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Turbidity is a known problem for UV water treatment systems as suspended particles can shield contaminants from the UV radiation. UV systems that utilize a reflective radiation chamber may be able to decrease the impact of turbidity on the efficacy of the system. The purpose of this study was to

Turbidity is a known problem for UV water treatment systems as suspended particles can shield contaminants from the UV radiation. UV systems that utilize a reflective radiation chamber may be able to decrease the impact of turbidity on the efficacy of the system. The purpose of this study was to determine how kaolin clay and gram flour turbidity affects inactivation of Escherichia coli (E. coli) when using a UV system with a reflective chamber. Both sources of turbidity were shown to reduce the inactivation of E. coli with increasing concentrations. Overall, it was shown that increasing kaolin clay turbidity had a consistent effect on reducing UV inactivation across UV doses. Log inactivation was reduced by 1.48 log for the low UV dose and it was reduced by at least 1.31 log for the low UV dose. Gram flour had a similar effect to the clay at the lower UV dose, reducing log inactivation by 1.58 log. At the high UV dose, there was no change in UV inactivation with an increase in turbidity. In conclusion, turbidity has a significant impact on the efficacy of UV disinfection. Therefore, removing turbidity from water is an essential process to enhance UV efficiency for the disinfection of microbial pathogens.
ContributorsMalladi, Rohith (Author) / Abbaszadegan, Morteza (Thesis director) / Alum, Absar (Committee member) / Fox, Peter (Committee member) / School of Human Evolution & Social Change (Contributor) / School of Life Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
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Description
Accurately predicting local ranges of isotopic signatures in human populations is essential for answering questions about past migrations and mobility. While local ranges of δ18O can be estimated using modern baseline samples and precipitation models, there are many environmental and anthropogenic drivers that can cause these ranges to deviate

Accurately predicting local ranges of isotopic signatures in human populations is essential for answering questions about past migrations and mobility. While local ranges of δ18O can be estimated using modern baseline samples and precipitation models, there are many environmental and anthropogenic drivers that can cause these ranges to deviate from the ranges seen in human populations. This study performs a geostatistical meta-analysis on a large dataset (n = 1,370) of spatially contextualized archaeological δ18O samples from 30 publications in order to generate a predictive model of local human δ18O ranges in the Central Andes. Two models were generated, one using archaeological samples of both humans and fauna, and the other using only humans. The model using only human samples makes more accurate predictions, cautioning against the incorporation of faunal δ18O samples in studies of human provenance. The models are also compared against a model of δ18O values found in precipitation across the study area, and significant differences lead to the conclusion that precipitation models are insufficient for predicting local human δ18O ranges.
ContributorsHatley, Camden Miller (Author) / Knudson, Kelly (Thesis director) / Scaffidi, Beth (Committee member) / School of Earth and Space Exploration (Contributor) / School of Human Evolution & Social Change (Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
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Description
This study evaluates medical pluralism among 1.5 generation Indian American immigrants. 1.5 generation Indian Americans (N=16) were surveyed regarding their engagement in complementary and alternative medical systems (CAM), how immigration affected that, and reasons for and for not continuing the use of CAM. Results indicated most 1.5 Indian immigrants currently

This study evaluates medical pluralism among 1.5 generation Indian American immigrants. 1.5 generation Indian Americans (N=16) were surveyed regarding their engagement in complementary and alternative medical systems (CAM), how immigration affected that, and reasons for and for not continuing the use of CAM. Results indicated most 1.5 Indian immigrants currently engage in CAM, given that their parents also engage in CAM. The top reasons respondents indicated continued engagement in CAM was that it has no side effects and is preventative. Reasons for not practicing CAM included feeling out of place, not living with parents or not believing in CAM. After immigration, most participants decreased or stopped their engagement in CAM. More women than men continued to practice CAM after immigration. From the results, it was concluded that CAM is still important to 1.5 generation Indian immigrants.
ContributorsMurugesh, Subhiksha (Author) / Stotts, Rhian (Thesis director) / Mubayi, Anuj (Committee member) / School of Human Evolution & Social Change (Contributor) / School of Life Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2020-05
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Description
Forced pregnancy has been and remains a tactic of implementing genocide and inflicting long-lasting damage on a population. Forced marriages during the Cambodian genocide (1975-1979) and rape camps established during the Bosnian genocide (1992-1995) are two of many ways in which forced pregnancies can be implemented. This comparative study has

