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Title: NOISE PREDICTION METHODS.
Creator: Perry, Nicole Kent, Glegg, Stewart, Florida Atlantic University, Department of Ocean and Mechanical Engineering, College of Engineering and Computer Science
Abstract/Description: Noise prediction methods are necessary in aspects of aerodynamic and hydrodynamic engineering. Predictive models of noise from rotating machinery ingesting turbulence is of much interest and relatively recently studied. This thesis presents a numerical method processed in a series of three codes that was written and edited to receive input for geometrical features of rotating machinery, as well as, adjustments to turbulent operating conditions. One objective of this thesis was to create a...
Show moreNoise prediction methods are necessary in aspects of aerodynamic and hydrodynamic engineering. Predictive models of noise from rotating machinery ingesting turbulence is of much interest and relatively recently studied. This thesis presents a numerical method processed in a series of three codes that was written and edited to receive input for geometrical features of rotating machinery, as well as, adjustments to turbulent operating conditions. One objective of this thesis was to create a platform of analysis for any rotor design to obtain five parameters necessary for noise prediction; 1) the hydrodynamic inflow angle to each blade section, 2) chord length as a function of radius, 3) the cylindrical radius of each blade section, 4) & 5) the leading edge as a function of span in both the rotor-plane and as a function of axial distance downstream. Another objective of this thesis was to use computational fluid dynamics (CFD), specifically by using a Reynold’s-Averaged Navier-Stokes (RANS) Shear Stress Transport (SST) 𝑘 − 𝜔 model simulation in ANSYS Fluent, to obtain the turbulent kinetic energy distribution, also necessary in the noise prediction method presented. The purpose of collecting the rotor geometry data and turbulent kinetic energy data was to input the values into the first of the series of codes and run the calculation so that the output spectra could be compared to experimental noise measurements conducted at the Stability Wind Tunnel at Virginia Tech. The comparison shows that the prediction method results in data that can be reliable if careful attention is payed to the input parameters and the length scale used for analysis. The significance of this research is the noise prediction method presented and used simplifies the model of turbulence by using a correlation function that can be determined by a one-dimensional function while also simplifying the iterations completed on rotor blade to calculate the unsteady forces.
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Date Issued: 2020
PURL: http://purl.flvc.org/fau/fd/FA00013487
Subject Headings: Noise, Aerodynamic noise, Hydrodynamics, Noise control--Mathematical models
Format: Document (PDF)

$The topology of archaeological site distributions: the lacunarity and fractality of prehistoric oaxacan settlements$

Title: The topology of archaeological site distributions: the lacunarity and fractality of prehistoric oaxacan settlements.
Creator: Flanagan, Kelin, Brown, Clifford T., Florida Atlantic University, Dorothy F. Schmidt College of Arts and Letters, Department of Anthropology
Abstract/Description: Survey is time-consuming and expensive. Therefore, it needs to be both effective and efficient. Some archaeologists have argued that current survey techniques are not effective (Shott 1985, 1989), but most archaeologists continue to employ these methods and therefore must believe they are effective. If our survey techniques are effective, why do simulations suggest otherwise? If they are ineffective, can we improve them? The answers to these practical questions depend on the topological...
Show moreSurvey is time-consuming and expensive. Therefore, it needs to be both effective and efficient. Some archaeologists have argued that current survey techniques are not effective (Shott 1985, 1989), but most archaeologists continue to employ these methods and therefore must believe they are effective. If our survey techniques are effective, why do simulations suggest otherwise? If they are ineffective, can we improve them? The answers to these practical questions depend on the topological characteristics of archaeological site distributions. In this study I analyze archaeological site distributions in the Valley of Oaxaca, Mexico, using lacunarity and fractal dimension. Fractal dimension is a parameter of fractal patterns, which are complex, space-filling designs exhibiting self-similarity and power-law scaling. Lacunarity is a statistical measure that describes the texture of a spatial dispersion. It is useful in understanding how archaeological tests should be spaced during surveys. Between these two measures, I accurately describe the regional topology and suggest new considerations for archaeological survey design.
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Date Issued: 2014
PURL: http://purl.flvc.org/fau/fd/FA00004109, http://purl.flvc.org/fau/fd/FA00004109
Subject Headings: Excavations (Archaeology) -- Methodology, Fractals, Social sciences -- Mathematical models, Stochastic processes
Format: Document (PDF)

