Database and Data Communication Network Systems, by Cornelius T. Leondes

By Cornelius T. Leondes

Database and information verbal exchange community Systems examines the usage of the web and native Area/Wide sector Networks in all parts of human activity. This three-volume set covers, between different issues, database structures, info compression, database structure, facts acquisition, asynchronous move mode (ATM) and the sensible program of those applied sciences. The foreign selection of individuals used to be culled from exhaustive learn of over 100,000 comparable archival and technical journals.

This reference may be crucial to engineering and laptop technology libraries, study libraries, and telecommunications, networking, and desktop businesses. It covers a various array of themes, including:

* recommendations in rising database procedure architectures
* innovations and purposes in facts mining
* Object-oriented database systems
* facts acquisition at the WWW in the course of heavy client/server site visitors periods
* details exploration at the WWW
* schooling and coaching in multimedia database systems
* facts constitution concepts in quick prototyping and manufacturing
* instant ATM in info networks for cellular systems
* functions in company finance
* medical facts visualization
* information compression and knowledge retrieval
* ideas in clinical platforms, extensive care devices

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Extra resources for Database and Data Communication Network Systems, Three-Volume Set: Techniques and Applications

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These technologies have prevailed for decades. The use of SQL, a declared data definition language and data manipulation language, is another push for the database population growth. Several famous relational database management systems were built from academic research projects, such as INGRES from University of California, Berkeley, Austin's System 2000 from University of Texas, Austin, and computer companies, such as System R from IBM. In 1980, the popularity of personal computers awakened the need for end-user computing.

The intercommunication among sites for granting the data locks and the permissions for data access increases the network loading. Related issues are the handling of updates when one site crashes at the moment of updating and finding the most current copy when recovering. Therefore, timestamping, locking, updating, recovering, and deadlock, weave a complex web for a distributed database. Also, the reliability of networks creates an obstacle in using a distributed database. Many questions, such as how many copies should be kept and where they should be kept, affect cost and performance.

The composite reference can also be distinguished as dependent and independent. This aspect is used to analyze the existence between the composite object and the component object. It is called a dependent composite reference if the component objects cannot exist when the corresponding composite object is deleted. However, in the independent composite reference, the component objects can exist no matter whether the composite object exists. 2. , a relationship, between related objects. For example, a manager is associated with employees in his research department through the project relationship.

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