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A Mathematical Model For Population Dynamics Of Antibiotic Treatment, Siyu Tian

Mathematics Theses

The objective of the thesis is to model the behavior of the reaction between two species of bacteria and antibiotics by building an ordinary differential equation (ODE) system under a list of assumptions. With the ODE, we analyze equilibrium points and the stability of these equilibrium points to forecast the trend of each species of bacteria and antibiotics. We test the validity of the model assumptions. Based on these outcomes, we show that: 1. Both equilibrium points and eigenvalues differ in orders of magnitude. 2. Some figures which were generated using different initial values do not make any sense. 3. …

Using An Educational Module And Simulation Learning Experience To Improve Medication Safety, Barbara Lynn Durham

Doctor of Nursing Practice (DNP) Projects

The purpose of this evidence-based change in practice project was to provide nurses with an experiential learning opportunity, using simulation, to identify and report near miss events during the medication administration process related to patient-controlled analgesia (PCA) usage. Despite extensive in-service training on a Medical/Surgical (Med/Surg) floor in an acute care hospital, inconsistent, inaccurate and incomplete documentation with use of the new PCA pumps continued to be problematic. A conceptual framework of just culture was used with the quality improvement method of the Plan-Do-Study-Act (PDSA) cycle for testing change. Medication safety education was a valid andragogical strategy to decrease rates …

Using Video Simulation To Enhance Rn-Pca Communication, Boris Chang

Master's Projects and Capstones

The purpose of this project was to develop a video simulation exercise to enhance communication between Registered Nurses (RNs) and Patient Care Assistants (PCAs). From a general microsystem assessment initially performed on an urban hospital medical-surgical unit, 75% of respondents noted that the most pertinent issue to address was improving communication between RNs and PCAs. Literature review of evidence-based practices found several studies that support the use of human clinical simulation to promote teamwork and interdisciplinary communication. RNs (n = 24) and PCAs (n = 9) were then individually interviewed with surveys and responses scored based on the …

Specimen Labeling Improvement Project: Slip, Traci Hoiting

Doctor of Nursing Practice (DNP) Projects

Blood specimens are labeled at the time of acquisition in order to identify and match the specimen, label, and order to the patient. While the labeling process is not new, it is frequently laden with errors (Brown, Smith, & Sherfy, 2011). Wrong blood in tube (WBIT) poses significant risk. Multiple factors contribute to mislabeling errors, including lax policies, limited technological solutions, decentralized labeling processes, multi-tasking, distraction from the clinician, and insufficient education and training of staff. To reduce blood specimen labeling errors, a large academic medical center implemented an innovative technological solution for specimen labeling that integrates patient identification, physician …

Anesthesia Clinical Core Competencies And High Fidelity Human Simulation, Jeffrey Colby James

Doctoral Dissertations

The purpose of the study was to identify anesthesia clinical core competencies that are appropriate for evaluating proficiency utilizing High Fidelity Human Simulation (HFHS). This purpose was achieved by identifying the perceptions of nurse anesthesia educational program administrators and faculty regarding the anesthesia clinical core competencies that are appropriate for evaluating proficiency utilizing HFHS. Participants completed a 50-item web-based survey instrument and demographic questionnaire (Anesthesia Core Competency and Simulation Survey). High fidelity human simulation (HFHS) based evaluation of anesthesia clinical core competency proficiency can be a valuable tool for assessing anesthesia trainees, certifying nurse anesthetists, and recertifying nurse anesthetists. Evidence …

Computing Approximate Solutions To The Art Gallery Problem And Watchman Route Problem By Means Of Photon Mapping, Bruce Andrew Johnson

Doctoral Dissertations

Wireless sensor networks (WSNs) can be partitioned component sensor nodes (SNs) who are meant to operate and sense information arriving from multiple spectra in their environment. Determining where to place a single SN or multiple SNs such that the amount of information gained is maximized while the number of SNs used to gain that information is minimized is an instance of solving the art gallery problem (AGP). In order to solve the AGP, we present the Sensor Placement Optimization via Queries (SPOQ) algorithm that uses level sets populated by queries to a photon map in order to find observation points …

