نتایج جستجو برای: farm heterogeneity
تعداد نتایج: 132579 فیلتر نتایج به سال:
This study determined whether multilocus sequence types (MLST) of Campylobacter from poultry in 2 farms in Grenada, West Indies, differed by farm, antimicrobial resistance and farm antibiotic use. Farm A used fluoroquinolones in the water and Farm B used tetracyclines. The E-test was used to determine resistance of isolates to seven antibiotics. PCR of the IpxA gene confirmed species and MLST w...
OBJECTIVE Develop and test a farm health and injury prevention educational intervention for high school agriculture students. SETTING Twenty one high schools in Kentucky, Iowa, and Mississippi. METHODS A quasiexperimental crossover design was used to test the effectiveness of two sets of instructional materials designed through participatory action research with agriculture teachers and stu...
OBJECTIVE To evaluate the potential for the North American Guidelines for Children's Agricultural Tasks (NAGCAT) to prevent the occurrence of pediatric farm injuries. This evaluation focuses upon farm injuries experienced when children were engaged in farm work. DESIGN Novel outcome evaluation involving primary review of three retrospective case series. SETTING Fatal, hospitalized, and rest...
High electricity consumption, associated with running Internet scale server farms, not only reflects on the data center’s greenhouse gas emissions, but also increases the cost of running the data center itself. In this paper, we consider the problem of maximizing the revenues of service providers running large scale data centers subject to setup cost by reducing their electricity bill, while co...
For the HERA-B experiment, which will start taking data in 1998, a multi-processor system (processor farm) is planned to perform the third level trigger task and the full event reconstruction online. To study possible architectures and implementations of hardware and software, it is foreseen to build a test system for the processor farm in 1996. If the system can be completed in time, a rst tes...
Along with agricultural economy development, the farm machinery product type Increases gradually, the ergonomics question is also getting more and more prominent. The widespread application of computer aided machinery design makes it possible that farm machinery design is intuitive, flexible and convenient. At present, because the developed computer aided ergonomics software has not suitable hu...
SUMMARY In this study, Coxiella burnetii seroprevalence was assessed for dairy and non-dairy sheep farm residents in The Netherlands for 2009-2010. Risk factors for seropositivity were identified for non-dairy sheep farm residents. Participants completed farm-based and individual questionnaires. In addition, participants were tested for IgG and IgM C. burnetii antibodies using immunofluorescent...
In the past three decades, farm families have relied on government payments and off-farm income to reduce income risk and increase total household income. Many studies have analyzed the role of government payments; however, little is known about the impact of health insurance coverage on labor allocation. This study builds on previous literature by using copulas to test for dependence in the la...
T paper examines the health of farm workers in the United States. Although farm workers constitute a small fraction of the overall U.S. workforce, their health is of special concern because of greater exposure to toxic chemicals, work-related injuries, and other occupational hazards. The U.S. agricultural sector is heavily dependent on hired farm workers who constitute about 30% of the agricult...
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