The error analysis revealed that word variations as well as certain word combinations adversely affected classification.
The search strategy in the Cochrane Library was lixisenatide, ti,ab,kw (Word variations have been searched).
Our search terms consisted of MeSH headings and subheadings, text words, and word variations for "combined oral contraceptive," "estrogens," "progestogens," and "venous thromboembolism".
Our search term combinations consisted of MeSH subheadings, text words and word variations for "heavy menstrual bleeding," and the various types of first and second generation endometrial destruction techniques.
Though stemming is performed on words in the text documents, ontologies and queries in an effort to reduce each term to its base word, variations in terms do exist that stemming does not account for.
Given that the vocabulary of death certificates is somewhat constrained, an effective term normalisation (e.g., folding synonyms to a single root term) method could be developed to deal with issues around word variations.
The reasons underlying the errors were identified and errors were assigned to one or more categories (the breakdown of which is shown in Table 6):Word variations: Lexical variants of the same disease.
In the Cochrane Library the search terms were: (fall) and (exercise or tai chi or training or physical activity) excluding (Alzheimer or Parkinson's or dementia or nursing home or protocol or athletes) in the title or abstract of trials, with the word "prevention" in the text and the word variations option enabled.
In other words, variation in band gap energy maybe related to the nanotubes morphology.
In other words, variation is not always random – it is sometimes directed, with improved mating opportunities as a significant motivation.
