The transmission risk of foot-and-mouth disease (FMD) in Japan was evaluated using a mathematical FMD transmission model. The distance-based transmission rate between farms, which was parameterized using the FMD epidemic data in 2010 in Japan, was used to calculate the local-level reproduction numbers-expected numbers of secondary infections caused by one infected farm-for all cattle and pig fa...

Agricultural policy faces conflicting social goals. On one hand, efficient large-scale agriculture provides an adequate, low cost food supply, but many Americans continue to idealize the smaller family farm, believing that it promotes a democratic society with strong values. The changing structure of agriculture from many small farms to fewer but larger farms is a concern often expressed. Many ...

To set productivity standards and targets, and investigate inter-relationships between key measurements in swine breeding herds, farm productivity measurements were analyzed on 87 Japanese commercial farms in 14 prefectures. The 87 herds were ranked on the basis of number of pigs weaned per mated female per year (PWMFY), and 23 herds in the upper 25th percentile of this ranking were designated ...

The extensive expansion of large photovoltaic (PV) farms in power systems diminishes both system inertia and synchronizing coupling. Due to the occurrence of several faults, the power system transient stability may be damaged. However the transient stability is improved by the fast power controlling ability of the PV inverter. This paper focuses on the new application of large PV farms equipped...

The impact of human activities on the environment as a consequence of the industrialization process, the rising trend of the price of fossil fuels, and the incentives offered by governments in many countries have driven the development and evolution of renewable energy sources such as wind energy. The optimal selection of on-line units and optimal output levels of committed units for convention...

A challenge for the efficient operation of power systems and wind farms is the occurrence of wind power ramps, which are sudden large changes in the power output from a wind farm. This paper considers the probabilistic forecasting of a ramp event, defined as exceedance beyond a specified threshold. We directly model the exceedance probability using autoregressive logit models fitted to the chan...

Sustainability is a social concern and a new strategic factor for productive and economic viability. Nevertheless, research on this subject in a holistic approach is limited, and even to a lesser extent when dealing with family farms. This paper analyzes the impact of different aspects of sustainability (socio-economic characteristics, environmentally respectful practices, and innovation) on pr...

Take Home Messages-Automated activity monitoring systems (AAM) can be incorporated as a tool to replace visual observation of estrus.-General considerations before an AAM system acquisition include: current estrus detection (ED) efficiency, system cost, visual observations cost, and system life expectancy. Purchasing a system with a life expectancy of at least 5 years would be critical under al...

Abstract Periurban farming systems are characterized by the need to adapt practices coping with a modified natural and social environment. Questions thus posed on efficient use of inputs. The purpose this study is estimate technical efficiency productivity periurban farms. To do so, employs data envelopment analysis that properly captures heterogeneity system. sample considered livestock crop f...

In developing countries, irrigation can help to decrease poverty in rural areas through increased employment the agricultural sector. Evidence shows that may increase farm productivity and technical efficiency. this paper, we estimate effect of on efficiency Brazil using 2006 Agricultural Census dataset more than 4 million farms. We a stochastic production frontier at level, considering potenti...