Thesis (M.A.) - Carleton University, 2005. / Includes bibliographical references (p. 128-139). Also available in electronic format on the Internet.

Report (M.I.S.)--Virginia Polytechnic Institute and State University, 1993. / Includes bibliographical references (leaf 88). Also available via the Internet.

Thesis (Ph. D.)--University of Florida, 1998. / Typescript. Vita. Includes bibliographical references (leaves 115-118). Full text also available from UMI Current Research @ database; Adobe Acrobat Reader required to display text; see LINKS to connect

Thesis (Ph. D.)--Illinois State University, 2005. / Title from title page screen, viewed September 22, 2006. Dissertation Committee: James Kalmbach (chair), Ron Fortune, Doug Hesse. Includes bibliographical references (leaves 156-160) and abstract. Also available in print.

M.Sc. (Computer Science) / In this dissertation we propose extensions to the Self Protecting Object (SPO) model to facilitate the sharing of information in a more effective manner. We see the sharing ofinformation as the sharing of objects that provide services. Sharing objects effectively is allowing the objects to be used in a secure environment, independent of their location, in a manner usage was intended. The SPO model proposed by Olivier [32] allows for objects in a federated database to be moved from one site to another and ensures that the security policy of the object will always be respected and implemented, regardless of its location. Although the SPO model does indeed allow for objects (information) to be shared effectively, it fails to address issues of maintaining integrity within objects. We therefore define the notion of maintaining integrity within the spa model and propose a model to achieve it. We argue that ensuring an SPO is only used in a way usage was intended does not suffice to ensure integrity. The model we propose is based on ensuring that modifications to an SPO are only executed if the modification does not violate the constraints defined for the Sf'O, The model" allows for an spa to maintain its unique identity in addition to maintaining its integrity. The SPO model is designed to be used in a federated database on sites that are stationary. Therefore, having addressed the issue of maintaining integrity within SPOs on stationary sites in the federated database, we then introduce the notion of a mobile site: a site that will eventually disconnect from the federated database and become unreachable for some time. Introducing the mobile site into the federated database allows us to propose the Mobile Self Protecting Object (MSPO) and its associated architecture. Because of the nature of mobile sites, the original model for maintaining integrity can not be applied to the MSPO architecture. We therefore propose a mechanism (to be implemented in unison with the original model) to ensure the integrity of MSPOs on mobile sites. We then discuss the JASPO prototype. The aim of the prototype was to determine if the Self Protecting Object model was feasible using current development technologies. We examine the requirements identified in order for the prototype to be successful and discuss how these were satisfied. Several modifications were made to the original spa model, including the addition of a new module and the exclusion of others, we discuss these modifications and examine why they were necessary.

M.Sc. / In a society that is becoming increasingly reliant on information, it is necessary for information to be stored efficiently and safely. Database technology is used to store large chunks of information efficiently, while database security is concerned with storing information securely. More complex computer applications (CAD/CAM, multimedia and Groupware) led to then development of object-oriented programming, with object-oriented databases following shortly after. Object-oriented databases store the data of object-oriented systems efficiently and permanently. They provide a rich set of semantic structures that allows them to be used in applications where other database models are simply inadequate. In federations consisting of several interconnected databases, security plays a vital role in the proper management of information. This work describes a Secure Distributed Object Environment (SDOE) infrastructure. It is designed to be implementation-oriented, on which strict theoretic prototypes such as SPOP (Selfprotecting Object Prototype) can be built. SPOP is a prototype of a secure object-oriented database and is based on the SPO database model of Olivier. To describe federated database architectures (used by SDOE and SPOP), it is necessary to understand the architecture of federated database systems. Reference architectures for federated database systems are discussed first and a comparison is drawn between two prominent reference architectures. We proposed a generalised reference architecture based on these two architectures. created in order to make the use of object-oriented programming in a distributed environment as problem free as possible. A marshal buffer structure will be discussed thirdly. The latter structure is used to contain procedure parameters during an RPC (Remote Procedure Call). Fourthly, the communications infrastructure necessary to support higher-level services is discussed. The infrastructure is implemented in Linux (a UNIX variant), and this approach has provided several interesting challenges. The fifth discussion will deal with the requirements for a name service. A name service is necessary if objects were to be used transparently (without reference to their current locations in the federation).

