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The project involved the design and implementation of a data dictionary system in a distributed development environment. The distributed environment consists of a central computer that hosts a database management system, a conglomerate of workstations, and the communications links between the workstations and central computer. The emphasis of the research was placed on the design of a user-friendly data dictionary editor that was implemented on a prototype workstation. Data dictionary definitions are created and updated at the workstation and transfered between the workstation and central computer database. Background information is provided on data dictionary systems, aspects of human-computer interfaces, and distributed environment interface issues. The design and development of the special editor and the database interface software are described in detail in this thesis.
This book addresses issues related to managing data across a distributed database system. It is unique because it covers traditional database theory and current research, explaining the difficulties in providing a unified user interface and global data dictionary. The book gives implementers guidance on hiding discrepancies across systems and creating the illusion of a single repository for users. It also includes three sample frameworks—implemented using J2SE with JMS, J2EE, and Microsoft .Net—that readers can use to learn how to implement a distributed database management system. IT and development groups and computer sciences/software engineering graduates will find this guide invaluable.
Although data resources have some characteristics with other corporate resources, such as people, goods or money, they do not have two specific characteristics. They are not relatively scarce, neither are they inherently allocatable. However, they do have value, both positive or negative. The value is derived from the fact that the entire enterprise depends on their availability for the proper management of all the other resources. Organizations are now beginning to treat data as a resource, which requires the same degree of administration and control as is involved in the management of other resources. A key component in this management and control is the Data Dictionary/Directory System. It is a useful tool, throughout a System Development Life Cycle.
This User’s Guide is intended to support the design, implementation, analysis, interpretation, and quality evaluation of registries created to increase understanding of patient outcomes. For the purposes of this guide, a patient registry is an organized system that uses observational study methods to collect uniform data (clinical and other) to evaluate specified outcomes for a population defined by a particular disease, condition, or exposure, and that serves one or more predetermined scientific, clinical, or policy purposes. A registry database is a file (or files) derived from the registry. Although registries can serve many purposes, this guide focuses on registries created for one or more of the following purposes: to describe the natural history of disease, to determine clinical effectiveness or cost-effectiveness of health care products and services, to measure or monitor safety and harm, and/or to measure quality of care. Registries are classified according to how their populations are defined. For example, product registries include patients who have been exposed to biopharmaceutical products or medical devices. Health services registries consist of patients who have had a common procedure, clinical encounter, or hospitalization. Disease or condition registries are defined by patients having the same diagnosis, such as cystic fibrosis or heart failure. The User’s Guide was created by researchers affiliated with AHRQ’s Effective Health Care Program, particularly those who participated in AHRQ’s DEcIDE (Developing Evidence to Inform Decisions About Effectiveness) program. Chapters were subject to multiple internal and external independent reviews.
"The eleventh edition of Systems Analysis and Design includes extensive changes inspired by the rapid transformations in the IS field over the past few years, and they are included as a response to the helpful input of our audience of adopters, students, and academic reviewers. Many new and advanced features are integrated throughout this new edition"--
This text combines strong theoretical and foundational concepts with a practical real world approach. Grounded in a strong European perspective, it provides balanced and integrative coverage of the full range of interdisciplinary issues within IS, including development, management, environment and technology. It is suitable for both undergraduate and postgraduate students of information systems with a basic knowledge of information technology.