Publications
Showing 127 results for Author: James J. Nutaro
Mar, 2026
Conference Paper
Towards a theory of economic value for modeling and simulation: incremental cost of parallel simulation (wip)
A useful perspective on the economic value of simulation in engineering comes from considering the role simulation plays in constructing a system. We propose a conceptual model that combines an embryonic concept of the value of an information bit with cost estimation tools used in software engineering. The model provides an economic justification for the common conception…
Mar, 2026
Conference Paper
SIMULATION CLONING FOR DIGITAL TWINS: A SCALABLE APPROACH
Digital Twin (DT) methods represent an important technology in which a simulated model of the operations of a physical system uses real-time sensor data to simulate, monitor, and consequently, improve its operations. One of the primary objectives of such a DT is to inform the physical system of measures to be taken in response to one or multiple intervening events that can…
Jul, 2025
Journal
Discrete event cellular automata: A new approach to cellular automata for computational material science
We explore the computational advantages of discrete event simulation for cellular automata models of grain growth. These benefits include a reduction in execution time by up to an order of magnitude and the elimination of numerical errors that stem from overshooting grain capture events and approximating a Poisson process with a Bernoulli process. The fundamental mechanism…
Jun, 2025
Journal
SpecSims: A Scalable Speculative Tree-based Simulation Cloning Framework For Finite Memory Machines
Simulation cloning is a technique in which cloned simulations whose state spaces differ partially from their parent simulation due to intervening events are spawned at runtime and concurrently advanced. It is a powerful method to carry out what-if analysis by speculatively exploring and evaluating the impact of various permutations of intervening cascade of events. Due to…
Jun, 2025
Journal
Inferring Reliability Model Parameters from Expert Opinion
We propose a method for constructing bathtub models of reliability from opinion. The method is intended for reliability studies early in the design and prototyping of a new system, before data concerning reliability has become available. A stylized bathtub curve is presented for soliciting best engineering judgement from technical experts. By pooling these stylized curves,…
Jul, 2024
Journal
DECA: Discrete Event inspired Cellular Automata for grain structure prediction in additive manufacturing
Microstructure largely dictates macroscopic material properties and is strongly affected by processing. Therefore, the simulation of microstructure evolution in response to thermal fields during processing is of significant interest within the computational materials science community. Additive manufacturing (AM) has emerged as a technique for producing complex geometries…
Apr, 2024
Conference Paper
Operational impacts of high penetration solar power on a real-world distribution feeder
Higher penetration of solar photovoltaic (PV), with their uncontrollable generation variability, imposes various grid stability challenges on distribution system operation. The primary problem is significant voltage rise in the distribution feeder that forces existing voltage control devices such as on-load tap-changers and line voltage regulators to operate more frequentl…