Local organic gardening once experienced great popularity with Americans. At one time promoted and prominent, local gardens became obscure, old-fashioned, and outmoded. However, in the last few decades, for various reasons, local organic gardening has made some progress. This study seeks to assist high-density, low-income, inner-city Americans, who often do not have have easy or affordable access to fresh whole food by creating sustainable, resilient, local, urban gardens. However, this effort does not attempt to address the needs of entire populations of census tracts, rather one suburban home, one small apartment complex, or one small community garden. O ne solution to the problems associated with food insecurity is to put the creativity and responsibility into the hands of those who need the food, allow them to work within a self-sustaining garden, and decide what to do with any excess food. W ith the help of Greg Peterson, Phoenix’s own urban farmer, this project set out to create a system using Phoenix’s limited amount of rainfall to create a aquaponic gardening system which will be used in micro-communities such as multi-family complexes, middle schools, or high schools, in order to help grow food for these communities and alleviate some of the difficulties of finding fresh food in the desert.
Food insecurity is a major issue within the United States. Millions of households experience limited food availability, especially in regions deemed food deserts. Food deserts are geographical regions across the United States that possess limited access to grocery stores or supermarkets, and thus limited access to healthy food options. Individuals living in food deserts are at an increased risk of developing a mental illness, including depression, bipolar disorder, Alzheimer’s Disease, and Attentional Deficit Hyperactivity Disorder (ADHD). Mental health is often associated with one’s environment or genetic susceptibility, and treatments are often focused on psychotherapeutic methods and prescription medication. In investigating food deserts and diets characteristic of food deserts, one can begin to make connections between food and mental health. Dietary patterns that exhibit greater concentrations of fats and sugars are associated with many of the symptoms of common mood disorders and are significant in producing biological indicators, like inflammation, which is identified in various neurodegenerative disorders. Brain foods like vitamins and omega-3 fatty acids among others, provide a unique lens into the ways the food and the brain interact, specifically through a concept termed the gut-brain axis. Research surrounding these connections, especially in a newer field called nutritional psychiatry, inform the ways in which researchers, scholars, and medical professionals understand mental health and food insecurity. These connections may also prompt future research in the field focused on food-based treatments and the use of food as a preventative form of medicine.
Food insecure populations suffer from the ability to access affordable and nutritious foods as a result of financial and transportation needs. Often these populations are concentrated in areas referenced as food deserts. A food desert is an area that does not have a supermarket or large grocery store within a mile and often is saturated with small non-traditional food stores and fast- food establishments. In this study, 21 food deserts along Grand Avenue in Downtown Phoenix were analyzed to better understand their access to food, population statistics and barriers to being food secure. The research question analyzed is the impact food insecurity has on communities in Phoenix, Arizona. The findings are presented in the form of a research paper, as well as 15 black and white film photographs accompanied by descriptions. There is primary qualitative data presented through photographs and observations, as well as secondary quantitative data analyzed from Census data. The food deserts studied consist of communities that are low-income and majority minority with little to no access to nutritious food in their area. The economics of food insecurity and grocery stores, racial discrimination, access to transportation, impacts on health and education and the sustainability of food deserts are all aspects of food insecurity discussed in the research. Possible solutions such as community gardens and subsidized grocery stores are also presented. The study revealed that food insecurity has several negative impacts on the affected populations and communities and disproportionately impacts low-income and minority communities.
for Unmanned Aerial Vehicles.
Towards enabling a UAV to autonomously sense and avoid moving obstacles, this thesis makes the following contributions. Initially, an image-based reactive motion planner is developed for a quadrotor to avoid a fast approaching obstacle. Furthermore, A Dubin’s curve based geometry method is developed as a global path planner for a fixed-wing UAV to avoid collisions with aircraft. The image-based method is unable to produce an optimal path and the geometry method uses a simplified UAV model. To compensate
these two disadvantages, a series of algorithms built upon the Closed-Loop Rapid Exploratory Random Tree are developed as global path planners to generate collision avoidance paths in real time. The algorithms are validated in Software-In-the-Loop (SITL) and Hardware-In-the-Loop (HIL) simulations using a fixed-wing UAV model and in real flight experiments using quadrotors. It is observed that the algorithm enables a UAV to avoid moving obstacles approaching to it with different directions and speeds.