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Articles 1 - 18 of 18
Full-Text Articles in Engineering
Benign Paroxysmal Positional Vertigo Predictive Diagnosis From Patient-Facing Survey, Taiwo Fasae
Benign Paroxysmal Positional Vertigo Predictive Diagnosis From Patient-Facing Survey, Taiwo Fasae
Master's Theses (2009 -)
Benign Paroxysmal Positional Vertigo (BPPV) is a leading cause of dizziness and imbalance that is responsible for one-third of fall incidents. Diagnosis, however, is ridden with uncertainties and errors. This thesis explores various techniques for BPPV predictive diagnosis from a survey study and proposes measures for predictive performance improvement. Patient-facing surveys are established ways of acquiring medical history in clinical settings and, as this thesis demonstrates, are capable of conveying patterns distinguishable for accurate diagnosis. This work begins by discussing BPPV and vestibular disorders in general, and the risks associated with misdiagnosis or elusive diagnosis. Innovative efforts by medical professionals …
An Investigation Of The Effect Of Trunk Musculature On The Lumbar Spine Injury During A High-Speed Frontal Central Crash, Nan Lin
Master's Theses (2009 -)
Motor vehicle crashes have been a leading cause of fatalities and injuries worldwide. Owing to new protection systems, the occurrence of injuries has been decreasing in recent years. On the contrary, the incidence of lumbar spine injuries in frontal crashes has been increasing as a function of the vehicle model year. However, only a few studies focused on lumbar spine injuries in vehicle crashes. Therefore, the mechanism of lumbar spine injuries has not been understood thoroughly. Muscle contraction is one of the factors that influence the risk of lumbar spine injuries as occupants tend to brace their muscles during a …
Organ Segmentation Of Pediatric Computed Tomography (Ct) With Generative Adversarial Networks, Chi Nok Enoch Kan
Organ Segmentation Of Pediatric Computed Tomography (Ct) With Generative Adversarial Networks, Chi Nok Enoch Kan
Master's Theses (2009 -)
Accurately segmenting organs in abdominal computed tomography (CT) is crucial for many clinical applications such as organ-specific dose estimation. With the recent emergence of deep learning techniques for computer vision, many powerful frameworks are proposed for organ segmentation in abdominal CT images. A major problem with these state-of-the-art methods is that they depend on large amounts of training data to achieve high segmentation accuracy. Pediatric abdominal CTs are particularly hard to obtain since these children are much more sensitive to ionizing radiation than adults. It is extremely challenging to train automatic segmentation algorithms on pediatric CT volumes. To address these …
Aerial Imaging Riverflow System Using Optical Flow, Jamir Shariar Jyoti
Aerial Imaging Riverflow System Using Optical Flow, Jamir Shariar Jyoti
Master's Theses (2009 -)
Watershed models of extreme flooding events require accurate and reliablemeasurements of streamflow for calibration and validation. However, flow rate measurements during floods are inherently uncertain, and physical measurements of velocity during flood conditions are prohibitive in many cases. Therefore, novel methods to measure stream velocity during extreme floods must be considered. This work addresses this challenge through the development of the Aerial Imaging Riverflow System (AIRS), a novel system that utilizes drones, aerial imagery, and optical flow algorithm to measure velocity in rivers and streams. This system was applied at a case study location on the Menomonee River in Wauwatosa, …
Seasonal Hydrologic And Biogeochemical Drivers Of Nutrient Availability In Urban Green Spaces, Isabelle R. Horvath
Seasonal Hydrologic And Biogeochemical Drivers Of Nutrient Availability In Urban Green Spaces, Isabelle R. Horvath
Master's Theses (2009 -)
Humans dominate urban nutrient cycles – adding nitrogen (N) and phosphorus (P) through car exhaust, fertilizer over-use, and pet waste. N and P are transported to streams via stormwater runoff, where they create eutrophic conditions and reduced water quality. Urban green spaces, like green stormwater infrastructure (GSI), have potential to mitigate N and P pollution through retention in soils and plants. Nutrient retention is accomplished in urban green spaces through filtration, plant uptake, and biogeochemical processes. These processes are highly variable, due to the influence of varying environmental drivers, such as temperature, rainfall, soil moisture, and soil redox status. This …
Seasonal Hydrologic And Biogeochemical Drivers Of Nutrient Availability In Urban Green Spaces, Isabelle R. Horvath
Seasonal Hydrologic And Biogeochemical Drivers Of Nutrient Availability In Urban Green Spaces, Isabelle R. Horvath
Master's Theses (2009 -)
Humans dominate urban nutrient cycles – adding nitrogen (N) and phosphorus (P) through car exhaust, fertilizer over-use, and pet waste. N and P are transported to streams via stormwater runoff, where they create eutrophic conditions and reduced water quality. Urban green spaces, like green stormwater infrastructure (GSI), have potential to mitigate N and P pollution through retention in soils and plants. Nutrient retention is accomplished in urban green spaces through filtration, plant uptake, and biogeochemical processes. These processes are highly variable, due to the influence of varying environmental drivers, such as temperature, rainfall, soil moisture, and soil redox status. This …
