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In our original proposal we stated that our research would 'develop a novel technology that provides a foundation for collaborative information processing.' The essential ingredient of this technology is the notion of 'deltas,' which are first-class values representing collections of proposed updates to a database. The Heraclitus framework provides a variety of algebraic operators for building up, combining, inspecting, and comparing deltas. Deltas can be directly applied to the database to yield a new state, or used 'hypothetically' in queries against the state that would arise if the delta were applied. The central point here is that the step of elevating deltas to 'first-class' citizens in database programming languages will yield tremendous leverage on the problem of supporting updates in collaborative information processing. In short, our original intention was to develop the theoretical and practical foundation for a technology based on deltas in an object- oriented database context, develop a toolkit for active object-oriented databases, and apply this toward collaborative information processing.

This paper describes a replication algorithm for distributed real-time object-oriented databases in a static environment. All data requirements are specified a priori, and the algorithm creates replication transactions that copy remote data to a local site in order to guarantee that every data request reads temporally valid data. The algorithm conditions are proven to be necessary and sufficient for providing this guarantee. Test results indicate that under most conditions, this replication strategy is better than total replication, which is a typical strategy used in distributed databases.

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Click here to view the University of Florida catalog record

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A Database Management System (DBMS) is system software for managing a large amount of data in secondary memory. The standard DBMS used today in both industry and the military is the Relational DBMS (RDBMS). The RDBMS is based upon the relational paradigm, whereas modern software development technologies that interact with the RDBMS are based upon the object-oriented paradigm. This difference in paradigms presents a conceptual mismatch which greatly reduces programmer and developer productivity. Additionally, wireless handheld devices have become ubiquitous both in the military and in the community at large. These handheld devices provide a convenient means of information access. To date, the military has failed to capitalize on the use of handheld devices as a convenient means of information access with respect to the large amounts of information stored in its databases. This thesis investigates various database application architectures and proposes an architecture that will not only overcome the conceptual mismatch between the relational and object-oriented paradigms, but also allows handheld device access to the database. A proof-of-concept prototype database application that provides handheld device access to a military personnel database is built to show the viability of the proposed architecture.

A Database Management System (DBMS) is system software for managing a large amount of data in secondary memory. The standard DBMS used today in both industry and the military is the Relational DBMS (RDBMS). The RDBMS is based upon the relational paradigm, whereas modern software development technologies that interact with the RDBMS are based upon the object-oriented paradigm. This difference in paradigms presents a conceptual mismatch which greatly reduces programmer and developer productivity. Additionally, wireless handheld devices have become ubiquitous both in the military and in the community at large. These handheld devices provide a convenient means of information access. To date, the military has failed to capitalize on the use of handheld devices as a convenient means of information access with respect to the large amounts of information stored in its databases. This thesis investigates various database application architectures and proposes an architecture that will not only overcome the conceptual mismatch between the relational and object-oriented paradigms, but also allows handheld device access to the database. A proof-of-concept prototype database application that provides handheld device access to a military personnel database is built to show the viability of the proposed architecture.

Computer-aided Acquisition and Logistic Support (CALS) is a Department of Defense (DoD) and Industry strategy to transition from paper- intensive acquisition and logistic processes to a highly automated and integrated mode of weapon system acquisition and operation. A newly demonstrated technology in the context of the CALS initiative is the Interactive Electronic Technical Manual (IETM), which is a portable computer system developed for use of technicians maintaining weapon systems. The introduction of IETM systems will relieve the technician from the need to carry extensive volumes of hardcopy technical manuals, provide him with easy interactive access to the required technical data and is expected to have a profound impact on the way weapon systems maintenance is conducted and the costs associated with it. Object Oriented Database Management Systems (OODBMS) is a new technology that marries the characteristics of object-oriented programming languages and data persistence provided by database systems. This thesis explores issues related to the utilization of OODBMS for the implementation of IETM databases, discusses the benefits of this approach and addresses some architectural issues of OODBMS in the context of IETM implementation.