Title: Investigation of the impact of junctions on the frequency of road crashes in urban areas.
Creator: Kapetanakis, Konstantinos, Kaisar, Evangelos I., Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: The huge financial and societal cost associated with traffic crashes and the fact that more than half of them occur at junctions, revealed the need for further research in the field of junction safety. This research aims to investigate the quantitative impact of junctions in relation to other selected parameters, on the frequency of road crashes in urban areas in the State of Florida. Mathematical models were developed with the use of loglinear analysis method for different traffic volumes in...
Show moreThe huge financial and societal cost associated with traffic crashes and the fact that more than half of them occur at junctions, revealed the need for further research in the field of junction safety. This research aims to investigate the quantitative impact of junctions in relation to other selected parameters, on the frequency of road crashes in urban areas in the State of Florida. Mathematical models were developed with the use of loglinear analysis method for different traffic volumes in and out of junction. In addition, sensitivity analysis was performed in order to better understand the impact of selected parameters to the total number of crashes. The analysis has led to several conclusions such as that angle and left turn collisions have much higher probability of occurrence at junctions and that crashes which occur at junctions are much more probable for low and medium volumes compared to no-junctions.
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Date Issued: 2014
PURL: http://purl.flvc.org/fau/fd/FA00004128, http://purl.flvc.org/fau/fd/FA00004128
Subject Headings: Roads -- Intersections and interchanges -- Safety measures, Traffic safety -- Mathematical models
Format: Document (PDF)

Title: Synchronization of coupled semiconductor lasers.
Creator: London, Michael S., Charles E. Schmidt College of Science, Department of Physics
Abstract/Description: The synchronization of coupled semiconductor lasers with delay is investigated by numerical simulations of the nonlinear dynamic models complemented by a stability analysis of the linearized system. The equations used in the dissertation are based on the well known "Lang-Kobayashi" model modified to include unidirectional and bidirectional coupling. Stability diagrams are calculated and supplemented by numerically integrated time series. Synchronization is determined and quantified by...
Show moreThe synchronization of coupled semiconductor lasers with delay is investigated by numerical simulations of the nonlinear dynamic models complemented by a stability analysis of the linearized system. The equations used in the dissertation are based on the well known "Lang-Kobayashi" model modified to include unidirectional and bidirectional coupling. Stability diagrams are calculated and supplemented by numerically integrated time series. Synchronization is determined and quantified by computing the cross-correlation function. It is found that synchronized states are achievable for a wide range of coupling constants and delay times. These findings have implications for experiment and technological applications, notably in cryptography.
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Date Issued: 2011
PURL: http://purl.flvc.org/FAU/3318673
Subject Headings: Semiconductor lasers, Optical bistability, Nonlinear theories, Diodes, Semiconductor, Mathematical models
Format: Document (PDF)

Title: Optimization and inductive models for continuous estimation of hydrologic variables.
Creator: Brown, Ricardo Eric., College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description: This thesis develops methodologies for continuous estimation of hydrological variables which infill missing daily rainfall data and the forecast of weekly streamflows from a watershed. Several mathematical programming formulations were developed and used to estimate missing historical rainfall data. Functional relationships were created between radar precipitation and known rain gauge data then are used to estimate the missing data. Streamflow predictions models require highly non-linear...
Show moreThis thesis develops methodologies for continuous estimation of hydrological variables which infill missing daily rainfall data and the forecast of weekly streamflows from a watershed. Several mathematical programming formulations were developed and used to estimate missing historical rainfall data. Functional relationships were created between radar precipitation and known rain gauge data then are used to estimate the missing data. Streamflow predictions models require highly non-linear mathematical models to capture the complex physical characteristics of a watershed. An artificial neural network model was developed for streamflow prediction. There are no set methods of creating a neural network and the selection of architecture and inputs to a neural network affects the performance. This thesis addresses this issue with automated input and network architecture selection through optimization. MATLABª scripts are developed and used to test many combinations and select a model through optimization.
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Date Issued: 2012
PURL: http://purl.flvc.org/FAU/3342036
Subject Headings: Hydorlogic models, Mathematics, Fuzzy logic, Spatial analysis (Statistics), Stream measurements
Format: Document (PDF)