High Dimensional Non-Linear Optimization Of Molecular Models, Joseph C. Fogarty

USF Tampa Graduate Theses and Dissertations

Molecular models allow computer simulations to predict the microscopic properties of macroscopic systems. Molecular modeling can also provide a fully understood test system for the application of theoretical methods. The power of a model lies in the accuracy of the parameter values which govern its mathematical behavior. In this work, a new software, called ParOpt, for general high dimensional non-linear optimization will be presented. The software provides a very general framework for the optimization of a wide variety of parameter sets. The software is especially powerful when applied to the difficult task of molecular model parameter optimization. Three applications of …

Age, Growth, And Simulation Modeling To Characterize Fish Populations At Two Reservoirs In South-Central Kansas, Brian Serpan

Master's Theses

Several fish populations in Kansas are heavily exploited. To obtain insight into the response of fish populations to management actions, fisheries biologists must obtain as much information as possible with limited resources. To address these challenges, biologists often use age and growth information to understand the age structure of the populations, estimate recruitment and mortality, and gain insight into environmental and genetic factors influencing growth. In addition, age and growth data are used to generate yield-per-recruit models, which allow biologists to extrapolate population trends and make broad predictions about population responses to different management actions. Cheney and El Dorado reservoirs …

Photonic Crystal-Based Flow Cytometry, Justin William Stewart

USF Tampa Graduate Theses and Dissertations

Photonic crystals serve as powerful building blocks for the development of lab-on-chip devices. Currently they are used for a wide range of miniaturized optical components such as extremely compact waveguides to refractive-index based optical sensors. Here we propose a new technique for analyzing and characterizing cells through the design of a micro-flow cytometer using photonic crystals. While lab scale flow cytometers have been critical to many developments in cellular biology they are not portable, difficult to use and relatively expensive. By making a miniature sensor capable of replicating the same functionality as the large scale units with photonic crystals, we …

Mapping Forest Canopy Structure With On-Demand Fusion Of Remotely Sensed Data, Gordon M. Green

Dissertations, Theses, and Capstone Projects

Current methods of mapping forest canopy structure often result in data products that are limited in resolution, coverage, or ease of access. On-demand processing introduces several new ways in which existing data products can be combined and re-purposed, mitigating some of these limitations. In this research, we investigate several methods of extending the spatial and temporal resolution, coverage, and accessibility of existing forest canopy datasets by processing them on demand. These methods include downscaling coarse-resolution canopy height data dynamically to estimate height at 30 m and 1 m resolution for any location within the contiguous United States. A related method …

Gpgpu-Enabled Physics Based Deformed Model Simulation, Alejandro Enedino Hernandez Samaniego

Electrical and Computer Engineering ETDs

Computer simulation techniques are widely adopted nowadays in many areas like manufacturing, engineering, graphics, animation, virtual reality and so on. However, the standard finite element based simulation is notorious for its expensive computation. To address this challenge, I present a GPU-based parallel implementation for simulating large elastic deformation. Classic modal analysis provides a set of orthonormal bases vectors, which span a spectral space encoding the dynamics of the elastic body. As each basis vector is orthogonal to each other, the computation is completely decoupled and can be well-fit into the modern GPGPU platform. We further explore the latest feature of …

Simulation Of Social Networks To Maximize The Prevention And Treatment Of Alcohol Use Disorders, Kevin Hallgren

Psychology ETDs

Introduction: Previous studies have found associations between alcohol use and having heavy-drinking social networks. This association is thought to be caused by (1) social influence, where ones social network influences his or her drinking, and (2) social selection, where an individual forms relationships with individuals who drink at similar levels. These processes are reciprocal and, when acting simultaneously, create a feedback loop with non-linear dynamics. Computer simulations have allowed complex systems to be modeled in many scientific fields; however, this method has not yet been used to study the dynamic associations between social networks and alcohol use. Method: The present …

