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- Creators: School of Life Sciences
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Description
Aquatic macroinvertebrates are important for many ecological processes within river ecosystems and, as a result, their abundance and diversity are considered indicators of water quality and ecosystem health. Macroinvertebrates can be classified into functional feeding groups (FFG) based on morphological-behavioral adaptations. FFG ratios can shift due to changes in normal disturbance patterns, such as changes in precipitation, and from human impact. Due to their increased sensitivity to environmental changes, it has become more important to protect and monitor aquatic and riparian communities in arid regions as climate change continues to intensify. Therefore, the diversity and richness of macroinvertebrate FFGs before and after monsoon and winter storm seasons were analyzed to determine the effect of flow-related disturbances. Ecosystem size was also considered, as watershed area has been shown to affect macroinvertebrate diversity. There was no strong support for flow-related disturbance or ecosystem size on macroinvertebrate diversity and richness. This may indicate a need to explore other parameters of macroinvertebrate community assembly. Establishing how disturbance affects aquatic macroinvertebrate communities will provide a key understanding as to what the stream communities will look like in the future, as anthropogenic impacts continue to affect more vulnerable ecosystems.
ContributorsSainz, Ruby (Author) / Sabo, John (Thesis director) / Grimm, Nancy (Committee member) / Lupoli, Christina (Committee member) / School of Life Sciences (Contributor, Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
Description
Catastrophe events occur rather infrequently, but upon their occurrence, can lead to colossal losses for insurance companies. Due to their size and volatility, catastrophe losses are often treated separately from other insurance losses. In fact, many property and casualty insurance companies feature a department or team which focuses solely on modeling catastrophes. Setting reserves for catastrophe losses is difficult due to their unpredictable and often long-tailed nature. Determining loss development factors (LDFs) to estimate the ultimate loss amounts for catastrophe events is one method for setting reserves. In an attempt to aid Company XYZ set more accurate reserves, the research conducted focuses on estimating LDFs for catastrophes which have already occurred and have been settled. Furthermore, the research describes the process used to build a linear model in R to estimate LDFs for Company XYZ's closed catastrophe claims from 2001 \u2014 2016. This linear model was used to predict a catastrophe's LDFs based on the age in weeks of the catastrophe during the first year. Back testing was also performed, as was the comparison between the estimated ultimate losses and actual losses. Future research consideration was proposed.
ContributorsSwoverland, Robert Bo (Author) / Milovanovic, Jelena (Thesis director) / Zicarelli, John (Committee member) / School of Mathematical and Statistical Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2018-05
Description
Climate change presents a significant threat to human health, both mental and physical; as a result, it has become one of the most commonly discussed phenomena of the 21st century. As many people are aware, a wide range of social and physical factors affects mental health. However, many people fail to realize that these increases global temperatures also have a significant impact on mental health as a result of increased vulnerability that is often manifested through one's emotions. By analyzing perceptions of people across the globe, in the United Kingdom, New Zealand, and Fiji, we were able to pinpoint these emotions and trace them individual's feelings of worry, distress, and hope that resulted from their perceived impacts on climate change. Overall, we found that people tend to have overall more negative emotional reaction when it comes to the perceived effects of climate change. Of the respondents, more men than women expressed concern regarding the various negative implications. Finally, those in the United Kingdom exhibited a stronger emotional response, followed by those in New Zealand and Fiji, respectively.
ContributorsSmith, Austin Lee (Author) / Wutich, Amber (Thesis director) / du Bray, Margaret (Committee member) / Department of Psychology (Contributor) / Sanford School of Social and Family Dynamics (Contributor) / School of Life Sciences (Contributor) / School of Human Evolution and Social Change (Contributor) / Barrett, The Honors College (Contributor)
Created2017-05
Description
AARP estimates that 90% of seniors wish to remain in their homes during retirement. Seniors need assistance as they age, historically they have received assistance from either family members, nursing homes, or Continuing Care Retirement Communities. For seniors not wanting any of these options, there has been very few alternatives. Now, the emergence of the continuing care at home program is providing hope for a different method of elder care moving forward. CCaH programs offer services such as: skilled nursing care, care coordination, emergency response systems, aid with personal and health care, and transportation. Such services allow seniors to continue to live in their own home with assistance as their health deteriorates over time. Currently, only 30 CCaH programs exist. With the growth of the elderly population in the coming years, this model seems poised for growth.
