منابع مشابه
How many tastes are there?
How many basic tastes are there? Most people list four: sweet, sour, salty and bitter. Those with a background in the chemosensory sciences usually add a fifth, umami. But why stop there? There is growing evidence that there are more—perhaps many more. The idea that there are four basic tastes goes back at least as far as ancient Greece, so if there are more than four basic tastes why haven't t...
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'How many species are there' is a question receiving more attention from biologists and reasons for this are suggested. Different methods of answering this question are examined and include: counting all species; extrapolations from known faunas and regions; extrapolations from samples; methods using ecological models; censusing taxonomists' views. Most of these methods indicate that global tot...
متن کاملHow many words are there?
The commonsensical assumption that any language has only finitely many words is shown to be false by a combination of formal and empirical arguments. Zipf's Law and related formulas are investigated and a more complex model is offered.
متن کاملHow Many Types Are There?
We consider an revealed preference based method which will partition consumer microdata into an approximate minimal number of preference types such that the data are perfectly rationalisable by standard utility theory. This provides a simple, nonparametric and theory-driven way of investigating unobserved preference heterogeneity in empirical data, and easily extends to any choice model which h...
متن کاملThe pathway to RCTs: how many roads are there? Examining the homogeneity of RCT justification
BACKGROUND Randomized controlled trials (RCTs) form the foundational background of modern medical practice. They are considered the highest quality of evidence, and their results help inform decisions concerning drug development and use, preventive therapies, and screening programs. However, the inputs that justify an RCT to be conducted have not been studied. METHODS We reviewed the MEDLINE ...
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ژورنال
عنوان ژورنال: Rinsho yakuri/Japanese Journal of Clinical Pharmacology and Therapeutics
سال: 1999
ISSN: 1882-8272,0388-1601
DOI: 10.3999/jscpt.30.189