Engineering Commons^™

Development Of Rear-End Collision Avoidance In Automobiles, Uttamkumar Dravidam

FIU Electronic Theses and Dissertations

The goal of this work is to develop a Rear-End Collision Avoidance System for automobiles. In order to develop the Rear-end Collision Avoidance System, it is stated that the most important difference from the old practice is the fact that new design approach attempts to completely avoid collision instead of minimizing the damage by over-designing cars. Rear-end collisions are the third highest cause of multiple vehicle fatalities in the U.S. Their cause seems to be a result of poor driver awareness and communication. For example, car brake lights illuminate exactly the same whether the car is slowing, stopping or the …

Design And Implementation Of A Web Based Shop Floor Control System To Maintain Schedule Feasibility In A Dynamic Job Shop Environment, Anil Bommakanti

FIU Electronic Theses and Dissertations

The effective control of production activities in dynamic job shop with predetermined resource allocation for all the jobs entering the system is a unique manufacturing environment, which exists in the manufacturing industry. In this thesis a framework for an Internet based real time shop floor control system for such a dynamic job shop environment is introduced. The system aims to maintain the schedule feasibility of all the jobs entering the manufacturing system under any circumstance. The system is capable of deciding how often the manufacturing activities should be monitored to check for control decisions that need to be taken on …

Development Of A Near-Perfect Lens Surface Generation Advisor (Nplsga), Victor De Rossi

FIU Electronic Theses and Dissertations

The Near-Perfect Lens Surface Generation Advisor is a software program designed to optimize manufacturing conditions of acrylic lenses. The program numerically minimizes the total manufacturing cost of machining and hand polishing by choosing the optimal feed rate, tool diameter and step size. Derivations of mathematical equations plus neural networks estimations were used to calculate the total cost as a function of these given variables. Machining time was found from values obtained from feed rate and tool displacement. Polishing time was estimated based on the scallop height, and the total polished surface area. Scallop height was calculated from geometrical expressions depending …

Numerical Calculation Of Diffraction Coefficients From Building Edges Using Fdtd Method, Weiting Cai

FIU Electronic Theses and Dissertations

Finite Difference Time Domain (FDTD) Method and software are applied to obtain diffraction waves from modulated Gaussian plane wave illumination for right angle wedges and Fast Fourier Transform (FFT) is used to get diffraction coefficients in a wideband in the illuminated lit region. Theta and Phi polarization in 3-dimensional, TM and TE polarization in 2-dimensional cases are considered respectively for soft and hard diffraction coefficients. Results using FDTD method of perfect electric conductor (PEC) wedge are compared with asymptotic expressions from Uniform Theory of Diffraction (UTD). Extend the PEC wedges to some homogenous conducting and dielectric building materials for diffraction …

A Study Of Response Surface In Simulation Of Emergency Room Systems, Daisy Correa

FIU Electronic Theses and Dissertations

The purpose of this research was to characterize a response surface with respect to the changes made to the input variables of an emergency room system. Response Surface Methodology (RSM) was used to identify the behavior of the response variable with respect to the changes made to the input variable. Several factors were examined for relevancy and significance for the purpose of experimentation. The findings of this research revealed that one factor (nurses) was very significant to the performance measures (time in the system). However, the interaction between the other factors also played an important role. It was determined that …

Trip Generation Study Of Gasoline Stations With Convenience Market, Quick Service Restaurant, And Car Wash In Miami-Dade County, Elio Roberto Espino

FIU Electronic Theses and Dissertations

The objectives of the thesis are twofold: (a) validation of trip generation rates for land use 846 (LU-846) published in ITE's Trip Generation Manual, and (b) the generation of trip generation models for a newly introduced land use, the gasoline station with convenience market, quick service restaurant and car wash. Data was collected at five sites representative of the new land use and the number of trips produced by the sites were compared with estimates made using the ITE rates for LU-846. The ITE rates were found to underestimate trip generation by 50% to 400%. Additionally, Multiple regression was performed …

Hardware-Software Integration For Particle Light Scatter Imaging, Christophe Pierre Godefroy

FIU Electronic Theses and Dissertations

The main purpose of this research is the implementation of a software interface. This interface shall allow the interpretation of particle size in a medium with respect to its diffraction patterns. The literature shows extensive work on the theory of light scattering but the experiments are cumbersome to implement. Some initial work has required the levitation of particle to isolate the difficulties associated with a flow environment. The purpose of this work; however, will focus on the software requirements to synchronize, collect and analyze light scattering patterns.

Although there are many other ways of sizing particles, it may be useful …

Microscopic Characterization Of Hydrocarbon-Polyelectrolyte Interactions During Coagulation, Vesna Dimitric Clark

FIU Electronic Theses and Dissertations

The purpose of this study was to investigate effectiveness of polyelectrolyte in removal of different hydrocarbons and to obtain information on settling velocity, size and density of the floe. Image analysis technique provided multilevel data concerning interactions between hydrocarbons and polyelectrolyte. Captured images were digitized, enhanced by numerous filtering techniques and examined. Additional, video-monitoring system was used to provide information on settling velocity of the floes. Results indicated that polyelectrolyte Cat-Floc 2953, in comparison to EB-5000, was more efficient in removal of all hydrocarbons, which was supported with turbidity measurements, GS analysis and microscopic analysis.

Tool Cutting Force Modeling And Wear Estimation Of Micro-End-Milling Operations, Wei-Yu Bao

FIU Electronic Theses and Dissertations

The applications of micro-end-milling operations have increased recently. A Micro-End-Milling Operation Guide and Research Tool (MOGART) package has been developed for the study and monitoring of micro-end-milling operations. It includes an analytical cutting force model, neural network based data mapping and forecasting processes, and genetic algorithms based optimization routines. MOGART uses neural networks to estimate tool machinability and forecast tool wear from the experimental cutting force data, and genetic algorithms with the analytical model to monitor tool wear, breakage, run-out, cutting conditions from the cutting force profiles.

The performance of MOGART has been tested on the experimental data of over …

A Simulation-Based Decision Support System For Evaluating Operating Policies In An Emergency Room Facility, Adriana M. Alvarez

FIU Electronic Theses and Dissertations

Increased pressure to control costs and increased competition has prompted health care managers to look for tools to effectively operate their institutions. This research sought a framework for the development of a Simulation-Based Decision Support System (SB-DSS) to evaluate operating policies. A prototype of this SB-DSS was developed. It incorporates a simulation model that uses real or simulated data. ER decisions have been categorized and, for each one, an implementation plan has been devised. Several issues of integrating heterogeneous tools have been addressed. The prototype revealed that simulation can truly be used in this environment in a timely fashion because …

Analysis Of Dual-Gripper Manipulators And Finite Element Analysis Of The Flexible Laminated Hose For Underground Storage Tank Cleanup, Badrinath Srikanth Eluri

FIU Electronic Theses and Dissertations

The second generation long-reach manipulator - the dual-gripper Phase 3 Remote Tool Delivery (RTD) system has been developed to retrieve radioactive waste from underground storage tanks with internal structural members. The RTD is equipped with two grippers, one at each end of the system, to grasp the structural member. A vertical translation mechanism is also added to the system that enables the vertical motion inside the tank. This special feature provides greater dexterity and flexibility. Two operating open-chain configurations are considered and modeled. The first configuration is that gripper 1 grasps the structural member and gripper 2 is free to …