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- Creators: Arizona State University
Description
Sustainable food systems have been studied extensively in recent times and the Food-Energy-Water (FEW) nexus framework has been one of the most common frameworks used. The dissertation intends to examine and quantitatively model the food system interaction with the energy system and the water system. Traditional FEW nexus studies have focused on food production alone. While this approach is informative, it is insufficient since food is extensively traded. Various food miles studies have highlighted the extensive virtual energy and virtual water footprint of food. This highlights the need for transport, and storage needs to be considered as part of the FEW framework. The Life cycle assessment (LCA) framework is the best available option to estimate the net energy and water exchange between the food, energy, and water systems. Climate plays an important role in food production as well as food preservation. Crops are very sensitive to temperature changes and it directly impacts a crop’s productivity. Changing temperatures directly impact crop productivity, and water demand. It is important to explore the feasibility of mitigation measures to keep in check increasing agricultural water demands. Conservation technologies may be able to provide the necessary energy and water savings. Even under varying climates it might be possible to meet demand for food through trade. The complex trade network might have the capacity to compensate for the produce lost due to climate change, and hence needs to be established. Re-visualizing the FEW nexus from the consumption perspective would better inform policy on exchange of constrained resources as well as carbon footprints. This puts the FEW nexus research space a step towards recreating the FEW nexus as a network of networks, that is, FEW-e (FEW exchange) nexus.
ContributorsNatarajan, Mukunth (Author) / Chester, Mikhail Vin (Thesis advisor) / Lobo, Jose (Committee member) / Ruddell, Benjamin (Committee member) / Fraser, Andrew (Committee member) / Arizona State University (Publisher)
Created2019
Description
Carbon capture and sequestration (CCS) is one of the important mitigation options for climate change. Numerous technologies to capture carbon dioxide (CO2) are in development but currently, capture using amines is the predominant technology. When the flue gas reacts with amines (Monoethanaloamine) the CO2 is absorbed into the solution and forms an intermediate product which then releases CO2 at higher temperature. The high temperature necessary to strip CO2 is provided by steam extracted from the powerplant thus reducing the net output of the powerplant by 25% to 35%. The reduction in electricity output for the same input of coal increases the emissions factor of Nitrogen Oxides, Mercury, Particulate matter, Ammonia, Volatile organic compounds for the same unit of electricity produced. The thesis questions if this tradeoff between CO2 and other emissions is beneficial or not. Three different methodologies, Life Cycle Assessment, Valuation models and cost benefit analysis are used to identify if there is a net benefit to the society on implementation of CCS to a Pulverized coal powerplant. These methodologies include the benefits due to reduction of CO2 and the disbenefits due to the increase of other emissions. The life cycle assessment using ecoindicator'99 methodology shows the CCS is not beneficial under Hierarchical and Egalitarian perspective. The valuation model shows that the inclusion of the other emissions reduces the benefit associated with CCS. For a lower CO2 price the valuation model shows that CCS is detrimental to the environment. The cost benefit analysis shows that a CO2 price of at least $80/tCO2 is required for the cost benefit ratio to be 1. The methodology integrates Montecarlo simulation to characterize the uncertainties associated with the valuation models.
ContributorsSekar, Ashok (Author) / Williams, Eric (Thesis advisor) / Chester, Mikhail Vin (Thesis advisor) / Allenby, Braden (Committee member) / Arizona State University (Publisher)
Created2012
Description
The yeast project studies the growth of yeast Saccharomyces Cerevisiae (S. Cerevisiae) in high and low sulfate environments and analyzes the potential for genetically mutated plasmids to facilitate sulfate uptake in gene deficient yeast medias. The goal of the project was to transform the Sul1 and Sul2 transporters into the nutrient deficient yeast strain BY4743 and observe growth in conditions that would otherwise prohibit growth in order to create a model that can be used to study the effect of sulfate concentration on the transporters. The experimental results showed that expressing the sulfate transporters in the BY4743 strain provided the potential for the yeast to grow in nutrient-poor media. The growth potential model allows for further analysis on the sulfate transporters and will be used for research projects going forward.
ContributorsDickieson, Maxim Park (Author) / Nannenga, Brent (Thesis director) / Pena, Fred (Committee member) / Ira A. Fulton School of Engineering (Contributor) / Chemical Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
This research paper explores the integration of Vehicle-to-Grid (V2G) technology in Phoenix, Arizona, highlighting its potential to alleviate the pressures placed on the electrical grid which are made worse by increasing temperatures. The analysis focuses on the relationships between summer temperatures, reliability of the power grid, and the adoption of electric vehicles (EVs) equipped with bidirectional charging capabilities. Given Arizona’s vulnerability to extreme heat and the significant demand for cooling, this paper employs scenario planning to assess three potential futures for the summer of 2030. The scenarios range from the optimistic best-case scenario, where EV adoption and public awareness are on the rise, to the worst-case scenario which is characterized by stagnant EV adoption rates and decreased grid reliability. The findings suggest that while V2G technology has the potential to provide essential backup power during outages, its effectiveness is contingent upon increased public awareness and supportive regulations.
ContributorsZook, Juliana (Author) / Ira A. Fulton School of Engineering (Issuing body) / Arizona State University (Sponsor)
Created2025-04
ContributorsMartinez, Deb Heim (Author) / O'Flaherty, Rachael (Author) / Pinkerton, Tanya (Author) / Thompson, Nicole (Author) / Arizona State University. Learning Futures Collaboratives. Global (Teacher) Education (Issuing body) / Arizona State University (Sponsor)
Created2025-02 (year and month uncertain)
ContributorsPearson, Joseph (Author) / Duvall, Jennifer (Author) / Holzer, Valerie (Author) / Blankenship, Selena (Author) / Moreland University (Issuing body) / American Association of School Personnel Administrators (Sponsor) / Arizona State University. Learning Futures Collaboratives. Global (Teacher) Education (Contributor) / Arizona State University (Sponsor)
Created2024-10 (year and month uncertain)
ContributorsO'Flaherty, Rachael (Author) / Pinkerton, Tanya (Author) / Martinez, Deb Heim (Author) / Arizona State University. Learning Futures Collaboratives. Global (Teacher) Education (Issuing body) / Arizona State University (Sponsor)
Created2025-01 (year and month uncertain)
Description
In this episode EALA is joined by Kathy Hoffman, the Executive Director of Innovation & Special Education Initiatives at Arizona State University, and Co Leader behind Project OASIS. Listen in as we discuss how Project Oasis is ensuring all learners, particularly students with learning differences, have access to the opportunities they need to have lifelong success.
ContributorsHoffman, Kathy (Interviewee) / Arizona State University. Learning Futures Collaboratives. Project OASIS. (Issuing body) / Arizona State University (Sponsor)
Created2024
ContributorsO'Flaherty, Rachael (Host) / Pinkerton, Tanya (Host) / Nave, Lillian (Panelist) / Farahat, Enas (Panelist) / Boozer, April (Panelist) / Arizona State University. Learning Futures Collaboratives. Global (Teacher) Education (Issuing body) / Arizona State University (Sponsor)
Created2025 (year uncertain)
Description
The webinar series, EMI in the Global South: Dialogic Perspectives, explored the complexities and contextual nuances of English as the Medium of Instruction across three countries in the Global South. This series fostered inclusive dialogic amongst educators to share successes and lessons learned about the effective use of English as the medium of instruction in contexts where English is not the home language.
ContributorsArizona State University. Learning Futures Collaboratives. Global (Teacher) Education (Issuing body) / Arizona State University (Sponsor)
Created2024 to open end