During the past three decades, many organizations have seen a dramatic proliferation of a variety of information systems. Organizations soon discovered the need to access and share data across these different information systems. Under current technology, this integration is usually not possible due to the heterogeneity of information systems. One level of heterogeneity is that of semantics. The objective of this thesis is to build a framework for enumerating, classifying, and resolving the types of semantic heterogeneity that could exist in an object-oriented database model. The framework covers both schema and data content conflicts. The schema conflicts are classified broadly by the level at which they occur. The primary data conflicts covered include inconsistencies and different representations for the same data.

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Includes bibliographies and index

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Thesis advisor, Magdi Kamel

Thesis advisor, Magdi Kamel

Computer-aided Acquisition and Logistic Support (CALS) is a Department of Defense (DoD) and Industry strategy to transition from paper-intensive acquisition and logistic processes to a highly automated and integrated mode of weapon system acquisition and operation. A newly demonstrated technology in the context of the CALS initiative is the Interactive Electronic Technical Manual (IETM), which is a portable computer system developed for the use of technicians maintaining weapon systems. The introduction of IETM systems will relieve the technician from the need to carry extensive volumes of hardcopy technical manuals, provide him with easy interactive access to the required technical data and is expected to have a profound impact on the way weapon systems maintenance is conducted and the costs associated with it. Object-Oriented Database Management Systems (OODBMS) is a new technology that marries the characteristics of object-oriented programming languages and data persistence provided by database systems. This thesis explores issues related to the utilization of OODBMS for the implementation of IETM databases, discusses the benefits of this approach and addresses some architectural issues of OODBMS in the context of IETM implementation.

Computer-aided Acquisition and Logistic Support (CALS) is a Department of Defense (DoD) and Industry strategy to transition from paper-intensive acquisition and logistic processes to a highly automated and integrated mode of weapon system acquisition and operation. A newly demonstrated technology in the context of the CALS initiative is the Interactive Electronic Technical Manual (IETM), which is a portable computer system developed for the use of technicians maintaining weapon systems. The introduction of IETM systems will relieve the technician from the need to carry extensive volumes of hardcopy technical manuals, provide him with easy interactive access to the required technical data and is expected to have a profound impact on the way weapon systems maintenance is conducted and the costs associated with it. Object-Oriented Database Management Systems (OODBMS) is a new technology that marries the characteristics of object-oriented programming languages and data persistence provided by database systems. This thesis explores issues related to the utilization of OODBMS for the implementation of IETM databases, discusses the benefits of this approach and addresses some architectural issues of OODBMS in the context of IETM implementation.

Computer-aided Acquisition and Logistic Support (CALS) is a Department of Defense (DoD) and Industry strategy to transition from paper-intensive acquisition and logistic processes to a highly automated and integrated mode of weapon system acquisition and operation. A newly demonstrated technology in the context of the CALS initiative is the Interactive Electronic Technical Manual (IETM), which is a portable computer system developed for the use of technicians maintaining weapon systems. The introduction of IETM systems will relieve the technician from the need to carry extensive volumes of hardcopy technical manuals, provide him with easy interactive access to the required technical data and is expected to have a profound impact on the way weapon systems maintenance is conducted and the costs associated with it. Object-Oriented Database Management Systems (OODBMS) is a new technology that marries the characteristics of object-oriented programming languages and data persistence provided by database systems. This thesis explores issues related to the utilization of OODBMS for the implementation of IETM databases, discusses the benefits of this approach and addresses some architectural issues of OODBMS in the context of IETM implementation.

