abstract: Behavioral health problems such as physical inactivity are among the main causes of mortality around the world. Mobile and wireless health (mHealth) interventions offer the opportunity for applying control engineering concepts in behavioral change settings. Social Cognitive Theory (SCT) is among the most influential theories of health behavior and has been used as the conceptual basis of many behavioral interventions. This dissertation examines adaptive behavioral interventions for physical inactivity problems based on SCT using system identification and control engineering principles. First, a dynamical model of SCT using fluid analogies is developed. The model is used throughout the dissertation to evaluate system identification approaches and to develop control strategies based on Hybrid Model Predictive Control (HMPC). An initial system identification informative experiment is designed to obtain basic insights about the system. Based on the informative experimental results, a second optimized experiment is developed as the solution of a formal constrained optimization problem. The concept of Identification Test Monitoring (ITM) is developed for determining experimental duration and adjustments to the input signals in real time. ITM relies on deterministic signals, such as multisines, and uncertainty regions resulting from frequency domain transfer function estimation that is performed during experimental execution. ITM is motivated by practical considerations in behavioral interventions; however, a generalized approach is presented for broad-based multivariable application settings such as process control. Stopping criteria for the experimental test utilizing ITM are developed using both open-loop and robust control considerations. A closed-loop intensively adaptive intervention for physical activity is proposed relying on a controller formulation based on HMPC. The discrete and logical features of HMPC naturally address the categorical nature of the intervention components that include behavioral goals and reward points. The intervention incorporates online controller reconfiguration to manage the transition between the behavioral initiation and maintenance training stages. Simulation results are presented to illustrate the performance of the system using a model for a hypothetical participant under realistic conditions that include uncertainty. The contributions of this dissertation can ultimately impact novel applications of cyberphysical system in medical applications. / Dissertation/Thesis / Doctoral Dissertation Electrical Engineering 2016

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Global warming is one of the gravest concerns that the world is now dealing with. This phenomenon is caused by a variety of factors. Carbon dioxide emitted from transportation networks is a significant contributor to global warming. Transportation systems comprise both the urban mobility sector (including public transportation and private vehicles) and the road transportation system. In line with this issue, governments across the globe have been implementing new technologies and strategies to mitigate carbon dioxide emissions. Meanwhile, changing passengers’ mobility behaviors through the application of nudging techniques has recently been identified as a feasible option by them. This research seeks to improve the efficiency of nudging approaches used in the mobility sector by assisting local authorities in designing appropriate behavioral interventions. To do so, ten city representatives including sustainability experts, and city managers were chosen, and semi-structured interviews were carried out to thoroughly understand their needs and expectations in terms of selecting the most effective nudges for encouraging citizens to use more sustainable modes of transport. The collected data were analyzed applyingtheThematicmethod. Finally, using the Value Proposition Design model, the design characteristics for the development of an ‘Intervention Design Tool’are determined. Our findings reveal that features such as simulating scenarios and interventions based on the behavior context and then providing users with situation-aware nudges are crucial for the creation of an 'intervention Design Tool’. Furthermore, this device must provide city representatives, as the main user of the tool, with a comprehensive view of the targeted city while alerting them to crucial situations and trends. As a consequence, the benefits that city representatives obtain from using this tool include reducing effort and saving time while increasing the reliability of their decisions.

Educators are under increasing pressure to improve the climate and safety in urban schools. Unfortunately, schools have addressed school safety concerns by increasing exclusionary measures such as suspensions and expulsions. Knowing that exclusionary measures can have detrimental effects, state legislatures have called for more proactive strategies for positive student behavior and increased school climates. Positive Behavioral Interventions and Supports is a proactive, school-wide approach to discipline that shifts the focuses from punitive measure to teaching, promoting, and supporting positive behavior to all students (Suagai & Horner, 2006). As a result, PBIS has been linked to positive school climates and reductions in exclusionary measures. This mixed methods study examined the implementation efforts and barriers to sustained implementation of PBIS in three urban school districts in Northern California. A modified version of the School-Wide Evaluation Tool (SET) was sent to the school site administrators in the three urban school districts in Northern California that had participated in a four day PBIS training. A small return rate was yielded (n=17), therefore only summary data could be reported. School site administrators indicated that the following practices were in place: three to five positively stated rules, rules were posted throughout the campus, a PBIS team has been established, the administrator was an active participant on the team, and an acknowledgment system had been implemented. Discipline data was analyzed from pre-implementation in 2010-2011 and after implementation in 2014-2015 using Paired t-Tests. Results indicated that there was statistical significance for overall suspension, expulsion and truancy data of the three school districts. Wilcoxon signed ranks tests were also conducted on pre-implementation and implementation discipline data by ethnicity and types of discipline. No statistical significance was noted for ethnicity and discipline type, but reductions in the number of suspensions and expulsions for various ethnic groups (i.e. African-Americans, Hispanics, and Whites) and discipline types (i.e. violence, disruptive/defiance, and physical injury) were indicated pre-implementation and after implementation. Additionally, six school site administrators were interviewed to understand various barriers to sustained implementation of PBIS. Three themes emerged regarding sustained implementation which included staff buy-in, additional training, and competing priorities and initiatives.

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Research reveals that disciplinary alternative education programs (DAEPs) are growing at an alarming rate. What are schools doing to ensure success for those students who are placed in a DAEP? In this descriptive qualitative research study, I examined how DAEPs can operate at a more effective level in order to provide a restorative environment, resulting in a decreased recidivism rate for troubled youth. In order to achieve this overall objective, the following research questions framed this study RQ1: What are the qualities in a disciplinary alternative education program setting that lead to either success or failure of a DAEP program? RQ2: Why do students continue to commit offenses which lead to multiple assignments in a disciplinary alternative education program? RQ3: How does a disciplinary alternative education program provide a restorative environment for troubled youth in order to decrease recidivism? RQ4: What resources are available to reduce the amount of repeat student assignments to DAEP? Participants were 12 North Texas secondary school students with multiple assignments to DAEPs and 12 North Texas secondary counselors who provide emotional and behavioral supports to these students. The findings indicate there is a high need for the implementation of transitional supports, a high need for consistent and targeted counselor support and resources, a high need to change student behavior, a high need to build positive relationships, and a high need to address the environmental (social) factors that influence behavior.

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