Matching Items (8)
Description
City managers and policy makers are increasing looking to environmental systems to provide beneficial services for urban systems. Constructed wetland systems (CWS), highly managed and designed wetland ecosystems, are being utilized to remove pollution, particularly excess nitrogen (N), from treated wastewater. Various wetland process remove N from effluent, such as denitrification, direct plant uptake, and soil accumulation. Emergent macrophytes provide direct uptake of N and improve conditions for microbially-mediated N processing. The role of different macrophytes species, however, is less understood and has primarily been examined in mesocosm and microcosm experiments and in mesic environments. I examined the effects of community composition on N removal and processing at the whole ecosystem scale in an aridland, constructed wetland (42 ha) through: 1) quantifying above- and belowground biomass and community composition from July 2011 \u2014 November 2012 using a non-destructive allometric technique, and; 2) quantifying macrophyte N content and direct macrophyte N uptake over the 2012 growing season. Average peak biomass in July 2011 & 2012 was 2,930 g dw/m2 and 2,340 g dw/m2, respectively. Typha spp. (Typha domingensis and Typha latifolia) comprised the majority (approximately 2/3) of live aboveground biomass throughout the sampling period. No statistically significant differences were observed in macrophyte N content among the six species present, with an overall average of 1.68% N in aboveground tissues and 1.29% N in belowground tissues. Per unit area of wetland, Typha spp. retained the most N (22 g/m2); total N retained by all species was 34 g/m2. System-wide direct plant N uptake was markedly lower than N input to the system and thus represented a small portion of system N processing. Soil accumulation of N also played a minor role, leaving denitrification as the likely process responsible for the majority of system N processing. Based on a literature review, macrophyte species composition likely influences denitrification through oxygen diffusion into soils and through the quality and quantity of carbon in leaf litter. While this study and the literature indicates Typha spp. may be the best species to promote wetland N processing, other considerations (e.g., bird habitat) and conditions (e.g., type of wastewater being treated) likely make mixed stands of macrophytes preferable in many applications. Additionally, this study demonstrated the importance of urban wetlands as scientific laboratories for scientists of all ages and as excellent stepping-off points for experiments of science-policy discourse.
ContributorsWeller, Nicholas Anton (Author) / Daniel L., Childers (Thesis director) / Grimm, Nancy (Committee member) / Turnbull, Laura (Committee member) / Barrett, The Honors College (Contributor) / School of Sustainability (Contributor) / School of Public Affairs (Contributor) / Graduate College (Contributor)
Created2013-05
Description
As the daughter of Mexican parents, I was raised with family-centered values which conflict with the values of independence, freedom and individuality stressed in the United States. Being a minority has become part of my identity, thus influencing how I make decisions about finances and traveling. Minorities are faced with many more concern, like familial concerns and financial obligations which hinder their desire to attempt to travel (Salisbury, Paulsen, & Ernest, 2011). My main concerns were convincing my parents that traveling to Nicaragua and studying abroad in Greece and Italy would be beneficial to my college experience, along with financially being able to go through with each experience. The main purpose of my thesis is to share what it is like to be a minority faced with cultural and financial obstacles that make it difficult to travel and how the experience is shaped due to these obstacles.
ContributorsValtierra, Nancy Jazmin (Author) / Larson, Elizabeth (Thesis director) / Facinelli, Diane (Committee member) / Barrett, The Honors College (Contributor) / T. Denny Sanford School of Social and Family Dynamics (Contributor) / Department of Psychology (Contributor) / Graduate College (Contributor)
Created2014-05
Description
Through this creative project, I executed a Distracted Driving Awareness Campaign at Arizona State University to raise awareness about the dangers of distracted driving, specifically texting while driving. As an Undergraduate Student Government Senator, my priority is the safety and success of students, both in and out of the classroom. By partnering with State Farm and AT&T, we were able to raise awareness about the dangers of distracted driving and collected over 200 pledges from students to never text and drive.
ContributorsHibbs, Jordan Ashley (Author) / Miller, Clark (Thesis director) / Parmentier, Mary Jane (Committee member) / Barrett, The Honors College (Contributor) / College of Liberal Arts and Sciences (Contributor) / School of Politics and Global Studies (Contributor) / Department of Psychology (Contributor) / Graduate College (Contributor)
Created2014-05
Description
An investigation of the Caregiver Autism Residential E-health (CARE) system composed of low-cost, end-user deployable smart home technology and accompanying heuristics for rule-based models of human behavior has been evaluated for its potential as an empowering assistive technology with the capacity to enhance the well-being of people living with autism, their caregivers, and family members. It allows adults living with autism to create personalized smart home interventions that provide motivational support and is accompanied by guidelines for a safe and effective means of behavioral change. This investigation contributes a participatory co-design approach which addresses both the role of flexibility for the dynamic needs of the individual while offering strategies for dealing with the challenges of designing assistive smart home technologies for the needs of individuals across the wide range of autism spectrum disorders.