Optimal Sizing And Power Management Strategies Of Islanded Microgrids For Remote Electrification Systems, Faruk A. Bhuiyan

Electronic Thesis and Dissertation Repository

Over the past few years, electrification of remote communities with an efficient utilization of on-site energy resources has entered a new phase of evolution. However, the planning tools and studies for the remote microgrids are considered inadequate. Moreover, the existing techniques have not taken into account the impact of reactive power on component sizes. Thus, this thesis concentrates on optimal sizing design of an islanded microgrid (IMG), which is composed of renewable energy resources (RERs), battery energy storage system (BESS), and diesel generation system (DGS), for the purpose of electrifying off-grid communities. Owing to the utilization of both BESS and …

Turbulent Transition In Electromagnetically Levitated Liquid Metal Droplets, Jie Zhao

Masters Theses

The condition of fluid flow has been proven to have a significant influence on a wide variety of material processes. In electromagnetic levitation (EML) experiments, the internal flow is driven primarily by electromagnetic forces. In 1-g, the positioning forces are very strong and the internal flows are turbulent. To reduce the flows driven by the levitation field, experiments may be performed in reduced gravity and parabolic flights experiments have been adopted as the support in advance. Tracer particles on the surface of levitated droplets in EML experiment performed by SUPOS have been used to investigate the transition from laminar to …

Parallel Multi-Core Verilog Hdl Simulation, Tariq B. Ahmad

Doctoral Dissertations

In the era of multi-core computing, the push for creating true parallel applications that can run on individual CPUs is on the rise. Application of parallel discrete event simulation (PDES) to hardware design verification looks promising, given the complexity of today’s hardware designs. Unfortunately, the challenges imposed by lack of inherent parallelism, suboptimal design partitioning, synchronization and communication overhead, and load balancing, render this approach largely ineffective. This thesis presents three techniques for accelerating simulation at three levels of abstraction namely, RTL, functional gate-level (zero-delay) and gate-level timing. We review contemporary solutions and then propose new ways of speeding up …

Greening Greenpoint: Investigating Technology And Environment-Based Design, Adam Castelli

Masters Theses

This thesis investigates architectural design with a focus on technology and parametric, or computational, design strategies in relation to environmental simulation and sustainability. While numerous studies of new digital and parametric design technologies have been undertaken, few discuss their potential application or synergy with sustainable or environmentally focused design. However, there is increasing interest in bridging the perceived gap between these areas of focus in architectural design, as will be discussed in a section on recent symposia related to performance and design technologies. The research project seeks to apply insight gained from these studies to a design project to be …

Evaluating The Similarity In Postures Between Forklift Operators In Virtual Reality And The Workplace, Youngmin Jun

Electronic Thesis and Dissertation Repository

Forklift operators must adopt awkward postures in order to gain appropriate lines of sight; these postures are associated with musculoskeletal injuries and disorders such as low back pain and neck pain. The purpose of this thesis was to evaluate the similarity in postures between forklift operators in virtual reality simulation of forklift loading and unloading operations and a corresponding real world workplace. This evaluation will help determine whether the virtual reality system is a useful tool for performing controlled laboratory-based investigations of ergonomics issues in heavy mobile machinery. One certified forklift operator and one uncertified individual performed two cycles of …

Catalytic Conversion Of Model Biomass-Derived Syngas To Hydrocarbons Via Fischer-Tropsch Synthesis, Jin Hu

Theses and Dissertations

Biomass to Liquids via Fischer-Tropsch synthesis (BTL-FT) is regarded as one of the most promising routes for providing alternative solution to growing demand for energy and environmental protection. In Chapter I, the development and key issues of BTL-FT process (especially Fischer-Tropsch synthesis) were reviewed and identified. In Chapter II, Mo/HZSM-5 catalyst was synthesized using Incipient Wetness Impregnation method and tested in nitrogen rich model bio-syngas. Different operation parameters (temperature, pressure, and GHSV) were tested to investigate their influence on the catalytic performance. Those parameters were found to affect the performance significantly. Liquid samples from conversion were mainly composed of C8 …