Impact Of Sewershed Characteristics On Rainfall Derived Inflow And Infiltration, Spencer Michael Sebo
Impact Of Sewershed Characteristics On Rainfall Derived Inflow And Infiltration, Spencer Michael Sebo
Master's Theses (2009 -)
Cities rely on sewer systems to transport wastewater and stormwater, but sometimes these systems are overwhelmed, and their capacity is exceeded due to excess water in the system from rainfall derived inflow and infiltration. This can lead to overflows and backups that can be detrimental to health and property. Excess water from rainfall derived inflow and infiltration enters a sewer system through a multitude of ways, including downspout connections, foundation drains, pipe joints, and broken pipes. Identifying these sources individually can be time intensive and expensive if entire service areas need to be addressed. High level screening tools are therefore …
Investigation Of Optimization Targets For Predictive Simulation Of Human Gait With Model Predictive Control, Jessica Brianne Thayer
Investigation Of Optimization Targets For Predictive Simulation Of Human Gait With Model Predictive Control, Jessica Brianne Thayer
Master's Theses (2009 -)
The design and development of gait-related treatments and devices is inhibited by anabsence of predictive gait models. Understanding of human gait and what motivates walkingpatterns is still limited, despite walking being one of the most routine human activities. While asignificant body of literature exists on gait modeling and optimization criteria to achievesimulated, normal gait, particularly with neuromuscular models, few studies have aimed to applyoptimization targets which approximate metabolic cost to mechanical gait models. Even fewerhave attempted this predictively, with no joint angle data specified a priori. The Sunmodel [31], [32] is one such …
Determining The Correlation Between Plantar Pressure And Joint Kinematics While Running, Fadumo Khalid Mohamud
Determining The Correlation Between Plantar Pressure And Joint Kinematics While Running, Fadumo Khalid Mohamud
Master's Theses (2009 -)
Running provides many health benefits, but there is a risk for lower extremity injuries. Previous studies have performed simultaneous assessments of plantar pressure and joint kinematics; however, they have not investigated correlations between these parameters. The goal of this study was to assess correlations between joint kinematics and plantar pressure metrics during the stance phase.Fifteen female and eleven male recreational runners ran ten trials in this study. The joint kinematics were measured using the Vicon MX system and plantar pressure metrics were measured with the Quasar pressure treadmill. Spearman rho correlation tests were performed to determine correlations between joint …
A Parametric Study Of Cohesive Zone Modeling Applied To Interfaces Under High Impact Velocity Collisions, Tamanna Tasnim
A Parametric Study Of Cohesive Zone Modeling Applied To Interfaces Under High Impact Velocity Collisions, Tamanna Tasnim
Master's Theses (2009 -)
Understanding the response of energetic materials to dynamic loading is critical for the design and safety of energetic systems. Energetic materials may contain heterogeneous microstructures, and hotspots can form at microstructural interfaces. The hotspots in these microstructures can determine if a material is safe to use. This study presents an analysis of the effect of material interfaces on the dynamic behavior of a heterogeneous sandwich structure subjected to high-velocity impacts using the cohesive zone model. The current work explores the sensitivity of a sugar-PMMA heterogeneous system to interface properties like stiffness, strength, and fracture energy both for normal and oblique …
Using Drone-Based Fully Convolutional Network For The Determination Of Construction Site Elevations, Sisi Han
Using Drone-Based Fully Convolutional Network For The Determination Of Construction Site Elevations, Sisi Han
Master's Theses (2009 -)
This thesis presents the research results of using the Fully Convolutional Network (FCN) model to densely match pixels and accurately determine elevations utilizing low-high ortho-images on a construction site. The research project has three major tasks. First, this researcher developed the FCN model to build up the relations between the reference pixels’ patches from the low-ortho-image and the target pixels’ patches from the high-ortho-image, which are approximate 2:1 scale relations. The developed FCN model has two convolutional blocks and one max-pooling layer in the middle. 286,292 samples of well-matched reference patches and target patches were collected for training the FCN …
Speeding Up Particle Filter Algorithm For Tracking Multiple Targets Using Cuda Programming, Jinhua Zhang
Speeding Up Particle Filter Algorithm For Tracking Multiple Targets Using Cuda Programming, Jinhua Zhang
Master's Theses (2009 -)
This thesis proposes to work on a parallelization method to speed up the computational runtime of the particle filter algorithm for multiple targets tracking. CUDA programming is utilized to execute the original implementation of the particle filter algorithm on GPU. The thesis provides a detailed discussion of the background information on the relevant topics. And then a presentation of the code architecture changes is followed. The detailed CUDA-based implementation is illustrated and discussed, which is followed by a discussion andcomparison of the results obtained from a series of tests.In this thesis, the introduction and description of the basic …