ContributorsNewman, Naomi Catton (Author) / Burleson, Winslow (Thesis director) / Brotman, Ryan (Co-author) / Lozano, Cecil (Co-author) / Adams, Jim (Committee member) / Zautra, Alex (Committee member) / Barrett, The Honors College (Contributor) / Graduate College (Contributor) / School of Community Resources and Development (Contributor) / Department of Psychology (Contributor) / School of Human Evolution and Social Change (Contributor)
Created2013-05
Description
What characteristics do people prefer in potential mates? Previous studies have explored this question, discovering that preferred characteristics vary by people's sex and sexual strategy, but have implied that these preferences remain constant across the lifespan. We suggest, however, that systematic variation exists in individuals' mate preferences across the lifespan, as they shift their investments from mating toward parenting. We suggest that the characteristics of a potential mate can be viewed as affordances that assist or hinder an individual in achieving certain fundamental goals. Incorporating the framework of Life History Theory with this affordance-management approach to social behavior, we propose that an individual's life stage, sex, and life history strategy together serve as the basis for these goals and thereby shape the characteristics people seek in potential mates. Using data collected from participants aged 18-45 recruited on Amazon's Mechanical Turk, we tested a range of hypotheses derived from our approach. In general, results provide mixed support for a role of life stage in shaping mate preferences. For example, nurturance and social competence were viewed as more necessary characteristics in a mate by participants invested in parenting. Moreover, as their investment in mating increased, females expressed a greater preference for ambition in their potential mates, but males did not. Other predictions were not borne out, however, suggesting that there is still much to be learned from investigating the relationship between life stage and mate preferences.
ContributorsKalina, Catherine Ellen (Author) / Neuberg, Steven (Thesis director) / Glenberg, Arthur (Committee member) / Gangestad, Steven (Committee member) / Barrett, The Honors College (Contributor) / Department of Psychology (Contributor) / T. Denny Sanford School of Social and Family Dynamics (Contributor) / Graduate College (Contributor)
Created2014-05
Description
With obesity and metabolic diseases reaching epidemic levels, it is important to find ways to increase physical activity and improve diet. Previous studies have shown that improvements in mood can increase desire to perform physical activity, and that vitamin C intake is linked to improvements in mood. Based on this, two hypotheses were formed and tested to investigate the effect on physical activity levels and mood states from vitamin C supplementation at a dose of one gram per day in the form of a novel functional food. Thirty-one college students or faculty at Arizona State University were screened from a pool of applicants and placed into either a vitamin C or placebo group; all participants received the novel functional food to eat daily for four weeks. Serum levels of vitamin C, weight, height, BMI, body fat percentage, mood, and physical activity were measured before and after the functional food intervention. Vitamin C changed significantly through the course of the study in the experimental group. Baseline data for participants showed a positive correlation between vitamin C status and vigor, and a negative correlation between vitamin C status and weight and BMI. Physical activity was not related to vitamin C status, according to baseline data, and it did not significantly change over the course of the study. The results indicate that variance in BMI can be attributed to vitamin C status, but the study should be refined and tested again.
ContributorsHelland, Stephanie Lynn (Author) / Johnston, Carol (Thesis director) / Sweazea, Karen (Committee member) / Barrett, The Honors College (Contributor) / Department of Chemistry and Biochemistry (Contributor) / Department of Psychology (Contributor) / School of Life Sciences (Contributor) / Graduate College (Contributor)
Created2014-05
DescriptionEste tesis refleja en las representaciones cinematográficas del conflicto entre los nacionalistas y separatistas vascos terorristas de ETA y el gobierno español. Las películas "La pelota vasca", "El Lobo", y "Yoyes" son discutidas. Las relaciones familiares, las ideologías de los grupos, la identidad, y el terrorismo son investigados.
ContributorsKultala, Rachel Louise (Author) / Urioste-Azcorra, Carmen (Thesis director) / GarcÃÂa Fernández, Carlos (Committee member) / Gil-Osle, Juan (Committee member) / Barrett, The Honors College (Contributor) / T. Denny Sanford School of Social and Family Dynamics (Contributor) / School of International Letters and Cultures (Contributor) / Graduate College (Contributor)
Created2013-05
Description
Exercise has many physical and mental health benefits, but there are several common barriers to physical activity that the general population faces. Furthermore, it has been shown that transgender individuals do not participate in physical activity as much as nontransgender individuals do. This suggests that the transgender population may face additional or unique barriers to physical activity. The purpose of this study was to further examine and identify these barriers for adult transgender individuals regardless of whether they decided to, were in the process of, or completed medical transition. Five categories of physical activity barriers were analyzed within a survey: time, motivation, accessibility, emotions, and social factors. This online physical activity questionnaire was distributed to transgender adults 18 years or older over a course of two months. Twelve responses were received but only nine of those met the inclusion criteria and were used in the study (n=9). Three questions were asked for each barrier category and were formatted as a Likert scale. Each question and barrier category was given a score based on if the responses indicated that particular instance as a barrier to physical activity or not. The results of the survey responses showed that social factors was the highest reported barrier to physical activity for transgender adults. Emotions was the second highest reported barrier, while accessibility was the lowest reported barrier. The responses from this study indicate that transgender adults do experience different or additional barriers to physical activity when compared to the general population.
ContributorsTonn, Lauren Elizabeth (Co-author) / Hilliard, Hope (Co-author) / Milowski, Meredith (Thesis director) / Hoffner, Kristin (Committee member) / College of Health Solutions (Contributor) / Graduate College (Contributor) / Barrett, The Honors College (Contributor)
Created2020-12