Best Practices In High Fidelity Patient Simulation To Enhance Higher Order Thinking Skills, Kathryn S. Mock

Theses and Dissertations

Undergraduate nursing education has begun to use very expensive and time intensive high fidelity simulation activities without making full use of the ability to build higher order thinking skills in students. Current research in high fidelity patient simulation has tended to be subjective and focus on critical thinking. However, reflective thinking habits of mind must be in place before full use can be made of critical thinking skills. A comprehensive search of all reflective thinking literature used in conjunction with simulated patient experiences by healthcare students was undertaken. A guideline

was created for nurse faculty to use that outlined current …

Thermal And Structural Modeling Of Electrochromics On Glass, Mahesh B. Manandhar

Electronic Theses and Dissertations

Advanced glazing is a type of window glazing that interacts with the surrounding environment to change its thermal and optical properties to create a more comfortable and energy efficient indoor environment. Electrochromics are one type of such advanced glazing materials that change their properties in response to an externally applied voltage controllable by the user or by automation.

The effectiveness of electrochromics depends upon how well it can keep off extreme temperature conditions from outdoors all year round as well as how structurally stable it can remain at such conditions. This research investigates the use of COMSOL, a finite element …

An Evidence-Based Educational Intervention For Staff Nurses And The Rapid Response Team, Grace Katherine Gembrowski

Doctoral Dissertations

Rapid response systems (RRSs) have been proven to decease mortality, cardiac arrests, and ICU admissions. The three major health care system issues lead to failure to rescue: failure to communicate, failure to plan, and failure to recognize deteriorating conditions. It is crucial in a hospital setting that nurses have a basic knowledge base of why, when, and how the RRS should be activated as they are the first line of defense to recognizing signs of deterioration in patients. Previous research has shown that, although signs of patient deterioration are seen by staff, they are not always acted upon (Pusateri et …

Gate Monte Carlo Simulations In A Cloud Computing Environment, Blake Austin Rowedder

UNLV Theses, Dissertations, Professional Papers, and Capstones

The GEANT4-based GATE is a unique and powerful Monte Carlo (MC) platform, which provides a single code library allowing the simulation of specific medical physics applications, e.g. PET, SPECT, CT, radiotherapy, and hadron therapy. However, this rigorous yet flexible platform is used only sparingly in the clinic due to its lengthy calculation time. By accessing the powerful computational resources of a cloud computing environment, GATE's runtime can be significantly reduced to clinically feasible levels without the sizable investment of a local high performance cluster. This study investigated a reliable and efficient execution of GATE MC simulations using a commercial cloud …

Process Cooperativity As A Feedback Metric In Concurrent Message-Passing Languages, Alexander Dean

Theses

Runtime systems for concurrent languages have begun to utilize feedback mechanisms to influence their scheduling behavior as the application proceeds. These feedback mechanisms rely on metrics by which to grade any alterations made to the schedule of the multi-threaded application. As the application's phase shifts, the feedback mechanism is tasked with modifying the scheduler to reduce its overhead and increase the application's efficiency.

Cooperativity is a novel possible metric by which to grade a system. In biochemistry the term cooperativity is defined as the increase or decrease in the rate of interaction between a reactant and a protein as the …

Extending The Novel A-Fem To Model Arbitrary Cracking In Thermo-Elastic Solids, Bao-Chan Do

