Browsing by Subject "Engineering"
Now showing items 1-20 of 95
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A Modular Multilevel Series/Parallel Converter for a Wide Frequency Range Operation
(IEEE Transactions on Power Electronics, 2019-10-01)When providing ac output, modular multilevel converters (MMCs) experience power fluctuation in the phase arms. The power fluctuation causes voltage ripple on the module capacitors, which grows with the output power and inversely ... -
A New Approach to Model Order Reduction of the Navier-Stokes Equations
(2012)A new method of stabilizing low-order, proper orthogonal decomposition based reduced-order models of the Navier Stokes equations is proposed. Unlike traditional approaches, this method does not rely on empirical turbulence ... -
A New Method for Modeling Free Surface Flows and Fluid-structure Interaction with Ocean Applications
(2016)The computational modeling of ocean waves and ocean-faring devices poses numerous challenges. Among these are the need to stably and accurately represent both the fluid-fluid interface between water and air as well as the ... -
A Novel Integrated Biotrickling Filter -Anammox Bioreactor System for the Complete Treatment of Ammonia in Air with Nitrification and Denitrification
(2020)An integrated biotrickling filter (BTF)-Anammox bioreactor system was established for the complete treatment of ammonia. Shortcut nitrification process was successfully achieved in the biotrickling filter through free ammonia ... -
Accelerated Sepsis Diagnosis by Seamless Integration of Nucleic Acid Purification and Detection
(2014)<bold>Background</bold> The diagnosis of sepsis is challenging because the infection can be caused by more than 50 species of pathogens that might exist in the bloodstream in very low concentrations, e.g., less ... -
Acoustics-induced Fluid Motions
(2021)Acoustic waves, as a form of mechanical vibration, not only induces the force directly on the object, but also induces the motion of the medium that propagates throughout the system. The study of acoustofluidic mainly focuses ... -
Acoustofluidic Innovations for Cellular Processing On-Chip
(2018)The advent of increasingly proficient cell handling tools has led to a drastic maturation of our understanding of life on the microscale. Thus far, impressive strides have been made towards creating efficient and compact ... -
An Econophysics Approach to Short Time-Scale Dynamics of the Equities Markets
(2017)Financial markets have evolved drastically over the last decade due to the advent of high frequency trading and ubiquitous influence of algorithmic trading. Analyzing the equities markets has become an extremely data intensive ... -
An Empirically Based Stochastic Turbulence Simulator with Temporal Coherence for Wind Energy Applications
(2016)In this dissertation, we develop a novel methodology for characterizing and simulating nonstationary, full-field, stochastic turbulent wind fields. In this new method, nonstationarity is characterized and modeled via temporal ... -
An Induced Pluripotent Stem Cell-derived Tissue Engineered Blood Vessel Model of Hutchinson-Gilford Progeria Syndrome for Disease Modeling and Drug Testing
(2018)Hutchison-Gilford Progeria Syndrome (HGPS) is a rare, accelerated aging disorder caused by nuclear accumulation of progerin, an altered form of the Lamin A gene. The primary causes of death are stroke and cardiovascular ... -
An Information-driven Approach for Sensor Path Planning
(2011)This thesis addresses the problem of information-driven sensor path planning for the purpose of target detection, measurement, and classification using non-holonomic mobile sensor agents (MSAs). Each MSA is equipped with ... -
Antisense Gene Silencing and Bacteriophages as Novel Disinfection Processes for Engineered Systems
(2014)The growth and proliferation of invasive bacteria in engineered systems is an ongoing problem. While there are a variety of physical and chemical processes to remove and inactivate bacterial pathogens, there are many situations ... -
Application of Numerical Methods to Study Arrangement and Fracture of Lithium-Ion Microstructure
(2016)The focus of this work is to develop and employ numerical methods that provide characterization of granular microstructures, dynamic fragmentation of brittle materials, and dynamic fracture of three-dimensional bodies.We ... -
Application of Stochastic Processes in Nonparametric Bayes
(2014)This thesis presents theoretical studies of some stochastic processes and their appli- cations in the Bayesian nonparametric methods. The stochastic processes discussed in the thesis are mainly the ones with independent ... -
Assessing the Injury Tolerance of the Human Spine
(2017)Chronic and acute back injuries are widespread, affecting people in environments where they are exposed to vibration and repeated shock. These issues have been widely reported among personnel on aircraft and small watercraft; ... -
Association of pre-treatment radiomic features with lung cancer recurrence following stereotactic body radiation therapy.
(Physics in medicine and biology, 2019-01-08)The purpose of this work was to investigate the potential relationship between radiomic features extracted from pre-treatment x-ray CT images and clinical outcomes following stereotactic body radiation therapy (SBRT) for ... -
Automatic Behavioral Analysis from Faces and Applications to Risk Marker Quantification for Autism
(2018)This dissertation presents novel methods for behavioral analysis with a focus on early risk marker identification for autism. We present current contributions including a method for pose-invariant facial expression recognition, ... -
Automatic Identification of Training & Testing Data for Buried Threat Detection using Ground Penetrating Radar
(2017)Ground penetrating radar (GPR) is one of the most popular and successful sensing modalities that has been investigated for landmine and subsurface threat detection. The radar is attached to front of a vehicle and collects ... -
Belief Propagation with Deep Unfolding for High-dimensional Inference in Communication Systems
(2019)High-dimensional probability distributions are important objects in a wide variety of applications for example, most prediction and inference applications focus on computing the posterior marginal of a subset of variables ... -
Bioelectricity: A Quantitative Approach Duke University’s First MOOC
(2013-02-05)In Fall 2012, after only three months for planning and development, Duke University and Dr. Roger Barr successfully delivered a challenging open online course via Coursera to thousands of students around the world. This ...