In our original proposal we stated that our research would 'develop a novel technology that provides a foundation for collaborative information processing.' The essential ingredient of this technology is the notion of 'deltas,' which are first-class values representing collections of proposed updates to a database. The Heraclitus framework provides a variety of algebraic operators for building up, combining, inspecting, and comparing deltas. Deltas can be directly applied to the database to yield a new state, or used 'hypothetically' in queries against the state that would arise if the delta were applied. The central point here is that the step of elevating deltas to 'first-class' citizens in database programming languages will yield tremendous leverage on the problem of supporting updates in collaborative information processing. In short, our original intention was to develop the theoretical and practical foundation for a technology based on deltas in an object-oriented database context, develop a toolkit for active object-oriented databases, and apply this toward collaborative information processing.

In our original proposal we stated that our research would 'develop a novel technology that provides a foundation for collaborative information processing.' The essential ingredient of this technology is the notion of 'deltas,' which are first-class values representing collections of proposed updates to a database. The Heraclitus framework provides a variety of algebraic operators for building up, combining, inspecting, and comparing deltas. Deltas can be directly applied to the database to yield a new state, or used 'hypothetically' in queries against the state that would arise if the delta were applied. The central point here is that the step of elevating deltas to 'first-class' citizens in database programming languages will yield tremendous leverage on the problem of supporting updates in collaborative information processing. In short, our original intention was to develop the theoretical and practical foundation for a technology based on deltas in an object-oriented database context, develop a toolkit for active object-oriented databases, and apply this toward collaborative information processing.

This research proposes and evaluates a methodology for reengineering a relational database to an object-oriented database. We applied this methodology to reengineering the Air Force Institute of Technology Student Information System (AFITSIS) as our test case. With this test case, we could verify the applicability of the proposed methodology, especially because AFITSIS comes from an old version of Oracle RDBMS. We had the opportunity to implement part of the object model using an object-oriented database, and we present some peculiarities encountered during this implementation. The most important result of this research is that it demonstrated that the proposed methodology can be used for reengineering an arbitrarily selected relational database to an object-oriented database. It appears that this approach can be applied to any relational database.

A model-based approach to identifying and finding the orientation of non-overlapping parts on a tray has been developed. The part models contain both exact and fuzzy descriptions of part features, and are stored in an object-oriented database. Full identification of the parts involves several interacting tasks each of which is handled by a distinct agent. Using fuzzy information stored in the model allowed part features that were essentially at the noise level to be extracted and used for identification. This was done by focusing attention on the portion of the part where the feature must be found if the current hypothesis of the part ID is correct. In going from one set of parts to another the only thing that needs to be changed is the database of part models. This work is part of an effort in developing a Vision Advisor System (VAS) that combines agents and objected-oriented databases.

A model-based approach to identifying and finding the orientation of non-overlapping parts on a tray has been developed. The part models contain both exact and fuzzy descriptions of part features, and are stored in an object-oriented database. Full identification of the parts involves several interacting tasks each of which is handled by a distinct agent. Using fuzzy information stored in the model allowed part features that were essentially at the noise level to be extracted and used for identification. This was done by focusing attention on the portion of the part where the feature must be found if the current hypothesis of the part ID is correct. In going from one set of parts to another the only thing that needs to be changed is the database of part models. This work is part of an effort in developing a Vision Advisor System (VAS) that combines agents and objected-oriented databases.

In our original proposal we stated that our research would 'develop a novel technology that provides a foundation for collaborative information processing.' The essential ingredient of this technology is the notion of 'deltas,' which are first-class values representing collections of proposed updates to a database. The Heraclitus framework provides a variety of algebraic operators for building up, combining, inspecting, and comparing deltas. Deltas can be directly applied to the database to yield a new state, or used 'hypothetically' in queries against the state that would arise if the delta were applied. The central point here is that the step of elevating deltas to 'first-class' citizens in database programming languages will yield tremendous leverage on the problem of supporting updates in collaborative information processing. In short, our original intention was to develop the theoretical and practical foundation for a technology based on deltas in an object-oriented database context, develop a toolkit for active object-oriented databases, and apply this toward collaborative information processing.

