Computer-based information technologies have been extensively used to help industries manage their processes and information systems become their nervous center. More specifically, databases are designed to support the data storage, processing, and retrieval activities related to data management in information systems. Database management systems provide efficient task support and tremendous ga...

As discussed earlier in this book, GenBank was created in response to the explosion in sequence information resulting from a panoply of scientific efforts such as the Human Genome Project. To review, GenBank is an annotated collection of all publicly available DNA and protein sequences and is maintained by the National Center for Biotechnology Information (NCBI). As of this writing, GenBank con...

The hypermedia format is particularly useful for presentation of museum data where information about a topic or artifact is normally presented using multiple media, such as images, text, tables, charts, film, sound tracks, and/or video. The French Ministry of Culture has perhaps the most ambitious museum project. It will contain more than 22.5 million documents (Mannoni 1996, 1997). J. Bowen ma...

Information systems have become the nerve center of current computer-based engineering applications, which hereby put the requirements on engineering information modeling. Databases are designed to support data storage, processing, and retrieval activities related to data management, and database systems are the key to implementing engineering information modeling. It should be noted that, howe...

We consider query processing in deductive databases with incomplete information in the form of null values. We motivate the problem of extracting the maximal information from a (deductive) database in response to queries, and formalize this in the form of conditional answers. We give a sound and complete top-down proof procedure for generating conditional answers. We also extend the well-known ...

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background: accurate and timely information and communication are vital to adequately prepare individual health organizations for emergency events. the current article investigated health-related communication and information systems for emergency management in iran. methods: the present study was conducted in 2009 with a mixed qualitative and quantitative approach. simple random purposeful sam...