ContributorsSturm, Brendan (Author) / Milovanovic, Jelena (Thesis director) / Hassett, Matthew (Committee member) / School of Mathematical and Statistical Sciences (Contributor) / Economics Program in CLAS (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
The fight for climate justice has been ongoing for decades. However, in a recent effort to address climate change, U.S. congressional leaders Alexandria Ocasio-Cortez of New York and Edward J. Markey of Massachusetts proposed a resolution known as the Green New Deal (GND). Though congress defeated the proposal, the policy changes envisioned within it have gained political momentum from states and municipalities. So much so, municipalities in the United States have decided to implement their own versions of the GND proposal. Throughout this paper, I analyze the components of three nationally recognized climate proposals that offer a unique approach to actualize the federal GND objectives: New York City's Climate Mobilization Act, Los Angeles's Green New Deal – Sustainable City pLAn, and Seattle's Green New Deal. From these proposals, I draw comparisons to Tempe's Climate Action plan to evaluate their efforts. Though this paper is primarily focused on analyzing the components of municipal GNDs across the nation, this paper also contends that municipalities' are a necessary complement to national efforts in mitigating climate change.
ContributorsMazariegos, Ashley (Author) / Fong, Benjamin Y. (Thesis director) / Calhoun, Craig (Committee member) / Economics Program in CLAS (Contributor) / School of Public Affairs (Contributor) / Barrett, The Honors College (Contributor)
Created2020-12
Description
This thesis analyzes the implications of climate change for insect-borne diseases in humans, focusing especially on mosquitoes and ticks as the two most common vectors. I first introduce relevant background on climate change, arthropod vectors, and the diseases they carry, and the significance of vector-borne diseases for human health. I report on current knowledge of spatial and temporal trends in most common mosquito and tick-borne diseases in the United States, with a detailed table provided in Appendix A. I then review how climatic variability is anticipated to cause profound changes in vector life cycles. In particular, the rise in global ambient temperatures is likely to be the primary driver of arthropod proliferation, although they are also sensitive to changes in humidity, carbon dioxide levels, and water levels. As regions warm, arthropods will be able to survive where they were not able to previously, potentially infecting more individuals. The incidence of several vector-borne diseases in the United States is predicted to increase in multiple states as climate change progresses. The World Health Organization predicts that in North America, Dengue Hemorrhagic Fever and Lyme disease will become the primary vector-borne diseases that are increasingly common (Githeko, et. al, 2000).
ContributorsKarjala, Sylvia (Author) / Sterner, Beckett (Thesis director) / Jevtic, Petar (Committee member) / School of Life Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2020-12
Description
Greenhouse gas emissions (GHG) continue to contribute heavily to global warming. It is estimated that the international community has only until 2050 to eliminate total carbon emissions or risk irreversible climate change. Arizona, despite its vast solar energy resources, is particularly behind in the global transition to carbon-free energy. This paper looks to explore issues that may be preventing Arizona from an efficient transition to carbon-free generation technologies. Identifiable factors include outdated state energy generation standards, lack of oversight and accountability of Arizona’s electricity industry regulatory body, and the ability for regulated utilities to take advantage of “dark money” campaign contributions. Various recommendations for mitigating the factors preventing Arizona from a carbon-free future are presented. Possibilities such as modernizing state energy generation standards, increasing oversight and accountability of Arizona’s electricity industry regulatory body, and potential market restructuring which would do away with the traditional regulated utility framework are explored. The goal is to inform readers of the issues plaguing the Arizona energy industry and recommend potential solutions moving forward.
