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Full-Text Articles in Engineering
Bench-Scale Assessment Of Low Pressure Membrane Fouling: Characterization And Examination The Role Of Organic Nitrogen Compounds, Anh Hai Nguyen
Bench-Scale Assessment Of Low Pressure Membrane Fouling: Characterization And Examination The Role Of Organic Nitrogen Compounds, Anh Hai Nguyen
Open Access Dissertations
The primary goal of this research was to improve understanding of the fouling of low pressure hollow fiber membranes used in drinking water treatment. The major difference of this study compared to other reported studies was the use of a hollow fiber membrane module at operating conditions mimicking those of full-scale practice. Two poly(vinylidene-fluoroethylene) based hollow fiber membranes (A and B) were tested. Different types of fouling indices (total, hydraulic irreversible, chemical irreversible) developed based on a resistance in series model were used to assess membrane performance. Data from bench-scale and full-scale plants were compared to validate the use of …
Stochastic Modeling Of The Equilibrium Speed-Density Relationship, Haizhong Wang
Stochastic Modeling Of The Equilibrium Speed-Density Relationship, Haizhong Wang
Open Access Dissertations
Fundamental diagram, a graphical representation of the relation among traffic flow, speed, and density, has been the foundation of traffic flow theory and transportation engineering for many years. For example, the analysis of traffic dynamics relies on input from this fundamental diagram to find when and where congestion builds up and how it dissipates; traffic engineers use a fundamental diagram to determine how well a highway facility serves its users and how to plan for new facilities in case of capacity expansion. Underlying a fundamental diagram is the relation between traffic speed and density which roughly corresponds to drivers’ speed …
Evaluating Alternative Public-Private Partnership Strategies For Existing Toll Roads: Toward The Development Of A Decision Support System, Christopher John Ahmadjian
Evaluating Alternative Public-Private Partnership Strategies For Existing Toll Roads: Toward The Development Of A Decision Support System, Christopher John Ahmadjian
Open Access Dissertations
Many claim that, with regard to transportation infrastructure, only partnerships between public and private entities, which draw on the strengths of both, can achieve the goals of enhancing operational efficiency, increasing service delivery, improving asset maintenance, and stretching scarce federal, state, and local tax dollars. While some completed public-private partnership (P3) agreements on existing toll roads in the United States have seen a measure of success, others have raised critical questions pertaining to the true costs and benefits associated with these agreements for all stakeholders. Of particular concern is an apparent reliance on monetary calculations alone to determine toll road …