منابع مشابه
Impossible Frontiers
A key result of the Capital Asset Pricing Model (CAPM) is that the market portfolio— the portfolio of all assets in which each asset’s weight is proportional to its total market capitalization—lies on the mean-variance-efficient frontier, the set of portfolios having mean-variance characteristics that cannot be improved upon. Therefore, the CAPM cannot be consistent with efficient frontiers for...
متن کاملImpossible Words?
The idea that quotidian, middle-level concepts typically have internal structure-definitional, statistical, or whatever—plays a central role in practically every current approach to cognition. Correspondingly, the idea that words that express quotidian, middle-level concepts have complex representations "at the semantic level" is recurrent in linguistics; it is the defining thesis of what is of...
متن کاملImpossible fractals
Impossible objects are a type of optical illusion involving ambiguous visual descriptions of figures that cannot physically exist. It is shown by way of example that such objects can be further developed using standard fractal techniques to create new, more complex designs that retain the perceptual illusion, sometimes allowing additional illusions to emerge from the process. The balanced Pytha...
متن کاملInterruption Impossible
Most current work on spoken human-computer interaction has so far concentrated on interactions between a single user and a dialogue system. The advent of ideas of the computer or dialogue system as a conversational partner in a group of humans, for example within the CHIL-project and elsewhere (e.g. Kirchhoff & Ostendorf, 2003), introduces new requirements on the capabilities of the dialogue sy...
متن کاملImpossible dreams.
You will understand the title at one level by knowing that I have been a fan of the Boston Red Sox for about seventy years. This loyalty was partially rewarded about seventeen years ago when by chance I had the pleasure of spending an hour with my boyhood hero, Ted Williams. At about the time that I started to follow the Red Sox games by radio, I acquired the notion that I would like someday to...
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ژورنال
عنوان ژورنال: British Dental Journal
سال: 2012
ISSN: 0007-0610,1476-5373
DOI: 10.1038/sj.bdj.2012.731