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Users need to account for qualities and limitations of databases and search engines, especially those searching systematically for records such as in systematic reviews or meta-analyses. [2] As the distinction between a database and a search engine is unclear for these complex document retrieval systems, see:
Evaluation measures for an information retrieval (IR) system assess how well an index, search engine, or database returns results from a collection of resources that satisfy a user's query. They are therefore fundamental to the success of information systems and digital platforms.
Search engine indexing is the collecting, parsing, and storing of data to facilitate fast and accurate information retrieval. Index design incorporates interdisciplinary concepts from linguistics , cognitive psychology , mathematics, informatics , and computer science .
Information retrieval is the science [1] of searching for information in a document, searching for documents themselves, and also searching for the metadata that describes data, and for databases of texts, images or sounds. Automated information retrieval systems are used to reduce what has been called information overload. An IR system is a ...
Discounted cumulative gain (DCG) is a measure of ranking quality in information retrieval. It is often normalized so that it is comparable across queries, giving Normalized DCG (nDCG or NDCG). NDCG is often used to measure effectiveness of search engine algorithms and related applications.
The first internet search engines predate the debut of the Web in December 1990: WHOIS user search dates back to 1982, [8] and the Knowbot Information Service multi-network user search was first implemented in 1989. [9] The first well documented search engine that searched content files, namely FTP files, was Archie, which debuted on 10 ...
Knowledge retrieval seeks to return information in a structured form, consistent with human cognitive processes as opposed to simple lists of data items. It draws on a range of fields including epistemology (theory of knowledge), cognitive psychology, cognitive neuroscience, logic and inference, machine learning and knowledge discovery, linguistics, and information technology.
Oklahoma Violent Death Reporting System (OKVDRS) - is a collaborative effort between the Oklahoma State Department of Health, Office of the Chief Medical Examiner, and the OSBI. This national surveillance system collects information on violent deaths to include suicides, homicides, deaths from legal intervention (a subtype of homicide where the ...