Forced pregnancy has been and remains a tactic of implementing genocide and inflicting long-lasting damage on a population. Forced marriages during the Cambodian genocide (1975-1979) and rape camps established during the Bosnian genocide (1992-1995) are two of many ways in which forced pregnancies can be implemented. This comparative study has identified social constructs within Bosnian and Cambodian cultures that allowed forced pregnancy to impact these populations. In the context of the Cambodian genocide, the Khmer Rouge implemented forced marriages in order to reproduce an agricultural labor force that would sustain the state of Democratic Kampuchea without foreign aid. The cultural construct of marriage promoted childbearing and sustained these marriages even after the fall of the Khmer Rouge regime. The Bosnian genocide, on the other hand, was an ethnic cleansing against Bosnian Muslims. Serbian forces established rape camps to impregnate Bosnian Muslim women in order to stigmatize them to the extent that they would (culturally) no longer be able to bear children for their own ethnic community. The cultural constructs of virginity and patrilineal descent acted as key factors in the effectiveness of forced pregnancy as a method of ethnic cleansing. While Bosnian Muslim rape camp survivors faced stigma for having been raped and for keeping their children if they chose to, Cambodian survivors would not. Cambodian women faced social expectations to stay in their marriages and keep their children in order to fulfill their duties as wives and mothers. In Bosnia, however, no social construct existed to support children born outside of marriage. In addition to these cultural constructs, various other factors influenced survivors' attitudes towards their children, including the presence of third party rapists in the Cambodian genocide and the fact that many Bosnian Muslim survivors did not know the identity of the father of their children. Comparative analysis of these two genocides has contributed to a more holistic understanding of the impacts of genocide and has informed how forced pregnancy operates across multiple cultural ideologies and lifestyles.
ContributorsVirdee, Tajinder (Author) / Holman, Christine (Thesis director) / Toth, Stephen (Committee member) / School of Human Evolution & Social Change (Contributor) / Barrett, The Honors College (Contributor)
Created2018-12
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Description
The purpose of this research study was to examine the intersection of the relationship between homelessness and mental illness, including other factors such as substance abuse. A secondary purpose of this study was to gain an awareness of service delivery models and associated funding streams for providing services to homeless

The purpose of this research study was to examine the intersection of the relationship between homelessness and mental illness, including other factors such as substance abuse. A secondary purpose of this study was to gain an awareness of service delivery models and associated funding streams for providing services to homeless persons with mental illness. A thorough literature review was conducted by the author in order to aid in answering these questions. The author also conducted interviews with 27 homeless and formerly homeless clients living in Denver who were receiving services through the Colorado Coalition for the Homeless. Finally, the author conducted 4 qualitative interviews with policy experts who worked extensively in homeless services and advocacy in the Metro-Denver area. All data was entered into an Excel workbook, and a series of graphs and tables were made to present the research results. The themes of mental illness and substance abuse were common amongst the sample population, but the most common theme was that of the lack of affordable housing available. The majority of respondents also cited involvement in the criminal justice system such as incarceration, as well as family issues as major factors in them becoming homeless. The policy experts all cited the Housing First as well as the Permanent Supportive Housing model as the most effective service delivery model for those who are both homeless and mentally-ill, and Denver is utilizing some very innovative funding streams for these service delivery models. In conclusion, the author found through both the literature review and quantitative research, that homelessness is not truly a mental illness or substance abuse issue alone, though this relationship does hold clinical importance. Homelessness is instead the result of an excessive shortage of permanent and affordable housing units across the United States.
ContributorsNelson, Hunter Lee (Author) / Shafer, Michael (Thesis director) / Ferguson-Colvin, Kristin (Committee member) / School of Community Resources and Development (Contributor) / School of Human Evolution & Social Change (Contributor) / Barrett, The Honors College (Contributor)
Created2018-12
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Description
Every minute and a half, an American is sexually assaulted (Department of Justice, 2017). After an instance of sexual assault, some victims are given the choice of having a sexual assault evidence kit (SAK) collected. These kits are designed to collect DNA evidence that will, in the best case