Title: Software framework for prognostic health monitoring of ocean-based power generation.
Creator: Bowren, Mark., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description: On August 5, 2010 the U.S. Department of Energy (DOE) has designated the Center for Ocean Energy Technology (COET) at Florida Atlantic University (FAU) as a national center for ocean energy research and development of prototypes for open-ocean power generation. Maintenance on ocean-based machinery can be very costly. To avoid unnecessary maintenance it is necessary to monitor the condition of each machine in order to predict problems. This kind of prognostic health monitoring (PHM) requires a...
Show moreOn August 5, 2010 the U.S. Department of Energy (DOE) has designated the Center for Ocean Energy Technology (COET) at Florida Atlantic University (FAU) as a national center for ocean energy research and development of prototypes for open-ocean power generation. Maintenance on ocean-based machinery can be very costly. To avoid unnecessary maintenance it is necessary to monitor the condition of each machine in order to predict problems. This kind of prognostic health monitoring (PHM) requires a condition-based maintenance (CBM) system that supports diagnostic and prognostic analysis of large amounts of data. Research in this field led to the creation of ISO13374 and the development of a standard open-architecture for machine condition monitoring. This thesis explores an implementation of such a system for ocean-based machinery using this framework and current open-standard technologies.
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Date Issued: 2012
PURL: http://purl.flvc.org/FAU/3342035
Subject Headings: Machinery, Monitoring, Marine turbines, Mathematical models, Fluid dynamics, Structural dynamics
Format: Document (PDF)

Title: AN ECONOMETRIC MODEL OF MARTIN COUNTY, 1959-1970.
Creator: JOCHEM, DAGNEY SERVIN., Florida Atlantic University, Stronge, William B., College of Business, Department of Economics
Abstract/Description: This Thesis examines the components of the economic base of Martin County. A model is then constructed to reflect the nature of the county's economic base. Stability and multiplier analysis are applied to the model, followed by short run forecasts under various assumptions.
Date Issued: 1973
PURL: http://purl.flvc.org/fcla/dt/13563
Subject Headings: Martin County (Fla)--Economic conditions--Mathematical models
Format: Document (PDF)

Title: AN ECONOMETRIC MODEL OF PALM BEACH COUNTY, FLORIDA.
Creator: HILTON, JOHN DAVID., Florida Atlantic University, Stronge, William B., College of Business, Department of Economics
Abstract/Description: The purpose of this thesis is to estimate an econometric model of Palm Beach County, Florida. An econometric model was chosen as the appropriate method for study as the said county is characteristic of a service based final demand economy. An underlying objective was to utilize data on income and employment variables available on a consistent bases from a Regional Economic Information System Data computer tape provided by the u.s. Department of Commerce 1983. These data distinguished among 11...
Show moreThe purpose of this thesis is to estimate an econometric model of Palm Beach County, Florida. An econometric model was chosen as the appropriate method for study as the said county is characteristic of a service based final demand economy. An underlying objective was to utilize data on income and employment variables available on a consistent bases from a Regional Economic Information System Data computer tape provided by the u.s. Department of Commerce 1983. These data distinguished among 11 industries and referred to the years 1967-1983. In conclusion the model shows that ordinary least squares estimation results were generally significant in the signas and goodness of fit. However evidence of positive serial correlation of the disturbances was detected and the results did not change substantially after applying the Cocran-Orcutt procedure.
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Date Issued: 1984
PURL: http://purl.flvc.org/fcla/dt/14197
Subject Headings: Palm Beach County (Fla)--Economic conditions--Mathematical models
Format: Document (PDF)

