Digital Commons Network^™

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 …

Object Interaction In A Parallel Object-Oriented Discrete-Event Simulation, Walter G. Trachsel

Theses and Dissertations

This thesis investigates object interaction issues involved in developing an object-oriented parallel discrete-event simulation and develops a simulation model that provides object interaction capabilities. The research covers issues in object representation, object interaction, object management. discrete-event simulation, and parallel simulation. There are three primary types of objects that the research discusses. The first type is a basic simulation object, whose size and behavior is insignificant compared to the size of the simulation as a whole. The second type is an aggregate object which consists of smaller component objects that interact and affect the performance of the larger object as a …

Graphical Tools For Situational Awareness Assistance For Large Battle Spaces, Brian B. Soltz

Theses and Dissertations

As virtual environments grow in complexity and size, users are increasingly challenged in assessing situations in large-scale virtual environment. This occurs because of the difficulty in determining where to focus attention and assimilating and assessing the information as it floods in. One technique for providing this type of assistance is to provide the user with a first-person, immersive, synthetic environment observation post, that permits unobtrusive observation of the environment without interfering with the activity in the environment. However, for large, complex synthetic environments, this type of support is not sufficient because the portrayal of raw, unanalyzed data in the virtual …

Object-Oriented Design And Implementation Of A Parallel Ada Simulation System, James T. Belford

Theses and Dissertations

Simulations which model the behavior real world entities are often large and complex, and require frequent changes to the configuration. This research effort examines the benefits of using object-oriented techniques to develop a distributed simulation environment which supports modularity, modifiability, and portability. The components of the Parallel Discrete Event Simulation PDES environment are identified and modeled using the Rumbaugh modeling technique. From the model, a prototype implementation of a Parallel Ada Simulation Environment PASE is accomplished using Classic Ada. A system interface for the Intel ipsc2 Hypercube was developed to illustrate the concepts of modularity and portability. In addition, the …

Object Oriented Design Of Petri Net Simulator, Himanshu Juneja

Theses

Petri nets are highly useful for modeling discrete event dynamic systems. The objective of this effort is to develop a tool for drawing, editing and simulating Petri nets using object oriented programming on a standard platform. The object oriented approach was chosen because of its code reuse and extendability features which simplify the task of adding features to the tool as the model evolves. The design stresses on modeling of the problem by objects which closely relate the system design with the implementation.

C++ is used for implementing the object oriented design, and the XView toolkit is used for building …

On The Automation Of Object-Oriented Requirements Analysis, Nancy L. Crowley

Theses and Dissertations

The research investigated the possibility that an object-oriented requirements analysis (OORA) specification model can be represented in a computer system and used as a basis for the elicitation of the information necessary for the development of an object-oriented specification for a particular problem. The proof-of-concept system developed is called the OORA automated Knowledge System (OAKS). OAKS contains a generic domain model that is modified to satisfy a particular problem in the domain. The core of OAKS is a reusable domain model, which represents a domain of interest. The domain model is used as a basis for user changes that are …

Implementation Of An Object-Oriented University Database Using Vodak/Vml Prototype-2/C++, Bheeman Lingan, Madhumathi Tulasiram

Theses

Object-oriented database (OODB) technology has become very popular and successful in recent years. Currently, there are many commercial object-oriented database systems available that are used for developing large and complex real world applications. In addition, there are many research prototypes of object-oriented databases available. In a joint research project of the CIS Dept at NJIT and GMD-IPSI an object-oriented data model called the Dual Model was developed. Using this Dual Model a university environment database schema was designed. This univesity database schema was implemented using the VODAK/VML OODB prototype - 1. The university database was then reimplemented using the C++ …

Difficulties Experienced Procedural Programmers Encounter When Transferring To An Object-Oriented Programming Paradigm, Scott Andrew Machaffie

Dissertations and Theses

Experienced procedural programmers seem to have difficulty when transferring from a procedural language to an object-oriented language. The problem is how to assist the experienced procedural programmers to make this shift. The long term goal of this research is to identify areas where programmers have problems and to develop an automated system to help them overcome these difficulties.

This study examines the class designs produced by procedural programmers and the effect of specifications and domain knowledge on class designs. Two types of specifications were used: those written from a procedural point of view which emphasized the functions and those written …

Effect Of Partially Valid Emergent Features On Fault Detection Performance With Object Displays, Ravi Shankarnarayan Adapathya

Graduate Theses and Dissertations

No abstract provided.

An Object Oriented Domain Analysis Of Ecosystem Modeling, Ronald Lee Righter

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

Object-Oriented Method For Graphical User Interface Design In A Distributed System Environment, Li Sun Zheng

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

Object-Oriented Model With Efficient Algorithms For Identifying And Merging Raster Polygons, Jin Guo

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.