Programs and Communities

Hybrid system models - those devised from two or more disparate sub-system models - provide a number of benefits in terms of conceptualization, development, and assessment of dynamical systems. The decomposition approach helps to formulate complex interactions that are otherwise difficult or impractical to express. However, hybrid model development and usage can introduce complexity that emerges from the composition itself.

To improve assurance of model correctness, sub-systems using disparate modeling formalisms must be integrated above and beyond just the data and control level; their composition must have model specification and simulation execution aspects as well. Poly-formalism composition is one approach to composing models in this manner.

This dissertation describes a poly-formalism composition between a Discrete EVent System specification (DEVS) model and a Cellular Automata (CA) model types. These model specifications have been chosen for their broad applicability in important and emerging domains. An agent-environment domain exemplifies the composition approach. The inherent spatial relations within a CA make it well-suited for environmental representations. Similarly, the component-based nature of agents fits well within the hierarchical component structure of DEVS.

This composition employs the use of a third model, called an interaction model, that includes methods for integrating the two model types at a formalism level, at a systems architecture level, and at a model execution level. A prototype framework using DEVS for the agent model and GRASS for the environment has been developed and is described. Furthermore, this dissertation explains how the concepts of this composition approach are being applied to a real-world research project.

This dissertation expands the tool set modelers in computer science and other disciplines have in order to build hybrid system models, and provides an interaction model for an on-going research project. The concepts and models presented in this dissertation demonstrate the feasibility of composition between discrete-event agents and discrete-time cellular automata. Furthermore, it provides concepts and models that may be applied directly, or used by a modeler to devise compositions for other research efforts.

Extreme heat, a widespread environmental hazard, is experienced disproportionately by historically disinvested and marginalized communities in Tempe. The City of Tempe has thus identified the importance of preparing the City’s youth to move into positions of power within the community to prepare for a future of rising temperatures and climate uncertainty, specifically as it relates to intergenerational community resilience. The City’s long-term Cool Kids, Cool Places, Cool Futures project plans to accelerate the City’s existing climate action by activating and empowering local youth as change agents in the co-creation of cooler, more equitable, and healthier futures. This MSUS project aims to develop strategies for the youth and the city that work together to advocate for and implement youth-designed and neighborhood-focused climate action projects in the Escalante and Victory Acres neighborhoods. The envisioned solution for this project is the creation of a dual strategy to connect youths’ visions for the future of Tempe with the City’s capacity (resources, funding, etc.) to adequately implement them. To complete this, the MSUS team facilitated a visioning workshop for local youth at McClintock High School to brainstorm potential climate action projects. As a result of this workshop, an action guide was then developed by the MSUS team with strategies to help jumpstart these youth-designed projects, highlighting the necessary social and physical assets and infrastructures needed for the projects to succeed. In turn, the City received a report outlining how they can best support the youth in the realization of these action projects. Both of these strategy guides will be used in parallel to begin the implementation of the climate action projects in the Fall of 2022.

Extreme heat, a widespread environmental hazard, is experienced disproportionately by historically disinvested and marginalized communities in Tempe. The City of Tempe has thus identified the importance of preparing the City’s youth to move into positions of power within the community to prepare for a future of rising temperatures and climate uncertainty, specifically as it relates to intergenerational community resilience. The City’s long-term Cool Kids, Cool Places, Cool Futures project plans to accelerate the City’s existing climate action by activating and empowering local youth as change agents in the co-creation of cooler, more equitable, and healthier futures. This MSUS project aims to develop strategies for the youth and the city that work together to advocate for and implement youth-designed and neighborhood-focused climate action projects in the Escalante and Victory Acres neighborhoods. The envisioned solution for this project is the creation of a dual strategy to connect youths’ visions for the future of Tempe with the City’s capacity (resources, funding, etc.) to adequately implement them. To complete this, the MSUS team facilitated a visioning workshop for local youth at McClintock High School to brainstorm potential climate action projects. As a result of this workshop, an action guide was then developed by the MSUS team with strategies to help jumpstart these youth-designed projects, highlighting the necessary social and physical assets and infrastructures needed for the projects to succeed. In turn, the City received a report outlining how they can best support the youth in the realization of these action projects. Both of these strategy guides will be used in parallel to begin the implementation of the climate action projects in the Fall of 2022.

Extreme heat, a widespread environmental hazard, is experienced disproportionately by historically disinvested and marginalized communities in Tempe. The City of Tempe has thus identified the importance of preparing the City’s youth to move into positions of power within the community to prepare for a future of rising temperatures and climate uncertainty, specifically as it relates to intergenerational community resilience. The City’s long-term Cool Kids, Cool Places, Cool Futures project plans to accelerate the City’s existing climate action by activating and empowering local youth as change agents in the co-creation of cooler, more equitable, and healthier futures. This MSUS project aims to develop strategies for the youth and the city that work together to advocate for and implement youth-designed and neighborhood-focused climate action projects in the Escalante and Victory Acres neighborhoods. The envisioned solution for this project is the creation of a dual strategy to connect youths’ visions for the future of Tempe with the City’s capacity (resources, funding, etc.) to adequately implement them. To complete this, the MSUS team facilitated a visioning workshop for local youth at McClintock High School to brainstorm potential climate action projects. As a result of this workshop, an action guide was then developed by the MSUS team with strategies to help jumpstart these youth-designed projects, highlighting the necessary social and physical assets and infrastructures needed for the projects to succeed. In turn, the City received a report outlining how they can best support the youth in the realization of these action projects. Both of these strategy guides will be used in parallel to begin the implementation of the climate action projects in the Fall of 2022.

Extreme heat, a widespread environmental hazard, is experienced disproportionately by historically disinvested and marginalized communities in Tempe. The City of Tempe has thus identified the importance of preparing the City’s youth to move into positions of power within the community to prepare for a future of rising temperatures and climate uncertainty, specifically as it relates to intergenerational community resilience. The City’s long-term Cool Kids, Cool Places, Cool Futures project plans to accelerate the City’s existing climate action by activating and empowering local youth as change agents in the co-creation of cooler, more equitable, and healthier futures. This MSUS project aims to develop strategies for the youth and the city that work together to advocate for and implement youth-designed and neighborhood-focused climate action projects in the Escalante and Victory Acres neighborhoods. The envisioned solution for this project is the creation of a dual strategy to connect youths’ visions for the future of Tempe with the City’s capacity (resources, funding, etc.) to adequately implement them. To complete this, the MSUS team facilitated a visioning workshop for local youth at McClintock High School to brainstorm potential climate action projects. As a result of this workshop, an action guide was then developed by the MSUS team with strategies to help jumpstart these youth-designed projects, highlighting the necessary social and physical assets and infrastructures needed for the projects to succeed. In turn, the City received a report outlining how they can best support the youth in the realization of these action projects. Both of these strategy guides will be used in parallel to begin the implementation of the climate action projects in the Fall of 2022.

This document was compiled as part of the culminating experience for the Master of

Sustainability Solutions (MSUS) program at Arizona State University in 2022. The MSUS

students involved worked on this project for approximately nine months, and therefore, relied on

the relationship-building capacity of the City’s Youth Council Coordinator to connect with the

McClintock students. All of the students who comprised the MSUS team have not and do not

reside in the Escalante and Victory Acres neighborhoods. Nor have any of the MSUS students

had prior contact or relationships with the Escalante and Victory Acres neighborhoods. The

MSUS team was limited in the amount of time in which they were approved to physically be

present on the McClintock High School campus. Similarly, due to the academic constraints

presented by ASU, the MSUS team faced a time constraint when it came to follow-up activities.