A Temperature Sensor For Measuring Dielectric Loss Heating In A Dielectrophoresis Device, Imtiaz Hossen
A Temperature Sensor For Measuring Dielectric Loss Heating In A Dielectrophoresis Device, Imtiaz Hossen
Master's Theses (2009 -)
Dielectrophoresis is an extensively used technique in the field of biomedical science that manipulates particles in a non-uniform electric field. One of its drawbacks is heat dissipation during the DEP operation that raises the local temperature of the DEP device. Temperature increases during dielectrophoresis (DEP) can affect the response of biological entities and ignoring the effect can mislead the result of the analysis. The heating mechanism of a DEP device is typically considered to be the result of Joule heating as bare electrodes are used in a conductive solution. However, when electrodes are insulated from the solution the presence of …
Multiscale Analysis Of Soil-Strap Interactions In Mechanically Stabilized Earth Retaining Walls, Max Willingham
Multiscale Analysis Of Soil-Strap Interactions In Mechanically Stabilized Earth Retaining Walls, Max Willingham
Master's Theses (2009 -)
A numerical pullout test was built using the discrete element method (DEM) to model and capture the pullout response of steel reinforcements and soil in mechanically stabilized earth (MSE) walls. Through numerical modeling, microscale phenomena showing aggregate behavior in response to the reinforcement can be used to gain insight into the macroscale structure. The general setup of the simulation is a steel specimen encased in a rectangular apparatus filled with particles. A normal pressure is applied to the top layer of particles while the strap is slowly removed from the box until it reaches a prescribed displacement.The simulation was …
Energy Storage Systems For Traction And Renewable Energy Applications, Hamad Abdullah Aldawsari
Energy Storage Systems For Traction And Renewable Energy Applications, Hamad Abdullah Aldawsari
Master's Theses (2009 -)
Energy storage systems are the set of technologies used to store various forms of energy, and by necessity, can be discharged. Energy storage technologies have a wide range of characteristics and specifications. Like any other technology, each type of energy storage has its pros and cons. Depending on the application, it is crucial to perform a tradeoff study between the various energy storage options to choose the optimal solution based on the key performance objectives and various aspects of those technologies. The purpose of this thesis is to present a thorough literature review of the various energy storage options highlighting …
Design, Assessment, And Comparison Of Antagonistic, Cable-Driven, Variable Stiffness Actuators, Ryan P. Moore
Design, Assessment, And Comparison Of Antagonistic, Cable-Driven, Variable Stiffness Actuators, Ryan P. Moore
Master's Theses (2009 -)
This thesis presents the designs and test results for two antagonistic, cable-driven, variable stiffness actuator designs. Each of these variable stiffness actuators is compact, has a large range of controllable stiffness, and limits the inertia at the robotic link it is controlling. Each design consists of a cable running through a set of three pulleys. Tension on the cable displaces a linear spring, which moves along a path designed to achieve quadratic spring behavior. One design uses a variable radius path to achieve the nonlinear elastic behavior while the other uses a fixed radius (lever) path.A quasi-static model of …
Monitoring Hydrologic Controls On Biogeochemical Process Variability In Green Infrastructure Soils, Laine Pulvermacher
Monitoring Hydrologic Controls On Biogeochemical Process Variability In Green Infrastructure Soils, Laine Pulvermacher
Master's Theses (2009 -)
The premise of this research was to monitor biogeochemical responses to soil moisture and soil temperature within green stormwater infrastructure soils. Adopting best management practices like green infrastructure in urban areas has the potential to remove incoming nutrients from stormwater runoff through biogeochemical processes, like plant and microbial metabolism. Biogeochemical activity has been suggested to be highly variable, so this research proposed to monitor that variability by tracking the stoichiometry of soil respiration. Additionally, an advection-diffusion-reaction model was used to disaggregate physical and biogeochemical controls on the observed soil respiration. The field data was collected to investigate the biogeochemical processes, …
Monitoring The Performance Of Green Infrastructure: Pervious Pavement And Bioretention, Elizabeth Marie Regier
Monitoring The Performance Of Green Infrastructure: Pervious Pavement And Bioretention, Elizabeth Marie Regier
Master's Theses (2009 -)
Milwaukee, like many other aging cities, struggles with combined sewer overflows, basement backups, and urban stream syndrome. It is increasingly looking to green stormwater infrastructure as a way to alleviate stormwater concerns by treating, retaining, and slowly releasing stormwater near the locations where it falls. However, green stormwater infrastructure varies in its performance, and few studies have been performed in Southeast Wisconsin. Therefore, two bioswales and a pervious pavement installation were monitored for water quantity, total nitrogen, total phosphorus, and total suspended solids. The bioswales were also monitored for dissolved phosphorus. The north bioswale reduced total phosphorus concentrations by a …