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Developing a Multilingual Auto-coding Interface Control for the MAVERIC-II Dynamics Simulator
Simulation model development in certain high-level languages such as Python, MATLAB, or Simulink are unparalleled by their convenience and rapid turnover time. However, legacy simulation engines often depend on more traditional languages such as FORTRAN or C/C++. The NASA Marshall Aerospace Vehicle Representation in C version II (MAVERIC-II) is a modular, legacy-derived computer program used for high-fidelity, 6 degree-of-freedom (6DOF) simulation for aerospace vehicle flights and analyses of guidance and control performance with built-in mathematical modeling of environmental effects such as wind, atmosphere, and gravity as well as dispersion capability for Monte Carlo analysis. MAVERIC-II is modular in the sense that each component software element of the simulation engine may be supplanted for a higher or lower fidelity version. The design flow of the development of these models is often performed in high-level languages as mentioned previously, which must then be translated into C or C++ code to be integrated into MAVERIC-II. Using principles of model-based design, we propose a unified method of auto-coding and interfacing between several languages and MAVERIC-II, which may be generalized further to any type of 6DOF simulation engine.
Molecular dynamics simulations of ultrafast radiation induced melting at metal–semiconductor interfaces
Metal–semiconductor contacts in silicon carbide (SiC) diodes endure damages at the interface when exposed to harsh radiation environments. Due to the rapid rise in temperature and ultrafast cooling that follows the radiation impact, the structural properties of the materials can be altered through melting, recrystallization, and amorphization. A detailed understanding of the material failure modes at the interface is lacking, specifically at the nanoscale. We use molecular simulations to investigate the ultrafast melting at tungsten (W)–SiC interfaces following radiation damage and apply deep learning techniques to track the transient evolution of the local molecular structures. We show that W near the radiation track undergoes melting and, eventually, most of it recrystallizes with a noticeable degree of undercooling, while SiC is rendered permanently amorphous. The observation of local undercooling in W films is important as it can affect the device performance even before the bulk melting temperature of the material is reached. We also show that at high temperatures, the interface undergoes a fracture-like failure. The results presented here are significant in understating the different failure modes of SiC diode materials.
Developing a Multilingual Auto-coding Interface for the MAVERIC-II Dynamics Simulator (Presentation)
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Validation of Small Satellite Dynamics Simulation Modules using ASTERIA Flight Data
No abstract provided
Molecular dynamics simulation of rotational relaxation in nitrogen: Implications for rotational collision number models
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Future trajectories of the Solar System: dynamical simulations of stellar encounters within 100 au
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Entropy-conserving Scheme for Modeling Nonthermal Energies in Fluid Dynamics Simulations
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Implementing Many-Body Potentials for Molecular Dynamics Simulations.
Abstract Not Provided
Molecular Dynamics SImulation of Grain Growth and Plastic Deformation during Surface Indentation of Nanocrystalline Nickel.
Abstract Not Provided
Spin dynamics simulations and the horizontal intrinsic resonance studies in the AGS using the Zgoubi code
N/A
Equilibrium and Non-Equilibrium Orbital-Free Molecuar Dynamics Simulations at Extreme Conditions
Abstract Not Provided
Molecular dynamics simulation of framework flexibility effects on noble gas diffusion in HKUST-1 and ZIF-8.
Abstract not provided.
Molecular Dynamics Simulations of a Single Pentablock Ionomer Chain in Dilute Solutions.
Abstract not provided.
Molecular Dynamics Simulation of Grain Evolution and Plastic Deformation during Indentation of Nanocrystalline Nickel.
Abstract not provided.