Results 371 to 380 of about 6,654,400 (432)

The Unity and Diversity of Executive Functions and Their Contributions to Complex “Frontal Lobe” Tasks: A Latent Variable Analysis

Cognitive Psychology, 2000
This individual differences study examined the separability of three often postulated executive functions-mental set shifting ("Shifting"), information updating and monitoring ("Updating"), and inhibition of prepotent responses ("Inhibition")-and their ...
A. Miyake, N. Friedman, M. J. Emerson, A. Witzki, A. Howerter, T. Wager   +5 more
semanticscholar   +1 more source

Diversity in tropical rain forests and coral reefs.

Science, 1978
The commonly observed high diversity of trees in tropical rain forests and corals on tropical reefs is a nonequilibrium state which, if not disturbed further, will progress toward a low-diversity equilibrium community.
J. Connell
semanticscholar   +1 more source

On the diversity of diversity

2007 IEEE Congress on Evolutionary Computation, 2007
Estimation of distribution algorithms (EDA) is an active area of research within the field of evolutionary algorithms. While EDAs have shown great promise on difficult problems with strong epistasis between genes, such as hierarchical and deceptive problems, they have not been a choice for non-stationary problems where the target solution changes over ...
Conor Ryan, David Wallin
openaire   +2 more sources

Monopolistic competition and optimum product diversity

, 1977
Pettengill tests whether there is an excessive number of firms in a monopolistically competitive equilibrium by a device of considerable expository merit. He removes one firm, and redistributes the resources thus released equally over the remaining firms
A. Dixit, J. Stiglitz
semanticscholar   +1 more source

Is Diversion Just a Diversion?

Medicine, Science and the Law, 1994
This paper examines the diversion of the mentally disordered offender against a background of the treatment of the mentally disordered in general. Some myths about incarceration are explored and the proposal is made that diversion is not a new idea. Finally, caution is expressed in the espousal of diversion in an uncritical fashion.
openaire   +3 more sources

Understanding Institutional Diversity

, 2005
Elinor Ostronr s Understanding Institutional Diversity draws an analogy between genetic rules of biological organisms and social rules of communities of humans.
E. Ostrom
semanticscholar   +1 more source

Mechanisms of Maintenance of Species Diversity

, 2000
▪ Abstract The focus of most ideas on diversity maintenance is species coexistence, which may be stable or unstable. Stable coexistence can be quantified by the long-term rates at which community members recover from low density.
P. Chesson
semanticscholar   +1 more source

Distributed space-time coded protocols for exploiting cooperative diversity in wireless networks

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE, 2002
We develop and analyze space-time coded cooperative diversity protocols for combating multipath fading across multiple protocol layers in a wireless network.
J. N. Laneman, G. Wornell
semanticscholar   +1 more source

A distance-based framework for measuring functional diversity from multiple traits.

Ecology, 2010
A new framework for measuring functional diversity (FD) from multiple traits has recently been proposed. This framework was mostly limited to quantitative traits without missing values and to situations in which there are more species than traits ...
E. Laliberté, P. Legendre
semanticscholar   +1 more source

Diversity and Evenness: A Unifying Notation and Its Consequences

, 1973
Three commonly used measures of diversity, Simpson's index, Shannon's entropy, and the total number of species, are related to Renyi's definition of a generalized entropy.
M. Hill
semanticscholar   +1 more source