D.Phil. (Computer Science) / The need for security in a database is obvious. Object-orientation enables databases to be used in applications where other database models are not adequate. It is thus clear that security of object-oriented databases must be investigated...

Current commercial measurement systems are used primarily for performing measurements and recording data. Measurement users either expend extra effort to store and maintain other measurement information (metadata) or to customize the measurement system to make it functionally complete. A software measurement environment using advanced data management techniques in an open architecture seems highly desirable. To create such an environment, a Display Measurement and Analysis System (DMAS) was designed and constructed using the object-oriented paradigm and object-oriented database (OODB) management techniques. The purpose of the system is to serve as a testbed for new generation measurement systems and for overcoming the limitations of conventional systems. This thesis proposes a new object data model for display measurement and analysis applications. The components of this data model are object classes. The generation of the data model involved four steps, dealing with: objects and classes at given level of abstractions, semantics, and relationships. A prototype system based on the above model has been developed. It used an object data management system as the support of persistent object storage. The development of DMAS database management subsystem consists of construction of an object schema and an object management interface. The research work illustrates that the OODB approach facilitates scientific measurement by capturing metadata and data together explicitly and flexibly. Furthermore, it show thats OODB has the ability to represent complex semantics, to associate objects with metadata, and to map a lucid interface easily to objects. / Master of Science

M.Sc. (Computer Science) / This report is primarily concerned with highlighting fmdings of a research recently undertaken towards completing the requirements for the M.Sc. degree of 1994 at the Rand Afrikaans University (RAU). The research is aimed at striving to investigate what benefits (if any) exist in Object-Oriented Parallel Systems. The area of research revolves around the Object-Oriented Parallel Paradigm (OOPP) which is currently under development by the author. One primary aim of this research is to investigate numerous current trends in Object-Oriented Parallel Systems and Language Developments with the objective of providing an indication as to whether the Object-Oriented methodology can be (or has been) successfully married with existing Parallel Processing mechanisms. New benefits may come about while attempting to combine these methodologies, and this expectation will also be reflected upon. The Object-Oriented methodology allows a system designer the ability to approach a problem with a good degree of problem space understanding; while Parallel Processing allows the system designer the ability to create extremely fast algorithms for solving problems amenable to Parallel Processing techniques. The question we attempt to answer is whether the Object-Oriented methodology can be successfully married to the Parallel Processing field (whilst maintaining a high degree of benefits encountered in both methodologies) so as to gain the best of both worlds. Certain papers have laid claim to their proposed system encompassing both the Object-Oriented methodology, as well as the Parallel Processing methodology. In view of this fact, we shall furthermore examine papers to see if any of these systems are candidates for successfully marrying Object-Oriented and Parallel Processing into one homogeneous body. Criticism will be given on the shortcomings of unsuccessful candidates. Based on the findings of the research, the report will culminate to the proposal of the Object-Oriented Parallel Paradigm (OOPP). OOPP will speculate on the most probable features that system designers can expect to see in an almost ideal Object-Oriented Parallel System. It is very important at this stage to mention that, at its current state of development, OOPP is only a paradigm; thus OOPP should be viewed merely as an abstract model intended to establish a solid foundation for building more formal Object-Oriented Parallel Methodologies. Furthermore, OOPP is intended to be suitable for present day systems and amenable (possibly with a few minor adjustments) to future systems. The author trusts OOPP to generate sufficient interest to warrant further research being commissioned. In this event, OOPP should be expected to undergo modifications and enhancements...

Thesis (M.S. in Computer Science)--Naval Postgraduate School, December 2003. / Thesis advisor(s): Bill Ray, Shing Man Tak. Includes bibliographical references (p. 215). Also available online.