Open Access Dissertations

A novel finite element capable of arbitrary cracking in solids under coupled thermo-mechanical loading has been formulated and implemented into the commercial software package ABAQUS as a user-defined element. The thermal-mechanical augmented finite element method (TM-AFEM) is an extension of the Augmented Finite Element Method (A-FEM) which includes temperature degrees of freedom (DoFs) so steady-state or transient temperature evolution and their direct effects on fracture processes in solids can be explicitly considered. The formulation incorporates a thermo-mechanical cohesive zone model (TM-CZM) to account for load and heat transfer across the intra-element weak and strong discontinuities (i.e. material interfaces and cracks). …

Ignoring Individual Differences In Times Of Assessment In Growth Curve Modeling, Patrick Coulombe

Psychology ETDs

Researchers often collect longitudinal data so as to model change over time in a phenomenon and for a population of interest. Inevitably, there will be some variation across individuals in specific time intervals between assessments. By necessity or by choice, a researcher can decide to ignore these individual differences in times of assessments. In this simulation study of growth curve modeling, I investigate how ignoring individual differences in time points when modeling change over time relates to convergence and admissibility of solutions, bias in estimates of parameters, power to detect change over time, and, when there is no change over …

Verifying Molecular Dynamics Using Dielectric Spectroscopy, Joshua Dee Smith

Theses and Dissertations

The electrical properties of proteins in solution are important for their structure and function. Computational biophysics studies of proteins need accurate parameters to ensure that numerical simulations match physical reality. Past work in this eld has compared the electrical properties of proteins obtained from dielectric spectroscopy to numerical simulations of proteins in water with adjustment of pKa values to try to capture the inevitable changes in electrical conformation that will occur in a complex structure such as a folded protein. However, fundamental veri cation of the charge parameters of the amino acid building blocks in common molecular dynamics software packages …

Monte Carlo Simulation: When Should A Contestant Stop Spinning?, Gregory Horn

All Student Theses

Every episode of the popular game show The Price Is Right contains two rounds called The Showcase Showdown or The Big Wheel. During these rounds, three contestants spin a large wheel that consists of monetary values from five cents through one dollar in 5 cent increments. The object of this game is to get closest to one dollar without going over in one or a combination of two spins. The two winners of these rounds get to compete for the most valuable prizes at the end of each show. Monte Carlo simulation will be used to find the range of …

Design Of Cpu Simulation Software For Armv7 Instruction Set Architecture, Dillon Tellier

Computer Engineering

Simulations have long been a part of the engineering process in both the professional and academic domain. From a pedagogic standpoint, simulations allow students to explore the dynamics of engineering scenarios by controlling variables, taking measurements, and observing behavior which would be difficult or impossible without simulation. One such tool is a CPU simulator used in Cal Poly’s Computer Architecture classes; this software simulates an instruction accurate operation of a computer processor and reports statistics regarding the execution of the supplied compiled machine code. For the last several years Cal Poly’s computer architecture classes have used a previous version of …

Simulating Influenza Transmission With Network Data, Henry V. Bongiovi

Statistics

Simulating Influenza Transmission with Real Network Data

Henry Bongiovi BS Statistics, California Polytechnic State University, San Luis Obispo

bongiovihenry@gmail.com

Keywords: Network Data, Simulation, Education, Influenza, Epidemic

Disease has been humanities arch rival since the dawn of our existence. As such, we have been trying our best to understand its spread and proliferation. One of the most common diseases, Influenza, is also one of the most complex. To understand the complexities of its spread would greatly improve our ability to combat it and other diseases like it. Using R in conjunction with the package statnet, I have created a simulation of …

Smarticles: A Method For Identifying And Correcting Instability And Error Caused By Explicit Integration Techniques In Physically Based Simulations, Susan Aileen Marano

Master's Theses

Using an explicit integration method in physically based animations has many advantages including conceptual and computational simplicity, however, it re- quires small time steps to ensure low numerical instability. Simulations with large numbers of individually interacting components such as cloth, hair, and fluid models, are limited by the sections of particles most susceptible to error. This results in the need for smaller time steps than required for the majority of the system. These sections can be diverse and dynamic, quickly changing in size and location based on forces in the system. Identifying and handling these trou- blesome sections could allow …