Life Sciences Commons^™

Design And Plan Of A Modified Hydroponic Shipping Container For Research, John A. Houtman

Open Access Theses

As the world’s population continues to increase, food production will need to increase in order to meet the predicted rise in food demand. However, with increased pressure on cropland available from environmental effects and urbanization, new innovative methods of crop production need to be researched in order to increase agricultural production with limited land. This research focuses on the design of a single form of urban agriculture that is considered Zfarming and has the potential to produce quality urban agricultural produce through ground-based measures. This project produced detailed step-by-step analysis of the design process, develop variability within the modified hydroponic …

Extended Scaffolding: A More General Theory Of Scaffolded Cognition, Zachary R. Murphy

Open Access Theses

New and emerging technologies called neuroprostheses are challenging our ideas about where one's mind ends and the environment begins. Cochlear implants, which completely replace the functioning of the inner ear, are now a common treatment for deafness. Berger et al. developed a device that replaces long-term memory in rats (2012), while Hampson et al. created a brain-machine interface that converts a desire to move one's arm into the motor neuron impulses required to achieve that movement (2013)--both offering promising treatments for dementia, Alzheimer's disease, and paralysis. Deep brain stimulation is now a common way of regulating neural activity to manage …

Assessing The Spatial Variability Of Soils In Uganda, Joshua Okach Minai

Open Access Theses

Uganda's soils were once considered the most fertile in Africa, but soil erosion and soil nutrient mining have led to soil degradation and declining agricultural productivity. Lack of environmental awareness among farmers, traditional agricultural practices, minimal inorganic fertilizer use, and little to no use of improved crop varieties all contribute to continued soil degradation. The objectives of this study were: (1) to characterize the spatial distribution of selected physical and chemical soil properties in Uganda on a national scale utilizing the data collected by Nkonya et al. (2008), and (2) to identify the major factors and processes that are dominant …

Socio-Economic Factors Associated With The Adoption Of Conservation Agriculture Among Women Farmers In Balaka District, Malawi, Chimwemwe M. Chisenga

Open Access Theses

The study was conducted in Balaka District, Malawi among women farmers. The study focused on three research questions: What socio-economic factors are associated with the rate of adoption of conservation agriculture among women farmers in Balaka District, Malawi? What are the levels of adoption of conservation agriculture among women farmers in Balaka District, Malawi? What are the main sources of information for conservation agriculture among women farmers in Balaka District, Malawi that lead to adoption of CA? Quantitative data were collected using a door-to-door survey. The survey was verbally administered to 60 women farmers. ^ Qualitative data were collected through …

Analyzing The Importance Of Diversifying Beyond Tobacco For Small-Scale Farmers In Malawi, Mphatso Charity Mbulukwa

Open Access Theses

This thesis analyses potential agricultural alternatives to production and marketing of tobacco in Malawi. I study existing patterns of crop and income diversification and factors that limit crop diversification. I also provide an analysis of the current profitability of different important cash crop alternatives that are commonly grown among smallholder farmers and compare their profitability to that of tobacco.

Following a review and synthesis of available literature on alternatives to tobacco, analysis is presented that relies upon data collected in 2009 from 380 households in Kasungu and Machinga districts of Malawi. Simpsons Index of diversification was used to measure the …

Market Power Estimation In The Chilean Cattle Market, Rodirgo A. Vasquez Panizza

Open Access Theses

The cattle market in Chile is constituted by cattle slaughtering firms and farmers; the industry demands cattle but also demands beef imports. Based in antecedents of market concentration in this sector, I make a system of equations model based on the NEIO approach to determine market power for the period April 1993 - December 2008. The results show that there is no market power in the aggregated market as well as in the disaggregated market by sex and age type, which is explained because the special features of this market in Chile.

An Exploratory Study Of Diversified Mentoring Relationships Among Graduate Students And Their Advisors In Science, Technology, Engineering, And Mathematics Fields, Krystin R. Bodden

Open Access Theses

Minorities and women continue to be underrepresented in science, technology, engineering, and mathematics (STEM) fields. In graduate education, factors such as racism, prejudice, discrimination, sexism, stereotypes, tokenism, and a lack of role models can all plague students and contribute to uncompleted degrees and non-entrance into STEM fields. One of the tools being used to combat these barriers is effective mentoring. Graduate students and their advisors generally have close working relationships and advisors serve in a tremendously important role in the development of the graduate student, so an effective mentoring relationship is vital.

The purpose of this study was to explore …

An Exploratory Analysis Of Fruit And Vegetable Consumption In Black Men, Jacqueline Reiter

Open Access Theses

Objective: Multiple peer-reviewed studies have found an association between fruit and vegetable consumption and lower risk for diseases such as hypertension, stroke and cancer. In other related studies, education level, retail food environment, and fruit and vegetable consumption were also examined together to discover patterns and associations. Currently, Black males have a higher risk for poor health outcomes. Limited research has focused specifically on Black men's fruit and vegetable consumption. This study explored the association between education level, food store access (measured by proximity) and fruit and vegetable consumption in black African American men.

Design: The data for this study …