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Articles 1711 - 1715 of 1715
Full-Text Articles in Engineering
Addressing Computational Complexity Of Electromagnetic Systems Using Parameterized Model Order Reduction, Majid Ahmadloo
Addressing Computational Complexity Of Electromagnetic Systems Using Parameterized Model Order Reduction, Majid Ahmadloo
Electronic Thesis and Dissertation Repository
As operating frequencies increase, full wave numerical techniques such as the finite element method (FEM) become necessary for the analysis of high-frequency and microwave circuit structures. However, the FEM formulation of microwave circuits often results in very large systems of equations which are computationally expensive to solve. The objective of this thesis is to develop new parameterized model order eduction (MOR) techniques to minimize the computational complexity of microwave circuits. MOR techniques provide a mechanism to generate reduced order models from the detailed description of the original FEM formulation. The following contributions are made in this thesis:
1. The first …
Controlled Delivery Of Serp-1 Protein From Poly(Vinyl Alcohol) Hydrogel, Karen L. Kennedy
Controlled Delivery Of Serp-1 Protein From Poly(Vinyl Alcohol) Hydrogel, Karen L. Kennedy
Electronic Thesis and Dissertation Repository
Poly(vinyl alcohol) (PVA) was selected and evaluated as a controlled drug delivery matrix for Serp-1, a potential new therapeutic with anti-inflammatory properties for control of restenosis. PVA hydrogels, containing a high water content, can be formed by physical crosslinking via a process involving freezing and thawing the material in multiple cycles. PVA, being a well known biomaterial, is suited for biomedical applications and the high water content and hydrophilicity provides a friendly environment for the delivery of large protein based drugs. Using bovine serum albumin (BSA) as a model protein, the controlled release properties of PVA were investigated. Release profiles …
Virtual And Augmented Reality Techniques For Minimally Invasive Cardiac Interventions: Concept, Design, Evaluation And Pre-Clinical Implementation, Cristian A. Linte
Virtual And Augmented Reality Techniques For Minimally Invasive Cardiac Interventions: Concept, Design, Evaluation And Pre-Clinical Implementation, Cristian A. Linte
Electronic Thesis and Dissertation Repository
While less invasive techniques have been employed for some procedures, most intracardiac interventions are still performed under cardiopulmonary bypass, on the drained, arrested heart. The progress toward off-pump intracardiac interventions has been hampered by the lack of adequate visualization inside the beating heart.
This thesis describes the development, assessment, and pre-clinical implementation of a mixed reality environment that integrates pre-operative imaging and modeling with surgical tracking technologies and real-time ultrasound imaging. The intra-operative echo images are augmented with pre-operative representations of the cardiac anatomy and virtual models of the delivery instruments tracked in real time using magnetic tracking technologies. As …
The Effect Of Particle Size On Hydrolysis And Modeling Of Anaerobic Digestion, Saad Aldin
The Effect Of Particle Size On Hydrolysis And Modeling Of Anaerobic Digestion, Saad Aldin
Electronic Thesis and Dissertation Repository
Batch experiments were performed to investigate the effect of particulate protein particle size on the hydrolysis of casein in anaerobic degradation. While particle size did not affect the ultimate protein degradation efficiency, the hydrolysis rate coefficient increased from 0.034 to 0.298 d-1 with the change in specific surface area from 0.01 to 0.192 m2/g. The maximum methane production rate was affected by the particle size change, although the ultimate amount of methane produced was approximately the same despite the change in specific surface area. A mathematical relationship between the hydrolysis rate coefficient and specific surface area was developed and a …
Catalytic Steam Gasification Of Biomass Surrogates: A Thermodynamic And Kinetic Approach, Enrique Salaices
Catalytic Steam Gasification Of Biomass Surrogates: A Thermodynamic And Kinetic Approach, Enrique Salaices
Electronic Thesis and Dissertation Repository
Gasification of biomass is an environmentally important technology that offers an alternative to the direct use of fossil fuel energy. Steam gasification is getting increased attention as a potential source of renewable energy since it produces a gaseous fuel suitable for industrial applications in highly efficiently power/heat energy production, transport fuel, and as a feedstock for chemical synthesis. Furthermore, catalytic steam gasification has other advantages hence (i) it produces a gas with higher heating value; (ii) it reduces the diluting effect of N2 from air; (iii) it eliminates the need of cleaning, upgrading and/or conditioning the product gas for certain …