Many object-oriented databases marketed today target themselves to either C++ or Lisp as a host language. This presents problems to Department of Defense contractors who need to utilize Ada for development. This paper examines two Ada object-oriented databases: Classic-Ada with Persistence and Science Applications International Corporation's OODBMS developed for the US Air Force's Dental Data System.... Ada, Object-Oriented databases.

This report concentrates on implementation issues associated with the security model for object-oriented databases. The discussion of model is conducted from the implementation point of view. Certain characteristics the model possesses, make its implementation a conceptually simple matter. Two alternative approaches to the subject of implementation are analyzed. Finally, the requirements the model places on the implementation of the object layer are explained in detail. Keywords: TDI(Trusted Database Implementation), Message filtering algorithms, Information flows.

An object-oriented design methodology, such as the object modeling technique (OMT) of Rumbaugh et al., not only unifies database design with applications software design, it abstracts the design process and supports implementation regardless of the data model used.

CERN's (European Organization for Nuclear Research) WISDOM project uses XML for the replication of data between different data repositories in a heterogeneous operating system environment. For exchanging data from Web-resident databases, the data needs to be transformed into XML and back to the database format. Many different approaches are employed to do this transformation. This paper addresses issues that make this job more efficient and robust than existing approaches. It incorporates the World Wide Web Consortium (W3C) XML Schema specification in the database-XML relationship. Incorporation of the XML Schema exhibits significant improvements in XML content usage and reduces the limitations of DTD-based database XML services. Secondly the paper explores the possibility of database independent transformation of data between XML and different databases. It proposes a standard XML format that every serialized object should follow. This makes it possible to use objects of heterogeneous database seamlessly using XML.

During the past three decades, many organizations have seen a dramatic proliferation of a variety of information systems. Organizations soon discovered the need to access and share data across these different information systems. Under current technology, this integration is usually not possible due to the heterogeneity of information systems. One level of heterogeneity is that of semantics. The objective of this thesis is to build a framework for enumerating, classifying, and resolving the types of semantic heterogeneity that could exist in an object-oriented database model. The framework covers both schema and data content conflicts. The schema conflicts are classified broadly by the level at which they occur. the primary data conflicts covered include inconsistencies and different representations for the same data.

A Database Management System (DBMS) is system software for managing a large amount of data in secondary memory. The standard DBMS used today in both industry and the military is the Relational DBMS (RDBMS). The RDBMS is based upon the relational paradigm, whereas modern software development technologies that interact with the RDBMS are based upon the object-oriented paradigm. This difference in paradigms presents a conceptual mismatch which greatly reduces programmer and developer productivity. Additionally, wireless handheld devices have become ubiquitous both in the military and in the community at large. These handheld devices provide a convenient means of information access. To date, the military has failed to capitalize on the use of handheld devices as a convenient means of information access with respect to the large amounts of information stored in its databases. This thesis investigates various database application architectures and proposes an architecture that will not only overcome the conceptual mismatch between the relational and object-oriented paradigms, but also allows handheld device access to the database. A proof-of-concept prototype database application that provides handheld device access to a military personnel database is built to show the viability of the proposed architecture.

A Database Management System (DBMS) is system software for managing a large amount of data in secondary memory. The standard DBMS used today in both industry and the military is the Relational DBMS (RDBMS). The RDBMS is based upon the relational paradigm, whereas modern software development technologies that interact with the RDBMS are based upon the object-oriented paradigm. This difference in paradigms presents a conceptual mismatch which greatly reduces programmer and developer productivity. Additionally, wireless handheld devices have become ubiquitous both in the military and in the community at large. These handheld devices provide a convenient means of information access. To date, the military has failed to capitalize on the use of handheld devices as a convenient means of information access with respect to the large amounts of information stored in its databases. This thesis investigates various database application architectures and proposes an architecture that will not only overcome the conceptual mismatch between the relational and object-oriented paradigms, but also allows handheld device access to the database. A proof-of-concept prototype database application that provides handheld device access to a military personnel database is built to show the viability of the proposed architecture.