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[4] [5] Controlled vocabularies solve the problems of homographs, synonyms and polysemes by a bijection between concepts and preferred terms. In short, controlled vocabularies reduce unwanted ambiguity inherent in normal human languages where the same concept can be given different names and ensure consistency. [3]
ISO 25964, the international standard for information retrieval thesauri, defines a thesaurus as a “controlled and structured vocabulary in which concepts are represented by terms, organized so that relationships between concepts are made explicit, and preferred terms are accompanied by lead-in entries for synonyms or quasi-synonyms.”
To identify the control variables needed here, one could ask what other variables determine not only someone's life satisfaction but also their age. Many other variables determine life satisfaction. But no other variable determines how old someone is (as long as they remain alive). (All people keep getting older, at the same rate, no matter ...
Despite 11 rate hikes and two consecutive pauses, inflation remains sticky at 3.7%, according to the latest consumer price index (CPI). This result remains quite distant from the Federal Reserve's...
A true experiment would, for example, randomly assign children to a scholarship, in order to control for all other variables. Quasi-experiments are commonly used in social sciences, public health, education, and policy analysis, especially when it is not practical or reasonable to randomize study participants to the treatment condition.
While most executive agencies have a single director, administrator, or secretary appointed by the president of the United States, independent agencies (in the narrower sense of being outside presidential control) almost always have a commission, board, or similar collegial body consisting of five to seven members who share power over the ...
1904 cartoon warning attendees of the St. Louis World's Fair of hotel room price gouging. Price gouging is a pejorative term for the practice of increasing the prices of goods, services, or commodities to a level much higher than is considered reasonable or fair by some.
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