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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 rotorplane 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’sAveraged NavierStokes (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 onedimensional function while also simplifying the iterations completed on rotor blade to calculate the unsteady forces.
Show less  Date Issued
 2020
 PURL
 http://purl.flvc.org/fau/fd/FA00013487
 Subject Headings
 Noise, Aerodynamic noise, Hydrodynamics, Noise controlMathematical models
 Format
 Document (PDF)
 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 timeconsuming 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 timeconsuming 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, spacefilling designs exhibiting selfsimilarity and powerlaw 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.
Show less  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 nojunctions.
Show less  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 "LangKobayashi" 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 "LangKobayashi" 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 crosscorrelation 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.
Show less  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 nonlinear...
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 nonlinear 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.
Show less  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 oceanbased 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 openocean power generation. Maintenance on oceanbased 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 openocean power generation. Maintenance on oceanbased 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 conditionbased 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 openarchitecture for machine condition monitoring. This thesis explores an implementation of such a system for oceanbased machinery using this framework and current openstandard technologies.
Show less  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, 19591970.
 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 conditionsMathematical 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 19671983. 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 CocranOrcutt procedure.
Show less  Date Issued
 1984
 PURL
 http://purl.flvc.org/fcla/dt/14197
 Subject Headings
 Palm Beach County (Fla)Economic conditionsMathematical models
 Format
 Document (PDF)
 Title
 Development of a variablelength 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.
Show less  Date Issued
 2003
 PURL
 http://purl.flvc.org/fcla/dt/12976
 Subject Headings
 Cables, SubmarineMathematical 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 multiinput multioutput 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 multiinput multioutput 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 alphacanonical form. Least square estimation technique is used for parameter estimation. The offline 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.
Show less  Date Issued
 1989
 PURL
 http://purl.flvc.org/fcla/dt/14558
 Subject Headings
 System identification, Space shuttlesPropulsion systemsMathematical 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 nonperturbative finite element methods for stochastic structures and conditional simulation techniques for random fields. Three different nonperturbative 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 nonperturbative finite element methods for stochastic structures and conditional simulation techniques for random fields. Three different nonperturbative 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 staticallydeterminate beams; and (iii)Â the elementlevel flexibility for general stochastic statically indeterminate structures. The nonperturbative finite element method for stochastic structures possesses several advantages over the conventional perturbationbased 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 highorder 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 onevariate Gaussian random fields, conditioned by realizations of the fields, to multivariate 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 nonGaussian random fields is also proposed in this study by combining the unconditional simulation technique of nonGaussian fields and the conditional simulation technique of Gaussian fields. Finally, the dissertation incorporates the simulation technique of random field into the nonperturbation finite element method for stochastic structures, to handle the cases where only onedimensional probability density function and the correlation function of the random parameters are available, the demanded twodimensional 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.
Show less  Date Issued
 1998
 PURL
 http://purl.flvc.org/fcla/dt/12580
 Subject Headings
 Finite element method, Stochastic processes, Random fieldsMathematical 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 sixdegree of freedom dynamic model of the vehicle.
Show less  Date Issued
 2000
 PURL
 http://purl.flvc.org/fcla/dt/15766
 Subject Headings
 Boundary layer, Laminar flow, Hydrodynamics, Oceanographic submersiblesMathematical 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.
Show less  Date Issued
 2001
 PURL
 http://purl.flvc.org/fcla/dt/12833
 Subject Headings
 Criminal behavior, Prediction of, CrimeMathematical 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 fortyfour 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.
Show less  Date Issued
 1999
 PURL
 http://purl.flvc.org/fcla/dt/15750
 Subject Headings
 Groundwater flowComputer simulation, Groundwater flowMathematical 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 flowinduced 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 flowinduced 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.
Show less  Date Issued
 1987
 PURL
 http://purl.flvc.org/fcla/dt/14361
 Subject Headings
 Random vibrationMathematical models, Turbulence, Fluid dynamics
 Format
 Document (PDF)
 Title
 Fractal dimensions of Florida wetlands.
 Creator
 King, Stephen James., Florida Atlantic University, Shaw, ShihLung, 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, selfsimilarity and their effects on natural phenomena are discussed. Eight sites (six wetland and two nonwetland) are studied. Using Landsat MultiSpectral 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, selfsimilarity and their effects on natural phenomena are discussed. Eight sites (six wetland and two nonwetland) are studied. Using Landsat MultiSpectral 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 nonforested had the highest. Marshy nonforested 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.
Show less  Date Issued
 1993
 PURL
 http://purl.flvc.org/fcla/dt/14892
 Subject Headings
 WetlandsFlorida, Fractals, GeographyMathematical models
 Format
 Document (PDF)
 Title
 LOCATION ANALYSIS AND ITS APPLICATION.
 Creator
 CAGATAY, TANER., Florida Atlantic University, Hung, Chaoshun, 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
 EconomicsMathematical models, TurkeyEconomic 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 striptheory. These added mass coefficients were compared to the ones previously computed by boundaryintegral method. Openloop simulations were conducted using both sets of addedmass coefficients along with the damping terms, which were adjusted to fit atsea 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 striptheory. These added mass coefficients were compared to the ones previously computed by boundaryintegral method. Openloop simulations were conducted using both sets of addedmass coefficients along with the damping terms, which were adjusted to fit atsea 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.
Show less  Date Issued
 2003
 PURL
 http://purl.flvc.org/fcla/dt/12972
 Subject Headings
 Oceanographic submersiblesMathematical 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 workinprocess 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 daytoday 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 workinprocess 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 daytoday operation of four work centers. The same basic assumptions are made in each model so the results may be used to complement each other.
Show less  Date Issued
 1977
 PURL
 http://purl.flvc.org/fcla/dt/13858
 Subject Headings
 ManagementResearch, Factory managementMathematical models
 Format
 Document (PDF)
 Title
 Spatiotemporal dynamics in the SEIRS epidemic model.
 Creator
 Mei, Lei, Florida Atlantic University, Wille, Luc T.
 Abstract/Description

The SusceptibleExposedInfectedRecoveredSusceptible (SEIRS) spatial epidemic model is governed by nonlinear 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 SusceptibleExposedInfectedRecoveredSusceptible (SEIRS) spatial epidemic model is governed by nonlinear 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
Show less  Date Issued
 1999
 PURL
 http://purl.flvc.org/fcla/dt/15633
 Subject Headings
 EpidemiologyMathematical models, Demography, EpidemicsComputer simulation
 Format
 Document (PDF)