No description available.

No description available.

No description available.

The purpose of this project is to implement an integrated piece of software consisting of a number of graphics programs that support mathematical computation and experimentation in dynamical systems.

published_or_final_version / abstract / Computer Science / Doctoral / Doctor of Philosophy

published_or_final_version / Computer Science / Master / Master of Philosophy

Approved for public release; distribution is unlimited. / The objective of the ongoing MARG project is to animate human motions captured by 15 MARG sensors in wireless networked virtual environment (NVES). Three avatars were developed previously, but none of them met all the desired requirements. The first one was overly simplistic and did not implement H-Anim standards. The other two were created using laser-scanned data and followed the H-Anim standards, but one had its adjacent joints broken and the other was capable of rotating only one joint. Therefore, the cartoon-type humanoid, Andy, was developed to meet the needs of the MARG project. The humanoid Andy implements H-Anim standards using built-in X3D humanoid nodes and is capable of controlling all its 15 joints in NVES. Another need of the MARG project was a wireless network interface for real-time data streaming. A concurrent client-server program implementing multicasting using TCP and UDP protocols was developed for this purpose. Using WiSER2400.IP serial adapters between the MARG sensors and the server program adds a wireless capability to the project. The server program converts the raw MARG sensor data to quaternions using the Quest algorithm. Multiple clients are supported by the system. Each client program receives the motion data and updates the humanoid Andy. / Lieutenant Junior Grade, Turkish Navy

We survey and compare the different major mechanisms for embedding the relational database language SQL in object-oriented programming languages such as Java and C#, with regard to how much impedance mismatch these embeddings suffer. Here impedance mismatch refers to clarity and performance difficulties that arise because of the nature of the embedding. Because of the central position in the information technology industry of object-oriented programs that access SQL-based relational database systems, reducing impedance mismatch is generally recognized in that industry as an important practical problem. We argue for the suitability of SQL as a database language, and hence for the desirability of keeping SQL as the view provided by a SQL embedding. We make the case that SQLJ, a SQL embedding for Java in which it appears that Java directly supports SQL commands, is the kind of SQL embedding that suffers the least impedance mismatch, when compared with call-level interfaces and object-relational mappings. We propose extensions to SQLJ that would reduce its impedance mismatch even further. / by Jose Luis Hurtado. / Thesis (M.S.C.S.)--Florida Atlantic University, 2012. / Includes bibliography. / Mode of access: World Wide Web. / System requirements: Adobe Reader.

"As software systems become more complex, so does the task of understanding them. To modify even a simple component of a complex system, at least a rudimentary understanding of the structure and behavior of the whole system is necessary. Although currently available development tools can provide a static representation of a complex system, these utilities are severely limited and prohibitively expensive. As a result, most programmers working on large software systems today resort to classic debuggers and time-consuming plain-text searches through hundreds or thousands of source files. This proposal describes a software development environment that uses static representations of hierarchically structured source code side by side with dynamic visualizations of software systems as they run. This environment provides an intuitive, visual means of easily comprehending complex systems, and has been provided as an open-source development tool for both professionals and students of software engineering."

There are many tools and techniques to help developers debug and test their programs. Dynamic data flow analysis is such a technique. Existing approaches for performing dynamic data flow analysis for object oriented programs have tended to be data focused and procedural in nature. An approach to dynamic data flow analysis that used object oriented principals would provide a more natural solution to analysing object oriented programs. Dynamic data flow analysis approaches consist of two primary aspects; a model of the data flow information, and a method for collecting action information from a running program. The model for data flow analysis presented in this thesis uses a meta-level object oriented approach. To illustrate the application of this meta-level model, a model for the Java programming language is presented. This provides an instantiation of the meta-level model provided. Finally, several methods are presented for collecting action information from Java programs. The meta-level model contains elements to represent both data items and scoping components (i.e. methods, blocks, objects, and classes). At runtime the model is used to create a representation of the executing program that is used to perform dynamic data flow analysis. The structure of the model is created in such a way that locating the appropriate meta-level entity follows the scoping rules of the language. In this way actions that are reported to the meta-model are routed through the model to their corresponding meta-level elements. The Java model presented contains classes that can be used to create the runtime representation of the program under analysis. Events from the program under analysis are then used to update the model. Using this information developers are able to locate where data items are incorrectly used within their programs. Methods for collecting action information from Java programs include source code instrumentation, as used in earlier approaches, and approaches that use Java byte code transformation, and the facilities of the Java Platform Debugger Architecture. While these approaches aimed to achieve a comprehensive analysis, there are several issues that could not be resolved using the approaches covered. Of the approaches presented byte code transformation is the most practical.