On-shell formulations of scattering amplitudes for quantum field theories, without utilizating the local descriptions of Lagrangian and Feynman diagrams, have become increasingly useful and important in recent years for both formal and practical reasons. The nonlinear sigma model (NLSM), which describes the interactions between Nambu-Goldstone bosons, is an ideal testing...
This dissertation addresses problems in the source properties of major earthquakes. It is composed of four largely independent studies. In chapter 2, we explore the possible theoretical origin of the distance-depth correction q(, h) introduced 75 years ago by B. Gutenberg for the computation of the body wave magnitude mb,...
Orienting attention enables us to select, process, and react to relevant objects in complex environments. Just as we can orient attention in space and to certain object features, recent research has shown that we can also orient attention in time (temporal orienting). This dissertation investigates the mechanisms and the effects...
The objective of molecular imaging is to noninvasively visualize biochemical events in a living system at the cellular level. Magnetic resonance imaging (MRI) is a promising modality for this goal due to its excellent resolution, unlimited depth penetration, and absence of harmful ionizing radiation. MRI techniques frequently use Gd(III)-based contrast...
Over the last few years, understanding user experience within mobile systems has become a popular phenomenon as a means to manage hardware resources. Across the many issues being studied in this area, I focus on how to utilize user satisfaction in this dissertation. Notably, I examine user experience by incorporating...
In today’s climate of rising economic inequality, drone warfare, xenophobic politics, and Big Brother technology, understanding how we might best design learning environments to provide opportunities for expanding the purpose and potentialities of STEM education for minoritized communities grows in importance daily. This dissertation is a 3-part study that examines...
More than a quarter century of research finds that teams often fail to make high-quality decisions. This literature is based on observing team decisions in one-off decision making episodes, when in reality, most teams work together for an extended period of time, making repeated decisions together. Do teams improve or...
The insulin/Insulin-Like Growth Factor (IGF) pathway is essential for linking nutritional status to growth and metabolism. MicroRNAs (miRNAs) are short RNAs that are players in the regulation of this process. The miRNA miR-7 shows highly conserved expression in insulin-producing cells across the animal kingdom. However, its conserved functions in regulation...
Considerable progress has been made in characterizing the neural circuits that underlie stress, fear, feeding, and pain. However, little is known about how they affect each other. Stress bidirectionally regulates feeding, either increases (e.g., stress-induced binge eating) or decreases (e.g., stress-induced anorexia), depending on the types of stressors, duration of...
Exposure to violence, which includes child abuse, neglect, witnessing domestic or community violence, crime, and sexual assault, is a national concern. Over the course of a year, 68% of children under age 17 are exposed to at least one form of violence (Finkelhor, Turner, Shattuck, & Hamby, 2015). Young children...