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  • Properties of hydrogels for immobilization of bacteria in a commercial microfluidic dioreactor

    Creator:
    Weymann, Davis
    Abstract:
    Current technological shortcomings limit the economic viability of capturing and utilizing small sources of methane. The development of a reactor to overcome these limitations would unlock economic opportunity and incentivize reduced methane emissions. A microfluidic bioreactor containing immobilized methanotrophs has the potential to overcome these limitations by profitably converting small...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: ______________________________________________________ Karl F. Schilke Current

  • Integrating sustainable manufacturing assessment into decision making for a production work cell

    Creator:
    Zhang, Hao
    Abstract:
    Sustainability has been the focus of intense discussions over the past two decades, with topics around the entire product life cycle. In the manufacturing phase, research has been focused solely on environmental impact assessment or environmental impact and cost analysis in its assessment of sustainability. However, few efforts have investigated...
    Resource Type:
    Masters Thesis
    Full Text:
    : ________________________________________________________________ Karl R. Haapala Sustainability has been the focus of intense discussions over the past two

  • Immobilization of Methylosinus trichosporium OB3b in a Biolamina Plate Reactor for the Oxidation of Methane to Methanol

    Creator:
    Fuchs, Brian K.
    Abstract:
    Methane is a flammable gas that is the main component of natural gas. It is a highly potent greenhouse gas, and accounts for about 20% of greenhouse gas emissions. Methane is routinely flared in many industrial processes without harnessing any of its energy. The environmental impact and wasted energy potential...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Karl F. Schilke Methane is a flammable gas that is the main component of natural gas

  • A framework for integrating systems thinking into sustainable manufacturing

    Creator:
    Zhang, Hao
    Abstract:
    Improving the understanding the relations of sustainability behaviors in manufacturing systems and actively engaging with manufacturers (especially SMEs) in sustainability efforts is key to the long-term success of U.S. industry and the natural environment. This study addresses this urgent need by establishing a systemic approach for the design of costing...
    Resource Type:
    Dissertation
    Full Text:
    approved: ________________________________________________________________ Karl R. Haapala

  • DC bus capacitor discharge of permanent magnet synchronous machine drive systems for hybrid/electric vehicles

    Creator:
    Jin, Lei
    Abstract:
    Permanent magnet synchronous machines (PMSMs) are widely used in electric vehicles and hybrid electric vehicles to propel the wheels. Various control strategies have been developed for PMSM drive systems to achieve both high efficiency and safe operation. In a PMSM drive system, generally the high voltage battery and the power...
    Resource Type:
    Masters Thesis
    Full Text:
    and Dr. Karl R. Haapala for being part of my committee. I would like to thank Mike Starrett, Han

  • Design and manufacturing study of hydroelectric turbines using recycled and natural fiber composites

    Creator:
    Whitehead, Marc
    Abstract:
    The objective of this project is to demonstrate the feasibility fiber-reinforced turbine components through a design and manufacturing study. The motivation for using composites is to reduce weight and simplify manufacturing especially at high production volumes. In addition, natural fiber composites are implemented for applicable components to reduce environmental impact....
    Resource Type:
    Masters Thesis

  • Sustainable building design framework : an integrated approach

    Creator:
    Piacenza, Joseph R.
    Abstract:
    This paper combines two research publications working toward the development of an integrated framework for commercial sustainable building design. Current methodologies utilize a traditional architectural top-down approach to sustainable building design practices that consumes financial and temporal resources early in the design process. By identifying the array mechanical subsystems required...
    Resource Type:
    Masters Thesis

  • Problems of Shape and Information in Multiscale Modeling of Transport Phenomena

    Creator:
    Ostvar, Sassan
    Abstract:
    This work is a compilation of problems that deal with multiscale analysis of transport phenomena in environmental systems. A common feature among the problems studied here is the presence of non-negligible microscale structure in various forms. Each problem is approached from the perspective that a macroscopic observable encodes aspects of...
    Resource Type:
    Dissertation

  • Phosphorus physiology and environmental forcing of oceanic cyanobacteria, primarily Trichodesmium spp.

    Creator:
    White, Angelicque E.
    Abstract:
    The biological transformation of dinitrogen gas (N2) into combined forms(termed N2 fixation) by certain genera of oceanic cyanobacteria represents the largest incoming flux of nitrogen to the global ocean. As such, biological nitrogen fixation plays a significant role in the regulation of oceanic productivity and the export of carbon and...
    Resource Type:
    Dissertation
    Full Text:
    guided conversations with my formal and informal advisors, Ricardo Letelier, Yvette Spitz and Dave Karl

  • Seconds to hour scale photosynthetic responses in marine microalgae

    Creator:
    Laney, Samuel R.
    Abstract:
    Our view of phytoplankton has historically revolved around their inability to control their location in space. The term phytoplankton itself underscores this particular difference between phytoplankton and their sessile terrestrial counterparts. Yet there are other differences between land plants and the phytoplankton that are perhaps equally important, beyond this sessile-planktonic...
    Resource Type:
    Dissertation
    Full Text:
    ship has always been smooth and easy. • Similarly, thanks to Dave Karl and the HOT program, for