Title: Development of a variable-length underwater cable model.
Creator: Curic, Dusan., Florida Atlantic University, Driscoll, Frederick R.
Abstract/Description: This thesis develops a novel variable length cable model to simulate the behavior of submerged cables with variable unstretched length and a PC based simulation that integrates the governing cable equations. The general model is developed from continuous cable equations that are discretized using a finite element method with linear elements. Two systems of equations were developed, one for a variable length elastic element and the other for a constant length elastic element. A cable...
Show moreThis thesis develops a novel variable length cable model to simulate the behavior of submerged cables with variable unstretched length and a PC based simulation that integrates the governing cable equations. The general model is developed from continuous cable equations that are discretized using a finite element method with linear elements. Two systems of equations were developed, one for a variable length elastic element and the other for a constant length elastic element. A cable transition model is developed to ensure dynamic compatibility when a variable length element is divided or combined. The model proved to be an efficient and reliable tool to predict the behavior of underwater cables with variable length.
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Date Issued: 2003
PURL: http://purl.flvc.org/fcla/dt/12976
Subject Headings: Cables, Submarine--Mathematical models, Finite element method
Format: Document (PDF)

Title: Development of a discrete time multivariable system identification technique.
Creator: Saravanan, Natarajan, Florida Atlantic University, Duyar, Ahmet, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: An identification scheme which can be used for discrete time multi-input multi-output time invariant systems is presented. The identification scheme involves two steps; (1) The identification of a set of invariant indices (Structure identification) and (2) The estimation of the parameters of the system (Parametric identification). The technique utilizes a canonical representation of a system which is based on the notion of output injection. This canonical form is dependent on a chosen real...
Show moreAn identification scheme which can be used for discrete time multi-input multi-output time invariant systems is presented. The identification scheme involves two steps; (1) The identification of a set of invariant indices (Structure identification) and (2) The estimation of the parameters of the system (Parametric identification). The technique utilizes a canonical representation of a system which is based on the notion of output injection. This canonical form is dependent on a chosen real number alpha and is therefore called the alpha-canonical form. Least square estimation technique is used for parameter estimation. The off-line version of this identification scheme is presented here. This scheme is then used to generate a linear model of the Space Shuttle Main Engine at the operating point corresponding to the 100% power level from the nonlinear dynamic engine simulation.
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Date Issued: 1989
PURL: http://purl.flvc.org/fcla/dt/14558
Subject Headings: System identification, Space shuttles--Propulsion systems--Mathematical models
Format: Document (PDF)

Title: Finite element methods for stochastic structures and conditional simulation.
Creator: Ren, Yongjian., Florida Atlantic University, Elishakoff, Isaac, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: This dissertation deals with the non-perturbative finite element methods for stochastic structures and conditional simulation techniques for random fields. Three different non-perturbative finite element schemes have been proposed to compute the first and second moments of displacement responses of stochastic structures. These three methods are based, respectively, on (i) the exact inverse of the global stiffness matrix for simple stochastic structures; (ii) the variational principles for...
Show moreThis dissertation deals with the non-perturbative finite element methods for stochastic structures and conditional simulation techniques for random fields. Three different non-perturbative finite element schemes have been proposed to compute the first and second moments of displacement responses of stochastic structures. These three methods are based, respectively, on (i) the exact inverse of the global stiffness matrix for simple stochastic structures; (ii) the variational principles for statically-determinate beams; and (iii)Â the element-level flexibility for general stochastic statically indeterminate structures. The non-perturbative finite element method for stochastic structures possesses several advantages over the conventional perturbation-based finite element method for stochastic structures, including (i) applicability to large values of the coefficient of variation of random parameters; (ii) convergence to exact solutions when the finite element mesh is refined; (iii) requirement of less statistical information than that demanded by the high-order perturbation methods. Conditional simulation of random fields has been an extremely important research field in most recent years due to its application in urban earthquake monitoring systems. This study generalizes the available simulation technique for one-variate Gaussian random fields, conditioned by realizations of the fields, to multi-variate vector random field, conditioned by the realizations of the fields themselves as well as the realizations of the fields derivatives. Furthermore, a conditional simulation for non-Gaussian random fields is also proposed in this study by combining the unconditional simulation technique of non-Gaussian fields and the conditional simulation technique of Gaussian fields. Finally, the dissertation incorporates the simulation technique of random field into the non-perturbation finite element method for stochastic structures, to handle the cases where only one-dimensional probability density function and the correlation function of the random parameters are available, the demanded two-dimensional probability density function is unavailable. Simulation technique is applied to generate the samples of random fields which are used to estimate the correlation between flexibilities over elements. The estimated correlation of flexibility is then used in finite element analysis for stochastic structures. For each proposed approach, numerous examples and numerical results have been implemented.
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Date Issued: 1998
PURL: http://purl.flvc.org/fcla/dt/12580
Subject Headings: Finite element method, Stochastic processes, Random fields--Mathematical models
Format: Document (PDF)

