Digital Commons Network^™

Modeling Cpu Utilization And Network Traffic In A Distributed Interactive Simulation System Using Discrete Event Simulation, Shreyas Shridhar Purohit

Theses

No abstract provided.

Increasing Patient Flow And Resource Utilization In A Multidisciplinary Cancer Clinic., Joseph Robert Brandner

Electronic Theses and Dissertations

The following paper discusses a computer simulation of a multidisciplinary cancer clinic the Brown Cancer Center (BCC) of Louisville, KY. Increased caseload and decreasing resources were two of the driving factors for the study. One option chosen to drive improvement was the application of discrete event simulation (DES) tools to smooth clinic operations. Management was primarily interested in this tool, for two reasons 1) staff discussion was discovering many symptoms of a malfunctioning system, but no cause and 2) to understand what data currently collected could describe the operational characteristics of the system. At completion of the analysis several recommendations …

Feasibility Study Of Variance Reduction In The Logistics Composite Model, George P. Cole Iii

Theses and Dissertations

The Logistics Composite Model (LCOM) is a stochastic, discrete-event simulation that relies on probabilities and random number generators to model scenarios in a maintenance unit and estimate optimal manpower levels through an iterative process. Models such as LCOM involving pseudo-random numbers inevitably have a variance associated with the output of the model for each run, and the output is actually a range of estimates. The reduction of the variance in the results of the model can be costly in the form of time for multiple replications. The alternative is a range of estimates that is too wide to realistically apply …

Design Factors For The Communication Architecture Of Distributed Discrete Event Simulation Systems, Catharine Mcintire Hoaglund

Theses Digitization Project

The purpose of the thesis was to investigate the influence communication architecture decisions have on the performance of a simulation system with distributed components. In particular, the objective was to assess the relative importance of factors affecting reliability and variability of an external data interface to the performance of the simulation, as compared to factor within the simulation itself.

A Visual Language For Composable Simulation Scenarios, Carolyn R. Bartley

Theses and Dissertations

Modeling and Simulation plays an important role in how the Air Force trains and fights, Scenarios are used in simulation to give users the ability to specify entities and behaviors that should be simulated by a model: however, building and understanding scenarios can be a difficult and time-consuming process, furthermore, as composable simulations become more prominent, the need for a common descriptor for simulation scenarios has become evident. In order to reduce the complexity of creating and understanding simulation scenarios, a visual language was created, The research on visual languages presented in this thesis examines methods of visually specifying the …

Simworx: An Ada Distributed Simulation Application Framework Supporting Hla And Dis, Earl C. Pilloud

Theses and Dissertations

This research consisted of the analysis, design, and implementation of a reusable application framework for distributed simulation which is compliant with both the DoD High Level Architecture (HLA) for Modeling and Simulation and the Distributed Interactive Simulation (DIS) standards. The goal was to create an Ada-based system for experimentation in distributed simulation. A subsidiary goal was to integrate the system with an existing Air Force Institute of Technology (AFIT) application framework for virtual simulations, Easy_Sim. The application framework was designed using object oriented techniques to enable experimenters to customize it via inheritance extension. The application framework, named SimWorx, consists of …

Objectism 3.0: A Software Architecture For The Development Of Portable Visual Simulation Applications, Shawn M. Hannan

Theses and Dissertations

A visual simulation software architecture is a reusable design for visual simulation applications. This thesis effort was the third stage in an ongoing refinement of such an architecture, named ObjectSim. The primary goals of this stage were to improve the architecture by eliminating its dependence on two platform-specific graphics libraries (named GL and Performer, from Silicon Graphics, Inc.), and to examine the potential for expanding the architecture to accommodate distributed simulations. The effort resulted in a new version of the architecture which allows the development of visual simulation applications which take full advantage of the aforementioned libraries without calling those …

A Simulation To Model Direct Access Storage Device (Dasd) Performance, Kathleen Michele Hibson

