Operator

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Operator

One who holds the working or operating rights in a gas or oil activity and is obligated for the costs of development and production.
References in periodicals archive ?
In present article several tools for efficient search are discussed, like Boolean operators (AND", OR", NOT"), filters, search field tags, use of MeSH terms, wildcard ( ") and search with key words.
Also there are weighs for Boolean operators in queries, where each Boolean operator has a weight within range of values as in terms weights; such as [0, 1].
The objective of this generalization is twofold: on the one hand, to allow for graduated inputs to the Boolean operators so that the representation of documents in terms of vectors of Boolean characteristics can be extended to vectors of feature weights, while, on the other hand, to generate real-valued operator output so that dichotomous relevance judgments can be replaced by document ranking in response to user's queries.
It shares common advanced search features with Topsy, including Boolean operators, phrase searching, and date ranging.
Lastly, you can use regular expressions (regex), wildcards, or boolean operators to greatly enhance your search results.
The LogicsManager uses Boolean operators and programmable timers to provide complex system control and can eliminate the need for a separate PLC.
Among the specific aspects she addresses are identifying valid online bibliographic and article databases, using Boolean operators to refine a search, organizing the research literature by using bibliographic software, preparing a structured abstraction form, synthesizing and reporting results as part of proposals and papers or as a stand-alone report, evaluating qualitative research studies, and understanding and evaluating meta-analysis research.
In addition, as predicted, for the problem solving process, information seeking including request of feedback, browsing, searching for information and searching using Boolean operators were all significantly related to group outcome for both groups.
This activity offers students an opportunity to select appropriate databases, use advanced search techniques, and practice how to phrase search terms using Boolean operators to locate peer reviewed journal articles that meet criteria for scholarly research.
This year marks the 10th anniversary of the launch of Alta Vista in December 1995 and more than 40 years since the first full-text search engine with Boolean operators became operational.
Net users have become more sophisticated and adept at using keywords and Boolean operators to construct more effective queries.
Then, after a quick explanation of what basic Boolean operators and and or are supposed to do, 1 use the operators to have specific sets of "student web sites" step forward from the pool.