Title: Hydrodynamics and control of an autonomous underwater vehicle equipped with a vectored thruster.
Creator: Le Page, Yann Georges., Florida Atlantic University, Holappa, Kenneth W., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: In this study, a laminar flow hull shape is implemented on an Autonomous Underwater Vehicle (AUV), with boundary layer suction at the aft end of the hull to prevent separation. The hull shape has the largest diameter of the vehicle near the aft end of the hull resulting in an accelerating flow over the majority of the hull's surface. The problem of axially symmetrical flow around the AUV is solved using a potential flow analysis. A finite difference algorithm evaluates the stream function,...
Show moreIn this study, a laminar flow hull shape is implemented on an Autonomous Underwater Vehicle (AUV), with boundary layer suction at the aft end of the hull to prevent separation. The hull shape has the largest diameter of the vehicle near the aft end of the hull resulting in an accelerating flow over the majority of the hull's surface. The problem of axially symmetrical flow around the AUV is solved using a potential flow analysis. A finite difference algorithm evaluates the stream function, leading to the computation of fluid velocity and pressure fields. The boundary layer characteristics are analyzed to predict the risk of separation. The numerical results are compared with laboratory measurements of the flow using a Particle Image Velocimetry system. Fuzzy Logic Sliding Mode Controllers are implemented to control the vectored thruster vehicle, and are simulated using a six-degree of freedom dynamic model of the vehicle.
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Date Issued: 2000
PURL: http://purl.flvc.org/fcla/dt/15766
Subject Headings: Boundary layer, Laminar flow, Hydrodynamics, Oceanographic submersibles--Mathematical models
Format: Document (PDF)

Title: Testing an integrated model of crime: Traditional and general strain, differential association, and control theories.
Creator: Ostrowsky, Michael K., Florida Atlantic University, Wilson, Thomas
Abstract/Description: Theories of criminal behavior have been tested individually and in integrated models incorporating multiple theories. Using data from the National Youth Survey Wave VII (1987), an integrated model incorporating traditional strain, differential association, and control theories is tested. Results show that each theory alone is a significant predictor of criminal behavior. Also, the integrated model enhances explanatory power of criminal behavior, over that of each individual theory. General...
Show moreTheories of criminal behavior have been tested individually and in integrated models incorporating multiple theories. Using data from the National Youth Survey Wave VII (1987), an integrated model incorporating traditional strain, differential association, and control theories is tested. Results show that each theory alone is a significant predictor of criminal behavior. Also, the integrated model enhances explanatory power of criminal behavior, over that of each individual theory. General strain theory (GST) variables are then added into the integrated model. In fact, this thesis is the first study, using young adults, that tests for the effects of multiple GST variables on actual property and violent crime commission, while controlling for differential association, social control, and traditional strain. Results show that inclusion of GST not only increases the model's predictive utility for understanding criminal behavior, but also that GST is the best predictor of violent crime among the several theories considered.
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Date Issued: 2001
PURL: http://purl.flvc.org/fcla/dt/12833
Subject Headings: Criminal behavior, Prediction of, Crime--Mathematical models, Criminology
Format: Document (PDF)

Title: Variations in model discretization methodology and its effects upon groundwater modeling.
Creator: Whitman, Jason L., Florida Atlantic University, Restrepo, Jorge I.
Abstract/Description: It is a fundamental supposition in groundwater modeling that as the discretization of a model domain is increased, the model's precision increases accordingly (Anderson and Woessner, 1992). However, the quantifiable amount and specific circumstances of that benefit remain unclear. The purpose of this research is to examine the output variations discerned as a result of applying successively coarsened discretization scenarios to a groundwater model test case. The test models, comprised of both...
Show moreIt is a fundamental supposition in groundwater modeling that as the discretization of a model domain is increased, the model's precision increases accordingly (Anderson and Woessner, 1992). However, the quantifiable amount and specific circumstances of that benefit remain unclear. The purpose of this research is to examine the output variations discerned as a result of applying successively coarsened discretization scenarios to a groundwater model test case. The test models, comprised of both regular (square) and irregular forty-four individual model output solutions. Detailed analysis of the piezometric head values, mass balance flow terms, and solution convergence times for each model run provides valuable insight into the complex relationship existing between spatial discretization and its effect upon model output values. Consequently, the aforementioned relationship proves to be highly complex, often affecting multiple model parameters in dissimilar manners while maintaining consistency in others.
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Date Issued: 1999
PURL: http://purl.flvc.org/fcla/dt/15750
Subject Headings: Groundwater flow--Computer simulation, Groundwater flow--Mathematical models
Format: Document (PDF)

