In this paper we study the class of differential variational inequality(DVI) in a finite-dimension Euclidean space <n, which is the following form ẋ(t) = f(t, x(t)) + B(t, x(t))u(t) , x(0) = x0 ∈ <n 0 ≤ (ũ− u(t))T [G(t, x(t)) + F (u(t))] for almost all ũ ∈ K u(t) ∈ K We study stability and perturbation of the DVI under the OSL condition. Besides, we establish a Prior Bound Theorem, which is a u...

Traditional selection based on genetic merit calculated from phenotypic and pedigree information has been tremendously effective at improving production in dairy cattle. Hypothetically, genetic improvement could be accelerated even further for yield and other economically important traits by directly selecting upon the genetic differences underlying the phenotypes. To elucidate these genetic di...

An antagonistic genetic relationship between direct and maternal effects for birth weight (and weaning weight) makes the concurrent genetic improvement of the two traits more challenging than if the correlation was zero or favourable. The direction and magnitude of the genetic correlation between maternal and direct effects for lamb birth weight are equivocal with several moderate negative and ...

Profit from cattle enterprises is influenced by the value of sale animals, less the costs of their production. Ever-changing production and economic circumstances provide both threats and opportunities to cow-calf producers, bull breeders and feedlotters. Feeding strategies and other aspects of management typically require continuous betweenand within-year modification in order to optimize marg...

information required to benchmark yields. These include Growers, breeders and policy makers require benchmarks to measure performance in regard to management of the crop, genetic improvement and prospects for investment and employment. Cropping systems are difficult to benchmark because of the unpredictable nature of the climate. In this paper previous attempts to benchmark sugarcane production...

Dr. Gordon E. Dickerson was a visionary and productive scientist whose many scientific contributions included a systems approach to the genetic improvement of economic efficiency of beef production. His most important contributions to the improvement of beef efficiency include: 1) insisting on an economic definition of the biological objectives of livestock production, 2) promoting multi-discip...

As for any species or population, genetic improvement of dairy cattle involves determining a desirable direction for improvement, identifying traits that provide information to move in that direction, quantifying their heritability, deciding how to evaluate them, and designing a breeding program to achieve the goals. With regard to these issues, dairy cattle are one of the most highly studied o...

The Lethal Yellowing disease is one of the main threats to coconut industry in many parts of Africa and the Caribbean. Planting resistant varieties has long been recognized as one of the most promising ways of controlling it. Considerable efforts have been devoted throughout the world to screening suitable varieties and have often involved international co-operation. It has proven to be a lengt...