Graduate Theses and Dissertations

With the vast amounts of data being collected, analyzed and stored for today’s information highway, the type and quantity of computer equipment storage media has become critical to the cost of operating a computer data service center. Processor storage is obviously the most desirable medium from a performance perspective, however, it is also the most costly. The other extreme is off-line storage such as a tape cartridge system, which is the most inexpensive method but leaves much to be desired with respect to user response time. A reasonable alternative is DASD. In fact, in many installations the “DASD farm” is …

Objectsim - A Reusable Object Oriented Dis Visual Simulation, Mark I. Snyder

Theses and Dissertations

This research designed and implemented a reusable Distributed Interactive Simulation DIS visual simulation architecture for Silicon Graphics platforms. The goal was to research software architecture technologies and to create a design and implementation using these ideas. The architecture was designed using object oriented techniques to provide the ability to customize it via inheritance extension. The resulting design was implemented using C and applied to several DIS visual simulation projects in the Graphics Lab at AFIT. The architecture, named ObjectSim, was successful in its goal of providing a reusable core for the DIS visual simulation projects in the Graphics Lab at …

Applications Of Digital Signal Processing With Cardiac Pacemakers, Merry Thi Tran

Dissertations and Theses

Because the voltage amplitude of a heart beat is small compared to the amplitude of exponential noise, pacemakers have difficulty registering the responding heart beat immediately after a pacing pulse. This thesis investigates use of digital filters, an inverse filter and a lowpass filter, to eliminate the effects of exponential noise following a pace pulse. The goal was to create a filter which makes recognition of a haversine wave less dependent on natural subsidence of exponential noise.

Research included the design of heart system, pacemaker, pulse generation, and sensor system simulations. The simulation model includes the following components:

• Signal source, …

Estimating Computer Communication Network Performance Using Network Simulations, Albert B. Garcia

Graduate Theses and Dissertations

No abstract provided.

Computer Aided Process Simulation And Design, Richard Bradley Vinkovich

Graduate Theses and Dissertations

No abstract provided.

A Comparison Of A Gasp And A Gpss Simulation Of An Avl Operational System, Barry Walden Dupuis

Retrospective Theses and Dissertations

The purpose of this research report is to compare two simulation languages; GASP and GPSS. An economical comparison was performed by simulating the same system in each language and examine parameters such as run time, core size, program time, and debug time. A statistical comparison of the results of the system simulation was also performed using a 90% confidence level testing procedure. The system simulated was the proposed Orlando Police Department Automatic Vehicle Locator (AVL) Operational System.

Double Simulation Of A Data Communications System, Gregory James Barker

Graduate Theses and Dissertations

No abstract provided.

Monte Carlo Simulation Of Powder Metal Products Factory, John Matthew Lucas

Graduate Theses and Dissertations

No abstract provided.

Conversion And Validation Of Sigart Program, A Progressive Traffic Signal Lights System Computer Model, Dennis F. Troyan

Retrospective Theses and Dissertations

The purpose of this research paper was to translate a Computer Model (SIGART), capable of simulating a progressive traffic signal lights system, from Burroughs B5500 FORTRAN II to the IBM 360 FORTRAN IV computer language, to outline the program algorithm, to set up detailed program documentation and to validate this model by applying practical system data. Expansion of the SIGART program by addition of an option to produce a time space plot of the output data utilizing a Calcomp plotter was also to be considered.

A Behavioristic Approach To The Design Of A Digital Model Of Human Communication, George Eugene Whitley

Dissertations and Theses

The purpose of this study was to determine whether individual communication behavior can be simulated by a digital model.

Digital Simulation Of A Serial Binary Arithmetic System, Avninder Kumar Kalra

Graduate Theses and Dissertations

No abstract provided.

Digital Computer Simulation Of A Design Concept For Tracking Radiometers, Frederick Paul Blommel

Graduate Theses and Dissertations

No abstract provided.