Title: GALLOPING OF AN ELASTICALLY SUPPORTED BLUFF BODY IN TURBULENT FLOW.
Creator: Li, Qiang, Florida Atlantic University, Lin, Y. K., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description: The phenomenon of flow-induced vibration is found in many engineering systems. The fluid flow generates forces on the structure that cause motion of the structure. In turn, the structural motion changes the angle of attack between the flow and the structure, hence the forces on the structure. Furthermore, turbulence generally exists in a natural fluid flow; namely, the fluid velocity contains a random part. Thus, the problem is formulated as a nonlinear system under random excitations. This...
Show moreThe phenomenon of flow-induced vibration is found in many engineering systems. The fluid flow generates forces on the structure that cause motion of the structure. In turn, the structural motion changes the angle of attack between the flow and the structure, hence the forces on the structure. Furthermore, turbulence generally exists in a natural fluid flow; namely, the fluid velocity contains a random part. Thus, the problem is formulated as a nonlinear system under random excitations. This thesis is focused on one type of motion known as galloping. A mathematical model for the motion of an elastically supported square cylinder in turbulent flow is developed. The physical nonlinear equation is converted to ideal stochastic differential equations of the Ito type using the stochastic averaging method. The probability density for the motion amplitude and the values for the most probable amplitudes are obtained for various mean flow velocities and turbulence levels.
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Date Issued: 1987
PURL: http://purl.flvc.org/fcla/dt/14361
Subject Headings: Random vibration--Mathematical models, Turbulence, Fluid dynamics
Format: Document (PDF)

Title: Fractal dimensions of Florida wetlands.
Creator: King, Stephen James., Florida Atlantic University, Shaw, Shih-Lung, Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description: Application of fractal concepts to geographic problems is reviewed. The basics of fractals are presented. Scale, self-similarity and their effects on natural phenomena are discussed. Eight sites (six wetland and two non-wetland) are studied. Using Landsat Multi-Spectral Scanner data, the fractal dimensions of the surface reflectance of the sites are calculated by the contour method. Values obtained are related to the type of wetland and the structure and processes that characterize that type...
Show moreApplication of fractal concepts to geographic problems is reviewed. The basics of fractals are presented. Scale, self-similarity and their effects on natural phenomena are discussed. Eight sites (six wetland and two non-wetland) are studied. Using Landsat Multi-Spectral Scanner data, the fractal dimensions of the surface reflectance of the sites are calculated by the contour method. Values obtained are related to the type of wetland and the structure and processes that characterize that type of wetland. Forested wetlands were found to have the lowest fractal dimension. Mixed forested and non-forested had the highest. Marshy non-forested sites were higher than expected. Conclusions drawn are that physical characteristics of different wetlands result in measurable differences in fractal dimension. Fractals will be valuable in computer aided wetland identification in the future.
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Date Issued: 1993
PURL: http://purl.flvc.org/fcla/dt/14892
Subject Headings: Wetlands--Florida, Fractals, Geography--Mathematical models
Format: Document (PDF)

Title: LOCATION ANALYSIS AND ITS APPLICATION.
Creator: CAGATAY, TANER., Florida Atlantic University, Hung, Chao-shun, College of Business, Department of Economics
Abstract/Description: This thesis discusses the locational theories and their implications and applications on the Turkish Consulate. Chapters I and II analyzes the theories of Von Thunen, Jsard, and Hoover. Chapter III discuses Weber's theories and an application on the Turkish Consulate. Chapter IV summarizes the conclusions.
Date Issued: 1985
PURL: http://purl.flvc.org/fcla/dt/14261
Subject Headings: Economics--Mathematical models, Turkey--Economic conditions
Format: Document (PDF)