Every minute and a half, an American is sexually assaulted (Department of Justice, 2017). After an instance of sexual assault, some victims are given the choice of having a sexual assault evidence kit (SAK) collected. These kits are designed to collect DNA evidence that will, in the best case scenario, result in the identification of the perpetrator. If the perpetrator cannot be located, the DNA profile can still be submitted to the FBI’s CODIS databank, which houses hundreds of thousands of DNA profiles from criminal cases, and may still lead to apprehension of the rapist. Unfortunately, some SAKs experience long delays, decades even, before being tested. To date, there are hundreds of thousands of untested SAKs that remain in police custody awaiting to be submitted for forensic profiling across the country. Here, we completed a holistic investigation of sexual assault response and SAK processing in Arizona. It is important to notice that the focus of our study not only includes SAK processing and the backlog but sexual assault prevention and improving victim reporting in an effort to understand the SAK “pipeline,” from assault to prosecution.
We identified problems in three major categories that negatively impact the SAK pipeline: historical inertia, legislative and institutional limitations, and community awareness. We found that a large number of SAKs in Arizona have remained untested due insufficient funding and staffing for public crime labs making it difficult for state labs to alleviate the SAK backlog while simultaneously responding to incoming cases (“Why the Backlog Exists,” n.d.). However, surveys of ASU undergraduate students revealed a significant interest in campus assault and the SAK backlog. Based on our findings, we suggest harnessing the interest of undergraduate students and recruiting them to specialized SAK-oriented forensic technician and sexual assault nurse examiner (SANE) training at ASU with the goal of creating a workforce that will alleviate the absence of trained professionals within the country. We also explore the possibility of the creation of a private crime laboratory at ASU devoted the processing of SAKs in Arizona as a measure of alleviating the demand on local public laboratories and providing a more economic alternative to commercial laboratories. The creation of an SAK laboratory at ASU would provide undergraduates the opportunity to learn more about real forensic analysis on campus, provide a pipeline for students to become technicians themselves, and help reduce and prevent a future SAK backlog in Arizona.
ContributorsStewart, Jamie (Co-author) / Brokaw, Danielle (Co-author) / Stone, Megan (Co-author) / Kanthaswamy, Sreetharan (Thesis director) / Oldt, Robert (Committee member) / School of Human Evolution & Social Change (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
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Description
Growing hotspots of unvaccinated children corroborate with states that have highly permissive vaccination policies. State-based nonmedical exemption (NME) policies such as religious or philosophical exemptions make it easy for parents to opt out of vaccinating their children thus lowering herd immunity and increasing the risk of outbreaks. Recent studies have

Growing hotspots of unvaccinated children corroborate with states that have highly permissive vaccination policies. State-based nonmedical exemption (NME) policies such as religious or philosophical exemptions make it easy for parents to opt out of vaccinating their children thus lowering herd immunity and increasing the risk of outbreaks. Recent studies have revealed that Phoenix is the metropolitan area with the highest number of nonmedical exemptions in the country with vaccination rates below herd immunity. This thesis investigates the role of the law in enabling low vaccination rates and develops a set of policy recommendations that lawmakers may use as a tool to restore these rates to herd immunity levels. To do this, an in-depth literature review was performed and supplemented with a case study of California’s policy response to the 2014 Disneyland measles outbreak. This information was synthesized into an in-depth policy analysis addressing the political, social, practical, and economic factors of the issue and four potential policy responses for state lawmakers. Based on the analysis and California’s example, eliminating nonmedical vaccine exemptions was identified as the most effective policy option to reach the intended goal of restoring vaccination rates to herd immunity levels. This policy option is both the most cost-effective and productive in reaching herd immunity but infringes the most on parental rights and will be met with the most significant political pushback. Despite these challenges, lawmakers should take this policy step to protect our community and the most vulnerable among us.
ContributorsSaxon, Mary Elizabeth (Author) / Reddy, Swapna (Thesis director) / Speer, Matthew (Committee member) / School of Human Evolution & Social Change (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
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Description
This study examines associations between clean water, sanitation, mosquito net usage, and immune biomarkers among the Tsimane, a remote subsistence population of forager-horticulturalists with a high pathogen load. Interviews with heads of household (n=710, aged 18-92, median age 40 years) were conducted to ascertain household water sources, ownership and usage

