is confirmed of the modification to the Fokker-Planck equation of Kompaneets (1957) that is required when the photon energy is large compared with the average thermal energy of the electrons. A procedure is also developed for treating models of compact X-ray sources consisting of incomplete shells.
An experiment proposed and set up by the readers will be flying on board the Shuttle; these are the rules of the game; the experiments of others
The 400th round trip ticket to space via the space shuttle is booked in the name of an Italian journal. Students from that country are offered an opportunity to propose an experiment for NASA's Get Away Special program. The dimensional characteristics of the container, as specified by NASA, are given as well as limitations of weight, volume, diameter, and height for the experiment. The types of experiments in the OSS-1 payload and their operation are described.