Results 61 to 70 of about 194,720 (307)
About Twistor Spinors with Zero in Lorentzian Geometry [PDF]
, 2009 We describe the local conformal geometry of a Lorentzian spin manifold $(M,g)$ admitting a twistor spinor $\phi$ with zero. Moreover, we describe the shape of the zero set of $\phi$. If $\phi$ has isolated zeros then the metric $g$ is locally conformally
Leitner, Felipe
core +4 more sources
, 2019 The high rate of injuries occurring in agricultural activities is of major concern in most countries, despite the ever-increasing efforts made at normative levels.
M. Fargnoli, M. Lombardi
semanticscholar +1 more source
Pest Management Science, EarlyView.The findings of this study indicate that powdery mildew control achieved with the pneumatic solid set canopy delivery system (PSD‐SSCDS) was comparable with that of a conventional airblast sprayer. These results highlight the PSD‐SSCDS as a promising alternative spray technology. Abstract BACKGROUND In this study, a previously optimized pneumatic spray
Dattatray G Bhalekar +4 more
wiley +1 more source
Agriculture, 2018 Recently, standards and regulations concerning occupational safety have become more and more rigorous. Nevertheless, the number of accidents and victims has not decreased significantly, as reported by official statistics.
M. Fargnoli +3 more
semanticscholar +1 more source
Journal of Field Robotics, EarlyView.ABSTRACT Sustainable weed management necessitates herbicide‐reduced, precision weed control. Recent advancements in machine vision and artificial intelligence (AI) for weed recognition and localization have created new opportunities for high‐precision weeding. Although blanket spraying systems are widely used for weed removal, machine vision‐guided, AI‐
Boyang Deng, Yuzhen Lu, Daniel Brainard
wiley +1 more source
Sustainable Development, EarlyView.ABSTRACT Climate change affects all individuals, regardless of wealth, social class, or religious background, though its impacts and adaptation strategies vary. While existing literature examines climate change adaptation based on farming categories, geographic regions, and cropping systems, limited research explores how social class shapes adaptation ...
Nasir Abbas Khan +2 more
wiley +1 more source
The Division of Labor, Investment, and Capital [PDF]
This paper uses a dynamic general equilibrium model based on corner solutions to formalize the classical theory of investment and capital which considers investment to be a vehicle for developing a high level of division of labor in roundabout productive
Xiaokai Yang
core
Sustainable Development, EarlyView.ABSTRACT Sustainable development transforms production systems, requiring integrated environmental, social, and economic strategies. Energy systems are key agro‐industrial supply chains in developing countries. Brazil's soybean supply chain impacts Gross Domestic Product, mainly through exports.
Aline Veronese da Silva +3 more
wiley +1 more source
A Cinderella Story: The Early Evolution of the American Tractor Industry [PDF]
The arrival of motorization, from before the beginning of the twentieth century, has changed agricultural production and the whole economy by dramatically reducing work force and improving productivity.
Soumodip Sarkar, Vanessa Duarte
core
AgriEngineering, 2019 The expansion of services and technological equipment applied to the agribusiness sector grows year after year, e.g., tractors and agricultural machinery, which use systems shipped with sophisticated software that collaborate to aid, and optimize ...
Carlos Alexandre Gouvea da Silva +2 more
semanticscholar +1 more source