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- Creators: Brahms, Johannes, 1833-1897
ContributorsBrahms, Johannes, 1833-1897 (Composer)
ContributorsBrahms, Johannes, 1833-1897 (Composer)
ContributorsBrahms, Johannes, 1833-1897 (Composer)
ContributorsBrahms, Johannes, 1833-1897 (Composer)
Description
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
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 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
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 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
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 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
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 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