In support of the US Army Mission System Architecture Demonstration, Adventium Labs conducted a series of interviews and demonstrations to determine requirements, best practices, and available tool capabilities for building and maintaining an Authoritative Source of Truth (ASoT). An ASoT is a capability that gives definitive answers to queries about a target collection of systems. An ASoT should make information discoverable, enable controlled information sharing, and maintain traceability across time and organizations. The challenges to establishing an ASoT include limited standards adoption by tool vendors, entrenched workflows, and data rights management needs. The systems engineering community can overcome these challenges by keeping ASoT needs at the forefront when planning engineering activities, investing in open and flexible standards for information sharing, and leveraging emerging connectivity tools and model-based systems engineering methods.

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Low mass, main sequence stars like our Sun exhibit a wide variety of rotational and magnetic states. Observational and theoretical advances have led to a renewed emphasis on understanding the rotational and magnetic evolution of sun-like stars has become a pressing problem in stellar physics. We use global 3D convection and convective dynamo simulations in rotating spherical shells and with realistic stellar stratification to explore the behavior of “middle-aged” stars. We show that for stars with slightly less rotational influence than our Sun a transition occurs from solar-like (fast equator, slow poles) to anti-solar (slow equator, fast poles) differential rotation. We investigate this transition using two different treatments for the upper boundary of our simulations and we hypothesize that this transition from solar-like to anti-solar differential rotation may be responsible for observations of anomalously rapid rotation for stars older than our Sun.

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