منابع مشابه
Context Mediation on Wall Street
This paper reports on a practical implementation of a context mediator for the fixed income securities industry. We describe industry circumstances and the data and calculation services (DCS) mediator developed and deployed in the early 1990s. The mediator was designed as an interpretive engine controlled by a static declarative knowledge structure and client preference data. In addition to het...
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That predators attack and prey defend is an oversimplified view. When size changes during development, large prey may be invulnerable to predators, and small juvenile predators vulnerable to attack by prey. This in turn may trigger a defensive response in adult predators to protect their offspring. Indeed, when sizes overlap, one may wonder "who is the predator and who is the prey"! Experiments...
متن کاملOccupy Wall Street, Bay Street and the street nearest you.
The Canadian Centre for Policy Alternatives released a study in early January highlighting the growing income disparities between the richest and poorest Canadians. Income tax files from 2007 show that the average income of the top 1% of income earners was over $400,000 compared to about $44,000 for the average Canadian, almost a tenfold difference. Those who laboured at the minimum wage earned...
متن کاملNon-lethal effects of predators on prey growth rates depend on prey density and nutrient additions
A number of studies show that predators can depress prey growth rates by inducing reductions in foraging activity, but the size of this non-lethal effect is quite variable. Here I investigate how prey density and resource productivity may alter the extent to which predators depress the growth rates of their prey. Theory predicts that when resources are overgrazed, an increase in predation risk ...
متن کاملDangerous prey and daring predators: a review.
How foragers balance risks during foraging is a central focus of optimal foraging studies. While diverse theoretical and empirical work has revealed how foragers should and do manage food and safety from predators, little attention has been given to the risks posed by dangerous prey. This is a potentially important oversight because risk of injury can give rise to foraging costs similar to thos...
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ژورنال
عنوان ژورنال: Review of Asset Pricing Studies
سال: 2014
ISSN: 2045-9920,2045-9939
DOI: 10.1093/rapstu/rau003