ContributorsWaller, Troy (Author) / Sheriff, Glenn (Thesis director) / Rule, Troy (Committee member) / Economics Program in CLAS (Contributor) / Dean, W.P. Carey School of Business (Contributor, Contributor) / Barrett, The Honors College (Contributor)
Created2020-12
Description
A factor accounting for the COVID-19 pandemic was added to a generalized linear model to more accurately predict unpaid claims. COVID-19 has affected not just healthcare, but all sectors of the economy. Because of this, whether or not an automobile insurance claim is filed during the pandemic needs to be taken into account while estimating unpaid claims. Reserve-estimating functions such as glmReserve from the “ChainLadder” package in the statistical software R were experimented with to produce their own results. Because of their insufficiency, a manual approach to building the model turned out to be the most proficient method. Utilizing the GLM function, a model was built that emulated linear regression with a factor for COVID-19. The effects of such a model are analyzed based on effectiveness and interpretablility. A model such as this would prove useful for future calculations, especially as society is now returning to a “normal” state.
ContributorsKossler, Patrick (Author) / Zicarelli, John (Thesis director) / Milovanovic, Jelena (Committee member) / Barrett, The Honors College (Contributor) / School of Mathematical and Statistical Sciences (Contributor)
Created2022-05
Description
Climate change has necessitated the transition from non-renewable energy sources such as coal, oil, and natural gas to renewable, low-carbon energy sources such as solar, wind, and hydroelectric. These energy sources, although much better equipped to reduce carbon-induced climate change, require materials that pollute the environment when mined and can release toxic waste during processing and disposal. Critical minerals are used in low-carbon renewable energy, and they are subject to both the environmental issues that accompany regular mineral extraction as well as issues related to scarcity from geopolitical issues, trade policy, and geological rarity. Tellurium is a critical mineral produced primarily as a byproduct of copper and used in cadmium-telluride (CdTe) solar panels. As these solar panels become more common, the problems that arise with many critical minerals’ usage (pollution, unfair distribution, human health complications) become more apparent. Looking at these issues through an energy justice framework can help to ensure availability, sustainability, inter/intragenerational equity, and accountability, and this framework can provide a more nuanced understanding of the costs and the benefits that will accrue with the transition to low-carbon, renewable energy. Energy justice issues surrounding the extraction of critical minerals will become increasingly prevalent as more countries pledge to have a zero-carbon future.
ContributorsMaas, Samantha (Author) / Jalbert, Kirk (Thesis director) / Chester, Mikhail (Committee member) / Barrett, The Honors College (Contributor) / School of Public Affairs (Contributor) / School of Life Sciences (Contributor)
Created2022-05
Description
Climate change is a well-known global threat to societal systems; however, its effects on the health of individuals are often less evident. Physicians who aim to properly treat patients holistically must be educated on the various forms of illness and disease projected to be exacerbated by climate change. Without this necessary climate education, physicians run the risk of being unable to fulfill the most sacred charge of the Hippocratic oath: Do No Harm. To ensure that physicians moving forward are prepared to face this new global health threat, the prevalence of climate change in current medical school curricula must be examined. Content analysis of publicly available medical school curricula in the Southwest U.S. was done using ChatGPT to track the frequency of climate health search terms. Medical school curricula analyzed included mandatory degree programs as well as optional dual degree programs or pathways for medical student education. Researchers found that medical schools within the Southwest region of the United States are not sufficiently preparing students to mitigate the regional effects of climate change on the health of patients. Mandatory medical degree curriculum does not sufficiently educate on climate health issues, nor is it present in Utah, New Mexico, or Colorado. Optional degrees and pathways are available to medical students to enroll in and may be sufficient to educate a medical student, but are not enticing enough to sufficiently educate all medical students. Some medical schools have recently conducted revisals of their mandatory curriculum and still show a lack of education available about climate health issues. The lack of educational resources for future providers could lead to detrimental health outcomes for patients, and medical schools in development should take the lead in educating their students about climate health issues.
ContributorsJamieson, Ann (Author) / Gutierrez, Sean (Co-author) / Vanos, Jennifer (Thesis director) / Lobo, Jose (Committee member) / Barrett, The Honors College (Contributor) / School of Life Sciences (Contributor) / Historical, Philosophical & Religious Studies, Sch (Contributor)
Created2023-12