Title: Modeling and estimation for the Morpheus AUV dynamics.
Creator: Binois, Nicolas., Florida Atlantic University, An, Edgar
Abstract/Description: This thesis describes the determination of linear and nonlinear coefficients for the Morpheus vehicle. Added mass and nonlinear damping terms were obtained by strip-theory. These added mass coefficients were compared to the ones previously computed by boundary-integral method. Open-loop simulations were conducted using both sets of added-mass coefficients along with the damping terms, which were adjusted to fit at-sea data. A previously estimation technique for hydrodynamic coefficients has...
Show moreThis thesis describes the determination of linear and nonlinear coefficients for the Morpheus vehicle. Added mass and nonlinear damping terms were obtained by strip-theory. These added mass coefficients were compared to the ones previously computed by boundary-integral method. Open-loop simulations were conducted using both sets of added-mass coefficients along with the damping terms, which were adjusted to fit at-sea data. A previously estimation technique for hydrodynamic coefficients has been applied to the Morpheus AUV using a Kalman filter. This technique based on linearized equations of motion was tested with linear and nonlinear data generated by simulation. Steering and diving motions were considered resulting in the estimation of different sets of coefficients. Results showed that the estimated values were able to reproduce accurately the vehicle motion in the linear as well as in the nonlinear case.
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Date Issued: 2003
PURL: http://purl.flvc.org/fcla/dt/12972
Subject Headings: Oceanographic submersibles--Mathematical models, Hydrodynamics, Underwater navigation
Format: Document (PDF)

Title: A Study of the Effects of Unpredictable Delays on Plant Floor Productivity Using the Dynamo Language and Modeling Techniques.
Creator: Dent, Bruce David, Florida Atlantic University, Sanford, Donald G.
Abstract/Description: This thesis uses the Dynamo Language and Modeling Techniques to show the effects of unpredictable delays on manufacturing facilities using a job shop production strategy. These delays affect productivity in that they cause increased work-in-process inventories and underutilized resources. Two models are developed, a macro model treating the plant floor as an entity and a micro model which shows the day-to-day operation of four work centers. The same basic assumptions are made in each model so...
Show moreThis thesis uses the Dynamo Language and Modeling Techniques to show the effects of unpredictable delays on manufacturing facilities using a job shop production strategy. These delays affect productivity in that they cause increased work-in-process inventories and underutilized resources. Two models are developed, a macro model treating the plant floor as an entity and a micro model which shows the day-to-day operation of four work centers. The same basic assumptions are made in each model so the results may be used to complement each other.
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Date Issued: 1977
PURL: http://purl.flvc.org/fcla/dt/13858
Subject Headings: Management--Research, Factory management--Mathematical models
Format: Document (PDF)

Title: Spatio-temporal dynamics in the SEIRS epidemic model.
Creator: Mei, Lei, Florida Atlantic University, Wille, Luc T.
Abstract/Description: The Susceptible-Exposed-Infected-Recovered-Susceptible (SEIRS) spatial epidemic model is governed by non-linear equations with several parameters related to birth and death, contact rate, disease latency, infectious period, and recycle rate. Both continuum results and lattice results show the existing of disease persistence and critical density. The upper limit of birth and death rate is observed, power spectrum with 1/f profile is discussed. Some other models, as limiting cases of the SEIRS...
Show moreThe Susceptible-Exposed-Infected-Recovered-Susceptible (SEIRS) spatial epidemic model is governed by non-linear equations with several parameters related to birth and death, contact rate, disease latency, infectious period, and recycle rate. Both continuum results and lattice results show the existing of disease persistence and critical density. The upper limit of birth and death rate is observed, power spectrum with 1/f profile is discussed. Some other models, as limiting cases of the SEIRS model, are also studied. Lower limit of birth and death rate for the models without recycle rate has also obtained. Finally two general rules governing epidemic models are summarized. Visualization is available on our web site http://www.cse.fau.edu/~lmei/simulation.html
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Date Issued: 1999
PURL: http://purl.flvc.org/fcla/dt/15633
Subject Headings: Epidemiology--Mathematical models, Demography, Epidemics--Computer simulation
Format: Document (PDF)

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