نتایج جستجو برای: specialization

تعداد نتایج: 14435  

2006
Niclas Norrström Wayne M. Getz Noél M.A. Holmgren

Darwin's Principle of Divergence explains sympatric speciation as gradual and directional. Contradicting evidence suggests that species' traits evolve saltationally. Here, we model coevolution in exploiter-victim systems. Victims (resource population) have heritable, mutable cue phenotypes with different levels of defense. Exploiters have heritable, mutable perceptual phenotypes. Our simulation...

2013
Robert Marquez

We analyze optimal financial contracts when the specificity of investments is endogenous. Specialization decreases the liquidation value of assets, but improves the asset’s long-term productivity. While the former is known to make financing more difficult, we show that the latter can ease financing constraints and increase financing capacity by improving an entrepreneur’s incentive to repay. Th...

1999
Ulrik Pagh Schultz

Software components o er numerous advantages in terms of development, but may give rise to ine ciency due to highly generic implementations. Program specialization can automatically remove overheads due to overly generic implementations, but requires inspection of the source code. To retain the advantages of black-box software components, we propose black-box program specialization: specializat...

Journal: :Schizophrenia bulletin 1999
L J Harris

This article provides an account of early theory and research on hemispheric specialization. It begins by tracing theory and research on localization of function that set the stage for the discovery of hemispheric specialization. After that, it describes the studies of Paul Broca, John Hughlings-Jackson, and others on hemisphere specialization and reviews some of the proposed explanations for t...

2015
CHEN Xu QIU Bin

By using the data of Chinese manufacturing enterprises between 1999 and 2009, the specialization and diversification of China’s exports are calculated. The relationship between financial development and the specialization of export and diversification of exports were studied by using dynamic panel data. It is found that financial credit development could significantly improve specialization of ...

2013
Stephanie Cacioppo Francesco Bianchi-Demicheli Paul Bischof Dominique DeZiegler Christoph M. Michel Theodor Landis

A growing body of behavioral studies has demonstrated that women's hemispheric specialization varies as a function of their menstrual cycle, with hemispheric specialization enhanced during their menstruation period. Our recent high-density electroencephalogram (EEG) study with lateralized emotional versus neutral words extended these behavioral results by showing that hemispheric specialization...

1999
Renaud Marlet Charles Consel Philippe Boinot

Availability of data in a program determines compu tation stages Incremental partial evaluation exploit these stages for optimization it allows further special ization to be performed as data become available at later stages The fundamental advantage of incremental specialization is to factorize the specialization process As a result specializing a program at a given stage costs considerably le...

2011
Fabio Fioravanti Alberto Pettorossi Maurizio Proietti Valerio Senni

Program specialization has been proposed as a means of improving constraint-based analysis of infinite state reactive systems. In particular, safety properties can be specified by constraint logic programs encoding (backward or forward) reachability algorithms. These programs are then transformed, before their use for checking safety, by specializing them with respect to the initial states (in ...

Journal: :Proceedings. Biological sciences 2016
Jesper Sonne Ana M Martín González Pietro K Maruyama Brody Sandel Jeferson Vizentin-Bugoni Matthias Schleuning Stefan Abrahamczyk Ruben Alarcón Andréa C Araujo Francielle P Araújo Severino Mendes de Azevedo Andrea C Baquero Peter A Cotton Tanja Toftemark Ingversen Glauco Kohler Carlos Lara Flor Maria Guedes Las-Casas Adriana O Machado Caio Graco Machado María Alejandra Maglianesi Alan Cerqueira Moura David Nogués-Bravo Genilda M Oliveira Paulo E Oliveira Juan Francisco Ornelas Licléia da Cruz Rodrigues Liliana Rosero-Lasprilla Ana Maria Rui Marlies Sazima Allan Timmermann Isabela Galarda Varassin Zhiheng Wang Stella Watts Jon Fjeldså Jens-Christian Svenning Carsten Rahbek Bo Dalsgaard

Ecological communities that experience stable climate conditions have been speculated to preserve more specialized interspecific associations and have higher proportions of smaller ranged species (SRS). Thus, areas with disproportionally large numbers of SRS are expected to coincide geographically with a high degree of community-level ecological specialization, but this suggestion remains poorl...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2004
R Craig MacLean Graham Bell Paul B Rainey

The evolution of ecological specialization is expected to carry a cost, due to either antagonistic pleiotropy or mutation accumulation. In general, it has been difficult to distinguish between these two possibilities. Here, we demonstrate that the experimental evolution of niche-specialist genotypes of the bacterium Pseudomonas fluorescens that colonize the air-broth interface of spatially stru...

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