This study examines associations between clean water, sanitation, mosquito net usage, and immune biomarkers among the Tsimane, a remote subsistence population of forager-horticulturalists with a high pathogen load. Interviews with heads of household (n=710, aged 18-92, median age 40 years) were conducted to ascertain household water sources, ownership and usage of mosquito nets, and latrine use. In this sample, 21% of households used latrines, 20% always boiled their water, and 85% used mosquito nets. Regression models estimate their associations biomarkers of pathogen exposure, including white blood cell count (WBC), hemoglobin (Hb), eosinophils, and sedimentation rate (ESR). Controlling for age, sex, and distance from the closest market town, latrine use (Std. β = -0.11, p= 0.017) and boiling water (Std. β = -0.08, p= 0.059) are associated with lower WBCs. Latrine use is marginally associated with higher hemoglobin (Std. β = 0.09, p= 0.048), but not boiling water (p= 0.447). ESR trends toward lower levels for households that always boil water (Std. β= -0.09, p= 0.131), but is not associated with latrine use (p=0.803). Latrine use was significantly associated with lower eosinophil counts (Std. β= -0.14, p=0.013), but not boiling water (p=0.240). Mosquito nets are not associated with any of these biomarkers. Both boiling water and latrine use are associated with better health outcomes in this sample. These results suggest that scarce public health resources in rural subsistence populations without malarial risk may wish to prioritize boiling water and latrine use to improve health outcomes.
ContributorsDinkel, Katelyn Aubree (Author) / Trumble, Benjamin (Thesis director) / Costa, Megan (Committee member) / Jehn, Megan (Committee member) / School of Mathematical and Statistical Sciences (Contributor) / School of Human Evolution & Social Change (Contributor) / School of Life Sciences (Contributor) / School of International Letters and Cultures (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
Forensic anthropologists rely on the validated sex determination methods that utilize post-cranial elements in adult remains, but, recently, research has been conducted to determine adult remain sex using just the skull. Similar research for sub-adult remains is lacking the robustness and validation that adult determination methods possess. This study utilized

Forensic anthropologists rely on the validated sex determination methods that utilize post-cranial elements in adult remains, but, recently, research has been conducted to determine adult remain sex using just the skull. Similar research for sub-adult remains is lacking the robustness and validation that adult determination methods possess. This study utilized 20 crania measurements taken from CT scans of child patients with known sexes at the Phoenix Children’s Hospital to investigate if a sex determination method could be produced. The measurements were assessed with a t-Test, Linear Discriminant Analysis, and Principle Component Analysis to determine if sexual dimorphism was detectable and if the predictive model had discriminant power when the sample size was categorized by age. The results revealed that a few measurements were dimorphic, but were not statistically significant to determine the sex of a sub-adult outside of the sample population. Future investigations will remove age group classification to observe if this model can predict age.
ContributorsMani, Mary Rachel (Author) / Ferry, Lara (Thesis director) / Falsetti, Anthony (Committee member) / School of Mathematical and Natural Sciences (Contributor) / School of Human Evolution & Social Change (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
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Description
The purpose of this study was to examine the lasting effects of repealed discriminatory laws on African Americans' college attendance rates and experiences. It examined the way that laws that targeted African Americans specifically created a lasting environment long after being declared unconstitutional. These persist to this day and affect

The purpose of this study was to examine the lasting effects of repealed discriminatory laws on African Americans' college attendance rates and experiences. It examined the way that laws that targeted African Americans specifically created a lasting environment long after being declared unconstitutional. These persist to this day and affect their ability to attend higher education. To study the long reaching effects of these laws, I conducted semi-structured interviews with African-Americans, some of whom attended higher education, while others did not. Common important themes were identified through these interviews, including: Environmental and Institutional Factors, Support Systems, and Role Models, the dynamics of which showed lasting effects attributable to discriminatory laws.
ContributorsWest, Myles (Author) / Gaughan, Monica (Thesis director) / McGuire, Keon (Committee member) / Economics Program in CLAS (Contributor) / School of Human Evolution & Social Change (Contributor) / Barrett, The Honors College (Contributor)
Created2018-12