Results 101 to 110 of about 538,081 (247)

How cold is too cold? A theoretical analysis of the optimal trigger for index insurance for frost damage to crops

open access: yesAmerican Journal of Agricultural Economics, EarlyView.
Abstract Crop insurance is undoubtedly an extremely valuable element in protecting agricultural businesses, but in many cases standard indemnity‐based products have had very low uptake due to high transaction costs elevating premiums to unaffordable levels.
Amogh Prakasha Kumar   +2 more
wiley   +1 more source

Asymptotic expansion of closed geodesics in homology classes. [PDF]

open access: yes, 2004
In this paper we give a full asymptotic expansion for the number of closed geodesics in homology classes.
Liu, Dongsheng
core   +2 more sources

Ecoepidemiological Model and Analysis of MSV Disease Transmission Dynamics in Maize Plant

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2019
In this paper, an ecoepidemiological deterministic model for the transmission dynamics of maize streak virus (MSV) disease in maize plant is proposed and analysed qualitatively using the stability theory of differential equations.The basic reproduction ...
Haileyesus Tessema Alemneh   +2 more
doaj   +1 more source

Accounting for animal health in efficiency analysis: An application to Swedish dairy farms

open access: yesAmerican Journal of Agricultural Economics, EarlyView.
Abstract Poor animal health is a central concern in modern livestock production. Despite the necessity to incorporate animal health in efficiency analysis, the theoretical and empirical developments are limited on this subject. This article appropriately characterizes the axiomatic properties of animal health within a production framework.
Frederic Ang   +3 more
wiley   +1 more source

Traveling waves of a delayed epidemic model with spatial diffusion

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2017
In this paper, we study the existence and non-existence of traveling waves for a delayed epidemic model with spatial diffusion. That is, by using Schauder's fixed-point theorem and the construction of Lyapunov functional, we prove that when the basic ...
Wu Pei, Qiaoshun Yang, Zhiting Xu
doaj   +1 more source

Redistributive land reforms, agricultural productivity, and structural change: New cross‐national evidence

open access: yesAmerican Journal of Agricultural Economics, EarlyView.
Abstract Large‐scale land reforms constitute a substantial redistribution of wealth and reallocation of agricultural land, which is a major form of asset and production input in developing countries. While land redistribution (from the rich to the poor) remains a highly controversial issue, extensive evidence on its effect is limited.
Devashish Mitra   +3 more
wiley   +1 more source

Dynamics for a diffusive epidemic model with a free boundary: sharp asymptotic profile [PDF]

open access: yes
This paper concerns the sharp asymptotic profiles of the solution of a diffusive epidemic model with one free boundary and one fixed boundary which is subject to the homogeneous Dirichlet boundary condition and Neumann boundary condition, respectively ...
Li, Xueping, Li, Lei, Wang, Mingxin
core   +1 more source

Exposure to heat waves and drought improves subsequent leaf heat tolerance for five oak species in southern California

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Given the threats of climate change, we investigated the impact of high temperatures separately and in combination with reduced soil water on leaf heat tolerance for five oaks (Fagaceae) with overlapping ranges in southern California, USA: Quercus agrifolia and Q. chrysolepis (evergreen species), Q. douglasii and Q.
Casey D. Wisely   +7 more
wiley   +1 more source

Layered Steered Space–Time-Spreading-Aided Generalized MC DS-CDMA

open access: yes, 2010
—We present a novel trifunctional multiple-input– multiple-output (MIMO) scheme that intrinsically amalgamates space–time spreading (STS) to achieve a diversity gain and a Vertical Bell Labs layered space–time (V-BLAST) scheme to attain a multiplexing ...
Alamri, Osamah   +7 more
core   +1 more source

Overview on a selection of recent works in asymptotic analysis for wave propagation problems [PDF]

open access: yes, 2010
We give a brief survey of some recent advances of asymptotic analysis methods applied to wave propagation ...
Claeys, Xavier
core  

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